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Circ_0000285 is reported to play an oncogenic role in the development of cervical cancer (CC). The aim of this research was to investigate the diagnostic power of circ_0000285 in CC. The expression of circ_0000285 in 116 healthy volunteers, 65 early-stage CC (ESCC) patients, and 87 locally advanced CC (LACC) patients was detected by qRT-PCR. The diagnostic values of circ_0000285 for CC and ESCC were evaluated by ROC curves analysis. The circ_0000285 expression was upregulated in serum and cervical exfoliated cells from preoperative CC patients compared to that of healthy volunteers. Increased circ_0000285 expression was found in preoperative LACC patients more than that in ESCC patients. The circ_0000285 expression was downregulated in serum from CC patients after surgery. The postoperative CC patients with high serum circ_0000285 expression was more prone to have a tumour relapse. High circ_0000285 expression was positively correlated with SCC-Ag level and HPV positive rate. The AUC of circ_0000285 for the diagnosis of CC and ESCC were 0.855 and 0.804, better than CA125 and SCC-Ag. When circ_0000285, CA125, SCC-Ag and HPV were combined, the AUC could reach 0.911 and 0.894. In summary, highly expressed circ_0000285 from serum and cervical exfoliated cells might be a promising diagnostic biomarker for ESCC.Impact statementWhat is already known on this subject?  The CA125 and SCC-Ag have limitations in the diagnosis of ESCC. Recently, circRNAs have caused great attention and have been developing rapidly in clinical diagnosis of malignant tumours.What do the results of this study add?  Highly expressed circ_0000285 from serum and cervical exfoliated cells might be used as a novel, non-invasive biomarker for the diagnosis of ESCC.What are the implications of these findings for clinical practice and/or further research?  Circ_0000285 is superior to CA125 and SCC-Ag for the diagnosis of ESCC in clinical practice. The results help to supplement the shortcomings of traditional tumour markers and improve the diagnosis of ESCC. What is already known on this subject?  The CA125 and SCC-Ag have limitations in the diagnosis of ESCC. Recently, circRNAs have caused great attention and have been developing rapidly in clinical diagnosis of malignant tumours. What do the results of this study add?  Highly expressed circ_0000285 from serum and cervical exfoliated cells might be used as a novel, non-invasive biomarker for the diagnosis of ESCC. What are the implications of these findings for clinical practice and/or further research?  Circ_0000285 is superior to CA125 and SCC-Ag for the diagnosis of ESCC in clinical practice. The results help to supplement the shortcomings of traditional tumour markers and improve the diagnosis of ESCC.

Highly expressed circ_0000285 from serum and cervical exfoliated cells as a novel biomarker for the diagnosis of early stage-cervical cancer