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Title: Correlates of anti-EBV EBNA1 IgA positivity among unaffected relatives from nasopharyngeal carcinoma multiplex families.
Authors: Chang CM,  Yu KJ,  Hsu WL,  Major JM,  Chen JY,  Lou PJ,  Liu MY,  Diehl SR,  Goldstein AM,  Chen CJ,  Hildesheim A
Journal: Br J Cancer
Date: 2012 Jan 3
Branches: BB, GEB, IIB, NEB
PubMed ID: 22095229
PMC ID: PMC3251852
Abstract: BACKGROUND: To determine whether non-viral nasopharyngeal carcinoma (NPC) risk factors might be associated with (and mediated through) Epstein-Barr virus (EBV) serological responses linked to NPC risk, we evaluated predictors of risk of anti-EBNA1 IgA seropositivity and other markers among unaffected relatives from a large NPC family study in Taiwan. METHODS: Multivariate logistic regression conditioned on family was used to examine the associations between sociodemographic, dietary, lifestyle, and occupational variables and risk of anti-EBV EBNA1 IgA positivity, anti-VCA IgA, and anti-DNase positivity. RESULTS: Among 2393 unaffected relatives from 319 multiplex families, 1180 (49.3%) were anti-EBV EBNA1 IgA seropositive. None of the associations with anti-EBNA1 IgA were statistically significant, except for being 31-50 years of age (vs <30, adjusted ORs 0.51-0.57). For one or more EBV serological markers, there were suggestive associations for older age, GuangDong firm salted fish, betel use, current alcohol use, and male gender. CONCLUSION: Overall, we found little evidence to suggest that non-viral NPC risk factors significantly alter EBV serological patterns, suggesting that non-viral NPC risk factors act through pathways independent of EBV serological responses.