Concerning miRNAs, it has been identified that hsa-miR-19a-3p has great potential to become a biomarker for psoriasis because it binds to the mRNA of seven genes (CAST, TSC1, SPATA2, ERAP1, TNIP1, ERBB3 and SDC4) thatare associated with psoriasis [56]. The gene discussed is ERAP1; the disease is psoriasis.