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  • Articles  (18)
  • Mice  (18)
  • Structure, structural phase transitions, mechanical properties, defects
  • Science. 212(4498): 1034-5.  (1)
  • Science. 262(5135): 907-9.  (1)
  • Science. 282(5396): 2085-8.  (1)
  • Science. 290(5499): 2155-9.  (1)
  • Science. 297(5578): 96-9. doi: 10.1126/science.1069531.  (1)
  • Science. 300(5625): 1574-7. doi: 10.1126/science.1079817.  (1)
  • Science. 304(5670): 600-2. doi: 10.1126/science.1093941.  (1)
  • Science. 319(5863): 611-3. doi: 10.1126/science.1152257.  (1)
  • Science. 320(5879): 1088-92. doi: 10.1126/science.1157121.  (1)
  • Science. 321(5897): 1841-4. doi: 10.1126/science.1161621.  (1)
  • Science. 324(5934): 1572-6. doi: 10.1126/science.1175194.  (1)
  • Science. 327(5963): 340-3. doi: 10.1126/science.1174779.  (1)
  • Science. 334(6057): 806-9. doi: 10.1126/science.1207861.  (1)
  • Science. 339(6121): 786-91. doi: 10.1126/science.1232458.  (1)
  • Science. 339(6121): 826-30. doi: 10.1126/science.1229963.  (1)
  • Science. 340(6136): 1113-7. doi: 10.1126/science.1234914.  (1)
  • Science. 341(6148): 903-6. doi: 10.1126/science.1240933.  (1)
  • Science. 347(6227): aaa2630. doi: 10.1126/science.aaa2630.  (1)
  • 25
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  • Articles  (18)
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  • 1
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    Functional requirement for class I MHC in CNS development and plasticity (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-12-16
    Description: Class I major histocompatibility complex (class I MHC) molecules, known to be important for immune responses to antigen, are expressed also by neurons that undergo activity-dependent, long-term structural and synaptic modifications. Here, we show that in mice genetically deficient for cell surface class I MHC or for a class I MHC receptor component, CD3zeta, refinement of connections between retina and central targets during development is incomplete. In the hippocampus of adult mutants, N-methyl-D-aspartate receptor-dependent long-term potentiation (LTP) is enhanced, and long-term depression (LTD) is absent. Specific class I MHC messenger RNAs are expressed by distinct mosaics of neurons, reflecting a potential for diverse neuronal functions. These results demonstrate an important role for these molecules in the activity-dependent remodeling and plasticity of connections in the developing and mature mammalian central nervous system (CNS).〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2175035/" 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/PMC2175035/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huh, G S -- Boulanger, L M -- Du, H -- Riquelme, P A -- Brotz, T M -- Shatz, C J -- 1F32EY07016/EY/NEI NIH HHS/ -- EY06912/EY/NEI NIH HHS/ -- F32 EY007016/EY/NEI NIH HHS/ -- F32 EY007016-02/EY/NEI NIH HHS/ -- F32 EY007016-03/EY/NEI NIH HHS/ -- MH48108/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2000 Dec 15;290(5499):2155-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, Harvard Medical School, 220 Longwood Avenue, Boston, MA 02115, USA. gshuh@alum.mit.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11118151" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD3/genetics/*physiology ; Brain/growth & development/*physiology ; Excitatory Postsynaptic Potentials ; Gene Expression Profiling ; Genes, MHC Class I ; Geniculate Bodies/physiology ; Hippocampus/growth & development/physiology ; Histocompatibility Antigens Class I/genetics/*physiology ; In Situ Hybridization ; Long-Term Potentiation ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Mice, Mutant Strains ; Neural Pathways ; *Neuronal Plasticity ; Neurons/*physiology ; Receptors, GABA-A/metabolism ; Receptors, N-Methyl-D-Aspartate/metabolism ; Retina/growth & development/physiology ; Retinal Ganglion Cells/physiology ; Signal Transduction ; Synapses/*physiology ; Synaptic Transmission ; Visual Pathways
    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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    An essential role of N-terminal arginylation in cardiovascular development (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-07-06
