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  • 1
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    Medulloblastoma growth inhibition by hedgehog pathway blockade (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-08-31
    Description: Constitutive Hedgehog (Hh) pathway activity is associated with initiation of neoplasia, but its role in the continued growth of established tumors is unclear. Here, we investigate the therapeutic efficacy of the Hh pathway antagonist cyclopamine in preclinical models of medulloblastoma, the most common malignant brain tumor in children. Cyclopamine treatment of murine medulloblastoma cells blocked proliferation in vitro and induced changes in gene expression consistent with initiation of neuronal differentiation and loss of neuronal stem cell-like character. This compound also caused regression of murine tumor allografts in vivo and induced rapid death of cells from freshly resected human medulloblastomas, but not from other brain tumors, thus establishing a specific role for Hh pathway activity in medulloblastoma growth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Berman, David M -- Karhadkar, Sunil S -- Hallahan, Andrew R -- Pritchard, Joel I -- Eberhart, Charles G -- Watkins, D Neil -- Chen, James K -- Cooper, Michael K -- Taipale, Jussi -- Olson, James M -- Beachy, Philip A -- New York, N.Y. -- Science. 2002 Aug 30;297(5586):1559-61.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12202832" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents/*therapeutic use ; Bicuculline/*therapeutic use ; Cell Differentiation/drug effects ; Cell Division/drug effects ; Cerebellar Neoplasms/*drug therapy ; Disease Models, Animal ; Hedgehog Proteins ; Humans ; Medulloblastoma/*drug therapy ; Membrane Proteins/genetics ; Mice ; Mice, Nude ; Receptors, Cell Surface ; Signal Transduction/drug effects ; Trans-Activators/*antagonists & inhibitors/metabolism ; Tumor Cells, Cultured
    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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    Interference by huntingtin and atrophin-1 with cbp-mediated transcription leading to cellular toxicity (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-27
    Description: Expanded polyglutamine repeats have been proposed to cause neuronal degeneration in Huntington's disease (HD) and related disorders, through abnormal interactions with other proteins containing short polyglutamine tracts such as the transcriptional coactivator CREB binding protein, CBP. We found that CBP was depleted from its normal nuclear location and was present in polyglutamine aggregates in HD cell culture models, HD transgenic mice, and human HD postmortem brain. Expanded polyglutamine repeats specifically interfere with CBP-activated gene transcription, and overexpression of CBP rescued polyglutamine-induced neuronal toxicity. Thus, polyglutamine-mediated interference with CBP-regulated gene transcription may constitute a genetic gain of function, underlying the pathogenesis of polyglutamine disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nucifora , F C Jr -- Sasaki, M -- Peters, M F -- Huang, H -- Cooper, J K -- Yamada, M -- Takahashi, H -- Tsuji, S -- Troncoso, J -- Dawson, V L -- Dawson, T M -- Ross, C A -- NS16375/NS/NINDS NIH HHS/ -- NS34172/NS/NINDS NIH HHS/ -- NS37090/NS/NINDS NIH HHS/ -- NS38144/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2001 Mar 23;291(5512):2423-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neurobiology, Department of Psychiatry, The Johns Hopkins University School of Medicine, Baltimore, MD 21205-2196, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11264541" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/metabolism ; CREB-Binding Protein ; Cell Nucleus/metabolism ; Cell Survival ; Cells, Cultured ; Humans ; Huntington Disease/genetics/*metabolism ; Mice ; Mice, Transgenic ; Mutation ; Nerve Tissue Proteins/chemistry/genetics/*metabolism ; Neurons/cytology/*metabolism ; Nuclear Proteins/chemistry/genetics/*metabolism ; Peptides/chemistry/*metabolism ; Repetitive Sequences, Amino Acid ; Trans-Activators/chemistry/*metabolism ; *Transcription, Genetic ; Transfection ; Tumor Cells, Cultured
