The expression of GITRL in salivary gland duct epithelial cells was evaluated to contribute greatly to the pathogenesis of Sjögren’s syndrome-like autoimmune sialadenitis in MRL-Faslpr mice (54).The serum GITRL was demonstrated to positively correlate with the degree of lymphocytic infiltration in pSS patients (55). Here, TNFSF18 is linked to Sjogren syndrome.