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2004 OCT 7 - (NewsRx.com & NewsRx.net) -- A study from Italy found non-European variants of human papillomavirus type 16 occurred more frequently in invasive cervical cancer lesions than European variants.
"Human papillomavirus type 16 (HPV-16) classes (E, AA, As, AM Af2) and their variants have different geographic distribution and different degrees of association with cervical lesions. This study was designed to examine HPV-16 variants among Italian women and their prevalence in case patients (affected by invasive cervical carcinoma or cervical intraepithelial neoplasia grade 2-3 and cervical intraepithelial neoplasia grade 1), versus control subjects with normal cervical epithelium (controls)," reported M.L. Tornesello and colleagues.
They tested "90 HPV-16 positive cervical samples from women of Italian Caucasian descent ..., including 36 invasive cervical carcinomas, 21 with cervical intraepithelial neoplasias grade 2-3, 17 with cervical intraepithelial neoplasia grade 1, and 16 controls."
According to the researchers' report, "HPV-16 was detected with an E6/E7 gene-specific polymerase chain reaction, and variant HPV-16 classes and subclasses were identified by direct nucleotide sequencing of the region coding for the E6 and the E7 oncoproteins, the MY09/11-amplified highly conserved L1 region, and the long control region (LCR).
"Among the 90 HPV-16 samples, nine viral variants have been identified belonging to the European (Ep-T350 and E-G350) and non-European (AA and Af-1) branches," the authors said.
Tornesello and team reported, "The E-G350 is the prevalent variant in all analyzed different disease stages being present in 55.5% of ICC, 52.4% of cervical intraepithelial neoplasias 2-3, 47.1% of cervical intraepithelial neoplasia grade 1, and 50.0% of ...
Source: HighBeam Research, Non-European HPV type 16 variants more frequent in invasive disease.