high glucose induces n-linked glycosylation-mediated functional upregulation and overexpression of cav3.2 t-type calcium channels in neuroendocrine-like differentiated human prostate cancer cells

Given that Cav3.2 T-type Ca2+ channels were functionally regulated by asparagine (N)-linked glycosylation, we examined effects of high glucose on the function of Cav3.2, known to regulate secretory function, in neuroendocrine-like differentiated prostate cancer LNCaP cells. High glucose accelerated the increased channel function and overexpression of Cav3.2 during neuroendocrine differentiation, the former prevented by enzymatic inhibition of N-glycosylation and cleavage of N-glycans. Hyperglycemia thus appears to induce N-linked glycosylation-mediated functional upregulation and overexpression of Cav3.2 in neuroendocrine-like differentiated prostate cancer cells.