Lineage analysis of human papillomavirus type 18 based on E6 region in cervical samples of Iranian women |
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| Authors: | Zahra Salavatiha Zabihollah Shoja Nasrin Heydari Sayed Mahdid Marashi Sarang Younesi Zohreh Nozarian Somayeh Jalilvand |
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| Affiliation: | 1. Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran;2. Department of Virology, Pasteur Institute of Iran, Tehran, Iran;3. Department of Clinical Laboratory Sciences, Nilou Medical Laboratory, Tehran, Iran;4. Department of Pathology, Farabi Hospital, Tehran University of Medical Sciences, Tehran, Iran |
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| Abstract: | Distinct human papillomavirus (HPV) 18 variants are thought to differ in oncogenic potential and geographic distribution. As such, understanding the regional variants of HPV 18 would be of great importance for evolutionary, epidemiological, and biological analysis. In this regard, the sequence variations of E6 gene were investigated to characterize more common variants of HPV 18 in normal cells, premalignant, and malignant samples collected from the cervix. In total, 99 samples of HPV 18 were analyzed by polymerase chain reaction and sequencing. In overall, lineages A was identified in all study subjects, among which sublineage A4 was dominant although the difference observed was not statistically significant with regard to different stages of disease. Sublineage A4 comprised 90.9% of samples and the remaining were belonged to sublineages A1, A2, A3, and A5 at the frequency of 6.1%, 1%, 1%, and 1%, respectively. In conclusion, our findings clearly highlight the sublineage A4 of HPV 18 as the most dominant variant in Iran. |
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| Keywords: | cervical cancer HPV 18 human papillomavirus lineage |
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