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  • Articles  (110)
  • Mice  (110)
  • Biochemistry and Biotechnology
  • 2010-2014  (110)
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  • Articles  (110)
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  • 1
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    Rapamycin-induced insulin resistance is mediated by mTORC2 loss and uncoupled from longevity (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-03-31
    Description: Rapamycin, an inhibitor of mechanistic target of rapamycin complex 1 (mTORC1), extends the life spans of yeast, flies, and mice. Calorie restriction, which increases life span and insulin sensitivity, is proposed to function by inhibition of mTORC1, yet paradoxically, chronic administration of rapamycin substantially impairs glucose tolerance and insulin action. We demonstrate that rapamycin disrupted a second mTOR complex, mTORC2, in vivo and that mTORC2 was required for the insulin-mediated suppression of hepatic gluconeogenesis. Further, decreased mTORC1 signaling was sufficient to extend life span independently from changes in glucose homeostasis, as female mice heterozygous for both mTOR and mLST8 exhibited decreased mTORC1 activity and extended life span but had normal glucose tolerance and insulin sensitivity. Thus, mTORC2 disruption is an important mediator of the effects of rapamycin in vivo.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3324089/" 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/PMC3324089/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lamming, Dudley W -- Ye, Lan -- Katajisto, Pekka -- Goncalves, Marcus D -- Saitoh, Maki -- Stevens, Deanna M -- Davis, James G -- Salmon, Adam B -- Richardson, Arlan -- Ahima, Rexford S -- Guertin, David A -- Sabatini, David M -- Baur, Joseph A -- 1F32AG032833-01A1/AG/NIA NIH HHS/ -- CA129105/CA/NCI NIH HHS/ -- F32 AG032833/AG/NIA NIH HHS/ -- P30DK19525/DK/NIDDK NIH HHS/ -- R01 CA129105/CA/NCI NIH HHS/ -- R01 CA129105-05/CA/NCI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2012 Mar 30;335(6076):1638-43. doi: 10.1126/science.1215135.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22461615" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue, White/metabolism ; Animals ; Carrier Proteins/genetics/metabolism ; Female ; Gluconeogenesis ; Glucose/metabolism ; Glucose Clamp Technique ; Homeostasis ; Insulin/administration & dosage/blood ; *Insulin Resistance ; Liver/metabolism ; *Longevity ; Male ; Mice ; Mice, Inbred C57BL ; Multiprotein Complexes ; Muscle, Skeletal/metabolism ; Phosphorylation ; Proteins/antagonists & inhibitors/metabolism ; Proto-Oncogene Proteins c-akt/metabolism ; Signal Transduction ; Sirolimus/*pharmacology ; TOR Serine-Threonine Kinases/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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    Mitochondrial Atpif1 regulates haem synthesis in developing erythroblasts (2012)
    Nature Publishing Group (NPG)
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    Publication Date: 2012-11-09
    Description: Defects in the availability of haem substrates or the catalytic activity of the terminal enzyme in haem biosynthesis, ferrochelatase (Fech), impair haem synthesis and thus cause human congenital anaemias. The interdependent functions of regulators of mitochondrial homeostasis and enzymes responsible for haem synthesis are largely unknown. To investigate this we used zebrafish genetic screens and cloned mitochondrial ATPase inhibitory factor 1 (atpif1) from a zebrafish mutant with profound anaemia, pinotage (pnt (tq209)). Here we describe a direct mechanism establishing that Atpif1 regulates the catalytic efficiency of vertebrate Fech to synthesize haem. The loss of Atpif1 impairs haemoglobin synthesis in zebrafish, mouse and human haematopoietic models as a consequence of diminished Fech activity and elevated mitochondrial pH. To understand the relationship between mitochondrial pH, redox potential, [2Fe-2S] clusters and Fech activity, we used genetic complementation studies of Fech constructs with or without [2Fe-2S] clusters in pnt, as well as pharmacological agents modulating mitochondrial pH and redox potential. The presence of [2Fe-2S] cluster renders vertebrate Fech vulnerable to perturbations in Atpif1-regulated mitochondrial pH and redox potential. Therefore, Atpif1 deficiency reduces the efficiency of vertebrate Fech to synthesize haem, resulting in anaemia. The identification of mitochondrial Atpif1 as a regulator of haem synthesis advances our understanding of the mechanisms regulating mitochondrial haem homeostasis and red blood cell development. An ATPIF1 deficiency may contribute to important human diseases, such as congenital sideroblastic anaemias and mitochondriopathies.