Role of Adipose and Hepatic Atypical Protein Kinase C Lambda (PKCλ) in the Development of Obesity and Glucose Intolerance

Overview

Journal Adipocyte

Specialties Cell Biology
Endocrinology
Physiology

Date 2013 May 24

PMID 23700535

Citations 5

Authors

Kirk M Habegger

Daniela Matzke

Nickki Ottaway

Jazzminn Hembree

Jenna Holland

Christine Raver

Johannes Mansfeld

Timo D Muller

Diego Perez-Tilve

Paul T Pfluger

Sang Jun Lee

Maria Diaz-Meco

Jorge Moscat

Michael Leitges

Matthias H Tschop

Susanna M Hofmann

Affiliations

Soon will be listed here.

Abstract

PKCλ, an atypical member of the multifunctional protein kinase C family, has been implicated in the regulation of insulin-stimulated glucose transport and of the intracellular immune response. To further elucidate the role of this cellular regulator in diet-induced obesity and insulin resistance, we generated both liver (PKC-Alb) and adipose tissue (PKC-Ap2) specific knockout mice. Body weight, fat mass, food intake, glucose homeostasis and energy expenditure were evaluated in mice maintained on either chow or high fat diet (HFD). Ablation of PKCλ from the adipose tissue resulted in mice that were indistinguishable from their wild-type littermates. However, PKC-Alb mice were resistant to diet-induced obesity (DIO). Surprisingly this DIO resistance was not associated with either a reduction in caloric intake or an increase in energy expenditure as compared with their wild-type littermates. Furthermore, these mice displayed an improvement in glucose tolerance. When maintained on chow diet, these mice were similar to wild types in respect to body weight and fat mass, yet insulin sensitivity was impaired compared with wt littermates. Taken together these data suggest that hepatic PKCλ is modulating insulin-mediated glucose turnover and response to high fat diet feeding, thus offering a deeper understanding of an important target for anti-obesity therapeutics.

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