Host genetic variants, Epstein-Barr virus subtypes, and the risk of nasopharyngeal carcinoma: Assessment of interaction and mediation

Cell Genom. 2024 Feb 14;4(2):100474. doi: 10.1016/j.xgen.2023.100474. Epub 2024 Jan 9.

Abstract

Epstein-Barr virus (EBV) and human leukocyte antigen (HLA) polymorphisms are well-known risk factors for nasopharyngeal carcinoma (NPC). However, the combined effects between HLA and EBV on the risk of NPC are unknown. We applied a causal inference framework to disentangle interaction and mediation effects between two host HLA SNPs, rs2860580 and rs2894207, and EBV variant 163364 with a population-based case-control study in NPC-endemic southern China. We discovered the strong interaction effects between the high-risk EBV subtype and both HLA SNPs on NPC risk (rs2860580, relative excess risk due to interaction [RERI] = 4.08, 95% confidence interval [CI] = 2.03-6.14; rs2894207, RERI = 3.37, 95% CI = 1.59-5.15), accounting for the majority of genetic risk effects. These results indicate that HLA genes and the high-risk EBV have joint effects on NPC risk. Prevention strategies targeting the high-risk EBV subtype would largely reduce NPC risk associated with EBV and host genetic susceptibility.

Keywords: Epstein-Barr virus; HLA polymorphism; causal inference; genetic susceptibility to cancer; interaction; mediation; nasopharyngeal carcinoma.

MeSH terms

  • Case-Control Studies
  • Epstein-Barr Virus Infections* / genetics
  • Herpesvirus 4, Human / genetics
  • Humans
  • Nasopharyngeal Carcinoma / genetics
  • Nasopharyngeal Neoplasms* / epidemiology
  • Polymorphism, Single Nucleotide / genetics