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Li, X-N; Bu, H-M; Ma, X-H; Lu, Sh; Zhao, Sh; Cui, Y-L; Sun, J
Experimental and clinical endocrinology & diabetes, 02/2017, Volume: 125, Issue: 2Journal Article
Research has shown that the incidence of prostate cancer is increased in patients with type 2 diabetes mellitus (T2DM) 1. Glucagon-like peptide-1 (GLP-1) is a gastrointestinal hormone that enhances glucose-dependent insulin secretion and suppresses glucagon release. Here, we examined the effect of exenatide and liraglutide, 2 types of GLP-1 analogues, on prostate cancer cells growth by CCK-8 assay, Hoechst33258 staining assay, and western blot analysis of apoptosis-related proteins Bax and Bcl-2. Also the kinase pathways maybe involved and the expression of GLP-1 receptor (GLP-1 R) in LNCap cells was detected. In our experiments, exenatide and liraglutide significantly inhibited the proliferation of the LNCap cell lines and induced the cell apoptosis. Exenatide (1-100 nmol/L) increased the ratio of Bax/Bcl-2 in a dose-dependent manner, whereas liraglutide increased Bax/Bcl-2 ratio only at concentrations of 10 nmol/L. And we found that GLP-1 analogues activate p38 but not ERK1/2 or AKT in LNCap cells. And classical GLP-1 receptor was detected in LNCap cells. These data suggest that exenatide and liraglutide attenuate prostate cancer growth through regulating P38 pathway by binding with GLP-1R.
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