A method of treating
systemic lupus erythematosus (SLE) in a subject are provided. The method comprise altering in cells of the subject activity and / or expression of at least one
gene selected from the group consisting of Mpo, Ltf, Lcn, Camp, Ngp, Slfn, Ctsg, Thbs1, S100a8, 1190003K14Rik, Prtn3, S100a9, Tfpi, Fzd6, Nid1, 5830484A20Rik, 5830484A20 LOC 545340, Tnfsf4, IPstpip2, Pigr, 270022B06Rik, L5R-alpha, A130040M12Rik, Gpr132, Cd8b1, Dhx9, Cyp11a1, Lmo7, Rnf184, Pstpip2, Hdgfrp3, Ass1 and Zbtb20, thereby treating SLE. Also provided are methods of diagnosing SLE and monitoring treatment of SLE.