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3504625/" 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/PMC3504625/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shah, Dhvanit I -- Takahashi-Makise, Naoko -- Cooney, Jeffrey D -- Li, Liangtao -- Schultz, Iman J -- Pierce, Eric L -- Narla, Anupama -- Seguin, Alexandra -- Hattangadi, Shilpa M -- Medlock, Amy E -- Langer, Nathaniel B -- Dailey, Tamara A -- Hurst, Slater N -- Faccenda, Danilo -- Wiwczar, Jessica M -- Heggers, Spencer K -- Vogin, Guillaume -- Chen, Wen -- Chen, Caiyong -- Campagna, Dean R -- Brugnara, Carlo -- Zhou, Yi -- Ebert, Benjamin L -- Danial, Nika N -- Fleming, Mark D -- Ward, Diane M -- Campanella, Michelangelo -- Dailey, Harry A -- Kaplan, Jerry -- Paw, Barry H -- K01 DK085217/DK/NIDDK NIH HHS/ -- P01 HL032262/HL/NHLBI NIH HHS/ -- P30 DK072437/DK/NIDDK NIH HHS/ -- R01 DK052380/DK/NIDDK NIH HHS/ -- R01 DK070838/DK/NIDDK NIH HHS/ -- R01 DK096051/DK/NIDDK NIH HHS/ -- R01 HL082945/HL/NHLBI NIH HHS/ -- T32 GM007223/GM/NIGMS NIH HHS/ -- England -- Nature. 2012 Nov 22;491(7425):608-12. doi: 10.1038/nature11536. Epub 2012 Nov 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Division of Hematology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23135403" target="_blank"〉PubMed〈/a〉
    Keywords: Anemia, Sideroblastic/genetics/metabolism/pathology ; Animals ; Disease Models, Animal ; Erythroblasts/cytology/*metabolism ; *Erythropoiesis ; Ferrochelatase/metabolism ; Genetic Complementation Test ; Heme/*biosynthesis ; Humans ; Hydrogen-Ion Concentration ; Mice ; Mitochondria/*metabolism/pathology ; Mitochondrial Proteins/deficiency/genetics/*metabolism ; Oxidation-Reduction ; Proteins/genetics/*metabolism ; Zebrafish/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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  • 3
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    Concurrent activation of striatal direct and indirect pathways during action initiation (2013)
    Nature Publishing Group (NPG)
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    Publication Date: 2013-01-29
    Description: The basal ganglia are subcortical nuclei that control voluntary actions, and they are affected by a number of debilitating neurological disorders. The prevailing model of basal ganglia function proposes that two orthogonal projection circuits originating from distinct populations of spiny projection neurons (SPNs) in the striatum--the so-called direct and indirect pathways--have opposing effects on movement: activity of direct-pathway SPNs is thought to facilitate movement, whereas activity of indirect-pathway SPNs is presumed to inhibit movement. This model has been difficult to test owing to the lack of methods to selectively measure the activity of direct- and indirect-pathway SPNs in freely moving animals. Here we develop a novel in vivo method to specifically measure direct- and indirect-pathway SPN activity, using Cre-dependent viral expression of the genetically encoded calcium indicator (GECI) GCaMP3 in the dorsal striatum of D1-Cre (direct-pathway-specific) and A2A-Cre (indirect-pathway-specific) mice. Using fibre optics and time-correlated single-photon counting (TCSPC) in mice performing an operant task, we observed transient increases in neural activity in both direct- and indirect-pathway SPNs when animals initiated actions, but not when they were inactive. Concurrent activation of SPNs from both pathways in one hemisphere preceded the initiation of contraversive movements and predicted the occurrence of specific movements within 500 ms. These observations challenge the classical view of basal ganglia function and may have implications for understanding the origin of motor symptoms in basal ganglia disorders.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4039389/" 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/PMC4039389/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cui, Guohong -- Jun, Sang Beom -- Jin, Xin -- Pham, Michael D -- Vogel, Steven S -- Lovinger, David M -- Costa, Rui M -- 243393/European Research Council/International -- ZIA AA000407-12/Intramural NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Feb 14;494(7436):238-42. doi: 10.1038/nature11846. Epub 2013 Jan 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section on In Vivo Neural Function, Laboratory for Integrative Neuroscience, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland 20892-9412, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23354054" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium Signaling ; Female ; Fiber Optic Technology/methods ; Fluorescence ; Integrases/genetics/metabolism ; Luminescent Measurements/methods ; Male ; Mice ; Models, Neurological ; Movement/*physiology ; Neostriatum/*cytology/*physiology ; Neural Pathways/*physiology ; Parkinson Disease ; Photons
