构建HSA-PEI-pcDNA-Apoptin复合物及对乳腺癌细胞增殖的影响

BACKGROUND: Apoptin is known to induce apoptosis of more than 50 kinds of tumor cells. However, efficient systems are required to deliver apoptin to the cancer cells for clinical use. OBJECTIVE: To construct human serum albumin (HSA) and Apoptin complex and transfect it to cancer cells in vitro and in vivo so as to find an efficient approach for apoptin delivery. METHODS: Polyethylenimine was used to react with N-hydroxysuccinimide (NHS)-HSA solution to synthesized HSA-PEI, and then react with pcDNA-Apoptin to construct recombinant HSA-PEI-pcDNA-Apoptin. HSA-PEI-pcDNA-Apoptin complex was transformed into MCF-7 breast cancer cell lines. Then the expression of apoptin was detected by western blot assay and the cell proliferation was detected by MTT assay and flow cytometry. The MCF-7 breast cancer cell xenograft model was used to detect the in vivo performance of HSA-PEI-pcDNA-Apoptin by measuring the tumor volume at 4 weeks, with saline and HSA-PEI-pcDNA as controls. RESULTS AND CONCLUSION: (1) We successfully prepared and confirmed the construction of HSA-PEI-pcDNA-Apoptin complex, which was successfully transformed into MCF-7 cells. (2) MCF-7 cells could express apoptin in the HSA-PEI-pcDNA-Apoptin group at 24 hours, but neither HSA-PEI-pcDNA group nor blank control group could express apoptin. (3) MTT assay for cell viability showed that HSA-PEI-pcDNA-Apoptin group had significantly lower optical density value than that in the other two groups (P < 0.05). (4) The tumor volume in the HSA-PEI-pcDNA-Apoptin group was significantly less than that in the other two groups (P < 0.05). (5) These findings indicate that the HSA-PEI-pcDNA-Apoptin complex markedly inhibits tumor growth in vitro and in vivo. 中国组织工程研究杂志出版内容重点：肾移植；肝移植；移植；心脏移植；组织移植；皮肤移植；皮瓣移植；血管移植；器官移植；组织工程

Preparation of HSA-PEI-pcDNA-Apoptin and its effect on the proliferation of breast cancer MCF-7 cells