    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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    HIF-independent regulation of VEGF and angiogenesis by the transcriptional coactivator PGC-1alpha (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-02-22
    Description: Ischaemia of the heart, brain and limbs is a leading cause of morbidity and mortality worldwide. Hypoxia stimulates the secretion of vascular endothelial growth factor (VEGF) and other angiogenic factors, leading to neovascularization and protection against ischaemic injury. Here we show that the transcriptional coactivator PGC-1alpha (peroxisome-proliferator-activated receptor-gamma coactivator-1alpha), a potent metabolic sensor and regulator, is induced by a lack of nutrients and oxygen, and PGC-1alpha powerfully regulates VEGF expression and angiogenesis in cultured muscle cells and skeletal muscle in vivo. PGC-1alpha-/- mice show a striking failure to reconstitute blood flow in a normal manner to the limb after an ischaemic insult, whereas transgenic expression of PGC-1alpha in skeletal muscle is protective. Surprisingly, the induction of VEGF by PGC-1alpha does not involve the canonical hypoxia response pathway and hypoxia inducible factor (HIF). Instead, PGC-1alpha coactivates the orphan nuclear receptor ERR-alpha (oestrogen-related receptor-alpha) on conserved binding sites found in the promoter and in a cluster within the first intron of the VEGF gene. Thus, PGC-1alpha and ERR-alpha, major regulators of mitochondrial function in response to exercise and other stimuli, also control a novel angiogenic pathway that delivers needed oxygen and substrates. PGC-1alpha may provide a novel therapeutic target for treating ischaemic diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arany, Zoltan -- Foo, Shi-Yin -- Ma, Yanhong -- Ruas, Jorge L -- Bommi-Reddy, Archana -- Girnun, Geoffrey -- Cooper, Marcus -- Laznik, Dina -- Chinsomboon, Jessica -- Rangwala, Shamina M -- Baek, Kwan Hyuck -- Rosenzweig, Anthony -- Spiegelman, Bruce M -- P30 DK040561/DK/NIDDK NIH HHS/ -- P30 DK040561-12/DK/NIDDK NIH HHS/ -- R01 DK054477/DK/NIDDK NIH HHS/ -- England -- Nature. 2008 Feb 21;451(7181):1008-12. doi: 10.1038/nature06613.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Dana-Farber Cancer Institute and Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA. zarany1@partners.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18288196" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Hypoxia ; Cells, Cultured ; Gene Expression Regulation ; Hypoxia-Inducible Factor 1/metabolism ; Ischemia/*metabolism ; Mice ; Mice, Transgenic ; Muscle, Skeletal/metabolism ; *Neovascularization, Physiologic ; Oxygen/metabolism ; Receptors, Estrogen/metabolism ; Trans-Activators/deficiency/genetics/*metabolism ; Transcription Factors ; Transgenes/genetics ; Vascular Endothelial Growth Factor A/*metabolism
    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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  • 4
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    Resolvin D2 is a potent regulator of leukocytes and controls microbial sepsis (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-10-30
    Description: A growing body of evidence indicates that resolution of acute inflammation is an active process. Resolvins are a new family of lipid mediators enzymatically generated within resolution networks that possess unique and specific functions to orchestrate catabasis, the phase in which disease declines. Resolvin D2 (RvD2) was originally identified in resolving exudates, yet its individual contribution in resolution remained to be elucidated. Here, we establish RvD2's potent stereoselective actions in reducing excessive neutrophil trafficking to inflammatory loci. RvD2 decreased leukocyte-endothelial interactions in vivo by endothelial-dependent nitric oxide production, and by direct modulation of leukocyte adhesion receptor expression. In mice with microbial sepsis initiated by caecal ligation and puncture, RvD2 sharply decreased both local and systemic bacterial burden, excessive cytokine production and neutrophil recruitment, while increasing peritoneal mononuclear cells and macrophage phagocytosis. These multi-level pro-resolving actions of RvD2 translate to increased survival from sepsis induced by caecal ligation and puncture and surgery. Together, these results identify RvD2 as a potent endogenous regulator of excessive inflammatory responses that acts via multiple cellular targets to stimulate resolution and preserve immune vigilance.