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- Title
Activation of Sonic hedgehog signaling in ventricular cardiomyocytes exerts cardioprotection against ischemia reperfusion injuries.
- Authors
Paulis, Ludovit; Fauconnier, Jeremy; Cazorla, Olivier; Thireau, Jérome; Soleti, Raffaella; Vidal, Bastien; Ouillé, Aude; Bartholome, Marion; Bideaux, Patrice; Roubille, François; Le Guennec, Jean-Yves; Andriantsitohaina, Ramaroson; Martínez, M. Carmen; Lacampagne, Alain
- Abstract
Sonic hedgehog (SHH) is a conserved protein involved in embryonic tissue patterning and development. SHH signaling has been reported as a cardio-protective pathway via muscle repair-associated angiogenesis. The goal of this study was to investigate the role of SHH signaling pathway in the adult myocardium in physiological situation and after ischemia-reperfusion. We show in a rat model of ischemia-reperfusion that stimulation of SHH pathway, either by a recombinant peptide or shed membranes microparticles harboring SHH ligand, prior to reperfusion reduces both infarct size and subsequent arrhythmias by preventing ventricular repolarization abnormalities. We further demonstrate in healthy animals a reduction of QTc interval mediated by NO/cGMP pathway leading to the shortening of ventricular cardiomyocytes action potential duration due to the activation of an inward rectifying potassium current sharing pharmacological and electrophysiological properties with ATP-dependent potassium current. Besides its effect on both angiogenesis and endothelial dysfunction we demonstrate here a novel cardio-protective effect of SHH acting directly on the cardiomyocytes. This emphasizes the pleotropic effect of SHH pathway as a potential cardiac therapeutic target.
- Subjects
HEDGEHOG signaling proteins; FETAL tissues; NEOVASCULARIZATION; RECOMBINANT proteins; ARRHYTHMIA; ADENOSINE triphosphate
- Publication
Scientific Reports, 2015, p7983
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep07983