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 4
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    Pancreatic cancer genomes reveal aberrations in axon guidance pathway genes (2012)
    Nature Publishing Group (NPG)
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    Publication Date: 2012-10-30
    Description: Pancreatic cancer is a highly lethal malignancy with few effective therapies. We performed exome sequencing and copy number analysis to define genomic aberrations in a prospectively accrued clinical cohort (n = 142) of early (stage I and II) sporadic pancreatic ductal adenocarcinoma. Detailed analysis of 99 informative tumours identified substantial heterogeneity with 2,016 non-silent mutations and 1,628 copy-number variations. We define 16 significantly mutated genes, reaffirming known mutations (KRAS, TP53, CDKN2A, SMAD4, MLL3, TGFBR2, ARID1A and SF3B1), and uncover novel mutated genes including additional genes involved in chromatin modification (EPC1 and ARID2), DNA damage repair (ATM) and other mechanisms (ZIM2, MAP2K4, NALCN, SLC16A4 and MAGEA6). Integrative analysis with in vitro functional data and animal models provided supportive evidence for potential roles for these genetic aberrations in carcinogenesis. Pathway-based analysis of recurrently mutated genes recapitulated clustering in core signalling pathways in pancreatic ductal adenocarcinoma, and identified new mutated genes in each pathway. We also identified frequent and diverse somatic aberrations in genes described traditionally as embryonic regulators of axon guidance, particularly SLIT/ROBO signalling, which was also evident in murine Sleeping Beauty transposon-mediated somatic mutagenesis models of pancreatic cancer, providing further supportive evidence for the potential involvement of axon guidance genes in pancreatic carcinogenesis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3530898/" 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/PMC3530898/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Biankin, Andrew V -- Waddell, Nicola -- Kassahn, Karin S -- Gingras, Marie-Claude -- Muthuswamy, Lakshmi B -- Johns, Amber L -- Miller, David K -- Wilson, Peter J -- Patch, Ann-Marie -- Wu, Jianmin -- Chang, David K -- Cowley, Mark J -- Gardiner, Brooke B -- Song, Sarah -- Harliwong, Ivon -- Idrisoglu, Senel -- Nourse, Craig -- Nourbakhsh, Ehsan -- Manning, Suzanne -- Wani, Shivangi -- Gongora, Milena -- Pajic, Marina -- Scarlett, Christopher J -- Gill, Anthony J -- Pinho, Andreia V -- Rooman, Ilse -- Anderson, Matthew -- Holmes, Oliver -- Leonard, Conrad -- Taylor, Darrin -- Wood, Scott -- Xu, Qinying -- Nones, Katia -- Fink, J Lynn -- Christ, Angelika -- Bruxner, Tim -- Cloonan, Nicole -- Kolle, Gabriel -- Newell, Felicity -- Pinese, Mark -- Mead, R Scott -- Humphris, Jeremy L -- Kaplan, Warren -- Jones, Marc D -- Colvin, Emily K -- Nagrial, Adnan M -- Humphrey, Emily S -- Chou, Angela -- Chin, Venessa T -- Chantrill, Lorraine A -- Mawson, Amanda -- Samra, Jaswinder S -- Kench, James G -- Lovell, Jessica A -- Daly, Roger J -- Merrett, Neil D -- Toon, Christopher -- Epari, Krishna -- Nguyen, Nam Q -- Barbour, Andrew -- Zeps, Nikolajs -- Australian Pancreatic Cancer Genome Initiative -- Kakkar, Nipun -- Zhao, Fengmei -- Wu, Yuan Qing -- Wang, Min -- Muzny, Donna M -- Fisher, William E -- Brunicardi, F Charles -- Hodges, Sally E -- Reid, Jeffrey G -- Drummond, Jennifer -- Chang, Kyle -- Han, Yi -- Lewis, Lora R -- Dinh, Huyen -- Buhay, Christian J -- Beck, Timothy -- Timms, Lee -- Sam, Michelle -- Begley, Kimberly -- Brown, Andrew -- Pai, Deepa -- Panchal, Ami -- Buchner, Nicholas -- De Borja, Richard -- Denroche, Robert E -- Yung, Christina K -- Serra, Stefano -- Onetto, Nicole -- Mukhopadhyay, Debabrata -- Tsao, Ming-Sound -- Shaw, Patricia A -- Petersen, Gloria M -- Gallinger, Steven -- Hruban, Ralph H -- Maitra, Anirban -- Iacobuzio-Donahue, Christine A -- Schulick, Richard D -- Wolfgang, Christopher L -- Morgan, Richard A -- Lawlor, Rita T -- Capelli, Paola -- Corbo, Vincenzo -- Scardoni, Maria -- Tortora, Giampaolo -- Tempero, Margaret A -- Mann, Karen M -- Jenkins, Nancy A -- Perez-Mancera, Pedro A -- Adams, David J -- Largaespada, David A -- Wessels, Lodewyk F A -- Rust, Alistair G -- Stein, Lincoln D -- Tuveson, David A -- Copeland, Neal G -- Musgrove, Elizabeth A -- Scarpa, Aldo -- Eshleman, James R -- Hudson, Thomas J -- Sutherland, Robert L -- Wheeler, David A -- Pearson, John V -- McPherson, John D -- Gibbs, Richard A -- Grimmond, Sean M -- 13031/Cancer Research UK/United Kingdom -- 2P50CA101955/CA/NCI NIH HHS/ -- P01CA134292/CA/NCI NIH HHS/ -- P50 CA101955/CA/NCI NIH HHS/ -- P50 CA102701/CA/NCI NIH HHS/ -- P50CA062924/CA/NCI NIH HHS/ -- R01 CA097075/CA/NCI NIH HHS/ -- R01 CA97075/CA/NCI NIH HHS/ -- U54 HG003273/HG/NHGRI NIH HHS/ -- Cancer Research UK/United Kingdom -- Wellcome Trust/United Kingdom -- England -- Nature. 2012 Nov 15;491(7424):399-405. doi: 10.1038/nature11547. Epub 2012 Oct 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Kinghorn Cancer Centre, 370 Victoria Street, Darlinghurst, Sydney, New South Wales 2010, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23103869" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/*metabolism ; Carcinoma, Pancreatic Ductal/*genetics/*pathology ; Gene Dosage ; Gene Expression Regulation, Neoplastic ; Genome/*genetics ; Humans ; Kaplan-Meier Estimate ; Mice ; Mutation ; Pancreatic Neoplasms/*genetics/*pathology ; Proteins/genetics ; Signal Transduction
    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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    A murine lung cancer co-clinical trial identifies genetic modifiers of therapeutic response (2012)
    Nature Publishing Group (NPG)
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    Publication Date: 2012-03-20
    Description: Targeted therapies have demonstrated efficacy against specific subsets of molecularly defined cancers. Although most patients with lung cancer are stratified according to a single oncogenic driver, cancers harbouring identical activating genetic mutations show large variations in their responses to the same targeted therapy. The biology underlying this heterogeneity is not well understood, and the impact of co-existing genetic mutations, especially the loss of tumour suppressors, has not been fully explored. Here we use genetically engineered mouse models to conduct a 'co-clinical' trial that mirrors an ongoing human clinical trial in patients with KRAS-mutant lung cancers. This trial aims to determine if the MEK inhibitor selumetinib (AZD6244) increases the efficacy of docetaxel, a standard of care chemotherapy. Our studies demonstrate that concomitant loss of either p53 (also known as Tp53) or Lkb1 (also known as Stk11), two clinically relevant tumour suppressors, markedly impaired the response of Kras-mutant cancers to docetaxel monotherapy. We observed that the addition of selumetinib provided substantial benefit for mice with lung cancer caused by Kras and Kras and p53 mutations, but mice with Kras and Lkb1 mutations had primary resistance to this combination therapy. Pharmacodynamic studies, including positron-emission tomography (PET) and computed tomography (CT), identified biological markers in mice and patients that provide a rationale for the differential efficacy of these therapies in the different genotypes. These co-clinical results identify predictive genetic biomarkers that should be validated by interrogating samples from patients enrolled on the concurrent clinical trial. These studies also highlight the rationale for synchronous co-clinical trials, not only to anticipate the results of ongoing human clinical trials, but also to generate clinically relevant hypotheses that can inform the analysis and design of human studies.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3385933/" 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/PMC3385933/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Zhao -- Cheng, Katherine -- Walton, Zandra -- Wang, Yuchuan -- Ebi, Hiromichi -- Shimamura, Takeshi -- Liu, Yan -- Tupper, Tanya -- Ouyang, Jing -- Li, Jie -- Gao, Peng -- Woo, Michele S -- Xu, Chunxiao -- Yanagita, Masahiko -- Altabef, Abigail -- Wang, Shumei -- Lee, Charles -- Nakada, Yuji -- Pena, Christopher G -- Sun, Yanping -- Franchetti, Yoko -- Yao, Catherine -- Saur, Amy -- Cameron, Michael D -- Nishino, Mizuki -- Hayes, D Neil -- Wilkerson, Matthew D -- Roberts, Patrick J -- Lee, Carrie B -- Bardeesy, Nabeel -- Butaney, Mohit -- Chirieac, Lucian R -- Costa, Daniel B -- Jackman, David -- Sharpless, Norman E -- Castrillon, Diego H -- Demetri, George D -- Janne, Pasi A -- Pandolfi, Pier Paolo -- Cantley, Lewis C -- Kung, Andrew L -- Engelman, Jeffrey A -- Wong, Kwok-Kin -- 1U01CA141576/CA/NCI