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Cardiac mechanotransduction and implications for heart disease

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Abstract

Mechanotransduction, the conversion of a mechanical stimulus into a cellular response, plays a fundamental role in cell volume regulation, fertilization, gravitaxis, proprioception, and the senses of hearing, touch, and balance. Mechanotransduction also fills important functions in the myocardium, where each cycle of contraction and relaxation leads to dynamic deformations. Since the initial observation of stretch induced muscle growth, our understanding of this complex field has been steadily growing, but remains incomplete. For example, the mechanism by which myocytes sense mechanical forces is still unknown. It is also unknown which mechanism converts such a stimulus into an electrochemical signal, and how this information is transferred to the nucleus. Is there a subpopulation of mechanosensing myocytes or mechanosensing cells in the myocardium? The following article offers an overview of the fundamental processes of mechanical stretch sensing in myocytes and recent advances in our understanding of this increasingly important field. Special emphasis is placed on the unique cardiac cytoskeletal structure and related Z-disc proteins.

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Fig. 1.

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Abbreviations

BNC :

Brain sodium channel

CARP :

Cardiac ankyrin repeat protein

MLP :

Muscle LIM protein

SAC :

Stretch-activated channel

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Acknowledgements

Virginia McIlwain is acknowledged for her excellent assistance in the preparation of this manuscript. R. Knöll is supported by DFG Kn 448/2-1, DFG Kn 448/6-1.

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  1. Institute of Molecular Medicine, University of California at San Diego, 9500 Gilman Drive Mail Code 0641, La Jolla, CA, 92093-0641, USA

    Ralph Knöll, Masahiko Hoshijima & Kenneth Chien

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  1. Ralph Knöll
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  2. Masahiko Hoshijima
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  3. Kenneth Chien
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Correspondence to Ralph Knöll.

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Knöll, R., Hoshijima, M. & Chien, K. Cardiac mechanotransduction and implications for heart disease. J Mol Med 81, 750–756 (2003). https://doi.org/10.1007/s00109-003-0488-x

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