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Objective  A hot genetic variant, rs641738 within the  membrane-bound O-acyltransferase domain containing 7(MBOAT7)  and  transmembrane channel-like 4 (TMC4) , was recently reported to be associated with several liver diseases. However, the results remain controversial. Therefore, this study aimed to explore the role of  MBOAT7-TMC4  rs641738 in the risk of hepatocellular carcinoma (HCC) and persistent hepatitis B virus (HBV) infection.    Methods  We first conducted a case-control study that included 779 HCC cases and 1412 cancer-free controls. Controls consisted of 678 persistent HBV carriers and 734 spontaneously recovered subjects. The gene variant rs641738 was genotyped using the MassARRAY platform. The results were analyzed in five genetic models using multivariate logistic regression analyses. Next, we performed a systematic review and meta-analysis to further explore the role of this variant in HCC risk.    Results  The results suggested no association between  MBOAT7-TMC4  rs641738 and HCC risk in most genetic models (all  P  > 0.05). Although a marginally significant association was observed in TT  vs . CC ( P  = 0.037) and the recessive models ( P  = 0.044). The meta-analysis of 2135 HCC cases and 4388 controls supported that this variant was not related to HCC risk, even in the TT  vs . CC and recessive models. We also determined that this variant did not influence persistent HBV infection.    Conclusion  Our work highlights that  MBOAT7-TMC4  rs641738 is not associated with the risk of HCC or persistent HBV infection. This study provides some clues to identify the “truth” of potential disease-related genetic factors in the post-genome era.

MBOAT7-TMC4 rs641738 Is Not Associated With the Risk of Hepatocellular Carcinoma or Persistent Hepatitis B Infection