The present invention provides compositions and methods for aiding in the diagnosis, monitoring and prognosis of SLE in a subject and for identifying potential therapeutic agents to treat and/or ameliorate the symptoms associated with SLE. Accordingly, embodiments of the invention are directed to methods of identifying the gene expression profile of a suitable sample by screening for the presence of a differentially expressed SLE-associated gene isolated from a sample containing or suspected of containing a cell that can differentially express an SLE-associated gene.