The p21-activated kinase (PAK1) is involved in diet-induced beta cell mass expansion and survival in mice and human islets.

ABSTRACT:

Aims/hypothesis

Human islets from type 2 diabetic donors are reportedly 80% deficient in the p21 (Cdc42/Rac)-activated kinase, PAK1. PAK1 is implicated in beta cell function and maintenance of beta cell mass. We questioned the mechanism(s) by which PAK1 deficiency potentially contributes to increased susceptibility to type 2 diabetes.

Methods

Non-diabetic human islets and INS 832/13 beta cells cultured under diabetogenic conditions (i.e. with specific cytokines or under glucolipotoxic [GLT] conditions) were evaluated for changes to PAK1 signalling. Combined effects of PAK1 deficiency with GLT stress were assessed using classic knockout (Pak1 (-/-) ) mice fed a 45% energy from fat/palmitate-based, 'western' diet (WD). INS 832/13 cells overexpressing or depleted of PAK1 were a

SUBMITTER: Ahn M 

PROVIDER: S-EPMC5266538 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature