Abstract
Aim: To investigate the correlation between Epstein–Barr virus (EBV) variants and EBV-associated gastric cancer (EBVaGC) in Iran. Materials & methods: Biopsies from 21 gastric cancer (4 positive EBER-ISH [EBVaGC] and 17 negative EBER-ISH) and 11 gastritis patients were analyzed using nested PCR and sequencing. Results: Genotype 1 (75%) was the predominant EBV genotype. The P-thr variant was the most common in all groups (positive EBER-ISH 75%, negative EBER-ISH 76.4%, and gastritis 81.8%), followed by P-ala. Additionally, the predominant LMP1 strain in all groups was Med. Sequencing analysis revealed a strong correlation between the P-thr and type 1. Conclusion: Since no preferential correlations were observed between distinct EBV variants and the study groups, these results might indicate geographic polymorphisms.
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