6533b82bfe1ef96bd128d740

RESEARCH PRODUCT

The new iodoacetamidobenzofuran derivative TR120 decreases STAT5 expression and induces antitumor effects in imatinib-sensitive and imatinib-resistant BCR-ABL-expressing leukemia cells

Romeo RomagnoliDaniele SimoniMaria MeliFrancesco DieliMaria Rosaria PipitoneStefania GrimaudoArianna FerroAntonietta Di CristinaManlio Tolomeo

subject

Cancer ResearchFusion Proteins bcr-ablApoptosisPiperazinesSettore MED/15 - Malattie Del Sanguechemistry.chemical_compoundhemic and lymphatic diseasesSTAT5 Transcription FactorCytotoxic T cellPharmacology (medical)Cyclin D1STAT5biologyDrug SynergismCell cycleNeoplasm ProteinsGene Expression Regulation NeoplasticLeukemiaOncologyProto-Oncogene Proteins c-bcl-2BenzamidesImatinib MesylateGrowth inhibitionmedicine.drugbcl-X ProteinDown-RegulationAntineoplastic AgentsBone Marrow CellsResting Phase Cell CycleColony-Forming Units AssayBenzophenonesNecrosisCell Line TumorLeukemia Myelogenous Chronic BCR-ABL PositivemedicineHumansneoplasmsBenzofuransPharmacologyG1 PhaseImatinibBCR-ABL chronic myeloid leukemia imatinib resistance STAT5 tyrosine kinase inhibitorsmedicine.diseaseSettore CHIM/08 - Chimica FarmaceuticaGenes bcl-1Genes bcl-2PyrimidineschemistryApoptosisDrug Resistance NeoplasmSettore BIO/14 - FarmacologiaCancer researchbiology.proteinK562 CellsK562 cells

description

The identification of novel compounds modulating the expression/activity of molecular targets downstream to BCR-ABL could be a new approach in the treatment of chronic myeloid leukemias (CMLs) resistant to imatinib or other BCR-ABL-targeted molecules. Recently, we synthesized a new class of substituted 2-(3,4,5-trimethoxybenzoyl)-2-N,N-dimethylamino-benzo[b]furans, and among these 3-iodoacetylamino-6-methoxybenzofuran-2-yl(3,5-trimethoxyphenyl)methanone (TR120) showed marked cytotoxic activity in BCR-ABL-expressing cells. Interestingly, TR120 was more potent than imatinib in cell growth inhibition and apoptosis induction in both BCR-ABL-expressing K562 and KCL22 cells. Moreover, it showed antitumor activity in imatinib-resistant K562-R and KCL22-R cells at concentrations similar to those active in the respective sensitive cells. Further, TR120 induced a marked decrease in signal transducer and activator of transcription 5 (STAT5) expression in K562 cells. Consistent with this effect, it determined a block of cells in the G0-G1 phase of the cell cycle, a decrease in the level of cyclin D1, and a reduction in Bcl-xL expression; however, it did not cause modifications in the Bcl-2 level. Of interest, TR120 had synergistic effects when used in combination with imatinib in both sensitive and resistant cells. Considering that STAT5 is a BCR-ABL molecular target that plays a key role in the pathogenesis of CML as well as in BCR-ABL-mediated resistance to apoptosis, TR120 could potentially be a useful novel agent in the treatment of imatinib-resistant CML.

yearjournalcountryeditionlanguage
2013-01-01
http://hdl.handle.net/11392/1781299