Growth Hormone-releasing Hormone Disruption Extends Lifespan and Regulates Response to Caloric Restriction in Mice

Overview

Journal Elife

Specialty Biology

Date 2013 Nov 1

PMID 24175087

Citations 88

Authors

Liou Y Sun

Adam Spong

William R Swindell

Yimin Fang

Cristal Hill

Joshua A Huber

Jacob D Boehm

Reyhan Westbrook

Roberto Salvatori

Andrzej Bartke

Affiliations

Soon will be listed here.

Abstract

We examine the impact of targeted disruption of growth hormone-releasing hormone (GHRH) in mice on longevity and the putative mechanisms of delayed aging. GHRH knockout mice are remarkably long-lived, exhibiting major shifts in the expression of genes related to xenobiotic detoxification, stress resistance, and insulin signaling. These mutant mice also have increased adiponectin levels and alterations in glucose homeostasis consistent with the removal of the counter-insulin effects of growth hormone. While these effects overlap with those of caloric restriction, we show that the effects of caloric restriction (CR) and the GHRH mutation are additive, with lifespan of GHRH-KO mutants further increased by CR. We conclude that GHRH-KO mice feature perturbations in a network of signaling pathways related to stress resistance, metabolic control and inflammation, and therefore provide a new model that can be used to explore links between GHRH repression, downregulation of the somatotropic axis, and extended longevity. DOI:http://dx.doi.org/10.7554/eLife.01098.001.

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