IL17A and post-traumatic stress disorder: Many microRNAs upregulated in PTSD. Also in PTSD groups, downregulation of miR-125a (as well as miR-181c); inhibitory effect of miR-125a on IFN-γ release in vitro. Interferon gamma (IFN-γ) and IL-17 were also found in the plasma. Significant increase of peripheral blood mononuclear cell numbers in PTSD patients vs. controls, which also correlated with anxiety. Supports immune dysregulation in PTSD.