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Journal of Clinical Microbiology, February 2000, p. 688-695, Vol. 38, No. 2
McArdle Laboratory for Cancer
Research1 and Department of Human
Oncology,7 University of Wisconsin Medical
School, and Epicentre Technologies,2
Madison, Wisconsin; Department of Virology,
Umeåa,3 and Karolinska Institute,
Stockholm,4 Sweden; and University of
South Carolina School of Medicine5 and
University of South Carolina School of Public
Health,6 Columbus, South Carolina
Received 4 May 1999/Returned for modification 11 August
1999/Accepted 22 November 1999
Many human papillomavirus (HPV) genotypes are associated with
cervical carcinoma. We demonstrate the utility of an innovative technique for genotyping of HPV in cervical tissue samples. This method
provides an accurate means of identification of the specific HPV
genotypes present in clinical specimens. By using the MY09-MY11 and the
GP5+-GP6+ consensus primer pairs, HPV sequences
were amplified by nested PCR from DNA isolated from cervical smear
samples. This led to the production of an approximately 140-bp PCR
product from the L1 (major capsid) gene of any of the HPVs present in
the sample. PCR was performed with a deoxynucleoside triphosphate
mixture which resulted in the incorporation of deoxyuridine into the
amplified DNA product at positions where deoxythymidine would normally
be incorporated at a frequency of about once or twice per strand. Following the PCR, the product was treated with an enzyme mix that
contains uracil N-glycosylase (UNG) and endonuclease IV. UNG removes the uracil base from the nucleotide, and endonuclease IV
cleaves the phosphodiester bond at this newly formed abasic site,
producing fragments of various sizes. By having end labeled one of the
amplification primers, a DNA ladder which is analogous to a
"T-sequencing ladder" was produced upon electrophoresis of the
products. By comparing this T-sequencing ladder to the known sequences
of HPVs, the genotypes of unknown HPV isolates in samples were
assigned. Data showing the utility of this technique for the rapid
analysis of clinical samples are presented.
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
A Novel and Rapid PCR-Based Method for Genotyping
Human Papillomaviruses in Clinical Samples

*
Corresponding author. Mailing address: McArdle
Laboratory for Cancer Research, 1400 University Ave., Madison, WI
53706. Phone: (608) 262-8533. Fax: (608) 262-2824. E-mail:
lambert{at}oncology.wisc.edu.
Present address: MWG Biotech Inc., High Point, NC 27265.
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