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Seo JB, Riopel M, Cabrales P, Huh JY, Bandyopadhyay GK, Andreyev AY, Murphy AN, Beeman SC, Smith GI, Klein S, Lee YS, Olefsky JM. Knockdown of Ant2 Reduces Adipocyte Hypoxia And Improves Insulin Resistance in Obesity. Nat Metab 2019; 1:86-97. [PMID: 31528845 PMCID: PMC6746433 DOI: 10.1038/s42255-018-0003-x] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Decreased adipose tissue oxygen tension and increased HIF-1α expression can trigger adipose tissue inflammation and dysfunction in obesity. Our current understanding of obesity-associated decreased adipose tissue oxygen tension is mainly focused on changes in oxygen supply and angiogenesis. Here, we demonstrate that increased adipocyte O2 demand, mediated by ANT2 activity, is the dominant cause of adipocyte hypoxia. Deletion of adipocyte Ant2 improves obesity-induced intracellular adipocyte hypoxia by decreasing obesity-induced adipocyte oxygen demand, without effects on mitochondrial number or mass, or oligomycin-sensitive respiration. This led to decreased adipose tissue HIF-1α expression and inflammation with improved glucose tolerance and insulin resistance in both a preventative or therapeutic setting. Our results suggest that ANT2 may be a target for the development of insulin sensitizing drugs and that ANT2 inhibition might have clinical utility.
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Affiliation(s)
- Jong Bae Seo
- Department of Medicine, Division of Endocrinology and Metabolism, University of California San Diego, La Jolla, CA 92093, USA
| | - Matthew Riopel
- Department of Medicine, Division of Endocrinology and Metabolism, University of California San Diego, La Jolla, CA 92093, USA
| | - Pedro Cabrales
- Department of Engineering, University of California San Diego, La Jolla, CA 92093, USA
| | - Jin Young Huh
- Department of Medicine, Division of Endocrinology and Metabolism, University of California San Diego, La Jolla, CA 92093, USA
| | - Guatam K. Bandyopadhyay
- Department of Medicine, Division of Endocrinology and Metabolism, University of California San Diego, La Jolla, CA 92093, USA
| | | | - Anne N. Murphy
- Department of Pharmacology, University of California San Diego, La Jolla, CA 92093, USA
| | - Scott C. Beeman
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Gordon I. Smith
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Samuel Klein
- Department of Medicine, Division of Endocrinology and Metabolism, University of California San Diego, La Jolla, CA 92093, USA
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Yun Sok Lee
- Department of Medicine, Division of Endocrinology and Metabolism, University of California San Diego, La Jolla, CA 92093, USA
- Correspondence should be addressed to Y.S.L. () or J.M.O. ()
| | - Jerrold M. Olefsky
- Department of Medicine, Division of Endocrinology and Metabolism, University of California San Diego, La Jolla, CA 92093, USA
- Correspondence should be addressed to Y.S.L. () or J.M.O. ()
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