SLC2A4 and nasopharyngeal carcinoma: However, other astrocyte genes (Slc7a10, Myoc, Fam107a, Gjb6, Slc1a2, Aqp4, Aldh1a1, Slc2a4, S100b, Atp1a2), were not expressed by astroglia differentiated from NPC at in vivo astrocyte levels but were generally increased compared to NPC.