In the hippocampus, differently from the frontal cortex, the expression levels of Nrg1 (p = 0.007) and Erbb4 (p ≤ 0.0001) in HCC 129Sv mice were significantly elevated compared to the respective Bl6 group (Figure 11B,F). The gene discussed is ERBB4; the disease is hepatocellular carcinoma.