G-protein coupled receptor 183 also known as Epstein-Barr virus-induced G-protein coupled receptor 2 (EBI2) is a protein (GPCR) expressed on the surface of some immune cells, namely B cells and T cells; in humans it is encoded by the GPR183gene.[5] Expression of EBI2 is one critical mediator of immune cell localization within lymph nodes, responsible in part for the coordination of B cell, T cell, and dendritic cell movement and interaction following antigen exposure.[6][7][8][9] EBI2 is a receptor for oxysterols.[10][11] The most potent activator is 7α,25-dihydroxycholesterol (7α,25-OHC), with other oxysterols exhibiting varying affinities for the receptor.[8][7] Oxysterol gradients drive chemotaxis, attracting the EBI2-expressing cells to locations of high ligand concentration.[6][7][8][9] The GPR183 gene was identified due to its upregulation during Epstein-Barr virus infection of the Burkitt's lymphoma cell line BL41, hence its name: EBI2.[12]
^ abBarington L, Wanke F, Niss Arfelt K, Holst PJ, Kurschus FC, Rosenkilde MM (August 2018). "EBI2 in splenic and local immune responses and in autoimmunity". Journal of Leukocyte Biology. 104 (2): 313–322. doi:10.1002/JLB.2VMR1217-510R. PMID29741800. S2CID13699151.
^ abcKurschus FC, Wanke F (October 2018). "EBI2 - Sensor for dihydroxycholesterol gradients in neuroinflammation". Biochimie. "Current trends in oxysterols and related sterols". 153: 52–55. doi:10.1016/j.biochi.2018.04.014. PMID29689289. S2CID13855522.
^ abcGatto D, Brink R (July 2013). "B cell localization: regulation by EBI2 and its oxysterol ligand". Trends in Immunology. 34 (7): 336–341. doi:10.1016/j.it.2013.01.007. PMID23481574.