Differential effects of early-life nutrient restriction in long-lived GHR-KO and normal mice

GeroScience
Yimin FangAndrzej Bartke

Abstract

There is increasing evidence that growth hormone (GH) and insulin-like growth factor 1 (IGF-1) signaling (collectively referred to as somatotropic signaling) during development has a profound influence on aging and longevity. Moreover, the absence of GH action was shown to modify responses of adult mice to calorie restriction (CR) and other antiaging interventions. It was therefore of interest to determine whether GH resistance in GH receptor knockout (GHR-KO) mice would modify the effects of mild pre-weaning CR imposed by increasing the number of pups in a litter (the so-called litter crowding). In addition to the expected impact on body weight, litter crowding affected glucose homeostasis, hepatic expression of IGF-1 and genes related to lipid metabolism, and expression of inflammatory markers in white adipose tissue, with some of these effects persisting until the age of 2 years. Litter crowding failed to further extend the remarkable longevity of GHR-KO mice and, instead, reduced late life survival of GHR-KO females, an effect opposite to the changes detected in normal animals. We conclude that the absence of GH actions alters the responses to pre-weaning CR and prevents this intervention from extending longevity.

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Citations

Mar 16, 2019·American Journal of Physiology. Heart and Circulatory Physiology·Anna CsiszarZoltan Ungvari
Mar 9, 2019·American Journal of Physiology. Heart and Circulatory Physiology·Gabor A FulopZoltan Ungvari
Dec 28, 2018·Physiology International·A YabluchanskiyS Tarantini
Jan 25, 2020·GeroScience·Diego Cañadas-LozanoMario D Cordero
Oct 23, 2018·GeroScience·D ReglodiA Bardosi

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