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Medicina is published by MDPI from Volume 54 Issue 1 (2018). Articles in this Issue were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence. Articles are hosted by MDPI on mdpi.com as a courtesy and upon agreement with Lithuanian Medical Association, Lithuanian University of Health Sciences, and Vilnius University.
Open AccessArticle

Distribution of human papillomavirus type 16 variants in Lithuanian women with cervical cancer

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National Cancer Institute, Vilnius, Lithuania
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Faculty of Medicine, Vilnius University, Vilnius, Lithuania
3
Faculty of Natural Sciences, Vilnius University, Vilnius, Lithuania
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Institute of Biotechnology, Vilnius University, Vilnius, Lithuania
*
Author to whom correspondence should be addressed.
Medicina 2015, 51(6), 328-335; https://doi.org/10.1016/j.medici.2015.11.005
Received: 30 April 2014 / Accepted: 8 November 2015 / Published: 19 November 2015
Background and objective: Cervical cancer usually is caused by HPV 16. However, HPV 16 varies within type; different genotypes are described as prototype or variants. Prevalence of different variants differ according the geographic regions and has an unequal impact for cervical cancer development. Our study aimed to identify which variant of HPV 16 was most prevalent in biological samples taken from Lithuanian women with cervical cancer.
Materials and methods: A total of 122 HPV 16 positive cervical samples (invasive cancer and cervical intraepithelial neoplasia) were investigated and sequenced to identify different variants. HPV 16 was detected using type specific PCR, exact sequence of the virus was obtained by viral DNA sequencing.
Results: Adequate HPV sequence was detected in 106 cases from 122 (86.9% of all cases). After histological confirmation, 96 cases were included in the final analysis. In 33 cases (34.4%) HPV 16 prototype was detected; in 50 cases (52.1%), L83V variant; and in remaining 13 cases (13.5%), multivariant of HPV 16. The frequency of L83V variant in invasive cancer and carcinoma in situ samples was the same (66.7% and 62.0%, respectively; P = 0.696). Of analyzed multivariants, 10 were attributed to the European phylogenetic line; 1, to the North American, and 1, to the Asian-American. One sample was not attributed to any of the known phylogenetic lines.
Conclusions: The European HPV 16 L83V variant is usually associated with high risk of cervical cancer among women. However, statistically significant difference was not achieved when comparing difference of L83V variants between investigated groups and in HPV 16 L83V variant and prototype distribution in CIN3/Ca in situ and cancer.
Keywords: Cervical cancer; Cervical pathology; HPV16 prototype; L83V variant Cervical cancer; Cervical pathology; HPV16 prototype; L83V variant
MDPI and ACS Style

Gudlevičienė, Ž.; Stumbrytė, A.; Juknė, G.; Simanavičienė, V.; Žvirblienė, A. Distribution of human papillomavirus type 16 variants in Lithuanian women with cervical cancer. Medicina 2015, 51, 328-335.

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