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09 May 2017 : Original article  

Hydrogen Sulfide Improves Cardiomyocyte Function in a Cardiac Arrest Model

Nahuel Aquiles Garcia1ABCDEF, Javier Moncayo-Arlandi12ABCDEF, Alejandro Vazquez1BC, Patricia Genovés1B, Conrado J. Calvo3CD, José Millet3G, Nuria Martí45BC, Carmen Aguado45BC, Erwin Knecht45G, Iñigo Valiente-Alandi6C, José A. Montero1G, Antonio Díez-Juan78ADEFG*, Pilar Sepúlveda1ADEFG

DOI: 10.12659/AOT.901410

Ann Transplant 2017; 22:285-295

Abstract

BACKGROUND: Cardioplegic arrest is a common procedure for many types of cardiac surgery, and different formulations have been proposed to enhance its cardio-protective effect. Hydrogen sulfide is an important signaling molecule that has cardio-protective properties. We therefore studied the cardio-protective effect of hydrogen sulfide in cardiac cell culture and its potential therapeutic use in combination with cardioplegia formulations.

MATERIAL AND METHODS: We added hydrogen sulfide donor GYY4137 to HL-1 cells to study its protective effect in nutrient starved conditions. In addition, we tested the potential use of GYY4137 when it is added into two different cardioplegia formulations: Cardi-Braun® solution and del Nido solution in an ex vivo Langendorff perfused rat hearts model.

RESULTS: We observed that eight-hour pre-treatment with GYY4137 significantly suppressed apoptosis in nutrient-starved HL-1 cells (28% less compared to untreated cells; p<0.05), maintained ATP content, and reduced protein synthesis. In ex vivo experiments, Cardi-Braun® and del Nido cardioplegia solutions supplemented with GYY4137 significantly reduced the pro-apoptotic protein caspase-3 content and preserved ATP content. Furthermore, GYY4137 supplemented cardioplegia solutions decreased the S-(5-adenosyl)-L-methionine/S-(adenosyl)-L-homocysteine ratio, reducing the oxidative stress in cardiac tissue. Finally, heart beating analysis revealed the preservation of the inter-beat interval and the heart rate in del Nido cardioplegia solution supplemented with GYY4137.

CONCLUSIONS: GYY4137 preconditioning preserved energetic state during starved conditions, attenuating the cardiomyocytes apoptosis in vitro. The addition of GYY4137 to cardioplegia solutions prevented apoptosis, ATP consumption, and oxidative stress in perfused rat hearts, restoring its electrophysiological status after cardiac arrest. These findings suggested that GYY4137 sulfide donor may improve the cardioplegia solution performance during cardiac surgery.

Keywords: Cardiac Surgical Procedures, Cardioplegic Solutions, Hydrogen Sulfide

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Annals of Transplantation eISSN: 2329-0358
Annals of Transplantation eISSN: 2329-0358