Abstract
It has been previously found that local administration of Balb/c plasmacytoma cells transformed and made non-tumorigenic by insertion of the cloned murine interleukin-2 (IL-2) gene induced regressions of a variety of murine tumours including the original Balb/c plasmacytoma X63-Ag8.653 growing in syngeneic mice. The tumour-inhibitory effect of the plasmacytoma cells transformed by IL-2 cDNA and designated as X63-m-IL-2 was due to their high constitutive production of IL-2. Here we show that admixture of syngeneic spleen cells to the X63-m-IL-2 transformants substantially (P<0.025) increased the antitumour efficacy of the transformants. Balb/c spleen cells co-cultivated with X63-m-IL-2 cells in vitro yielded predominantly Thy 1.2+, CD3+, LFA-1+ lymphocytes, cytolytic for the X63-Ag8.653 plasmacytoma as well as for other murine tumours, including the X63-m-IL-2 target cells.
Abbreviations
- IL-2:
-
interleukin-2
- LAK:
-
lymphokine-activated killer
- NK:
-
natural killer
- HPRT:
-
hypoxanthine phosphoribosyl transferase
- HAT:
-
hypoxanthine/aminopterin/thymidine
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Bubeník, J., Šímová, J., Bubeníková, D. et al. Utilization of interleukin-2 gene transfer in local immunotherapy of cancer. J Cancer Res Clin Oncol 119, 253–256 (1993). https://doi.org/10.1007/BF01212720
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DOI: https://doi.org/10.1007/BF01212720