Abstract
Objective: To look for the further evidence for HPV L1 HPV16 E6, HPV 18 E6 and EBV as carcinogenic factors in laryngeal carcinoma. Method: we examined representative numbers of specimens from laryngeal cancer with highly sensitive PCR technique for the presence of HPV L1 and high-risk types HPV16 E6, HPV18 E6 and EBV LMP1. Results: Using PCR detection, 7.3% samples were HPV L1 positive, 52.03% were HPV16 E6 positive, 30.89% were HPV18 E6 positive and 9.13% were EBV LMP1 positive. The low incidence of HPV L1 and high incidence of HPV-16 E6 and HPV18 E6 genes suggest that HPV might be integrated into tumor cells. Our results support a role of HPV-16 and HPV-18 infection in the pathogenesis of laryngeal carcinoma in China. Conclusion: Integration of E6 into host genome and stable expression of these genes may be associated with the carcinogenesis of laryngeal carcinoma. HPV-16 and HPV-18 may synergistically function on the pathogenesis of laryngeal carcinoma. Our results suggest an association of laryngeal carcinogenesis and infection with the high-risk HPV types 16, HPV 18 and EBV.
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