Title : Activation of AMPK by Telmisartan Decreases Basal and PDGF-stimulated VSMC Proliferation via Inhibiting the mTOR/p70S6K Signaling Axis.

Pub. Date : 2020 Sep 7

PMID : 32893519






6 Functional Relationships(s)
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1 RESULTS: Telmisartan decreased VSMC proliferation, which was accompanied by decreased phosphorylations of mammalian target of rapamycin (mTOR) at Ser2448 (p-mTOR-Ser2448) and p70 S6 kinase (p70S6K) at Thr389 (p-p70S6K-Thr389) in dose- and time-dependent manners. Telmisartan ribosomal protein S6 kinase B1 Homo sapiens
2 RESULTS: Telmisartan decreased VSMC proliferation, which was accompanied by decreased phosphorylations of mammalian target of rapamycin (mTOR) at Ser2448 (p-mTOR-Ser2448) and p70 S6 kinase (p70S6K) at Thr389 (p-p70S6K-Thr389) in dose- and time-dependent manners. Telmisartan ribosomal protein S6 kinase B1 Homo sapiens
3 RESULTS: Telmisartan decreased VSMC proliferation, which was accompanied by decreased phosphorylations of mammalian target of rapamycin (mTOR) at Ser2448 (p-mTOR-Ser2448) and p70 S6 kinase (p70S6K) at Thr389 (p-p70S6K-Thr389) in dose- and time-dependent manners. Telmisartan ribosomal protein S6 kinase B1 Homo sapiens
4 Co-treatment with compound C, a specific AMPK inhibitor, or ectopic expression of the dn-AMPKalpha1 gene, significantly reversed telmisartan-inhibited VSMC proliferation, p-mTOR-Ser2448 and p-p70S6K-Thr389 levels. Telmisartan ribosomal protein S6 kinase B1 Homo sapiens
5 Among the ARBs tested (including losartan and fimasartan), only telmisartan increased p-AMPK-Thr172 and decreased p-mTOR-Ser2448, p-p70S6K-Thr389, and VSMC proliferation. Telmisartan ribosomal protein S6 kinase B1 Homo sapiens
6 CONCLUSION: These results demonstrated that telmisartan-activated AMPK inhibited basal and PDGF-stimulated VSMC proliferation, at least in part, by downregulating the mTOR/p70S6K signaling axis in a PPARgamma-independent manner. Telmisartan ribosomal protein S6 kinase B1 Homo sapiens