NIH HHS/ -- CA122794/CA/NCI NIH HHS/ -- CA137008/CA/NCI NIH HHS/ -- CA137008-01/CA/NCI NIH HHS/ -- CA137181/CA/NCI NIH HHS/ -- CA140594/CA/NCI NIH HHS/ -- CA147940/CA/NCI NIH HHS/ -- K23 CA157631/CA/NCI NIH HHS/ -- P01 CA120964/CA/NCI NIH HHS/ -- P30 CA016086/CA/NCI NIH HHS/ -- P50 CA090578/CA/NCI NIH HHS/ -- P50 CA090578-06/CA/NCI NIH HHS/ -- P50CA090578/CA/NCI NIH HHS/ -- R01 CA122794/CA/NCI NIH HHS/ -- R01 CA122794-01/CA/NCI NIH HHS/ -- R01 CA137008/CA/NCI NIH HHS/ -- R01 CA137008-01/CA/NCI NIH HHS/ -- R01 CA137181/CA/NCI NIH HHS/ -- R01 CA137181-01A2/CA/NCI NIH HHS/ -- R01 CA140594/CA/NCI NIH HHS/ -- R01 CA140594-01/CA/NCI NIH HHS/ -- R01 CA163896/CA/NCI NIH HHS/ -- RC2 CA147940/CA/NCI NIH HHS/ -- RC2 CA147940-01/CA/NCI NIH HHS/ -- U01 CA141576/CA/NCI NIH HHS/ -- U01 CA141576-01/CA/NCI NIH HHS/ -- England -- Nature. 2012 Mar 18;483(7391):613-7. doi: 10.1038/nature10937.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22425996" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Combined Chemotherapy Protocols ; Benzimidazoles/*pharmacology/therapeutic use ; Biomarkers, Tumor/genetics/metabolism ; *Clinical Trials, Phase II as Topic ; *Disease Models, Animal ; Drug Evaluation, Preclinical ; Fluorodeoxyglucose F18 ; Genes, p53/genetics ; Humans ; Lung Neoplasms/*drug therapy/enzymology/*genetics/metabolism ; MAP Kinase Signaling System/drug effects ; Mice ; Mitogen-Activated Protein Kinase Kinases/antagonists & inhibitors ; Mutation/genetics ; Pharmacogenetics/*methods ; Positron-Emission Tomography ; Protein-Serine-Threonine Kinases/deficiency/genetics ; Proto-Oncogene Proteins/genetics/metabolism ; Proto-Oncogene Proteins p21(ras)/genetics/metabolism ; Randomized Controlled Trials as Topic ; Reproducibility of Results ; Taxoids/*therapeutic use ; Tomography, X-Ray Computed ; Treatment Outcome ; ras Proteins/genetics/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 6
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    SIRT3 regulates mitochondrial fatty-acid oxidation by reversible enzyme deacetylation (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-03-06
    Description: Sirtuins are NAD(+)-dependent protein deacetylases. They mediate adaptive responses to a variety of stresses, including calorie restriction and metabolic stress. Sirtuin 3 (SIRT3) is localized in the mitochondrial matrix, where it regulates the acetylation levels of metabolic enzymes, including acetyl coenzyme A synthetase 2 (refs 1, 2). Mice lacking both Sirt3 alleles appear phenotypically normal under basal conditions, but show marked hyperacetylation of several mitochondrial proteins. Here we report that SIRT3 expression is upregulated during fasting in liver and brown adipose tissues. During fasting, livers from mice lacking SIRT3 had higher levels of fatty-acid oxidation intermediate products and triglycerides, associated with decreased levels of fatty-acid oxidation, compared to livers from wild-type mice. Mass spectrometry of mitochondrial proteins shows that long-chain acyl coenzyme A dehydrogenase (LCAD) is hyperacetylated at lysine 42 in the absence of SIRT3. LCAD is deacetylated in wild-type mice under fasted conditions and by SIRT3 in vitro and in vivo; and hyperacetylation of LCAD reduces its enzymatic activity. Mice lacking SIRT3 exhibit hallmarks of fatty-acid oxidation disorders during fasting, including reduced ATP levels and intolerance to cold exposure. These findings identify acetylation as a novel regulatory mechanism for mitochondrial fatty-acid oxidation and demonstrate that SIRT3 modulates mitochondrial intermediary metabolism and fatty-acid use during fasting.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2841477/" 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/PMC2841477/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hirschey, Matthew D -- Shimazu, Tadahiro -- Goetzman, Eric -- Jing, Enxuan -- Schwer, Bjoern -- Lombard, David B -- Grueter, Carrie A -- Harris, Charles -- Biddinger, Sudha -- Ilkayeva, Olga R -- Stevens, Robert D -- Li, Yu -- Saha, Asish K -- Ruderman, Neil B -- Bain, James R -- Newgard, Christopher B -- Farese, Robert V Jr -- Alt, Frederick W -- Kahn, C Ronald -- Verdin, Eric -- DK019514-29/DK/NIDDK NIH HHS/ -- DK59637/DK/NIDDK NIH HHS/ -- K01 DK076573/DK/NIDDK NIH HHS/ -- K08 AG022325/AG/NIA NIH HHS/ -- K08 AG022325-01A1/AG/NIA NIH HHS/ -- P01 HL068758/HL/NHLBI NIH HHS/ -- P01 HL068758-06A1/HL/NHLBI NIH HHS/ -- P30 DK026743/DK/NIDDK NIH HHS/ -- P30 DK026743-26A1/DK/NIDDK NIH HHS/ -- R01 DK019514/DK/NIDDK NIH HHS/ -- R01 DK019514-29/DK/NIDDK NIH HHS/ -- R01 DK067509/DK/NIDDK NIH HHS/ -- R01 DK067509-04/DK/NIDDK NIH HHS/ -- U24 DK059637/DK/NIDDK NIH HHS/ -- U24 DK059637-01/DK/NIDDK NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2010 Mar 4;464(7285):121-5. doi: 10.1038/nature08778.