6533b820fe1ef96bd127917d

RESEARCH PRODUCT

Galangin increases the cytotoxic activity of imatinib mesylate in imatinib-sensitive and imatinib-resistant Bcr-Abl expressing leukemia cells

Nicola GebbiaStefania GrimaudoMaria MeliDaniele SimoniManlio TolomeoL. CrostaFrancesco Paolo InvidiataRosaria Maria PipitoneLucina TitoneAntonietta Di CristinaLuisa Dusonchet

subject

Cancer ResearchSettore MED/17 - Malattie InfettiveSettore MED/06 - Oncologia MedicaApoptosisPharmacologyResting Phase Cell CyclePiperazineschemistry.chemical_compoundCell Line TumorLeukemia Myelogenous Chronic BCR-ABL Positivehemic and lymphatic diseasesAntineoplastic Combined Chemotherapy ProtocolsmedicineHumansCytotoxic T cellChrysinneoplasmsFlavonoidsLeukemiaG1 PhaseApoptosiCell DifferentiationImatinibmedicine.diseaseSettore CHIM/08 - Chimica FarmaceuticaGalanginLeukemiaPyrimidinesImatinib mesylateOncologychemistryDrug Resistance NeoplasmImatinibBenzamidesSettore BIO/14 - FarmacologiaImatinib MesylateK562 CellsFisetinBcr-AblK562 cellsmedicine.drug

description

Resistance to imatinib mesylate is an emergent problem in the treatment of Bcr-Abl expressing myelogenous leukemias and additional therapeutic strategies are required. We observed that galangin, a non-toxic, naturally occurring flavonoid was effective as anti-proliferative, and apoptotic agent in Bcr-Abl expressing K562 and KCL22 cells and in imatinib mesylate resistant K562-R and KCL22-R cells. Galangin induced an arrest of cells in G0–G1phase of cell cycle and a decrease in pRb, cdk4, cdk1, cycline B levels; moreover, it was able to induce a monocytic differentiation of leukemic Bcr-Abl+ cells. Of note, galangin caused a decrease in Bcl-2 levels and markedly increased the apoptotic activity of imatinib both in sensitive or imatinib-resistant Bcr-Abl+ cell lines. In contrast, flavonoids unable to modify the Bcl-2 intracellular levels, such as fisetin and chrysin, did not increase the apoptotic effect of imatinib. These data suggest that galangin is an interesting candidate for a combination therapy in the treatment of imatinib-resistant leukemias.

yearjournalcountryeditionlanguage
2008-01-01Cancer Letters
https://doi.org/10.1016/j.canlet.2008.02.025