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  • Cell Line  (84)
  • American Association for the Advancement of Science (AAAS)  (84)
  • American Institute of Physics (AIP)
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  • 2010-2014  (41)
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  • American Association for the Advancement of Science (AAAS)  (84)
  • American Institute of Physics (AIP)
  • Nature Publishing Group
  • Periodicals Archive Online (PAO)
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  • 2010-2014  (41)
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  • 1
    Publication Date: 2011-04-09
    Description: The spliceosome, a ribonucleoprotein complex that includes proteins and small nuclear RNAs (snRNAs), catalyzes RNA splicing through intron excision and exon ligation to produce mature messenger RNAs, which, in turn serve as templates for protein translation. We identified four point mutations in the U4atac snRNA component of the minor spliceosome in patients with brain and bone malformations and unexplained postnatal death [microcephalic osteodysplastic primordial dwarfism type 1 (MOPD 1) or Taybi-Linder syndrome (TALS); Mendelian Inheritance in Man ID no. 210710]. Expression of a subgroup of genes, possibly linked to the disease phenotype, and minor intron splicing were affected in cell lines derived from TALS patients. Our findings demonstrate a crucial role of the minor spliceosome component U4atac snRNA in early human development and postnatal survival.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Edery, Patrick -- Marcaillou, Charles -- Sahbatou, Mourad -- Labalme, Audrey -- Chastang, Joelle -- Touraine, Renaud -- Tubacher, Emmanuel -- Senni, Faiza -- Bober, Michael B -- Nampoothiri, Sheela -- Jouk, Pierre-Simon -- Steichen, Elisabeth -- Berland, Siren -- Toutain, Annick -- Wise, Carol A -- Sanlaville, Damien -- Rousseau, Francis -- Clerget-Darpoux, Francoise -- Leutenegger, Anne-Louise -- New York, N.Y. -- Science. 2011 Apr 8;332(6026):240-3. doi: 10.1126/science.1202205.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Hospices Civils de Lyon, Service de Cytogenetique Constitutionnelle, Bron, F-69677, France. patrick.edery@chu-lyon.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21474761" target="_blank"〉PubMed〈/a〉
    Keywords: Base Pairing ; Cell Line ; Child, Preschool ; Chromosomes, Human, Pair 2/genetics ; Dwarfism/genetics/metabolism ; Female ; Fetal Growth Retardation/genetics/metabolism ; Humans ; Infant ; Introns ; Inverted Repeat Sequences ; Male ; Microcephaly/genetics/metabolism ; Microtubule-Associated Proteins/genetics ; Nucleic Acid Conformation ; Osteochondrodysplasias/genetics/metabolism ; Pedigree ; *Point Mutation ; RNA Splice Sites ; *RNA Splicing ; RNA, Small Nuclear/chemistry/*genetics/metabolism ; Spliceosomes/*genetics/metabolism
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  • 2
    Publication Date: 2011-04-23
    Description: Protein synthesis and autophagic degradation are regulated in an opposite manner by mammalian target of rapamycin (mTOR), whereas under certain conditions it would be beneficial if they occurred in unison to handle rapid protein turnover. We observed a distinct cellular compartment at the trans side of the Golgi apparatus, the TOR-autophagy spatial coupling compartment (TASCC), where (auto)lysosomes and mTOR accumulated during Ras-induced senescence. mTOR recruitment to the TASCC was amino acid- and Rag guanosine triphosphatase-dependent, and disruption of mTOR localization to the TASCC suppressed interleukin-6/8 synthesis. TASCC formation was observed during macrophage differentiation and in glomerular podocytes; both displayed increased protein secretion. The spatial coupling of cells' catabolic and anabolic machinery could augment their respective functions and facilitate the mass synthesis of secretory proteins.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3426290/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3426290/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Narita, Masako -- Young, Andrew R J -- Arakawa, Satoko -- Samarajiwa, Shamith A -- Nakashima, Takayuki -- Yoshida, Sei -- Hong, Sungki -- Berry, Lorraine S -- Reichelt, Stefanie -- Ferreira, Manuela -- Tavare, Simon -- Inoki, Ken -- Shimizu, Shigeomi -- Narita, Masashi -- DK083491/DK/NIDDK NIH HHS/ -- R01 DK083491/DK/NIDDK NIH HHS/ -- R01 DK083491-03/DK/NIDDK NIH HHS/ -- Cancer Research UK/United Kingdom -- New York, N.Y. -- Science. 2011 May 20;332(6032):966-70. doi: 10.1126/science.1205407. Epub 2011 Apr 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cancer Research UK Cambridge Research Institute (CRI), Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21512002" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids/metabolism ; Animals ; *Autophagy ; *Cell Aging ; Cell Line ; Cytoplasm/metabolism ; Cytoplasmic Vesicles/*metabolism/ultrastructure ; Endoplasmic Reticulum, Rough/ultrastructure ; Genes, ras ; Golgi Apparatus/ultrastructure ; HL-60 Cells ; Humans ; Interleukin-6/metabolism ; Interleukin-8/metabolism ; Lysosomes/metabolism/ultrastructure ; Mice ; Monomeric GTP-Binding Proteins/genetics/metabolism ; Nocodazole/pharmacology ; Phagosomes/metabolism/ultrastructure ; Phenotype ; Podocytes/metabolism/ultrastructure ; Protein Biosynthesis ; Proteins/*secretion ; TOR Serine-Threonine Kinases/*metabolism ; Vacuoles/ultrastructure ; trans-Golgi Network/metabolism/ultrastructure
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  • 3
    Publication Date: 2011-07-23
    Description: 5-methylcytosine (5mC) in DNA plays an important role in gene expression, genomic imprinting, and suppression of transposable elements. 5mC can be converted to 5-hydroxymethylcytosine (5hmC) by the Tet (ten eleven translocation) proteins. Here, we show that, in addition to 5hmC, the Tet proteins can generate 5-formylcytosine (5fC) and 5-carboxylcytosine (5caC) from 5mC in an enzymatic activity-dependent manner. Furthermore, we reveal the presence of 5fC and 5caC in genomic DNA of mouse embryonic stem cells and mouse organs. The genomic content of 5hmC, 5fC, and 5caC can be increased or reduced through overexpression or depletion of Tet proteins. Thus, we identify two previously unknown cytosine derivatives in genomic DNA as the products of Tet proteins. Our study raises the possibility that DNA demethylation may occur through Tet-catalyzed oxidation followed by decarboxylation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3495246/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3495246/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ito, Shinsuke -- Shen, Li -- Dai, Qing -- Wu, Susan C -- Collins, Leonard B -- Swenberg, James A -- He, Chuan -- Zhang, Yi -- GM071440/GM/NIGMS NIH HHS/ -- GM68804/GM/NIGMS NIH HHS/ -- P30 ES010126/ES/NIEHS NIH HHS/ -- P30 ES010126-11/ES/NIEHS NIH HHS/ -- P30ES10126/ES/NIEHS NIH HHS/ -- P42 ES005948/ES/NIEHS NIH HHS/ -- P42 ES005948-17/ES/NIEHS NIH HHS/ -- P42ES5948/ES/NIEHS NIH HHS/ -- R01 GM068804/GM/NIGMS NIH HHS/ -- U01 DK089565/DK/NIDDK NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2011 Sep 2;333(6047):1300-3. doi: 10.1126/science.1210597. Epub 2011 Jul 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7295, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21778364" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Methylcytosine/*metabolism ; Animals ; Cell Line ; Cytosine/*analogs & derivatives/metabolism ; DNA/*metabolism ; DNA Methylation ; DNA-Binding Proteins/genetics/*metabolism ; Embryonic Stem Cells/metabolism ; Humans ; Mice ; Oxidation-Reduction ; Proto-Oncogene Proteins/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism
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  • 4
    Publication Date: 2011-01-29
    Description: Proper regulation of nuclear factor kappaB (NF-kappaB) transcriptional activity is required for normal lymphocyte function, and deregulated NF-kappaB signaling can facilitate lymphomagenesis. We demonstrate that the API2-MALT1 fusion oncoprotein created by the recurrent t(11;18)(q21;q21) in mucosa-associated lymphoid tissue (MALT) lymphoma induces proteolytic cleavage of NF-kappaB-inducing kinase (NIK) at arginine 325. NIK cleavage requires the concerted actions of both fusion partners and generates a C-terminal NIK fragment that retains kinase activity and is resistant to proteasomal degradation. The resulting deregulated NIK activity is associated with constitutive noncanonical NF-kappaB signaling, enhanced B cell adhesion, and apoptosis resistance. Our study reveals the gain-of-function proteolytic activity of a fusion oncoprotein and highlights the importance of the noncanonical NF-kappaB pathway in B lymphoproliferative disease.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3124150/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3124150/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rosebeck, Shaun -- Madden, Lisa -- Jin, Xiaohong -- Gu, Shufang -- Apel, Ingrid J -- Appert, Alex -- Hamoudi, Rifat A -- Noels, Heidi -- Sagaert, Xavier -- Van Loo, Peter -- Baens, Mathijs -- Du, Ming-Qing -- Lucas, Peter C -- McAllister-Lucas, Linda M -- R01 CA124540/CA/NCI NIH HHS/ -- R01 CA124540-04/CA/NCI NIH HHS/ -- R01 HL082914/HL/NHLBI NIH HHS/ -- R01CA124540/CA/NCI NIH HHS/ -- T32-HD07513/HD/NICHD NIH HHS/ -- T32-HL007622-21A2/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2011 Jan 28;331(6016):468-72. doi: 10.1126/science.1198946.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics and Communicable Diseases, University of Michigan, 1150 West Medical Center Drive, Ann Arbor, MI 48109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21273489" target="_blank"〉PubMed〈/a〉
    Keywords: Apoptosis ; B-Lymphocytes/*metabolism ; Cell Adhesion ; Cell Line ; Cell Line, Tumor ; Gene Expression Regulation, Neoplastic ; Humans ; I-kappa B Kinase/metabolism ; Lymphoma, B-Cell, Marginal Zone/genetics/*metabolism ; NF-kappa B/*metabolism ; NF-kappa B p52 Subunit/metabolism ; Oncogene Proteins, Fusion/chemistry/genetics/*metabolism ; Phosphorylation ; Protein Structure, Tertiary ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Proto-Oncogene Proteins/genetics/metabolism ; Signal Transduction ; Substrate Specificity
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  • 5
    Publication Date: 2011-07-30
    Description: In the auditory epithelium of the cochlea, the sensory hair cells and supporting cells are arranged in a checkerboard-like fashion, but the mechanism underlying this cellular patterning is unclear. We found that mouse hair cells and supporting cells express the immunoglobulin-like adhesion molecules nectin-1 and -3, respectively, and that their interaction mediates the heterotypic adhesion between these two cell types. Genetic removal of nectin-1 or -3 disrupted the checkerboard-like pattern, inducing aberrant attachment between hair cells. When cells expressing either nectin-1 or -3 were cocultured, they arranged themselves into a mosaic pattern. Thus, nectin-1 and -3 promote the formation of the checkerboard-like pattern of the auditory epithelia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Togashi, Hideru -- Kominami, Kanoko -- Waseda, Masazumi -- Komura, Hitomi -- Miyoshi, Jun -- Takeichi, Masatoshi -- Takai, Yoshimi -- New York, N.Y. -- Science. 2011 Aug 26;333(6046):1144-7. doi: 10.1126/science.1208467. Epub 2011 Jul 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Molecular and Cellular Biology, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21798896" target="_blank"〉PubMed〈/a〉
    Keywords: Adherens Junctions/metabolism ; Animals ; *Cell Adhesion ; Cell Adhesion Molecules/genetics/*metabolism ; Cell Differentiation ; Cell Line ; Coculture Techniques ; HEK293 Cells ; Hair Cells, Auditory/*cytology/*metabolism ; Humans ; Mice ; Mice, Knockout ; Organ of Corti/*cytology/*metabolism ; Phenotype ; Protein Binding ; RNA, Messenger/genetics/metabolism
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  • 6
    Publication Date: 2011-05-21
    Description: The transmission of information from DNA to RNA is a critical process. We compared RNA sequences from human B cells of 27 individuals to the corresponding DNA sequences from the same individuals and uncovered more than 10,000 exonic sites where the RNA sequences do not match that of the DNA. All 12 possible categories of discordances were observed. These differences were nonrandom as many sites were found in multiple individuals and in different cell types, including primary skin cells and brain tissues. Using mass spectrometry, we detected peptides that are translated from the discordant RNA sequences and thus do not correspond exactly to the DNA sequences. These widespread RNA-DNA differences in the human transcriptome provide a yet unexplored aspect of genome variation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3204392/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3204392/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Mingyao -- Wang, Isabel X -- Li, Yun -- Bruzel, Alan -- Richards, Allison L -- Toung, Jonathan M -- Cheung, Vivian G -- R01 HG005854/HG/NHGRI NIH HHS/ -- R01 HG005854-01/HG/NHGRI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2011 Jul 1;333(6038):53-8. doi: 10.1126/science.1207018. Epub 2011 May 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biostatistics, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21596952" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; Amino Acid Sequence ; B-Lymphocytes ; Base Sequence ; Cell Line ; Cerebral Cortex/cytology ; DNA/chemistry/*genetics ; Exons ; Expressed Sequence Tags ; Fibroblasts ; Gene Expression Profiling ; *Genetic Variation ; *Genome, Human ; Genotype ; Humans ; Mass Spectrometry ; Middle Aged ; Molecular Sequence Data ; Polymorphism, Single Nucleotide ; Protein Biosynthesis ; Proteins/chemistry ; Proteome/chemistry ; RNA, Messenger/chemistry/*genetics ; Sequence Analysis, DNA ; Sequence Analysis, RNA ; Skin/cytology ; Untranslated Regions
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  • 7
    Publication Date: 2011-03-10
    Description: Many biological processes are regulated through the selective dephosphorylation of proteins. Protein serine-threonine phosphatases are assembled from catalytic subunits bound to diverse regulatory subunits that provide substrate specificity and subcellular localization. We describe a small molecule, guanabenz, that bound to a regulatory subunit of protein phosphatase 1, PPP1R15A/GADD34, selectively disrupting the stress-induced dephosphorylation of the alpha subunit of translation initiation factor 2 (eIF2alpha). Without affecting the related PPP1R15B-phosphatase complex and constitutive protein synthesis, guanabenz prolonged eIF2alpha phosphorylation in human stressed cells, adjusting the protein production rates to levels manageable by available chaperones. This favored protein folding and thereby rescued cells from protein misfolding stress. Thus, regulatory subunits of phosphatases are drug targets, a property used here to restore proteostasis in stressed cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tsaytler, Pavel -- Harding, Heather P -- Ron, David -- Bertolotti, Anne -- 084812/Wellcome Trust/United Kingdom -- MC_U105185860/Medical Research Council/United Kingdom -- Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2011 Apr 1;332(6025):91-4. doi: 10.1126/science.1201396. Epub 2011 Mar 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21385720" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic alpha-2 Receptor Agonists/*pharmacology ; Catalytic Domain/drug effects ; Cell Line ; Clonidine/pharmacology ; Endoplasmic Reticulum/drug effects/metabolism ; Enzyme Inhibitors/*pharmacology ; Eukaryotic Initiation Factor-2/metabolism ; Guanabenz/*pharmacology ; HeLa Cells ; Homeostasis ; Humans ; Molecular Chaperones/metabolism ; Phosphorylation ; Protein Biosynthesis/drug effects ; Protein Folding/drug effects ; Protein Phosphatase 1/*antagonists & inhibitors/metabolism ; Protein Subunits/drug effects/metabolism ; Proteins/metabolism ; Stress, Physiological ; Tunicamycin
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  • 8
    Publication Date: 2011-02-12
    Description: Endocrine tumors such as aldosterone-producing adrenal adenomas (APAs), a cause of severe hypertension, feature constitutive hormone production and unrestrained cell proliferation; the mechanisms linking these events are unknown. We identify two recurrent somatic mutations in and near the selectivity filter of the potassium (K(+)) channel KCNJ5 that are present in 8 of 22 human APAs studied. Both produce increased sodium (Na(+)) conductance and cell depolarization, which in adrenal glomerulosa cells produces calcium (Ca(2+)) entry, the signal for aldosterone production and cell proliferation. Similarly, we identify an inherited KCNJ5 mutation that produces increased Na(+) conductance in a Mendelian form of severe aldosteronism and massive bilateral adrenal hyperplasia. These findings explain pathogenesis in a subset of patients with severe hypertension and implicate loss of K(+) channel selectivity in constitutive cell proliferation and hormone production.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3371087/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3371087/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Choi, Murim -- Scholl, Ute I -- Yue, Peng -- Bjorklund, Peyman -- Zhao, Bixiao -- Nelson-Williams, Carol -- Ji, Weizhen -- Cho, Yoonsang -- Patel, Aniruddh -- Men, Clara J -- Lolis, Elias -- Wisgerhof, Max V -- Geller, David S -- Mane, Shrikant -- Hellman, Per -- Westin, Gunnar -- Akerstrom, Goran -- Wang, Wenhui -- Carling, Tobias -- Lifton, Richard P -- DK54983/DK/NIDDK NIH HHS/ -- K01 AR060300/AR/NIAMS NIH HHS/ -- T32 GM007205/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2011 Feb 11;331(6018):768-72. doi: 10.1126/science.1198785.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06510, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21311022" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Cortex Neoplasms/*genetics/metabolism/pathology ; Adrenal Glands/pathology ; Adrenocortical Adenoma/*genetics/metabolism/pathology ; Aldosterone/*metabolism ; Cell Line ; Cell Proliferation ; Female ; G Protein-Coupled Inwardly-Rectifying Potassium ; Channels/chemistry/*genetics/metabolism ; Humans ; Hyperaldosteronism/*genetics/metabolism/pathology ; Hyperplasia ; Hypertension/*genetics/metabolism ; Male ; Mutant Proteins/chemistry/genetics/metabolism ; *Mutation ; Potassium/metabolism ; Protein Multimerization ; Sodium/metabolism ; Zona Glomerulosa/metabolism/pathology
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  • 9
    Publication Date: 2011-08-06
    Description: Neural circuitry formation depends on the molecular control of axonal projection during development. By screening with fluorophore-assisted light inactivation in the developing mouse brain, we identified cartilage acidic protein-1B as a key molecule for lateral olfactory tract (LOT) formation and named it LOT usher substance (LOTUS). We further identified Nogo receptor-1 (NgR1) as a LOTUS-binding protein. NgR1 is a receptor of myelin-derived axon growth inhibitors, such as Nogo, which prevent neural regeneration in the adult. LOTUS suppressed Nogo-NgR1 binding and Nogo-induced growth cone collapse. A defasciculated LOT was present in lotus-deficient mice but not in mice lacking both lotus- and ngr1. These findings suggest that endogenous antagonism of NgR1 by LOTUS is crucial for normal LOT formation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3244695/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3244695/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sato, Yasufumi -- Iketani, Masumi -- Kurihara, Yuji -- Yamaguchi, Megumi -- Yamashita, Naoya -- Nakamura, Fumio -- Arie, Yuko -- Kawasaki, Takahiko -- Hirata, Tatsumi -- Abe, Takaya -- Kiyonari, Hiroshi -- Strittmatter, Stephen M -- Goshima, Yoshio -- Takei, Kohtaro -- R37 NS033020/NS/NINDS NIH HHS/ -- R37 NS033020-19/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2011 Aug 5;333(6043):769-73. doi: 10.1126/science.1204144.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Pharmacology and Neurobiology, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21817055" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/*physiology ; Binding Sites ; Calcium-Binding Proteins/chemistry/genetics/*metabolism ; Cell Line ; Cells, Cultured ; GPI-Linked Proteins/genetics/metabolism ; Growth Cones/metabolism ; Humans ; Immunohistochemistry ; Ligands ; Mice ; Mice, Inbred ICR ; Myelin Proteins/genetics/*metabolism ; Olfactory Pathways/*cytology/*growth & development/metabolism ; Prosencephalon/embryology/metabolism ; Protein Binding ; Receptors, Cell Surface/genetics/*metabolism ; Signal Transduction
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  • 10
    Publication Date: 2011-11-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaiser, Jocelyn -- New York, N.Y. -- Science. 2011 Nov 25;334(6059):1043. doi: 10.1126/science.334.6059.1043.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22116849" target="_blank"〉PubMed〈/a〉
