Then we took the intersection between Co-DEGs and PRGs, and obtained 16 PDGs in psoriasis (Fig. 2E), namely, AIM2, AXL, BAK1, CASP1, CASP4, CASP5, CASP7, CDK1, CFLAR, GPX4, GZMA, GZMB, IL18, IRF1, PYCARD, and TP63. Here, IL18 is linked to psoriasis.