Abstract:
:Human papillomavirus (HPV) genomes usually persist as episomal molecules in HPV associated preneoplastic lesions whereas they are frequently integrated into the host cell genome in HPV-related cancers cells. This suggests that malignant conversion of HPV-infected epithelia is linked to recombination of cellular and viral sequences. Due to technical limitations, precise sequence information on viral-cellular junctions were obtained only for few cell lines and primary lesions. In order to facilitate the molecular analysis of genomic HPV integration, we established a ligation-mediated PCR assay for the detection of integrated papillomavirus sequences (DIPS-PCR). DIPS-PCR was initially used to amplify genomic viral-cellular junctions from HPV-associated cervical cancer cell lines (C4-I, C4-II, SW756, and HeLa) and HPV-immortalized keratinocyte lines (HPKIA, HPKII). In addition to junctions already reported in public data bases, various new fusion fragments were identified. Subsequently, 22 different viral-cellular junctions were amplified from 17 cervical carcinomas and 1 vulval intraepithelial neoplasia (VIN III). Sequence analysis of each junction revealed that the viral E1 open reading frame (ORF) was fused to cellular sequences in 20 of 22 (91%) cases. Chromosomal integration loci mapped to chromosomes 1 (2n), 2 (3n), 7 (2n), 8 (3n), 10 (1n), 14 (5n), 16 (1n), 17 (2n), and mitochondrial DNA (1n), suggesting random distribution of chromosomal integration sites. Precise sequence information obtained by DIPS-PCR was further used to monitor the monoclonal origin of 4 cervical cancers, 1 case of recurrent premalignant lesions and 1 lymph node metastasis. Therefore, DIPS-PCR might allow efficient therapy control and prediction of relapse in patients with HPV-associated anogenital cancers.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Luft F,Klaes R,Nees M,Dürst M,Heilmann V,Melsheimer P,von Knebel Doeberitz Mkeywords:
subject
Has Abstractpub_date
2001-04-01 00:00:00pages
9-17issue
1eissn
0020-7136issn
1097-0215pii
10.1002/1097-0215(20010401)92:1<9::AID-IJC1144>3.0journal_volume
92pub_type
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