Induction of centrosome and chromosome aberrations by imatinib in vitro

• Verfasst von: Fabarius, Alice [VerfasserIn]
• Verfasst von: Giehl, Michelle [VerfasserIn]
• Verfasst von: Frank, Oliver [VerfasserIn]
• Verfasst von: Duesberg, Peter [VerfasserIn]
• Verfasst von: Hochhaus, Andreas [VerfasserIn]
• Verfasst von: Hehlmann, Rüdiger [VerfasserIn]
• Verfasst von: Seifarth, Wolfgang [VerfasserIn]
• Titel: Induction of centrosome and chromosome aberrations by imatinib in vitro
• Verf.angabe: A. Fabarius, M. Giehl, O. Frank, P. Duesberg, A. Hochhaus, R. Hehlmann and W. Seifarth
• E-Jahr: 2005
• Jahr: 30 June 2005
• Umfang: 6 S.
• Fussnoten: Gesehen am 12.05.2022
• Titel Quelle: Enthalten in: Leukemia
• Ort Quelle: London : Springer Nature, 1997
• Jahr Quelle: 2005
• Band/Heft Quelle: 19(2005), 9, Seite 1573-1578
• ISSN Quelle: 1476-5551
• DOI: doi:10.1038/sj.leu.2403861
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Cancer Research
• Sach-SW: general
• Sach-SW: Hematology
• Sach-SW: Intensive / Critical Care Medicine
• Sach-SW: Internal Medicine
• Sach-SW: Medicine/Public Health
• Sach-SW: Oncology
• K10plus-PPN: 1801666288

Abstract

Imatinib (STI571, Gleevec/Glivec) is a potent selective tyrosine kinase inhibitor and is used successfully in the treatment of chronic myeloid leukemia (CML). While karyotype alterations, in addition to the Philadelphia chromosome, are a common phenomenon of progressing CML, the observation of BCR-ABL-negative leukemic clones with distinct aberrant karyotypes under an imatinib regimen is not yet understood. Here we test the hypothesis that such tumor clones may be induced de novo from normal cells by imatinib. In vitro experiments with varying drug concentrations (5-20 μ M) were performed on normal human dermal fibroblasts (NHDF), Chinese hamster embryonal and Indian muntjak fibroblasts. After 3 weeks of treatment, analysis of cell cultures by centrosome immunostaining and conventional cytogenetics revealed that imatinib induced centrosome and chromosome aberrations in all cultures in a significant dose-dependent and species-independent manner. Moreover, the results of NHDF long-term culture experiments demonstrated that aberrant phenotypes, emerging under imatinib treatment for 12 weeks, were not reversible after prolonged propagation omitting the drug. These observations suggest a causative role of imatinib in the origin of centrosome and karyotype aberrations (genetic instability) and thus may explain the emergence of clonal chromosomal abnormalities in BCR-ABL-negative progenitor cells under imatinib therapy.