IFNG and systemic lupus erythematosus: Systemic lupus erythematosus (SLE) is a multisystem inflammatory and autoimmune disease.Despite the etiology of SLE has not been fully understood, the abnormal lymphocyteapoptosis, decreased clearance of activated T cells and involvement of multiplecytokines including IFN-γ [1], interleukin (IL)-10 [1] and IL-6 [2] have been demonstrated with the pathogenesis of SLE [3-5].