Epithelial-myeloid exchange of MHC class II constrains immunity and microbiota composition
W. Zac Stephens, Jason L. Kubinak, Arevik Ghazaryan, Kaylyn M. Bauer, Rickesha Bell, Kate Buhrke, Tyson R. Chiaro, Allison M. Weis, William W. Tang, Josh K. Monts, Ray Soto, H. Atakan Ekiz, Ryan M. O’Connell, June L. Round
Abstract
) are healthy but have fewer microbial-bound IgA, regulatory T cells (Tregs), and immune repertoire selection. This was associated with increased interindividual microbiota variation and altered proportions of two taxa in the ileum where MHC class II on IECs is highest. Intestinal mononuclear phagocytes (MNPs) have similar MHC class II transcription but less surface MHC class II and are capable of acquiring MHC class II from IECs. Thus, epithelial-myeloid interactions mediate development of adaptive responses to microbial antigens within the gastrointestinal tract.