    Keywords: *Biotechnology/economics/manpower ; California ; Cell Line ; Clinical Trials as Topic ; Embryonic Stem Cells/*cytology ; Humans ; Neural Stem Cells/*transplantation ; Neurogenesis ; Oligodendroglia/*cytology/transplantation ; Spinal Cord Injuries/*therapy ; *Stem Cell Transplantation
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  • 11
    Publication Date: 2011-01-15
    Description: Infection of chickens with avian influenza virus poses a global threat to both poultry production and human health that is not adequately controlled by vaccination or by biosecurity measures. A novel alternative strategy is to develop chickens that are genetically resistant to infection. We generated transgenic chickens expressing a short-hairpin RNA designed to function as a decoy that inhibits and blocks influenza virus polymerase and hence interferes with virus propagation. Susceptibility to primary challenge with highly pathogenic avian influenza virus and onward transmission dynamics were determined. Although the transgenic birds succumbed to the initial experimental challenge, onward transmission to both transgenic and nontransgenic birds was prevented.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lyall, Jon -- Irvine, Richard M -- Sherman, Adrian -- McKinley, Trevelyan J -- Nunez, Alejandro -- Purdie, Auriol -- Outtrim, Linzy -- Brown, Ian H -- Rolleston-Smith, Genevieve -- Sang, Helen -- Tiley, Laurence -- BB/G00479X/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BBS/B/00239/Biotechnology and Biological Sciences Research Council/United Kingdom -- BBS/B/00301/Biotechnology and Biological Sciences Research Council/United Kingdom -- New York, N.Y. -- Science. 2011 Jan 14;331(6014):223-6. doi: 10.1126/science.1198020.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 0ES, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21233391" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Animals, Genetically Modified ; Cell Line ; Chickens/*genetics/virology ; Cloaca/virology ; Influenza A Virus, H5N1 Subtype/enzymology/isolation & purification/*physiology ; Influenza in Birds/*prevention & control/*transmission/virology ; Oropharynx/virology ; RNA Replicase/antagonists & inhibitors/genetics/metabolism ; RNA, Small Interfering/*genetics/metabolism ; RNA, Viral/analysis/genetics/metabolism ; Transfection ; Virus Replication ; Virus Shedding
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  • 12
    Publication Date: 2011-03-26
    Description: Caenorhabditis elegans proteins AFF-1 and EFF-1 [C. elegans fusion family (CeFF) proteins] are essential for developmental cell-to-cell fusion and can merge insect cells. To study the structure and function of AFF-1, we constructed vesicular stomatitis virus (VSV) displaying AFF-1 on the viral envelope, substituting the native fusogen VSV glycoprotein. Electron microscopy and tomography revealed that AFF-1 formed distinct supercomplexes resembling pentameric and hexameric "flowers" on pseudoviruses. Viruses carrying AFF-1 infected mammalian cells only when CeFFs were on the target cell surface. Furthermore, we identified fusion family (FF) proteins within and beyond nematodes, and divergent members from the human parasitic nematode Trichinella spiralis and the chordate Branchiostoma floridae could also fuse mammalian cells. Thus, FF proteins are part of an ancient family of cellular fusogens that can promote fusion when expressed on a viral particle.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3084904/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3084904/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Avinoam, Ori -- Fridman, Karen -- Valansi, Clari -- Abutbul, Inbal -- Zeev-Ben-Mordehai, Tzviya -- Maurer, Ulrike E -- Sapir, Amir -- Danino, Dganit -- Grunewald, Kay -- White, Judith M -- Podbilewicz, Benjamin -- 090532/Wellcome Trust/United Kingdom -- 090895/Wellcome Trust/United Kingdom -- AI22470/AI/NIAID NIH HHS/ -- R01 AI022470/AI/NIAID NIH HHS/ -- R01 AI022470-24/AI/NIAID NIH HHS/ -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2011 Apr 29;332(6029):589-92. doi: 10.1126/science.1202333. Epub 2011 Mar 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Technion-Israel Institute of Technology, Haifa 32000, Israel.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21436398" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Arthropods/chemistry ; Biological Evolution ; Caenorhabditis elegans/chemistry ; Caenorhabditis elegans Proteins/chemistry/genetics/*metabolism/ultrastructure ; *Cell Fusion ; Cell Line ; Cell Membrane/*metabolism ; Chordata, Nonvertebrate/chemistry ; Ctenophora/chemistry ; *Membrane Fusion ; Membrane Glycoproteins/chemistry/genetics/*metabolism ; Molecular Sequence Data ; Naegleria fowleri/chemistry ; Nematoda/chemistry ; Recombinant Proteins/metabolism ; Recombination, Genetic ; Vesicular stomatitis Indiana virus/genetics/*physiology/ultrastructure ; Viral Envelope Proteins/metabolism
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  • 13
    Publication Date: 2011-07-02
    Description: Mucolipidosis II is a severe lysosomal storage disorder caused by defects in the alpha and beta subunits of the hexameric N-acetylglucosamine-1-phosphotransferase complex essential for the formation of the mannose 6-phosphate targeting signal on lysosomal enzymes. Cleavage of the membrane-bound alpha/beta-subunit precursor by an unknown protease is required for catalytic activity. Here we found that the alpha/beta-subunit precursor is cleaved by the site-1 protease (S1P) that activates sterol regulatory element-binding proteins in response to cholesterol deprivation. S1P-deficient cells failed to activate the alpha/beta-subunit precursor and exhibited a mucolipidosis II-like phenotype. Thus, S1P functions in the biogenesis of lysosomes, and lipid-independent phenotypes of S1P deficiency may be caused by lysosomal dysfunction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marschner, Katrin -- Kollmann, Katrin -- Schweizer, Michaela -- Braulke, Thomas -- Pohl, Sandra -- New York, N.Y. -- Science. 2011 Jul 1;333(6038):87-90. doi: 10.1126/science.1205677.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Children's Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21719679" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; CHO Cells ; Cell Line ; Cholesterol/*metabolism ; Chondrocytes/cytology ; Cricetinae ; Cricetulus ; Enzyme Precursors/chemistry/*metabolism ; HeLa Cells ; Humans ; Lipid Metabolism ; Lysosomes/enzymology/*metabolism/ultrastructure ; Mannosephosphates/metabolism ; Mice ; Morphogenesis ; Mucolipidoses/enzymology/genetics/metabolism/pathology ; N-Acetylgalactosamine-4-Sulfatase/metabolism ; Osteogenesis ; Proprotein Convertases/genetics/*metabolism ; Protein Subunits/chemistry/metabolism ; RNA, Small Interfering ; Serine Endopeptidases/genetics/*metabolism ; Transferases (Other Substituted Phosphate Groups)/chemistry/*metabolism
    Print ISSN: 0036-8075
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  • 14
    Publication Date: 2011-10-15
    Description: The HIV envelope (Env) protein gp120 is protected from antibody recognition by a dense glycan shield. However, several of the recently identified PGT broadly neutralizing antibodies appear to interact directly with the HIV glycan coat. Crystal structures of antigen-binding fragments (Fabs) PGT 127 and 128 with Man(9) at 1.65 and 1.29 angstrom resolution, respectively, and glycan binding data delineate a specific high mannose-binding site. Fab PGT 128 complexed with a fully glycosylated gp120 outer domain at 3.25 angstroms reveals that the antibody penetrates the glycan shield and recognizes two conserved glycans as well as a short beta-strand segment of the gp120 V3 loop, accounting for its high binding affinity and broad specificity. Furthermore, our data suggest that the high neutralization potency of PGT 127 and 128 immunoglobulin Gs may be mediated by cross-linking Env trimers on the viral surface.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3280215/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3280215/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pejchal, Robert -- Doores, Katie J -- Walker, Laura M -- Khayat, Reza -- Huang, Po-Ssu -- Wang, Sheng-Kai -- Stanfield, Robyn L -- Julien, Jean-Philippe -- Ramos, Alejandra -- Crispin, Max -- Depetris, Rafael -- Katpally, Umesh -- Marozsan, Andre -- Cupo, Albert -- Maloveste, Sebastien -- Liu, Yan -- McBride, Ryan -- Ito, Yukishige -- Sanders, Rogier W -- Ogohara, Cassandra -- Paulson, James C -- Feizi, Ten -- Scanlan, Christopher N -- Wong, Chi-Huey -- Moore, John P -- Olson, William C -- Ward, Andrew B -- Poignard, Pascal -- Schief, William R -- Burton, Dennis R -- Wilson, Ian A -- AI082362/AI/NIAID NIH HHS/ -- AI33292/AI/NIAID NIH HHS/ -- AI74372/AI/NIAID NIH HHS/ -- AI84817/AI/NIAID NIH HHS/ -- F32 AI074372-03/AI/NIAID NIH HHS/ -- HFE-224662/Canadian Institutes of Health Research/Canada -- P01 AI082362/AI/NIAID NIH HHS/ -- P01 AI082362-03/AI/NIAID NIH HHS/ -- P01 AI082362-04/AI/NIAID NIH HHS/ -- P41RR001209/RR/NCRR NIH HHS/ -- R01 AI033292/AI/NIAID NIH HHS/ -- R01 AI033292-14/AI/NIAID NIH HHS/ -- R01 AI084817/AI/NIAID NIH HHS/ -- R01 AI084817-04/AI/NIAID NIH HHS/ -- RR017573/RR/NCRR NIH HHS/ -- U01 CA128416/CA/NCI NIH HHS/ -- Y1-CO-1020/CO/NCI NIH HHS/ -- Y1-GM-1104/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2011 Nov 25;334(6059):1097-103. doi: 10.1126/science.1213256. Epub 2011 Oct 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Skaggs Institute for Chemical Biology and International AIDS Vaccine Initiative (IAVI) Neutralizing Antibody Center, nhe Scripps Research Institute, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21998254" target="_blank"〉PubMed〈/a〉
    Keywords: Antibodies, Neutralizing/chemistry/genetics/*immunology/metabolism ; Antibody Specificity ; Binding Sites, Antibody ; Carbohydrate Conformation ; Cell Line ; Crystallography, X-Ray ; Disaccharides/chemistry/metabolism ; Epitopes ; Glycosylation ; HIV Antibodies/chemistry/genetics/*immunology/*metabolism ; HIV Envelope Protein gp120/chemistry/*immunology/metabolism ; HIV-1/*immunology/physiology ; Humans ; Hydrogen Bonding ; Immunoglobulin Fab Fragments/chemistry/immunology/metabolism ; Mannose/chemistry/immunology/metabolism ; Mannosides/chemistry/metabolism ; Models, Molecular ; Mutation ; Oligosaccharides/chemistry/*immunology/metabolism ; Polysaccharides/chemistry/*immunology/*metabolism ; Protein Conformation ; Protein Structure, Tertiary
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  • 15
    Publication Date: 2011-07-19
    Description: The chromosomal translocations found in acute myelogenous leukemia (AML) generate oncogenic fusion transcription factors with aberrant transcriptional regulatory properties. Although therapeutic targeting of most leukemia fusion proteins remains elusive, the posttranslational modifications that control their function could be targetable. We found that AML1-ETO, the fusion protein generated by the t(8;21) translocation, is acetylated by the transcriptional coactivator p300 in leukemia cells isolated from t(8;21) AML patients, and that this acetylation is essential for its self-renewal-promoting effects in human cord blood CD34(+) cells and its leukemogenicity in mouse models. Inhibition of p300 abrogates the acetylation of AML1-ETO and impairs its ability to promote leukemic transformation. Thus, lysine acetyltransferases represent a potential therapeutic target in AML.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3251012/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3251012/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Lan -- Gural, Alexander -- Sun, Xiao-Jian -- Zhao, Xinyang -- Perna, Fabiana -- Huang, Gang -- Hatlen, Megan A -- Vu, Ly -- Liu, Fan -- Xu, Haiming -- Asai, Takashi -- Xu, Hao -- Deblasio, Tony -- Menendez, Silvia -- Voza, Francesca -- Jiang, Yanwen -- Cole, Philip A -- Zhang, Jinsong -- Melnick, Ari -- Roeder, Robert G -- Nimer, Stephen D -- GM62437/GM/NIGMS NIH HHS/ -- R01 GM062437/GM/NIGMS NIH HHS/ -- R01 GM062437-12/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2011 Aug 5;333(6043):765-9. doi: 10.1126/science.1201662. Epub 2011 Jul 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Pharmacology and Chemistry Program, Sloan-Kettering Institute, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21764752" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Animals ; Cell Line ; Cell Line, Tumor ; *Cell Transformation, Neoplastic ; Core Binding Factor Alpha 2 Subunit/chemistry/*metabolism ; E1A-Associated p300 Protein/antagonists & inhibitors/*metabolism ; Fetal Blood/cytology ; Gene Expression Profiling ; Hematopoietic Stem Cells/*cytology/physiology ; Humans ; Leukemia, Myeloid, Acute/*metabolism/pathology ; Lysine/*metabolism ; Mice ; Mice, Inbred C57BL ; Mutant Proteins/metabolism ; Oncogene Proteins, Fusion/chemistry/*metabolism ; Preleukemia/metabolism/pathology ; Protein Binding ; Protein Interaction Domains and Motifs ; Protein Processing, Post-Translational ; Transcriptional Activation ; Tumor Cells, Cultured
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  • 16
    Publication Date: 2011-06-18
    Description: Sirtuin 6 (SIRT6) is a mammalian homolog of the yeast Sir2 deacetylase. Mice deficient for SIRT6 exhibit genome instability. Here, we show that in mammalian cells subjected to oxidative stress SIRT6 is recruited to the sites of DNA double-strand breaks (DSBs) and stimulates DSB repair, through both nonhomologous end joining and homologous recombination. Our results indicate that SIRT6 physically associates with poly[adenosine diphosphate (ADP)-ribose] polymerase 1 (PARP1) and mono-ADP-ribosylates PARP1 on lysine residue 521, thereby stimulating PARP1 poly-ADP-ribosylase activity and enhancing DSB repair under oxidative stress.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mao, Zhiyong -- Hine, Christopher -- Tian, Xiao -- Van Meter, Michael -- Au, Matthew -- Vaidya, Amita -- Seluanov, Andrei -- Gorbunova, Vera -- F31 AG041603/AG/NIA NIH HHS/ -- R01 AG027237/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2011 Jun 17;332(6036):1443-6. doi: 10.1126/science.1202723.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of Rochester, Rochester, NY 14627, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21680843" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; DNA/metabolism ; *DNA Breaks, Double-Stranded ; *DNA Repair ; Humans ; Mice ; Mice, Knockout ; *Oxidative Stress ; Paraquat/pharmacology ; Point Mutation ; Poly Adenosine Diphosphate Ribose/metabolism ; Poly(ADP-ribose) Polymerases/genetics/*metabolism ; Recombination, Genetic ; Signal Transduction ; Sirtuins/genetics/*metabolism ; Transfection
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  • 17
    Publication Date: 2011-01-22
    Description: The NLR (nucleotide binding and oligomerization, leucine-rich repeat) family of proteins senses microbial infections and activates the inflammasome, a multiprotein complex that promotes microbial clearance. Kaposi's sarcoma-associated herpesvirus (KSHV) is linked to several human malignancies. We found that KSHV Orf63 is a viral homolog of human NLRP1. Orf63 blocked NLRP1-dependent innate immune responses, including caspase-1 activation and processing of interleukins IL-1beta and IL-18. KSHV Orf63 interacted with NLRP1, NLRP3, and NOD2. Inhibition of Orf63 expression resulted in increased expression of IL-1beta during the KSHV life cycle. Furthermore, inhibition of NLRP1 was necessary for efficient reactivation and generation of progeny virus. The viral homolog subverts the function of cellular NLRs, which suggests that modulation of NLR-mediated innate immunity is important for the lifelong persistence of herpesviruses.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3072027/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3072027/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gregory, Sean M -- Davis, Beckley K -- West, John A -- Taxman, Debra J -- Matsuzawa, Shu-ichi -- Reed, John C -- Ting, Jenny P Y -- Damania, Blossom -- 5R21CA131645/CA/NCI NIH HHS/ -- AI057157/AI/NIAID NIH HHS/ -- AI077437/AI/NIAID NIH HHS/ -- AI56324/AI/NIAID NIH HHS/ -- AI91967/AI/NIAID NIH HHS/ -- CA096500/CA/NCI NIH HHS/ -- CA156330/CA/NCI NIH HHS/ -- DE018281/DE/NIDCR NIH HHS/ -- F32-AI78735/AI/NIAID NIH HHS/ -- R01 AI091967/AI/NIAID NIH HHS/ -- R01 CA096500/CA/NCI NIH HHS/ -- R01 CA096500-10/CA/NCI NIH HHS/ -- R01 DE018281/DE/NIDCR NIH HHS/ -- R01 DE018281-05/DE/NIDCR NIH HHS/ -- T32-AI007001/AI/NIAID NIH HHS/ -- T32-AI007419/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2011 Jan 21;331(6015):330-4. doi: 10.1126/science.1199478.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21252346" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing/*antagonists & ; inhibitors/chemistry/genetics/metabolism ; Amino Acid Sequence ; Apoptosis ; Apoptosis Regulatory Proteins/*antagonists & ; inhibitors/chemistry/genetics/metabolism ; Carrier Proteins/metabolism ; Caspase 1/metabolism ; Caspase Inhibitors ; Cell Line ; Cell Line, Tumor ; Herpesvirus 8, Human/genetics/immunology/*physiology ; Humans ; *Immune Evasion ; *Immunity, Innate ; Inflammasomes/*antagonists & inhibitors/metabolism ; Interleukin-1beta/metabolism ; Molecular Sequence Data ; Monocytes/virology ; Nod2 Signaling Adaptor Protein/metabolism ; Protein Binding ; Protein Interaction Domains and Motifs ; Transfection ; Viral Proteins/chemistry/genetics/*metabolism ; Virus Activation ; Virus Latency ; Virus Replication
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  • 18
    Publication Date: 2011-05-10
    Description: Immune interferon gamma (IFN-gamma) is essential for mammalian host defense against intracellular pathogens. IFN-gamma induces nearly 2000 host genes, yet few have any assigned function. Here, we examined a complete mouse 65-kilodalton (kD) guanylate-binding protein (Gbp) gene family as part of a 43-member IFN-gamma-inducible guanosine triphosphatase (GTPase) superfamily in mouse and human genomes. Family-wide loss-of-function analysis found that at least four Gbps--Gbp1, Gbp6, Gbp7, and Gbp10--conferred cell-autonomous immunity to listerial or mycobacterial infection within macrophages and gene-deficient animals. These Gbps solicited host defense proteins, including the phagocyte oxidase, antimicrobial peptides, and autophagy effectors, to kill intracellular bacteria. Thus, specific 65-kD Gbps coordinate a potent oxidative and vesicular trafficking program to protect the host from infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kim, Bae-Hoon -- Shenoy, Avinash R -- Kumar, Pradeep -- Das, Rituparna -- Tiwari, Sangeeta -- MacMicking, John D -- R01 AI068041-01A1/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2011 May 6;332(6030):717-21. doi: 10.1126/science.1201711.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Microbial Pathogenesis, Boyer Centre for Molecular Medicine, Yale University School of Medicine, New Haven, CT 06510, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21551061" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autophagy ; Cell Line ; GTP-Binding Proteins/chemistry/genetics/*metabolism ; Humans ; Immunity, Innate ; Interferon-gamma/*immunology ; Listeria monocytogenes/growth & development/immunology/pathogenicity ; Listeriosis/*immunology/metabolism/microbiology ; Lysosomes/metabolism ; Macrophages/*immunology/metabolism/*microbiology ; Mice ; Mycobacterium bovis/growth & development/immunology/pathogenicity ; NADPH Oxidase/metabolism ; Oxidation-Reduction ; Peptides/metabolism ; Phagocytosis ; Phagosomes/metabolism ; RNA Interference ; Tuberculosis/*immunology/metabolism/microbiology
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  • 19
    Publication Date: 2011-11-15
