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  • 1
    Publication Date: 2003-12-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brown, Martin -- Bristow, Robert -- Glazer, Peter -- Hill, Richard -- McBride, William -- McKenna, Gillies -- Muschel, Ruth -- New York, N.Y. -- Science. 2003 Dec 12;302(5652):1894; author reply 1894.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Radiation Oncology, Stanford University, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14671275" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Apoptosis ; Disease Models, Animal ; Endothelium, Vascular/*pathology/radiation effects ; Melanoma, Experimental/blood supply/immunology/pathology/*radiotherapy ; Mice ; Radiation Tolerance ; Sphingomyelin Phosphodiesterase/genetics/metabolism
    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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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2000-10-20
    Description: Triplex-forming oligonucleotides (TFOs) recognize and bind to specific duplex DNA sequences and have been used extensively to modify gene function in cells. Although germ line mutations can be incorporated by means of embryonic stem cell technology, little progress has been made toward introducing mutations in somatic cells of living organisms. Here we demonstrate that TFOs can induce mutations at specific genomic sites in somatic cells of adult mice. Mutation detection was facilitated by the use of transgenic mice bearing chromosomal copies of the supF and cII reporter genes. Mice treated with a supF-targeted TFO displayed about fivefold greater mutation frequencies in the supF gene compared with mice treated with a scrambled sequence control oligomer. No mutagenesis was detected in the control gene (cII) with either oligonucleotide. These results demonstrate that site-specific, TFO-directed genome modification can be accomplished in intact animals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vasquez, K M -- Narayanan, L -- Glazer, P M -- CA64186/CA/NCI NIH HHS/ -- CA75723/CA/NCI NIH HHS/ -- F32 CA075723/CA/NCI NIH HHS/ -- GM54731/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Oct 20;290(5491):530-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departments of Therapeutic Radiology and Genetics, Yale University School of Medicine, Boyer Center for Molecular Medicine, 295 Congress Avenue, New Haven, CT 06536, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11039937" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Pair Mismatch ; Base Sequence ; DNA/chemistry/*genetics/metabolism ; *Gene Targeting ; Genes, Reporter ; Genes, Suppressor ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Molecular Sequence Data ; *Mutagenesis, Site-Directed ; Mutation ; Oligodeoxyribonucleotides/chemistry/*genetics/metabolism ; RNA, Transfer/genetics
    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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  • 3
    Publication Date: 2011-12-06
    Description: Platelets are the second most abundant cell type in blood and are essential for maintaining haemostasis. Their count and volume are tightly controlled within narrow physiological ranges, but there is only limited understanding of the molecular processes controlling both traits. Here we carried out a high-powered meta-analysis of genome-wide association studies (GWAS) in up to 66,867 individuals of European ancestry, followed by extensive biological and functional assessment. We identified 68 genomic loci reliably associated with platelet count and volume mapping to established and putative novel regulators of megakaryopoiesis and platelet formation. These genes show megakaryocyte-specific gene expression patterns and extensive network connectivity. Using gene silencing in Danio rerio and Drosophila melanogaster, we identified 11 of the genes as novel regulators of blood cell formation. Taken together, our findings advance understanding of novel gene functions controlling fate-determining events during megakaryopoiesis and platelet formation, providing a new example of successful translation of GWAS to function.