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- W2105665055 abstract "The mechanism of the cardioprotective action of metformin is incompletely understood. We determined the role of metformin in cardiac fibrosis and investigated the mechanism. Ten-week-old male mice (C57BL/6) were subjected to left ventricular pressure overload by transverse aortic constriction. Mice received metformin (200 mg/kg/day) or normal saline for 6 weeks. Metformin inhibited cardiac fibrosis (fibrosis area/total heart area: 0.6 ± 0.3 vs. 3.6 ± 0.9%, P < 0.01) induced by pressure overload and improved cardiac diastolic function (left ventricular end-diastolic pressure: 5.2 ± 0.9 vs. 11.0 ± 1.6 mmHg, P < 0.05). Metformin inhibited the pressure overload-induced transforming growth factor (TGF)-β1 production in mouse hearts and the TGF-β1-induced collagen synthesis in cultured adult mouse cardiac fibroblasts (CFs). Metformin suppressed the phosphorylation of Smad3 in response to TGF-β1 in CFs. Metformin also inhibited the nuclear translocation and transcriptional activity of Smad3 in CFs. Metformin inhibited cardiac fibrosis induced by pressure overload in vivo and inhibited collagen synthesis in CFs probably via inhibition of the TGF-β1–Smad3 signalling pathway. These findings provide a new mechanism for the cardioprotective effects of metformin." @default.
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- W2105665055 date "2010-03-03" @default.
- W2105665055 modified "2023-10-11" @default.
- W2105665055 title "Metformin attenuates cardiac fibrosis by inhibiting the TGFβ1–Smad3 signalling pathway" @default.
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- W2105665055 doi "https://doi.org/10.1093/cvr/cvq066" @default.
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