Browsing by Author "Ding, Shan"

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    Identification of The Distinctive Type i/XhoI plus Strain of Epstein-Barr Virus in Gastric Carcinoma in Peru
    (INT INST ANTICANCER RESEARCH, 2011) Ordonez, Paula; Koriyama, Chihaya; Ding, Shan; Yoshiwara, Elena; Corvalan, Alejandro H.; Takano, Juan; Chirinos, Jesus L.; Watanabe, Jose; Miyagui, Juan; Hidalgo, Heriberto; Chacon, Pedro; Linares, Victor; Eizuru, Yoshito; Akiba, Suminori
    Aim: To clarify the reason for the low frequency of Epstein-Barr virus-associated gastric carcinoma (EBVaGC) in Peru, despite the high frequency reported in neighboring countries, the distribution of the distinctive EBV (type i/XhoI+) strain in EBVaGC and a healthy population was examined. Materials and Methods: EBV polymorphisms in BamHI W1/I1 and XhoI restriction site of the latent membrane protein 1 gene (LMP1) were examined among 11 EBVaGCs and 172 healthy controls from Peru, and these frequencies were compared with those in a previous study of Chile and Colombia (n=303). Results: The frequency of the distinctive EBV strain in EBVaGCs (55%) was significantly higher than that in controls (7%). Furthermore, the frequency of this EBV type in Peruvian controls was significantly lower than that in controls from Chile and Colombia (27%, p<0.001). Conclusion: The low frequency of the distinctive EBV strain among the Peruvian population might be a reason for the lower incidence of EBVaGC in Peru, as compared with neighboring countries.