Preprint Communication Version 1 This version is not peer-reviewed

The Mechanisms of the Frank-Starling Law and Familial Cardiomyopathy are Different. The Function of Myosin Binding Protein-C is Retained on Myocyte Length Increase and Force Generated is Kinase controlled

Version 1 : Received: 4 October 2019 / Approved: 7 October 2019 / Online: 7 October 2019 (12:15:26 CEST)

How to cite: Smith, G.A. The Mechanisms of the Frank-Starling Law and Familial Cardiomyopathy are Different. The Function of Myosin Binding Protein-C is Retained on Myocyte Length Increase and Force Generated is Kinase controlled. Preprints 2019, 2019100068 (doi: 10.20944/preprints201910.0068.v1). Smith, G.A. The Mechanisms of the Frank-Starling Law and Familial Cardiomyopathy are Different. The Function of Myosin Binding Protein-C is Retained on Myocyte Length Increase and Force Generated is Kinase controlled. Preprints 2019, 2019100068 (doi: 10.20944/preprints201910.0068.v1).

Abstract

I have recently reiterated that the cross-bridge is a calcium ATPase that is inhibited by magnesium and this arises because in normal hearts Myosin binding Protein-C prevents the use of MgATP as rate limiting substrate ensuring that Ca2+ replaces Mg2+ in the excitation pathway. Here I revisit the studies on [Ca2+] dependency of ATPase and tension under diastolic stretch with a different conclusion on Hill coefficients. This reveals the underlying mechanisms of the Frank-Starling Law and Hypertrophic myopathy are not the same, the former being kinase controlled.

Subject Areas

Frank-Starling; myopathy; Myosin Binding Protein-C; Kinase mechanism

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