TSPO and post-traumatic stress disorder: In females with PTSD (n = 11), TSPO expression was significantly lower relative to female controls (n = 11) in BA11 (−2.30-fold lower (±0.10), p = 0.01) but did not reach significance in BA25 (−1.40-fold lower (±0.06), p = 0.08) (Fig. 4a).