Comparative Proteomics of Apoptosis Initiation Induced by 5-Fluorouracil in Human Gastric Cancer

Chun-Yan Chen ； Ji-Hui Jia ； Mao-Xiu Zhang ； Ya-Bin Zhou ； Rong-Mei Zhang ； Xiu-Ping Yu

《The Chinese Journal of Physiology》 49卷1期 (2006/02) Pp. 31-38

並列摘要

5-Fluorouracil is the first choice chemotherapeutic drug for patients with gastric cancer, but the mechanism that 5-fluorouracil plays the anti-tumor role remains unclear. The aim of this study was to clarify correlation proteins induced by 5-fliorouracil in the apoptosis-initiation of human gastric cancer (MGC-803) cells. The time point of apoptosis-initiation induced by 5-fliorouracil in MGC-803 cells was determinated using 5-fliorouracil-withdrawal. Two-dimensional electrophoreses (2-DE) were employed to compare the differentials of protein expressions of the MGC-803 cells at the apoptosis-initiation phase and those of the MGC-803 cells untreated with 5-fluorouracil. The differential proteins included 14 upregulated proteins and 8 downregulated proteins. They indicated a more-than-doubled alteration. These proteins were digested in gels by trypsin and the mass of generated peptides were measured by matrix assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOFMS). The data obtained from peptide mass fingerprinting (PMF) were searched out using the internet available database mascot (http://www.matrixscience.com). The results showed that proteomics analyses have evidenced that many kinds of proteins are involved in the apoptosis initiation of human gastric cancer MGC-803 cells. These proteins are related to metabolism, oxidation, cytoskeleton and signal transduction and other aspects of cells. In conclusion, the experiment model of apoptosis-initiation of human gastric cancer MGC-803 cells induced by 5-fluorouracil based on proteomic analysis has been established, giving an impetus to researches of the mechanism of apoptosis in human gastric cancer, and laying a foundation for the selection of potential drug precursors specific for inducing apoptosis-initiation in human gastric cancer.

並列關鍵字

human gastric cancer cell lines ； apoptosis initiation ； proteomics ； 5-fliorouracil

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