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Gladstone Institute of Virology and Immunology, San Francisco, California 94158, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20203611" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Acyl-CoA Dehydrogenase, Long-Chain/chemistry/*metabolism ; Adenosine Triphosphate/biosynthesis/metabolism ; Adipose Tissue, Brown/enzymology/metabolism ; Animals ; Body Temperature Regulation ; Caloric Restriction ; Carnitine/analogs & derivatives/metabolism ; Cell Line ; Cold Temperature ; Fasting/metabolism ; Fatty Acids/*metabolism ; Humans ; Hypoglycemia/metabolism ; Liver/enzymology/metabolism ; Male ; Mass Spectrometry ; Mice ; Mitochondria/*enzymology/*metabolism ; Oxidation-Reduction ; Sirtuin 3/deficiency/genetics/*metabolism ; Triglycerides/metabolism ; Up-Regulation
    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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    Cross-species genomics matches driver mutations and cell compartments to model ependymoma (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-07-20
    Description: Understanding the biology that underlies histologically similar but molecularly distinct subgroups of cancer has proven difficult because their defining genetic alterations are often numerous, and the cellular origins of most cancers remain unknown. We sought to decipher this heterogeneity by integrating matched genetic alterations and candidate cells of origin to generate accurate disease models. First, we identified subgroups of human ependymoma, a form of neural tumour that arises throughout the central nervous system (CNS). Subgroup-specific alterations included amplifications and homozygous deletions of genes not yet implicated in ependymoma. To select cellular compartments most likely to give rise to subgroups of ependymoma, we matched the transcriptomes of human tumours to those of mouse neural stem cells (NSCs), isolated from different regions of the CNS at different developmental stages, with an intact or deleted Ink4a/Arf locus (that encodes Cdkn2a and b). The transcriptome of human supratentorial ependymomas with amplified EPHB2 and deleted INK4A/ARF matched only that of embryonic cerebral Ink4a/Arf(-/-) NSCs. Notably, activation of Ephb2 signalling in these, but not other, NSCs generated the first mouse model of ependymoma, which is highly penetrant and accurately models the histology and transcriptome of one subgroup of human supratentorial tumour. Further, comparative analysis of matched mouse and human tumours revealed selective deregulation in the expression and copy number of genes that control synaptogenesis, pinpointing disruption of this pathway as a critical event in the production of this ependymoma subgroup. Our data demonstrate the power of cross-species genomics to meticulously match subgroup-specific driver mutations with cellular compartments to model and interrogate cancer subgroups.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2912966/" 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/PMC2912966/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Johnson, Robert A -- Wright, Karen D -- Poppleton, Helen -- Mohankumar, Kumarasamypet M -- Finkelstein, David -- Pounds, Stanley B -- Rand, Vikki -- Leary, Sarah E S -- White, Elsie -- Eden, Christopher -- Hogg, Twala -- Northcott, Paul -- Mack, Stephen -- Neale, Geoffrey -- Wang, Yong-Dong -- Coyle, Beth -- Atkinson, Jennifer -- DeWire, Mariko -- Kranenburg, Tanya A -- Gillespie, Yancey -- Allen, Jeffrey C -- Merchant, Thomas -- Boop, Fredrick A -- Sanford, Robert A -- Gajjar, Amar -- Ellison, David W -- Taylor, Michael D -- Grundy, Richard G -- Gilbertson, Richard J -- P01 CA096832/CA/NCI NIH HHS/ -- P01 CA096832-06A18120/CA/NCI NIH HHS/ -- P01 CA096832-078120/CA/NCI NIH HHS/ -- P01CA96832/CA/NCI NIH HHS/ -- P30 CA021765/CA/NCI NIH HHS/ -- P30 CA021765-319030/CA/NCI NIH HHS/ -- P30CA021765/CA/NCI NIH HHS/ -- R01 CA129541/CA/NCI NIH HHS/ -- R01 CA129541-01/CA/NCI NIH HHS/ -- R01 CA129541-02/CA/NCI NIH HHS/ -- R01 CA129541-03/CA/NCI NIH HHS/ -- R01 CA129541-04/CA/NCI NIH HHS/ -- R01CA129541/CA/NCI NIH HHS/ -- T32 CA070089/CA/NCI NIH HHS/ -- England -- Nature. 2010 Jul 29;466(7306):632-6. doi: 10.1038/nature09173. Epub 2010 Jul 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Developmental Neurobiology, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, Tennessee 38105, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20639864" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Compartmentation ; Central Nervous System/cytology/growth & development ; Central Nervous System Neoplasms/classification/genetics/pathology ; *Disease Models, Animal ; Ependymoma/classification/*genetics/*pathology ; Gene Deletion ; Gene Expression Profiling ; Gene Expression Regulation, Neoplastic ; Genes, p16 ; *Genomics ; Humans ; Mice ; Models, Biological ; Mutation/*genetics ; Polymorphism, Single Nucleotide/genetics ; Receptor, EphB2/genetics/metabolism ; Species Specificity ; Stem Cells/cytology/metabolism ; Synapses/metabolism
