title: Association between human papillomavirus type 16 E6 and E7 variants with subsequent persistent infection and recurrence of cervical high-grade squamous intraepithelial lesion after conization.
abstract: The study aimed to detect the variants of human papillomavirus (HPV) type 16 E6 and E7 in patients with cervical high-grade squamous intraepithelial lesion (HSIL), and to determine the existence and recurrence of persistent infection after treatment with loop electrosurgical excision procedure (LEEP). Preoperatively collected cervical exfoliated cells from 100 HPV 16 positive HSIL patients enrolled in the study were used to test for E6 and E7 variants. Follow-ups which included TCT, HPV test, and colposcopy were performed every 3 months after the operation, and colposcopic biopsy and endocervical curettage were performed for patients with abnormalities. Patients were followed for 2 years, and recurrence was defined as detecting low-grade squamous intraepithelial lesion (LSIL) or relapse of HSIL in 1 year. In 81% of patients, the E6 variant was the Asian prototype (As.P), 14% of patients had the European variant, 2% had the European prototype (EP), and 3% had the African 1 variant (Af1). The HPV16 could be easily cleared by LEEP in patients with As.P. Persistent infection or recurrence was very rare in this group. The patients with European variants T350G or A442C had a significantly higher incidence of persistent and recurring HPV16 infection. In conclusion, (i) in most cases, As.P caused HSIL. (ii) The European variant E6 T350G/A442C may be associated with higher rates of recurring and persistent HPV16 infection after the LEEP. (iii) The E7 gene mutation may not be a risk factor for recurring HSIL caused by HPV16 or persistent infection. J. Med. Virol. 88:1982-1988, 2016. © 2016 Wiley Periodicals, Inc.
authors.affiliation: Department of Obstetrics and Gynecology, Shanghai Pudong New Area People's Hospital, Shanghai, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Obstetrics and Gynecology, Shanghai Pudong New Area People's Hospital, Shanghai, China.
authors.forename: Binlie
authors.initials: B
authors.lastname: Yang
authors.affiliation: Department of Obstetrics and Gynecology, Shanghai Pudong New Area People's Hospital, Shanghai, China.
authors.forename: Ai
authors.initials: A
authors.lastname: Zhang
authors.affiliation: Department of Obstetrics and Gynecology, Shanghai Pudong New Area People's Hospital, Shanghai, China.
authors.forename: Aizhi
authors.initials: A
authors.lastname: Zhou
authors.affiliation: Department of Obstetrics and Gynecology, Shanghai Pudong New Area People's Hospital, Shanghai, China.
authors.forename: Jieyan
authors.initials: J
authors.lastname: Yuan
authors.affiliation: Department of Obstetrics and Gynecology, Shanghai Pudong New Area People's Hospital, Shanghai, China.
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Obstetrics and Gynecology, Shanghai Pudong New Area People's Hospital, Shanghai, China.
authors.forename: Liyan
authors.initials: L
authors.lastname: Sun
authors.affiliation: Department of Obstetrics and Gynecology, Shanghai Pudong New Area People's Hospital, Shanghai, China.
authors.forename: Huimin
authors.initials: H
authors.lastname: Cao
authors.affiliation: Department of Obstetrics and Gynecology, Shanghai Pudong New Area People's Hospital, Shanghai, China.
authors.forename: Jieru
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Pathology, University of Arizona College of Medicine, Tucson, Arizona.|Department of Obstetrics and Gynecology, University of Arizona, Tucson, Arizona.
authors.forename: Wenxin
authors.initials: W
authors.lastname: Zheng
mesh_terms: D000328:Adult; D002584:Cervix Uteri / Q000166:cytology / Q000601:surgery; D019092:Conization; D005260:Female; D052162:Human papillomavirus 16 / Q000235:genetics* / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local; D009856:Oncogene Proteins, Viral / Q000235:genetics*; D050725:Papillomavirus E7 Proteins / Q000235:genetics*; D030361:Papillomavirus Infections / Q000175:diagnosis / Q000821:virology*; D011247:Pregnancy; D011446:Prospective Studies; D012097:Repressor Proteins / Q000235:genetics*; D012307:Risk Factors; D065310:Squamous Intraepithelial Lesions of the Cervix / Q000821:virology*; D014626:Vaginal Smears; D002578:Uterine Cervical Dysplasia / Q000821:virology*
chemical_list: C068651:E6 protein, Human papillomavirus type 16; D009856:Oncogene Proteins, Viral; D050725:Papillomavirus E7 Proteins; D012097:Repressor Proteins; C059731:oncogene protein E7, Human papillomavirus type 16
keywords: HPV variants; conization; high-grade squamous intraepithelial lesion (HSIL); human papillomavirus (HPV) type 16; loop electrosurgical excision procedure (LEEP)