Quantitative determination of human telomerase reverse transcriptase messenger RNA expression in premalignant cervical lesions and correlation with human papillomavirus load

Hum Pathol. 2006 Feb;37(2):135-42. doi: 10.1016/j.humpath.2005.09.031. Epub 2005 Dec 27.

Abstract

Expression of human telomerase reverse transcriptase (hTERT) messenger RNA (mRNA) and human papillomavirus (HPV)-16 load were quantified using real-time polymerase chain reaction and correlated with cytological findings and the presence of HPV infection in cervical specimens. Human telomerase reverse transcriptase mRNA expression was evaluated in 15 (20.5%) of 73 specimens of atypical squamous epithelial cells of undetermined significance, in 62 (39.7%) of 156 low-grade squamous intraepithelial lesions (LGSILs), in 49 (96%) of 51 high-grade squamous intraepithelial lesions (HGSILs), and in 9 (20%) of 45 normal samples, whereas viral load was quantified in 52 (89.6%) of 58 samples infected with HPV-16. The mean levels of hTERT mRNA expression were 0.11 in normal tissue, 0.23 in atypical squamous epithelial cells of undetermined significance, 0.75 in LGSILs, and 2.5 in HGSILs. Thus, a significant increase in hTERT mRNA expression was observed with increasing degrees of cervical dysplasia. The HPV-16 load was significantly higher in samples of HGSIL than in those of LGSILs (P < .001). A significant correlation was observed between viral load and quantitative hTERT mRNA expression (r = 0.65; P < .05). Quantitative hTERT mRNA assessment showed 96% sensitivity and 100% negative predictive value for high-grade dysplasia, whereas the specificity and positive predictive value were 72% and 36.2%, respectively. It is suggested that quantitative hTERT has a very high sensitivity and negative predictive value, whereas the observed specificity was moderate, indicating that it cannot be used as a diagnostic marker but may be an adjunct in the management of women with high-grade cervical dysplasia. However, the final diagnosis must rely on the inclusion of clinical evaluation and additional assessment data.

MeSH terms

  • Adult
  • DNA-Binding Proteins / biosynthesis
  • DNA-Binding Proteins / genetics*
  • Female
  • Human papillomavirus 16 / isolation & purification*
  • Humans
  • Middle Aged
  • Papillomavirus Infections / enzymology*
  • Papillomavirus Infections / virology
  • Polymerase Chain Reaction
  • Precancerous Conditions / enzymology*
  • Precancerous Conditions / virology
  • RNA, Messenger / metabolism*
  • Telomerase / biosynthesis
  • Telomerase / genetics*
  • Uterine Cervical Dysplasia / enzymology*
  • Uterine Cervical Dysplasia / virology
  • Uterine Cervical Neoplasms / enzymology*
  • Uterine Cervical Neoplasms / virology
  • Viral Load*

Substances

  • DNA-Binding Proteins
  • RNA, Messenger
  • Telomerase