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  • 1
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    Molecular basis of T cell inactivation by CTLA-4 (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-12-18
    Description: CTLA-4, a negative regulator of T cell function, was found to associate with the T cell receptor (TCR) complex zeta chain in primary T cells. The association of TCRzeta with CTLA-4, reconstituted in 293 transfectants, was enhanced by p56(lck)-induced tyrosine phosphorylation. Coexpression of the CTLA-4-associated tyrosine phosphatase, SHP-2, resulted in dephosphorylation of TCRzeta bound to CTLA-4 and abolished the p56(lck)-inducible TCRzeta-CTLA-4 interaction. Thus, CTLA-4 inhibits TCR signal transduction by binding to TCRzeta and inhibiting tyrosine phosphorylation after T cell activation. These findings have broad implications for the negative regulation of T cell function and T cell tolerance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, K M -- Chuang, E -- Griffin, M -- Khattri, R -- Hong, D K -- Zhang, W -- Straus, D -- Samelson, L E -- Thompson, C B -- Bluestone, J A -- P01 AI35294-6/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1998 Dec 18;282(5397):2263-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ben May Institute for Cancer Research, and Committee on Immunology, University of Chicago, Chicago, IL 60637, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9856951" target="_blank"〉PubMed〈/a〉
    Keywords: Abatacept ; Animals ; Antigens, CD ; Antigens, Differentiation/*metabolism ; CTLA-4 Antigen ; Cell Line ; Cells, Cultured ; Humans ; *Immunoconjugates ; Intracellular Signaling Peptides and Proteins ; *Lymphocyte Activation ; Lymphocyte Specific Protein Tyrosine Kinase p56(lck)/genetics/metabolism ; Membrane Proteins/*metabolism ; Mice ; Mice, Inbred BALB C ; Models, Immunological ; Phosphorylation ; Phosphotyrosine/metabolism ; Protein Tyrosine Phosphatase, Non-Receptor Type 11 ; Protein Tyrosine Phosphatase, Non-Receptor Type 6 ; Protein Tyrosine Phosphatases/genetics/metabolism ; Receptors, Antigen, T-Cell/*metabolism ; Recombinant Fusion Proteins/metabolism ; SH2 Domain-Containing Protein Tyrosine Phosphatases ; *Signal Transduction ; T-Lymphocytes/*immunology ; Transfection ; src Homology Domains
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Proapoptotic BAX and BAK: a requisite gateway to mitochondrial dysfunction and death (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-28
    Description: Multiple death signals influence mitochondria during apoptosis, yet the critical initiating event for mitochondrial dysfunction in vivo has been unclear. tBID, the caspase-activated form of a "BH3-domain-only" BCL-2 family member, triggers the homooligomerization of "multidomain" conserved proapoptotic family members BAK or BAX, resulting in the release of cytochrome c from mitochondria. We find that cells lacking both Bax and Bak, but not cells lacking only one of these components, are completely resistant to tBID-induced cytochrome c release and apoptosis. Moreover, doubly deficient cells are resistant to multiple apoptotic stimuli that act through disruption of mitochondrial function: staurosporine, ultraviolet radiation, growth factor deprivation, etoposide, and the endoplasmic reticulum stress stimuli thapsigargin and tunicamycin. Thus, activation of a "multidomain" proapoptotic member, BAX or BAK, appears to be an essential gateway to mitochondrial dysfunction required for cell death in response to diverse stimuli.