Abstract
Doxorubicin is one of the most effective drugs available for cancer chemotherapy. However, the clinical use of doxorubicin has been greatly limited because of severe side effects on cardiomyocytes. Since Nd1-L, a novel actin-binding protein, is expressed most abundantly in the heart of adult mice, we examined a role of Nd1-L in doxorubicin-induced cardiomyopathy. When doxorubicin (5 mg/kg × 4 times) was injected into adult mice at a 3-day-interval, approximately 50% of injected mice died within 4 weeks of the first injection. Nd1-L mRNA expression in the heart decreased within 3 weeks after the first injection and many cardiomyocytes of injected mice died by apoptosis. Overexpression of Nd1-L in the heart of transgenic mice protected the cardiomyocytes from apoptosis and improved survival rate after doxorubicin injection. Furthermore, activation of Erk1/2 was observed in cultured cells overexpressing Nd1-L. Thus, Nd1-L plays a critical role in protecting the heart from doxorubicin-induced cardiomyopathy.
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Acknowledgments
We would like to extend our thanks to Drs. S. Okada and M. Kang for helpful discussion, H. Satake for her technical assistance, and N. Kakinuma for her secretarial assistance. This work was supported in part by a grant-in aid for scientific research from the Ministry of Education, Science, Sport and Culture of Japan.
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Matsudo, Y., Takamori, Y., Fujimura, L. et al. Overexpression of Nd1, a novel Kelch family protein, in the heart of transgenic mice protects against doxorubicin-induced cardiomyopathy. Transgenic Res 15, 573–581 (2006). https://doi.org/10.1007/s11248-006-9010-x
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DOI: https://doi.org/10.1007/s11248-006-9010-x