    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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    The ancient drug salicylate directly activates AMP-activated protein kinase (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-04-21
    Description: Salicylate, a plant product, has been in medicinal use since ancient times. More recently, it has been replaced by synthetic derivatives such as aspirin and salsalate, both of which are rapidly broken down to salicylate in vivo. At concentrations reached in plasma after administration of salsalate or of aspirin at high doses, salicylate activates adenosine monophosphate-activated protein kinase (AMPK), a central regulator of cell growth and metabolism. Salicylate binds at the same site as the synthetic activator A-769662 to cause allosteric activation and inhibition of dephosphorylation of the activating phosphorylation site, threonine-172. In AMPK knockout mice, effects of salicylate to increase fat utilization and to lower plasma fatty acids in vivo were lost. Our results suggest that AMPK activation could explain some beneficial effects of salsalate and aspirin in humans.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3399766/" 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/PMC3399766/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hawley, Simon A -- Fullerton, Morgan D -- Ross, Fiona A -- Schertzer, Jonathan D -- Chevtzoff, Cyrille -- Walker, Katherine J -- Peggie, Mark W -- Zibrova, Darya -- Green, Kevin A -- Mustard, Kirsty J -- Kemp, Bruce E -- Sakamoto, Kei -- Steinberg, Gregory R -- Hardie, D Grahame -- 080982/Wellcome Trust/United Kingdom -- 097726/Wellcome Trust/United Kingdom -- MC_U127088492/Medical Research Council/United Kingdom -- Canadian Institutes of Health Research/Canada -- Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2012 May 18;336(6083):918-22. doi: 10.1126/science.1215327. Epub 2012 Apr 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Cell Signalling and Immunology, College of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22517326" target="_blank"〉PubMed〈/a〉
    Keywords: AMP-Activated Protein Kinases/genetics/*metabolism ; Amino Acid Substitution ; Animals ; Aspirin/pharmacology ; Binding Sites ; Carbohydrate Metabolism/drug effects ; Cell Line ; Enzyme Activation ; Enzyme Activators/pharmacology ; HEK293 Cells ; Humans ; Lipid Metabolism/drug effects ; Liver/drug effects/metabolism ; Mice ; Mice, Knockout ; Mutation ; Oxygen Consumption/drug effects ; Phosphorylation ; Pyrones/pharmacology ; Rats ; Salicylates/blood/*metabolism/*pharmacology ; Thiophenes/pharmacology
    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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    Global epigenomic reconfiguration during mammalian brain development (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-07-06
    Description: DNA methylation is implicated in mammalian brain development and plasticity underlying learning and memory. We report the genome-wide composition, patterning, cell specificity, and dynamics of DNA methylation at single-base resolution in human and mouse frontal cortex throughout their lifespan. Widespread methylome reconfiguration occurs during fetal to young adult development, coincident with synaptogenesis. During this period, highly conserved non-CG methylation (mCH) accumulates in neurons, but not glia, to become the dominant form of methylation in the human neuronal genome. Moreover, we found an mCH signature that identifies genes escaping X-chromosome inactivation. Last, whole-genome single-base resolution 5-hydroxymethylcytosine (hmC) maps revealed that hmC marks fetal brain cell genomes at putative regulatory regions that are CG-demethylated and activated in the adult brain and that CG demethylation at these hmC-poised loci depends on Tet2 activity.