Cholesterol-induced Activation of TRPM7 Regulates Cell Proliferation, Migration, and Viability of Human Prostate Cells

Overview

Journal Biochim Biophys Acta

Specialties Biochemistry
Biophysics

Date 2014 Apr 29

PMID 24769209

Citations 49

Authors

Yuyang Sun

Pramod Sukumaran

Archana Varma

Susan Derry

Abe E Sahmoun

Brij B Singh

Affiliations

Soon will be listed here.

Abstract

Cholesterol has been shown to promote cell proliferation/migration in many cells; however the mechanism(s) have not yet been fully identified. Here we demonstrate that cholesterol increases Ca(2+) entry via the TRPM7 channel, which promoted proliferation of prostate cells by inducing the activation of the AKT and/or the ERK pathway. Additionally, cholesterol mediated Ca(2+) entry induced calpain activity that showed a decrease in E-cadherin expression, which together could lead to migration of prostate cancer cells. An overexpression of TRPM7 significantly facilitated cholesterol dependent Ca(2+) entry, cell proliferation and tumor growth. Whereas, TRPM7 silencing or inhibition of cholesterol synthesis by statin showed a significant decrease in cholesterol-mediated activation of TRPM7, cell proliferation, and migration of prostate cancer cells. Consistent with these results, statin intake was inversely correlated with prostate cancer patients and increase in TRPM7 expression was observed in samples obtained from prostate cancer patients. Altogether, we provide evidence that cholesterol-mediated activation of TRPM7 is important for prostate cancer and have identified that TRPM7 could be essential for initiation and/or progression of prostate cancer.

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