Τόμος 24 (2010) – Τεύχος 2 – Άρθρο 37 – Επιθεώρηση Κλινικής Φαρμακολογίας και Φαρμακοκινητικής-Διεθνής Έκδοση – Volume 24 (2010) – Issue 2 – Article 37 – Epitheorese Klinikes Farmakologias και Farmakokinetikes-International Edition

Title Assessing the effect of imatinib on the expression of genes involved in mitochondrial cell respiration in human K-562 CML cells
Authors Ioannis D. Bonovolias, Lefkothea C. Papadopoulou and Asterios S. Tsiftsoglou

Laboratory of Pharmacology, Department of Pharmaceutical Sciences, Aristotle University of Thessaloniki (A.U.TH.), GR-54124, Thessaloniki, GREECE

Citation Bonovolias, I.D., Papadopoulou, L.C., Tsiftsoglou, A.S.: Assessing the effect of imatinib on the expression of genes involved in mitochondrial cell respiration in human K-562 CML cells, Epitheorese Klin. Farmakol. Farmakokinet. 24(2): 123-124 (2010)
Publication Date 2010
Full Text Language English
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Keywords Imatinib, COX deficiency, Mitochondrion, K-562 cells.
Other Terms Review article
Summary Imatinib (IM) is a selective targeted inhibitor of chimeric Bcr-Abl tyrosine kinase, developed as a highly effective first line therapeutic agent to treat human chronic myelogenous leukemia and acute lympho-cytic leukemia. Although IM is a designed molecular inhibitor of Bcr-Abl tyrosine kinase, additional mechanisms perhaps are involved leading to IM-induced drug resistance and cardiovascular toxicity. Our most recent observations that hemin (the oxidized form of heme) can counteract the cytotoxic effect of IM, prompted us to investigate the question whether IM dismantles the mitochondrial cell respiration pathway by blocking the expression of several genes encoding vital hemoproteins and other related proteins involved in the biosynthesis of cytochrome c oxidase. RT-PCR analysis revealed that IM repressed the expression of SCO2, COX17, Frataxin and Ferrochelatase genes, among others involved in mitochondrial respiratory chain pathway. These results indicate that IM selectively represses the expression of key-genes and provide novel mechanism(s) of IM that may explain its cardiovascular toxicity.
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