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The Toxicity Mechanisms of Action of Aβ25–35 in Isolated Rat Cardiac Myocytes

Department of Nephrology, Shengjing Hospital, China Medical University, Shenyang 110004, China
Department of Pathology, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
Department of Aging Biology, Institute of Pathogenesis and Disease Prevention, Shinshu University Graduate School of Medicine, Shinshu University, 3-1-1, Asahi, Matsumoto 390-8621, Japan
Author to whom correspondence should be addressed.
Molecules 2014, 19(8), 12242-12257;
Received: 12 May 2014 / Revised: 7 July 2014 / Accepted: 10 July 2014 / Published: 13 August 2014
(This article belongs to the Section Molecular Diversity)
PDF [2237 KB, uploaded 13 August 2014]


β-Amyloid (Aβ) is deposited in neurons and vascular cells of the brain and is characterized as a pathologic feature of Alzheimer’s disease (AD). Recently studies have reported that there is an association between cardiovascular risk factors and AD, however the mechanism of this association is still uncertain. In this study we observed Aβ had an effect on cardiovascular cells. We represent as a major discovery that Aβ25–35 had toxicity on isolated rat cardiac myocytes by impacting the cytoskeleton assembly and causing ER stress, ultimately contributing to the apoptosis of the myocytes. Importantly, the activation of ER stress and subsequent cellular dysfunction and apoptosis by Aβ25–35 was regulated by the MAPK pathway, which could be prevented by inhibition of p38 via pharmacological inhibitors. It was noteworthy that Aβ25–35 played a critical role in cardiac myocytes, suggesting that Alzheimer’s disease (AD) had a relation with the heart and understanding of these associations in future will help search for effective treatment strategies. View Full-Text
Keywords: Alzheimer’s disease (AD); β-amyloid (Aβ); rat cardiac myocyte; ER-stess; p38 Alzheimer’s disease (AD); β-amyloid (Aβ); rat cardiac myocyte; ER-stess; p38

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Zhang, B.; Bian, X.; He, P.; Fu, X.; Higuchi, K.; Yang, X.; Li, D. The Toxicity Mechanisms of Action of Aβ25–35 in Isolated Rat Cardiac Myocytes. Molecules 2014, 19, 12242-12257.

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