ALDH2 and hepatocellular carcinoma: As shown in Fig. 5e-f, compared with normal controls, the SLC27A5, ALDH2, and DCXR genes were lowly expressed (P < 0.0001), while SNRPA (P < 0.0001), SNRPD2 (P < 0.0001), LAMTOR4 (P = 0.003), ROMO1 (P = 0.012) genes were highly expressed, in overall HCC tissues.