Notably, Tor1a+/− striata showing a restoration of RGS9‐2 level (Fig 7B, lanes 4 and 5), indicating a successful infection, also showed a complete rescue of DRD2 level (Fig 7B and D; Tor1a+/+: 1.000 ± 0.038 N = 9, Tor1a+/−: HSV/LV‐RGS9‐2‐injected 1.124 ± 0.153 N = 6; Tor1a+/−: contralateral striatum 0.671 ± 0.079 N = 6; Tor1a+/− injected vs. contralateral: paired t‐test P = 0.0380). This evidence concerns the gene DRD2 and infection.