2026-09-16T01:53:24Zhttps://gredos.usal.es/oai/request

oai:gredos.usal.es:10366/1595392025-04-30T19:31:40Zcom_10366_149436com_10366_3947com_10366_3946com_10366_3823col_10366_151253

González, Myriam Ellahioui, Younes Gallego, Laura Vicente Blázquez, Alba Alvarez, Raquel Medarde Agustín, Manuel Peláez Lamamie de C. Arroyo, Rafael 2024-09-13T06:41:46Z 2024-09-13T06:41:46Z 2023 González, M., Ellahioui, Y., Gallego, L., Vicente-Blázquez, A., Álvarez, R., Medarde, M., & Peláez, R. (2023). Novel amino analogs of the trimethoxyphenyl ring in potent colchicine site ligands improve solubility by the masked polar group incorporation (MPGI) strategy. Bioorganic Chemistry, 131, 106282. https://doi.org/10.1016/j.bioorg.2022.106282 http://hdl.handle.net/10366/159539 10.1016/j.bioorg.2022.106282 [EN] The low aqueous solubility of colchicine site antimitotic agents, of which the trimethoxyphenyl (A ring) is a heavy contributor, is a serious drawback in their clinical development. We have designed new A ring analogs with chameleonic masked polar amino groups able to increase aqueous solubility and also behave as non-polar through intramolecular hydrogen bonds when bound to tubulin. We have incorporated these new A rings in several scaffolds (sulfonamides, combretastatins, phenstatins, isocombretastatins), synthesized, and assayed 43 representatives. The amino analogs show improved aqueous solubility and some of them (8, 60Z, and 67) nanomolar anti-proliferative potencies against human cancer cell lines, with the most favorable substituent being a 3-methylamino group. The antiproliferative effect relates to tubulin inhibition as shown by in vitro tubulin polymerization inhibition, immunofluorescence microscopy, and cell cycle and apoptosis analysis by flow cytometry. The compounds arrest the cell cycle of treated cells in G2/M and later develop an apoptotic response. Docking studies suggested binding at the colchicine site of tubulin with good agreement with the DFT models of the new structural variations made. The 3-methylamino-4,5‑dimethoxyphenyl moiety is an example of the masked polar group incorporation (MPGI) strategy for soluble ligands binding to hydrophobic sites and a good trimethoxyphenyl ring replacement for the development of new colchicine site ligands. eng http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional Amino substituents Tubulin Solubility Antimitotic Apoptosis Colchicine site Novel amino analogs of the trimethoxyphenyl ring in potent colchicine site ligands improve solubility by the masked polar group incorporation (MPGI) strategy info:eu-repo/semantics/article