Sarcoplasmic reticulum calcium mishandling: central tenet in heart failure?

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Calcium sequestration by the sarcoplasmic reticulum in heart failure.

Myocardial contraction and relaxation are dependent w 2qx upon the rise and fall of cytosolic Ca in cardiac myocytes. The release and sequestration of Ca by the sarcoplasmic reticulum are the principal mechanisms through which this occurs. During relaxation, Ca is actively transported from the cytosol into the sarcoplasmic reticulum; during contraction, this sequestered Ca is passively released...

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Sarcoplasmic reticulum in heart failure: central player or bystander?

Ronald M. Phillips , Prakash Narayan , Ana M. Gomez , Keith Dilly , Larry R. Jones , ́ W. Jonathan Lederer , Ruth A. Altschuld a,) a Department of Medical Biochemistry, Ohio State UniÕersity Medical Center, 333 Hamilton Hall, 1645 Neil AÕenue, Columbus, OH 43210-1218, USA b Departments of Molecular Biology and Biophysics and Physiology, UniÕersity of Maryland School of Medicine, Baltimore, MD 21...

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Sarcoplasmic Reticulum Ca Homeostasis and Heart Failure

Heart function vitally relies on precisely controlled intracellular Ca homeostasis during each cardiac cycle. Abnormalities in Ca regulation cause contractile dysfunction and arrhythmias under different pathological conditions including heart failure (HF). Playing a particularly important role in heart contraction is the sarcoplasmic reticulum (SR). In adult ventricular myocytes, the SR forms a...

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Illuminating sarcoplasmic reticulum calcium.

The bulk of the Ca 2 that activates contraction in the heart comes from the sarcoplasmic reticulum (SR). Calcium is released by the process of Ca -induced Ca release (CICR) in which the entry of a small amount of Ca across the cell membrane triggers the release of much more from the SR. This mechanism depends on the fact that Ca entry from the extracellular fluid (via the L-type Ca current) inc...

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ژورنال

عنوان ژورنال: Biophysical Reviews

سال: 2020

ISSN: 1867-2450,1867-2469

DOI: 10.1007/s12551-020-00736-y