CAPZB mRNA is a novel biomarker for cervical high-grade squamous lesions

This study aimed to evaluate the potential of capping protein (actin filament) muscle Z-line subunit β (CAPZB) messenger ribonucleic acid (mRNA) levels as a biomarker for distinguishing low-grade squamous intraepithelial lesions of the cervix (LSIL) from high-grade squamous intraepithelial lesions of the cervix (HSIL). We collected a total of 166 cervical exfoliated cells and divided them into five groups based on histopathological results. Each sample was divided into two portions, one for fluorescence in situ hybridization (FISH) detection and the other for bisulfite sequencing polymerase chain reaction (BSP) detection. We found that FISH detection of CAPZB mRNA mean fluorescence intensity (MFI) and BSP detection of CAPZB deoxyribonucleic acid (DNA) percentage of methylation rate (PMR) performed as biomarkers for distinguishing HSIL from LSIL, with an area under the receiver operating characteristic curve (AUC), sensitivity, specificity and cut-off value of 0.893, 81.25%, 80.39% and 0.616, 0.794, 64.06%, 81.37% and 0.454, respectively. Furthermore, FISH detection of CAPZB mRNA exhibited a greater AUC (0.893) for the detection of HSIL than the CAPZB DNA methylation method (0.794), indicating the CAPZB mRNA levels can be used as a biomarker for assessing cervical lesions.