There was no difference in the protein expression of MMP2 between the control samples (161.08 ± 16.48) ou/μm2, non-affected tissues 166.69 ± 20.39 ou/μm2, and psoriasis plaques 149.33 ± 23.22 ou/μm2 (Fig. 6B). Here, MMP2 is linked to psoriasis.