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3049805/" 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/PMC3049805/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wei, M C -- Zong, W X -- Cheng, E H -- Lindsten, T -- Panoutsakopoulou, V -- Ross, A J -- Roth, K A -- MacGregor, G R -- Thompson, C B -- Korsmeyer, S J -- 5T32AT09361/AT/NCCIH NIH HHS/ -- R01 HD036437-02/HD/NICHD NIH HHS/ -- R01 HD036437-03/HD/NICHD NIH HHS/ -- R01 HD036437-04/HD/NICHD NIH HHS/ -- R01 HD036437-05/HD/NICHD NIH HHS/ -- R01CA50239/CA/NCI NIH HHS/ -- R37CA4802/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2001 Apr 27;292(5517):727-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Departments of Pathology and Medicine, Harvard Medical School, Dana-Farber Cancer Institute, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11326099" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies ; Antigens, CD95/immunology/physiology ; Apoptosis/*physiology ; BH3 Interacting Domain Death Agonist Protein ; Biopolymers ; Carrier Proteins/genetics/metabolism ; Cells, Cultured ; Cytochrome c Group/metabolism ; Endoplasmic Reticulum/metabolism ; Etoposide/pharmacology ; Hepatocytes/cytology/metabolism ; Intracellular Membranes/metabolism ; Membrane Proteins/genetics/*metabolism ; Mice ; Mitochondria/*metabolism ; Protein Structure, Tertiary ; Proto-Oncogene Proteins/genetics/*metabolism ; *Proto-Oncogene Proteins c-bcl-2 ; Signal Transduction ; Staurosporine/pharmacology ; Transfection ; Ultraviolet Rays ; bcl-2 Homologous Antagonist-Killer Protein ; bcl-2-Associated X Protein
    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
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    Signaling kinase AMPK activates stress-promoted transcription via histone H2B phosphorylation (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-07-22
    Description: The mammalian adenosine monophosphate-activated protein kinase (AMPK) is a serine-threonine kinase protein complex that is a central regulator of cellular energy homeostasis. However, the mechanisms by which AMPK mediates cellular responses to metabolic stress remain unclear. We found that AMPK activates transcription through direct association with chromatin and phosphorylation of histone H2B at serine 36. AMPK recruitment and H2B Ser36 phosphorylation colocalized within genes activated by AMPK-dependent pathways, both in promoters and in transcribed regions. Ectopic expression of H2B in which Ser36 was substituted by alanine reduced transcription and RNA polymerase II association to AMPK-dependent genes, and lowered cell survival in response to stress. Our results place AMPK-dependent H2B Ser36 phosphorylation in a direct transcriptional and chromatin regulatory pathway leading to cellular adaptation to stress.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3922052/" 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/PMC3922052/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bungard, David -- Fuerth, Benjamin J -- Zeng, Ping-Yao -- Faubert, Brandon -- Maas, Nancy L -- Viollet, Benoit -- Carling, David -- Thompson, Craig B -- Jones, Russell G -- Berger, Shelley L -- CA078831/CA/NCI NIH HHS/ -- CA09171/CA/NCI NIH HHS/ -- CA105463/CA/NCI NIH HHS/ -- MC_U120027537/Medical Research Council/United Kingdom -- MOP-93799/Canadian Institutes of Health Research/Canada -- P01 AG031862/AG/NIA NIH HHS/ -- P01 CA104838/CA/NCI NIH HHS/ -- R01 CA078831/CA/NCI NIH HHS/ -- R01 CA105463/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 3;329(5996):1201-5. doi: 10.1126/science.1191241. Epub 2010 Jul 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cellular and Developmental Biology, University of Pennsylvania Medical School, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20647423" target="_blank"〉PubMed〈/a〉
    Keywords: AMP-Activated Protein Kinases/chemistry/*metabolism ; Adaptation, Physiological ; Amino Acid Motifs ; Amino Acid Substitution ; Animals ; Cell Line ; Cell Line, Tumor ; Cell Survival ; Cells, Cultured ; Chromatin/*metabolism ; Chromatin Immunoprecipitation ; Enzyme Activation ; Gene Expression Regulation ; Histones/chemistry/*metabolism ; Humans ; Mice ; Phosphorylation ; Promoter Regions, Genetic ; Protein-Serine-Threonine Kinases/genetics/metabolism ; Serine/metabolism ; Signal Transduction ; *Stress, Physiological ; *Transcription, Genetic ; Tumor Suppressor Protein p53/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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  • 4
