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Molecular Pharmacology of the Interaction of Anthracyclines with Iron

X. Xu, H. L. Persson and D. R. Richardson
Molecular Pharmacology August 2005, 68 (2) 261-271; DOI: https://doi.org/10.1124/mol.105.013383
X. Xu
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H. L. Persson
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D. R. Richardson
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Abstract

Although anthracyclines such as doxorubicin are widely used antitumor agents, a major limitation for their use is the development of cardiomyopathy at high cumulative doses. This severe adverse side effect may be due to interactions with cellular iron metabolism, because iron loading promotes anthracycline-induced cell damage. On the other hand, anthracycline-induced cardiotoxicity is significantly alleviated by iron chelators (e.g., desferrioxamine and dexrazoxane). The molecular mechanisms by which anthracyclines interfere with cellular iron trafficking are complex and still unclear. Doxorubicin can directly bind iron and can perturb iron metabolism by interacting with multiple molecular targets, including the iron regulatory proteins (IRP) 1 and 2. The RNA-binding activity of these molecules regulates synthesis of the transferrin receptor 1 and ferritin, which are crucial proteins involved in iron uptake and storage, respectively. At present, it is not clear whether doxorubicin affects IRP1-RNA-binding activity by intracellular formation of doxorubicinol and/or by generation of the doxorubicin-iron(III) complex. Furthermore, doxorubicin prevents the mobilization of iron from ferritin by a mechanism that may involve lysosomal degradation of this protein. Prevention of iron mobilization from ferritin would probably disturb vital cellular functions as a result of inhibition of essential iron-dependent proteins, such as ribonucleotide reductase. This review discusses the molecular interactions of anthracyclines with iron metabolism and the development of cardioprotective strategies such as iron chelators.

  • Received March 31, 2005.
  • Accepted May 9, 2005.
  • The American Society for Pharmacology and Experimental Therapeutics
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Molecular Pharmacology: 68 (2)
Molecular Pharmacology
Vol. 68, Issue 2
1 Aug 2005
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Molecular Pharmacology of the Interaction of Anthracyclines with Iron

X. Xu, H. L. Persson and D. R. Richardson
Molecular Pharmacology August 1, 2005, 68 (2) 261-271; DOI: https://doi.org/10.1124/mol.105.013383

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Molecular Pharmacology of the Interaction of Anthracyclines with Iron

X. Xu, H. L. Persson and D. R. Richardson
Molecular Pharmacology August 1, 2005, 68 (2) 261-271; DOI: https://doi.org/10.1124/mol.105.013383
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    • Cellular and Molecular Physiology of Iron Metabolism
    • Iron-Related Mechanisms for Anthracycline-Induced Cardiotoxicity
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