Erschienen in:
01.11.2009
Transfer of Her-2/neu Specificity into Cytokine-Induced Killer (CIK) Cells with RNA Encoding Chimeric Immune Receptor (CIR)
verfasst von:
Sung Hee Yoon, Jin Myung Lee, Sun-Je Woo, Min-Ji Park, Jung-Sun Park, Hye-Sung Kim, Mi-Young Park, Hyun-Jung Sohn, Tai-Gyu Kim
Erschienen in:
Journal of Clinical Immunology
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Ausgabe 6/2009
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Abstract
Background
Efficient RNA transfer to dendritic cell and T cells by electroporation have been successfully applied for immunotherapy. Herein, RNA electroporation was used to transfer antigen-specific receptor (scFv) gene to cytokine-induced killer cells (CIK).
Methods
CIK was generated from peripheral blood mononuclear cells with anti-CD3 antibody, interleukin-2, and interferon (IFN)-γ for 14 days and showed typical characteristics of CIK expressing both CD3+ and CD56+ markers and NKG2D+. CIK could lyse K562 cells, but not SKOV3 and MCF7/Her-2/neu.
Results
After RNA encoding anti-Her-2/neu chimeric immune receptor (CIR) with signaling portion of CD28 and CD3ζ was electroporated to CIK, more than 95% of CIK expressed anti-Her-2/neu CIR (CIR-CIK). CIR-CIK was able to produce cytokines including IFN-γ, granulocyte-macrophage colony-stimulating factor, and tumor necrosis factor-α, and show cytotoxicity specific to tumor cell lines expressing Her-2/neu, SKOV3, and MCF7/Her-2/neu. Adoptive transfer of CIR-CIK in SKOV3 xenograft nude mice model led to significant inhibition of tumor growth compared with transfer of mock-transduced CIK and showed higher inhibition than that of Herceptin, humanized monoclonal antibody specific for Her-2/neu. These results suggest that RNA transfer is the convenient and efficient strategy to introduce antigen-specificity into CIK and provide potential therapeutic value of CIR-CIK in the treatment of tumors.