[Effect of cobalt chloride on S100A4 expression in human gastric cancer cell BGC823]

S100A4 is an important metastasis-associated gene. Researches have confirmed the close correlation between overexpression of S100A4 gene and gastric cancer's infiltration, lymph node metastasis and in vitro invasiveness of gastric cancer cells. In order to investigate the mechanism of overexpression of S100A4 gene, hypoxia mimetic cobalt chloride (CoCl2) was used to treat gastric cancer cell BGC823, and then the expression of S100A4 mRNA and protein in BGC823 cells were detected by RT-PCR, immunohistochemistry, immunofluorescence, and Western blotting analysis. After treatment with CoCl2, the expression of S100A4 mRNA and protein in BGC823 cell was increased. These results suggested that hypoxia mimetic cobalt chloride could increase the expression of S100A4 gene in gastric cancer cell BGC823.