    Description: The structure of BPSL1549, a protein of unknown function from Burkholderia pseudomallei, reveals a similarity to Escherichia coli cytotoxic necrotizing factor 1. We found that BPSL1549 acted as a potent cytotoxin against eukaryotic cells and was lethal when administered to mice. Expression levels of bpsl1549 correlate with conditions expected to promote or suppress pathogenicity. BPSL1549 promotes deamidation of glutamine-339 of the translation initiation factor eIF4A, abolishing its helicase activity and inhibiting translation. We propose to name BPSL1549 Burkholderia lethal factor 1.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3364511/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3364511/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cruz-Migoni, Abimael -- Hautbergue, Guillaume M -- Artymiuk, Peter J -- Baker, Patrick J -- Bokori-Brown, Monika -- Chang, Chung-Te -- Dickman, Mark J -- Essex-Lopresti, Angela -- Harding, Sarah V -- Mahadi, Nor Muhammad -- Marshall, Laura E -- Mobbs, George W -- Mohamed, Rahmah -- Nathan, Sheila -- Ngugi, Sarah A -- Ong, Catherine -- Ooi, Wen Fong -- Partridge, Lynda J -- Phillips, Helen L -- Raih, M Firdaus -- Ruzheinikov, Sergei -- Sarkar-Tyson, Mitali -- Sedelnikova, Svetlana E -- Smither, Sophie J -- Tan, Patrick -- Titball, Richard W -- Wilson, Stuart A -- Rice, David W -- 085162/Wellcome Trust/United Kingdom -- BB/D011795/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/D524975/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/E025293/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- WT085162AIA/Wellcome Trust/United Kingdom -- Biotechnology and Biological Sciences Research Council/United Kingdom -- New York, N.Y. -- Science. 2011 Nov 11;334(6057):821-4. doi: 10.1126/science.1211915.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology and Biotechnology, Krebs Institute, University of Sheffield, Sheffield S10 2TN, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22076380" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Animals ; Bacterial Proteins/*chemistry/genetics/metabolism/*toxicity ; Bacterial Toxins/*chemistry/genetics/metabolism/*toxicity ; Burkholderia pseudomallei/*chemistry/*pathogenicity ; Catalytic Domain ; Cell Line ; Crystallography, X-Ray ; Cytotoxins/chemistry/genetics/metabolism/toxicity ; Escherichia coli Proteins/chemistry ; Eukaryotic Initiation Factor-4A/*antagonists & inhibitors/metabolism ; Glutamine/metabolism ; Humans ; Mice ; Mice, Inbred BALB C ; Models, Molecular ; Mutant Proteins/toxicity ; Peptide Chain Initiation, Translational/drug effects ; Protein Binding ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary
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  • 20
    Publication Date: 2011-09-03
    Description: Engineered biological systems that integrate multi-input sensing, sophisticated information processing, and precisely regulated actuation in living cells could be useful in a variety of applications. For example, anticancer therapies could be engineered to detect and respond to complex cellular conditions in individual cells with high specificity. Here, we show a scalable transcriptional/posttranscriptional synthetic regulatory circuit--a cell-type "classifier"--that senses expression levels of a customizable set of endogenous microRNAs and triggers a cellular response only if the expression levels match a predetermined profile of interest. We demonstrate that a HeLa cancer cell classifier selectively identifies HeLa cells and triggers apoptosis without affecting non-HeLa cell types. This approach also provides a general platform for programmed responses to other complex cell states.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xie, Zhen -- Wroblewska, Liliana -- Prochazka, Laura -- Weiss, Ron -- Benenson, Yaakov -- 1R01CA155320-01/CA/NCI NIH HHS/ -- GM068763/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2011 Sep 2;333(6047):1307-11. doi: 10.1126/science.1205527.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Faculty of Arts and Sciences (FAS) Center for Systems Biology, Harvard University, 52 Oxford Street, Cambridge, MA 02138, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21885784" target="_blank"〉PubMed〈/a〉
    Keywords: *Apoptosis ; Biomarkers, Tumor ; Cell Line ; *Gene Expression Regulation, Neoplastic ; *Gene Regulatory Networks ; HeLa Cells ; Humans ; MicroRNAs/*genetics ; *RNA Interference ; Synthetic Biology/methods ; Transfection ; bcl-2-Associated X Protein/genetics
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  • 21
    Publication Date: 2011-01-15
    Description: Upon endoplasmic reticulum (ER) stress, an endoribonuclease, inositol-requiring enzyme-1alpha, splices the precursor unspliced form of X-box-binding protein 1 messenger RNA (XBP1u mRNA) on the ER membrane to yield an active transcription factor (XBP1s), leading to the alleviation of the stress. The nascent peptide encoded by XBP1u mRNA drags the mRNA-ribosome-nascent chain (R-RNC) complex to the membrane for efficient cytoplasmic splicing. We found that translation of the XBP1u mRNA was briefly paused to stabilize the R-RNC complex. Mutational analysis of XBP1u revealed an evolutionarily conserved peptide module at the carboxyl terminus that was responsible for the translational pausing and was required for the efficient targeting and splicing of the XBP1u mRNA. Thus, translational pausing may be used for unexpectedly diverse cellular processes in mammalian cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yanagitani, Kota -- Kimata, Yukio -- Kadokura, Hiroshi -- Kohno, Kenji -- New York, N.Y. -- Science. 2011 Feb 4;331(6017):586-9. doi: 10.1126/science.1197142. Epub 2011 Jan 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular and Cell Genetics, Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5, Takayama, Ikoma, Nara 630-0192, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21233347" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Cytoplasm/*metabolism ; DNA-Binding Proteins/chemistry/*genetics/*metabolism ; Endoplasmic Reticulum/*metabolism ; Endoribonucleases/metabolism ; Humans ; Hydrophobic and Hydrophilic Interactions ; Intracellular Membranes/metabolism ; *Protein Biosynthesis ; Protein-Serine-Threonine Kinases/metabolism ; *RNA Splicing ; RNA, Messenger/*genetics/metabolism ; Recombinant Fusion Proteins/chemistry/metabolism ; Ribosomes/metabolism ; Transcription Factors/chemistry/*genetics/*metabolism
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  • 22
    Publication Date: 2011-04-02
    Description: The carboxy-terminal domain (CTD) of RNA polymerase II (RNAPII) in mammals undergoes extensive posttranslational modification, which is essential for transcriptional initiation and elongation. Here, we show that the CTD of RNAPII is methylated at a single arginine (R1810) by the coactivator-associated arginine methyltransferase 1 (CARM1). Although methylation at R1810 is present on the hyperphosphorylated form of RNAPII in vivo, Ser2 or Ser5 phosphorylation inhibits CARM1 activity toward this site in vitro, suggesting that methylation occurs before transcription initiation. Mutation of R1810 results in the misexpression of a variety of small nuclear RNAs and small nucleolar RNAs, an effect that is also observed in Carm1(-/-) mouse embryo fibroblasts. These results demonstrate that CTD methylation facilitates the expression of select RNAs, perhaps serving to discriminate the RNAPII-associated machinery recruited to distinct gene types.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3773223/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3773223/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sims, Robert J 3rd -- Rojas, Luis Alejandro -- Beck, David -- Bonasio, Roberto -- Schuller, Roland -- Drury, William J 3rd -- Eick, Dirk -- Reinberg, Danny -- F32 GM071166/GM/NIGMS NIH HHS/ -- GM-37120/GM/NIGMS NIH HHS/ -- GM-71166/GM/NIGMS NIH HHS/ -- R01 GM037120/GM/NIGMS NIH HHS/ -- R37 GM037120/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2011 Apr 1;332(6025):99-103. doi: 10.1126/science.1202663.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute (HHMI), Department of Biochemistry, New York University School of Medicine, 522 First Avenue, Smilow 211, New York, NY 10016, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21454787" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arginine/metabolism ; Cell Line ; HeLa Cells ; Humans ; Methylation ; Mice ; Mutation ; Protein Interaction Domains and Motifs ; Protein Structure, Tertiary ; Protein-Arginine N-Methyltransferases/metabolism ; RNA Polymerase II/genetics/*metabolism ; RNA, Small Nuclear/metabolism ; RNA, Small Nucleolar/metabolism ; Recombinant Proteins
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  • 23
    Publication Date: 2011-06-28
    Description: Synthetic biology has advanced the design of genetic devices that can be used to reprogram metabolic activities in mammalian cells. By functionally linking the signal transduction of melanopsin to the control circuit of the nuclear factor of activated T cells, we have designed a synthetic signaling cascade enabling light-inducible transgene expression in different cell lines grown in culture or bioreactors or implanted into mice. In animals harboring intraperitoneal hollow-fiber or subcutaneous implants containing light-inducible transgenic cells, the serum levels of the human glycoprotein secreted alkaline phosphatase could be remote-controlled with fiber optics or transdermally regulated through direct illumination. Light-controlled expression of the glucagon-like peptide 1 was able to attenuate glycemic excursions in type II diabetic mice. Synthetic light-pulse-transcription converters may have applications in therapeutics and protein expression technology.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ye, Haifeng -- Daoud-El Baba, Marie -- Peng, Ren-Wang -- Fussenegger, Martin -- New York, N.Y. -- Science. 2011 Jun 24;332(6037):1565-8. doi: 10.1126/science.1203535.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biosystems Science and Engineering, Eidgenossische Technische Hochschule (ETH) Zurich, Basel, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21700876" target="_blank"〉PubMed〈/a〉
    Keywords: Alkaline Phosphatase/genetics/metabolism ; Animals ; Bioreactors ; Blood Glucose/*metabolism ; Cell Line ; Cell Line, Tumor ; Diabetes Mellitus, Type 2/genetics/*metabolism ; GPI-Linked Proteins/genetics/metabolism ; *Gene Expression Regulation ; Genes, Reporter ; Genetic Engineering/*methods ; Glucagon-Like Peptide 1/genetics/metabolism ; Homeostasis ; Humans ; Insulin/blood ; Isoenzymes/genetics/metabolism ; *Light ; Light Signal Transduction ; Mice ; NFATC Transcription Factors/genetics/metabolism ; Optical Fibers ; Rod Opsins/genetics/metabolism ; Signal Transduction ; Synthetic Biology/*methods ; *Transcription, Genetic ; Transfection ; Transgenes
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  • 24
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2011-03-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Duncan, Melinda K -- EY12221/EY/NEI NIH HHS/ -- EY15279/EY/NEI NIH HHS/ -- R01 EY012221/EY/NEI NIH HHS/ -- R01 EY015279/EY/NEI NIH HHS/ -- RR016472-10/RR/NCRR NIH HHS/ -- RR027273-01/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2011 Mar 25;331(6024):1523-4. doi: 10.1126/science.1204205.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, University of Delaware, Newark, DE 19716, USA. duncanm@udel.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21436425" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cataract/congenital/*genetics ; Cell Line ; Crystallins/genetics/metabolism ; Cytoplasmic Granules/metabolism ; Gene Expression ; *Gene Expression Regulation, Developmental ; Humans ; Lens, Crystalline/cytology/embryology/*metabolism ; Mice ; Mutation ; Protein Biosynthesis ; RNA, Messenger/*genetics/*metabolism ; Ribonucleoproteins/genetics/*metabolism
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  • 25
    Publication Date: 2011-06-11
    Description: The evolutionarily conserved serine-threonine kinase mammalian target of rapamycin (mTOR) plays a critical role in regulating many pathophysiological processes. Functional characterization of the mTOR signaling pathways, however, has been hampered by the paucity of known substrates. We used large-scale quantitative phosphoproteomics experiments to define the signaling networks downstream of mTORC1 and mTORC2. Characterization of one mTORC1 substrate, the growth factor receptor-bound protein 10 (Grb10), showed that mTORC1-mediated phosphorylation stabilized Grb10, leading to feedback inhibition of the phosphatidylinositol 3-kinase (PI3K) and extracellular signal-regulated, mitogen-activated protein kinase (ERK-MAPK) pathways. Grb10 expression is frequently down-regulated in various cancers, and loss of Grb10 and loss of the well-established tumor suppressor phosphatase PTEN appear to be mutually exclusive events, suggesting that Grb10 might be a tumor suppressor regulated by mTORC1.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3195509/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3195509/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yu, Yonghao -- Yoon, Sang-Oh -- Poulogiannis, George -- Yang, Qian -- Ma, Xiaoju Max -- Villen, Judit -- Kubica, Neil -- Hoffman, Gregory R -- Cantley, Lewis C -- Gygi, Steven P -- Blenis, John -- CA46595/CA/NCI NIH HHS/ -- GM051405/GM/NIGMS NIH HHS/ -- HG3456/HG/NHGRI NIH HHS/ -- R00 CA140789/CA/NCI NIH HHS/ -- R00 CA140789-04/CA/NCI NIH HHS/ -- R00CA140789/CA/NCI NIH HHS/ -- R01 GM041890/GM/NIGMS NIH HHS/ -- R01 GM051405/GM/NIGMS NIH HHS/ -- R01 GM051405-14/GM/NIGMS NIH HHS/ -- R01 GM056203/GM/NIGMS NIH HHS/ -- R01 HG003456/HG/NHGRI NIH HHS/ -- R01 HG003456-07/HG/NHGRI NIH HHS/ -- R37 CA046595/CA/NCI NIH HHS/ -- R37 CA046595-22/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2011 Jun 10;332(6035):1322-6. doi: 10.1126/science.1199484.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21659605" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antibiotics, Antineoplastic/pharmacology ; Cell Line ; GRB10 Adaptor Protein/*metabolism ; Humans ; Insulin/*metabolism ; Mice ; Molecular Sequence Data ; Multiprotein Complexes ; Phosphatidylinositol 3-Kinases/metabolism ; Phosphoproteins/metabolism ; Phosphorylation/drug effects ; Proteins/*metabolism ; Proteome/metabolism ; *Signal Transduction/drug effects ; Sirolimus/pharmacology ; TOR Serine-Threonine Kinases
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  • 26
    Publication Date: 2011-04-09
    Description: Small nuclear RNAs (snRNAs) are essential factors in messenger RNA splicing. By means of homozygosity mapping and deep sequencing, we show that a gene encoding U4atac snRNA, a component of the minor U12-dependent spliceosome, is mutated in individuals with microcephalic osteodysplastic primordial dwarfism type I (MOPD I), a severe developmental disorder characterized by extreme intrauterine growth retardation and multiple organ abnormalities. Functional assays showed that mutations (30G〉A, 51G〉A, 55G〉A, and 111G〉A) associated with MOPD I cause defective U12-dependent splicing. Endogenous U12-dependent but not U2-dependent introns were found to be poorly spliced in MOPD I patient fibroblast cells. The introduction of wild-type U4atac snRNA into MOPD I cells enhanced U12-dependent splicing. These results illustrate the critical role of minor intron splicing in human development.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3380448/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3380448/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉He, Huiling -- Liyanarachchi, Sandya -- Akagi, Keiko -- Nagy, Rebecca -- Li, Jingfeng -- Dietrich, Rosemary C -- Li, Wei -- Sebastian, Nikhil -- Wen, Bernard -- Xin, Baozhong -- Singh, Jarnail -- Yan, Pearlly -- Alder, Hansjuerg -- Haan, Eric -- Wieczorek, Dagmar -- Albrecht, Beate -- Puffenberger, Erik -- Wang, Heng -- Westman, Judith A -- Padgett, Richard A -- Symer, David E -- de la Chapelle, Albert -- GM079527/GM/NIGMS NIH HHS/ -- GM093074/GM/NIGMS NIH HHS/ -- P30 CA16058/CA/NCI NIH HHS/ -- R01 GM079527/GM/NIGMS NIH HHS/ -- R01 GM079527-04/GM/NIGMS NIH HHS/ -- R01 GM093074/GM/NIGMS NIH HHS/ -- R01 GM093074-01A1/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2011 Apr 8;332(6026):238-40. doi: 10.1126/science.1200587.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Human Cancer Genetics Program, Ohio State University, Columbus, OH 43210, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21474760" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Chromosomes, Human, Pair 2/genetics ; Dwarfism/genetics/metabolism ; Female ; Fetal Growth Retardation/genetics/metabolism ; Humans ; Introns ; Inverted Repeat Sequences ; Male ; Microcephaly/genetics/metabolism ; *Mutation ; Nucleic Acid Conformation ; Osteochondrodysplasias/genetics/metabolism ; Pedigree ; *RNA Splicing ; RNA, Small Nuclear/chemistry/*genetics/metabolism ; Spliceosomes/*genetics/metabolism
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  • 27
    Publication Date: 2011-01-22
    Description: Intracellular pathogens such as Listeria monocytogenes subvert cellular functions through the interaction of bacterial effectors with host components. Here we found that a secreted listerial virulence factor, LntA, could target the chromatin repressor BAHD1 in the host cell nucleus to activate interferon (IFN)-stimulated genes (ISGs). IFN-lambda expression was induced in response to infection of epithelial cells with bacteria lacking LntA; however, the BAHD1-chromatin associated complex repressed downstream ISGs. In contrast, in cells infected with lntA-expressing bacteria, LntA prevented BAHD1 recruitment to ISGs and stimulated their expression. Murine listeriosis decreased in BAHD1(+/-) mice or when lntA was constitutively expressed. Thus, the LntA-BAHD1 interplay may modulate IFN-lambda-mediated immune response to control bacterial colonization of the host.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lebreton, Alice -- Lakisic, Goran -- Job, Viviana -- Fritsch, Lauriane -- Tham, To Nam -- Camejo, Ana -- Mattei, Pierre-Jean -- Regnault, Beatrice -- Nahori, Marie-Anne -- Cabanes, Didier -- Gautreau, Alexis -- Ait-Si-Ali, Slimane -- Dessen, Andrea -- Cossart, Pascale -- Bierne, Helene -- 233348/European Research Council/International -- New York, N.Y. -- Science. 2011 Mar 11;331(6022):1319-21. doi: 10.1126/science.1200120. Epub 2011 Jan 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut Pasteur, Unite des Interactions Bacteries Cellules, Paris, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21252314" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cell Line ; Cell Line, Tumor ; Cell Nucleus/metabolism ; Chromatin/*metabolism ; Chromosomal Proteins, Non-Histone/*metabolism ; Down-Regulation ; Gene Expression Profiling ; Gene Expression Regulation ; Host-Pathogen Interactions ; Humans ; Interferons/genetics/immunology/*metabolism ; Interleukins/genetics/immunology/*metabolism ; Listeria monocytogenes/genetics/metabolism/*pathogenicity ; Listeriosis/*immunology/microbiology ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Molecular Sequence Data ; Signal Transduction ; Virulence Factors/chemistry/genetics/*metabolism
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  • 28
    Publication Date: 2011-01-06
    Description: Adenosine monophosphate-activated protein kinase (AMPK) is a conserved sensor of intracellular energy activated in response to low nutrient availability and environmental stress. In a screen for conserved substrates of AMPK, we identified ULK1 and ULK2, mammalian orthologs of the yeast protein kinase Atg1, which is required for autophagy. Genetic analysis of AMPK or ULK1 in mammalian liver and Caenorhabditis elegans revealed a requirement for these kinases in autophagy. In mammals, loss of AMPK or ULK1 resulted in aberrant accumulation of the autophagy adaptor p62 and defective mitophagy. Reconstitution of ULK1-deficient cells with a mutant ULK1 that cannot be phosphorylated by AMPK revealed that such phosphorylation is required for mitochondrial homeostasis and cell survival during starvation. These findings uncover a conserved biochemical mechanism coupling nutrient status with autophagy and cell survival.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3030664/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3030664/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Egan, Daniel F -- Shackelford, David B -- Mihaylova, Maria M -- Gelino, Sara -- Kohnz, Rebecca A -- Mair, William -- Vasquez, Debbie S -- Joshi, Aashish -- Gwinn, Dana M -- Taylor, Rebecca -- Asara, John M -- Fitzpatrick, James -- Dillin, Andrew -- Viollet, Benoit -- Kundu, Mondira -- Hansen, Malene -- Shaw, Reuben J -- 1P01CA120964/CA/NCI NIH HHS/ -- 1P01CA120964-01A/CA/NCI NIH HHS/ -- 5P30CA006516-43/CA/NCI NIH HHS/ -- P01 CA120964/CA/NCI NIH HHS/ -- P01 CA120964-05/CA/NCI NIH HHS/ -- P30 CA006516/CA/NCI NIH HHS/ -- P30 CA006516-43/CA/NCI NIH HHS/ -- P30CA014195/CA/NCI NIH HHS/ -- R01 DK080425/DK/NIDDK NIH HHS/ -- R01 DK080425-04/DK/NIDDK NIH HHS/ -- R01 DK080425-05/DK/NIDDK NIH HHS/ -- T32 CA009370/CA/NCI NIH HHS/ -- T32 CA009370-29/CA/NCI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2011 Jan 28;331(6016):456-61. doi: 10.1126/science.1196371. Epub 2010 Dec 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular and Cell Biology Laboratory, Dulbecco Center for Cancer Research, Salk Institute for Biological Studies, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21205641" target="_blank"〉PubMed〈/a〉
    Keywords: AMP-Activated Protein Kinases/*metabolism ; Adaptor Proteins, Signal Transducing/metabolism ; Animals ; *Autophagy ; Caenorhabditis elegans/metabolism ; Caenorhabditis elegans Proteins/genetics/metabolism ; Cell Line ; Cell Line, Tumor ; Cell Survival ; Energy Metabolism ; Hepatocytes/metabolism ; Humans ; Insulin/metabolism ; Intracellular Signaling Peptides and Proteins/chemistry/genetics/*metabolism ; Liver/metabolism ; Metformin/pharmacology ; Mice ; Mitochondria, Liver/metabolism/ultrastructure ; Phenformin/pharmacology ; Phosphorylation ; Protein-Serine-Threonine Kinases/chemistry/genetics/*metabolism ; Signal Transduction ; Transcription Factors/metabolism
