IFNG and post-traumatic stress disorder: Similarly, co-culture with LPS-stimulated PBMCs from control subjects led to a moderate increased in IFNγ production by HMC3 cells, whereas co-culture with LPS-stimulated PBMCs from PTSD subjects led to a significant increase in IFNγ production (n=4 per group from three independent experiments, Figure 3B; p < 0.05).