Natural Product Research (2021)
Update date:2022-08-11
Topics:
Pis Diez, Cristian M.
Céspedes, Mariela
Di Venosa, Gabriela M.
Calvo, Gustavo
Avigliano, Esteban
Casas, Adriana G.
Palermo, Jorge A.
In this work, eleven new derivatives were prepared of the alkaloid olivacine (1), which was isolated from the bark of Aspidosperma australe. These compounds (7a–k) are hybrids of olivacine and indoles or carbazole, tethered by alkyl chains of variable lengths (C-4, C-5 or C-6). Compounds 7a–k showed increased cytotoxicity towards a panel of four cell lines. The subcellular localization of olivacine and of the synthetic derivatives was studied by fluorescence microscopy. The cycles of K562 cells exposed to olivacine or compounds 7a–k were analysed by flow cytometry, and showed, for some of the new derivatives, a different profile of cell distribution among the phases of the cycle when compared to olivacine, which is indicative of lysosomal apoptosis.
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(2021)