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  • 29
    Publication Date: 2011-11-05
    Description: The RNA polymerase II (RNAP II) largest subunit contains a C-terminal domain (CTD) with up to 52 Tyr(1)-Ser(2)-Pro(3)-Thr(4)-Ser(5)-Pro(6)-Ser(7) consensus repeats. Serines 2, 5, and 7 are known to be phosphorylated, and these modifications help to orchestrate the interplay between transcription and processing of messenger RNA (mRNA) precursors. Here, we provide evidence that phosphorylation of CTD Thr(4) residues is required specifically for histone mRNA 3' end processing, functioning to facilitate recruitment of 3' processing factors to histone genes. Like Ser(2), Thr(4) phosphorylation requires the CTD kinase CDK9 and is evolutionarily conserved from yeast to human. Our data thus illustrate how a CTD modification can play a highly specific role in facilitating efficient gene expression.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3678764/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3678764/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hsin, Jing-Ping -- Sheth, Amit -- Manley, James L -- R01 GM028983/GM/NIGMS NIH HHS/ -- R01 GM28983/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2011 Nov 4;334(6056):683-6. doi: 10.1126/science.1206034.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Columbia University, New York, NY 10027, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22053051" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cell Line ; Cell Survival ; Chickens ; Cleavage And Polyadenylation Specificity Factor/metabolism ; Cyclin-Dependent Kinase 9/metabolism ; Histones/*genetics ; Humans ; Molecular Sequence Data ; Nuclear Proteins/metabolism ; Phosphorylation ; *RNA 3' End Processing ; RNA Polymerase II/chemistry/*metabolism ; RNA, Messenger/*metabolism ; Threonine/*metabolism ; mRNA Cleavage and Polyadenylation Factors/metabolism
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  • 30
    Publication Date: 2011-11-05
    Description: The mTOR complex 1 (mTORC1) protein kinase is a master growth regulator that is stimulated by amino acids. Amino acids activate the Rag guanosine triphosphatases (GTPases), which promote the translocation of mTORC1 to the lysosomal surface, the site of mTORC1 activation. We found that the vacuolar H(+)-adenosine triphosphatase ATPase (v-ATPase) is necessary for amino acids to activate mTORC1. The v-ATPase engages in extensive amino acid-sensitive interactions with the Ragulator, a scaffolding complex that anchors the Rag GTPases to the lysosome. In a cell-free system, ATP hydrolysis by the v-ATPase was necessary for amino acids to regulate the v-ATPase-Ragulator interaction and promote mTORC1 translocation. Results obtained in vitro and in human cells suggest that amino acid signaling begins within the lysosomal lumen. These results identify the v-ATPase as a component of the mTOR pathway and delineate a lysosome-associated machinery for amino acid sensing.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3211112/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3211112/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zoncu, Roberto -- Bar-Peled, Liron -- Efeyan, Alejo -- Wang, Shuyu -- Sancak, Yasemin -- Sabatini, David M -- AI47389/AI/NIAID NIH HHS/ -- CA103866/CA/NCI NIH HHS/ -- R01 CA103866/CA/NCI NIH HHS/ -- R01 CA103866-07/CA/NCI NIH HHS/ -- R01 CA103866-08/CA/NCI NIH HHS/ -- R37 AI047389/AI/NIAID NIH HHS/ -- R37 AI047389-11/AI/NIAID NIH HHS/ -- R37 AI047389-12/AI/NIAID NIH HHS/ -- R37 AI047389-13/AI/NIAID NIH HHS/ -- T32 GM007753/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2011 Nov 4;334(6056):678-83. doi: 10.1126/science.1207056.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research, Nine Cambridge Center, Cambridge, MA 02142, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22053050" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids/*metabolism ; Animals ; Cell Line ; Drosophila ; GTP Phosphohydrolases/metabolism ; Humans ; Lysosomes/*metabolism ; Multiprotein Complexes ; Proteins/*metabolism ; RNA Interference ; Signal Transduction ; TOR Serine-Threonine Kinases ; Vacuolar Proton-Translocating ATPases/*metabolism
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  • 31
    Publication Date: 2011-06-11
    Description: The mammalian target of rapamycin (mTOR) protein kinase is a master growth promoter that nucleates two complexes, mTORC1 and mTORC2. Despite the diverse processes controlled by mTOR, few substrates are known. We defined the mTOR-regulated phosphoproteome by quantitative mass spectrometry and characterized the primary sequence motif specificity of mTOR using positional scanning peptide libraries. We found that the phosphorylation response to insulin is largely mTOR dependent and that mTOR exhibits a unique preference for proline, hydrophobic, and aromatic residues at the +1 position. The adaptor protein Grb10 was identified as an mTORC1 substrate that mediates the inhibition of phosphoinositide 3-kinase typical of cells lacking tuberous sclerosis complex 2 (TSC2), a tumor suppressor and negative regulator of mTORC1. Our work clarifies how mTORC1 inhibits growth factor signaling and opens new areas of investigation in mTOR biology.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3177140/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3177140/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hsu, Peggy P -- Kang, Seong A -- Rameseder, Jonathan -- Zhang, Yi -- Ottina, Kathleen A -- Lim, Daniel -- Peterson, Timothy R -- Choi, Yongmun -- Gray, Nathanael S -- Yaffe, Michael B -- Marto, Jarrod A -- Sabatini, David M -- AI47389/AI/NIAID NIH HHS/ -- CA103866/CA/NCI NIH HHS/ -- CA112967/CA/NCI NIH HHS/ -- ES015339/ES/NIEHS NIH HHS/ -- GM68762/GM/NIGMS NIH HHS/ -- R01 CA103866/CA/NCI NIH HHS/ -- R01 CA103866-09/CA/NCI NIH HHS/ -- R01 CA129105/CA/NCI NIH HHS/ -- R01 CA129105-05/CA/NCI NIH HHS/ -- R37 AI047389/AI/NIAID NIH HHS/ -- T32 GM007753/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2011 Jun 10;332(6035):1317-22. doi: 10.1126/science.1199498.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research, Nine Cambridge Center, Cambridge, MA 02142, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21659604" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; GRB10 Adaptor Protein/*metabolism ; Humans ; Insulin/metabolism ; Intercellular Signaling Peptides and Proteins/*metabolism ; Mass Spectrometry ; Mice ; Multiprotein Complexes ; Naphthyridines/pharmacology ; Phosphoproteins/metabolism ; Phosphorylation ; Proteins/*metabolism ; Proteome/metabolism ; *Signal Transduction ; Sirolimus/pharmacology ; TOR Serine-Threonine Kinases/*metabolism
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  • 32
    Publication Date: 2011-10-01
    Description: Various types of chromosomal aberrations, including numerical (aneuploidy) and structural (e.g., translocations, deletions), are commonly found in human tumors and are linked to tumorigenesis. Aneuploidy is a direct consequence of chromosome segregation errors in mitosis, whereas structural aberrations are caused by improperly repaired DNA breaks. Here, we demonstrate that chromosome segregation errors can also result in structural chromosome aberrations. Chromosomes that missegregate are frequently damaged during cytokinesis, triggering a DNA double-strand break response in the respective daughter cells involving ATM, Chk2, and p53. We show that these double-strand breaks can lead to unbalanced translocations in the daughter cells. Our data show that segregation errors can cause translocations and provide insights into the role of whole-chromosome instability in tumorigenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Janssen, Aniek -- van der Burg, Marja -- Szuhai, Karoly -- Kops, Geert J P L -- Medema, Rene H -- 242617/European Research Council/International -- New York, N.Y. -- Science. 2011 Sep 30;333(6051):1895-8. doi: 10.1126/science.1210214.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medical Oncology and Cancer Genomics Center, University Medical Center Utrecht, Universiteitsweg 100, 3584 CG, Utrecht, Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21960636" target="_blank"〉PubMed〈/a〉
    Keywords: Ataxia Telangiectasia Mutated Proteins ; Cell Cycle Proteins/antagonists & inhibitors/metabolism ; Cell Line ; Cell Line, Tumor ; Checkpoint Kinase 2 ; *Chromosomal Instability ; *Chromosome Aberrations ; *Chromosome Segregation ; Cytokinesis ; *DNA Breaks, Double-Stranded ; DNA-Binding Proteins/metabolism ; Histones/metabolism ; Humans ; Intracellular Signaling Peptides and Proteins/metabolism ; Neoplasms/*genetics ; Phosphorylation ; Protein Kinase Inhibitors/pharmacology ; Protein-Serine-Threonine Kinases/antagonists & inhibitors/metabolism ; Protein-Tyrosine Kinases ; Pyrimidines/pharmacology ; Thiones/pharmacology ; *Translocation, Genetic ; Tumor Suppressor Protein p53/metabolism ; Tumor Suppressor Proteins/metabolism
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  • 33
    Publication Date: 2011-11-05
    Description: Control of intracellular reactive oxygen species (ROS) concentrations is critical for cancer cell survival. We show that, in human lung cancer cells, acute increases in intracellular concentrations of ROS caused inhibition of the glycolytic enzyme pyruvate kinase M2 (PKM2) through oxidation of Cys(358). This inhibition of PKM2 is required to divert glucose flux into the pentose phosphate pathway and thereby generate sufficient reducing potential for detoxification of ROS. Lung cancer cells in which endogenous PKM2 was replaced with the Cys(358) to Ser(358) oxidation-resistant mutant exhibited increased sensitivity to oxidative stress and impaired tumor formation in a xenograft model. Besides promoting metabolic changes required for proliferation, the regulatory properties of PKM2 may confer an additional advantage to cancer cells by allowing them to withstand oxidative stress.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3471535/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3471535/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Anastasiou, Dimitrios -- Poulogiannis, George -- Asara, John M -- Boxer, Matthew B -- Jiang, Jian-kang -- Shen, Min -- Bellinger, Gary -- Sasaki, Atsuo T -- Locasale, Jason W -- Auld, Douglas S -- Thomas, Craig J -- Vander Heiden, Matthew G -- Cantley, Lewis C -- 1P30CA147882/CA/NCI NIH HHS/ -- P01 CA089021/CA/NCI NIH HHS/ -- P01 CA117969/CA/NCI NIH HHS/ -- P01-CA089021/CA/NCI NIH HHS/ -- P01-CA117969-04/CA/NCI NIH HHS/ -- R01 GM056203/GM/NIGMS NIH HHS/ -- R01-GM056203-13/GM/NIGMS NIH HHS/ -- R03MH085679/MH/NIMH NIH HHS/ -- Intramural NIH HHS/ -- New York, N.Y. -- Science. 2011 Dec 2;334(6060):1278-83. doi: 10.1126/science.1211485. Epub 2011 Nov 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Beth Israel Deaconess Medical Center, Department of Medicine-Division of Signal Transduction, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22052977" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcysteine/pharmacology ; Amino Acid Substitution ; Animals ; Antioxidants/*metabolism ; Cell Line ; Cell Line, Tumor ; Cell Survival ; Cysteine/chemistry ; Diamide/pharmacology ; Enzyme Activators/pharmacology ; Glucose/metabolism ; Glutathione/metabolism ; Humans ; Mice ; Mice, Nude ; Mutant Proteins/antagonists & inhibitors/chemistry/genetics/metabolism ; Neoplasm Transplantation ; Neoplasms, Experimental/metabolism/pathology ; Oxidation-Reduction ; Oxidative Stress ; Pentose Phosphate Pathway ; Protein Subunits ; Pyruvate Kinase/*antagonists & inhibitors/chemistry/genetics/metabolism ; Reactive Oxygen Species/*metabolism ; Transplantation, Heterologous
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  • 34
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2011-10-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, Gretchen -- New York, N.Y. -- Science. 2011 Oct 7;334(6052):26-7. doi: 10.1126/science.334.6052.26.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21980084" target="_blank"〉PubMed〈/a〉
    Keywords: Blastocyst ; Cell Line ; *Cellular Reprogramming ; Cloning, Organism ; Embryonic Stem Cells ; Female ; Gene Expression ; Humans ; Induced Pluripotent Stem Cells ; Male ; Nuclear Transfer Techniques ; Oocytes ; *Pluripotent Stem Cells/cytology/physiology
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  • 35
    Publication Date: 2011-04-30
    Description: Viperin is an interferon-inducible protein that is directly induced in cells by human cytomegalovirus (HCMV) infection. Why HCMV would induce viperin, which has antiviral activity, is unknown. We show that HCMV-induced viperin disrupts cellular metabolism to enhance the infectious process. Viperin interaction with the viral protein vMIA resulted in viperin relocalization from the endoplasmic reticulum to the mitochondria. There, viperin interacted with the mitochondrial trifunctional protein that mediates beta-oxidation of fatty acids to generate adenosine triphosphate (ATP). This interaction with viperin, but not with a mutant lacking the viperin iron-sulfur cluster-binding motif, reduced cellular ATP generation, which resulted in actin cytoskeleton disruption and enhancement of infection. This function of viperin, which was previously attributed to vMIA, suggests that HCMV has coopted viperin to facilitate the infectious process.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Seo, Jun-Young -- Yaneva, Rakina -- Hinson, Ella R -- Cresswell, Peter -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2011 May 27;332(6033):1093-7. doi: 10.1126/science.1202007. Epub 2011 Apr 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunobiology, Howard Hughes Medical Institute, Yale University School of Medicine, 300 Cedar Street, New Haven, CT 06520-8011, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21527675" target="_blank"〉PubMed〈/a〉
    Keywords: Actin Cytoskeleton/metabolism/ultrastructure ; Adenosine Triphosphate/metabolism ; Animals ; COS Cells ; Cell Line ; Cells, Cultured ; Cercopithecus aethiops ; Cytomegalovirus/*metabolism/*pathogenicity ; Endoplasmic Reticulum/metabolism ; Fatty Acids/metabolism ; Glycolysis ; Humans ; Hydrogen-Ion Concentration ; Immediate-Early Proteins/*metabolism ; Mice ; Mice, Knockout ; Mitochondria/metabolism ; Mitochondrial Trifunctional Protein ; Multienzyme Complexes/metabolism ; Oxidation-Reduction ; Proteins/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Stress Fibers/ultrastructure ; Transfection ; Virus Replication
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  • 36
    Publication Date: 2011-09-24
    Description: Murine leukemia viruses (MLVs), including xenotropic-MLV-related virus (XMRV), have been controversially linked to chronic fatigue syndrome (CFS). To explore this issue in greater depth, we compiled coded replicate samples of blood from 15 subjects previously reported to be XMRV/MLV-positive (14 with CFS) and from 15 healthy donors previously determined to be negative for the viruses. These samples were distributed in a blinded fashion to nine laboratories, which performed assays designed to detect XMRV/MLV nucleic acid, virus replication, and antibody. Only two laboratories reported evidence of XMRV/MLVs; however, replicate sample results showed disagreement, and reactivity was similar among CFS subjects and negative controls. These results indicate that current assays do not reproducibly detect XMRV/MLV in blood samples and that blood donor screening is not warranted.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3299483/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3299483/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Simmons, Graham -- Glynn, Simone A -- Komaroff, Anthony L -- Mikovits, Judy A -- Tobler, Leslie H -- Hackett, John Jr -- Tang, Ning -- Switzer, William M -- Heneine, Walid -- Hewlett, Indira K -- Zhao, Jiangqin -- Lo, Shyh-Ching -- Alter, Harvey J -- Linnen, Jeffrey M -- Gao, Kui -- Coffin, John M -- Kearney, Mary F -- Ruscetti, Francis W -- Pfost, Max A -- Bethel, James -- Kleinman, Steven -- Holmberg, Jerry A -- Busch, Michael P -- Blood XMRV Scientific Research Working Group (SRWG) -- N01 HB-57181/HB/NHLBI NIH HHS/ -- N01HB57181/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2011 Nov 11;334(6057):814-7. doi: 10.1126/science.1213841. Epub 2011 Sep 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Blood Systems Research Institute and University of California, San Francisco, San Francisco, CA 94118, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21940862" target="_blank"〉PubMed〈/a〉
    Keywords: Antibodies, Viral/blood ; Blood/*virology ; Blood Specimen Collection ; Cell Line ; Coculture Techniques ; False Positive Reactions ; Fatigue Syndrome, Chronic/*virology ; Female ; Humans ; Laboratories ; Male ; Polymerase Chain Reaction ; Reproducibility of Results ; Retroviridae Infections/virology ; Reverse Transcriptase Polymerase Chain Reaction ; Sensitivity and Specificity ; Viremia ; Virus Replication ; Xenotropic murine leukemia virus-related virus/genetics/immunology/*isolation & ; purification/physiology
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  • 37
    Publication Date: 2011-11-05
    Description: CENH3 is a centromere-specific histone H3 variant essential for kinetochore assembly. Despite its central role in centromere function, there has been no conclusive evidence supporting CENH3 as sufficient to determine centromere identity. To address this question, we artificially targeted Drosophila CENH3 (CENP-A/CID) as a CID-GFP-LacI fusion protein to stably integrated lac operator (lacO) arrays. This ectopic CID focus assembles a functional kinetochore and directs incorporation of CID molecules without the LacI-anchor, providing evidence for the self-propagation of the epigenetic mark. CID-GFP-LacI-bound extrachromosomal lacO plasmids can assemble kinetochore proteins and bind microtubules, resulting in their stable transmission for several cell generations even after eliminating CID-GFP-LacI. We conclude that CID is both necessary and sufficient to serve as an epigenetic centromere mark and nucleate heritable centromere function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mendiburo, Maria Jose -- Padeken, Jan -- Fulop, Stefanie -- Schepers, Aloys -- Heun, Patrick -- New York, N.Y. -- Science. 2011 Nov 4;334(6056):686-90. doi: 10.1126/science.1206880.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max Planck Institute of Immunobiology, Stubeweg 51, 79108 Freiburg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22053052" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Centromere/*physiology ; DNA-Binding Proteins ; Drosophila/*genetics ; Drosophila Proteins ; Epigenesis, Genetic ; Histones/*physiology ; Kinetochores/physiology ; Recombinant Fusion Proteins
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  • 38
    Publication Date: 2011-03-26
    Description: The precise transcriptional regulation of gene expression is essential for vertebrate development, but the role of posttranscriptional regulatory mechanisms is less clear. Cytoplasmic RNA granules (RGs) function in the posttranscriptional control of gene expression, but the extent of RG involvement in organogenesis is unknown. We describe two human cases of pediatric cataract with loss-of-function mutations in TDRD7 and demonstrate that Tdrd7 nullizygosity in mouse causes cataracts, as well as glaucoma and an arrest in spermatogenesis. TDRD7 is a Tudor domain RNA binding protein that is expressed in lens fiber cells in distinct TDRD7-RGs that interact with STAU1-ribonucleoproteins (RNPs). TDRD7 coimmunoprecipitates with specific lens messenger RNAs (mRNAs) and is required for the posttranscriptional control of mRNAs that are critical to normal lens development and to RG function. These findings demonstrate a role for RGs in vertebrate organogenesis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3279122/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3279122/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lachke, Salil A -- Alkuraya, Fowzan S -- Kneeland, Stephen C -- Ohn, Takbum -- Aboukhalil, Anton -- Howell, Gareth R -- Saadi, Irfan -- Cavallesco, Resy -- Yue, Yingzi -- Tsai, Anne C-H -- Nair, K Saidas -- Cosma, Mihai I -- Smith, Richard S -- Hodges, Emily -- Alfadhli, Suad M -- Al-Hajeri, Amal -- Shamseldin, Hanan E -- Behbehani, Abdulmutalib -- Hannon, Gregory J -- Bulyk, Martha L -- Drack, Arlene V -- Anderson, Paul J -- John, Simon W M -- Maas, Richard L -- P01 GM061354/GM/NIGMS NIH HHS/ -- P01 GM061354-07/GM/NIGMS NIH HHS/ -- R01 EY010123/EY/NEI NIH HHS/ -- R01 EY010123-15/EY/NEI NIH HHS/ -- R01 EY011721/EY/NEI NIH HHS/ -- R01 EY011721-15/EY/NEI NIH HHS/ -- R01 EY10123/EY/NEI NIH HHS/ -- R01 EY11721/EY/NEI NIH HHS/ -- R01 HD060050/HD/NICHD NIH HHS/ -- R01 HD060050-04/HD/NICHD NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2011 Mar 25;331(6024):1571-6. doi: 10.1126/science.1195970.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21436445" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cataract/congenital/*genetics/pathology ; Cell Line ; Chick Embryo ; Crystallins/genetics/metabolism ; Cytoplasmic Granules/metabolism ; Embryonic Development ; Female ; *Gene Expression Regulation, Developmental ; Gene Knockdown Techniques ; Glaucoma/*genetics ; Humans ; Hypospadias/genetics ; Lens, Crystalline/embryology/*metabolism ; Male ; Mice ; Mutation ; Organogenesis ; Protein Biosynthesis ; RNA, Messenger/*genetics/*metabolism ; RNA-Binding Proteins/genetics/metabolism ; Ribonucleoproteins/genetics/*metabolism ; Spermatogenesis/genetics
