Enhanced anti-tumor immunity against breast cancer induced by whole tumor cell vaccines genetically modified expressing α-Gal epitopes

  • Authors:
    • Dabing Xue
    • Ying Liang
    • Siliang Duan
    • Jian He
    • Jing Su
    • Jianmeng Zhu
    • Nan Hu
    • Jianming Liu
    • Yongxiang Zhao
    • Xiaoling Lu
  • View Affiliations

  • Published online on: September 23, 2016     https://doi.org/10.3892/or.2016.5128
  • Pages: 2843-2851
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Abstract

Whole tumor cell vaccines have shown much promise, but demonstrated poor efficiency in phase III trials. In this study, we modified MDA-MB‑231 tumor cells (MDA-MB‑231Gal+) to express α-1, 3-galactosyltransferase (α-1, 3-GT) protein, to potentially enhance antitumor effect of whole tumor cell vaccines. MDA-MB‑231 tumor cell vaccines were transfected with a reconstructed lentiviral containing α-1, 3-GT genes. Tumor growth, tumorigenesis and survival of Hu-NOD-SCID mice were observed when tumor-bearing mice were injected with tumor cell vaccines. Proliferation and apoptosis in MDA-MB‑231 tumor xenografts were observed by immunohistochemistry. The levels of cytokine secretion in the serum of mice were tested by ELISA. CD8+ T cells infiltrating tumors were assessed by flow cytometry. MDA-MB‑231Gal+ cells expressed active α-1, 3-GT and produced α-Gal in vitro. MDA-MB‑231Gal+ cell vaccines suppressed tumor growth and tumorigenesis in immunized Hu-NOD-SCID mice. Additionally, decrease of TGF-β, IL-10 and increase of INF-γ, IL-12 were observed in tumor cell vaccinated mice. Furthermore, the cell vaccines enhanced infiltration of cytotoxic CD8+ T cells in the tumor microenvironment of immunized mice. The MDA-MB‑231Gal+ cell vaccines modified α-1, 3-GT genes improved the antitumor effect.
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November-2016
Volume 36 Issue 5

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Spandidos Publications style
Xue D, Liang Y, Duan S, He J, Su J, Zhu J, Hu N, Liu J, Zhao Y, Lu X, Lu X, et al: Enhanced anti-tumor immunity against breast cancer induced by whole tumor cell vaccines genetically modified expressing α-Gal epitopes. Oncol Rep 36: 2843-2851, 2016
APA
Xue, D., Liang, Y., Duan, S., He, J., Su, J., Zhu, J. ... Lu, X. (2016). Enhanced anti-tumor immunity against breast cancer induced by whole tumor cell vaccines genetically modified expressing α-Gal epitopes. Oncology Reports, 36, 2843-2851. https://doi.org/10.3892/or.2016.5128
MLA
Xue, D., Liang, Y., Duan, S., He, J., Su, J., Zhu, J., Hu, N., Liu, J., Zhao, Y., Lu, X."Enhanced anti-tumor immunity against breast cancer induced by whole tumor cell vaccines genetically modified expressing α-Gal epitopes". Oncology Reports 36.5 (2016): 2843-2851.
Chicago
Xue, D., Liang, Y., Duan, S., He, J., Su, J., Zhu, J., Hu, N., Liu, J., Zhao, Y., Lu, X."Enhanced anti-tumor immunity against breast cancer induced by whole tumor cell vaccines genetically modified expressing α-Gal epitopes". Oncology Reports 36, no. 5 (2016): 2843-2851. https://doi.org/10.3892/or.2016.5128