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    The PP2A-associated protein alpha4 is an essential inhibitor of apoptosis (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-10-23
    Description: Despite evidence that protein kinases are regulators of apoptosis, a specific role for phosphatases in regulating cell survival has not been established. Here we show that alpha4, a noncatalytic subunit of protein phosphatase 2A (PP2A), is required to repress apoptosis in murine cells. alpha4 is a nonredundant regulator of the dephosphorylation of the transcription factors c-Jun and p53. As a result of alpha4 deletion, multiple proapoptotic genes were transcribed. Either inhibition of new protein synthesis or Bcl-xL overexpression suppressed apoptosis initiated by alpha4 deletion. Thus, mammalian cell viability depends on repression of transcription-initiated apoptosis mediated by a component of PP2A.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kong, Mei -- Fox, Casey J -- Mu, James -- Solt, Laura -- Xu, Anne -- Cinalli, Ryan M -- Birnbaum, Morris J -- Lindsten, Tullia -- Thompson, Craig B -- New York, N.Y. -- Science. 2004 Oct 22;306(5696):695-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Abramson Family Cancer Research Institute, University of Pennsylvania, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15499020" target="_blank"〉PubMed〈/a〉
    Keywords: Adipocytes/cytology ; Animals ; *Apoptosis ; Cell Differentiation ; Cell Line ; Cell Survival ; Cells, Cultured ; Cycloheximide/pharmacology ; Gene Deletion ; Gene Expression Profiling ; Liver/cytology/metabolism ; Mice ; Mice, Transgenic ; Oligonucleotide Array Sequence Analysis ; PPAR gamma/metabolism ; Phosphoprotein Phosphatases/*metabolism ; Phosphoproteins/*metabolism ; Phosphorylation ; Protein Phosphatase 2 ; Protein Synthesis Inhibitors/pharmacology ; Proto-Oncogene Proteins c-bcl-2/metabolism ; Proto-Oncogene Proteins c-jun/metabolism ; Transcription, Genetic ; Tumor Suppressor Protein p53/metabolism ; bcl-X Protein
    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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  • 5
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    Ars2 maintains neural stem-cell identity through direct transcriptional activation of Sox2 (2011)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2011-12-27
    Description: Fundamental questions remain unanswered about the transcriptional networks that control the identity and self-renewal of neural stem cells (NSCs), a specialized subset of astroglial cells that are endowed with stem properties and neurogenic capacity. Here we report that the zinc finger protein Ars2 (arsenite-resistance protein 2; also known as Srrt) is expressed by adult NSCs from the subventricular zone (SVZ) of mice, and that selective knockdown of Ars2 in cells expressing glial fibrillary acidic protein within the adult SVZ depletes the number of NSCs and their neurogenic capacity. These phenotypes are recapitulated in the postnatal SVZ of hGFAP-cre::Ars2(fl/fl) conditional knockout mice, but are more severe. Ex vivo assays show that Ars2 is necessary and sufficient to promote NSC self-renewal, and that it does so by positively regulating the expression of Sox2. Although plant and animal orthologues of Ars2 are known for their conserved roles in microRNA biogenesis, we unexpectedly observed that Ars2 retains its capacity to promote self-renewal in Drosha and Dicer1 knockout NSCs. Instead, chromatin immunoprecipitation revealed that Ars2 binds a specific region within the 6-kilobase NSC enhancer of Sox2. This association is RNA-independent, and the region that is bound is required for Ars2-mediated activation of Sox2. We used gel-shift analysis to refine the Sox2 region bound by Ars2 to a specific conserved DNA sequence. The importance of Sox2 as a critical downstream effector is shown by its ability to restore the self-renewal and multipotency defects of Ars2 knockout NSCs. Our findings reveal Ars2 as a new transcription factor that controls the multipotent progenitor state of NSCs through direct activation of the pluripotency factor Sox2.