Regulatory T lymphocyte cell population in intestine (Treg cell (intestinal), Foxp3+ Treg cell)

Regulatory T lymphocytes in the intestine—commonly called intestinal regulatory T cells or gut-resident Foxp3+ regulatory T cells—are a specialized subpopulation of CD4+ helper lymphocytes that play essential roles in maintaining immune homeostasis within the gastrointestinal tract. They actively suppress inappropriate immune responses against harmless dietary antigens and commensal microorganisms while also contributing non-immunological functions such as promoting tissue repair and preserving epithelial barrier integrity. Key mechanisms include secretion of anti-inflammatory cytokines like interleukin‑10, expression of CTLA‑4 which inhibits co-stimulation on effector cells, suppression of Th17-mediated inflammation via RORγt-expressing subsets, and adaptation to local microenvironmental cues including signals from diet and microbiota. Dysfunction or deficiency in these populations leads directly to intestinal inflammation such as colitis and contributes significantly to diseases like inflammatory bowel disease.[1][2][3][4]

Other names

Intestinal regulatory T cellGut-resident regulatory T lymphocyteFoxp3+ regulatory T cell (intestinal)Intestinal TregSuppressor T lymphocyte (historical)