title: Human papillomavirus-16 E6 variants in cervical squamous intraepithelial lesions from HIV-negative and HIV-positive women.
abstract: We studied 48 human papillomavirus (HPV)-16-positive squamous intraepithelial lesions (SILs) from HIV-negative patients (16 low-grade SILs [LSILs]; 32 high-grade SILs [HSILs]) and 13 HPV-16-positive SILs from HIV-positive patients with AIDS (1 LSIL; 12 HSILs). After HPV typing, the entire HPV-16 E6 coding region was amplified and sequenced in all samples. We detected 12 HPV-16 E6 prototypes and 4 variants among the LSILs in HIV-negative patients, and 15 HPV-16 E6 prototypes and 17 HPV-16 variants in the HSIL group. The most prevalent variant of SIL types was European 350G, present in 3 and 13 cases, respectively. In 3 HSILs and no LSILs we found mixed infection by an HPV-16 E6 prototype and a variant. Two variants (1 each in LSIL and HSIL) were of non-European lineage. The only LSIL in HIV-positive patients had an HPV-16 E6 prototype; in the HSILs, we found 8 HPV-16 E6-prototypes, 4 with mixed infection with HPV-31 and 4 variants, all European 350G. The higher proportion of HPV-16 E6 variants in HSIL than in LSIL in HIV-negative patients suggests a greater risk of progression. However, further studies are needed.
authors.affiliation: Department of Pathology, Hospital del Rio Hortega, Valladolid, Spain.
authors.forename: L
authors.initials: L
authors.lastname: Pérez-Gallego
authors.forename: G
authors.initials: G
authors.lastname: Moreno-Bueno
authors.forename: D
authors.initials: D
authors.lastname: Sarrió
authors.forename: A
authors.initials: A
authors.lastname: Suárez
authors.forename: C
authors.initials: C
authors.lastname: Gamallo
authors.forename: J
authors.initials: J
authors.lastname: Palacios
mesh_terms: D000293:Adolescent; D000328:Adult; D001483:Base Sequence / Q000235:genetics; D005260:Female; D014644:Genetic Variation; D018023:HIV Seronegativity; D006679:HIV Seropositivity / Q000821:virology*; D006801:Humans; D008875:Middle Aged; D027383:Papillomaviridae / Q000145:classification* / Q000235:genetics*; D002577:Uterine Cervical Diseases / Q000821:virology*