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3261657/" 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/PMC3261657/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Andreu-Agullo, Celia -- Maurin, Thomas -- Thompson, Craig B -- Lai, Eric C -- R01 GM083300/GM/NIGMS NIH HHS/ -- R01 GM083300-05/GM/NIGMS NIH HHS/ -- R01-GM083300/GM/NIGMS NIH HHS/ -- England -- Nature. 2011 Dec 25;481(7380):195-8. doi: 10.1038/nature10712.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Developmental Biology, Sloan-Kettering Institute, 1275 York Avenue, Box 252, New York, New York 10065, USA. andreuac@mskcc.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22198669" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*cytology ; Cell Proliferation ; Cells, Cultured ; Chromatin Immunoprecipitation ; Conserved Sequence/genetics ; DEAD-box RNA Helicases/deficiency ; Electrophoretic Mobility Shift Assay ; Enhancer Elements, Genetic/genetics ; Glial Fibrillary Acidic Protein/metabolism ; Mice ; Mice, Knockout ; Neural Stem Cells/*cytology/*metabolism ; Neurogenesis/genetics ; Nuclear Proteins/chemistry/deficiency/genetics/*metabolism ; Olfactory Bulb/cytology ; Ribonuclease III/deficiency ; SOXB1 Transcription Factors/*genetics ; Transcription Factors/chemistry/deficiency/genetics/*metabolism ; *Transcriptional Activation ; Zinc Fingers
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 6
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    IDH1 mutation is sufficient to establish the glioma hypermethylator phenotype (2012)
    Nature Publishing Group (NPG)
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    Publication Date: 2012-02-22
    Description: Both genome-wide genetic and epigenetic alterations are fundamentally important for the development of cancers, but the interdependence of these aberrations is poorly understood. Glioblastomas and other cancers with the CpG island methylator phenotype (CIMP) constitute a subset of tumours with extensive epigenomic aberrations and a distinct biology. Glioma CIMP (G-CIMP) is a powerful determinant of tumour pathogenicity, but the molecular basis of G-CIMP remains unresolved. Here we show that mutation of a single gene, isocitrate dehydrogenase 1 (IDH1), establishes G-CIMP by remodelling the methylome. This remodelling results in reorganization of the methylome and transcriptome. Examination of the epigenome of a large set of intermediate-grade gliomas demonstrates a distinct G-CIMP phenotype that is highly dependent on the presence of IDH mutation. Introduction of mutant IDH1 into primary human astrocytes alters specific histone marks, induces extensive DNA hypermethylation, and reshapes the methylome in a fashion that mirrors the changes observed in G-CIMP-positive lower-grade gliomas. Furthermore, the epigenomic alterations resulting from mutant IDH1 activate key gene expression programs, characterize G-CIMP-positive proneural glioblastomas but not other glioblastomas, and are predictive of improved survival. Our findings demonstrate that IDH mutation is the molecular basis of CIMP in gliomas, provide a framework for understanding oncogenesis in these gliomas, and highlight the interplay between genomic and epigenomic changes in human cancers.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3351699/" 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/PMC3351699/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Turcan, Sevin -- Rohle, Daniel -- Goenka, Anuj -- Walsh, Logan A -- Fang, Fang -- Yilmaz, Emrullah -- Campos, Carl -- Fabius, Armida W M -- Lu, Chao -- Ward, Patrick S -- Thompson, Craig B -- Kaufman, Andrew -- Guryanova, Olga -- Levine, Ross -- Heguy, Adriana -- Viale, Agnes -- Morris, Luc G T -- Huse, Jason T -- Mellinghoff, Ingo K -- Chan, Timothy A -- R01 CA154767/CA/NCI NIH HHS/ -- R01CA154767-01/CA/NCI NIH HHS/ -- U54 CA143798/CA/NCI NIH HHS/ -- U54-CA143798/CA/NCI NIH HHS/ -- England -- Nature. 2012 Feb 15;483(7390):479-83. doi: 10.1038/nature10866.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Human Oncology and Pathogenesis Program, Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22343889" target="_blank"〉PubMed〈/a〉
