期刊
FREE RADICAL BIOLOGY AND MEDICINE
卷 49, 期 9, 页码 1422-1431出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.freeradbiomed.2010.08.005
关键词
Doxorubicin; p38 alpha MAPK; Oxidative stress; Apoptosis; Free radicals
资金
- Yujin Memorial Grant
- Ministry of Education, Culture, Sports, Science, and Technology of Japan
- Promotion and Mutual Aid Corporation for Private Schools of Japan
- Niigata City
Doxorubicin (Dox) is a widely used antitumor drug, but its application is limited because of its cardiotoxic side effects. Increased expression of p38 alpha mitogen-activated protein kinase (MAPK) promotes cardiomyocyte apoptosis and is associated with cardiac dysfunction induced by prolonged agonist stimulation. However, the role of p38 alpha MAPK is not clear in Dox-induced cardiac injury. Cardiac dysfunction was induced by a single injection of Dox into wild-type (WT) mice and transgenic mice with cardiac-specific expression of a dominant-negative mutant form of p38 alpha MAPK (TG). Left ventricular (LV) fractional shortening and ejection fraction were higher and the expression levels of phospho-p38 MAPK and phospho-MAPK-activated mitogen kinase 2 were significantly suppressed in TG mouse heart compared to WT mice after Dox injection. Production of LV proinflammatory cytokines, cardiomyocyte DNA damage, myocardial apoptosis, caspase-3-positive cells, and phospho-p53 expression were decreased in TG mice after Dox injection. Moreover, LV expression of NADPH oxidase subunits and reactive oxygen species was significantly less in TG mice compared to WT mice after Dox injection. These findings suggest that p38 alpha MAPK may play a role in the regulation of cardiac function, oxidative stress, and inflammatory and apoptotic mediators in the heart after Dox administration. (C) 2010 Elsevier Inc. All rights reserved.
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