Alterations of Excitation-Contraction Coupling in the Failing Human Heart

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Alteration of excitation-contraction coupling in the failing human heart was deemed an interesting subject for a dialogue between basic scientists and clinical researchers in continuation of previous Gargellen Conferences concerned with the function of the normal and failing human myocardium. In 1987 basic mechanisms and clinical implications of then new insights into cardiac energetics was followed by a comprehensive review of inotropic stimulation and myocardial energetics in 1989. Here, we undertook a re-evaluation of the principles of inotropic stimulation and of its potential therapeutic value, based on new observa tions from experiments with human myocardium. In 1992 the risk due to myocardial phenotype change as a consequence of adaptation in heart failure was published. Here, alterations of subcellular structures and functions as a consequence of chronic heart failure, summarized as phenotype change, could be described as an essential characteristic of the failing human myocardium. This topic was discussed in greater depth in the volume ’Cellular and Molecular Alterations in the Failing Human Heart’, considering both the sarcolemma and the phosphodiesterases, as well as excitation-contraction coupling and contractile proteins, extracellular matrix, and mitrochondrial function.

Ca transport during contraction and relaxation in mammalian ventricular muscle.- Sites of regulatory interaction between calcium ATPases and phospholamban.- The relative phospholamban and SERCA2 ratio: a critical determinant of myocardial contractility.- Phosphorylation and regulation of the Ca2+-pumping ATPase in cardiac sarcoplasmic reticulum by calcium/calmodulin-dependent protein kinase.- Site-specific phosphorylation of a phospholamban peptide by cyclic nucleotide- and Ca2+/calmodulin-dependent protein kinases of cardiac sarcoplasmic reticulum.- Sodium-calcium exchange: Recent advanves.- Expression and function of the cardiac Na+/Ca2+ exchanger in postnatal development of the rat, in experimental-induced cardiac hypertrophy, and in the failing human heart.- Plasma membrane calcium pump: structure, function, and relationships.- Regulation of mRNA-expression of the sarcolemmal calmodulin- dependent calcium pump in cardiac hypertrophy.- Molecular mechanisms regulating the myofilament response to Ca2+: Implications of mutations causal for familial hypertrophic cardiomyopathy.- Ca2+-dependent and Ca2+-independent regulation of contractility in isolated human myocardium.- Calcium handling proteins in the failing human heart.- Role of c AMP in modulating relaxation kinetics and the force-frequency relation in mitral regurgitation heart failure.- Contributions of Ca2+-influx via the L-type Ca2+-current and Ca2+-release from the sarcoplasmic reticulum to [Ca2+]i-transients in human myocytes.- Molecular and cellular aspects of re-entrant arrhythmias.

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Alterations of Excitation-Contraction Coupling in the Failing Human Heart 园艺学

Alterations of Excitation-Contraction Coupling in the Failing Human Heart
园艺学