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Published on: March 11, 2014
Detection of human papillomaviruses in cervical neoplasias using multiple sets of generic polymerase chain reaction
1Department of Molecular Virology, School of Medicine, Chiba University, 1-8-1 Inohana, Chuou-ku, Chiba 260, Japan.
Objective:
The aim of this study was to evaluate precisely the differences in the spectra of human papillomavirus (HPV) types detected by different generic primer pairs commonly used for detection of this extraordinarily heterogeneous virus.
Methods:
Three sets of polymerase chain reaction (PCR) primers for the L1 open reading frame (ORF) and two sets for E6/E7 ORFs were used to detect HPVs in DNAs from 107 cervical tissues, including 77 cervical neoplasias. HPV types were determined by analysis of restriction fragment length polymorphisms (RFLPs) and nucleotide sequencing.
Results:
A high overall detection rate of HPV in cervical neoplasias (76/77, 98.7%) was achieved by polymerase chain reaction (PCR) amplification with multiple sets of generic primers, while the detection rate for each individual primer pair varied from 48/77 (62%) to 70/77 (91%). Only in 34 of 77 cases (44%) were HPV DNAs positive for all sets of primer pairs. Further determination of HPV types by RFLPs and nucleotide sequencing showed inconsistencies between the PCR primer pairs used.
Conclusion:
Our study revealed that the HPV detection rate is critically affected by the choice of PCR primers, and that appropriate use of combinations of generic PCR primer sets followed by RFLP analyses is both necessary and sufficient for typing most HPVs in cervical lesions. More precise methods such as sequencing would be necessary in only a few cases.
