Conversely, two traits showed protective connections with psoriasis: CD45 on Gr MDSC (IVW: OR 0.9994, 95% CI 0.9988–0.9999; p = 1.938298e−02), and HLA-DR on CD33−HLA-DR+ (IVW: OR 0.9992, 95% CI 0.9985–0.9999; p = 1.905693e−02). This evidence concerns the gene PTPRC and psoriasis.