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2779525/" 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/PMC2779525/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spite, Matthew -- Norling, Lucy V -- Summers, Lisa -- Yang, Rong -- Cooper, Dianne -- Petasis, Nicos A -- Flower, Roderick J -- Perretti, Mauro -- Serhan, Charles N -- 085903/Z/08/Wellcome Trust/United Kingdom -- 086867/Z/08/Z/Wellcome Trust/United Kingdom -- 18103/Arthritis Research UK/United Kingdom -- 18445/Arthritis Research UK/United Kingdom -- F32 HL087526/HL/NHLBI NIH HHS/ -- F32 HL087526-02/HL/NHLBI NIH HHS/ -- GM-38765/GM/NIGMS NIH HHS/ -- HL087526/HL/NHLBI NIH HHS/ -- P50 DE016191/DE/NIDCR NIH HHS/ -- P50 DE016191-05/DE/NIDCR NIH HHS/ -- P50-DE016191/DE/NIDCR NIH HHS/ -- R37 GM038765/GM/NIGMS NIH HHS/ -- R37 GM038765-23/GM/NIGMS NIH HHS/ -- England -- Nature. 2009 Oct 29;461(7268):1287-91. doi: 10.1038/nature08541.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19865173" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Docosahexaenoic Acids/chemical synthesis/chemistry/*metabolism ; Endothelial Cells/metabolism ; Escherichia coli/growth & development/isolation & purification ; Humans ; Inflammation/immunology/metabolism/microbiology ; Leukocytes/*immunology/*metabolism ; Macrophages/immunology/microbiology ; Male ; Mice ; Mice, Inbred C57BL ; Nitric Oxide/metabolism ; Peritoneal Cavity/cytology/microbiology ; Peritonitis/immunology/metabolism/microbiology ; Phagocytosis ; Reactive Oxygen Species/metabolism ; Sepsis/*immunology/metabolism/*microbiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 5
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    Structure and function of the 5'--〉3' exoribonuclease Rat1 and its activating partner Rai1 (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-02-06
    Description: The 5'--〉3' exoribonucleases (XRNs) comprise a large family of conserved enzymes in eukaryotes with crucial functions in RNA metabolism and RNA interference. XRN2, or Rat1 in yeast, functions primarily in the nucleus and also has an important role in transcription termination by RNA polymerase II (refs 7-14). Rat1 exoribonuclease activity is stimulated by the protein Rai1 (refs 15, 16). Here we report the crystal structure at 2.2 A resolution of Schizosaccharomyces pombe Rat1 in complex with Rai1, as well as the structures of Rai1 and its murine homologue Dom3Z alone at 2.0 A resolution. The structures reveal the molecular mechanism for the activation of Rat1 by Rai1 and for the exclusive exoribonuclease activity of Rat1. Biochemical studies confirm these observations, and show that Rai1 allows Rat1 to degrade RNAs with stable secondary structure more effectively. There are large differences in the active site landscape of Rat1 compared to related and PIN (PilT N terminus) domain-containing nucleases. Unexpectedly, we identified a large pocket in Rai1 and Dom3Z that contains highly conserved residues, including three acidic side chains that coordinate a divalent cation. Mutagenesis and biochemical studies demonstrate that Rai1 possesses pyrophosphohydrolase activity towards 5' triphosphorylated RNA. Such an activity is important for messenger RNA degradation in bacteria, but this is, to our knowledge, the first demonstration of this activity in eukaryotes and suggests that Rai1/Dom3Z may have additional important functions in RNA metabolism.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2739979/" 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/PMC2739979/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xiang, Song -- Cooper-Morgan, Amalene -- Jiao, Xinfu -- Kiledjian, Megerditch -- Manley, James L -- Tong, Liang -- GM077175/GM/NIGMS NIH HHS/ -- GM28983/GM/NIGMS NIH HHS/ -- GM67005/GM/NIGMS NIH HHS/ -- P30 EB009998/EB/NIBIB NIH HHS/ -- R01 GM067005/GM/NIGMS NIH HHS/ -- R01 GM067005-01A2/GM/NIGMS NIH HHS/ -- R01 GM077175/GM/NIGMS NIH HHS/ -- R01 GM077175-02/GM/NIGMS NIH HHS/ -- England -- Nature. 2009 Apr 9;458(7239):784-8. doi: 10.1038/nature07731. Epub 2009 Feb 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Columbia University, New York, New York 10027, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19194460" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Exoribonucleases/*chemistry/genetics/*metabolism ; Mice ; *Models, Molecular ; Mutation ; *Nuclear Proteins/chemistry/metabolism ; Protein Binding ; Protein Structure, Tertiary ; Recombinant Proteins/chemistry/metabolism ; *Schizosaccharomyces/chemistry/enzymology/genetics ; Schizosaccharomyces pombe Proteins/*chemistry/genetics/*metabolism
