Induction of cytotoxic T lymphocytes against human cancer cell lines using dendritic cell-tumor cell hybrids generated by a newly developed electrofusion technique

  • Authors:
    • Kenichiro Imura
    • Yuji Ueda
    • Takashi Hayashi
    • Tsuyoshi Itoh
    • Keiji Shimizu
    • Hidemasa Tamai
    • Yutaro Yano
    • Kei Naito
    • Junji Kohara
    • Kazuki Nakane
    • Yuko Matsuura
    • Atsuko Takeda
    • Takahisa Takeda
    • Keiichi Kawai
    • Hisakazu Yamagishi
  • View Affiliations

  • Published online on: September 1, 2006     https://doi.org/10.3892/ijo.29.3.531
  • Pages: 531-539
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Abstract

Recently, dendritic cells (DCs) and DC-tumor cell hybrids (DC-tumor hybrids) have been used for cancer vaccine therapy in a clinical trial. DC-tumor hybrids combine the potent antigen-presenting capacity of DCs with the ability to present all tumor antigens expressed on tumor cells to T cells. We used DC-tumor hybrids as stimulator cells to induce tumor-specific cytotoxic T lymphocytes (CTLs) in vitro. DC-tumor hybrids were generated from human monocyte-derived DCs and human cancer-cell lines (GT3TKB, lung cancer; GCIY, gastric cancer) by our newly developed electrofusion technique, established and refined with the use of mouse cells. To evaluate the capacity of DC-tumor hybrids generated by our method to induce tumor antigen-specific CTLs, we performed a cytotoxic assay and an interferon-γ release assay using CD8-dominant effector lymphocytes induced by them. DC-tumor hybrids more effectively induced tumor-specific primary T-cell response than did stimulation with DCs co-cultured with irradiated tumor cells overnight, irradiated tumor cells alone, or a mixture of DCs and irradiated tumor cells. DC-tumor hybrids were generated at a high fusion rate by our electrofusion technique. When CTLs were induced by DC-tumor hybrids in vitro, the high fusion rate did not contribute to the induction of CTLs with increased tumor-specific cytotoxicity. The addition of interleukin-12 to the culture medium did not augment the cytotoxicity of CTLs. Overall, our results suggest that DC-tumor hybrids effectively induce human tumor-specific CTLs and may thus be applicable for clinical trials of adoptive immunotherapy.

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September 2006
Volume 29 Issue 3

Print ISSN: 1019-6439
Online ISSN:1791-2423

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APA
Imura, K., Ueda, Y., Hayashi, T., Itoh, T., Shimizu, K., Tamai, H. ... Yamagishi, H. (2006). Induction of cytotoxic T lymphocytes against human cancer cell lines using dendritic cell-tumor cell hybrids generated by a newly developed electrofusion technique. International Journal of Oncology, 29, 531-539. https://doi.org/10.3892/ijo.29.3.531
MLA
Imura, K., Ueda, Y., Hayashi, T., Itoh, T., Shimizu, K., Tamai, H., Yano, Y., Naito, K., Kohara, J., Nakane, K., Matsuura, Y., Takeda, A., Takeda, T., Kawai, K., Yamagishi, H."Induction of cytotoxic T lymphocytes against human cancer cell lines using dendritic cell-tumor cell hybrids generated by a newly developed electrofusion technique". International Journal of Oncology 29.3 (2006): 531-539.
Chicago
Imura, K., Ueda, Y., Hayashi, T., Itoh, T., Shimizu, K., Tamai, H., Yano, Y., Naito, K., Kohara, J., Nakane, K., Matsuura, Y., Takeda, A., Takeda, T., Kawai, K., Yamagishi, H."Induction of cytotoxic T lymphocytes against human cancer cell lines using dendritic cell-tumor cell hybrids generated by a newly developed electrofusion technique". International Journal of Oncology 29, no. 3 (2006): 531-539. https://doi.org/10.3892/ijo.29.3.531