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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Effects of fluoro-doxorubicin (ME2303) on microtubules: influence of different classes of microtubule-associated proteins.

Anthracyclines are among the most useful agents for the treatment of neoplastic disease, but their clinical use is limited by progressive cardiomyopathy. A few studies have suggested the role of microtubules for the understanding of this toxicity. By using kinetic and structural studies, we demonstrate the disorganizing action of fluoro-doxorubicin, a novel anthracycline, on the microtubule system. Microtubules have a rich and complex composition in relation to their numerous functions in cells. In the present study, we investigate the role of two major microtubule-associated protein (MAP) families, Tau and MAP2. Both MAP families are responsible for the properties of different classes of microtubules. We show the differential effect of fluoro-doxorubicin on these two classes of microtubules. Furthermore, we show that fluoro-doxorubicin is able to affect the capacity of purified tubulin to form normal microtubules. This study confirms that anthracyclines may interfer with the microtubule organization. We suggest that some classes of microtubules, with regard to their MAP composition, may be affected more specifically in cardiac myocytes.[1]


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