Prevalence of Human Papillomavirus Types and Phylogenetic Analysis of HPV-16 L1 Variants from Southern India

Kabekkodu, Shama Prasada and Bhat, Samatha and Pandey, Deeksha and Varghese, Vinay Koshy and Shukla, Vaibhav and Ghosh, Supriti and Kushtagi, Pralhad and Gopinath, Puthiya Mundayat and Satyamoorthy, K (2015) Prevalence of Human Papillomavirus Types and Phylogenetic Analysis of HPV-16 L1 Variants from Southern India. Asian Pacific Journal of Cancer Prevention, 16 (5). 2073-2080. ISSN 1513-7368

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Background: The human papillomavirus (HPV) and its variants show wide geographical distribution and have been reported to cause cervical lesions. With cervical neoplasia as the leading cancer in Indian women, the aim of the present study was to evaluate the multiple infection HPV type distribution and variant genotypes in cervical samples from the coastal Karnataka region, India. Materials and Methods: A total of 212 samples were screened by nested polymerase chain reaction using PGMY9/11 and GP5+/6+ primers. HPV positive samples were sequenced to identify the types and a phylogenetic tree was constructed using the neighbor-joining method. Results: Sequence analysis identified a total of 14 HPV types distributed in 20%, 73.3% and 82.5% of non-malignant, pre-malignant [low grade squamous intraepithelial lesion (LSIL) and high grade squamous intraepithelial lesion (HSIL)] and cervical cancer samples. The distribution of high risk HPV in cancer samples was HPV 16, 76.4%, HPV18, 11.7%, HPV81, 2.9%, HPV31, 1.4%, HPV35, 1.4% and HPV 45, 1.4%. Multiple infections were observed in 11.8% of tumor samples with HPV 16 contributing to 62.5% of cases. In non-malignant samples, 20% of HPV positive samples were detected with HPV16, 82.3%, HPV33, 5.8% and HPV58, 5.8% and very low incidence of multiple infections. Comparative phylogenetic analysis of HPV variants identified 9 HPV sequences as new papillomavirus species, predominantly classified as European lineage type. Conclusions: The findings for HPV infections associated with progression of cervical cancer in coastal Karnataka region and HPV variant analysis provide baseline data for prevention and HPV vaccination programs.

Item Type: Article
Uncontrolled Keywords: Cervical cancer ; human papillomavirus ; multiple infections ; nested PCR ; PGMY9/11 ; GP5+/6+.
Subjects: Life Sciences > MLSC Manipal
Medicine > KMC Manipal > Obstetrics & Gynaecology
Depositing User: KMC Manipal
Date Deposited: 24 Mar 2015 07:31
Last Modified: 24 Mar 2015 07:31

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