Adipose-Resident Group 1 Innate Lymphoid Cells Promote Obesity-Associated Insulin Resistance

Timothy E. O'Sullivan, Moritz Rapp, Xiying Fan, Orr El Weizman, Priya Bhardwaj, Nicholas M. Adams, Thierry Walzer, Andrew J. Dannenberg, Joseph C. Sun

Research output: Contribution to journalArticle

130 Scopus citations

Abstract

Innate lymphoid cells (ILCs) function to protect epithelial barriers against pathogens and maintain tissue homeostasis in both barrier and non-barrier tissues. Here, utilizing Eomes reporter mice, we identify a subset of adipose group 1 ILC (ILC1) and demonstrate a role for these cells in metabolic disease. Adipose ILC1s were dependent on the transcription factors Nfil3 and T-bet but phenotypically and functionally distinct from adipose mature natural killer (NK) and immature NK cells. Analysis of parabiotic mice revealed that adipose ILC1s maintained long-term tissue residency. Diet-induced obesity drove early production of interleukin (IL)-12 in adipose tissue depots and led to the selective proliferation and accumulation of adipose-resident ILC1s in a manner dependent on the IL-12 receptor and STAT4. ILC1-derived interferon-γ was necessary and sufficient to drive proinflammatory macrophage polarization to promote obesity-associated insulin resistance. Thus, adipose-resident ILC1s contribute to obesity-related pathology in response to dysregulated local proinflammatory cytokine production.

Original languageEnglish (US)
Pages (from-to)428-441
Number of pages14
JournalImmunity
Volume45
Issue number2
DOIs
StatePublished - 2016

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Infectious Diseases

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