Analysis of variabilities of serum proteomic spectra in patients with gastric cancer before and after operation

Table 1 Seven over-expressed proteins in gastric cancer

Protein No.	Average molecular weight (kDa)	Protein identified
1	22.33	Heat shock protein 27
2	22.59	Transgelin
3	28.42	Glucose-regulated protein
4	29.90	Prohibitin
5	35.72	NSP3
6	42.46	Unnamed protein product
7	56.77	Protein disulfide isomerase A3

Table 2 Seven under-expressed proteins in gastric cancer

Protein No.	Average molecular weight (kDa)	Protein identified
1	17.16	P20
2	22.02	Nucleoside diphosphate isomerase A
3	30.77	Apolipoprotein A-1
4	46.73	Alpha 1 antitrypsin
5	53.40	Desmin
6	70.07	Serotransferrin
7	80.02	Serum albumin

Table 3 Variabilities of gastric cancer serum over-expressed proteins before and after operation

Proteins	Molecular weight (kDa)	Expression preoperation	Expression postoperation
Heat shock protein 27	22.33	Over-expresseda	Normalc
Transgelin	22.59	Over-expresseda	Over-expresseda
Glucose- regulated protein	28.42	Over-expresseda	Normalc
Prohibitin	29.90	Over-expresseda	Normalc
NSP3	35.72	Over-expresseda	Over-expresseda
Unnamed protein product	42.46	Over-expresseda	Normalc
Protein disulfide isomerase A3	56.77	Over-expresseda	Normalc

^aP < 0.05 vs control group;

^cP < 0.05 vs preoperative group.