title: Genomic organization of human papillomavirus type 18 in cervical cancer specimens.
abstract: It has been reported that cervical cancers positive for human papillomavirus (HPV) 18 have a poorer prognosis than those with other HPV types. To gain a better understanding of the aggressive character of HPV 18-positive cancers, we examined the difference in genomic organization between HPV 18 and HPV 16 harbored in cervical cancers. We amplified E1 and E2 genes from 9 HPV 18-positive and 31 HPV 16-positive cervical cancers by polymerase chain reaction (PCR). At least one of the two early genes was missing in 3 out of 9 HPV 18-positive cancers, while both PCRs were positive in all 31 HPV 16-positive cancers (P < 0.05). We then analyzed the 9 HPV 18-positive cancers by 15 contiguous polymerase chain reactions covering collectively the whole HPV 18 genome. In addition to the three with a deletion of the E1 or E2 gene, one had a deletion in the E5 and L2 genes and one had an insertion in the long control region. The frequent alterations in genomic organization, especially preferential deletion of the E1 or E2 gene, may be related to the more aggressive properties of HPV 18-positive cervical cancers.
authors.affiliation: Department of Obstetrics and Gynecology, University of Tokyo.
authors.forename: K
authors.initials: K
authors.lastname: Kitagawa
authors.forename: H
authors.initials: H
authors.lastname: Yoshikawa
authors.forename: T
authors.initials: T
authors.lastname: Onda
authors.forename: T
authors.initials: T
authors.lastname: Kawana
authors.forename: Y
authors.initials: Y
authors.lastname: Taketani
authors.forename: H
authors.initials: H
authors.lastname: Yoshikura
authors.forename: A
authors.initials: A
authors.lastname: Iwamoto
mesh_terms: D000230:Adenocarcinoma / Q000401:mortality / Q000821:virology*; D000328:Adult; D000368:Aged; D001483:Base Sequence; D002213:Capsid / Q000235:genetics; D036022:Capsid Proteins; D018196:Carcinoma, Adenosquamous / Q000401:mortality / Q000821:virology*; D002294:Carcinoma, Squamous Cell / Q000401:mortality / Q000821:virology*; D015344:DNA Probes, HPV; D004273:DNA, Neoplasm / Q000235:genetics; D004279:DNA, Viral / Q000235:genetics; D004268:DNA-Binding Proteins; D005260:Female; D006801:Humans; D008875:Middle Aged; D008969:Molecular Sequence Data; D015513:Oncogene Proteins / Q000235:genetics; D009856:Oncogene Proteins, Viral / Q000235:genetics / Q000502:physiology*; D027383:Papillomaviridae / Q000145:classification / Q000235:genetics / Q000302:isolation & purification* / Q000472:pathogenicity; D030361:Papillomavirus Infections / Q000821:virology*; D016133:Polymerase Chain Reaction; D011379:Prognosis; D017384:Sequence Deletion; D014412:Tumor Virus Infections / Q000821:virology*; D002583:Uterine Cervical Neoplasms / Q000401:mortality / Q000821:virology*; D014774:Virulence / Q000235:genetics; D002578:Uterine Cervical Dysplasia / Q000401:mortality / Q000821:virology*
chemical_list: D036022:Capsid Proteins; D015344:DNA Probes, HPV; D004273:DNA, Neoplasm; D004279:DNA, Viral; D004268:DNA-Binding Proteins; C093478:E1 protein, Human papillomavirus 16; C054855:E2 protein, Human papillomavirus type 16; C099170:L2 protein, Human papillomavirus type 18; D015513:Oncogene Proteins; D009856:Oncogene Proteins, Viral; C084762:oncogene protein E1, Human papillomavirus type 18; C069102:oncogene protein E2, Human papillomavirus type 18