Short-term high fat diet increases the presence of astrocytes in the hypothalamus of C57BL6 mice without altering leptin sensitivity

Abstract

Diet-induced obesity is associated with hypothalamic inflammation and this phenomenon has been proposed to explain leptin resistance. In this study we used a short-term high fat diet (HFD) paradigm for 10days and analysed the cellular and physiological responses to leptin administration in C57BL6 mice. In parallel we performed GFAP immuno-staining to measure the presence of astrocytes in the arcuate nucleus of the hypothalamus (ARH) after 10 days and 20 weeks of HFD. Interestingly our results demonstrate that the presence of star-like astrocytes is significantly increased after 10 days of HFD but this is not associated with the absence of cellular and physiological response to leptin administration in mice. All together our study suggest that star-like astrocytes rapidly increase in numbers in the ARH in response to HFD but this phenomenon cannot explain the development of leptin resistance by itself.

This article is protected by copyright. All rights reserved.

http://ift.tt/2td0Pbl