    Description: The enzymatic conjugation of arginine to the N-termini of proteins is a part of the ubiquitin-dependent N-end rule pathway of protein degradation. In mammals, three N-terminal residues-aspartate, glutamate, and cysteine-are substrates for arginylation. The mouse ATE1 gene encodes a family of Arg-tRNA-protein transferases (R-transferases) that mediate N-terminal arginylation. We constructed ATE1-lacking mouse strains and found that ATE1-/- embryos die with defects in heart development and in angiogenic remodeling of the early vascular plexus. Through biochemical analyses, we show that N-terminal cysteine, in contrast to N-terminal aspartate and glutamate, is oxidized before its arginylation by R-transferase, suggesting that the arginylation branch of the N-end rule pathway functions as an oxygen sensor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kwon, Yong Tae -- Kashina, Anna S -- Davydov, Ilia V -- Hu, Rong-Gui -- An, Jee Young -- Seo, Jai Wha -- Du, Fangyong -- Varshavsky, Alexander -- GM31530/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2002 Jul 5;297(5578):96-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biology, 147-75, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12098698" target="_blank"〉PubMed〈/a〉
    Keywords: Alkylation ; Aminoacyltransferases/*genetics/*metabolism ; Animals ; Aorta/embryology ; Arginine/*metabolism ; Aspartic Acid/metabolism ; Blood Vessels/*embryology ; Cell Line ; Cysteic Acid/metabolism ; Cysteine/metabolism ; Female ; Glutamic Acid/metabolism ; Heart/*embryology ; Heart Defects, Congenital/embryology ; Heart Septal Defects/embryology ; Hypoxia-Inducible Factor 1, alpha Subunit ; Male ; Mice ; Mice, Inbred C57BL ; Neovascularization, Physiologic ; Oxidation-Reduction ; Proteins/*metabolism ; Pulmonary Artery/embryology ; RGS Proteins/metabolism ; Recombinant Proteins/metabolism ; Sulfinic Acids/metabolism ; Transcription Factors/metabolism ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    The serine protease TMPRSS6 is required to sense iron deficiency (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-05-03
    Description: Hepcidin, a liver-derived protein that restricts enteric iron absorption, is the key regulator of body iron content. Several proteins induce expression of the hepcidin-encoding gene Hamp in response to infection or high levels of iron. However, mechanism(s) of Hamp suppression during iron depletion are poorly understood. We describe mask: a recessive, chemically induced mutant mouse phenotype, characterized by progressive loss of body (but not facial) hair and microcytic anemia. The mask phenotype results from reduced absorption of dietary iron caused by high levels of hepcidin and is due to a splicing defect in the transmembrane serine protease 6 gene Tmprss6. Overexpression of normal TMPRSS6 protein suppresses activation of the Hamp promoter, and the TMPRSS6 cytoplasmic domain mediates Hamp suppression via proximal promoter element(s). TMPRSS6 is an essential component of a pathway that detects iron deficiency and blocks Hamp transcription, permitting enhanced dietary iron absorption.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2430097/" 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/PMC2430097/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Du, Xin -- She, Ellen -- Gelbart, Terri -- Truksa, Jaroslav -- Lee, Pauline -- Xia, Yu -- Khovananth, Kevin -- Mudd, Suzanne -- Mann, Navjiwan -- Moresco, Eva Marie Y -- Beutler, Ernest -- Beutler, Bruce -- AI054523/AI/NIAID NIH HHS/ -- DK53505-09/DK/NIDDK NIH HHS/ -- R01 DK053505-09/DK/NIDDK NIH HHS/ -- U54 AI054523/AI/NIAID NIH HHS/ -- U54 AI054523-019005/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2008 May 23;320(5879):1088-92. doi: 10.1126/science.1157121. Epub 2008 May 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18451267" target="_blank"〉PubMed〈/a〉
    Keywords: Anemia, Macrocytic/genetics/metabolism ; Animals ; Antimicrobial Cationic Peptides/*genetics/metabolism ; Cell Line, Tumor ; Gene Expression Regulation ; Hepcidins ; Humans ; Iron/blood/*deficiency/metabolism ; Membrane Proteins/chemistry/genetics/*metabolism ; Mice ; Mice, Mutant Strains ; Mice, Transgenic ; Models, Biological ; Mutation ; Phenotype ; Promoter Regions, Genetic ; Protein Structure, Tertiary ; Serine Endopeptidases/chemistry/genetics/*metabolism ; Signal Transduction ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Seeding and propagation of untransformed mouse mammary cells in the lung (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-08-30
