Abstract
This work proposes a method to assess the molecular profile of perioperative circulating tumor cells in peripheral blood (PB) of colorectal cancer patients for differentiating the dissemination process of tumor cells. Two-point quantification of multiple marker genes was designed for describing the profile. The expression levels of cytokeratin 20 (CK20), carcino-embryonic antigen (CEA) and survivin mRNA in PB and tumor tissue samples in 37 colorectal cancer patients from 1 d pre-operation to 2 h post-operation were detected with real-time quantitative reverse transcription-polymerase chain reaction. β-Actin mRNA was used as internal control to standardize the results of different mRNA expression levels. The data analysis using Stata statistical packages, Chi-Square test and Mann-Whitney test indicated the expression level of CEA mRNA in PB increased significantly, while those of CK20 and survivin mRNA decreased significantly. Quantitative comparison with tumor tissues indicated that the increase of CEA mRNA level in PB coincided with the decrease of CK20 and survivin mRNA levels in different tumor cells. These results showed surgical manipulation caused tumor cells shedding into blood from primary tumor tissue and significant increase of CEA mRNA level, while occult tumor cells with high expression levels of CK20 and survivin mRNA before surgery decreased after surgery.
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Supported by the Outstanding Medical Talents Program (Grant No. RC2007069) from Department of Health of Jiangsu Province, the National Science Funds for Creative Research Groups (Grant No. 20821063), the Major Research Plan (Grant No. 90713015) and General Programs (Grant Nos. 20845005 & 20875044) from the National Natural Science Foundation of China
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Yan, F., Liu, Z., Zhao, J. et al. Dissemination profile of perioperative tumor cells in peripheral blood of colorectal cancer patients detected by multiple marker genes. Sci. China Ser. B-Chem. 52, 2257–2263 (2009). https://doi.org/10.1007/s11426-009-0267-9
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DOI: https://doi.org/10.1007/s11426-009-0267-9