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401 Clinical evaluation of DNA methylation and HPV DNA testing in urine for cervical intraepithelial neoplasia and cervical cancer detection
  1. R Van den Helder1;2,
  2. RDM Steenbergen1,
  3. AP Van Splunter1,
  4. I Martins3,
  5. CH Mom4,
  6. MY Tjiong4,
  7. F Rosier-van Dunné5,
  8. IAM Van der Avoort6,
  9. MCG Bleeker1 and
  10. N Van Trommel2
  1. 1Amsterdam University Medical Center (UMC), Vrije Universiteit Amsterdam, Department of Pathology, Amsterdam UMC, Netherlands
  2. 2Antoni van Leeuwenhoek/Netherlands Cancer Institute, Center of Gynecologic Oncology Amsterdam, Department of Gynecologic Oncology, Amsterdam, Netherlands
  3. 3Amsterdam University Medical Center (UMC), Vrije Universiteit Amsterdam, Department of Epidemiology and Biostatistics, Amsterdam, Netherlands
  4. 4Amsterdam University Medical Center (UMC), Amsterdam Medical Center, Department of Gynecologic Oncology, Amsterdam, Netherlands
  5. 5Tergooi, Department of Obstetrics and Gynecology, Hilversum, Netherlands
  6. 6Ikazia Hospital Rotterdam, Department of Obstetrics and Gynecology, Rotterdam, Netherlands


Introduction/Background*Urine, as a liquid biopsy, can be obtained easily and noninvasively. Urine sampling might increase effectiveness of cervical cancer screening programs, by attracting women currently unreached by conventional screening methods (e.g. repetitive non-responders). An emerging biomarker for early cancer detection is DNA methylation. Altered DNA methylation is a common epigenetic event that occurs during the early stages of carcinogenesis, and has been linked to gene silencing of tumor suppressor genes. We aimed to determine the performance of high risk human papillomavirus (hrHPV) and host cell gene DNA methylation testing in urine for cervical cancer and high-grade cervical intraepithelial neoplasia (CIN2 and CIN3) detection. Paired cervicovaginal samples, used for conventional cervical cancer screening, were tested for comparison.

Methodology A total of 269 women were included in this study: 113 women diagnosed with cervical cancer (paired urine samples, cervicovaginal self-samples and cervical scrapes), 92 women diagnosed with a CIN2 or CIN3 lesion (paired urine samples and cervicovaginal self-samples) and 64 healthy female controls (urine samples). Samples were tested for five DNA methylation markers (ASCL1, GHSR, LHX8, SST, ZIC1) and hrHPV DNA. Methylation levels in urine were compared, performance was calculated based on AUCs and logistic regression, and a marker panel was obtained by multivariable logistic regression. Agreement within samples was determined using Cohen’s kappa statistics and the Spearman correlation coefficients.

Result(s)*All markers in urine increased significantly with severity of disease, marker panel ASCL1/LHX8 resulted in an AUC of 0.84 for cervical cancer and CIN3 (CIN3+) detection, with a sensitivity of 77% and 86%, at a predefined specificity of 80% and 70%. In samples from women with cervical cancer, 83% hrHPV-positivity and 94% ASCL1/LHX8-positivity was found in urine, 88% and 94% in self-samples, and 92% and 98% in cervical scrapes, respectively. Between paired samples from women with CIN2/3 and cervical cancer, a fair to strong correlation for methylation markers and a moderate to strong agreement for hrHPV DNA was found.

Conclusion*For women currently unreached by conventional screening methods, DNA methylation and hrHPV DNA testing in urine offers a promising solution to detect cervical cancer and high grade CIN lesions.

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