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3335296/" 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/PMC3335296/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gieger, Christian -- Radhakrishnan, Aparna -- Cvejic, Ana -- Tang, Weihong -- Porcu, Eleonora -- Pistis, Giorgio -- Serbanovic-Canic, Jovana -- Elling, Ulrich -- Goodall, Alison H -- Labrune, Yann -- Lopez, Lorna M -- Magi, Reedik -- Meacham, Stuart -- Okada, Yukinori -- Pirastu, Nicola -- Sorice, Rossella -- Teumer, Alexander -- Voss, Katrin -- Zhang, Weihua -- Ramirez-Solis, Ramiro -- Bis, Joshua C -- Ellinghaus, David -- Gogele, Martin -- Hottenga, Jouke-Jan -- Langenberg, Claudia -- Kovacs, Peter -- O'Reilly, Paul F -- Shin, So-Youn -- Esko, Tonu -- Hartiala, Jaana -- Kanoni, Stavroula -- Murgia, Federico -- Parsa, Afshin -- Stephens, Jonathan -- van der Harst, Pim -- Ellen van der Schoot, C -- Allayee, Hooman -- Attwood, Antony -- Balkau, Beverley -- Bastardot, Francois -- Basu, Saonli -- Baumeister, Sebastian E -- Biino, Ginevra -- Bomba, Lorenzo -- Bonnefond, Amelie -- Cambien, Francois -- Chambers, John C -- Cucca, Francesco -- D'Adamo, Pio -- Davies, Gail -- de Boer, Rudolf A -- de Geus, Eco J C -- Doring, Angela -- Elliott, Paul -- Erdmann, Jeanette -- Evans, David M -- Falchi, Mario -- Feng, Wei -- Folsom, Aaron R -- Frazer, Ian H -- Gibson, Quince D -- Glazer, Nicole L -- Hammond, Chris -- Hartikainen, Anna-Liisa -- Heckbert, Susan R -- Hengstenberg, Christian -- Hersch, Micha -- Illig, Thomas -- Loos, Ruth J F -- Jolley, Jennifer -- Khaw, Kay Tee -- Kuhnel, Brigitte -- Kyrtsonis, Marie-Christine -- Lagou, Vasiliki -- Lloyd-Jones, Heather -- Lumley, Thomas -- Mangino, Massimo -- Maschio, Andrea -- Mateo Leach, Irene -- McKnight, Barbara -- Memari, Yasin -- Mitchell, Braxton D -- Montgomery, Grant W -- Nakamura, Yusuke -- Nauck, Matthias -- Navis, Gerjan -- Nothlings, Ute -- Nolte, Ilja M -- Porteous, David J -- Pouta, Anneli -- Pramstaller, Peter P -- Pullat, Janne -- Ring, Susan M -- Rotter, Jerome I -- Ruggiero, Daniela -- Ruokonen, Aimo -- Sala, Cinzia -- Samani, Nilesh J -- Sambrook, Jennifer -- Schlessinger, David -- Schreiber, Stefan -- Schunkert, Heribert -- Scott, James -- Smith, Nicholas L -- Snieder, Harold -- Starr, John M -- Stumvoll, Michael -- Takahashi, Atsushi -- Tang, W H Wilson -- Taylor, Kent -- Tenesa, Albert -- Lay Thein, Swee -- Tonjes, Anke -- Uda, Manuela -- Ulivi, Sheila -- van Veldhuisen, Dirk J -- Visscher, Peter M -- Volker, Uwe -- Wichmann, H-Erich -- Wiggins, Kerri L -- Willemsen, Gonneke -- Yang, Tsun-Po -- Hua Zhao, Jing -- Zitting, Paavo -- Bradley, John R -- Dedoussis, George V -- Gasparini, Paolo -- Hazen, Stanley L -- Metspalu, Andres -- Pirastu, Mario -- Shuldiner, Alan R -- Joost van Pelt, L -- Zwaginga, Jaap-Jan -- Boomsma, Dorret I -- Deary, Ian J -- Franke, Andre -- Froguel, Philippe -- Ganesh, Santhi K -- Jarvelin, Marjo-Riitta -- Martin, Nicholas G -- Meisinger, Christa -- Psaty, Bruce M -- Spector, Timothy D -- Wareham, Nicholas J -- Akkerman, Jan-Willem N -- Ciullo, Marina -- Deloukas, Panos -- Greinacher, Andreas -- Jupe, Steve -- Kamatani, Naoyuki -- Khadake, Jyoti -- Kooner, Jaspal S -- Penninger, Josef -- Prokopenko, Inga -- Stemple, Derek -- Toniolo, Daniela -- Wernisch, Lorenz -- Sanna, Serena -- Hicks, Andrew A -- Rendon, Augusto -- Ferreira, Manuel A -- Ouwehand, Willem H -- Soranzo, Nicole -- 092731/Wellcome Trust/United Kingdom -- 098051/Wellcome Trust/United Kingdom -- BB/F019394/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- CZB/4/505/Chief Scientist Office/United Kingdom -- ETM/55/Chief Scientist Office/United Kingdom -- G0000111/Medical Research Council/United Kingdom -- G0601966/Medical Research Council/United Kingdom -- G0700704/Medical Research Council/United