Cell surface transmembrane glycoprotein CD200 receptor 1 is a protein that in humans is encoded by the CD200R1 gene. [5] [6] [7] CD200R1 is expressed on the surface of myeloid cells [8] and CD4+ T cells. [9] It interacts with CD200 transmembrane glycoprotein that can be expressed on variety of cells including neurons, [10] epithelial cells, [11] endothelial cells, [12] fibroblasts, [13] and lymphoid cells. [14]
CD200R1 activation regulates the expression of pro-inflammatory molecules such as tumor necrosis factor (TNF-alpha), [15] interferons, and inducible nitric oxide synthase (iNOS). [16]
This gene encodes a receptor for the OX-2 membrane glycoprotein. Both the receptor and substrate are cell surface glycoproteins containing two immunoglobulin-like domains. This receptor is restricted to the surfaces of myeloid lineage cells and the receptor-substrate interaction may function as a myeloid downregulatory signal. Mouse studies of a related gene suggest that this interaction may control myeloid function in a tissue-specific manner. Alternative splicing of this gene results in multiple transcript variants. [7]
This article incorporates text from the United States National Library of Medicine, which is in the public domain.