Journal
NATURE
Volume 528, Issue 7580, Pages 137-+Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nature16151
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Funding
- National Institutes of Health (NIH) [F30 DK096828, T32 GM007198]
- National Health and Medical Research Council of Australia [512354, 632886, 1043199]
- NIH [DK057978, DK090962, HL088093, HL105278, ES010337]
- Glenn Foundation for Medical Research
- Leona M. and Harry B. Helmsley Charitable Trust
- Ipsen/Biomeasure
- California Institute for Regenerative Medicine
- Ellison Medical Foundation
- Nomis Foundation
- Rita Allen Foundation
- Emerald Foundation
- Hearst Foundation
- National Multiple Sclerosis Society
- National Institutes of Health [AI099295, AI107027]
- National Cancer Institute [CA014195]
- James B. Pendleton Charitable Trust
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Age-associated insulin resistance (IR) and obesity-associated IR are two physiologically distinct forms of adult-onset diabetes. While macrophage-driven inflammation is a core driver of obesity-associated IR1-6, the underlying mechanisms of the obesity-independent yet highly prevalent age-associated IR7 are largely unexplored. Here we show, using comparative adipo-immune profiling in mice, that fat-resident regulatory T cells, termed fT(reg) cells, accumulate in adipose tissue as a function of age, but not obesity. Supporting the existence of two distinct mechanisms underlying IR, mice deficient in fT(reg) cells are protected against age-associated IR, yet remain susceptible to obesity-associated IR and metabolic disease. By contrast, selective depletion of fT(reg) cells via anti-ST2 antibody treatment increases adipose tissue insulin sensitivity. These findings establish that distinct immune cell populations within adipose tissue underlie ageing- and obesity-associated IR, and implicate fT(reg) cells as adipo-immune drivers and potential therapeutic targets in the treatment of age-associated IR.
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