Intestinal Regulatory T Cells

Area of Science:

• Immunology
• Gastroenterology
• Microbiology

Background:

• Mucosal surfaces, especially the gut, constantly interact with environmental, dietary, and microbial antigens.
• Regulatory T cells (Tregs) are vital for maintaining intestinal immune homeostasis by regulating responses to self- and non-self-antigens.
• Deficiencies in Treg generation, function, or stability lead to significant intestinal inflammation.

Purpose of the Study:

• To critically review factors promoting Treg-mediated tolerance in the gut.
• To discuss Treg differentiation, specificity, function, and immunophenotype in health and disease.
• To examine Treg dysregulation in human intestinal pathologies and its therapeutic implications.

Main Methods:

• Literature review and critical discussion of current knowledge.
• Compilation of data on Treg mechanisms in intestinal tolerance.
• Analysis of Treg roles in specific human intestinal diseases.

Main Results:

• Tregs are essential for active adaptation in the gut immune system.
• Treg imbalance is a hallmark of intestinal pathologies, leading to chronic immune responses.
• Knowledge of Treg dysregulation informs the development of targeted therapies.

Conclusions:

• Understanding Treg dynamics is key to maintaining gut health.
• Dysregulated Tregs are implicated in inflammatory bowel disease (IBD), necrotizing enterocolitis (NEC), graft-versus-host disease (GVHD), and colorectal cancer (CRC).
• Targeting Tregs offers promising therapeutic avenues for intestinal disorders.