Previous Article | Next Article ![]()
Journal of Clinical Microbiology, Apr 1997, 886-891, Vol 35, No. 4
DC Swan, RA Tucker, BP Holloway and JP Icenogle
A simple method for the detection of a number of human papillomavirus (HPV)
genotypes associated with cervical cancer has been developed. The assay
exploits the 5'-->3' exonucleolytic activity of Taq DNA polymerase to
increase the signal from fluorescent dyes by releasing them from
genotype-specific probes during PCR. The probes are oligonucleotides with a
5' reporter dye (6-carboxyfluorescein), a quencher dye
(6-carboxy-tetramethyl-rhodamine), and a phosphate-blocked 3' end. In the
intact probe, the proximity of the reporter and the quencher results in
suppression of reporter fluorescence by Forster- type energy transfer (V.
T. Forster. Ann. Phys. 2:55-75, 1948). If the probe is bound downstream of
either primer during PCR, the 5'-->3' exonucleolytic activity of Taq
polymerase degrades it, allowing the reporter to diffuse away from the
quencher, which results in an increase in reporter fluorescence. The
increased fluorescence is directly related to the amount of target DNA and
can be detected with an automated fluorometer. Probes for the L1 region of
the cervical- cancer-associated HPV types 16, 18, 31, 33, and 35 were
synthesized and the assays were optimized. The most sensitive assay can
detect as few as two copies of HPV DNA in human cervical specimens.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
A sensitive, type-specific, fluorogenic probe assay for detection of human papillomavirus DNA
Human Papillomavirus Section, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Public Health Service, U.S. Department of Health and Human Services, Atlanta, Georgia 30333, USA. dcs1@ciddvd1.em.cdc.gov
This article has been cited by other articles:
| Antimicrob. Agents Chemother. | Clin. Microbiol. Rev. |
|---|---|
| Clin. Vaccine Immunol. | ALL ASM JOURNALS |
|---|