CD200R is an inhibitory receptor expressed on myeloid cells and some lymphoid cells and plays important roles in negatively regulating immune responses. and cytolytic activity by activated IELs. Thus iSEC1 is a previously unappreciated CD200R ligand with restricted expression in gastrointestinal secretory cells and may negatively regulate mucosal immune responses. Paired receptors are closely related… Continue reading CD200R is an inhibitory receptor expressed on myeloid cells and some