Microbiota-Induced TNF-like Ligand 1A Drives Group 3 Innate Lymphoid Cell-Mediated Barrier Protection and Intestinal T Cell Activation during Colitis (Immunity)

Inflammatory bowel disease (IBD) results from a dysregulated interaction between the microbiota and a genetically susceptible host. Castellanos et al. show a protective role for microbial induction of the IBD-linked protein TL1A in promoting ILC3 barrier immunity and uncover a pathogenic role for TL1A-induced expression of OX40L on ILC3s in driving chronic T cell colitis.