Immunotherapy of Cancer—A Historical Note

Istvan  Berczi

doi:10.4236/jct.2014.513120

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JCT Vol.5 No.13 , November 2014

Immunotherapy of Cancer—A Historical Note

Istvan Berczi^1,2

Abstract: We examined the possibility that the anti-estrogens, tamoxifen (TX) and toremifen (TO) interacted with the immune system. Indeed, both TX and TO stimulated cells mediated cytotoxicity reactions by various killer cells: killer T (TK), natural killer (NK), lymphokine activated killer (LAK) cells. Both TX and TO inhibited the growth of tumors that express estrogen receptors. Thus these antiestrogens inhibited tumor growth and stimulated killer cells for cytotoxicty on such tumors. Therefore these agents were presumed to stimulate tumor immunity. We tested the P815 mouse mastcytoma with TK, LK, and TX or TO. A therapeutic effect was observed in both experiments. The SL2-5 murine lymphoma was tested with NK and TX cells or TO cells and successful immunotherapy was observed. We digested human breast carcinomas and lung tumors with collagenase. The killer cells were separated from tumor cells on Ficoll gradients. TX and TO enhanced the cytotoxic effect of autologous killer cells on the corresponding tumor cells. This experiment indicates that the results obtained in animals are also valid for human malignant disease.

Keywords: Murine Tumors: P815 Masocytoma, SL2-5 Lymphoma, Human Cancers: Breast Carcinomas and Lung Carcinomas, Tamoxifen, Toremiphen, Thymus-Derived Lymphocytes, Killer T Cells (TK Cells), Natural Killer Cells (NK Cells), Lymhokine Activated Killer Cells (LAK Cells), Combination Immunotherapy of Cancer

Cite this paper: Berczi, I. (2014) Immunotherapy of Cancer—A Historical Note. Journal of Cancer Therapy, 5, 1186-1189. doi: 10.4236/jct.2014.513120.

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