IL17A and psoriasis: A number of studies have also revealed the relationship between microRNAs (miRNAs) and IL-17; miR-125a-3p decreases the level of IL-17 and suppresses renal fibrosis (Zhang et al., 2019), while miR-340 alleviates psoriasis in mice through direct targeting of IL-17 (Bian et al., 2018).