Discovery of Facile Amides-functionalized Rhodanine-3-acetic Acid Derivatives As Potential Anticancer Agents by Disrupting Microtubule Dynamics
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Microtubule dynamics are crucial for multiple cell functions, and cancer cells are particularly sensitive to microtubule-modulating agents. Here, we describe the design and synthesis of a series of ()-2-(5-benzylidene-4-oxo-2-thioxothiazolidin-3-yl)--phenylacetamide derivatives and evaluation of their microtubule-modulating and anticancer activities . Proliferation assays identified as the most potent of the antiproliferative compounds, with 50% inhibitory concentrations ranging from 7.0 to 20.3 µM with A549, PC-3, and HepG2 human cancer cell lines. Compound also disrupted cancer A549 cell migration in a concentration-dependent manner. Immunofluorescence microscopy, transmission electron microscopy, and tubulin polymerisation assays suggested that compound promoted protofilament assembly. In support of this possibility, computational docking studies revealed a strong interaction between compound and tubulin Arg 369, which is also the binding site for the anticancer drug Taxol. Our results suggest that ()-2-(5-benzylidene-4-oxo-2-thioxothiazolidin-3-yl)--phenylacetamide derivatives could have utility for the development of microtubule-stabilising therapeutic agents.
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