AIM To investigate expression of cell cycle-related and expression-elevated protein in tumor(CREPT) in colorectal cancer(CRC) and determine its prognostic value in response to 5-fluorouracil(5-FU).METHODS The relative...AIM To investigate expression of cell cycle-related and expression-elevated protein in tumor(CREPT) in colorectal cancer(CRC) and determine its prognostic value in response to 5-fluorouracil(5-FU).METHODS The relative expression of CREPT in CRC tumor samples was determined using immunohistochemistry. The protein content in cell lines was analyzed by immunoblotting. Cell viability was measured with the CCK-8 assay. Cell cycle and apoptosis analyses were performed with flow cytometry.RESULTS CREPT was overexpressed in CRC tissues and correlated with histological grade. Clinicopathological analysis indicated that CREPT was positively related to tumor progression. Exogenous expression of CREPT stimulated cell proliferation and accelerated the cell cycle. More importantly, high expression of CREPT sensitized CRC cells to 5-FU treatment. Furthermore, we demonstrated that 5-FU elicited significant apoptosis in CREPT-positive cells.CONCLUSION Aberrant overexpression of CREPT contributes to tumorigenesis of CRC by promoting cell proliferation and accelerating the cell cycle, and confers sensitivity to 5-FU. CREPT is a potential prognostic biomarker for 5-FU in CRC.展开更多
基金Supported by The Key Project Grant from the National Natural Science Foundation of China,No.81372167,No.81572729,No.81402293,No.81372372 and No.81230044The National Key Research and Development Program of China,No.2016YFA0500301
文摘AIM To investigate expression of cell cycle-related and expression-elevated protein in tumor(CREPT) in colorectal cancer(CRC) and determine its prognostic value in response to 5-fluorouracil(5-FU).METHODS The relative expression of CREPT in CRC tumor samples was determined using immunohistochemistry. The protein content in cell lines was analyzed by immunoblotting. Cell viability was measured with the CCK-8 assay. Cell cycle and apoptosis analyses were performed with flow cytometry.RESULTS CREPT was overexpressed in CRC tissues and correlated with histological grade. Clinicopathological analysis indicated that CREPT was positively related to tumor progression. Exogenous expression of CREPT stimulated cell proliferation and accelerated the cell cycle. More importantly, high expression of CREPT sensitized CRC cells to 5-FU treatment. Furthermore, we demonstrated that 5-FU elicited significant apoptosis in CREPT-positive cells.CONCLUSION Aberrant overexpression of CREPT contributes to tumorigenesis of CRC by promoting cell proliferation and accelerating the cell cycle, and confers sensitivity to 5-FU. CREPT is a potential prognostic biomarker for 5-FU in CRC.
