Abstract

Genome-wide association studies in ulcerative colitis point to a role for FcγRIIA, a receptor for IgG. Castro-Dopico etal. (2019) find a profound induction of anti-commensal IgG in the colonic mucosa of UC patients and outline a pathway whereby FcγR activation by IgG triggers IL-1β production, type 17 immunity, and the exacerbation of inflammation.

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