SLC6A4 and post-traumatic stress disorder: In addition, mice exposed to the animal model of PTSD showed reduced Cnr1 (Figure 4A, Student’s t-test, t = 5.647, p < 0.001, 14 d.f.)and increased Cnr2 (Figure 4B, Student’s t-test, t = −3.604, p = 0.003, 14 d.f.)gene expression in the AMY, as well as enhanced gene expression of Slc6a4 (Figure 4C, Student’s t-test, t = −3.337, p = 0.005, 14 d.f.)in the DR compared with non-exposed mice.