TSPO and post-traumatic stress disorder: TSPO expression was non-significantly lower in prefrontal cortex BA11 (−1.66-fold lower (±0.16), p = 0.07) and in BA25 (1.02-fold lower (±0.08), p = 0.33) in tissue from individuals with PTSD (n = 22) relative to non-PTSD controls (n = 22) (Fig. 4a).