    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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    Specific expression of nuclear proto-oncogenes before entry into meiotic prophase of spermatogenesis (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-08-18
    Description: The expression of proto-oncogenes representative of several functional categories has been investigated during development of mouse male germ cells. The c-raf proto-oncogene and three members of the c-ras gene family were expressed in mitotically active stem cells, throughout the prophase of meiosis and to varying extents in post-meiotic cell types. In contrast, the nuclear proto-oncogenes c-fos, c-jun, and c-myc were specifically expressed at high levels in type B spermatogonia. High levels of c-myc and c-jun RNAs were also detected in spermatocytes early in the prophase of meiosis. The type B spermatogonia represent the last mitotic cell division before entry into meiotic prophase; therefore, these nuclear proto-oncogenes may be involved in altering programs of gene expression at this developmental transition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wolfes, H -- Kogawa, K -- Millette, C F -- Cooper, G M -- CA 21082/CA/NCI NIH HHS/ -- CA 28946/CA/NCI NIH HHS/ -- HD 15269/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1989 Aug 18;245(4919):740-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Dana-Farber Cancer Institute, Boston, MA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2475907" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Nucleus/*metabolism ; DNA-Binding Proteins/genetics ; *Gene Expression Regulation ; Male ; *Meiosis ; Mice ; Nucleic Acid Hybridization ; Proto-Oncogene Proteins/genetics ; Proto-Oncogene Proteins c-fos ; Proto-Oncogene Proteins c-jun ; Proto-Oncogene Proteins c-myc ; Proto-Oncogene Proteins c-raf ; Proto-Oncogene Proteins p21(ras) ; *Proto-Oncogenes ; RNA/analysis ; Spermatids/metabolism ; Spermatocytes/metabolism ; *Spermatogenesis ; Spermatogonia/metabolism ; Spermatozoa/analysis/metabolism/*ultrastructure ; Transcription Factors/genetics ; Transcription, Genetic
    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
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    Losartan, an AT1 antagonist, prevents aortic aneurysm in a mouse model of Marfan syndrome (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-04-08
    Description: Aortic aneurysm and dissection are manifestations of Marfan syndrome (MFS), a disorder caused by mutations in the gene that encodes fibrillin-1. Selected manifestations of MFS reflect excessive signaling by the transforming growth factor-beta (TGF-beta) family of cytokines. We show that aortic aneurysm in a mouse model of MFS is associated with increased TGF-beta signaling and can be prevented by TGF-beta antagonists such as TGF-beta-neutralizing antibody or the angiotensin II type 1 receptor (AT1) blocker, losartan. AT1 antagonism also partially reversed noncardiovascular manifestations of MFS, including impaired alveolar septation. These data suggest that losartan, a drug already in clinical use for hypertension, merits investigation as a therapeutic strategy for patients with MFS and has the potential to prevent the major life-threatening manifestation of this disorder.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1482474/" 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/PMC1482474/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Habashi, Jennifer P -- Judge, Daniel P -- Holm, Tammy M -- Cohn, Ronald D -- Loeys, Bart L -- Cooper, Timothy K -- Myers, Loretha -- Klein, Erin C -- Liu, Guosheng -- Calvi, Carla -- Podowski, Megan -- Neptune, Enid R -- Halushka, Marc K -- Bedja, Djahida -- Gabrielson, Kathleen -- Rifkin, Daniel B -- Carta, Luca -- Ramirez, Francesco -- Huso, David L -- Dietz, Harry C -- K08 HL067056/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2006 Apr 