1887

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Volume 89, Issue 7

Influence of human papillomavirus type 16 (HPV-16) E2 polymorphism on quantification of HPV-16 episomal and integrated DNA in cervicovaginal lavages from women with cervical intraepithelial neoplasia Free

Abstract

Integrated human papillomavirus type 16 (HPV-16) viral loads are currently estimated by quantification with real-time PCR of HPV-16 E6 (RT-E6 and HPV-16 PG) and E2 (RT-E2-1) DNA. We assessed the influence of HPV-16 E2 polymorphism on quantification of integrated HPV-16 DNA in anogenital specimens. HPV-16 E2 was sequenced from 135 isolates (123 from European and 12 from non-European lineages). An assay targeting conserved HPV-16 E2 sequences (RT-E2-2) was optimized and applied with RT-E6 and RT-E2-1 on 139 HPV-16-positive cervicovaginal lavages collected from 74 women [58 human immunodeficiency virus (HIV)-seropositive and 16 HIV-seronegative]. Ratios of HPV-16 copies measured with RT-E2-2 and RT-E2-1 obtained with African 2 (median=3.23, range=1.92–3.49) or Asian–American (median=3.78, range=1.47–37) isolates were greater than those obtained with European isolates (median=1.02, range=0.64–1.80; <0.02 for each comparison). The distribution of HPV-16 E2 copies measured in 139 samples with RT-E2-2 (median=6150) and RT-E2-1 (median=8960) were different (<0.0001). The risk of high-grade cervical intraepithelial neoplasia (CIN-2,3) compared with women without CIN was increased with higher HPV-16 total [odds ratio (OR)=2.17, 95 % confidence interval (CI)=1.11–4.23], episomal (OR=2.14, 95 % CI=1.09–4.19), but not for HPV-16 integrated viral load (OR=1.71, 95 % CI=0.90–3.26), after controlling for age, race, CD4 count, HIV and HPV-16 polymorphism. The proportion of samples with an E6/E2 ratio >2 in women without squamous intraepithelial lesion (7 of 35) was similar to that of women with CIN-2,3 (5 of 11, =0.24) or CIN-1 (5 of 14, =0.50). HPV-16 E2 polymorphism was a significant factor that influenced measures of HPV-16 integrated viral load.

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2008-07-01
2024-04-27
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Influence of human papillomavirus type 16 (HPV-16) E2 polymorphism on quantification of HPV-16 episomal and integrated DNA in cervicovaginal lavages from women with cervical intraepithelial neoplasia
J. Gen. Virol. 89, 1716 (2008); https://doi.org/10.1099/vir.0.83579-0
/content/journal/jgv/10.1099/vir.0.83579-0
/content/journal/jgv/10.1099/vir.0.83579-0
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