Abstract
Effective adjunctive therapies for colorectal carcinoma are clearly needed. We evaluated the cytotoxic responses in vitro of human colon carcinoma cell lines to combined modalities: 5-fluorouracil/leucovorin (5-FU/LV), carboplatin (CP), tumor necrosis factor (TNF) and hyperthermia (HTX). Cytotoxicity was evaluated in a cell proliferation assay using crystal violet staining. 5-FU/LV was administered 2–3 days before TNF and CP, followed 1 h later by HTX. These cell lines were relatively resistant to HTX alone (42°C for 2 h), but were heterogeneous in their responses to various doses of the other single agents. This heterogeneity was also evident for combined modalities: the geneity was also evident for combined modalities: the HCT-15 cell line exhibited significant supra-additivity for selected doses of CP, TNF and 5-FU/LV, which was further enhanced by hyperthermia. In contrast, the HT-29 cell line did not demonstrate a strong pattern for supra-additivity, whereas the DLD-1 cell line had an intermediate response. Thus, our results suggest one approach to develop effective and dose-sparing multimodality therapeutic regimens for colon adenocarcinoma.
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Klostergaard, J., Leroux, M.E., Hsu, H.A. et al. Multi-chemothermoimmunotherapy for human colon adenocarcinoma in vitro. Cancer Chemother. Pharmacol. 37, 235–241 (1995). https://doi.org/10.1007/BF00688322
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DOI: https://doi.org/10.1007/BF00688322