    Keywords: Astrocytes/cytology/metabolism ; Cell Survival/genetics ; Cells, Cultured ; CpG Islands/genetics ; DNA Methylation/*genetics ; Epigenesis, Genetic ; Epigenomics ; Gene Expression Regulation ; Glioblastoma/genetics/pathology ; Glioma/*genetics/pathology ; HEK293 Cells ; Histones/metabolism ; Humans ; Isocitrate Dehydrogenase/*genetics/metabolism ; Metabolome/genetics ; Mutation/*genetics ; *Phenotype ; Tumor Cells, Cultured
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 7
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    Macropinocytosis of protein is an amino acid supply route in Ras-transformed cells (2013)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2013-05-15
    Description: Macropinocytosis is a highly conserved endocytic process by which extracellular fluid and its contents are internalized into cells through large, heterogeneous vesicles known as macropinosomes. Oncogenic Ras proteins have been shown to stimulate macropinocytosis but the functional contribution of this uptake mechanism to the transformed phenotype remains unknown. Here we show that Ras-transformed cells use macropinocytosis to transport extracellular protein into the cell. The internalized protein undergoes proteolytic degradation, yielding amino acids including glutamine that can enter central carbon metabolism. Accordingly, the dependence of Ras-transformed cells on free extracellular glutamine for growth can be suppressed by the macropinocytic uptake of protein. Consistent with macropinocytosis representing an important route of nutrient uptake in tumours, its pharmacological inhibition compromises the growth of Ras-transformed pancreatic tumour xenografts. These results identify macropinocytosis as a mechanism by which cancer cells support their unique metabolic needs and point to the possible exploitation of this process in the design of anticancer therapies.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3810415/" 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/PMC3810415/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Commisso, Cosimo -- Davidson, Shawn M -- Soydaner-Azeloglu, Rengin G -- Parker, Seth J -- Kamphorst, Jurre J -- Hackett, Sean -- Grabocka, Elda -- Nofal, Michel -- Drebin, Jeffrey A -- Thompson, Craig B -- Rabinowitz, Joshua D -- Metallo, Christian M -- Vander Heiden, Matthew G -- Bar-Sagi, Dafna -- 5 P30CA016087-32/CA/NCI NIH HHS/ -- P01 CA104838/CA/NCI NIH HHS/ -- P01 CA117969/CA/NCI NIH HHS/ -- P01-CA117969/CA/NCI NIH HHS/ -- P30 CA014051/CA/NCI NIH HHS/ -- P30-CA14051-39/CA/NCI NIH HHS/ -- R01 CA055360/CA/NCI NIH HHS/ -- R01 CA105463/CA/NCI NIH HHS/ -- R01 CA163591/CA/NCI NIH HHS/ -- R01CA055360/CA/NCI NIH HHS/ -- Canadian Institutes of Health Research/Canada -- England -- Nature. 2013 May 30;497(7451):633-7. doi: 10.1038/nature12138. Epub 2013 May 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, New York 10016, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23665962" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids/*metabolism ; Animals ; Biological Transport ; Carbon/metabolism ; Cell Line, Transformed ; Cell Line, Tumor ; Cell Proliferation ; *Cell Transformation, Neoplastic/genetics ; Disease Models, Animal ; Female ; Glutamine/metabolism ; Mice ; Mice, Nude ; NIH 3T3 Cells ; Oncogene Protein p21(ras)/genetics/*metabolism ; Pancreatic Neoplasms/genetics/*metabolism/*pathology ; *Pinocytosis ; Proteolysis
