The expression of chemokines and their receptors are regulated by psoriasis-associated cytokines, including IL-17 which upregulates CCL2, CCL7, CCL20, and CXCL1, or IFN-γ which upregulates CXCL9 and CXCL10 [113, 124]. The gene discussed is CXCL9; the disease is psoriasis.