    Description: The acquisition of metastatic ability by tumor cells is considered a late event in the evolution of malignant tumors. We report that untransformed mouse mammary cells that have been engineered to express the inducible oncogenic transgenes MYC and Kras(D12), or polyoma middle T, and introduced into the systemic circulation of a mouse can bypass transformation at the primary site and develop into metastatic pulmonary lesions upon immediate or delayed oncogene induction. Therefore, previously untransformed mammary cells may establish residence in the lung once they have entered the bloodstream and may assume malignant growth upon oncogene activation. Mammary cells lacking oncogenic transgenes displayed a similar capacity for long-term residence in the lungs but did not form ectopic tumors.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2694414/" 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/PMC2694414/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Podsypanina, Katrina -- Du, Yi-Chieh Nancy -- Jechlinger, Martin -- Beverly, Levi J -- Hambardzumyan, Dolores -- Varmus, Harold -- K01 CA118731/CA/NCI NIH HHS/ -- K01 CA118731-03/CA/NCI NIH HHS/ -- P01 CA94060/CA/NCI NIH HHS/ -- P30-CA 08748/CA/NCI NIH HHS/ -- R24 CA83084/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2008 Sep 26;321(5897):1841-4. doi: 10.1126/science.1161621. Epub 2008 Aug 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Cancer Biology and Genetics, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA. podsypak@mskcc.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18755941" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/pathology/secondary ; Animals ; Antigens, Polyomavirus Transforming/genetics ; Cell Proliferation ; Cell Survival ; Cell Transformation, Neoplastic ; Epithelial Cells/*cytology ; Gene Expression Regulation, Neoplastic ; Genes, myc ; Genes, ras ; Lung Neoplasms/pathology/*secondary ; Mammary Glands, Animal/*cytology ; Mammary Neoplasms, Experimental/pathology ; Mice ; Mice, Transgenic ; *Neoplasm Metastasis ; *Neoplasm Seeding ; Neoplastic Cells, Circulating ; *Oncogenes ; Transgenes
    Print ISSN: 0036-8075
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  • 5
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    A vital role for interleukin-21 in the control of a chronic viral infection (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-05-16
    Description: Understanding the factors that regulate the induction, quality, and longevity of antiviral T cell responses is essential for devising rational strategies to prevent or combat infections. In this study, we show that interleukin-21 (IL-21), likely produced by CD4+ T cells, directly influences the generation of polyfunctional CD8+ T cells and that the number of CD4+ T cells that produce IL-21 differs markedly between acute and chronic infections. IL-21 regulates the development of CD8+ T cell exhaustion and the ability to contain chronic lymphocytic choriomeningitis virus infection. Thus, IL-21 serves as a critical helper factor that shapes the functional quality of antiviral CD8+ T cells and is required for viral control.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2736049/" 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/PMC2736049/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yi, John S -- Du, Ming -- Zajac, Allan J -- AI049360/AI/NIAID NIH HHS/ -- AI067993/AI/NIAID NIH HHS/ -- R01 AI049360/AI/NIAID NIH HHS/ -- R01 AI049360-08/AI/NIAID NIH HHS/ -- R01 AI067993/AI/NIAID NIH HHS/ -- R01 AI067993-03/AI/NIAID NIH HHS/ -- T32 AI007051/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2009 Jun 19;324(5934):1572-6. doi: 10.1126/science.1175194. Epub 2009 May 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294-2170, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19443735" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; CD4-Positive T-Lymphocytes/*immunology ; CD8-Positive T-Lymphocytes/*immunology ; Chronic Disease ; Interleukins/*immunology ; Lymphocytic Choriomeningitis/*immunology ; Lymphocytic choriomeningitis virus ; Mice ; Mice, Inbred C57BL ; Viral Load
