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Obesity Expands a Distinct Population of T Cells in Adipose Tissue and Increases Vulnerability to Infection.

Cell reports | 2019

Obesity in humans is associated with poorer health outcomes after infections compared with non-obese individuals. Here, we examined the effects of white adipose tissue and obesity on T cell responses to viral infection in mice. We show that lymphocytic choriomeningitis virus (LCMV) grows to high titer in adipose tissue. Virus-specific T cells enter the adipose tissue to resolve infection but then remain as a memory population distinct from memory T cells in lymphoid tissues. Memory T cells in adipose tissue are abundant in lean mice, and diet-induced obesity further increases memory T cell number in adipose tissue and spleen. Upon re-challenge infection, memory T cells rapidly cause severe pathogenesis, leading to increases in lipase levels, calcification of adipose tissue, pancreatitis, and reduced survival in obese mice but not lean mice. Thus, obesity leads to a unique form of viral pathogenesis involving memory T cell-dependent adipocyte destruction and damage to other tissues.

Pubmed ID: 30970254 RIS Download

Antibodies used in this publication

Associated grants

  • Agency: NCI NIH HHS, United States
    Id: P30 CA016086
  • Agency: NIAID NIH HHS, United States
    Id: R56 AI110682
  • Agency: NIAID NIH HHS, United States
    Id: R01 AI138337
  • Agency: NIDDK NIH HHS, United States
    Id: P30 DK056350
  • Agency: NIAID NIH HHS, United States
    Id: R21 AI117575

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