Kingdom -- G0700931/Medical Research Council/United Kingdom -- G0701120/Medical Research Council/United Kingdom -- G0701863/Medical Research Council/United Kingdom -- G0801056/Medical Research Council/United Kingdom -- G1000143/Medical Research Council/United Kingdom -- K12 RR023250/RR/NCRR NIH HHS/ -- K12 RR023250-05/RR/NCRR NIH HHS/ -- M01 RR016500/RR/NCRR NIH HHS/ -- M01 RR016500-08/RR/NCRR NIH HHS/ -- MC_U105260799/Medical Research Council/United Kingdom -- MC_U106179471/Medical Research Council/United Kingdom -- MC_U106188470/Medical Research Council/United Kingdom -- N01 HC055015/HC/NHLBI NIH HHS/ -- N01 HC055016/HC/NHLBI NIH HHS/ -- N01 HC055018/HC/NHLBI NIH HHS/ -- N01 HC055019/HC/NHLBI NIH HHS/ -- N01 HC055020/HC/NHLBI NIH HHS/ -- N01 HC055021/HC/NHLBI NIH HHS/ -- N01 HC055022/HC/NHLBI NIH HHS/ -- N01 HC085079/HC/NHLBI NIH HHS/ -- P01 HL076491/HL/NHLBI NIH HHS/ -- P01 HL076491-09/HL/NHLBI NIH HHS/ -- P01 HL098055/HL/NHLBI NIH HHS/ -- P01 HL098055-03/HL/NHLBI NIH HHS/ -- P30 DK072488/DK/NIDDK NIH HHS/ -- P30 DK072488-08/DK/NIDDK NIH HHS/ -- P41 HG003751/HG/NHGRI NIH HHS/ -- R01 AG018728/AG/NIA NIH HHS/ -- R01 AG018728-05S1/AG/NIA NIH HHS/ -- R01 GM053275/GM/NIGMS NIH HHS/ -- R01 GM053275-14/GM/NIGMS NIH HHS/ -- R01 HD042157/HD/NICHD NIH HHS/ -- R01 HD042157-01A1/HD/NICHD NIH HHS/ -- R01 HL059367/HL/NHLBI NIH HHS/ -- R01 HL059367-11/HL/NHLBI NIH HHS/ -- R01 HL068986/HL/NHLBI NIH HHS/ -- R01 HL068986-06/HL/NHLBI NIH HHS/ -- R01 HL073410/HL/NHLBI NIH HHS/ -- R01 HL073410-08/HL/NHLBI NIH HHS/ -- R01 HL085251/HL/NHLBI NIH HHS/ -- R01 HL085251-04/HL/NHLBI NIH HHS/ -- R01 HL086694/HL/NHLBI NIH HHS/ -- R01 HL086694-05/HL/NHLBI NIH HHS/ -- R01 HL087641/HL/NHLBI NIH HHS/ -- R01 HL087641-03/HL/NHLBI NIH HHS/ -- R01 HL087679-03/HL/NHLBI NIH HHS/ -- R01 HL088119/HL/NHLBI NIH HHS/ -- R01 HL088119-04/HL/NHLBI NIH HHS/ -- R01 HL103866/HL/NHLBI NIH HHS/ -- R01 HL103866-03/HL/NHLBI NIH HHS/ -- R01 HL105756/HL/NHLBI NIH HHS/ -- RG/09/012/28096/British Heart Foundation/United Kingdom -- RL1 MH083268/MH/NIMH NIH HHS/ -- RL1 MH083268-05/MH/NIMH NIH HHS/ -- U01 GM074518/GM/NIGMS NIH HHS/ -- U01 GM074518-04/GM/NIGMS NIH HHS/ -- U01 HL072515/HL/NHLBI NIH HHS/ -- U01 HL072515-06/HL/NHLBI NIH HHS/ -- U01 HL084756/HL/NHLBI NIH HHS/ -- U01 HL084756-03/HL/NHLBI NIH HHS/ -- U54 RR020278/RR/NCRR NIH HHS/ -- U54 RR020278-06/RR/NCRR NIH HHS/ -- UL1 RR025005/RR/NCRR NIH HHS/ -- UL1 RR025005-05/RR/NCRR NIH HHS/ -- WT077037/Z/05/Z/Wellcome Trust/United Kingdom -- WT077047/Z/05/Z/Wellcome Trust/United Kingdom -- WT082597/Z/07/Z/Wellcome Trust/United Kingdom -- England -- Nature. 2011 Nov 30;480(7376):201-8. doi: 10.1038/nature10659.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Genetic Epidemiology, Helmholtz Zentrum Munchen, German Research Center for Environmental Health, Ingolstadter Landstr 1, 85764 Neuherberg, Germany. christian.gieger@helmholtz-muenchen.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22139419" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Platelets/*cytology/metabolism ; Cell Size ; Drosophila Proteins/genetics ; Drosophila melanogaster/genetics ; Europe ; Gene Expression Profiling ; Gene Silencing ; Genome, Human/genetics ; Genome-Wide Association Study ; Hematopoiesis/*genetics ; Humans ; Megakaryocytes/*cytology/metabolism ; Platelet Count ; Protein Interaction Maps ; Transcription, Genetic/genetics ; Zebrafish/genetics ; Zebrafish Proteins/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 2014-11-20
