in acquisition of mucosal-homing properties by T and B cells
Development and differentiation of Th 1 and Th2 cells; maintains normal antibody-mediated Th2 response by suppressing IL-12, TNF-α, and IFN-γ production of Th1 cells
Normal functioning of B cells, necessary for generation of antibody responses to antigen; required for B cell-mediated IgA antibody responses to bacterial p