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Integration Sites and Genotype Distributions of Human Papillomavirus in Cervical Intraepithelial Neoplasia

  • Wang, Li (Qingdao University Medical College) ;
  • Dai, Shu-Zhen (Key Laboratory of Cervical Disease of Qingdao, Department of Obstetrics and Gynecology, Affiliated Hospital of Qingdao University Medical College, Qingdao University) ;
  • Chu, Hui-Jun (Key Laboratory of Cervical Disease of Qingdao, Department of Obstetrics and Gynecology, Affiliated Hospital of Qingdao University Medical College, Qingdao University) ;
  • Cui, Hong-Fei (Qingdao University Medical College) ;
  • Xu, Xiao-Yan (Qingdao University Medical College)
  • Published : 2013.06.30

Abstract

Objectives: To analyse HPV integration prevalence and genotype distributions in cervical intraepithelial neoplasia (CIN) in east part of China, furthermore to assess preferential sites for common HPV integrations and provide baseline information for cervical abnormality screening and prevention. Methods: Integration of HPV in 113 paraffin-embedded cervical intraepithelial neoplasia samples was assessed using Gencap technology in Key Laboratory of Biotechnologies in BGI-Shenzhen. Results: 64 samples were HPV-integrated and as the cervical lesions increased, the integration rate became higher significantly (P=0.002). Fifteen different HPV genotypes were detected, 14 high-risk (16, 18, 31, 33, 51, 52, 56, 58, 66, 68) and 1 low-risk (11). The most common genotypes were HPV-16, 58, 33, 52, 66, and 56. Thirteen patients had co-integration involving mainly HPV-16 and 58. The frequency of HPV gene disruption was higher in L1 and E1 genes than in other regions of the viral genomes. Conclusion: Some 56.6% of CIN lesions in Qingdao had HPV integrations, and 67.2% of HPV-integrated patients were HPV-16 and 58, more prone to be integrated in younger patients below 45 years old. There exist preferential sites for HPV-16 and HPV-58 integration, and they are more likely to be disrupted in the L1 and E1 loci.

Keywords

Cervical intraepithelial neoplasia;HPV;integration;HPV genotype;preferential sites

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