RESUMO
<p><b>OBJECTIVE</b>To construct RegIα over-expression vector and to evaluate the effect of RegIα on the proliferation and apoptosis of gastric cancer MKN28 cells in vitro.</p><p><b>METHODS</b>Full sequence of RegIα cDNA was amplified from normal gastric tissue samples by RT-PCR and cloned into pIRES2-EGFP vector. RT-PCR and Western blot were performed to detect expression levels of RegIα in MKN28 cells. The effects of over-expression RegIα on cell proliferation was measured by MTT assay and apoptosis was detected by flow cytometry.</p><p><b>RESULT</b>RegIα cDNA over-expression vector of pIRES2-RegIα-EGFP was successfully constructed. The expressions of RegIα in MKN28 cells, including mRNA and protein levels, were significantly increased after stable transfection, which resulted in cell proliferation and anti-apoptotic effect induced by H(2)O(2).</p><p><b>CONCLUSION</b>The over-expression of RegIα can promote cell proliferation and reduce cell apoptosis when induced by H(2)O(2) in gastric cancer cells.</p>