Gut-associated immune cells (GAICs) (GAICs)

Gut-associated immune cells (GAICs) represent a diverse population of leukocytes residing within the gut-associated lymphoid tissue (GALT), including the lamina propria and intestinal epithelium [1.3.1, 1.4.2]. These cells, which include T cells, B cells, macrophages, and dendritic cells, play a critical role in maintaining immune homeostasis by balancing immune tolerance toward commensal microbes and food antigens with robust defense against pathogens [1.1.2, 1.3.3]. In diseases like inflammatory bowel disease (IBD) and food allergies, dysregulation of these cells leads to chronic inflammation and tissue damage [1.1.4, 1.5.1]. Therapeutic strategies often target specific receptors or pathways within these cells, such as the integrin α4β7 to block lymphocyte trafficking or cytokine signaling pathways (e.g., TNF-α, JAK/STAT) to dampen inflammatory responses [1.2.3, 1.3.2]. Additionally, the gut microbiota significantly influences the maturation and function of GAICs through the production of metabolites like short-chain fatty acids (SCFAs), which are being explored for their immunomodulatory potential [1.3.4, 1.4.1].

Other names

GALT cellsIntestinal immune cellsMucosal immune cellsLamina propria lymphocytesIntraepithelial lymphocytesGut-associated lymphoid tissue cells

Inhibition of lymphocyte trafficking via integrin blockade; Neutralization of pro-inflammatory cytokines (e.g., TNF-alpha, IL-12, IL-23); Inhibition of JAK-STAT signaling; Modulation of immune tolerance via microbial metabolites.