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Título
The Masked Polar Group Incorporation (MPGI) Strategy in Drug Design: Effects of Nitrogen Substitutions on Combretastatin and Isocombretastatin Tubulin Inhibitors
Autor(es)
Materia
Tubulin
Colchicine-site
Combretastatins
Isocombretastatins
Phenstatins
Nitrogenated
Nitrogenated
Masked polar group introduction
Solubility
Cytotoxicity
Docking
Clasificación UNESCO
3209 Farmacología
2306 Química Orgánica
Fecha de publicación
2019
Editor
Molecules
Citación
González, M., Ellahioui, Y., Álvarez, R., Gallego-Yerga, L., Caballero, E., Vázquez-Blázquez, A., Ramudo, L., Marín Folgado, M., Sanz, C., Merdarme, M., & Pélaez, R. (2019). The Masked Polar Group Incorporation (MPGI) Strategy in Drug Design: Effects of Nitrogen Substitutions on Combretastatin and Isocombretastatin Tubulin Inhibitors. Moelcules, 24(23), 4319. https://doi.org/10.3390/molecules24234319
Resumen
[EN] Colchicine site ligands suffer from low aqueous solubility due to the highly hydrophobic nature of the binding site. A new strategy for increasing molecular polarity without exposing polar groups—termed masked polar group incorporation (MPGI)—was devised and applied to nitrogenated combretastatin analogues. Bulky ortho substituents to the pyridine nitrogen hinder it
from the hydrophobic pocket while increasing molecular polarity. The resulting analogues show improved aqueous solubilities and highly potent antiproliferative activity against several cancer cell lines of different origin. The more potent compounds showed moderate tubulin polymerization inhibitory activity, arrested the cell cycle of treated cells at the G2/M phase, and subsequently caused apoptotic cell death represented by the cells gathered at the subG0/G1 population after 48 h of treatment. Annexin V/Propidium Iodide (PI) double-positive cells observed after 72 h confirmed the induction of apoptosis. Docking studies suggest binding at the colchicine site of tubulin in a similar way as combretastatin A4, with the polar groups masked by the vicinal substituents. These results validate the proposed strategy for the design of colchicine site ligands and open a new road to
increasing the aqueous solubility of ligands binding in apolar environments.
URI
DOI
10.3390/molecules24234319
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