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
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    G protein subunit Galpha13 binds to integrin alphaIIbbeta3 and mediates integrin "outside-in" signaling (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-01-16
    Description: Integrins mediate cell adhesion to the extracellular matrix and transmit signals within the cell that stimulate cell spreading, retraction, migration, and proliferation. The mechanism of integrin outside-in signaling has been unclear. We found that the heterotrimeric guanine nucleotide-binding protein (G protein) Galpha13 directly bound to the integrin beta3 cytoplasmic domain and that Galpha13-integrin interaction was promoted by ligand binding to the integrin alphaIIbbeta3 and by guanosine triphosphate (GTP) loading of Galpha13. Interference of Galpha13 expression or a myristoylated fragment of Galpha13 that inhibited interaction of alphaIIbbeta3 with Galpha13 diminished activation of protein kinase c-Src and stimulated the small guanosine triphosphatase RhoA, consequently inhibiting cell spreading and accelerating cell retraction. We conclude that integrins are noncanonical Galpha13-coupled receptors that provide a mechanism for dynamic regulation of RhoA.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2842917/" 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/PMC2842917/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gong, Haixia -- Shen, Bo -- Flevaris, Panagiotis -- Chow, Christina -- Lam, Stephen C-T -- Voyno-Yasenetskaya, Tatyana A -- Kozasa, Tohru -- Du, Xiaoping -- GM061454/GM/NIGMS NIH HHS/ -- GM074001/GM/NIGMS NIH HHS/ -- HL062350/HL/NHLBI NIH HHS/ -- HL068819/HL/NHLBI NIH HHS/ -- HL080264/HL/NHLBI NIH HHS/ -- R01 GM061454/GM/NIGMS NIH HHS/ -- R01 GM061454-09/GM/NIGMS NIH HHS/ -- R01 GM074001/GM/NIGMS NIH HHS/ -- R01 GM074001-02/GM/NIGMS NIH HHS/ -- R01 HL062350/HL/NHLBI NIH HHS/ -- R01 HL062350-09/HL/NHLBI NIH HHS/ -- R01 HL068819/HL/NHLBI NIH HHS/ -- R01 HL068819-08/HL/NHLBI NIH HHS/ -- R01 HL080264/HL/NHLBI NIH HHS/ -- R01 HL080264-04/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2010 Jan 15;327(5963):340-3. doi: 10.1126/science.1174779.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, University of Illinois at Chicago, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20075254" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; Blood Platelets/*physiology ; Clot Retraction ; Fibrinogen/metabolism ; GTP-Binding Protein alpha Subunits, G12-G13/genetics/*metabolism ; Humans ; Integrin beta3/*metabolism ; Ligands ; Mice ; Mice, Inbred C57BL ; Phosphorylation ; Platelet Adhesiveness ; Platelet Glycoprotein GPIIb-IIIa Complex/*metabolism ; Protein Binding ; Protein Structure, Tertiary ; Proto-Oncogene Proteins pp60(c-src)/metabolism ; RNA, Small Interfering ; Recombinant Fusion Proteins/metabolism ; *Signal Transduction ; rhoA GTP-Binding Protein/antagonists & inhibitors/metabolism
    Print ISSN: 0036-8075
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  • 7
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    Cyclic GMP-AMP synthase is an innate immune sensor of HIV and other retroviruses (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-08-10
    Description: Retroviruses, including HIV, can activate innate immune responses, but the host sensors for retroviruses are largely unknown. Here we show that HIV infection activates cyclic guanosine monophosphate-adenosine monophosphate (cGAMP) synthase (cGAS) to produce cGAMP, which binds to and activates the adaptor protein STING to induce type I interferons and other cytokines. Inhibitors of HIV reverse transcriptase, but not integrase, abrogated interferon-beta induction by the virus, suggesting that the reverse-transcribed HIV DNA triggers the innate immune response. Knockout or knockdown of cGAS in mouse or human cell lines blocked cytokine induction by HIV, murine leukemia virus, and simian immunodeficiency virus. These results indicate that cGAS is an innate immune sensor of HIV and other retroviruses.