Expression quantitative trait loci for PVT1 contributes to the prognosis of hepatocellular carcinoma

Abstract

Aim: Plasmacytoma variant translocation 1 (PVT1), a long intergenic non-coding RNA, was overexpressed in liver cancer. A single nucleotide polymorphism (SNP) rs4733586 was identified as an expression quantitative trait loci (eQTL) for PVT1 using bioinformatics analysis. This study was to assess the association of PVT1 eQTL with hepatocellular carcinoma (HCC) prognosis.

Methods: A case-only study was performed to assess the association between SNP and HCC overall survival in 331 HCC patients with hepatitis B virus. Cox proportional hazard regression models were conducted for survival analysis with adjustment for age, gender, smoking status, drinking status, Barcelona-Clinic Liver Cancer stages, and chemotherapy or transcatheter hepatic arterial chemoembolization (TACE) status.

Results: The variant genotype C allele of rs4733586 was significantly associated with a higher death risk compared with T allele (adjusted hazard ratio = 1.26, 95% confidence intervals = 1.05-1.51, P = 0.012 in the additive model). By stepwise Cox proportional hazard analysis, four variables (age, drinking status, chemotherapy or TACE status, PVT1 eQTL) were remained in the final regression model. In the stratified analysis, no heterogeneity was observed among different subgroups.

Conclusion: These findings suggest that eQTL SNP for PVT1 may be susceptibility marker for the HCC overall survival.

Keywords

Plasmacytoma variant translocation 1 / expression quantitative trait loci / long non-coding RNA / hepatocellular carcinoma / survival

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