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  • 39
    Publication Date: 2011-10-25
    Description: Inhibitor of apoptosis (IAP) proteins are negative regulators of cell death. IAP family members contain RING domains that impart E3 ubiquitin ligase activity. Binding of endogenous or small-molecule antagonists to select baculovirus IAP repeat (BIR) domains within cellular IAP (cIAP) proteins promotes autoubiquitination and proteasomal degradation and so releases inhibition of apoptosis mediated by cIAP. Although the molecular details of antagonist-BIR domain interactions are well understood, it is not clear how this binding event influences the activity of the RING domain. Here biochemical and structural studies reveal that the unliganded, multidomain cIAP1 sequesters the RING domain within a compact, monomeric structure that prevents RING dimerization. Antagonist binding induces conformational rearrangements that enable RING dimerization and formation of the active E3 ligase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dueber, Erin C -- Schoeffler, Allyn J -- Lingel, Andreas -- Elliott, J Michael -- Fedorova, Anna V -- Giannetti, Anthony M -- Zobel, Kerry -- Maurer, Brigitte -- Varfolomeev, Eugene -- Wu, Ping -- Wallweber, Heidi J A -- Hymowitz, Sarah G -- Deshayes, Kurt -- Vucic, Domagoj -- Fairbrother, Wayne J -- P41RR001209/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2011 Oct 21;334(6054):376-80. doi: 10.1126/science.1207862.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Early Discovery Biochemistry, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22021857" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cell Line ; Cell Line, Tumor ; Cloning, Molecular ; Humans ; Hydrophobic and Hydrophilic Interactions ; Inhibitor of Apoptosis Proteins/*antagonists & inhibitors/*chemistry/metabolism ; Mice ; Models, Biological ; Models, Molecular ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; Proteasome Endopeptidase Complex/metabolism ; Protein Conformation ; Protein Interaction Domains and Motifs ; Protein Multimerization ; Protein Structure, Secondary ; Scattering, Small Angle ; Ubiquitin-Protein Ligases/chemistry/metabolism ; Ubiquitinated Proteins/chemistry/metabolism ; Ubiquitination
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  • 40
    Publication Date: 2011-08-20
    Description: Most cancer cells are characterized by aneuploidy, an abnormal number of chromosomes. We have identified a clue to the mechanistic origins of aneuploidy through integrative genomic analyses of human tumors. A diverse range of tumor types were found to harbor deletions or inactivating mutations of STAG2, a gene encoding a subunit of the cohesin complex, which regulates the separation of sister chromatids during cell division. Because STAG2 is on the X chromosome, its inactivation requires only a single mutational event. Studying a near-diploid human cell line with a stable karyotype, we found that targeted inactivation of STAG2 led to chromatid cohesion defects and aneuploidy, whereas in two aneuploid human glioblastoma cell lines, targeted correction of the endogenous mutant alleles of STAG2 led to enhanced chromosomal stability. Thus, genetic disruption of cohesin is a cause of aneuploidy in human cancer.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3374335/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3374335/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Solomon, David A -- Kim, Taeyeon -- Diaz-Martinez, Laura A -- Fair, Joshlean -- Elkahloun, Abdel G -- Harris, Brent T -- Toretsky, Jeffrey A -- Rosenberg, Steven A -- Shukla, Neerav -- Ladanyi, Marc -- Samuels, Yardena -- James, C David -- Yu, Hongtao -- Kim, Jung-Sik -- Waldman, Todd -- CA097257/CA/NCI NIH HHS/ -- R01 CA133662/CA/NCI NIH HHS/ -- R01 CA138212/CA/NCI NIH HHS/ -- R01 CA169345/CA/NCI NIH HHS/ -- R01CA115699/CA/NCI NIH HHS/ -- R21CA143282/CA/NCI NIH HHS/ -- Z01 HG200337-01/Intramural NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2011 Aug 19;333(6045):1039-43. doi: 10.1126/science.1203619.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University School of Medicine, Washington, DC 20057, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21852505" target="_blank"〉PubMed〈/a〉
    Keywords: *Aneuploidy ; Antigens, Nuclear/*genetics/*physiology ; Cell Cycle ; Cell Line ; Cell Line, Tumor ; Chromatids/physiology ; *Chromosomal Instability ; Chromosomes, Human, X/genetics ; Female ; Gene Deletion ; Gene Expression Profiling ; Gene Expression Regulation, Neoplastic ; Gene Silencing ; Gene Targeting ; Glioblastoma/*genetics ; Humans ; Karyotyping ; Male ; Melanoma/genetics ; Mutation ; Neoplasms/*genetics ; Polymorphism, Single Nucleotide ; Sarcoma, Ewing/genetics
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  • 41
    Publication Date: 2011-08-06
    Description: The prevalent DNA modification in higher organisms is the methylation of cytosine to 5-methylcytosine (5mC), which is partially converted to 5-hydroxymethylcytosine (5hmC) by the Tet (ten eleven translocation) family of dioxygenases. Despite their importance in epigenetic regulation, it is unclear how these cytosine modifications are reversed. Here, we demonstrate that 5mC and 5hmC in DNA are oxidized to 5-carboxylcytosine (5caC) by Tet dioxygenases in vitro and in cultured cells. 5caC is specifically recognized and excised by thymine-DNA glycosylase (TDG). Depletion of TDG in mouse embyronic stem cells leads to accumulation of 5caC to a readily detectable level. These data suggest that oxidation of 5mC by Tet proteins followed by TDG-mediated base excision of 5caC constitutes a pathway for active DNA demethylation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3462231/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3462231/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉He, Yu-Fei -- Li, Bin-Zhong -- Li, Zheng -- Liu, Peng -- Wang, Yang -- Tang, Qingyu -- Ding, Jianping -- Jia, Yingying -- Chen, Zhangcheng -- Li, Lin -- Sun, Yan -- Li, Xiuxue -- Dai, Qing -- Song, Chun-Xiao -- Zhang, Kangling -- He, Chuan -- Xu, Guo-Liang -- 1S10RR027643-01/RR/NCRR NIH HHS/ -- GM071440/GM/NIGMS NIH HHS/ -- R01 GM071440/GM/NIGMS NIH HHS/ -- S10 RR027643/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2011 Sep 2;333(6047):1303-7. doi: 10.1126/science.1210944. Epub 2011 Aug 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Group of DNA Metabolism, State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai 200031, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21817016" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Methylcytosine/metabolism ; Animals ; Cell Line ; Cytosine/*analogs & derivatives/metabolism ; DNA/*metabolism ; DNA Methylation ; DNA-Binding Proteins/genetics/*metabolism ; Embryonic Stem Cells ; HEK293 Cells ; Humans ; Induced Pluripotent Stem Cells/metabolism ; Mice ; Oxidation-Reduction ; Proto-Oncogene Proteins/genetics/*metabolism ; RNA, Small Interfering ; Thymine DNA Glycosylase/genetics/*metabolism ; Transfection
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  • 42
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-03-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barnes, D M -- New York, N.Y. -- Science. 1987 Mar 27;235(4796):1574-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3103218" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*complications/drug therapy ; Antigens, Differentiation, T-Lymphocyte ; Antigens, Surface/analysis ; Cell Line ; Cell Transformation, Viral ; Encephalitis/*etiology/microbiology ; Glioma/microbiology ; Histocytochemistry ; Humans ; Macrophages/microbiology ; Membrane Proteins ; Microscopy, Electron ; Neuroglia/microbiology ; T-Lymphocytes/microbiology ; Thymidine/analogs & derivatives/therapeutic use ; Viral Proteins/analysis ; Zidovudine
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  • 43
    Publication Date: 1987-03-20
    Description: Elevation of glucose transport is an alteration common to most virally induced tumors. Rat fibroblasts transformed with wild-type or a temperature-sensitive Fujinami sarcoma virus (FSV) were studied in order to determine the mechanisms underlying the increased transport. Five- to tenfold increases in total cellular glucose transporter protein in response to transformation were accompanied by similar increases in transporter messenger RNA levels. This, in turn, was preceded by an absolute increase in the rate of glucose transporter gene transcription within 30 minutes after shift of the temperature-sensitive FSV-transformed cells to the permissive temperature. The transporter messenger RNA levels in transformed fibroblasts were higher than those found in proliferating cells maintained at the nonpermissive temperature. The activation of transporter gene transcription by transformation represents one of the earliest known effects of oncogenesis on the expression of a gene encoding a protein of well-defined function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Birnbaum, M J -- Haspel, H C -- Rosen, O M -- AM35430-01/AM/NIADDK NIH HHS/ -- DK 35158/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1987 Mar 20;235(4795):1495-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3029870" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avian Sarcoma Viruses ; Cell Division ; Cell Line ; *Cell Transformation, Viral ; Fibroblasts ; Gene Expression Regulation ; Kinetics ; Monosaccharide Transport Proteins/*genetics ; RNA, Messenger/genetics ; Rats ; Transcription, Genetic
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  • 44
    Publication Date: 1987-07-10
    Description: A wide variety of human tumors contain an amplified or overexpressed erbB-2 gene, which encodes a growth factor receptor-like protein. When erbB-2 complementary DNA was expressed in NIH/3T3 cells under the control of the SV40 promoter, the gene lacked transforming activity despite expression of detectable levels of the erbB-2 protein. A further five- to tenfold increase in its expression under influence of the long terminal repeat of Moloney murine leukemia virus was associated with activation of erbB-2 as a potent oncogene. The high levels of the erbB-2 product associated with malignant transformation of NIH/3T3 cells were observed in human mammary tumor cells that overexpressed this gene. These findings demonstrate a new mechanism for acquisition of oncogenic properties by genes encoding growth factor receptor-like proteins and provide a functional basis for the role of their overexpression in the development of human malignancies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Di Fiore, P P -- Pierce, J H -- Kraus, M H -- Segatto, O -- King, C R -- Aaronson, S A -- New York, N.Y. -- Science. 1987 Jul 10;237(4811):178-82.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2885917" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Breast Neoplasms/genetics ; Cell Line ; *Cell Transformation, Neoplastic/genetics ; DNA/genetics ; Fibroblasts/*metabolism ; Gene Expression Regulation ; Genes, Viral ; Humans ; Mice ; Moloney murine leukemia virus/genetics ; Promoter Regions, Genetic ; Proto-Oncogene Proteins/biosynthesis/genetics/*physiology ; Rats ; Receptor, Epidermal Growth Factor ; Receptor, ErbB-2 ; Receptors, Cell Surface/genetics ; Recombinant Fusion Proteins/biosynthesis/genetics/physiology ; Simian virus 40/genetics ; Tumor Stem Cell Assay
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  • 45
    Publication Date: 1987-11-06
    Description: A model system for cytokine-induced up-regulation of human immunodeficiency virus type 1 (HIV-1) expression in chronically infected promonocyte clones was established. The parent promonocyte cell line U937 was chronically infected with HIV-1 and from this line a clone, U1, was derived. U1 showed minimal constitutive expression of HIV-1, but virus expression was markedly up-regulated by a phytohemagglutinin-induced supernatant containing multiple cytokines and by recombinant granulocyte/macrophage colony-stimulating factor alone. Recombinant interleukin-1 (IL-1), IL-2, interferon-gamma, and tumor necrosis factor-alpha did not up-regulate virus expression. Concomitant with the cytokine-induced up-regulation of HIV-1, expression of membrane-bound IL-1 beta was selectively induced in U1 in the absence of induction of other surface membrane proteins. This cytokine up-regulation of IL-1 beta was not seen in the uninfected parent U937 cell line. These studies have implications for the understanding of the mechanism of progression from a latent or low-level HIV-1 infection to a productive infection with resulting immunosuppression. In addition, this model can be used to delineate the potential mechanisms whereby HIV-1 infection regulates cellular gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Folks, T M -- Justement, J -- Kinter, A -- Dinarello, C A -- Fauci, A S -- New York, N.Y. -- Science. 1987 Nov 6;238(4828):800-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3313729" target="_blank"〉PubMed〈/a〉
    Keywords: Biological Products/*pharmacology ; Cell Line ; Clone Cells ; Cytokines ; HIV/drug effects/genetics/*growth & development ; Monocytes ; Recombinant Proteins/pharmacology
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  • 46
    Publication Date: 1987-04-17
    Description: Many mutations leading to human disease are the result of single DNA base pair changes that cannot be identified by Southern analysis. This has prompted the development of alternative assays for point mutation detection. The recently described ribonuclease A cleavage procedure, with a polyuridylic acid-paper affinity chromatography step, has been used to identify the mutational lesions in the hypoxanthine phosphoribosyltransferase (HPRT) messenger RNAs of patients with Lesch-Nyhan syndrome. Distinctive ribonuclease A cleavage patterns were identified in messenger RNA from 5 of 14 Lesch-Nyhan patients who were chosen because no HPRT Southern or Northern blotting pattern changes had been found. This approach now allows HPRT mutation detection in 50 percent of the cases of Lesch-Nyhan syndrome. The polyuridylic acid-paper affinity procedure provides a general method for analysis of low abundance messenger RNAs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gibbs, R A -- Caskey, C T -- New York, N.Y. -- Science. 1987 Apr 17;236(4799):303-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3563511" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Chromosome Deletion ; HeLa Cells/enzymology ; Humans ; Hypoxanthine Phosphoribosyltransferase/*genetics ; Lesch-Nyhan Syndrome/*genetics ; *Mutation ; Nucleic Acid Hybridization ; RNA, Messenger/genetics ; Ribonuclease, Pancreatic
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  • 47
    Publication Date: 1987-04-03
    Description: A gene, termed gli, was identified that is amplified more than 50-fold in a malignant glioma. The gene is expressed at high levels in the original tumor and its derived cell line and is located at chromosome 12 position (q13 to q14.3). The gli gene is a member of a select group of cellular genes that are genetically altered in primary human tumors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kinzler, K W -- Bigner, S H -- Bigner, D D -- Trent, J M -- Law, M L -- O'Brien, S J -- Wong, A J -- Vogelstein, B -- CA-09243/CA/NCI NIH HHS/ -- CA-43722/CA/NCI NIH HHS/ -- NS-20023/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1987 Apr 3;236(4797):70-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3563490" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; *Chromosomes, Human, Pair 12 ; Cloning, Molecular ; DNA, Neoplasm/*genetics ; *Gene Amplification ; Gene Expression Regulation ; Glioma/*genetics ; Humans ; RNA, Messenger/genetics ; RNA, Neoplasm/genetics
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  • 48
    Publication Date: 1987-08-28
    Description: In order to identify the genetic factors associated with the radiation-resistant human laryngeal carcinoma cell line (SQ-20B), tumor cell DNA was transfected into NIH/3T3 cells. A high incidence (six out of six) of raf sequences was found in transfected NIH/3T3 clones and the tumorigenic potential of SQ-20B DNA could be linked to genomic fragments that represent most of the kinase domain of human c-raf-1. An apparently unaltered 3.5-kilobase pair (kb) human c-raf transcript was identified in SQ-20B cells but was not observed in the transfected NIH/3T3 cell clones. Two new transcripts (4.2 kb and 2.6 kb) were found in tumorigenic clones; the large transcript was missing in a very poorly tumorigenic clone. Cytogenetic analysis indicated that the normal autosomes of chromosome 3 were absent in SQ-20B karyotypes and had formed apparently stable marker chromosomes. Unlike the recipient NIH/3T3 cell line, 30 percent of the transformed clone-1 metaphases had minute and double-minute chromosomes representative of amplified DNA sequences. The frequency of the c-raf-1 identification by NIH/3T3 transfection of SQ-20B DNA suggests the presence of some genetic abnormality within this locus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kasid, U -- Pfeifer, A -- Weichselbaum, R R -- Dritschilo, A -- Mark, G E -- CA425969/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1987 Aug 28;237(4818):1039-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3616625" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; DNA, Neoplasm/genetics ; Humans ; Karyotyping ; Laryngeal Neoplasms/*genetics/radiotherapy ; Mice ; Mice, Nude ; Nucleic Acid Hybridization ; Oncogenes/*radiation effects ; Proto-Oncogenes/radiation effects ; *Radiation Tolerance
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  • 49
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-12-11
    Description: Vasoactive intestinal peptide (VIP) is a neuropeptide with broad tissue distribution. Although its precise function is unknown, it is thought to exert its effect, at least in part, by interacting with cell surface receptors. Nuclear receptors for VIP have now been identified by specific binding of 125I-labeled VIP to nuclei of a human colonic adenocarcinoma cell line (HT29) and by cross-linking of 125I-labeled VIP to its receptor on intact nuclei. In contrast, 125I-labeled transferrin shows only background binding to nuclei but significant binding to intact cells. Purity of the isolated nuclei was further substantiated by electron microscopy. The apparent molecular sizes of the VIP--cross-linked nuclear and cell surface receptors are similar but not identical.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Omary, M B -- Kagnoff, M F -- DK07202/DK/NIDDK NIH HHS/ -- DK35108/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1987 Dec 11;238(4833):1578-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, University of California, San Diego, La Jolla 92093.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2825352" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/*metabolism/ultrastructure ; Cell Line ; Cell Nucleus/*metabolism/ultrastructure ; Colonic Neoplasms/*metabolism/ultrastructure ; Humans ; Kinetics ; Microscopy, Electron ; Receptors, Gastrointestinal Hormone/*metabolism ; Receptors, Vasoactive Intestinal Peptide ; Vasoactive Intestinal Peptide/*metabolism
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  • 50
    Publication Date: 1987-06-05
    Description: Cell cycle-dependent histone genes are transcribed at a basal level throughout the cell cycle, with a three- to fivefold increase during early S phase. Protein-DNA interactions in the 5' promoter region of a cell cycle-regulated human H4 histone gene have been analyzed at single-nucleotide resolution in vivo. This region contains two sites, with four potential protein-binding domains, at which the DNA is protected from reaction with dimethyl sulfate in cells and from digestion with deoxyribonuclease I in nuclei. These protein-DNA interactions persist during all phases of the cell cycle and dissociate with 0.16 to 0.2M sodium chloride.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pauli, U -- Chrysogelos, S -- Stein, G -- Stein, J -- Nick, H -- GM32010/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1987 Jun 5;236(4806):1308-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3035717" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cell Cycle ; Cell Line ; Dna ; DNA Restriction Enzymes ; Deoxyribonuclease I ; Gene Expression Regulation ; Histones/*genetics ; Humans ; Nucleic Acid Hybridization ; *Promoter Regions, Genetic ; Protein Binding ; Sulfuric Acid Esters