7;312(5770):117-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16601194" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic beta-Antagonists/administration & dosage/therapeutic use ; Angiotensin II Type 1 Receptor Blockers/administration & dosage/*therapeutic use ; Animals ; Antibodies/immunology ; Aorta/pathology ; Aortic Aneurysm/etiology/*prevention & control ; *Disease Models, Animal ; Elastic Tissue/pathology ; Female ; Losartan/administration & dosage/*therapeutic use ; Lung/pathology ; Lung Diseases/drug therapy/pathology ; Marfan Syndrome/complications/*drug therapy/metabolism/pathology ; Mice ; Microfilament Proteins/genetics ; Mutation ; Neutralization Tests ; Pregnancy ; Pregnancy Complications/drug therapy ; Propranolol/administration & dosage/therapeutic use ; Pulmonary Alveoli/pathology ; Receptor, Angiotensin, Type 1/metabolism ; Signal Transduction ; Transforming Growth Factor beta/antagonists & inhibitors/immunology/*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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  • 8
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    Molecular biology. Neutralizing toxic RNA (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-07-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cooper, Thomas A -- R01 AR045653/AR/NIAMS NIH HHS/ -- R01 AR060733/AR/NIAMS NIH HHS/ -- R01 GM076493/GM/NIGMS NIH HHS/ -- R01 HL045565/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2009 Jul 17;325(5938):272-3. doi: 10.1126/science.1177452.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Baylor College of Medicine, Houston, TX 77030, USA. tcooper@bcm.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19608901" target="_blank"〉PubMed〈/a〉
    Keywords: 3' Untranslated Regions ; Alternative Splicing ; Animals ; Base Pairing ; CELF1 Protein ; Cell Nucleus/metabolism ; Chloride Channels/genetics/metabolism ; DNA-Binding Proteins/metabolism ; Humans ; Mice ; Myotonic Dystrophy/*drug therapy/*genetics/therapy ; Myotonin-Protein Kinase ; Nucleic Acid Conformation ; Oligodeoxyribonucleotides, Antisense/pharmacology/*therapeutic use ; Protein-Serine-Threonine Kinases/genetics ; RNA, Untranslated/chemistry/*genetics/metabolism ; RNA-Binding Proteins/metabolism ; *Trinucleotide Repeat Expansion
    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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    DARPP-32: regulator of the efficacy of dopaminergic neurotransmission (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-08-07
    Description: Dopaminergic neurons exert a major modulatory effect on the forebrain. Dopamine and adenosine 3',5'-monophosphate-regulated phosphoprotein (32 kilodaltons) (DARPP-32), which is enriched in all neurons that receive a dopaminergic input, is converted in response to dopamine into a potent protein phosphatase inhibitor. Mice generated to contain a targeted disruption of the DARPP-32 gene showed profound deficits in their molecular, electrophysiological, and behavioral responses to dopamine, drugs of abuse, and antipsychotic medication. The results show that DARPP-32 plays a central role in regulating the efficacy of dopaminergic neurotransmission.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fienberg, A A -- Hiroi, N -- Mermelstein, P G -- Song, W -- Snyder, G L -- Nishi, A -- Cheramy, A -- O'Callaghan, J P -- Miller, D B -- Cole, D G -- Corbett, R -- Haile, C N -- Cooper, D C -- Onn, S P -- Grace, A A -- Ouimet, C C -- White, F J -- Hyman, S E -- Surmeier, D J -- Girault, J -- Nestler, E J -- Greengard, P -- DA 08227/DA/NIDA NIH HHS/ -- DA10044/DA/NIDA NIH HHS/ -- F31 DA005794/DA/NIDA NIH HHS/ -- MH40899/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1998 Aug 7;281(5378):838-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, NY 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9694658" target="_blank"〉PubMed〈/a〉
    Keywords: Amphetamines/pharmacology ; Animals ; Behavior, Animal/drug effects ; Calcium/metabolism ; Cocaine/pharmacology ; Corpus Striatum/metabolism ; Cyclic AMP-Dependent Protein Kinases/metabolism ; Dopamine/pharmacology/*physiology ; Dopamine Agents/pharmacology ; Dopamine and cAMP-Regulated Phosphoprotein 32 ; Female ; Gene Expression Regulation ; Gene Targeting ; Genes, fos ; Glutamic Acid/pharmacology ; Male ; Mice ; Mice, Inbred C57BL ; Nerve Tissue Proteins/genetics/*metabolism ; Neurons/*metabolism ; Phosphoprotein Phosphatases/metabolism ; *Phosphoproteins ; Phosphorylation ; Raclopride ; Receptors, Dopamine D1/metabolism ; Receptors, N-Methyl-D-Aspartate/metabolism ; Salicylamides/pharmacology ; Sodium-Potassium-Exchanging ATPase/metabolism ; *Synaptic Transmission ; gamma-Aminobutyric Acid/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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  • 10
