TGF-β1 downregulation in the hypothalamus of obese mice through acute exercise.

Abstract:

:Obesity and aging lead to abnormal transforming growth factor-β1 (TGF-β1) signaling in the hypothalamus, triggering the imbalance on glucose metabolism and energy homeostasis. Here, we determine the effect of acute exercise on TGF-β1 expression in the hypothalamus of two models of obesity in mice. The bioinformatics analysis was performed to evaluate the correlation between hypothalamic Tgf-β1 messenger RNA (mRNA) and genes related to thermogenesis in the brown adipose tissue (BAT) by using a large panel of isogenic BXD mice. Thereafter, leptin-deficient (ob/ob) mice and obese C57BL/6 mice fed on a high-fat diet (HFD) were submitted to the acute exercise protocol. Transcriptomic analysis by using BXD mouse reference population database revealed that hypothalamic Tgf-β1 mRNA is negatively correlated with genes related to thermogenesis in brown adipose tissue of BXD mice, such as peroxisome proliferator-activated receptor gamma coactivator and is positively correlated with respiratory exchange ratio. In agreement with these results, leptin-deficient (ob/ob) and HFD-fed mice displayed high levels of Tgf-β1 mRNA in the hypothalamus and reduction of Pgc1α mRNA in BAT. Interestingly, an acute exercise session reduced TGF-β1 expression in the hypothalamus, increased Pgc1α mRNA in the BAT and reduced food consumption in obese mice. Our results demonstrated that acute physical exercise suppressed hypothalamic TGF-β1 expression, increasing Pgc1α mRNA in BAT in obese mice.

journal_name

J Cell Biochem

authors

Silva VRR,Lenhare L,Katashima CK,Morari J,M-Assis A,Gaspar RS,da Silva ASR,Moura LP,Pauli JR,Cintra DE,Velloso LA,Ropelle ER

doi

10.1002/jcb.29124

subject

Has Abstract

pub_date

2019-10-01 00:00:00

pages

18186-18192

issue

10

eissn

0730-2312

issn

1097-4644

journal_volume

120

pub_type

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