PMID: 9188758Jan 1, 1997Paper

Molecular mechanisms in the antiproliferative action of quercetin

Life Sciences
B CsokayE Olah

Abstract

A single treatment with quercetin (5.5 microM), a plant flavonoid, activated both apoptosis and differentiation programs in K562 human leukemia cells. K562 cells expressed commitment to apoptosis after 1 h exposure, however, at least 12 h of drug exposure was needed to induce differentiation. Early (1 h) down-regulation of the c-myc and Ki-ras oncogenes and rapid reduction of inositol-1,4,5-trisphosphate (IP3) concentration (IC50 = 9 microM, 1 h incubation) are part of the antiproliferative action of quercetin and appear to relate to induction of differentiation and/or apoptotic program of K562 leukemia cells treated with quercetin.

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