    Description: MicroRNAs are short non-coding RNAs expressed in different tissue and cell types that suppress the expression of target genes. As such, microRNAs are critical cogs in numerous biological processes, and dysregulated microRNA expression is correlated with many human diseases. Certain microRNAs, called oncomiRs, play a causal role in the onset and maintenance of cancer when overexpressed. Tumours that depend on these microRNAs are said to display oncomiR addiction. Some of the most effective anticancer therapies target oncogenes such as EGFR and HER2; similarly, inhibition of oncomiRs using antisense oligomers (that is, antimiRs) is an evolving therapeutic strategy. However, the in vivo efficacy of current antimiR technologies is hindered by physiological and cellular barriers to delivery into targeted cells. Here we introduce a novel antimiR delivery platform that targets the acidic tumour microenvironment, evades systemic clearance by the liver, and facilitates cell entry via a non-endocytic pathway. We find that the attachment of peptide nucleic acid antimiRs to a peptide with a low pH-induced transmembrane structure (pHLIP) produces a novel construct that could target the tumour microenvironment, transport antimiRs across plasma membranes under acidic conditions such as those found in solid tumours (pH approximately 6), and effectively inhibit the miR-155 oncomiR in a mouse model of lymphoma. This study introduces a new model for using antimiRs as anti-cancer drugs, which can have broad impacts on the field of targeted drug delivery.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4367962/" 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/PMC4367962/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cheng, Christopher J -- Bahal, Raman -- Babar, Imran A -- Pincus, Zachary -- Barrera, Francisco -- Liu, Connie -- Svoronos, Alexander -- Braddock, Demetrios T -- Glazer, Peter M -- Engelman, Donald M -- Saltzman, W Mark -- Slack, Frank J -- 2T32HL007974/HL/NHLBI NIH HHS/ -- F32 CA174247/CA/NCI NIH HHS/ -- F32CA174247/CA/NCI NIH HHS/ -- P30 CA016359/CA/NCI NIH HHS/ -- R00 AG042487/AG/NIA NIH HHS/ -- R01 CA131301/CA/NCI NIH HHS/ -- R01 CA148996/CA/NCI NIH HHS/ -- R01 CA149128/CA/NCI NIH HHS/ -- R01 EB000487/EB/NIBIB NIH HHS/ -- R01 ES005775/ES/NIEHS NIH HHS/ -- R01 GM073857/GM/NIGMS NIH HHS/ -- R01 HL085416/HL/NHLBI NIH HHS/ -- R01CA131301/CA/NCI NIH HHS/ -- R01CA148996/CA/NCI NIH HHS/ -- R01EB000487/EB/NIBIB NIH HHS/ -- R01ES005775/ES/NIEHS NIH HHS/ -- R01GM073857/GM/NIGMS NIH HHS/ -- R01HL085416/HL/NHLBI NIH HHS/ -- T32 GM007205/GM/NIGMS NIH HHS/ -- T32 HL007974/HL/NHLBI NIH HHS/ -- UL1 TR000142/TR/NCATS NIH HHS/ -- England -- Nature. 2015 Feb 5;518(7537):107-10. doi: 10.1038/nature13905. Epub 2014 Nov 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut 06511, USA [2] Department of Biomedical Engineering, Yale University, New Haven, Connecticut 06511, USA [3] Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06511, USA. ; Department of Therapeutic Radiology, Yale University, New Haven, Connecticut 06511, USA. ; Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut 06511, USA. ; Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06511, USA. ; Department of Pathology, Yale University, New Haven, Connecticut 06511, USA. ; Department of Biomedical Engineering, Yale University, New Haven, Connecticut 06511, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25409146" target="_blank"〉PubMed〈/a〉
    Keywords: Acids ; Animals ; Cell Membrane/metabolism ; Cell Membrane Permeability ; Disease Models, Animal ; *Drug Delivery Systems ; Female ; *Gene Expression Regulation, Neoplastic ; *Gene Silencing ; Hydrogen-Ion Concentration ; Lymphoma/*genetics/pathology/*therapy ; Male ; Mice ; MicroRNAs/*antagonists & inhibitors/genetics ; Molecular Targeted Therapy ; Nanoparticles/administration & dosage/chemistry ; Oncogenes/genetics ; Peptide Nucleic Acids/administration & dosage/chemistry/therapeutic use ; *Tumor Microenvironment/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 1996-02-09
