Objective: To study the anti-tumor effect of Tetrandrine (Tet) combined with Nedaplatin (Nap) on the human liver cancer cell line 7402, and explore its mechanism.
Methods: Human liver cancer line 7402 was treated by Tet and Nap in various concentrations respectively or in combination in vitro,and then the cell growth was assayed by MTT method, periodic return changes were observed by aridine orange (AO)-/ethidiumbromide (EB) fluorescent staining, DNA gel eledtophoresis and flow cytometry, and the expression of apoptosis-related genes were analyzed by immunohistochemical staining method.
Results: Compared with Tet or Nap individual drug groups, Tet combined with Nap obviously increased the inhibitatory rate and apoptosis rate of the human liver cancer cell line 7402. The cell cycle distribution was altered and ratio of S phase and G2/M phase cell increased following the treatment with Tet combined with Nap, with Bcl-2 gene expression down-regulated, and BAX gene expression up-regulated.
Conclusion: Tet combined with Nap can obviously increase apoptosis-inducing effect, and its mechanism may be regulating cell cycle and increasing apoptosis-inducing effect which is regulated by several genes.