Type distribution, viral load and integration status of high-risk human papillomaviruses in pre-stages of cervical cancer (CIN).

Abstract:

:A series of 176 archival cervical intraepithelial neoplasia (CIN) was analysed for the presence, viral load and integration status of 'high-risk' types of human papillomavirus (HR-HPV). The samples were assayed using newly developed methods based on real-time PCR. Two methods for the extraction of DNA from the paraffin-embedded biopsies were compared: a protocol based on the MagNA pure system (Roche) and a Qiagen spin column kit (Qiagen). It was possible to amplify 94% (166) of the samples. Of these, 36, 63 and 80% of the CIN I, II and III cases contained HR-HPV. HPV 16 was the most prevalent, and was found in 20, 28 and 46% of the CIN I, II and III cases, respectively. The second most frequent HR-HPV was type 33 group, and in CIN II it was as prevalent as HPV 16. The median number of copies of HR-HPV per cell was not significantly different in the CIN I, II and III cases, but there was a wide range of viral load values over several magnitudes, regardless of the grade of CIN. All samples were found to contain integrated forms of HPV 16, frequently mixed with an episomal form.

journal_name

Br J Cancer

authors

Andersson S,Safari H,Mints M,Lewensohn-Fuchs I,Gyllensten U,Johansson B

doi

10.1038/sj.bjc.6602648

subject

Has Abstract

pub_date

2005-06-20 00:00:00

pages

2195-200

issue

12

eissn

0007-0920

issn

1532-1827

pii

6602648

journal_volume

92

pub_type

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