    Description: When mammalian cells were treated with triplex-forming oligonucleotides of sufficient binding affinity, mutations were specifically induced in a simian virus 40 vector contained within the cells. Triplex-induced mutagenesis was not detected in xeroderma pigmentosum group A cells nor in Cockayne's syndrome group B cells, indicating a requirement for excision repair and for transcription-coupled repair, respectively, in the process. Triplex formation was also found to stimulate DNA repair synthesis in human cell extracts, in a pattern correlating with the inhibition of transcription in such extracts. These findings may have implications for therapeutic applications of triplex DNA and raise the possibility that naturally occurring triple helices are a source of genetic instability.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, G -- Seidman, M M -- Glazer, P M -- CA64186/CA/NCI NIH HHS/ -- ES05775/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 1996 Feb 9;271(5250):802-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT 06520-8040, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8628995" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cell Line ; DNA/biosynthesis/*metabolism ; *DNA Repair ; Genetic Vectors ; Haplorhini ; HeLa Cells ; Humans ; Molecular Sequence Data ; *Mutagenesis ; Oligodeoxyribonucleotides/*metabolism ; Point Mutation ; Sequence Deletion ; *Transcription, Genetic ; Transfection
    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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  • 6
    Publication Date: 1980-06-27
    Description: Nerve processes and cell bodies containing leucine enkephalin were demonstrated in the sacral autonomic nucleus of the cat by immunocytochemical methods. Enkephalinergic preganglionic perikarya were seen only when axonal transport was blocked either by colchicine or by ventral root ligation. Ligation of the sacral ventral roots also produced damming of enkephalin immunoreactivity proximal to the S2 ligature. These data indicate that parasympathetic preganglionic neurons synthesize and transport enkephalin or enkephalin-like immunoreactive compounds to the periphery.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Glazer, E J -- Basbaum, A I -- New York, N.Y. -- Science. 1980 Jun 27;208(4451):1479-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6155697" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Axonal Transport ; Cats ; Enkephalin, Leucine ; Enkephalins/analysis/metabolism ; Histocytochemistry ; Immunoassay ; Neurons/*analysis ; Spinal Cord/analysis/*metabolism
    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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  • 7
    Publication Date: 1987-02-27
    Description: Bilirubin, the end product of heme catabolism in mammals, is generally regarded as a potentially cytotoxic, lipid-soluble waste product that needs to be excreted. However, it is here that bilirubin, at micromolar concentrations in vitro, efficiently scavenges peroxyl radicals generated chemically in either homogeneous solution or multilamellar liposomes. The antioxidant activity of bilirubin increases as the experimental concentration of oxygen is decreased from 20% (that of normal air) to 2% (physiologically relevant concentration). Furthermore, under 2% oxygen, in liposomes, bilirubin suppresses the oxidation more than alpha-tocopherol, which is regarded as the best antioxidant of lipid peroxidation. The data support the idea of a "beneficial" role for bilirubin as a physiological, chain-breaking antioxidant.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stocker, R -- Yamamoto, Y -- McDonagh, A F -- Glazer, A N -- Ames, B N -- AM 26307/AM/NIADDK NIH HHS/ -- CA 39910/CA/NCI NIH HHS/ -- ES 01896/ES/NIEHS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1987 Feb 27;235(4792):1043-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3029864" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antioxidants ; Bilirubin/*physiology ; Biliverdine/metabolism ; Carotenoids/pharmacology ; Free Radicals ; Humans ; Hydrogen Peroxide ; Linoleic Acid ; Linoleic Acids/metabolism ; Liposomes/metabolism ; Oxidation-Reduction ; Oxygen/pharmacology ; Photochemistry ; Superoxides ; Vitamin E/pharmacology ; beta Carotene
