Comparison of HPV genotyping by type-specific PCR and sequencing

Mem Inst Oswaldo Cruz. 2010 Feb;105(1):73-8. doi: 10.1590/s0074-02762010000100011.

Abstract

Human papillomavirus (HPV) infection is the most common sexually transmitted disease worldwide and there is a strong link between certain high-risk viral types and cervical carcinogenesis. Although there are several typing methods, it is still unclear which test is the best. This study compared the effectiveness of type-specific PCR (TS-PCR) and sequencing, with a focus on their clinical application. A total of 260 cervical samples from HPV-positive patients were tested for types 6, 11, 16, 18, 31, 33 and 35 using TS-PCR and sequencing. The genotype was identified in 36% of cases by TS-PCR and in 75% by sequencing. Sequencing was four times more likely to identify the viral type in positive samples than TS-PCR (p = 0.00). Despite being more effective for virus genotyping, sequencing was unable to identify viral types in multiple infections. Combining both techniques resulted in highly sensitive detection (87% of cases), showing that they are complementary methods. HPV genotyping is an important step in HPV management, helping to identify patients with a higher risk of developing cervical cancer and contributing to the development of type-specific vaccines.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • DNA, Viral / genetics*
  • Female
  • Genotype*
  • Humans
  • Papillomaviridae / genetics*
  • Papillomaviridae / isolation & purification
  • Papillomavirus Infections / virology*
  • Polymerase Chain Reaction / methods*
  • Sequence Analysis, DNA
  • Species Specificity

Substances

  • DNA, Viral