Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/147541
Title: Angiotensin type 2 receptor activation promotes browning of white adipose tissue and brown adipogenesis
Authors: Than, Aung
Xu, Shaohai
Li, Ru
Leow, Melvin Khee-Shing
Sun, Lei
Chen, Peng
Keywords: Science
Issue Date: 2017
Source: Than, A., Xu, S., Li, R., Leow, M. K., Sun, L. & Chen, P. (2017). Angiotensin type 2 receptor activation promotes browning of white adipose tissue and brown adipogenesis. Signal Transduction and Targeted Therapy, 2(1), 17022-. https://dx.doi.org/10.1038/sigtrans.2017.22
Journal: Signal Transduction and Targeted Therapy
Abstract: Brown adipose tissue dissipates energy in the form of heat. Recent studies have shown that adult humans possess both classical brown and beige adipocytes (brown-like adipocytes in white adipose tissue, WAT), and stimulating brown and beige adipocyte formation can be a new avenue to treat obesity. Angiotensin II (AngII) is a peptide hormone that plays important roles in energy metabolism via its angiotensin type 1 or type 2 receptors (AT1R and AT2R). Adipose tissue is a major source of AngII and expresses both types of its receptors, implying the autocrine and paracrine role of AngII in regulating adipose functions and self-remodeling. Here, based on the in vitro studies on primary cultures of mouse white adipocytes, we report that, AT2R activation, either by AngII or AT2R agonist (C21), induces white adipocyte browning, by increasing PPARγ expression, at least in part, via ERK1/2, PI3kinase/Akt and AMPK signaling pathways. It is also found that AngII-AT2R enhances brown adipogenesis. In the in vivo studies on mice, administration of AT1R antagonist (ZD7155) or AT2R agonist (C21) leads to the increase of WAT browning, body temperature and serum adiponectin, as well as the decrease of WAT mass and the serum levels of TNFα, triglycerides and free fatty acids. In addition, AT2R-induced browning effect is also observed in human white adipocytes, as evidenced by the increased UCP1 expression and oxygen consumption. Finally, we provide evidence that AT2R plays important roles in hormone T3-induced white adipose browning. This study, for the first time, reveals the browning and brown adipogenic effects of AT2R and suggests a potential therapeutic target to combat obesity and related metabolic disorders.
URI: https://hdl.handle.net/10356/147541
ISSN: 2059-3635
DOI: 10.1038/sigtrans.2017.22
Schools: School of Chemical and Biomedical Engineering 
Rights: © 2017 The Author(s). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCBE Journal Articles

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