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Fei Gao, Yang-Lin Pan, Li-Jun Sun, Jie Liang, Kai-Chun Wu, Chinese PLA Institute of Gastroenterology, Xijing Hospital, Fourth Military Medical University, Xi'an 710033, Shanxi Province, China
Shu-Ren Ma, Center of Digestive Endoscopy, General Hosipital of Shenyang Military Command, Shenyang 110015, Liaoning Provinces China
Supported by National Natural Science Foundation of China, No.39870320.
Correspondence to: Kai-Chun Wu, Chinese PLA Institute of Gastroenterology, Xijing Hospital, Fourth Military Medical University, Xi'an 710033, Shanxi Province, China. kaicwu@fmmu.edu.cn
Received: January 17, 2005 Revised: February 11, 2005 Accepted: February 26, 2005 Published online: April 1, 2005
AIM: To establish and optimize the methods for proteome research, and to comparatively analyze the proteomes of human SGC7901-asCOX2 cells and SGC7901-pcDNA cells.
METHODS: A series of methods, including immobilized pH gradient two-dimensional polyacrylamide gel electrophoresis (2DE), silver staining, and Melanie 3 2-D analysis software, were used to analyze the difference of protein expression between SGC7901-asCOX2 cells and SGC7901-pcDNA cells.
RESULTS: The 2DE pattern with good resolution and reproducibility was obtained. After silver staining, the 2DE image was analyzed by Melanie 3 2-D software. The results showed that 6 protein spots were exclusively detected in SGC7901-pcDNA cells, and 4 spots were detected in SGC7901-asCOX2 cells. Compared to SGC7901-pcDNA cells, there were 10 protein spots downregulated in SGC7901-asCOX2, and 6 protein spots upregulated.
CONCLUSION: There is a significant difference between proteomes of human gastric SGC7901-asCOX2 cells and SGC7901-pcDNA cells.
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