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  • Phosphorylation  (3)
  • American Association for the Advancement of Science (AAAS)  (3)
  • 2005-2009  (3)
  • 1
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    The kinase LKB1 mediates glucose homeostasis in liver and therapeutic effects of metformin (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-11-26
    Description: The Peutz-Jegher syndrome tumor-suppressor gene encodes a protein-threonine kinase, LKB1, which phosphorylates and activates AMPK [adenosine monophosphate (AMP)-activated protein kinase]. The deletion of LKB1 in the liver of adult mice resulted in a nearly complete loss of AMPK activity. Loss of LKB1 function resulted in hyperglycemia with increased gluconeogenic and lipogenic gene expression. In LKB1-deficient livers, TORC2, a transcriptional coactivator of CREB (cAMP response element-binding protein), was dephosphorylated and entered the nucleus, driving the expression of peroxisome proliferator-activated receptor-gamma coactivator 1alpha (PGC-1alpha), which in turn drives gluconeogenesis. Adenoviral small hairpin RNA (shRNA) for TORC2 reduced PGC-1alpha expression and normalized blood glucose levels in mice with deleted liver LKB1, indicating that TORC2 is a critical target of LKB1/AMPK signals in the regulation of gluconeogenesis. Finally, we show that metformin, one of the most widely prescribed type 2 diabetes therapeutics, requires LKB1 in the liver to lower blood glucose levels.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3074427/" 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/PMC3074427/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shaw, Reuben J -- Lamia, Katja A -- Vasquez, Debbie -- Koo, Seung-Hoi -- Bardeesy, Nabeel -- Depinho, Ronald A -- Montminy, Marc -- Cantley, Lewis C -- CA84313/CA/NCI NIH HHS/ -- GM056203/GM/NIGMS NIH HHS/ -- GM37828/GM/NIGMS NIH HHS/ -- R01 GM056203/GM/NIGMS NIH HHS/ -- R01 GM056203-09/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2005 Dec 9;310(5754):1642-6. Epub 2005 Nov 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA. shaw@salk.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16308421" target="_blank"〉PubMed〈/a〉
    Keywords: AMP-Activated Protein Kinases ; Animals ; Blood Glucose/analysis ; Diabetes Mellitus, Type 2/drug therapy/metabolism ; Enzyme Activation ; Female ; Gene Expression Regulation ; Gluconeogenesis/genetics ; Glucose/*metabolism ; HeLa Cells ; Homeostasis ; Humans ; Hyperglycemia/drug therapy/metabolism ; Hypoglycemic Agents/*pharmacology/therapeutic use ; Lipogenesis/genetics ; Liver/enzymology/*metabolism ; Male ; Metformin/*pharmacology/therapeutic use ; Mice ; Mice, Obese ; Multienzyme Complexes/*metabolism ; Phosphorylation ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Signal Transduction ; Trans-Activators/genetics/metabolism ; Transcription Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Biochemistry. PI3K charges ahead (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-07-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, Jennifer Y -- Engelman, Jeffrey A -- Cantley, Lewis C -- R01 GM041890/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2007 Jul 13;317(5835):206-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Systems Biology, Harvard Medical School and Division of Signal Transduction, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17626872" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents/pharmacology/therapeutic use ; Catalytic Domain ; Cell Membrane/enzymology ; Cell Proliferation ; Cell Survival ; Dimerization ; Enzyme Inhibitors/pharmacology/therapeutic use ; Humans ; Mutation ; Neoplasms/drug therapy/*genetics ; Phosphatidylinositol 3-Kinases/antagonists & ; inhibitors/chemistry/*genetics/*metabolism ; Phosphorylation ; Protein Structure, Tertiary ; Protein Subunits ; src Homology Domains
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    MET amplification leads to gefitinib resistance in lung cancer by activating ERBB3 signaling (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-04-28
    Description: The epidermal growth factor receptor (EGFR) kinase inhibitors gefitinib and erlotinib are effective treatments for lung cancers with EGFR activating mutations, but these tumors invariably develop drug resistance. Here, we describe a gefitinib-sensitive lung cancer cell line that developed resistance to gefitinib as a result of focal amplification of the MET proto-oncogene. inhibition of MET signaling in these cells restored their sensitivity to gefitinib. MET amplification was detected in 4 of 18 (22%) lung cancer specimens that had developed resistance to gefitinib or erlotinib. We find that amplification of MET causes gefitinib resistance by driving ERBB3 (HER3)-dependent activation of PI3K, a pathway thought to be specific to EGFR/ERBB family receptors. Thus, we propose that MET amplification may promote drug resistance in other ERBB-driven cancers as well.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Engelman, Jeffrey A -- Zejnullahu, Kreshnik -- Mitsudomi, Tetsuya -- Song, Youngchul -- Hyland, Courtney -- Park, Joon Oh -- Lindeman, Neal -- Gale, Christopher-Michael -- Zhao, Xiaojun -- Christensen, James -- Kosaka, Takayuki -- Holmes, Alison J -- Rogers, Andrew M -- Cappuzzo, Federico -- Mok, Tony -- Lee, Charles -- Johnson, Bruce E -- Cantley, Lewis C -- Janne, Pasi A -- 1K12CA87723-01/CA/NCI NIH HHS/ -- GM41890/GM/NIGMS NIH HHS/ -- K08CA120060-01/CA/NCI NIH HHS/ -- P01 CA089021/CA/NCI NIH HHS/ -- P20CA90578-02/CA/NCI NIH HHS/ -- R01 GM041890/GM/NIGMS NIH HHS/ -- R01-CA111560/CA/NCI NIH HHS/ -- R01CA114465-01/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2007 May 18;316(5827):1039-43. Epub 2007 Apr 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Massachusetts General Hospital Cancer Center, Boston, MA 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17463250" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents/pharmacology/therapeutic use ; CHO Cells ; Carcinoma, Non-Small-Cell Lung/drug therapy/genetics/*metabolism/*pathology ; Cell Line, Tumor ; Cell Proliferation/drug effects ; Cricetinae ; Cricetulus ; Drug Resistance, Neoplasm ; Enzyme Inhibitors ; *Gene Amplification ; Humans ; Indoles/pharmacology ; Lung Neoplasms/drug therapy/genetics/metabolism/pathology ; Phosphatidylinositol 3-Kinases/metabolism ; Phosphorylation ; Proto-Oncogene Proteins/*genetics/metabolism ; Proto-Oncogene Proteins c-akt/metabolism ; Proto-Oncogene Proteins c-met ; Quinazolines/*pharmacology/therapeutic use ; Receptor, ErbB-3/*metabolism ; Receptors, Growth Factor/*genetics/metabolism ; *Signal Transduction ; Sulfones/pharmacology
    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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