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3860819/" 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/PMC3860819/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gao, Daxing -- Wu, Jiaxi -- Wu, You-Tong -- Du, Fenghe -- Aroh, Chukwuemika -- Yan, Nan -- Sun, Lijun -- Chen, Zhijian J -- R01 AI093967/AI/NIAID NIH HHS/ -- R01 AI098569/AI/NIAID NIH HHS/ -- R01-AI093967/AI/NIAID NIH HHS/ -- R01-AI098569/AI/NIAID NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2013 Aug 23;341(6148):903-6. doi: 10.1126/science.1240933. Epub 2013 Aug 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23929945" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Gene Knockdown Techniques ; HEK293 Cells ; HIV/drug effects/enzymology/*immunology ; HIV Infections/enzymology/*immunology/virology ; HIV Reverse Transcriptase/antagonists & inhibitors ; Humans ; *Immunity, Innate ; Interferon-beta/biosynthesis ; Membrane Proteins/metabolism ; Mice ; Nucleotidyltransferases/genetics/*metabolism ; Retroviridae/immunology ; Retroviridae Infections/enzymology/immunology/virology ; Reverse Transcriptase Inhibitors/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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  • 8
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    Cyclic GMP-AMP synthase is a cytosolic DNA sensor that activates the type I interferon pathway (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-12-22
    Description: The presence of DNA in the cytoplasm of mammalian cells is a danger signal that triggers host immune responses such as the production of type I interferons. Cytosolic DNA induces interferons through the production of cyclic guanosine monophosphate-adenosine monophosphate (cyclic GMP-AMP, or cGAMP), which binds to and activates the adaptor protein STING. Through biochemical fractionation and quantitative mass spectrometry, we identified a cGAMP synthase (cGAS), which belongs to the nucleotidyltransferase family. Overexpression of cGAS activated the transcription factor IRF3 and induced interferon-beta in a STING-dependent manner. Knockdown of cGAS inhibited IRF3 activation and interferon-beta induction by DNA transfection or DNA virus infection. cGAS bound to DNA in the cytoplasm and catalyzed cGAMP synthesis. These results indicate that cGAS is a cytosolic DNA sensor that induces interferons by producing the second messenger cGAMP.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3863629/" 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/PMC3863629/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, Lijun -- Wu, Jiaxi -- Du, Fenghe -- Chen, Xiang -- Chen, Zhijian J -- AI-093967/AI/NIAID NIH HHS/ -- R01 AI093967/AI/NIAID NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2013 Feb 15;339(6121):786-91. doi: 10.1126/science.1232458. Epub 2012 Dec 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23258413" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Amino Acid Sequence ; Animals ; Cell Line, Tumor ; Cyclic AMP/biosynthesis ; Cyclic GMP/biosynthesis ; Cytidine Triphosphate/metabolism ; Cytosol/enzymology/*immunology ; DNA/*immunology/metabolism ; Gene Knockdown Techniques ; HEK293 Cells ; Humans ; Interferon Type I/*biosynthesis ; Interferon-beta/*biosynthesis ; Metabolic Networks and Pathways ; Mice ; Molecular Sequence Data ; Nucleotidyltransferases/genetics/isolation & purification/*metabolism
    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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  • 9
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    TRB3: a tribbles homolog that inhibits Akt/PKB activation by insulin in liver (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-06-07
    Description: Insulin resistance is a major hallmark in the development of type II diabetes, which is characterized by the failure of insulin to promote glucose uptake in muscle and to suppress glucose production in liver. The serine-threonine kinase Akt (PKB) is a principal target of insulin signaling that inhibits hepatic glucose output when glucose is available from food. Here we show that TRB3, a mammalian homolog of Drosophila tribbles, functions as a negative modulator of Akt. TRB3 expression is induced in liver under fasting conditions, and TRB3 disrupts insulin signaling by binding directly to Akt and blocking activation of the kinase. Amounts of TRB3 RNA and protein were increased in livers of db/db diabetic mice compared with those in wild-type mice. Hepatic overexpression of TRB3 in amounts comparable to those in db/db mice promoted hyperglycemia and glucose intolerance. Our results suggest that, by interfering with Akt activation, TRB3 contributes to insulin resistance in individuals with susceptibility to type II diabetes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Du, Keyong -- Herzig, Stephan -- Kulkarni, Rohit N -- Montminy, Marc -- New York, N.Y. -- Science. 