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10.1152/ajpcell.00266.2015 http://scihub22266oqcxt.onion/10.1152/ajpcell.00266.2015 C4824156!4824156!26739493     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=26739493&cmd=llinks): Failed to open stream: HTTP request failed! 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Hydrophobic motif site-phosphorylated protein kinase C?II between mTORC2 and Akt regulates high glucose-induced mesangial cell hypertrophy |pdf=|usr=}}{{26739493}} gab.com Text Hydrophobic motif site-phosphorylated protein kinase C II between mTORC2 and Akt regulates high glucose-induced mesangial cell hypertrophy JO: Am J Physiol Cell Physiol http://www.kidney.de/pget.php?&tw=1&pmid=26739493 #FOAvip PKC?II controls the pathologic features of diabetic nephropathy, including glomerular mesangial cell hypertrophy. PKC?II contains the COOH-terminal hydrophobic motif site Ser-660. Whether this hydrophobic motif phosphorylation contributes to high glucose-induced mesangial cell hypertrophy has not been determined. Here we show that, in mesangial cells, high glucose increased phosphorylation of PKC?II at Ser-660 in a phosphatidylinositol 3-kinase (PI3-kinase)-dependent manner. Using siRNAs to downregulate PKC?II, dominant negative PKC?II, and PKC?II hydrophobic motif phosphorylation-deficient mutant, we found that PKC?II regulates activation of mechanistic target of rapamycin complex 1 (mTORC1) and mesangial cell hypertrophy by high glucose. PKC?II via its phosphorylation at Ser-660 regulated phosphorylation of Akt at both catalytic loop and hydrophobic motif sites, resulting in phosphorylation and inactivation of its substrate PRAS40. Specific inhibition of mTORC2 increased mTORC1 activity and induced mesangial cell hypertrophy. In contrast, inhibition of mTORC2 decreased the phosphorylation of PKC?II and Akt, leading to inhibition of PRAS40 phosphorylation and mTORC1 activity and prevented mesangial cell hypertrophy in response to high glucose; expression of constitutively active Akt or mTORC1 restored mesangial cell hypertrophy. Moreover, constitutively active PKC?II reversed the inhibition of high glucose-stimulated Akt phosphorylation and mesangial cell hypertrophy induced by suppression of mTORC2. Finally, using renal cortexes from type 1 diabetic mice, we found that increased phosphorylation of PKC?II at Ser-660 was associated with enhanced Akt phosphorylation and mTORC1 activation. Collectively, our findings identify a signaling route connecting PI3-kinase to mTORC2 to phosphorylate PKC?II at the hydrophobic motif site necessary for Akt phosphorylation and mTORC1 activation, leading to mesangial cell hypertrophy. Twit Text FOAVip Hydrophobic motif site-phosphorylated protein kinase C II between mTORC2 and Akt regulates high glucose-induced mesangial cell hypertrophy ????Am J Physiol Cell Physiol http://www.kidney.de/pget.php?&tw=1&pmid=26739493 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=26739493 #FOAvip English Wikipedia <ref>{{Cite pmid|26739493}}</ref> Hydrophobic motif site-phosphorylated protein kinase C?II between mTORC2 and Akt regulates high glucose-induced mesangial cell hypertrophy #MMPMID26739493 Das F; Ghosh-Choudhury N; Mariappan MM; Kasinath BS; Choudhury GG Am J Physiol Cell Physiol 2016[Apr]; 310 (7): C583-96 PMID26739493show ga PKC?II controls the pathologic features of diabetic nephropathy, including glomerular mesangial cell hypertrophy. PKC?II contains the COOH-terminal hydrophobic motif site Ser-660. Whether this hydrophobic motif phosphorylation contributes to high glucose-induced mesangial cell hypertrophy has not been determined. Here we show that, in mesangial cells, high glucose increased phosphorylation of PKC?II at Ser-660 in a phosphatidylinositol 3-kinase (PI3-kinase)-dependent manner. Using siRNAs to downregulate PKC?II, dominant negative PKC?II, and PKC?II hydrophobic motif phosphorylation-deficient mutant, we found that PKC?II regulates activation of mechanistic target of rapamycin complex 1 (mTORC1) and mesangial cell hypertrophy by high glucose. PKC?II via its phosphorylation at Ser-660 regulated phosphorylation of Akt at both catalytic loop and hydrophobic motif sites, resulting in phosphorylation and inactivation of its substrate PRAS40. Specific inhibition of mTORC2 increased mTORC1 activity and induced mesangial cell hypertrophy. In contrast, inhibition of mTORC2 decreased the phosphorylation of PKC?II and Akt, leading to inhibition of PRAS40 phosphorylation and mTORC1 activity and prevented mesangial cell hypertrophy in response to high glucose; expression of constitutively active Akt or mTORC1 restored mesangial cell hypertrophy. Moreover, constitutively active PKC?II reversed the inhibition of high glucose-stimulated Akt phosphorylation and mesangial cell hypertrophy induced by suppression of mTORC2. Finally, using renal cortexes from type 1 diabetic mice, we found that increased phosphorylation of PKC?II at Ser-660 was associated with enhanced Akt phosphorylation and mTORC1 activation. Collectively, our findings identify a signaling route connecting PI3-kinase to mTORC2 to phosphorylate PKC?II at the hydrophobic motif site necessary for Akt phosphorylation and mTORC1 activation, leading to mesangial cell hypertrophy. äHydrophobic motif site-phosphorylated protein kinase C?II between mTOR(epmc).pdf DeepDyve Pubget Overpricing