Human papillomavirus (HPV) study of 691 pathological specimens from Quebec by PCR-direct sequencing approach

• Published in: Journal of medical virology Vol. 63; no. 4; pp. 284 - 292
• Main Authors: Feoli-Fonseca, Juan Carlos, Oligny, Luc L., Brochu, Pierre, Simard, Pierre, Falconi, Sarah, Yotov, Wagner V.
• Format: Journal Article
• Language: English
• Published: New York John Wiley & Sons, Inc 01-04-2001; Wiley-Liss
• Subjects: Adolescent; Adult; Biological and medical sciences; Biopsy; cervical intraepithelial neoplasia; Cervical Intraepithelial Neoplasia - pathology; Cervical Intraepithelial Neoplasia - virology; Child; Child, Preschool; DNA, Viral - analysis; Epidemiology; Female; Fundamental and applied biological sciences. Psychology; Hospitals, University; Human papillomavirus; Human viral diseases; Humans; Infant; Infectious diseases; Medical sciences; Microbiology; Middle Aged; Papillomaviridae - classification; Papillomaviridae - isolation & purification; papillomavirus; Papillomavirus Infections - pathology; Papillomavirus Infections - virology; Polymerase Chain Reaction; Quebec; Sequence Analysis, DNA; sequencing; Tumor Virus Infections - pathology; Tumor Virus Infections - virology; Uterine Cervical Neoplasms - pathology; Uterine Cervical Neoplasms - virology; Viral diseases; Viral diseases of the genital and urinary system; Virology; Canada; North America; America; Quebec; Human; Prevalence; Typing; Nucleotide sequence; Genotype; Papovaviridae; Uterine cervix; Malignant tumor; Female genital diseases; Infection; Papillomavirus; Virus; Human papillomavirus; Viral disease; Risk factor; Molecular epidemiology; Female; Uterine cervix diseases
• ISSN: 0146-6615; 1096-9071
• DOI: 10.1002/1096-9071(200104)63:4<284::AID-JMV1003>3.0.CO;2-H

Human papillomaviruses (HPV) are etiological agents of cervical cancer. In order to address clinical demand for HPV detection and sequence typing, mostly in pre‐cancerous cervical lesions, we applied our two‐tier PCR‐direct sequencing (PCR‐DS) approach based on the use of both MY09/MY11 and GP5 + /GP6 + sets of primers. We tested 691 pathological specimens, all of which were biopsies, 75% of which were diagnosed histologically as cervical intraepithelial neoplasia (CIN) grades I–III. In total, 484 samples (70%) tested HPV‐positive, yielding 531 HPV sequences from 47 HPV types, including two novel types. Four most frequently found HPV types accounted for 52.9% of all isolates: HPV6, 16, 11, and 31 (21.5%, 20.0%, 7.0%, and 4.5%, respectively). Some interesting results are the following: all currently known high‐risk HPV (14 types) and low‐risk HPV (6 types) were detected; HPV18 was not the 1st or 2nd but rather the 4th–5th most frequent high‐risk HPV type; the highest detection rate for HPV (86%) among samples suspected to be HPV‐infected was found in the youngest age group (0–10 years old), including 70% (44/63) “genital” HPV types; HPV types of undetermined cervical cancer risk represented 19% and of the total HPV isolates but were strongly increased in co‐infections (36.5% of all isolates). To our knowledge, this is the largest sequencing‐based study of HPV. The HPV types of unknown cancer risk, representing the majority of the known HPV types, 27 of the 47 types detected in this study, are not likely to play a major role in cervical cancer because their prevalence in CIN‐I, II, and III declines from 16% to 8% to 2.5%. The two‐tier PCR‐DS method provides greater sensitivity than cycle sequencing using only one pair of primers. It could be used in a simple laboratory setting for quick and reliable typing of known and novel HPV from clinical specimens with fine sequence precision. It could also be applied to anti‐cancer vaccine development. J. Med. Virol. 63:284–292, 2001. © 2001 Wiley‐Liss, Inc.