Journal
ANTI-CANCER DRUGS
Volume 24, Issue 9, Pages 911-919Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/CAD.0b013e3283648c69
Keywords
albendazole; flubendazole; intestinal cancer cells; microtubules; paclitaxel
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Funding
- Ministry of Education, Czech Republic [SVV267 004]
- programme PRVOUK [P37/01]
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This study aimed to test the antiproliferative effect of three benzimidazole anthelmintics in intestinal cancer cells and to investigate whether these drugs, which inhibit tubulin polymerization, can potentiate the efficacy of the microtubule-stabilizing drug paclitaxel (PTX). Four intestinal cancer cell lines, SW480, SW620, HCT8, and Caco2, with different origins and growth characteristics were used. The antiproliferative effect of albendazole (ABZ), ricobendazole (RBZ), flubendazole (FLU), and their combinations with PTX was tested using three different end-point viability assays, cell cycle distribution analysis, and the x-CELLigence System for real-time cell analysis. ABZ and FLU inhibited cell proliferation significantly in a concentration-dependent and time-dependent manner through cell arrest in the G2/M phase. RBZ was not effective at any concentration tested. The cell lines differed in sensitivity to FLU and ABZ, with HCT8 being the most sensitive, showing IC50 values for ABZ and FLU that reached 0.3 and 0.9 mol/l, respectively. Combinations of PTX+ABZ and PTX+FLU decreased cell viability more effectively when compared with treatment with individual drugs alone. The anthelmintic benzimidazole drugs ABZ and FLU show a significant cytostatic effect and potentiate the efficacy of PTX in intestinal cancer cells.
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