Results: 50

Effect of varying hypoxia reoxygenation times on autophagy of cardiomyocytes

Acta cir. bras; 33 (3), 2018
Abstract Purpose: To investigate the impact of different hypoxia reoxygenation (HR) times on autophagy of rat cardiomyocytes (H9C2). Methods: Rat cardiomyocytes were randomly divided into normal control group (group A), hypoxia group (group B), 2 h HR group (group C), 12 h HR group (group D), and 24 h...

Moderate Continuous Aerobic Exercise Training Improves Cardiomyocyte Contractility in Β1 Adrenergic Receptor Knockout Mice

Arq. bras. cardiol; 110 (3), 2018
Abstract Background: The lack of cardiac β1-adrenergic receptors (β1-AR) negatively affects the regulation of both cardiac inotropy and lusitropy, leading, in the long term, to heart failure (HF). Moderate-intensity aerobic exercise (MCAE) is recommended as an adjunctive therapy for patients w...

Practical Implications of Myocardial Viability Studies

Arq. bras. cardiol; 110 (3), 2018
Abstract Many non-invasive methods, such as imaging tests, have been developed aiming to add a contribution to existing studies in estimating patients' prognosis after myocardial injury. This prognosis is proportional to myocardial viability, which is evaluated in coronary artery disease and left ventric...

Melatonin-Induced Protective Effects on Cardiomyocytes Against Reperfusion Injury Partly Through Modulation of IP3R and SERCA2a Via Activation of ERK1

Arq. bras. cardiol; 110 (1), 2018
Resumo Background: Melatonin is a neuroendocrine hormone synthesized primarily by the pineal gland that is indicated to effectively prevent myocardial reperfusion injury. It is unclear whether melatonin protects cardiac function from reperfusion injury by modulating intracellular calcium homeostasis. O...

Kinin B2-Receptor in human iPSC differentiation into cardiomyocytes

Cardiovascular diseases are responsible for almost one third of all global deaths yearly, and therefore are largely studied. Cardiomyocytes derived from human induced pluripotent stem cells (hiPSC-CM) have emerged as an exciting technology for cardiac disease modelling and personalised therapy. Neverthel...

Cardio-oncologia na população pediátrica

Nas últimas décadas, a oncologia pediátrica tem demonstrado expressivo sucesso no tratamento do câncer infantojuvenil, com significativo aumento das taxas de cura e sobrevida, principalmente devido ao diagnóstico precoce e à quimioterapia mais eficaz, além do auxílio da radioterapia em determinad...

Myocardial Viability on Cardiac Magnetic Resonance

Arq. bras. cardiol; 108 (5), 2017
Abstract The study of myocardial viability is of great importance in the orientation and management of patients requiring myocardial revascularization or angioplasty. The technique of delayed enhancement (DE) is accurate and has transformed the study of viability into an easy test, not only for the detec...

MicroRNA-122 regulates caspase-8 and promotes the apoptosis of mouse cardiomyocytes

Braz. j. med. biol. res; 50 (2), 2017
Cardiomyocyte apoptosis plays key roles in the pathogenesis of heart diseases such as myocardial infarction. MicroRNAs are important regulators of gene expression, which are also involved in the regulation of cardiomyocyte apoptosis. However, cardiomyocyte apoptosis regulated by microRNA (miR)-122 is lar...

Protective effects of fentanyl preconditioning on cardiomyocyte apoptosis induced by ischemia-reperfusion in rats

Braz. j. med. biol. res; 50 (2), 2017
We aimed to study the effect of fentanyl (Fen) preconditioning on cardiomyocyte apoptosis induced by ischemia-reperfusion (I/R) in rats. A total of 120 Sprague Dawley male rats (age: 3 months) were randomly divided into: sham operation group (S group), I/R group, normal saline I/R group (NS group), and f...