PLASMID FOR EXPRESSION OF APOPTIN IN <i>Escherichia coli</i>

Abstract

The chicken anemia virus (CAV) Apoptin can induce apoptosis specifically in tumor cells and not in normal cells. Therefore, this shows a promising use for cancer gene therapy in the future. However, the mechanism of apoptin-induced apoptosis in tumor cells has not been well characterized. We tried to construct p-Ec-Apo (Apoptin expression plasmid for Escherichia coli) for further use, especially to explore the molecular aspect and therapeutically strategy of Apoptin. Aim of this study is to construct plasmid for expression of Apoptin in Escherichia coli. A complete open reading frame of the Apoptin gene of CAV/wild type was amplified by PCR. The PCR product was then purified from the agarose using QIAquick Gel Extraction Kit (Qiagen), subcloned into the respective sites of pETBlue-1 (Novagen). The molecular clone was transformed into Escherichia coli, purified, and sequenced. The nucleotide sequence was analyzed by CLC Main Workbench (CLC Bio). Results: The clone thus obtained, p-Ec-Apo, was successfully constructed.


Keywords: Apoptin, Escherichia coli

References
Lee, M.S., F.C. Sun, C.H. Huang, Y.Y. Lien, S.H. Feng, G.H. Lai, M.S. Lee, J. Chao, H.J. Chen, J.T. Tzen, and H.Y. Cheng. 2012. Efficient production of an engineered apoptin from chicken anemia virus in a recombinant E. coli for tumor therapeutic applications. BMC Biotechnol, vol. 12:27.
Li, Q., H. Zhang, C. Tan, W. Peng, G. Ren, B. Jia, Y. He, P. Wang, X. Zhou, and T. Xiang. 2013. AdHu5-apoptin induces G2/M arrest and apoptosis in p53-mutated human gastric cancer SGC-7901 cells. Tumour Biol, 2013 Jun 28. [Epub ahead of print]
Ma, J.L., S.X. Han, J. Zhao, D. Zhang, L. Wang, Y.D. Li, and Q. Zhu. 2012. Systemic delivery of lentivirus-mediated secretable TAT-apoptin eradicates hepatocellular carcinoma xenografts in nude mice. Int J Oncol, vol. 41:1013-1020.
Peng, C., P. Yang, Y. Cui, M. He, L. Liang, and Y. Di. 2013. HSPA9 overexpression inhibits apoptin-induced apoptosis in the HepG2 cell line. Oncol Rep, vol. 29:2431-2437.
Prasetyo, A.A., T. Kamahora, A. Kuroishi, K. Murakami, and S. Hino. 2009. Replication of chicken anemia virus (CAV) requires apoptin and is complemented by VP3 of human torque teno virus (TTV). Virology, vol. 385:85-92.
Wang, C., W. Wang, J. Wang, H. Zhan, L. Jiang, R. Yan, Z. Hou, H. Zhu, L. Yu, Y. Shi, M. Ding, and C. Ke. 2013. Apoptin induces apoptosis in nude mice allograft model of human bladder cancer by altering multiple bladder tumor-associated gene expression profiles. Tumour Biol, vol. 34:1667-1678.
Zhan, H., J.S. Wang, H.F. Wang, Y.G. Zuo, C.H. Wang, and M.X. Ding. 2012. Apoptin induces apoptosis in human bladder cancer EJ and BIU-87 cells. Asian Pac J Cancer Prev. vol. 13:135-138.
Zhao, J., S.X. Han, J.L. Ma, X. Ying, P. Liu, J. Li, L. Wang, Y. Zhang, J. Ma, L. Zhang, and Q. Zhu. 2013. The role of CDK1 in apoptin-induced apoptosis in hepatocellular carcinoma cells. Oncol Rep, vol. 30:253-259.