Enzymatic Activity of HPGD in Treg Cells Suppresses Tconv Cells to Maintain Adipose Tissue Homeostasis and Prevent Metabolic Dysfunction Academic Article uri icon

Overview

MeSH Major

  • Adiponectin
  • Adipose Tissue, White
  • Aromatase
  • Breast
  • C-Reactive Protein
  • Interleukin-6
  • Leptin
  • Menopause

abstract

  • © 2019 Elsevier Inc. Regulatory T cells (Treg cells)are important for preventing autoimmunity and maintaining tissue homeostasis, but whether Treg cells can adopt tissue- or immune-context-specific suppressive mechanisms is unclear. Here, we found that the enzyme hydroxyprostaglandin dehydrogenase (HPGD), which catabolizes prostaglandin E 2 (PGE 2 )into the metabolite 15-keto PGE 2 , was highly expressed in Treg cells, particularly those in visceral adipose tissue (VAT). Nuclear receptor peroxisome proliferator-activated receptor-γ (PPARγ)-induced HPGD expression in VAT Treg cells, and consequential Treg-cell-mediated generation of 15-keto PGE 2 suppressed conventional T cell activation and proliferation. Conditional deletion of Hpgd in mouse Treg cells resulted in the accumulation of functionally impaired Treg cells specifically in VAT, causing local inflammation and systemic insulin resistance. Consistent with this mechanism, humans with type 2 diabetes showed decreased HPGD expression in Treg cells. These data indicate that HPGD-mediated suppression is a tissue- and context-dependent suppressive mechanism used by Treg cells to maintain adipose tissue homeostasis.

authors

publication date

  • May 21, 2019

Research

keywords

  • Academic Article

Identity

Language

  • eng

Digital Object Identifier (DOI)

  • 10.1016/j.immuni.2019.03.014

PubMed ID

  • 31027998

Additional Document Info

start page

  • 1232

end page

  • 1248.e14

volume

  • 50

number

  • 5