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首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >High cholesterol diet effects on ischemia- reperfusion injury of the heart
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High cholesterol diet effects on ischemia- reperfusion injury of the heart

机译:高胆固醇饮食对心脏缺血再灌注损伤的影响

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摘要

Ischemic heart disease is the leading cause of morbi-mortality in developed countries. Both ischemia-reperfusion injury and mechanisms of cardioprotection have been studied for more than 50 years. It is known that the physiopathological mechanism of myocardial ischemia involves several factors that are closely related to its development, of which hypercholesterolemia is one of the main ones. Therefore, the objective of this review was to elucidate the effects of a high-cholesterol diet on normal ventricular function and ischemia-reperfusion injury associated phenomenon such as post-ischemic ventricular dysfunction (stunned myocardium). Although there exist many studies considering several aspects of this physiopathological entity, the majority were carried out on normal animals. Thus, experiments carried out on hypercholesterolemic models are controversial, in particular those evaluating different mechanisms of cardioprotection such as ischemic preconditioning and postconditioning, and cardioprotection granted by drugs such as statins, which apart from exerting a lipid-lowering effect, exert pleiotropic effects providing cardioprotec-tion against ischemia-reperfusion injury. These controversial results concerning the mechanisms of cardioprotection vary according to quality, composition, and time of administration of the high-cholesterol diet, as well as the species used in each experiment. Thus, to compare the results it is necessary to take all of these variables into account, since they can change the obtained results.
机译:在发达国家,缺血性心脏病是致死的主要原因。缺血再灌注损伤和心脏保护机制均已研究了50多年。众所周知,心肌缺血的生理病理机制涉及与其发展密切相关的几个因素,其中高胆固醇血症是主要因素之一。因此,本综述的目的是阐明高胆固醇饮食对正常心室功能和与缺血再灌注损伤相关的现象(如缺血后心室功能障碍(心肌震颤))的影响。尽管有许多研究考虑了这种生理病理学实体的几个方面,但大多数是在正常动物上进行的。因此,在高胆固醇血症模型上进行的实验是有争议的,特别是那些评估不同的心脏保护机制(如缺血预处理和后处理)以及由他汀类药物授予的心脏保护作用的实验,除发挥降脂作用外,还发挥多效作用,从而提供了心脏protec抗缺血再灌注损伤。这些与心脏保护机制有关的有争议的结果会根据高胆固醇饮食的给药质量,成分和时间以及每个实验中使用的种类而有所不同。因此,为了比较结果,必须考虑所有这些变量,因为它们可以改变获得的结果。

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