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  • 51
    Publication Date: 1987-05-01
    Description: A partial amino acid sequence obtained for porcine atrial muscarinic acetylcholine receptor was used to isolate complementary DNA clones containing the complete receptor coding region. The deduced 466-amino acid polypeptide exhibits extensive structural and sequence homology with other receptors coupled to guanine nucleotide binding (G) proteins (for example, the beta-adrenergic receptor and rhodopsins); this similarity predicts a structure of seven membrane-spanning regions distinguished by the disposition of a large cytoplasmic domain. Stable transfection of the Chinese hamster ovary cell line with the atrial receptor complementary DNA leads to the binding of muscarinic antagonists in these cells with affinities characteristic of the M2 receptor subtype. The atrial muscarinic receptor is encoded by a unique gene consisting of a single coding exon and multiple, alternatively spliced 5' noncoding regions. The atrial receptor is distinct from the cerebral muscarinic receptor gene product, sharing only 38% overall amino acid homology and possessing a completely nonhomologous large cytoplasmic domain, suggesting a role for the latter region in differential effector coupling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peralta, E G -- Winslow, J W -- Peterson, G L -- Smith, D H -- Ashkenazi, A -- Ramachandran, J -- Schimerlik, M I -- Capon, D J -- CA16417/CA/NCI NIH HHS/ -- HL23632/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1987 May 1;236(4801):600-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3107123" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cell Line ; DNA/genetics ; Exons ; GTP-Binding Proteins/metabolism ; Heart Atria/analysis ; Immunosorbent Techniques ; Membrane Proteins ; Molecular Weight ; Nucleic Acid Hybridization ; Peptide Fragments/metabolism ; Quinuclidinyl Benzilate/metabolism ; Receptors, Muscarinic/*genetics/metabolism ; Sequence Homology, Nucleic Acid ; Swine ; Transfection
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  • 52
    Publication Date: 1987-08-07
    Description: The avian acute leukemia virus E26 induces a mixed erythroid-myeloid leukemia in chickens and carries two distinct oncogenes, v-myb and v-ets. Recently, a novel gene named erg, closely related to the v-ets oncogene, was identified in human COLO 320 cells and the nucleotide sequence of its approximately 5.0-kilobase transcript, erg 1 was determined. In the present study, the nucleotide sequence of the alternatively spliced transcript, erg 2, was found to differ from erg 1 by a splicing event that causes a coding frameshift near the amino terminus, resulting in an additional 99-amino acid insertion at the amino-terminus. Expression of complementary DNAs for the two transcripts in vitro resulted in synthesis of polypeptides of approximately 41 and 52 kilodaltons, suggesting the use of alternative translation initiation codons in the case of erg proteins. The erg gene was localized by somatic cell genetic analysis to human chromosome 21. It is proposed that alternative sites of splicing and polyadenylation, together with alternative sites of translation initiation, allow the synthesis of two related polypeptides from a single erg gene transcriptional unit.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rao, V N -- Papas, T S -- Reddy, E S -- New York, N.Y. -- Science. 1987 Aug 7;237(4815):635-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3299708" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Cell Line ; *Chromosomes, Human, Pair 21 ; Cloning, Molecular ; Humans ; Oncogenes ; Plasmids ; Poly A/metabolism ; *Protein Biosynthesis ; Proto-Oncogene Proteins/biosynthesis ; *Proto-Oncogenes ; *RNA Splicing ; RNA, Messenger ; Sequence Homology, Nucleic Acid
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  • 53
    Publication Date: 1987-09-11
    Description: The validity of mouse liver tumor end points in assessing the potential hazards of chemical exposure to humans is a controversial but important issue, since liver neoplasia in mice is the most frequent tumor target tissue end point in 2-year carcinogenicity studies. The ability to distinguish between promotion of background tumors versus a genotoxic mechanism of tumor initiation by chemical treatment would aid in the interpretation of rodent carcinogenesis data. Activated oncogenes in chemically induced and spontaneously occurring mouse liver tumors were examined and compared as one approach to determine the mechanism by which chemical treatment caused an increased incidence of mouse liver tumors. Data suggest that furan and furfural caused an increased incidence in mouse liver tumors at least in part by induction of novel weakly activating point mutations in ras genes even though both chemicals did not induce mutations in Salmonella assays. In addition to ras oncogenes, two activated raf genes and four non-ras transforming genes were detected. The B6C3F1 mouse liver may thus provide a sensitive assay system to detect various classes of proto-oncogenes that are susceptible to activation by carcinogenic insult. As illustrated with mouse liver tumors, analysis of activated oncogenes in spontaneously occurring and chemically induced rodent tumors will provide information at a molecular level to aid in the use of rodent carcinogenesis data for risk assessment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reynolds, S H -- Stowers, S J -- Patterson, R M -- Maronpot, R R -- Aaronson, S A -- Anderson, M W -- New York, N.Y. -- Science. 1987 Sep 11;237(4820):1309-16.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3629242" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; *Cell Transformation, Neoplastic ; Cells, Cultured ; Liver Neoplasms/*genetics ; Mice ; Mutation ; Nucleic Acid Hybridization ; *Oncogenes ; *Proto-Oncogenes ; Risk
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  • 54
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-04-10
    Description: Comparison of amino acid sequences from human epidermal growth factor (EGF) receptor and avian erythroblastosis virus erbB oncogene product suggests that v-erbB represents a truncated avian EGF receptor gene product. Although both proteins are transmembrane tyrosine kinases, the v-erbB protein lacks most of the extracellular ligand-binding domain and a 32-amino acid cytoplasmic sequence present in the human EGF receptor. To test the validity of the proposed origin of v-erbB and to investigate the functional significance of the deleted extracellular sequences, a chimeric gene encoding the extracellular and the transmembrane domain of the human EGF receptor joined to sequences coding for the cytoplasmic domain of the avian erbB oncogene product was constructed. When expressed in Rat1 fibroblasts, this reconstituted gene product (HER-erbB) was transported to the cell surface and bound EGF. Its autophosphorylation activity was stimulated by interaction with the ligand. Expression of the HER-erbB chimera led to anchorage-independent cell growth in soft agar and EGF-induced focus formation in Rat1 monolayers. Thus, it appears that v-erbB protein sequences in the chimeric receptor retain their transforming activity under the influence of the human extracellular EGF-binding domain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Riedel, H -- Schlessinger, J -- Ullrich, A -- New York, N.Y. -- Science. 1987 Apr 10;236(4798):197-200.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3494307" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Cycle ; Cell Line ; *Cell Transformation, Neoplastic ; DNA, Recombinant ; Epidermal Growth Factor/*physiology ; Humans ; *Oncogenes ; Phosphorylation ; Protein-Tyrosine Kinases/*genetics ; Rats ; Receptor, Epidermal Growth Factor/*genetics
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  • 55
    Publication Date: 1987-07-24
    Description: Fragile X syndrome is a common form of mental retardation associated with a fragile site on the human X chromosome. Although fragility at this site is usually evident as a nonstaining chromatid gap, it remains unclear whether or not actual chromosomal breakage occurs. By means of somatic cell hybrids containing either a normal human X or a fragile X chromosome and utilizing two genes that flank the fragile site as markers of chromosome integrity, segregation of these markers was shown to be more frequent if they encompass the fragile site under appropriate culture conditions. Hybrid cells that reveal marker segregation were found to contain rearranged X chromosomes involving the region at or near the fragile site, thus demonstrating true chromosomal breakage within this area. Two independent translocation chromosomes were identified involving a rodent chromosome joined to the human X at the location of the fragile site. DNA analysis of closely linked, flanking loci was consistent with the position of the breakpoint being at or very near the fragile X site. Fragility at the translocation junctions was observed in both hybrids, but at significantly lower frequencies than that seen in the intact X of the parental hybrid. This observation suggests that the human portion of the junctional DNA may contain part of a repeated fragility sequence. Since the translocation junctions join heterologous DNA, the molecular cloning of the fragile X sequence should now be possible.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warren, S T -- Zhang, F -- Licameli, G R -- Peters, J F -- CA31777/CA/NCI NIH HHS/ -- HD20521/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1987 Jul 24;237(4813):420-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3603029" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Chromosome Banding ; *Cloning, Molecular ; Female ; Fragile X Syndrome/*genetics ; Glucosephosphate Dehydrogenase/genetics ; Humans ; Hybrid Cells/cytology ; Hypoxanthine Phosphoribosyltransferase/genetics ; Male ; Sex Chromosome Aberrations/*genetics ; Translocation, Genetic
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  • 56
    Publication Date: 1987-12-11
    Description: To investigate the mechanism by which immune activation augments replication of the human immunodeficiency virus type 1 (HIV-1) in infected T cells, four different classes of T cell mitogens were evaluated for their effects on the HIV-1 long terminal repeat (LTR). Phytohemagglutinin (PHA), a mitogenic lectin; phorbol 12-myristic 13-acetate, a tumor promoter; ionomycin, a calcium ionophore; and tat-1, the trans-activator protein from the human T cell leukemia/lymphoma virus type I (HTLV-I) each stimulated the HIV-1 LTR. Studies of deleted forms of the LTR supported a central role in these responses for the HIV-1 enhancer, which alone was sufficient for mitogen inducibility, but also suggested that other 5' positive and negative regulatory elements contribute to the overall magnitude of the response. Synergistic activation of the HIV-1 LTR (up to several thousandfold) was observed with combinations of these mitogens and the HIV-1--derived tat-III protein. Cyclosporin A, an immunosuppressive agent, inhibited PHA-mediated activation of the HIV-1 LTR but was without effect in the presence of other mitogens. Thus, HIV-1 gene expression and replication appear to be regulated, via the HIV-1 LTR, by the same mitogenic signals that induce T cell activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Siekevitz, M -- Josephs, S F -- Dukovich, M -- Peffer, N -- Wong-Staal, F -- Greene, W C -- New York, N.Y. -- Science. 1987 Dec 11;238(4833):1575-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Duke University School of Medicine, Durham, NC 27710.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2825351" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Cyclosporins/pharmacology ; Deltaretrovirus/*physiology ; Genes, Viral ; HIV/drug effects/genetics/*growth & development ; Mitogens/*pharmacology ; Retroviridae Proteins/*physiology ; T-Lymphocytes/*immunology ; Trans-Activators ; Transcription Factors/*physiology ; Transcription, Genetic ; *Virus Activation/drug effects
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  • 57
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-10-16
    Description: Proliferation of activated cytotoxic T lymphocytes (CTLs) that recognize foreign histocompatibility antigens is induced by interleukin-2, a potent immunoregulatory molecule originally described as T cell growth factor. Interleukin-2 (IL-2) is widely used to isolate and induce clonal expansion of CTLs for functional studies in vitro and in vivo. However, in studies with CTLs specific for class I and class II histocompatibility antigens, IL-2 rapidly downregulated the lytic activity of some class II-specific CTLs in a time- and dose-dependent manner. Lytic activity of L3T4+ CTLs specific for the murine class II antigen I-Ek was repeatedly up- and downregulated in vitro by alternate exposure to specific (alloantigen) and nonspecific (recombinant IL-2) signals, respectively. These results demonstrate that some CTLs modulate their functional property (cytolysis) while undergoing IL-2-driven cell proliferation without loss of antigen specificity or ability to revert to a lytic phenotype.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shih, C C -- Truitt, R L -- AI-22312/AI/NIAID NIH HHS/ -- CA-39854/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1987 Oct 16;238(4825):344-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics, Medical College of Wisconsin, Children's Hospital of Wisconsin, Milwaukee 53233.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2443976" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antigens, Differentiation, T-Lymphocyte/genetics ; Cell Line ; Clone Cells/immunology ; Cytotoxicity, Immunologic ; Epitopes ; H-2 Antigens/immunology ; Interleukin-2/*physiology ; Isoantigens/immunology ; *Lymphocyte Activation ; Mice ; Phenotype ; T-Lymphocytes, Cytotoxic/*immunology
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  • 58
    Publication Date: 1987-12-18
    Description: The initial event in the infection of human T lymphocytes, macrophages, and other cells by human immunodeficiency virus (HIV-1) is the attachment of the HIV-1 envelope glycoprotein gp120 to its cellular receptor, CD4. As a step toward designing antagonists of this binding event, soluble, secreted forms of CD4 were produced by transfection of mammalian cells with vectors encoding versions of CD4 lacking its transmembrane and cytoplasmic domains. The soluble CD4 so produced binds gp120 with an affinity and specificity comparable to intact CD4 and is capable of neutralizing the infectivity of HIV-1. These studies reveal that the high-affinity CD4-gp120 interaction does not require other cell or viral components and may establish a novel basis for therapeutic intervention in the acquired immune deficiency syndrome (AIDS).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, D H -- Byrn, R A -- Marsters, S A -- Gregory, T -- Groopman, J E -- Capon, D J -- New York, N.Y. -- Science. 1987 Dec 18;238(4834):1704-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Genentech, Inc., South San Francisco, CA 94080.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3500514" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/immunology ; Animals ; Antigens, Differentiation, T-Lymphocyte/*immunology ; Cell Line ; HIV/immunology/*pathogenicity/physiology ; Humans ; Receptors, Virus/immunology/*physiology ; Recombinant Proteins/immunology ; T-Lymphocytes/*immunology ; Viral Envelope Proteins/immunology/*physiology
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  • 59
    Publication Date: 1987-05-01
    Description: The mechanisms underlying the ontogeny of voltage-gated ion channels in muscle are unknown. Whether expression of voltage-gated channels is dependent on mitogen withdrawal and growth arrest, as is generally true for the induction of muscle-specific gene products, was investigated in the BC3H1 muscle cell line by patch-clamp techniques. Differentiated BC3H1 myocytes expressed functional Ca2+ and Na+ channels that correspond to those found in T tubules of skeletal muscle. However, Ca2+ and Na+ channels were first detected after about 5 days of mitogen withdrawal. In order to test whether cellular oncogenes, as surrogates for exogenous growth factors, could prevent the expression of ion channels whose induction was contingent on mitogen withdrawal, BC3H1 cells were modified by stable transfection with oncogene expression vectors. Expression vectors containing v-erbB, or c-myc under the control of the SV40 promoter, delayed but did not prevent the appearance of functional Ca2+ and Na+ channels. In contrast, transfection with a Val12 c-H-ras vector, or cotransfection of c-myc together with v-erbB, suppressed the formation of functional Ca2+ and Na+ channels for greater than or equal to 4 weeks. Potassium channels were affected neither by mitogenic medium nor by transfected oncogenes. Thus, the selective effects of certain oncogenes on ion channel induction corresponded to the suppressive effects of mitogenic medium.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Caffrey, J M -- Brown, A M -- Schneider, M D -- HL36475/HL/NHLBI NIH HHS/ -- HL37044/HL/NHLBI NIH HHS/ -- RR-05425/RR/NCRR NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1987 May 1;236(4801):570-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2437651" target="_blank"〉PubMed〈/a〉
    Keywords: Calcium/metabolism ; Cell Line ; Electric Conductivity ; Growth Substances/physiology ; Ion Channels/*physiology ; Mitogens/*pharmacology ; Muscles/*physiology ; *Oncogenes ; Potassium/metabolism ; Sodium/metabolism ; Transfection
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  • 60
    Publication Date: 1987-08-14
    Description: A retroviral vector was used to insert human alpha 1-antitrypsin (alpha 1AT) complementary DNA into the genome of mouse fibroblasts to create a clonal population of mouse fibroblasts secreting human alpha 1AT. After demonstrating that this clone of fibroblasts produced alpha 1AT after more than 100 population doublings in the absence of selection pressure, the clone was transplanted into the peritoneal cavities of nude mice. When the animals were evaluated 4 weeks later, human alpha 1AT was detected in both sera and the epithelial surface of the lungs. The transplanted clone of fibroblasts could be recovered from the peritoneal cavities of those mice and demonstrated to still be producing human alpha 1AT. Thus, even after removal of selective pressure, a single clone of retroviral vector-infected cells that expressed an exogenous gene in vitro, continued to do so in vivo, and when recovered, continued to produce the product of the exogenous gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Garver, R I Jr -- Chytil, A -- Courtney, M -- Crystal, R G -- New York, N.Y. -- Science. 1987 Aug 14;237(4816):762-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3497452" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Clone Cells/metabolism ; DNA/*genetics ; DNA, Recombinant ; Fibroblasts/metabolism/*transplantation ; Humans ; Lung/metabolism ; Mice ; Mice, Nude ; Peritoneal Cavity ; Retroviridae/genetics ; *Transformation, Genetic ; alpha 1-Antitrypsin/biosynthesis/*genetics
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  • 61
    Publication Date: 1987-07-31
    Description: The v-abl oncogene of the Abelson murine leukemia virus (A-MuLV) is known to efficiently transform NIH/3T3 fibroblasts in vitro and to cause an acute lymphosarcoma in susceptible murine hosts. The role of its relative, the bcr/abl gene product, in the etiology of human chronic myelogenous leukemia (CML) remains speculative. To assess the transforming properties of the bcr/abl gene product, complementary DNA clones encoding the CML-specific P210 bcr/abl protein were expressed in NIH/3T3 fibroblasts. In contrast to the v-abl oncogene product P160, the P210 bcr/abl gene product did not transform NIH/3T3 cells. Cell lines were isolated that expressed high levels of the P210 bcr/abl protein but were morphologically normal. During the course of these experiments, a transforming recombinant of bcr/abl was isolated which fuses gag determinants derived from helper virus to the NH2-terminus of the bcr/abl protein. This suggests that a property of viral gag sequences, probably myristylation-dependent membrane localization, must be provided to bcr/abl for it to transform fibroblasts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Daley, G Q -- McLaughlin, J -- Witte, O N -- Baltimore, D -- 2T 32 GM07753-07/GM/NIGMS NIH HHS/ -- CA27507/CA/NCI NIH HHS/ -- CA38497/CA/NCI NIH HHS/ -- T32 GM007753/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1987 Jul 31;237(4814):532-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2440107" target="_blank"〉PubMed〈/a〉