    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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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of applied phycology 6 (1994), S. 105-112 
    ISSN: 1573-5176
    Keywords: cyanobacteria ; red algae ; phycobiliproteins ; bilins ; energy transfer ; fluorescent tags
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Phycobiliproteins are brilliantly colored, highly fluorescent components of the photosynthetic light-harvesting antenna complexes of cyanobacteria (blue-green algae), red algae and cryptomonads. These proteins carry covalently attached linear tetrapyrrole pigments related structurally to biliverdin. Phycobiliproteins, purified from certain organisms, are isolated as either trimers, (αβ)3, of approximatelyM r 110–120×103 (e.g., allophycocyanins), or hexamers, (αβ)6γ, of aboutM r 250×103 (certain phycoerythrins). Three phycobiliproteins R-phycoerythrin, B-phycoerythrin, and allophycocyanin serve as valuable fluorescent tags with numerous applications in flow cytometry, fluorescence activated cell sorting, histochemistry and, to a limited degree, in immunoassay and detection of reactive oxygen species. These applications exploit the unique physical and spectroscopic properties of phycobiliproteins.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Photosynthesis research 48 (1996), S. 163-170 
    ISSN: 1573-5079
    Keywords: energy transfer ; light-harvesting pigments ; linear tetrapyrrole ; photosynthetic antennae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two crytophycean phycocyanins (Cr-PCs), Hemiselmis strain HP9001 Cr-PC 612 and Falcomonas daucoides Cr-PC 69 were purified and characterized with respect to bilin numbers, types and locations. Each biliprotein carried one bilin on the α subunit and three on the β subunit. Cr-PC 612 carried phycocyanobilin at α-Cys-18, β-Cys-82, and β-Cys-158, and a doubly-linked 15,16-dihydrobiliverdin at β-DiCys-50,61. Cr-PC 569 carried phycocyanobilin at α-Cys-18 and β-Cys-82, a singly-linked Bilin 584 at β-Cys-158, and a doubly-linked Bilin 584 at β-DiCys-50,61. This work, in conjunction with earlier studies on Cr-PE 545, Cr-PE 555, Cr-PE 566, and Cr-PC 645, shows that there is no conserved location for the bilin with longest wavelength visible absorption band among these proteins, and, consequently, that there is no conserved energy transfer pathway common to all native cryptophycean biliproteins. Only phycocyanobilin or phycoerythrobilin is found at β-Cys-82; there is greater bilin variability at the other three attachment sites.
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  • 10
    Electronic Resource
    Electronic Resource
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 22 (1983), S. 1-14 
    ISSN: 0730-2312
    Keywords: cyanobacteria ; phycobilisome substructure ; allophycocyanin complexes ; biliproteins ; energy transfer ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: The tricylindrical core of Synechocystis 6701 phycobilisomes is made up of four types of allophycocyanin-containing complexes: A, (αAP βAP)3; B, (αAP βAP)3 .10K; C, (α1APBα2APβ3AP).10K; D, (αAP βAP)2.18.5K.99K; where AP is allophycocyanin, APB is allophycocyanin B, and 10K, 18.5K, and 99K are polypeptides of 10,000, 18,500, and 99,000 daltons, respectively. The 18.5K polypeptide is a hitherto unrecognized biliprotein subunit with a single phycocyanobilin prosthetic group. The tricylindrical core is made up of 12 subcomplexes in the molar ratio of A:B:C:D: of 4:4:2:2. Complexes C and D act as terminal energy acceptors. From these results and previous analysis of the bicylindrical core of Synechococcus 6301 phycobilisomes [14,15] it is proposed that the two cylinders of the Synechocystis 6701 core, proximal to the thylakoid membrane, each have the composition ABCD, and that the distal cylinder has the composition A2B2.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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