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 8
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    Lymphoproliferative disorders with early lethality in mice deficient in Ctla-4 (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-11-10
    Description: The role of the cell-surface molecule CTLA-4 in the regulation of T cell activation has been controversial. Here, lymph nodes and spleens of CTLA-4-deficient mice accumulated T cell blasts with up-regulated activation markers. These blast cells also infiltrated liver, heart, lung, and pancreas tissue, and amounts of serum immunoglobulin were elevated. The mice invariably became moribund by 3 to 4 weeks of age. Although CTLA-4-deficient T cells proliferated spontaneously and strongly when stimulated through the T cell receptor, they were sensitive to cell death induced by cross-linking of the Fas receptor and by gamma irradiation. Thus, CTLA-4 acts as a negative regulator of T cell activation and is vital for the control of lymphocyte homeostasis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Waterhouse, P -- Penninger, J M -- Timms, E -- Wakeham, A -- Shahinian, A -- Lee, K P -- Thompson, C B -- Griesser, H -- Mak, T W -- New York, N.Y. -- Science. 1995 Nov 10;270(5238):985-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, University of Toronto, Ontario, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7481803" target="_blank"〉PubMed〈/a〉
    Keywords: Abatacept ; Animals ; Antigens, CD/analysis ; Antigens, CD95/metabolism ; Antigens, Differentiation/genetics/*physiology ; Apoptosis ; B-Lymphocytes/immunology ; CTLA-4 Antigen ; Cells, Cultured ; Concanavalin A/pharmacology ; Female ; Gamma Rays ; Gene Targeting ; Homeostasis ; *Immunoconjugates ; Immunoglobulins/blood ; Immunophenotyping ; Lymph Nodes/immunology/pathology ; *Lymphocyte Activation ; Lymphoproliferative Disorders/*immunology/pathology ; Male ; Mice ; Mice, Inbred C57BL ; Spleen/immunology/pathology ; 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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  • 9
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    ATP-citrate lyase links cellular metabolism to histone acetylation (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-05-23
    Description: Histone acetylation in single-cell eukaryotes relies on acetyl coenzyme A (acetyl-CoA) synthetase enzymes that use acetate to produce acetyl-CoA. Metazoans, however, use glucose as their main carbon source and have exposure only to low concentrations of extracellular acetate. We have shown that histone acetylation in mammalian cells is dependent on adenosine triphosphate (ATP)-citrate lyase (ACL), the enzyme that converts glucose-derived citrate into acetyl-CoA. We found that ACL is required for increases in histone acetylation in response to growth factor stimulation and during differentiation, and that glucose availability can affect histone acetylation in an ACL-dependent manner. Together, these findings suggest that ACL activity is required to link growth factor-induced increases in nutrient metabolism to the regulation of histone acetylation and gene expression.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2746744/" 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/PMC2746744/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wellen, Kathryn E -- Hatzivassiliou, Georgia -- Sachdeva, Uma M -- Bui, Thi V -- Cross, Justin R -- Thompson, Craig B -- R01 CA092660/CA/NCI NIH HHS/ -- R01 CA092660-09/CA/NCI NIH HHS/ -- R01 CA105463/CA/NCI NIH HHS/ -- T32-HL07439-27/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2009 May 22;324(5930):1076-80. doi: 10.1126/science.1164097.