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Two antagonistic microtubule targeting drugs act synergistically to kill cancer cells

AuthorsPeronne, Lauralie; Denarier, Eric; Rai, Ankit; Prudent, Renaud; Vernet, Audrey; Suzanne, Peggy; Ramirez-Rios, Sacnicté; Michallet, Sophie; Guidetti, Mélanie; Vollaire, Julien; Lucena-Agell, Daniel ; Ribba, Anne-Sophie; Josserand, Véronique; Coll, Jean-Luc; Dallemagne, Patrick; Díaz, J. Fernando; Oliva, María A. ; Sadoul, Karin; Akhmanova, Anna; Andrieux, Annie; Lafanechère, Laurence
Keywordscancer therapy
drug synergy
Issue Date6-Aug-2020
PublisherMultidisciplinary Digital Publishing Institute
CitationCancers 12(8): 2196 (2020)
AbstractPaclitaxel is a microtubule stabilizing agent and a successful drug for cancer chemotherapy inducing, however, adverse effects. To reduce the effective dose of paclitaxel, we searched for pharmaceutics which could potentiate its therapeutic effect. We screened a chemical library and selected Carba1, a carbazole, which exerts synergistic cytotoxic effects on tumor cells grown in vitro, when co-administrated with a low dose of paclitaxel. Carba1 targets the colchicine binding-site of tubulin and is a microtubule-destabilizing agent. Catastrophe induction by Carba1 promotes paclitaxel binding to microtubule ends, providing a mechanistic explanation of the observed synergy. The synergistic effect of Carba1 with paclitaxel on tumor cell viability was also observed in vivo in xenografted mice. Thus, a new mechanism favoring paclitaxel binding to dynamic microtubules can be transposed to in vivo mouse cancer treatments, paving the way for new therapeutic strategies combining low doses of microtubule targeting agents with opposite mechanisms of action.
Publisher version (URL)https://doi.org/10.3390/cancers12082196
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