In psoriasis (Ps) and psoriatic arthritis (PsA), bioinformatics analysis revealed that COL6A5 and COL8A1 participate in the altered proliferation and angiogenesis pathways in Ps/PsA, participate in inflammatory response together with miR-146a, and participate in the common and different biological pathways of Ps and PsA (Caputo et al., 2020). Here, COL8A1 is linked to psoriatic arthritis.