    Keywords: Abelson murine leukemia virus/physiology ; Animals ; Cell Line ; *Cell Transformation, Neoplastic ; Cell Transformation, Viral ; Epitopes ; Fibroblasts/pathology ; Fusion Proteins, bcr-abl ; Gene Products, gag ; Leukemia, Myeloid/*genetics ; Neoplasm Proteins/*genetics/physiology ; Oncogene Proteins, Viral/*physiology ; Recombinant Fusion Proteins/*genetics/physiology ; Recombinant Proteins/*genetics ; Retroviridae Proteins/physiology ; Transfection ; Viral Proteins/*physiology
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  • 62
    Publication Date: 1987-05-01
    Description: Neoplastic transformation has been associated with a variety of structural changes in cell surface carbohydrates, most notably increased sialylation and beta 1-6-linked branching of complex-type asparagine (Asn)-linked oligosaccharides (that is, -GlcNAc beta 1-6Man alpha 1-6Man beta 1-). However, little is known about the relevant glycoproteins or how these transformation-related changes in oligosaccharide biosynthesis may affect the malignant phenotype. Here it is reported that a cell surface glycoprotein, gp 130, is a major target of increased beta 1-6-linked branching and that the expression of these oligosaccharide structures is directly related to the metastatic potential of the cells. Glycosylation mutants of a metastatic tumor cell line were selected that are deficient in both beta 1-6 GlcNAc transferase V activity and metastatic potential in situ. Moreover, induction of increased beta 1-6 branching in clones of a nonmetastatic murine mammary carcinoma correlated strongly with acquisition of metastatic potential. The results indicate that increased beta 1-6-linked branching of complex-type oligosaccharides on gp 130 may be an important feature of tumor progression related to increased metastatic potential.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dennis, J W -- Laferte, S -- Waghorne, C -- Breitman, M L -- Kerbel, R S -- R0I-CA41233/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1987 May 1;236(4801):582-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2953071" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Asparagine ; Carbohydrate Conformation ; Cell Line ; Cell Transformation, Neoplastic ; Glucosyltransferases/metabolism ; Glycosylation ; Lysosome-Associated Membrane Glycoproteins ; *Membrane Glycoproteins ; Membrane Proteins/metabolism ; Mice ; Mutation ; *N-Acetylglucosaminyltransferases ; *Neoplasm Metastasis ; Neoplasms, Experimental/genetics/metabolism ; *Oligosaccharides/biosynthesis ; Structure-Activity Relationship
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  • 63
    Publication Date: 1987-05-01
    Description: The mechanisms whereby insulin increases diacylglycerol in BC3H-1 myocytes were examined. When [3H]arachidonate labeling of phospholipids was used as an indicator of phospholipase C activation, transient increases in [3H]diacylglycerol were observed between 0.5 and 10 minutes after the onset of insulin treatment. With [3H]glycerol labeling as an indicator of de novo phospholipid synthesis, [3H]diacylglycerol was increased maximally at 1 minute and remained elevated for 20 minutes. [3H]Glycerol-labeled diacylglycerol was largely derived directly from phosphatidic acid. Insulin increased de novo phosphatidic acid synthesis within 5 to 10 seconds; within 1 minute, this synthesis was 60 times greater than that of controls. Thus, the initial increase in diacylglycerol is due to both increased hydrolysis of phospholipids and a burst of de novo phosphatidic acid synthesis. After 5 to 10 minutes, de novo phosphatidic acid synthesis continues as a major source of diacylglycerol. Both phospholipid effects of insulin seem important for generating diacylglycerol and other phospholipid-derived intracellular signaling substances.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Farese, R V -- Konda, T S -- Davis, J S -- Standaert, M L -- Pollet, R J -- Cooper, D R -- AM18608/AM/NIADDK NIH HHS/ -- HD22248/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1987 May 1;236(4801):586-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3107122" target="_blank"〉PubMed〈/a〉
    Keywords: Arachidonic Acid ; Arachidonic Acids/metabolism ; Cell Line ; Diglycerides/*metabolism ; Enzyme Activation ; Glycerides/*metabolism ; Glycerol/metabolism ; Insulin/*pharmacology ; Kinetics ; Muscles/drug effects/*metabolism ; Phosphatidic Acids/*biosynthesis ; Phosphatidylinositols/metabolism ; Phospholipids/metabolism ; Type C Phospholipases/metabolism
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  • 64
    Publication Date: 1987-01-02
    Description: Exchange of small molecules between cells through intercellular junctions is a widespread phenomenon implicated in many physiological and developmental processes. This type of intercellular communication can restore the activity of low-density lipoprotein (LDL) receptors in mammalian cells that are deficient in the enzyme UDP-Gal/UDP-GalNAc 4-epimerase. Pure cultures of the 4-epimerase mutant are unable to synthesize normal carbohydrate chains on LDL receptors and many other glycoproteins and therefore do not express LDL receptor activity. When these cells are cocultivated with cells expressing normal 4-epimerase activity, the structure and function of LDL receptors are restored to normal by the transfer of this enzyme's products through intercellular junctions. The formation of functional junctions does not require normal glycosylation of membrane proteins. Because many convenient assays and selections for LDL receptor activity are available, this mutant can provide a powerful new tool for biochemical and genetic studies of intercellular junctional communication.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hobbie, L -- Kingsley, D M -- Kozarsky, K F -- Jackman, R W -- Krieger, M -- New York, N.Y. -- Science. 1987 Jan 2;235(4784):69-73.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3798096" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Communication/drug effects ; Cell Line ; Cricetinae ; Genetic Complementation Test ; Intercellular Junctions/*physiology ; Receptors, LDL/*physiology ; Tretinoin/pharmacology ; UDPglucose 4-Epimerase/metabolism ; Uridine Diphosphate Galactose/*metabolism ; Uridine Diphosphate N-Acetylgalactosamine/*metabolism ; Uridine Diphosphate Sugars/*metabolism
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  • 65
    Publication Date: 1987-10-23
    Description: There is now evidence that the immune system, during times of infectious challenge, can stimulate the secretion of glucocorticoids, the adrenal steroids that mediate important aspects of the response to stress. Specifically, secretion of interleukin-1 (IL-1), a monocyte lymphokine secreted after infection, appears at least in part responsible for this effect. Glucocorticoids are secreted in response to a neuroendocrine cascade involving, first, the brain, then the pituitary, and finally the adrenal gland. In this report, human IL-1 is shown to activate the adrenocortical axis at the level of the brain, stimulating the release of the controlling hormone corticotropin-releasing factor (CRF) from the hypothalamus. Infusion of IL-1 induced a significant secretion of CRF into the circulation exiting the hypothalamus, whereas immunoneutralization of CRF blocked the stimulatory effect of IL-1 on glucocorticoid secretion. IL-1 appeared to have no acute direct stimulatory effects on the pituitary or adrenal components of this system. Furthermore, IL-1 did not cause a nonspecific release of other hypothalamic hormones. Thus, the lymphokine acts in a specific manner to activate the adrenocortical axis at the level of the brain; this effect appears to be unrelated to the known pyrogenic effects of IL-1 within the hypothalamus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sapolsky, R -- Rivier, C -- Yamamoto, G -- Plotsky, P -- Vale, W -- AA06420/AA/NIAAA NIH HHS/ -- AM26741/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1987 Oct 23;238(4826):522-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Stanford University, CA 94305.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2821621" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Cortex/physiology ; Adrenocorticotropic Hormone/secretion ; Animals ; Cell Line ; Corticosterone/secretion ; Corticotropin-Releasing Hormone/*secretion ; Hypothalamus/*secretion ; Immunologic Techniques ; Interleukin-1/*physiology ; Male ; Pituitary Gland, Anterior/secretion ; Pituitary Neoplasms/secretion ; Rats ; Rats, Inbred Strains
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  • 66
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-09-04
    Description: The human T cell receptor gamma locus, including eleven variable-region, five joining-region, and two constant-region segments, is contained in 160 kilobases. During T cell somatic development these genes undergo rearrangement by deletion of the sequences separating the variable and joining regions. The molecular map of this locus was completely defined by deletion mapping and restriction mapping. Restriction fragments were resolved by standard agarose electrophoresis and field inversion electrophoresis. These studies demonstrate that the deletions in this locus, which occur during the formation of a functional T cell receptor gamma-chain gene, range from 50 to 145 kilobases in length. These studies also provide a structural basis for understanding the development of the gamma-chain peptide repertoire, and extends the potential of the emerging pulsed-field electrophoretic technology.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Strauss, W M -- Quertermous, T -- Seidman, J G -- AI18436/AI/NIAID NIH HHS/ -- T32-07208/PHS HHS/ -- New York, N.Y. -- Science. 1987 Sep 4;237(4819):1217-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3498213" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Chromosome Deletion ; *Genes ; Genetic Linkage ; Humans ; Macromolecular Substances ; Receptors, Antigen, T-Cell/*genetics ; T-Lymphocytes/*immunology
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  • 67
    Publication Date: 1987-12-18
    Description: Foreign genes can be stably integrated into the genome of a cell by means of DNA-mediated gene transfer techniques, and large quantities of homogenous cells that continuously express these gene products can then be isolated. Such an expression system can be used to study the functional consequences of introducing specific mutations into genes and to study the expressed protein in the absence of cellular components with which it is normally in contact. All four Torpedo acetylcholine receptor (AChR) subunit complementary DNA's were introduced into the genome of a mouse fibroblast cell by DNA-mediated gene transfer. A clonal cell line that stably produced high concentrations of correctly assembled cell surface AChR's and formed proper ligand-gated ion channels was isolated. With this new expression system, recombinant DNA, biochemical, pharmacological, and electrophysiological techniques were combined to study Torpedo AChR's in a single intact system. The physiological and pharmacological profiles of Torpedo AChR's expressed in mouse fibroblast cells differ in some details from those described earlier, and may provide a more accurate reflection of the properties of this receptor in its natural environment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Claudio, T -- Green, W N -- Hartman, D S -- Hayden, D -- Paulson, H L -- Sigworth, F J -- Sine, S M -- Swedlund, A -- NS 07102/NS/NINDS NIH HHS/ -- NS 21501/NS/NINDS NIH HHS/ -- NS 21714/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1987 Dec 18;238(4834):1688-94.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, CT 06510.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3686008" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Membrane/physiology ; Fibroblasts/metabolism ; *Genes ; Kinetics ; Mice ; Receptors, Cholinergic/*genetics/metabolism ; Torpedo ; *Transfection
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  • 68
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-04-24
    Description: S-49 mouse lymphoma cells undergo lysis when treated with glucocorticoids; the mechanism of this effect is not understood. A protein was detected in the plasma membrane of these cells by means of direct immunofluorescent labeling with a monoclonal antibody to the soluble glucocorticoid receptor. Cellular heterogeneity in the content of this glucocorticoid receptor-like molecule was evident. By immunoadsorption to antibody-coated tissue culture plates, the cells were separated into populations positive (100%) and depleted (38%) for this membrane antigen. Gel electrophoresis, specific immunoblot, and autoradiographic (binding of [3H]dexamethasone mesylate) analysis of the membrane proteins from the membrane antigen-positive group revealed multiple protein bands ranging in size from 85 to 145 kilodaltons. Furthermore, comparison of the glucocorticoid sensitivity of these groups of cells showed complete lysis of the membrane antigen-positive cells and only partial lysis of the antigen-deficient group, which suggests that the lysis response of cells to glucocorticoids is mediated by a glucocorticoid receptor-like molecule located in the plasma membrane.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gametchu, B -- CA17701/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1987 Apr 24;236(4800):456-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3563523" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Neoplasm/*analysis ; Antigens, Surface/*analysis ; Cell Line ; Cell Membrane/immunology/metabolism ; Cell Nucleus/metabolism ; Cell Survival/drug effects ; Cytoplasm/metabolism ; Dexamethasone/metabolism/pharmacology ; Lymphoma/*immunology ; Mice ; Molecular Weight ; Receptors, Glucocorticoid/*immunology/metabolism
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  • 69
    Publication Date: 1987-10-23
    Description: Monoclonal antibodies linked to toxic proteins (immunotoxins) can selectively kill some tumor cells in vitro and in vivo. However, reagents that combine the full potency of the native toxins with the high degree of cell type selectivity of monoclonal antibodies have not previously been designed. Two heretofore inseparable activities on one polypeptide chain of diphtheria toxin and ricin account for the failure to construct optimal reagents. The B chains (i) facilitate entry of the A chain to the cytosol, which allows immunotoxins to efficiently kill target cells, and (ii) bind to receptors present on most cells, which imparts to immunotoxins a large degree of non-target cell toxicity. This report identifies point mutations in the B polypeptide chain of diphtheria toxin that block binding but allow cytosol entry. Three mutants of diphtheria toxin have 1/1,000 to 1/10,000 the toxicity and 1/100 to 1/8,000 the binding activity of diphtheria toxin. Linking of either of two of the inactivated mutant toxins (CRM103, Phe508; CRM107, Phe390, Phe525) to a monoclonal antibody specific for human T cells reconstitutes full target-cell toxicity--indistinguishable from that of the native toxin linked to the same antibody--without restoring non-target cell toxicity. This separation of the entry function from the binding function generates a uniquely potent and cell type-specific immunotoxin that retains full diphtheria toxin toxicity, yet is four to five orders of magnitude less toxic than the native toxin is to nontarget cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Greenfield, L -- Johnson, V G -- Youle, R J -- New York, N.Y. -- Science. 1987 Oct 23;238(4826):536-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbial Genetics, Cetus Corporation, Emeryville, CA 94608.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3498987" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal ; Antigens, Differentiation, T-Lymphocyte/immunology ; Antigens, Surface/immunology ; Cell Line ; Cell Survival/drug effects ; Chemical Phenomena ; Chemistry ; Diphtheria Toxin/genetics/*metabolism/pharmacology ; Heparin-binding EGF-like Growth Factor ; Immunotoxins/*pharmacology ; Intercellular Signaling Peptides and Proteins ; *Mutation ; *Receptors, Cell Surface ; Receptors, Cholinergic/metabolism ; Ricin/metabolism ; Structure-Activity Relationship ; T-Lymphocytes/immunology ; Vero Cells
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  • 70
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-05-22
    Description: Macrophages that rapidly enter injured peripheral nerve synthesize and secrete large quantities of apolipoprotein E. This protein may be involved in the redistribution of lipid, including cholesterol released during degeneration, to the regenerating axons. To test this postulate, apolipoprotein E-associated lipid particles released from segments of injured rat sciatic nerve and apolipoprotein E-containing lipoproteins from plasma were used to determine whether sprouting neurites, specifically their growth cones, possessed lipoprotein receptors. Pheochromocytoma (PC12) cells, which can be stimulated to produce neurites in vitro, were used as a model system. Apolipoprotein E-containing lipid particles and lipoproteins, which had been labeled with fluorescent dye, were internalized by the neurites and their growth cones; the unmetabolized dye appeared to be localized to the lysosomes. The rapid rate of accumulation in the growth cones precludes the possibility of orthograde transport of the fluorescent particles from the PC12 cell bodies. Thus, receptor-mediated lipoprotein uptake is performed by the apolipoprotein B,E(LDL) (low density lipoprotein) receptors, and in the regenerating peripheral nerve apolipoprotein E may deliver lipids to the neurites and their growth cones for membrane biosynthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ignatius, M J -- Shooter, E M -- Pitas, R E -- Mahley, R W -- MH 17047/MH/NIMH NIH HHS/ -- NS 04270/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1987 May 22;236(4804):959-62.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3576212" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Gland Neoplasms ; Animals ; Apolipoproteins E/*metabolism ; Axons/ultrastructure ; Cell Line ; Cells, Cultured ; Neurons/*cytology/metabolism ; Pheochromocytoma ; Rats ; Sciatic Nerve/*cytology/metabolism
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  • 71
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-11-06
    Description: Nerve growth factor (NGF) is a trophic agent that promotes the outgrowth of nerve fibers from sympathetic and sensory ganglia. The neuronal differentiation stimulated by this hormone was examined in the NGF-responsive cell line PC12. Differential hybridization was used to screen a complementary DNA library constructed from PC12 cells treated with NGF and cycloheximide. One of the complementary DNA clones that was rapidly induced by NGF was found to have a nucleotide sequence that predicts a 54-kilodalton protein with homology to transcriptional regulatory proteins. This clone, NGFI-A, contains three tandemly repeated copies of the 28- to 30-amino acid "zinc finger" domain present in Xenopus laevis TFIIIA and other DNA-binding proteins. It also contains another highly conserved unit of eight amino acids that is repeated at least 11 times. The NGFI-A gene is expressed at relatively high levels in the brain, lung, and superior cervical ganglion of the adult rat.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Milbrandt, J -- NS01018/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1987 Nov 6;238(4828):797-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3672127" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Gland Neoplasms ; Amino Acid Sequence ; Animals ; Base Sequence ; Cell Line ; Cycloheximide/pharmacology ; DNA/metabolism ; Genes/*drug effects ; Genes, Regulator/drug effects ; Molecular Sequence Data ; Molecular Weight ; Nerve Growth Factors/*pharmacology ; Pheochromocytoma ; Sequence Homology, Nucleic Acid ; Transcription Factors/*genetics
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  • 72
    Publication Date: 1987-07-17
    Description: New blood vessel growth occurs during normal fetal development and in diseases such as cancer and diabetes. The polypeptide angiogenin induces new blood vessel growth in two biological assays and may play a role in the vascular development of the fetus and in the neovascularization that accompanies diseases and wound healing. A complementary DNA probe for human angiogenin was used to examine the tissue distribution of angiogenin messenger RNA (mRNA) in the developing rat and in selected transformed cell lines. Angiogenin mRNA was detected predominantly in adult liver but was also detectable at low levels in other tissues. The expression of the angiogenin gene in rat liver was found to be developmentally regulated; mRNA levels were low in the developing fetus, increased in the neonate, and maximal in the adult. The amount of angiogenin mRNA in human HT-29 colon carcinoma and SK-HEP hepatoma cells was not greater than that in normal rat liver. These results demonstrate that angiogenin is predominantly expressed in adult liver, that the pattern of angiogenin gene expression is not temporally related to vascular development in the rat, and that the transformed cells studied do not contain more angiogenin mRNA than does normal liver. If angiogenin activity is controlled at the transcriptional level, the results of this study suggest that the primary function of angiogenin in vivo may be in processes other than the regulation of vascular growth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weiner, H L -- Weiner, L H -- Swain, J L -- HL26831/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1987 Jul 17;237(4812):280-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2440105" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Animals ; Cell Line ; Gene Expression Regulation ; Humans ; Liver/physiology ; Neoplasm Proteins/*genetics ; Neovascularization, Pathologic ; RNA, Messenger/genetics ; Rats ; *Ribonuclease, Pancreatic ; Tissue Distribution
