Immune system cells in the gastrointestinal tract

Immune system cells in the gastrointestinal tract" is not a specific molecular target, but rather refers to a diverse group of immune cell populations residing within the gut. These include T lymphocytes (such as regulatory T cells, helper T cell subsets), B lymphocytes, dendritic cells, macrophages, innate lymphoid cells (ILCs), and specialized epithelial-associated populations like intraepithelial lymphocytes and M-cells. Collectively organized as part of the gut-associated lymphoid tissue (GALT), these immune cells are essential for maintaining mucosal immunity—balancing defense against pathogens with tolerance to food antigens and commensal microbes. They play critical roles in regulating inflammation, promoting tissue repair/regeneration via cytokine signaling with intestinal stem cells, orchestrating antigen presentation through Peyer's patches and lamina propria networks, producing secretory IgA for barrier protection, and modulating responses implicated in diseases such as inflammatory bowel disease or gastrointestinal infections. Because this entry describes an entire class of cellular actors rather than a discrete molecular entity or druggable target such as a receptor or enzyme subunit, it is not considered an appropriate therapeutic target entry under standard conventions.

Other names

Gut immune cellsGastrointestinal immune cellsMucosal immune cells in GI tractGALT (Gut-associated lymphoid tissue) components