Objective:To observe the expression of VEGF-C protein in human gastric cancer cells SGC-7901 those transfected by pCI-neo-antisense VEGF-C and investigate whether antisense VEGF-C gene could inhibit the growth of human gastric carcinoma cell line in vitro.Methods:By the liposome infection protocol

We transfected two different plasmids including pCI-neo and pCI-neo antisense VEGF-C into human gastric cancer cell line SGC-7901 cultured in vitro.Then those resistant clones were selected by G418 and expanded in DMEM culture medium.Then we used Immunohistochemical method and Western-blot to detect target genes and its expression.The cell viability was detected by MTT assay.We took the untransfected group as the control.Results:The immunohistochemical method and Western-blot showed that there were no expression of VEGF-C mRNA and its protein in the group that transfected by plasmid pCI-neo antisense VEGF-C.MTT assay showed that the group of transfected with antisense VEGF-C had a lower cell viability than other groups(P<0.05).Conclusion:The target genes were successfully transfected and the expression of VEGF-C mRNA and its protein in SGC-7901 cells could be inhibited by pCI-neo-antisense VEGF-C.The study also showed that antisense VEGF-C gene could suppress the growth of human gastric cells in vitro.These results created the condition for further study of the biologic functions of VEGF-C and gene therapy for gastria carcinoma.