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cancer Biology, Abramson Family Cancer Research Institute, University of Pennsylvania, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19461003" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; ATP Citrate (pro-S)-Lyase/genetics/*metabolism ; Acetate-CoA Ligase/genetics/metabolism ; Acetyl Coenzyme A/metabolism ; Acetylation ; Adipocytes/cytology/metabolism ; Animals ; Cell Differentiation ; Cell Line ; Cell Line, Tumor ; Cell Nucleus/enzymology ; Cell Proliferation ; Citric Acid/metabolism ; Cytoplasm/enzymology ; Gene Expression Regulation ; Glucose/*metabolism ; Glycolysis ; Histone Deacetylase Inhibitors ; Histone Deacetylases/metabolism ; Histones/*metabolism ; Humans ; Intercellular Signaling Peptides and Proteins/metabolism ; Interleukin-3/metabolism ; Mice ; RNA Interference ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 10
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    AMPK regulates the circadian clock by cryptochrome phosphorylation and degradation (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-10-17
    Description: Circadian clocks coordinate behavioral and physiological processes with daily light-dark cycles by driving rhythmic transcription of thousands of genes. Whereas the master clock in the brain is set by light, pacemakers in peripheral organs, such as the liver, are reset by food availability, although the setting, or "entrainment," mechanisms remain mysterious. Studying mouse fibroblasts, we demonstrated that the nutrient-responsive adenosine monophosphate-activated protein kinase (AMPK) phosphorylates and destabilizes the clock component cryptochrome 1 (CRY1). In mouse livers, AMPK activity and nuclear localization were rhythmic and inversely correlated with CRY1 nuclear protein abundance. Stimulation of AMPK destabilized cryptochromes and altered circadian rhythms, and mice in which the AMPK pathway was genetically disrupted showed alterations in peripheral clocks. Thus, phosphorylation by AMPK enables cryptochrome to transduce nutrient signals to circadian clocks in mammalian peripheral organs.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2819106/" 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/PMC2819106/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lamia, Katja A -- Sachdeva, Uma M -- DiTacchio, Luciano -- Williams, Elliot C -- Alvarez, Jacqueline G -- Egan, Daniel F -- Vasquez, Debbie S -- Juguilon, Henry -- Panda, Satchidananda -- Shaw, Reuben J -- Thompson, Craig B -- Evans, Ronald M -- CA104838/CA/NCI NIH HHS/ -- DK057978/DK/NIDDK NIH HHS/ -- DK062434/DK/NIDDK NIH HHS/ -- DK080425/DK/NIDDK NIH HHS/ -- EY016807/EY/NEI NIH HHS/ -- P01 CA104838/CA/NCI NIH HHS/ -- P01 CA104838-05S1/CA/NCI NIH HHS/ -- P30 CA014195/CA/NCI NIH HHS/ -- R01 DK080425/DK/NIDDK NIH HHS/ -- R01 DK080425-03/DK/NIDDK NIH HHS/ -- R01 EY016807/EY/NEI NIH HHS/ -- R01 EY016807-03/EY/NEI NIH HHS/ -- R37 DK057978/DK/NIDDK NIH HHS/ -- R37 DK057978-31/DK/NIDDK NIH HHS/ -- T32 HL007439/HL/NHLBI NIH HHS/ -- T32 HL007439-27/HL/NHLBI NIH HHS/ -- T32-HL07439-27/HL/NHLBI NIH HHS/ -- U19 DK062434/DK/NIDDK NIH HHS/ -- U19 DK062434-08S19002/DK/NIDDK NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2009 Oct 16;326(5951):437-40. doi: 10.1126/science.1172156.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Gene Expression Laboratory, the Salk Institute, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19833968" target="_blank"〉PubMed〈/a〉
    Keywords: AMP-Activated Protein Kinases/*metabolism ; ARNTL Transcription Factors ; Amino Acid Substitution ; Aminoimidazole Carboxamide/analogs & derivatives/pharmacology ; Animals ; Basic Helix-Loop-Helix Transcription Factors/genetics ; Cell Line ; Cell Nucleus/metabolism ; Cells, Cultured ; Circadian Rhythm/*physiology ; Cryptochromes ; Culture Media ; Flavoproteins/genetics/*metabolism ; Food ; Glucose/metabolism/pharmacology ; Humans ; Liver/*metabolism ; Mice ; Mutagenesis, Site-Directed ; Mutant Proteins/metabolism ; Phosphorylation ; Promoter Regions, Genetic ; Protein Stability ; Recombinant Fusion Proteins/metabolism ; Ribonucleotides/pharmacology ; Signal Transduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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