Abstract
S100P has been shown to participate in processes of various human malignancies. In this study, we analyzed the tissue expression of S100P in gastric cancer and evaluated its significance. We determined the S100P expression in 156 gastric cancer patients by quantitative RT-PCR. Tumor characteristics and overall survival (OS) for each patient were examined. In vitro experiments were conducted to examine whether ectopic expression of S100P modifies the proliferation and drug resistance of gastric cancer cells. Higher expression of S100P occurred in human gastric cancer tissues in comparison with normal controls. Highly expressed S100P in gastric cancer was correlated with TNM stage and prognosis. The 5-year survival rate was significantly lower in patients with high levels of S100P expression than in patients with low levels of expression. Ectopic expression of S100P was associated with an increase in tumor cell proliferation and drug resistance. The expression of S100P in human gastric cancer tissues was upregulated in comparison with normal controls. By establishing an association between S100P expression and shortened OS, increase in proliferation and drug resistance, this study indicates that S100P may be a useful prognostic marker for gastric cancer patients.
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