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3785061/" 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/PMC3785061/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lister, Ryan -- Mukamel, Eran A -- Nery, Joseph R -- Urich, Mark -- Puddifoot, Clare A -- Johnson, Nicholas D -- Lucero, Jacinta -- Huang, Yun -- Dwork, Andrew J -- Schultz, Matthew D -- Yu, Miao -- Tonti-Filippini, Julian -- Heyn, Holger -- Hu, Shijun -- Wu, Joseph C -- Rao, Anjana -- Esteller, Manel -- He, Chuan -- Haghighi, Fatemeh G -- Sejnowski, Terrence J -- Behrens, M Margarita -- Ecker, Joseph R -- AI44432/AI/NIAID NIH HHS/ -- CA151535/CA/NCI NIH HHS/ -- HD065812/HD/NICHD NIH HHS/ -- HG006827/HG/NHGRI NIH HHS/ -- K99NS080911/NS/NINDS NIH HHS/ -- MH094670/MH/NIMH NIH HHS/ -- R01 AI044432/AI/NIAID NIH HHS/ -- R01 CA151535/CA/NCI NIH HHS/ -- R01 HD065812/HD/NICHD NIH HHS/ -- R01 HG006827/HG/NHGRI NIH HHS/ -- R01 MH094670/MH/NIMH NIH HHS/ -- R01 MH094774/MH/NIMH NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2013 Aug 9;341(6146):1237905. doi: 10.1126/science.1237905. Epub 2013 Jul 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Genomic Analysis Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA. ryan.lister@uwa.edu.au〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23828890" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Methylcytosine/metabolism ; Adult ; Animals ; Base Sequence ; Conserved Sequence ; Cytosine/*analogs & derivatives/metabolism ; *DNA Methylation ; *Epigenesis, Genetic ; Epigenomics ; Frontal Lobe/*growth & development ; *Gene Expression Regulation, Developmental ; Genome-Wide Association Study ; Humans ; Longevity ; Mice ; Mice, Inbred C57BL ; X Chromosome Inactivation/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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  • 10
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    Suppression of oxidative stress by beta-hydroxybutyrate, an endogenous histone deacetylase inhibitor (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-12-12
    Description: Concentrations of acetyl-coenzyme A and nicotinamide adenine dinucleotide (NAD(+)) affect histone acetylation and thereby couple cellular metabolic status and transcriptional regulation. We report that the ketone body d-beta-hydroxybutyrate (betaOHB) is an endogenous and specific inhibitor of class I histone deacetylases (HDACs). Administration of exogenous betaOHB, or fasting or calorie restriction, two conditions associated with increased betaOHB abundance, all increased global histone acetylation in mouse tissues. Inhibition of HDAC by betaOHB was correlated with global changes in transcription, including that of the genes encoding oxidative stress resistance factors FOXO3A and MT2. Treatment of cells with betaOHB increased histone acetylation at the Foxo3a and Mt2 promoters, and both genes were activated by selective depletion of HDAC1 and HDAC2. Consistent with increased FOXO3A and MT2 activity, treatment of mice with betaOHB conferred substantial protection against oxidative stress.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3735349/" 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/PMC3735349/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shimazu, Tadahiro -- Hirschey, Matthew D -- Newman, John -- He, Wenjuan -- Shirakawa, Kotaro -- Le Moan, Natacha -- Grueter, Carrie A -- Lim, Hyungwook -- Saunders, Laura R -- Stevens, Robert D -- Newgard, Christopher B -- Farese, Robert V Jr -- de Cabo, Rafael -- Ulrich, Scott -- Akassoglou, Katerina -- Verdin, Eric -- P30 DK026743/DK/NIDDK NIH HHS/ -- P30 DK063720/DK/NIDDK NIH HHS/ -- R01 DK056084/DK/NIDDK NIH HHS/ -- T32 AG000212/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2013 Jan 11;339(6116):211-4. doi: 10.1126/science.1227166. Epub 2012 Dec 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Gladstone Institute of Virology and Immunology, San Francisco, CA 94158, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23223453" target="_blank"〉PubMed〈/a〉
    Keywords: 3-Hydroxybutyric Acid/blood/*metabolism/pharmacology ; Acetylation ; Animals ; Caloric Restriction ; Catalase/metabolism ; Fasting ; Forkhead Transcription Factors/genetics ; HEK293 Cells ; Histone Deacetylase Inhibitors/blood/*metabolism/pharmacology ; Histone Deacetylases/genetics/*metabolism ; Histones/metabolism ; Humans ; Kidney/drug effects/*metabolism ; Lipid Peroxidation ; Metallothionein/genetics/metabolism ; Mice ; Mice, Inbred C57BL ; *Oxidative Stress/genetics ; Promoter Regions, Genetic ; RNA, Small Interfering ; Superoxide Dismutase/metabolism ; Transcription, Genetic ; Transcriptional Activation
    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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