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Article

Construction of a novel oncolytic adenoviral vector and its biological characteristics

  • Authors:
    • Mingzhi Zhang
    • Xudong Zhang
    • Zhiqiang Han
    • Xinfeng Chen
    • Li Yang
    • Yuqiao Sheng
    • Jianguo Wen
  • View Affiliations / Copyright

    Affiliations: Oncology Department of the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, P.R. China, Medical College of Zhengzhou University, Zhengzhou 450000, P.R. China, Institute of Clinical Medicine of the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, P.R. China
  • Pages: 798-804
    |
    Published online on: November 15, 2012
       https://doi.org/10.3892/or.2012.2140
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Abstract

In this study, we aimed to construct an effective and safe oncolytic adenoviral vector for cancer treatment with gene therapy. First, the promoter of the catalytic subunit of human telomerase (hTERTp), adenovirus early region 1a gene (E1A) and thymidine kinase gene of human herpes virus type 1 (HSV-1-TK) were amplified by using PCR from genomic DNA of 293A cells and wild-type HSV-1 (wHSV-1). These specially-prepared elements were inserted into an adenoviral shuttle vector in the opposite and the same directions of left inverted terminal repeat (L-ITR), respectively, to construct pENTR-E1A-IRES-TK-hTERTp (pEITH) and pENTR-hTERTp-E1A-IRES-TK (pHEIT). LR reaction between adenoviral shuttle vectors (pEITH and pHEIT) and the backbone vector DEST was carried out to establish adenoviral expression vectors pAd-E1A-IRES-TK-hTERTp (pAd-EITH) and pAd-hTERTp-E1A-IRES-TK (pAd-HEIT). Recombinant adenovirus Ad-EITH and Ad-HEIT were produced by transfecting 293A cells and purified for the subsequent studies of titer measurement, replication capability with and without acyclovir (ACV) and antitumor ability with and without ganciclovir (GCV) to evaluate the biological characteristics. Adenoviral shuttle vectors pEITH and pHEIT and expression vectors pAd-EITH and pAd-HEIT were successfully constructed, and recombinant adenoviruses Ad-EITH and Ad-HEIT with high titer were produced. The results of replication and cytotoxicity assays showed that Ad-EITH and Ad-HEIT replicated in the hTERTp (+) human nasopharyngeal carcinoma cell line CNE and expressed the TK gene effectively leading to the death of tumor cells. In addition, there were still some Ad-HEIT particles replicating in the hTERTp (-) human osteosarcoma U-2OS cells and human lung HFL-1 fibroblasts compared to Ad-EITH which was hardly able to replicate in U-2OS and HFL-1 cells. In addition, we also observed an interesting phenomenon, that the replication of Ad-EITH could be inhibited by antiviral drug ACV on account of the expression of HSV-1-TK gene making Ad-EITH sensitive to ACV. In conclusion, a novel oncolytic adenoviral vector Ad-EITH was produced which can be used for cancer-specific and efficient viral replication, and its safety is potentially improved as replication can be inhibited by ACV in vitro.
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Copy and paste a formatted citation
Spandidos Publications style
Zhang M, Zhang X, Han Z, Chen X, Yang L, Sheng Y and Wen J: Construction of a novel oncolytic adenoviral vector and its biological characteristics. Oncol Rep 29: 798-804, 2013.
APA
Zhang, M., Zhang, X., Han, Z., Chen, X., Yang, L., Sheng, Y., & Wen, J. (2013). Construction of a novel oncolytic adenoviral vector and its biological characteristics. Oncology Reports, 29, 798-804. https://doi.org/10.3892/or.2012.2140
MLA
Zhang, M., Zhang, X., Han, Z., Chen, X., Yang, L., Sheng, Y., Wen, J."Construction of a novel oncolytic adenoviral vector and its biological characteristics". Oncology Reports 29.2 (2013): 798-804.
Chicago
Zhang, M., Zhang, X., Han, Z., Chen, X., Yang, L., Sheng, Y., Wen, J."Construction of a novel oncolytic adenoviral vector and its biological characteristics". Oncology Reports 29, no. 2 (2013): 798-804. https://doi.org/10.3892/or.2012.2140
Copy and paste a formatted citation
x
Spandidos Publications style
Zhang M, Zhang X, Han Z, Chen X, Yang L, Sheng Y and Wen J: Construction of a novel oncolytic adenoviral vector and its biological characteristics. Oncol Rep 29: 798-804, 2013.
APA
Zhang, M., Zhang, X., Han, Z., Chen, X., Yang, L., Sheng, Y., & Wen, J. (2013). Construction of a novel oncolytic adenoviral vector and its biological characteristics. Oncology Reports, 29, 798-804. https://doi.org/10.3892/or.2012.2140
MLA
Zhang, M., Zhang, X., Han, Z., Chen, X., Yang, L., Sheng, Y., Wen, J."Construction of a novel oncolytic adenoviral vector and its biological characteristics". Oncology Reports 29.2 (2013): 798-804.
Chicago
Zhang, M., Zhang, X., Han, Z., Chen, X., Yang, L., Sheng, Y., Wen, J."Construction of a novel oncolytic adenoviral vector and its biological characteristics". Oncology Reports 29, no. 2 (2013): 798-804. https://doi.org/10.3892/or.2012.2140
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