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  • Title: Design, synthesis and biological evaluation of indole-based [1,2,4]triazolo[4,3-a] pyridine derivatives as novel microtubule polymerization inhibitors.
    Author: Wu CJ, Wu JQ, Hu Y, Pu S, Lin Y, Zeng Z, Hu J, Chen WH.
    Journal: Eur J Med Chem; 2021 Nov 05; 223():113629. PubMed ID: 34175541.
    Abstract:
    A series of indole-based [1,2,4]triazolo [4,3-a]pyridine derivatives was designed and synthesized as novel microtubulin polymerization inhibitors by using a conformational restriction strategy. These compounds exhibited moderate to potent anti-proliferative activities against a panel of cancer cell lines (HeLa, A549, MCF-7 and HCT116). Among them, compound 12d featuring a N-methyl-5-indolyl substituent at the C-6 position of the [1,2,4]triazolo [4,3-a]pyridine core exhibited the highest antiproliferative activity with the IC50 values ranging from 15 to 69 nM, and remarkable inhibitory effect on tubulin polymerization with an IC50 value of 1.64 μM. Mechanistic studies revealed that compound 12d induced cellular apoptosis and cell cycle arrest at the G2/M phase in a dose-dependent fashion. Moreover, compound 12d significantly suppressed wound closure and disturbed microtubule networks.
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