ELLIPTICINE

Описание

Ellipticine is an alkaloid isolated from Apocyanaceae plants that exhibits antitumor activities by intercalating into DNA and/or inhibiting DNA topoisomerase II. It forms covalent adducts in DNA after being enzymatically activated with cytochrome P450 isoforms (e.g., CYP3A4, CYP1A1, or CYP1A2) or by peroxidases in target tissues. Ellipticine has been shown to inhibit the proliferation of human breast adenocarcinoma MCF-7 cells, leukemia HL-60 and CCRF-CEM cells, neuroblastoma IMR-32, UKF-NB-3, and UKF-NB-4 cells, and U87MG glioblastoma cells with IC₅₀ values ranging from 0.27-4.7 μM.

Определение

ChEBI: A organic heterotetracyclic compound that is pyrido[4,3-b]carbazole carrying two methyl substituents at positions 5 and 11.

Общее описание

A topoisomerase II inhibitor. Acts as an intercalative alkaloid that stimulates topoisomerase II-mediated DNA breakage. Is also capable of uncoupling mitochondrial oxidative phosphorylation.

Методы очистки

This DNA intercalator is purified by recrystallisation from CHCl3 or MeOH and is dried in vacuo. The UV max values in aqueous EtOH/HCl are at 241, 249, 307, 335 and 426nm. [Marini-Bettolo & Schmutz Helv Chim Acta 42 2146 1959.] The methiodide has m 360o(dec), with UV (EtOH/KOH) at 223, 242, 251, 311, 362 and 432nm. [Goodwin et al. J Am max Chem Soc 81 1903 1959, Beilstein 23/9 V 417.]