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    Telomere dysfunction induces metabolic and mitochondrial compromise (2011)
    Nature Publishing Group (NPG)
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    Publication Date: 2011-02-11
    Description: Telomere dysfunction activates p53-mediated cellular growth arrest, senescence and apoptosis to drive progressive atrophy and functional decline in high-turnover tissues. The broader adverse impact of telomere dysfunction across many tissues including more quiescent systems prompted transcriptomic network analyses to identify common mechanisms operative in haematopoietic stem cells, heart and liver. These unbiased studies revealed profound repression of peroxisome proliferator-activated receptor gamma, coactivator 1 alpha and beta (PGC-1alpha and PGC-1beta, also known as Ppargc1a and Ppargc1b, respectively) and the downstream network in mice null for either telomerase reverse transcriptase (Tert) or telomerase RNA component (Terc) genes. Consistent with PGCs as master regulators of mitochondrial physiology and metabolism, telomere dysfunction is associated with impaired mitochondrial biogenesis and function, decreased gluconeogenesis, cardiomyopathy, and increased reactive oxygen species. In the setting of telomere dysfunction, enforced Tert or PGC-1alpha expression or germline deletion of p53 (also known as Trp53) substantially restores PGC network expression, mitochondrial respiration, cardiac function and gluconeogenesis. We demonstrate that telomere dysfunction activates p53 which in turn binds and represses PGC-1alpha and PGC-1beta promoters, thereby forging a direct link between telomere and mitochondrial biology. We propose that this telomere-p53-PGC axis contributes to organ and metabolic failure and to diminishing organismal fitness in the setting of telomere dysfunction.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3741661/" 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/PMC3741661/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sahin, Ergun -- Colla, Simona -- Liesa, Marc -- Moslehi, Javid -- Muller, Florian L -- Guo, Mira -- Cooper, Marcus -- Kotton, Darrell -- Fabian, Attila J -- Walkey, Carl -- Maser, Richard S -- Tonon, Giovanni -- Foerster, Friedrich -- Xiong, Robert -- Wang, Y Alan -- Shukla, Sachet A -- Jaskelioff, Mariela -- Martin, Eric S -- Heffernan, Timothy P -- Protopopov, Alexei -- Ivanova, Elena -- Mahoney, John E -- Kost-Alimova, Maria -- Perry, Samuel R -- Bronson, Roderick -- Liao, Ronglih -- Mulligan, Richard -- Shirihai, Orian S -- Chin, Lynda -- DePinho, Ronald A -- P30 DK046200/DK/NIDDK NIH HHS/ -- P30DK079638/DK/NIDDK NIH HHS/ -- R01 CA084628/CA/NCI NIH HHS/ -- R01 DK035914/DK/NIDDK NIH HHS/ -- R01 DK056690/DK/NIDDK NIH HHS/ -- R01 DK063356/DK/NIDDK NIH HHS/ -- R01 DK089185/DK/NIDDK NIH HHS/ -- U24 DK-59635/DK/NIDDK NIH HHS/ -- England -- Nature. 2011 Feb 17;470(7334):359-65. doi: 10.1038/nature09787. Epub 2011 Feb 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Belfer Institute for Applied Cancer Science, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21307849" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/biosynthesis ; Aging/metabolism/pathology ; Animals ; Cardiomyopathies/chemically induced/metabolism/pathology/physiopathology ; Cell Proliferation ; DNA, Mitochondrial/analysis ; Doxorubicin/toxicity ; Gluconeogenesis ; Hematopoietic Stem Cells/metabolism/pathology ; Liver/cytology/metabolism ; Mice ; Mitochondria/*metabolism/*pathology ; Myocardium/cytology/metabolism ; RNA/genetics ; Reactive Oxygen Species/metabolism ; Telomerase/deficiency/genetics ; Telomere/enzymology/genetics/*metabolism/*pathology ; Transcription Factors/antagonists & inhibitors/metabolism ; Tumor Suppressor Protein p53/deficiency/genetics/metabolism
    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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