Evaluating DNA methylation markers and extended HPV genotyping in first-void urine for detecting high-grade cervical lesions in HPV-positive women: a cross-sectional study
摘要
First-void urine (FVU) collection for high-risk human papillomavirus (HPV) testing may reach un(der)-screened women in cervical cancer screening programs. This cross-sectional study investigated the clinical performance of DNA methylation markers ASCL1 and LHX8 in HPV-positive FVU for detecting high-grade cervical intraepithelial neoplasia and cancer (CIN2+ and CIN3+). Additionally, results were compared with paired HPV-positive clinician-collected cervical samples (CS) and HPV genotyping.
MethodsPaired FVU and CS samples were collected from 286 women aged 23–64 years referred for colposcopy or cervical excision. Histological endpoints included 123 ≤ CIN1 (no dysplasia and CIN1), 38 CIN2, and 123 CIN3/AIS and 2 cancers. Samples were tested for HPV DNA and ASCL1/LHX8 methylation. Methylation test performance was evaluated by area under the curve (AUC) and logistic regression. Differences between paired samples and across methylation, HPV16/18, and extended HPV16/18/31/33/52 genotyping in FVU were tested using McNemar’s test.
ResultsASCL1 and LHX8 methylation levels in HPV-positive FVU increased significantly with disease severity. Methylation testing in FVU yielded an AUC of 0.76 (95% CI: 0.70–0.82) for CIN3 + and 0.73 (95% CI: 0.67–0.79) for CIN2 + , with sensitivities of 79.2% (95% CI: 71.0–85.9%) and 75.5% (95% CI: 68.1–81.9%), respectively, and a specificity of 57.0% (95% CI: 47.8–65.8%) for ≤ CIN1. In CS, methylation testing yielded higher AUCs of 0.84 (95% CI: 0.79–0.89) for CIN3 + and 0.80 (95% CI: 0.75–0.85) for CIN2 + , with significantly higher sensitivities (p ≤ 0.02) but lower specificity (p = 0.04) than FVU. In women aged ≥ 30 years, CIN3 + sensitivity and specificity for ≤ CIN1 were similar between FVU and CS (both p = 0.09). No significant differences in accuracy were observed between methylation testing and extended genotyping (p ≥ 0.35) in FVU, while methylation testing showed higher sensitivity (p < 0.01) but lower specificity (p < 0.01) than HPV16/18 genotyping.
ConclusionsASCL1/LHX8 methylation testing in HPV-positive FVU showed promise for detecting high-grade cervical disease. Its performance in FVU did not differ significantly from extended HPV genotyping and, in women aged ≥ 30 years, was comparable to performance in CS. This supports methylation testing as a complementary triage test alongside HPV genotyping in urine-based cervical cancer screening, removing the need for follow-up cervical sampling. Further validation in HPV-positive FVU from un(der)-screened populations is warranted.
Trial registrationClinicalTrials.gov: NCT05065853.