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Insulin resistance and hyperinsulinaemia in diabetic cardiomyopathy
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Insulin resistance and hyperinsulinaemia in diabetic cardiomyopathy
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Journal Article
Insulin resistance and hyperinsulinaemia in diabetic cardiomyopathy
2016
Overview
Key Points
Reported rises in the prevalence of diabetic cardiomyopathy among developed nations have occurred in parallel with increased rates of obesity, insulin resistance and hyperinsulinaemia
Insulin resistance and/or hyperinsulinaemia seem to underpin the development of diabetic cardiomyopathy, which is initially characterized by diastolic dysfunction in the absence of coronary artery disease and hypertension
Pathophysiological mechanisms include impaired insulin signalling, cardiac mitochondrial dysfunction, endoplasmic reticulum stress, impaired autophagy, impaired myocardial calcium handling, abnormal coronary microcirculation, inappropriate neurohumoral activation and maladaptive immune responses
Insulin resistance, or hyperinsulinaemia, independently predisposes to the development of diabetic cardiomyopathy and targeting insulin resistance or hyperinsulinaemia could be a potential therapeutic strategy to prevent the development of diabetic cardiomyopathy
Diabetic cardiomyopathy is a major cause of morbidity and mortality, and its prevalence is increasing. This Review discusses the latest research in diabetic cardiomyopathy, summarizes current understanding of the molecular mechanisms underpinning this condition and explores potential preventive and therapeutic strategies.
Insulin resistance, type 2 diabetes mellitus and associated hyperinsulinaemia can promote the development of a specific form of cardiomyopathy that is independent of coronary artery disease and hypertension. Termed diabetic cardiomyopathy, this form of cardiomyopathy is a major cause of morbidity and mortality in developed nations, and the prevalence of this condition is rising in parallel with increases in the incidence of obesity and type 2 diabetes mellitus. Of note, female patients seem to be particularly susceptible to the development of this complication of metabolic disease. The diabetic cardiomyopathy observed in insulin- resistant or hyperinsulinaemic states is characterized by impaired myocardial insulin signalling, mitochondrial dysfunction, endoplasmic reticulum stress, impaired calcium homeostasis, abnormal coronary microcirculation, activation of the sympathetic nervous system, activation of the renin–angiotensin–aldosterone system and maladaptive immune responses. These pathophysiological changes result in oxidative stress, fibrosis, hypertrophy, cardiac diastolic dysfunction and eventually systolic heart failure. This Review highlights a surge in diabetic cardiomyopathy research, summarizes current understanding of the molecular mechanisms underpinning this condition and explores potential preventive and therapeutic strategies.
Publisher
Nature Publishing Group UK,Nature Publishing Group