2003 Jun 6;300(5625):1574-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Peptide Biology Laboratories, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037-1002, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12791994" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoviridae/genetics/physiology ; Amino Acid Substitution ; Animals ; Blood Glucose/metabolism ; Cell Cycle Proteins/genetics/*metabolism ; Cell Line ; Diabetes Mellitus/genetics/metabolism ; Enzyme Activation ; Fasting ; Genetic Vectors ; Glucose/metabolism ; Glucose Intolerance ; Glycogen Synthase Kinase 3/metabolism ; Humans ; Insulin/blood/*metabolism ; Insulin Resistance ; Insulin-Like Growth Factor I/pharmacology ; Liver/*metabolism ; Male ; Mice ; Mice, Inbred C57BL ; Phosphorylation ; Polymerase Chain Reaction ; Protein-Serine-Threonine Kinases/metabolism ; Proto-Oncogene Proteins/*metabolism ; Proto-Oncogene Proteins c-akt ; RNA Interference ; Rats ; Repressor Proteins ; Signal Transduction ; Transfection ; Transgenes ; Tumor Cells, Cultured ; Two-Hybrid System Techniques
    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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    Curcumin, a major constituent of turmeric, corrects cystic fibrosis defects (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-04-24
    Description: Cystic fibrosis is caused by mutations in the gene encoding the cystic fibrosis transmembrane conductance regulator (CFTR). The most common mutation, DeltaF508, results in the production of a misfolded CFTR protein that is retained in the endoplasmic reticulum and targeted for degradation. Curcumin is a nontoxic Ca-adenosine triphosphatase pump inhibitor that can be administered to humans safely. Oral administration of curcumin to homozygous DeltaF508 CFTR mice in doses comparable, on a weight-per-weight basis, to those well tolerated by humans corrected these animals' characteristic nasal potential difference defect. These effects were not observed in mice homozygous for a complete knockout of the CFTR gene. Curcumin also induced the functional appearance of DeltaF508 CFTR protein in the plasma membranes of transfected baby hamster kidney cells. Thus, curcumin treatment may be able to correct defects associated with the homozygous expression of DeltaF508 CFTR.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Egan, Marie E -- Pearson, Marilyn -- Weiner, Scott A -- Rajendran, Vanathy -- Rubin, Daniel -- Glockner-Pagel, Judith -- Canny, Susan -- Du, Kai -- Lukacs, Gergely L -- Caplan, Michael J -- DK17433/DK/NIDDK NIH HHS/ -- DK53428/DK/NIDDK NIH HHS/ -- GM42136/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2004 Apr 23;304(5670):600-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics, Yale University School of Medicine, 333 Cedar Street, Post Office Box 208026, New Haven, CT 06520-8026, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15105504" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/metabolism ; Calnexin/metabolism ; Cell Line ; Cell Membrane/*metabolism ; Cricetinae ; Curcumin/administration & dosage/*pharmacology/therapeutic use ; Cystic Fibrosis/*drug therapy/genetics/physiopathology ; Cystic Fibrosis Transmembrane Conductance ; Regulator/chemistry/genetics/*metabolism ; Electrolytes/pharmacology ; Endoplasmic Reticulum/*metabolism ; Gene Targeting ; Glycosylation ; Humans ; Intestinal Mucosa/drug effects/physiology ; Intestinal Obstruction/prevention & control ; Isoproterenol/pharmacology ; Membrane Potentials/drug effects ; Mice ; Mice, Knockout ; Mutation ; Nasal Mucosa/*drug effects/physiology ; Polyethylene Glycols/pharmacology ; Protein Folding ; Rectum ; Transfection
    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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