Journal
JOURNAL OF IMMUNOLOGY
Volume 206, Issue 7, Pages 1409-1417Publisher
AMER ASSOC IMMUNOLOGISTS
DOI: 10.4049/jimmunol.2000812
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Funding
- Jefferies Laboratory through The Sullivan Urology Foundation, Mitacs Accelerate Grant [IT12482]
- Canadian Institutes of Health Research
- Mitacs Accelerate Fellowship in the Jefferies Laboratory at the University of British Columbia
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ILC2s are a type of innate immune cells that play a role in expelling parasites and inducing allergic inflammation. Their unique properties and functions have been the subject of increasing research interest and have led to discoveries that were previously considered unthinkable.
Group 2 innate lymphoid cells (ILC2s) are a set of effectors that mediate the expulsion of helminthic parasites but also drive allergic lung inflammation. As innate agents, they do not recognize Ag, instead, they are sensitive to alarmin engagement, upon which they produce type 2 cytokines that amplify adaptive immunity. Their lymphoid identity appoints them as an intriguing group of unconventional cells; however, increasing evidence is unraveling a series of unprecedented functions that,5 years ago were unthinkable for ILC2s, such as acquiring a proinflammatory identity that enables them to support TH1 immune responses. Their plastic nature has allowed the characterization of ILC2s in more detail than ever; however, the novelty of ILC2 biology requires constant updates and recapitulations. This review provides an overview of ILC2s and describes memory ILC2, regulatory ILC2, inflammatory ILC2, and type 1 ILC2 subsets based on activation status, tissue environments, and function.
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