Anticancer activity of PDSS2, prenyl diphosphate synthase, subunit 2, in gastric cancer tissue and the SGC7901 cell line

The aim of this study was to assess whether PDSS2 (prenyl diphosphate synthase, subunit 2), a candidate tumor suppressor protein, has a potential anticancer role in human gastric cancer tissue and the SGC7901 gastric cell line. A PDSS2 eukaryotic expression vector was constructed and introduced into SGC7901 cells. The relationship between PDSS2 expression and cell proliferation, cell cycle distribution, and apoptosis in tumor cells was analyzed by RT-PCR, western blotting, the MTT colorimetric assay, flow cytometry, and immunohistochemistry. Increased exogenous PDSS2 expression in vitro is associated with decreased cellular proliferation of the gastric cancer cell line SGC7901. PDSS2 also induced apoptosis in SGC7901 cells by causing cell cycle arrest in the G0/G1 phase. Moreover, a significantly low expression level of PDSS2 protein was found in gastric cancer. Decreased or absent expression of PDSS2 was showed in the gastric tumor biopsy samples analyzed, correlating with cancer differentiation. PDSS2 has potent anticancer activity in gastric cancer tissues and the SGC7901 cell line and is possibly involved in apoptosis in SGC7901 cells.