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Journal of Clinical Microbiology, 02 1996, 369-375, Vol 34, No. 2
A Adachi, T Kiyono, Y Hayashi, M Ohashi and M Ishibashi
Our discovery of human papillomavirus type 47 (HPV47) in benign lesions
from a patient suffering from epidermodysplasia verruciformis prompted us
to examine whether the viral DNA also resided in malignant lesions from the
same patient. By using newly devised protocols for amplifying a group of
epidermodysplasia verruciformis-associated HPV DNAs by PCR and
differentially identifying them by reverse-phase dot blot hybridization, we
demonstrated that HPV47 DNA, but not other HPV DNAs of the group, was
abundant (about 10(3) copies per diploid amount of cell DNA) in DNAs
prepared from three carcinomas. Using DNA from one of these carcinomas, we
also confirmed that DNA of HPV5, HPV14, or HPV21, detected in significant
amounts in DNAs from benign lesions from the patient, were present only in
negligible amounts or not at all. The results suggest the involvement of
HPV47 DNA in tumorigenesis. Furthermore, we demonstrated by the Southern
technique that most, if not all, of the HPV47 DNA consists of either a unit
(or a nongrossly deleted unit) length of the viral genome carrying no (or
no gross) internal rearrangements or tandem repeats. This and other results
obtained by this technique indicated that a considerable amount of the
viral DNA resides as a circular monomer a unit length of the viral genome
in carcinoma cells, while the remainder reside as catenanes, concatemers,
or both. The concatemers were considered more likely to be replicated
without integration into cellular DNA than to be integrated, because no
bands for the corresponding fragments including integration sites were
detected by treatment with restriction enzymes that would have produced
such fragments.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
Detection of human papillomavirus (HPV) type 47 DNA in malignant lesions from epidermodysplasia verruciformis by protocols for precise typing of related HPV DNAs
Laboratory of Viral Oncology, Research Institute, Nagoya, Japan.
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