Abstract
Colorectal cancer (CRC) threatens human health seriously. Early diagnosis of CRC is critical to improving patient survival. Meanwhile, non-invasive detection through tumor-circulating markers can be an important auxiliary diagnosis. In this study, we performed targeted RNA sequencing in paired tumor and adjacent normal fresh frozen tissues from 68 patients, and we also measured circulating mRNA levels in 4 time-point plasma samples collected before and after operation or chemotherapy. Our results showed that SOX9 (6.73-fold with adjusted p value < 1 × 10–45), MYC (20.59-fold with adjusted p value < 1 × 10–57), and MMP7 (131.94-fold with adjusted p value < 1 × 10–78) highly expressed in tumor compared with adjacent normal tissues. Besides, the circulating mRNA of SOX9 (41.14-fold with adjusted p value < 1 × 10–13) in CRC was significantly higher than in the normal control as well. Moreover, a SOX9-based 9-gene panel (SOX9, GSK3A, FZD4, LEF1, DVL1, FZD7, NFATC1, KRT19, and RUVBL1) showed the non-invasive diagnostic value of CRC (AUC: 0.863 (0.766–0.960), TPR: 0.92, TNR: 0.87). In summary, SOX9 expression consistently increases in tumor and plasma samples from CRC patients, which indicates the important role of SOX9 in CRC progression and its potential in non-invasive diagnosis of CRC.
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This work was supported by Research Grants Council HK and HK Innovation and Technology Fund University-Industry Collaborative Programme (RGCQ71P and UIM/354), and National Natural Science Foundation of China (82103438).
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SCCW contributed to the study conception and design. Material preparation, data collection, and analysis were performed by VWX and SCCW, and YKEW and HFT processed the patient samples and technical work before sequencing library preparation. SSMN, HTW, WWL, and YNW gave invaluable comments on the subject recruitment and data interpretation. ACSY and AKYY advised bioinformatic analysis. WCSC and WCST gave invaluable comments on data analysis. The first draft of the manuscript was written by VWX and SCCW, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the Joint Chinese University of Hong Kong and New Territories Easter Cluster Clinical Research Ethics Committee (CREC Ref. No.: 2014.224).
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Xue, V.W., Ng, S.S.M., Tsang, H.F. et al. The non-invasive diagnosis of colorectal cancer via a SOX9-based gene panel. Clin Exp Med 23, 2421–2432 (2023). https://doi.org/10.1007/s10238-022-00970-6
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DOI: https://doi.org/10.1007/s10238-022-00970-6