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© Research
Publication : Mucosal immunology

Metabolic regulation by PPARγ is required for IL-33-mediated activation of ILC2s in lung and adipose tissue.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Mucosal immunology - 26 Oct 2020

Fali T, Aychek T, Ferhat M, Jouzeau JY, Busslinger M, Moulin D, Eberl G,

Link to Pubmed [PMID] – 33106586

Link to DOI [DOI] – 10.1038/s41385-020-00351-w

Mucosal Immunol 2020 Oct; ():

Type 2 innate lymphoid cells (ILC2s) play a critical role early in the response to infection by helminths and in the development of allergic reactions. ILC2s are also involved in the physiologic regulation of adipose tissue and its metabolic response to cold shock. We find that the metabolic sensor peroxisome proliferator-activated receptor gamma (PPARγ) is highly expressed in ILC2s of the lung and adipose tissue and increases responsiveness to IL-33. In turn, activation of ILC2 by IL-33 leads to increased expression of PPARγ, a prerequisite for proliferation and expression of the effector cytokines IL-5 and IL-13. In contrast, pharmacological inhibition of PPARγ leads to decreased expression of CD36 and fatty acid uptake, a necessary source of energy for ILC2s and of potential ligands for PPARγ. As a consequence, treatment of mice with a PPARγ antagonist reduces the severity of an ILC2-dependent acute airway inflammation. Together, our results demonstrate the critical role of the metabolic sensor PPARγ for the functions of ILC2s.

https://pubmed.ncbi.nlm.nih.gov/33106586