The lack of a significant difference in the plasma levels of miR-6867-5p between the patient and control groups together with the presence of a significant negative association between miR-6867-5p and IL-17A in the patient group suggests that miR-6867-5p may directly regulate the IL-17A mRNA rather than the activity of Treg cells in patients with psoriasis. Here, IL17A is linked to psoriasis.