IL17A and myeloid sarcoma: The reports have shown that miR-21, let-7e, and miR-155 stimulate Th1 and Th17 development, miRNA-21 rises the of IFN-γ and IL-17 expression, miR-146a upregulates IL-17 expression, miRN-326 helps Th17 development, and miR-142-3p prevents IL-10 expression, which help to MS pathogenesis (Arora et al. 2013).