Metformin plays a dual role in MIN6 pancreatic β cell function through AMPK-dependent autophagy.

ABSTRACT: Metformin improves insulin sensitivity in insulin sensitive tissues such as liver, muscle and fat. However, the functional roles and the underlying mechanism of metformin action in pancreatic β cells remain elusive. Here we show that, under normal growth condition, metformin suppresses MIN6 β cell proliferation and promotes apoptosis via an AMPK-dependent and autophagy-mediated mechanism. On the other hand, metformin protects MIN6 cells against palmitic acid (PA)-induced apoptosis. Our findings indicate that metformin plays a dual role in β cell survival and overdose of this anti-diabetic drug itself may lead to potential β cell toxicity.

SUBMITTER: Jiang Y 

PROVIDER: S-EPMC3957082 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature