pubmed-article:12048257 | rdf:type | pubmed:Citation | lld:pubmed |
pubmed-article:12048257 | lifeskim:mentions | umls-concept:C0227651 | lld:lifeskim |
pubmed-article:12048257 | lifeskim:mentions | umls-concept:C0011881 | lld:lifeskim |
pubmed-article:12048257 | lifeskim:mentions | umls-concept:C0288472 | lld:lifeskim |
pubmed-article:12048257 | lifeskim:mentions | umls-concept:C0020374 | lld:lifeskim |
pubmed-article:12048257 | lifeskim:mentions | umls-concept:C0174045 | lld:lifeskim |
pubmed-article:12048257 | lifeskim:mentions | umls-concept:C0249197 | lld:lifeskim |
pubmed-article:12048257 | lifeskim:mentions | umls-concept:C1420626 | lld:lifeskim |
pubmed-article:12048257 | lifeskim:mentions | umls-concept:C0086982 | lld:lifeskim |
pubmed-article:12048257 | lifeskim:mentions | umls-concept:C1709059 | lld:lifeskim |
pubmed-article:12048257 | lifeskim:mentions | umls-concept:C0243077 | lld:lifeskim |
pubmed-article:12048257 | lifeskim:mentions | umls-concept:C1514485 | lld:lifeskim |
pubmed-article:12048257 | pubmed:issue | 12 | lld:pubmed |
pubmed-article:12048257 | pubmed:dateCreated | 2002-6-12 | lld:pubmed |
pubmed-article:12048257 | pubmed:abstractText | Inhibitors of 3-hydroxy-3-methylglutaryl CoA (HMG-CoA) reductase, also known as statins, are lipid-lowering agents widely used in the prevention of coronary heart disease. Recent experimental and clinical data, however, indicate that the overall benefits of statin therapy may exceed its cholesterol-lowering properties. We postulate that statins may ameliorate the detrimental effects of high glucose (HG)-induced proliferation of mesangial cells (MCs), a feature of early stages of diabetic nephropathy, by preventing Rho isoprenylation. Rat MCs cultured in HG milieu were treated with and without simvastatin, an HMG-CoA reductase inhibitor. Simvastatin inhibited HG-induced MC proliferation as measured by [(3)H]thymidine incorporation. This inhibitory effect was reversed with geranylgeranyl pyrophosphate, an isoprenoid intermediate of the cholesterol biosynthetic pathway. At the cell-cycle level, the HG-induced proliferation of MCs was associated with a decrease in cyclin dependent kinase (CDK) inhibitor p21 protein expression accompanied by an increase in CDK4 and CDK2 kinase activities. Simvastatin reversed the down-regulation of p21 protein expression and decreased CDK4 and CDK2 kinase activities. Exposure of MCs to HG was associated with an increase in membrane-associated Ras and Rho GTPase protein expression. Cotreatment of MCs with simvastatin reversed HG-induced Ras and Rho membrane translocation. Immunofluorescence microscopy revealed that the overexpression of the dominant-negative RhoA led to a significant increase in p21 expression. Our data suggest that simvastatin represses the HG-induced Rho GTPase/p21 signaling in glomerular MCs. Thus, this study provides a molecular basis for the use of statins, independently of their cholesterol-lowering effect, in early stages of diabetic nephropathy. | lld:pubmed |
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pubmed-article:12048257 | pubmed:language | eng | lld:pubmed |
pubmed-article:12048257 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
pubmed-article:12048257 | pubmed:citationSubset | IM | lld:pubmed |
pubmed-article:12048257 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
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pubmed-article:12048257 | pubmed:status | MEDLINE | lld:pubmed |
pubmed-article:12048257 | pubmed:month | Jun | lld:pubmed |
pubmed-article:12048257 | pubmed:issn | 0027-8424 | lld:pubmed |
pubmed-article:12048257 | pubmed:author | pubmed-author:SunLinL | lld:pubmed |
pubmed-article:12048257 | pubmed:author | pubmed-author:KanwarYashpal... | lld:pubmed |
pubmed-article:12048257 | pubmed:author | pubmed-author:DaneshFarhad... | lld:pubmed |
pubmed-article:12048257 | pubmed:author | pubmed-author:SadeghiMehran... | lld:pubmed |
pubmed-article:12048257 | pubmed:author | pubmed-author:AmroNailN | lld:pubmed |
pubmed-article:12048257 | pubmed:author | pubmed-author:PhilipsCarrie... | lld:pubmed |
pubmed-article:12048257 | pubmed:author | pubmed-author:ZengLixiaL | lld:pubmed |
pubmed-article:12048257 | pubmed:author | pubmed-author:SahaiAtulA | lld:pubmed |
pubmed-article:12048257 | pubmed:issnType | Print | lld:pubmed |
pubmed-article:12048257 | pubmed:day | 11 | lld:pubmed |
pubmed-article:12048257 | pubmed:volume | 99 | lld:pubmed |
pubmed-article:12048257 | pubmed:owner | NLM | lld:pubmed |
pubmed-article:12048257 | pubmed:authorsComplete | Y | lld:pubmed |
pubmed-article:12048257 | pubmed:pagination | 8301-5 | lld:pubmed |
pubmed-article:12048257 | pubmed:dateRevised | 2009-11-19 | lld:pubmed |
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