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Acute pathophysiological myocardial changes following intra-cardiac electrical shocks using a proteomic approach in a sheep model.

Abstract：

:Implantable cardioverter-defibrillators (ICD) are meant to fight life-threatening ventricular arrhythmias and reduce overall mortality. Ironically, life-saving shocks themselves have been shown to be independently associated with an increased mortality. We sought to identify myocardial changes at the protein level immediately after ICD electrical shocks using a proteomic approach. ICD were surgically implanted in 10 individuals of a healthy male sheep model: a control group (N = 5) without any shock delivery and a shock group (N = 5) with the delivery of 5 consecutive shocks at 41 J. Myocardial tissue samples were collected at the right-ventricle apex near to the lead coil and at the right ventricle basal free wall region. Global quantitative proteomics experiments on myocardial tissue samples were performed using mass spectrometry techniques. Proteome was significantly modified after electrical shock and several mechanisms were associated: protein, DNA and membrane damages due to extreme physical conditions induced by ICD-shock but also due to regulated cell death; metabolic remodeling; oxidative stress; calcium dysregulation; inflammation and fibrosis. These proteome modifications were seen in myocardium both "near" and "far" from electrical shock region. N-term acetylated troponin C was an interesting tissular biomarker, significantly decreased after electrical shock in the "far" region (AUC: 0.93). Our data support an acute shock-induced myocardial tissue injury which might be involved in acute paradoxical deleterious effects such as heart failure and ventricular arrhythmias.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Bodin A,Labas V,Bisson A,Teixeira-Gomes AP,Blasco H,Tomas D,Combes-Soia L,Marcelo P,Miquelestorena-Standley E,Baron C,Angoulvant D,Babuty D,Clementy N

doi

10.1038/s41598-020-77346-x

subject

Has Abstract

pub_date

2020-11-20 00:00:00

pages

20252

issue

1

issn

2045-2322

pii

10.1038/s41598-020-77346-x

journal_volume

10

pub_type

杂志文章

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