Tumor necrosis factor-like cytokine 1A plays a role in inflammatory bowel disease pathogenesis

Proc Natl Acad Sci U S A. 2023 Aug 22;120(34):e2120771120. doi: 10.1073/pnas.2120771120. Epub 2023 Aug 14.

Abstract

The binding of tumor necrosis factor-like cytokine 1A (TL1A) to death receptor 3 (DR3) plays an important role in the interaction between dendritic cells (DCs) and T cells and contributes to intestinal inflammation development. However, the mechanism by which DCs expressing TL1A mediate helper T (Th) cell differentiation in the intestinal lamina propria (LP) during the pathogenesis of inflammatory bowel disease remains unclear. In this study, we found that TL1A/DR3 promoted Th1 and Th17 cell differentiation in T-T and DC-T cell interaction-dependent manners. TL1A-deficient CD4+ T cells failed to polarize into Th1/Th17 cells and did not cause colonic inflammation in a T cell transfer colitis model. Notably, TL1A was located in the cytoplasm and nuclei of DCs, positively regulated the DC-specific ICAM-grabbing nonintegrin/RAF1/nuclear factor κB signaling pathway, enhanced the antigen uptake ability of DCs, and promoted TLR4-mediated DC activation, inducing naive CD4+ T cell differentiation into Th1 and Th17 cells. Our work reveals that TL1A plays a regulatory role in inflammatory bowel disease pathogenesis.

Keywords: TL1A; dendritic cell; inflammatory bowel disease.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Humans
  • Inflammation / metabolism
  • Inflammatory Bowel Diseases* / metabolism
  • Receptors, Tumor Necrosis Factor, Member 25 / metabolism
  • Tumor Necrosis Factor Ligand Superfamily Member 15* / genetics
  • Tumor Necrosis Factor Ligand Superfamily Member 15* / metabolism
  • Tumor Necrosis Factor-alpha

Substances

  • Tumor Necrosis Factor Ligand Superfamily Member 15
  • Receptors, Tumor Necrosis Factor, Member 25
  • Tumor Necrosis Factor-alpha