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Article Open Access

'Obligate' anaerobic Salmonella strain YB1 suppresses liver tumor growth and metastasis in nude mice

  • Authors:
    • Chang‑Xian Li
    • Bin Yu
    • Lei Shi
    • Wei Geng
    • Qiu‑Bin Lin
    • Chang‑Chun Ling
    • Mei Yang
    • Kevin T. P. Ng
    • Jian‑Dong Huang
    • Kwan Man
  • View Affiliations / Copyright

    Affiliations: Department of Surgery and Centre for Cancer Research, University of Hong Kong, Hong Kong 999077, SAR, P.R. China, Department of Biochemistry and Shenzhen Institute of Research and Innovation, University of Hong Kong, Hong Kong 999077, SAR, P.R. China
    Copyright: © Li et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 177-183
    |
    Published online on: November 30, 2016
       https://doi.org/10.3892/ol.2016.5453
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Abstract

The antitumor properties of bacteria have been demonstrated over the past decades. However, the efficacy is limited and unclear. Furthermore, systemic infection remains a serious concern in bacteria treatment. In this study, the effect of YB1, a rationally designed ‘obligate’ anaerobic Salmonella typhimurium strain, on liver tumor growth and metastasis in a nude mouse orthotopic liver tumor model was investigated. The orthotopic liver tumor model was established in nude mice using the hepatocellular carcinoma cell line MHCC‑97L. Two weeks after orthotopic liver tumor implantation, YB1, SL7207 and saline were respectively administered through the tail vein of the mice. Longitudinal monitoring of tumor growth and metastasis was performed using Xenogen IVIS, and direct measurements of tumor volume were taken 3 weeks after treatment. In vitro, MHCC‑97L and PLC cells were incubated with YB1 or SL7207 under anaerobic conditions. YB1 was observed to invade tumor cells and induce tumor cell apoptosis and death. The results revealed that all mice in the YB1 group were alive 3 weeks after YB1 injection while all mice in the SL7207 group died within 11 days of the SL7207 injection. The body weight decreased by ~9% on day 1 after YB1 injection and but subsequently recovered. Liver tumor growth and metastases were significantly inhibited following YB1 treatment. By contrast to the control group, a large number of Gr1‑positive cells were detected on days 1 to 21 following YB1 treatment. Furthermore, YB1 also effectively invaded tumor cells and induced tumor cell apoptosis and death. In conclusion, YB1 suppressed liver tumor growth and metastasis in a nude mice liver tumor model. The potential mechanism may be through enhancing innate immune response and inducing tumor cell apoptosis and cell death.
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Copy and paste a formatted citation
Spandidos Publications style
Li CX, Yu B, Shi L, Geng W, Lin QB, Ling CC, Yang M, Ng KT, Huang JD, Man K, Man K, et al: 'Obligate' anaerobic Salmonella strain YB1 suppresses liver tumor growth and metastasis in nude mice. Oncol Lett 13: 177-183, 2017.
APA
Li, C., Yu, B., Shi, L., Geng, W., Lin, Q., Ling, C. ... Man, K. (2017). 'Obligate' anaerobic Salmonella strain YB1 suppresses liver tumor growth and metastasis in nude mice. Oncology Letters, 13, 177-183. https://doi.org/10.3892/ol.2016.5453
MLA
Li, C., Yu, B., Shi, L., Geng, W., Lin, Q., Ling, C., Yang, M., Ng, K. T., Huang, J., Man, K."'Obligate' anaerobic Salmonella strain YB1 suppresses liver tumor growth and metastasis in nude mice". Oncology Letters 13.1 (2017): 177-183.
Chicago
Li, C., Yu, B., Shi, L., Geng, W., Lin, Q., Ling, C., Yang, M., Ng, K. T., Huang, J., Man, K."'Obligate' anaerobic Salmonella strain YB1 suppresses liver tumor growth and metastasis in nude mice". Oncology Letters 13, no. 1 (2017): 177-183. https://doi.org/10.3892/ol.2016.5453
Copy and paste a formatted citation
x
Spandidos Publications style
Li CX, Yu B, Shi L, Geng W, Lin QB, Ling CC, Yang M, Ng KT, Huang JD, Man K, Man K, et al: 'Obligate' anaerobic Salmonella strain YB1 suppresses liver tumor growth and metastasis in nude mice. Oncol Lett 13: 177-183, 2017.
APA
Li, C., Yu, B., Shi, L., Geng, W., Lin, Q., Ling, C. ... Man, K. (2017). 'Obligate' anaerobic Salmonella strain YB1 suppresses liver tumor growth and metastasis in nude mice. Oncology Letters, 13, 177-183. https://doi.org/10.3892/ol.2016.5453
MLA
Li, C., Yu, B., Shi, L., Geng, W., Lin, Q., Ling, C., Yang, M., Ng, K. T., Huang, J., Man, K."'Obligate' anaerobic Salmonella strain YB1 suppresses liver tumor growth and metastasis in nude mice". Oncology Letters 13.1 (2017): 177-183.
Chicago
Li, C., Yu, B., Shi, L., Geng, W., Lin, Q., Ling, C., Yang, M., Ng, K. T., Huang, J., Man, K."'Obligate' anaerobic Salmonella strain YB1 suppresses liver tumor growth and metastasis in nude mice". Oncology Letters 13, no. 1 (2017): 177-183. https://doi.org/10.3892/ol.2016.5453
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