Pathologic HIF1α signaling drives adipose progenitor dysfunction in obesity.
Journal Article (Journal Article)
Adipose precursor cells (APCs) exhibit regional variation in response to obesity, for unclear reasons. Here, we reveal that HIFα-induced PDGFRβ signaling within murine white adipose tissue (WAT) PDGFRβ+ cells drives inhibitory serine 112 (S112) phosphorylation of PPARγ, the master regulator of adipogenesis. Levels of PPARγ S112 phosphorylation in WAT PDGFRβ+ cells are depot dependent, with levels of PPARγ phosphorylation in PDGFRβ+ cells inversely correlating with their capacity for adipogenesis upon high-fat-diet feeding. HIFα suppression in PDGFRβ+ progenitors promotes subcutaneous and intra-abdominal adipogenesis, healthy WAT remodeling, and improved metabolic health in obesity. These metabolic benefits are mimicked by treatment of obese mice with the PDGFR antagonist Imatinib, which promotes adipocyte hyperplasia and glucose tolerance in a progenitor cell PPARγ-dependent manner. Our studies unveil a mechanism underlying depot-specific responses of APCs to high-fat feeding and highlight the potential for APCs to be targeted pharmacologically to improve metabolic health in obesity.
Full Text
Duke Authors
Cited Authors
- Shao, M; Hepler, C; Zhang, Q; Shan, B; Vishvanath, L; Henry, GH; Zhao, S; An, YA; Wu, Y; Strand, DW; Gupta, RK
Published Date
- April 1, 2021
Published In
Volume / Issue
- 28 / 4
Start / End Page
- 685 - 701.e7
PubMed ID
- 33539723
Pubmed Central ID
- PMC8026607
Electronic International Standard Serial Number (EISSN)
- 1875-9777
Digital Object Identifier (DOI)
- 10.1016/j.stem.2020.12.008
Language
- eng
Conference Location
- United States