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UNBS1450, a steroid cardiac glycoside inducing apoptotic cell death in human leukemia cells

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Abstract

Cardiac steroids are used to treat various diseases including congestive heart failure and cancer. The aim of this study was to investigate the anti-leukemic activity of UNBS1450, a hemi-synthetic cardenolide belonging to the cardiac steroid glycoside family. Here, we report that, at low nanomolar concentrations, UNBS1450 induces apoptotic cell death. Subsequently, we have investigated the molecular mechanisms leading to apoptosis activation. Our results show that UNBS1450 inhibits NF-κB transactivation and triggers apoptosis by cleavage of pro-caspases 8, 9 and 3/7, by decreasing expression of anti-apoptotic Mcl-1 and by recruitment of pro-apoptotic Bak and Bax protein eventually resulting in cell death. © 2010 Elsevier Inc.

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Juncker, T., Cerella, C., Teiten, M. H., Morceau, F., Schumacher, M., Ghelfi, J., … Diederich, M. (2011). UNBS1450, a steroid cardiac glycoside inducing apoptotic cell death in human leukemia cells. Biochemical Pharmacology, 81(1), 13–23. https://doi.org/10.1016/j.bcp.2010.08.025

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