FLI1 and post-traumatic stress disorder: Interestingly, IL-6 secretion was significantly elevated in HMC3 cells co-cultured with LPS-stimulated PBMCs from PTSD patients; this increase was inhibited by knockdown of FLI1 via FLI1 Gapmer (n=4 per group from three independent experiments, Figure 3A; p < 0.05).