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  • 73
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-11-27
    Description: Several proteins of viral and cellular origin are acylated with myristic acid early during their biogenesis. To investigate the possibility that myristylation occurred cotranslationally, the BC3H1 muscle cell line, which contains a broad array of myristylated proteins, was pulse-labeled with [3H]myristic acid. Nascent polypeptide chains covalently associated with transfer RNA were isolated subsequently by ion-exchange chromatography. [3H]Myristate was attached to nascent chains through an amide linkage and was identified by thin-layer chromatography after its release from nascent chains by acid methanolysis. Inhibition of cellular protein synthesis with puromycin resulted in cessation of [3H]myristate-labeling of nascent chains, in agreement with the dependence of this modification on protein synthesis in vivo. These data represent a direct demonstration that myristylation of proteins is a cotranslational modification.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilcox, C -- Hu, J S -- Olson, E N -- New York, N.Y. -- Science. 1987 Nov 27;238(4831):1275-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology, University of Texas, M.D. Anderson Hospital and Tumor Institute at Houston 77030.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3685978" target="_blank"〉PubMed〈/a〉
    Keywords: Acylation ; Animals ; Cell Line ; Kinetics ; Methionine/metabolism ; Muscles ; Myristic Acid ; Myristic Acids/*metabolism ; *Protein Biosynthesis ; Proteins/*genetics/metabolism ; Sulfur Radioisotopes ; Tritium
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  • 74
    Publication Date: 1987-08-21
    Description: Humoral hypercalcemia of malignancy is a common complication of lung and certain other cancers. The hypercalcemia results from the actions of tumor factors on bone and kidney. We report here the isolation of full-length complementary DNA clones of a putative hypercalcemia factor, and the expression from the cloned DNA of the active protein in mammalian cells. The clones encode a prepro peptide of 36 amino acids and a mature protein of 141 amino acids that has significant homology with parathyroid hormone in the amino-terminal region. This previously unrecognized hormone may be important in normal as well as abnormal calcium metabolism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Suva, L J -- Winslow, G A -- Wettenhall, R E -- Hammonds, R G -- Moseley, J M -- Diefenbach-Jagger, H -- Rodda, C P -- Kemp, B E -- Rodriguez, H -- Chen, E Y -- New York, N.Y. -- Science. 1987 Aug 21;237(4817):893-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3616618" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cell Line ; Cloning, Molecular ; DNA/genetics ; Gene Expression Regulation ; Humans ; Hypercalcemia/*genetics ; Lung Neoplasms/complications/*genetics ; Neoplasm Proteins/*genetics ; Parathyroid Hormone/genetics ; Parathyroid Hormone-Related Protein
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  • 75
    Publication Date: 1987-10-30
    Description: To investigate whether a particular receptor subtype can be coupled to multiple effector systems, recombinant M2 muscarinic receptors were expressed in cells lacking endogenous receptor. The muscarinic agonist carbachol both inhibited adenylyl cyclase and stimulated phosphoinositide hydrolysis. The stimulation of phosphoinositide hydrolysis was significantly less efficient and more dependent on receptor levels than the inhibition of adenylyl cyclase. Both responses were mediated by guanine nucleotide binding proteins, as evidenced by their inhibition by pertussis toxin; the more efficiently coupled adenylyl cyclase response was significantly more sensitive. Thus, individual subtypes of a given receptor are capable of regulating multiple effector pathways.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ashkenazi, A -- Winslow, J W -- Peralta, E G -- Peterson, G L -- Schimerlik, M I -- Capon, D J -- Ramachandran, J -- CA16417/CA/NCI NIH HHS/ -- HL23632/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1987 Oct 30;238(4827):672-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Developmental Biology, Genentech, Inc., South San Francisco, CA 94080.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2823384" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylate Cyclase Toxin ; Adenylyl Cyclases/*metabolism ; Animals ; Carbachol/pharmacology ; Cell Line ; Cricetinae ; Cyclic AMP/biosynthesis ; GTP-Binding Proteins/*metabolism ; Gene Expression Regulation ; Guanosine 5'-O-(3-Thiotriphosphate) ; Guanosine Triphosphate/analogs & derivatives/metabolism ; Oxotremorine/pharmacology ; Pertussis Toxin ; Phosphatidylinositols/*metabolism ; Receptors, Muscarinic/*metabolism ; Recombinant Proteins ; Thionucleotides/metabolism ; Virulence Factors, Bordetella/metabolism
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  • 76
    Publication Date: 1987-10-30
    Description: The T cell receptor (TCR) delta protein is expressed as part of a heterodimer with TCR gamma, in association with the CD3 polypeptides on a subset of functional peripheral blood T lymphocytes, thymocytes, and certain leukemic T cell lines. A monoclonal antibody directed against TCR delta was produced that binds specifically to the surface of several TCR gamma delta cell lines and immunoprecipitates the TCR gamma delta as a heterodimer from Triton X-100 detergent lysates and also immunoprecipitates the TCR delta subunit alone after chain separation. A candidate human TCR delta complementary DNA clone (IDP2 O-240/38), reported in a companion paper, was isolated by the subtractive library approach from a TCR gamma delta cell line. This complementary DNA clone was used to direct the synthesis of a polypeptide that is specifically recognized by the monoclonal antibody to TCR delta. This complementary DNA clone thus corresponds to the gene that encodes the TCR delta subunit.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Band, H -- Hochstenbach, F -- McLean, J -- Hata, S -- Krangel, M S -- Brenner, M B -- 1-KO1-AMO1598/AM/NIADDK NIH HHS/ -- 5RO1-AI15669/AI/NIAID NIH HHS/ -- SO7RR5526-24/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1987 Oct 30;238(4827):682-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Tumor Virology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3672118" target="_blank"〉PubMed〈/a〉
    Keywords: Antibodies, Monoclonal/*immunology ; Antibody Specificity ; Cell Line ; Cloning, Molecular ; DNA/genetics ; Glycoproteins/genetics/immunology ; Humans ; Receptors, Antigen, T-Cell/*genetics/immunology ; Recombinant Proteins/immunology
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  • 77
    Publication Date: 1987-11-27
    Description: Decay accelerating factor (DAF) belongs to a novel group of membrane proteins anchored to the cell surface by a glycophospholipid membrane anchor that is covalently attached to the carboxyl terminus of the protein. The last 37 amino acids of membrane DAF, when fused to the carboxyl terminus of a secreted protein, are sufficient to target the fusion protein to the plasma membrane by means of a glycophospholipid anchor. This approach provides a novel means of targeting proteins to the cell-surface membrane.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Caras, I W -- Weddell, G N -- Davitz, M A -- Nussenzweig, V -- Martin, D W Jr -- AI-08499/AI/NIAID NIH HHS/ -- AI-23276/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1987 Nov 27;238(4831):1280-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Genentech, Inc., South San Francisco, CA 94080.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2446389" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD55 ; Cell Line ; Cell Membrane/physiology ; DNA/metabolism ; Membrane Lipids/*metabolism ; Membrane Proteins/genetics/*metabolism ; Phospholipids/*metabolism ; Transfection
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  • 78
    Publication Date: 1987-11-27
    Description: The c-myc proto-oncogene is involved in chromosomal translocations that are specifically and consistently found in Burkitt lymphoma. Although these translocations are thought to lead to a deregulation of c-myc expression, the structural and functional basis of this phenomenon has not been identified. Mutations in a specific region spanning approximately 70 base pairs and located at the 3' border of the first exon of translocated c-myc alleles were consistently detected in Burkitt lymphoma cells carrying classic (8:14) as well as variant (8:22 and 2:8) translocations. These structural alterations were accompanied by an altered pattern of c-myc transcription, namely, the removal of a block to transcriptional elongation that has been mapped to the same region. Thus, specific c-myc mutations leading to the alleviation of this block to transcriptional elongation may represent a general mechanism causing c-myc activation in Burkitt lymphoma.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cesarman, E -- Dalla-Favera, R -- Bentley, D -- Groudine, M -- NCI 28151/CI/NCPDCID CDC HHS/ -- NCI 37165/CI/NCPDCID CDC HHS/ -- NCI 37195/CI/NCPDCID CDC HHS/ -- New York, N.Y. -- Science. 1987 Nov 27;238(4831):1272-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, New York University School of Medicine, NY 10016.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3685977" target="_blank"〉PubMed〈/a〉
    Keywords: Burkitt Lymphoma/*genetics ; Cell Line ; Chromosomes, Human, Pair 14 ; Chromosomes, Human, Pair 2 ; Chromosomes, Human, Pair 22 ; Chromosomes, Human, Pair 8 ; *Exons ; Humans ; *Mutation ; *Proto-Oncogenes ; *Transcription, Genetic ; *Translocation, Genetic
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  • 79
    Publication Date: 1987-10-30
    Description: The orderly and sequential activation of genes during development is hypothesized to be related to the selective expression of groups of regulatory proteins acting primarily at the level of transcription. A nuclear protein was found in hepatocytes, but not other cell types, that binds to a sequence required for hepatocyte-specific transcription of the gene for the beta chain of fibrinogen. This protein, hepatocyte nuclear factor 1 (HNF1), also interacts with homologous sequences required for optimal promoter function of the genes for the alpha chain of fibrinogen and alpha 1-antitrypsin. The promoter or enhancer regions for several viral and cellular genes not expressed in the liver did not compete for this binding. The restricted expression of HNF1 and its selective interaction with the control regions of several liver-specific genes indicate that it is involved in developmentally regulated gene expression in the liver.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Courtois, G -- Morgan, J G -- Campbell, L A -- Fourel, G -- Crabtree, G R -- CA39612/CA/NCI NIH HHS/ -- HL33942/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1987 Oct 30;238(4827):688-92.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Stanford University School of Medicine, CA 94305.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3499668" target="_blank"〉PubMed〈/a〉
    Keywords: Albumins/genetics ; Base Sequence ; Binding, Competitive ; Cell Line ; DNA-Binding Proteins/*genetics ; Deoxyribonuclease I ; Fibrinogen/*genetics ; *Gene Expression Regulation ; Liver/*physiology ; Nuclear Proteins/*physiology ; *Promoter Regions, Genetic ; Regulatory Sequences, Nucleic Acid ; Transcription Factors/*genetics ; alpha 1-Antitrypsin/*genetics
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  • 80
    Publication Date: 1987-12-11
    Description: Murine tumor cells were induced to phagocytize either Candida albicans or group A streptococcal cells. The presence of microbial particles within the tumor cell cytoplasm had no effect on in vitro tumor cell growth. However, when Candida albicans-infected tumor cells were injected into syngeneic mice, they formed tumors that grew faster, invaded the surrounding normal tissue more rapidly and metastasized more rapidly than control tumor cells. Tumor cells infected with group A streptococcal particles did not grow faster or show increased malignant behavior. These data indicate that the in vivo behavior of malignant tumor cells can be modulated by microbial particles, which are often present in the microenvironment of the growing tumor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ginsburg, I -- Fligiel, S E -- Kunkel, R G -- Riser, B L -- Varani, J -- New York, N.Y. -- Science. 1987 Dec 11;238(4833):1573-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Oral Biology, Hebrew University--Hadassah School of Dental Medicine, Jerusalem, Israel.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3317835" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Candida albicans ; Cell Line ; Fibrosarcoma/pathology/*physiopathology ; Mice ; Mice, Inbred C57BL ; *Phagocytosis ; Streptococcus pyogenes
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  • 81
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-11-27
    Description: Leukemic cells cultured in the presence of various conditioned media differentiate into macrophages. This finding suggested that the maintenance of undifferentiated state and self-renewal in vivo may be related to the inability of the host to generate an appropriate level of differentiation factor (DF). Evidence for this hypothesis was derived from experiments in vitro and in vivo with myeloid leukemia of rat. The following results were obtained: (i) in vitro, the percentage of cell differentiation at a fixed concentration of DF was inversely related to the concentration of cells; (ii) leukemic cell inoculates that were lethal to 7-day-old rats were rejected by 21-day-old rats; (iii) leukemic cells in diffusion chambers underwent differentiation in 21-day-old rats but not in 7-day-old rats; (iv) organs from 21-day-old rats contained more DF activity than those of 7-day-old rats; (v) treatment of rats with DF in diffusion chambers resulted in leukemic cell differentiation inside the chamber; and (vi) the development of leukemia in 7-day-old rats was aborted by treatment with DF. These results show that the differentiation of rat leukemia cells requires the appropriate level of DF. The proliferation of transplanted leukemia cells in 7-day-old rats goes unchecked because of inadequate generation of DF. Conversely, in the 21-day-old rats, rejection is accomplished by differentiation of the transplanted cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jimenez, J J -- Yunis, A A -- AM 07114/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1987 Nov 27;238(4831):1278-80.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, University of Miami School of Medicine, FL 33101.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3685979" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Cell Differentiation ; Cell Division ; Cell Line ; Cell Survival ; *Graft Rejection ; Leukemia, Experimental/*pathology ; Neoplasm Transplantation ; Phagocytosis ; Rats
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 82
    Publication Date: 1987-05-15
    Description: The murine epidermis contains a subpopulation of bone marrow-derived lymphocytes that have a dendritic morphology and that express Thy-1 and T3 cell-surface antigens but not other markers (L3T4 or Lyt-2) characteristic of mature peripheral T lymphocytes. An alternative type of T cell receptor was earlier identified on a subpopulation of murine thymocytes with a similar phenotype (T3+, L3T4-, Lyt-2-), but not on peripheral murine T lymphocytes. Two independently derived Thy-1+, L3T4-, and Lyt-2- dendritic cell lines of epidermal origin that express a T3-associated disulfide-linked heterodimer composed of a 34-kilodalton gamma-chain and 46-kilodalton partner (the delta chain) have now been identified. Analysis of N-linked glycosylation revealed that this receptor is similar to that detected on thymocytes. These results demonstrate that Thy-1+ dendritic epidermal cell lines can express gamma delta T cell receptors in vitro and suggest that Thy-1+ dendritic epidermal cells express such receptors in vivo. The localization of these gamma delta T cell receptor-expressing cells in the epidermis may be of importance for understanding the function of these receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koning, F -- Stingl, G -- Yokoyama, W M -- Yamada, H -- Maloy, W L -- Tschachler, E -- Shevach, E M -- Coligan, J E -- F32AM07219-03/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1987 May 15;236(4803):834-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2883729" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Surface/*analysis ; Antigens, Thy-1 ; Bone Marrow/immunology ; Cell Line ; Mice ; Molecular Weight ; Receptors, Antigen, T-Cell/*analysis ; T-Lymphocytes/*immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 83
    Publication Date: 1987-03-13
    Description: Azidothymidine and ribavirin both inhibit replication of human immunodeficiency virus in vitro and show promise of clinical utility in patients infected with this virus. In this study, the possible interactions of these drugs were examined in vitro, and a reproducible antagonism between azidothymidine and ribavirin was found to occur under a variety of experimental conditions. The mechanism responsible for this antagonism appeared to be inhibition of azidothymidine phosphorylation by ribavirin. Because similar effects may occur in vivo, clinical trials of these two drugs in combination must be performed only under carefully controlled conditions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogt, M W -- Hartshorn, K L -- Furman, P A -- Chou, T C -- Fyfe, J A -- Coleman, L A -- Crumpacker, C -- Schooley, R T -- Hirsch, M S -- CA 09382-04/CA/NCI NIH HHS/ -- CA 12464/CA/NCI NIH HHS/ -- CA 27569/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1987 Mar 13;235(4794):1376-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2435003" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; HIV/*drug effects/physiology ; Humans ; Lymphocytes/microbiology ; Monocytes/microbiology ; Phosphorylation ; Phytohemagglutinins/pharmacology ; RNA-Directed DNA Polymerase/metabolism ; Ribavirin/*pharmacology ; Ribonucleosides/*pharmacology ; Thymidine/*analogs & derivatives/antagonists & inhibitors/pharmacology ; Virus Replication/drug effects ; Zidovudine
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 84
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-10-23
    Description: Interphase nucleus and cytoplasm are distinct compartments, whose soluble macromolecular contents mix when the nuclear envelope disassembles at mitosis. To determine how their interphase identities are reestablished, fibroblasts were loaded with fluorescent dextrans and then allowed to divide. Large dextrans (molecular weight of 40,000 or more) were excluded from condensed mitotic chromosomes and from newly formed, postmitotic interphase nuclei. Therefore, postmitotic reassembly of the nucleus as a compartment distinct from cytoplasm occurs by exclusion not only of organelles but also of soluble macromolecules. This might occur by exclusion of macromolecules from condensed chromatin throughout mitosis and completion of nuclear envelope assembly before nuclear expansion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Swanson, J A -- McNeil, P L -- R01 CA42275/CA/NCI NIH HHS/ -- R23 CA44328/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1987 Oct 23;238(4826):548-50.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anatomy and Cellular Biology, Harvard Medical School, Boston, MA 02115.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2443981" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Membrane Permeability ; Cell Nucleus/metabolism/*ultrastructure ; Cytoplasm/ultrastructure ; Dextrans/*metabolism ; Fibroblasts/ultrastructure ; *Fluorescein-5-isothiocyanate/*analogs & derivatives ; Fluoresceins/metabolism ; Fluorescent Dyes ; *Interphase ; Macromolecular Substances ; Mitosis ; Molecular Weight ; Nuclear Envelope/ultrastructure ; Xanthenes
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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