Performance of a new HPV and biomarker assay in the management of hrHPV positive women: Subanalysis of the ongoing multicenter TRACE clinical trial (n > 6, 000) to evaluate POU4F3 methylation as a potential biomarker of cervical precancer and cancer. Issue 5 (1st March 2017) - Kocsis, Adrienn
Abstract : The ongoing Triage and Risk Assessment of Cervical Precancer by Epigenetic Biomarker (TRACE) prospective, multicenter study aimed to provide a clinical evaluation of the CONFIDENCE™ assay, which comprises a human papillomavirus (HPV) DNA and a human epigenetic biomarker test. Between 2013 and 2015 over 6, 000 women aged 18 or older were recruited in Hungary. Liquid‐based cytology (LBC), high‐risk HPV (hrHPV) DNA detection and single target host gene methylation test of the promoter sequence of the POU4F3 gene by quantitative methylation‐specific polymerase chain reaction (PCR) were performed from the same liquid‐based cytology sample. The current analysis is focused on the baseline cross‐sectional clinical results of 5, 384 LBC samples collected from subjects aged 25 years or older. The performance of the CONFIDENCE HPV™ test was found to be comparable to the cobas® HPV test with good agreement. When applying the CONFIDENCE Marker™ test alone in hrHPV positives, it showed significantly higher sensitivity with matching specificity compared to LBC‐based triage. For CIN3+ histological endpoint in the age group of 25–65 and 30–65, the methylation test of POU4F3 achieved relative sensitivities of 1.74 (95% CI: 1.25–2.33) and 1.64 (95% CI: 1.08–2.27), respectively, after verification bias adjustment. On the basis of our findings, POU4F3 methylation as a triage test of hrHPV positives appears to be a noteworthy method. We can reasonably assume that its quantitative nature offers the potential for a more objective and discriminative risk assessment tool in the prevention and diagnostics of high‐grade cervical intraepithelial neoplasia (CIN) lesions and cervical cancer. Abstract : What's new? Combining DNA methylation biomarker detection with high‐risk human papillomavirus (hrHPV) testing is a promising screening option for cervical cancer. Currently, one of the largest clinical studies designed to evaluate human epigenetic biomarker testing for cervical screening is the Triage and Risk Assessment of Cervical Precancer by Epigenetic Biomarker (TRACE) study. In this TRACE analysis, methylation of the POU4F3 promoter, a candidate marker for high‐grade HPV‐positive cervical intraepithelial lesions (CIN3+), showed significantly higher sensitivity and similar specificity for CIN3+ than liquid‐based cytology. The findings suggest that quantitative methylation of POU4F3 is a valuable tool for high‐grade CIN detection.