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Induction of Oxidative Stress by Mananese Chloride in Cultured $H_9C_2$ Cells  

Park, Eun-Jung (College of Pharmacy, Dongduk Women's University)
Park, Kwang-Sik (College of Pharmacy, Dongduk Women's University)
Publication Information
YAKHAK HOEJI / v.52, no.3, 2008 , pp. 212-218 More about this Journal
Abstract
Manganese is a naturally occurring element which is widespread in the environment. Also, manganese is an essential trace element and plays a key role in important biological reactions catalyzed by enzymes. However, exposure to high levels of manganese can cause toxicity in neurone and inhalation system, also damage in various tissues. We investigated the toxicity induced by manganese compound ($MnCl_2$) in cultured rat cardiomyocytes. Treatment of manganese to cultured cardiomyocyte led to cell death, reactive oxygen species (ROS) increase, and cytosolic caspase-3 activation. The ROS increase was related with the decreased level of glutathione. Expressions of ROS related genes such as heme oxygenase-1, thioredoxin reductase, and NADH quinone oxidase were significantly induced in manganese treated cells. These results suggest that manganese induce oxidative stress and apoptosis in cardiomyocytes, and may be the one of risk factors to cause heart dysfunction in vivo.
Keywords
manganese chloride; cytotoxicity; oxidative stress; cardiomyocytes;
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