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Article

Recombinant attenuated Salmonella typhimurium carrying a plasmid co-expressing ENDO-VEGI151 and survivin siRNA inhibits the growth of breast cancer in vivo

  • Authors:
    • Zhe Li
    • Pei-Hao Yin
    • Sheng-Sheng Yang
    • Qian-Yu Li
    • Tao Chang
    • Lin Fang
    • Lin-Xiang Shi
    • Guo-En Fang
  • View Affiliations / Copyright

    Affiliations: Department of Thyroid and Breast Surgery, The Shanghai Tenth People's Hospital, Tong Ji University, Shanghai 200072, P.R. China, Department of General Surgery, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200062, P.R. China, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai 200433, P.R. China , Department of Pathology, The Shanghai Tenth People's Hospital, Tong Ji University, Shanghai 200072, P.R. China, Department of General Surgery of Changhai Hospital, Second Military Medical University, Shanghai 200433, P.R. China
  • Pages: 1215-1222
    |
    Published online on: February 5, 2013
       https://doi.org/10.3892/mmr.2013.1308
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Abstract

The aim of this study was to investigate the antitumor effect of a plasmid co-expressing ENDO-VEGI151 and survivin siRNA on breast cancer in nude mice, and to explore the feasibility of attenuated Salmonella typhimurium (S. typhimurium) as a delivery vector for cancer gene therapy in vivo. Three recombinant expression plasmids pENDO‑VEGI151 (pEV), pSurvivin-siRNA (psi-survivin) and co-expressing plasmid pENDO-VEGI151/survivin‑siRNA (pEV/si-survivin), were transferred into the attenuated S. typhimurium strain SL7207, respectively. MDA-MB-231 cells were infected with these recombinants in vitro, and the expression of ENDO-VEGI151 and survivin was detected. In order to detect S. typhimurium distribution and gene delivery efficiency in vivo, the plasmid pEGFP-N1 which encodes green fluorescent protein was transferred into SL7207, and the recombinant known as SL-pEGFP was orally administered to tumor-bearing nude mice. The gene transfer efficiency, distribution and survival time of the SL-pEGFP in vivo were evaluated by detection of GFP fluorescence. SL-pEGFP not only infected the cancer cells effectively, but also allowed the survival and expression of specific genes mainly in the xenografts of nude mice. To further identify the anticancer effects of these recombinants in vivo, mice burdened with xenografts were randomly divided into 6 groups, which were subjected to intragastric administration of vehicle, SL7207, SL-pcDNA3.1, SL-pEV, SL-psi-survivin and SL-pEV/si-survivin, respectively. Eight weeks after implantation, tumor size, weight, inhibition rate, intratumoral microvessel density (MVD), apoptotic index (AI), ENDO‑VEGI151 and survivin expression were evaluated. Compared with the SL-pEV or SL-psi-survivin-treated groups, the growth of tumors was significantly reduced in the SL-pEV/si-survivin group with an inhibition rate of 90.28 vs. 69.12 and 65.61%, respectively. MVD and the expression of survivin were decreased significantly in the SL-pEV/si-survivin-treated group, while AI increased significantly in the SL-pEV/si-survivin-treated group. These results indicated that attenuated S. typhimurium carrying the dual function plasmid pEV/si-survivin cannot only be specifically enriched in the tumor tissue, but also showed a synergistic antitumor effect in vivo.
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Copy and paste a formatted citation
Spandidos Publications style
Li Z, Yin P, Yang S, Li Q, Chang T, Fang L, Shi L and Fang G: Recombinant attenuated Salmonella typhimurium carrying a plasmid co-expressing ENDO-VEGI151 and survivin siRNA inhibits the growth of breast cancer in vivo. Mol Med Rep 7: 1215-1222, 2013.
APA
Li, Z., Yin, P., Yang, S., Li, Q., Chang, T., Fang, L. ... Fang, G. (2013). Recombinant attenuated Salmonella typhimurium carrying a plasmid co-expressing ENDO-VEGI151 and survivin siRNA inhibits the growth of breast cancer in vivo. Molecular Medicine Reports, 7, 1215-1222. https://doi.org/10.3892/mmr.2013.1308
MLA
Li, Z., Yin, P., Yang, S., Li, Q., Chang, T., Fang, L., Shi, L., Fang, G."Recombinant attenuated Salmonella typhimurium carrying a plasmid co-expressing ENDO-VEGI151 and survivin siRNA inhibits the growth of breast cancer in vivo". Molecular Medicine Reports 7.4 (2013): 1215-1222.
Chicago
Li, Z., Yin, P., Yang, S., Li, Q., Chang, T., Fang, L., Shi, L., Fang, G."Recombinant attenuated Salmonella typhimurium carrying a plasmid co-expressing ENDO-VEGI151 and survivin siRNA inhibits the growth of breast cancer in vivo". Molecular Medicine Reports 7, no. 4 (2013): 1215-1222. https://doi.org/10.3892/mmr.2013.1308
Copy and paste a formatted citation
x
Spandidos Publications style
Li Z, Yin P, Yang S, Li Q, Chang T, Fang L, Shi L and Fang G: Recombinant attenuated Salmonella typhimurium carrying a plasmid co-expressing ENDO-VEGI151 and survivin siRNA inhibits the growth of breast cancer in vivo. Mol Med Rep 7: 1215-1222, 2013.
APA
Li, Z., Yin, P., Yang, S., Li, Q., Chang, T., Fang, L. ... Fang, G. (2013). Recombinant attenuated Salmonella typhimurium carrying a plasmid co-expressing ENDO-VEGI151 and survivin siRNA inhibits the growth of breast cancer in vivo. Molecular Medicine Reports, 7, 1215-1222. https://doi.org/10.3892/mmr.2013.1308
MLA
Li, Z., Yin, P., Yang, S., Li, Q., Chang, T., Fang, L., Shi, L., Fang, G."Recombinant attenuated Salmonella typhimurium carrying a plasmid co-expressing ENDO-VEGI151 and survivin siRNA inhibits the growth of breast cancer in vivo". Molecular Medicine Reports 7.4 (2013): 1215-1222.
Chicago
Li, Z., Yin, P., Yang, S., Li, Q., Chang, T., Fang, L., Shi, L., Fang, G."Recombinant attenuated Salmonella typhimurium carrying a plasmid co-expressing ENDO-VEGI151 and survivin siRNA inhibits the growth of breast cancer in vivo". Molecular Medicine Reports 7, no. 4 (2013): 1215-1222. https://doi.org/10.3892/mmr.2013.1308
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