CCL2 and systemic lupus erythematosus: Additionally, Wang et al. [12] reported that in a murine model of lupus, pristane-treated wild-type (WT) mice exhibited elevated CXCL1, MCP-1, anti-snRNP and anti-dsDNA levels compared with untreated mice; however, CXCL1, MCP-1 and anti-snRNP levels were reduced in pristane-treated P-selectin glycoprotein ligand-1-deficient (Psgl-1−/−) mice compared to pristane-treated WT mice.