Intracellular diglycerides in relation to glycaemic control in the myocardium: A pilot study in humans

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• 作者：C.A. Anastasiou^a ; A. Stamatelopoulos^a ; ^b ; P. Dedeilias^b ; C. Charitos^b ; L.S. Sidossis^a ; ^c ; S.A. Kavouras^a ; ^d ; ^{Kavouras@uark.edu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Diabetes ; Diglycerides ; Heart ; Insulin resistance ; Myocardium
• 刊名：Diabetes & Metabolism
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：41
• 期：5
• 页码：422-424
• 全文大小：518 K

文摘

Intramyocellular diglycerides have been implicated in the development of insulin resistance in skeletal muscle. In the myocardium, excess lipid storage may also contribute to the appearance of diabetic cardiomyopathy, while diglycerides may have certain cardio-protective functions. However, little is known on intracellular diglyceride accumulation in the human heart. We aimed to determine diglyceride accumulation in the human myocardium in relation to diabetes status.

Methods

Six diabetic and six non-diabetic aged human subjects undergoing by-pass surgery participated in the study. Subjects were matched for age and body mass index. Intracellular diglyceride levels were measured in heart biopsy samples. Additional samples were taken from pectoralis major muscle that served as control. Whole body glycaemic control was assessed as the percent glycated haemoglobin.

Results

Intracellular diglycerides were significantly higher in the myocardium compared to pectoralis major (P < 0.05). Although not statistically significant, diabetic subjects tended to accumulate smaller amounts of diglycerides compared to non-diabetic subjects in the myocardium. A linear negative correlation was observed between myocardial diglycerides and glycaemic control (r = 0.632, P < 0.05).

Conclusions

Our data suggest that poor glycaemic control and diabetes may be associated with a defective accumulation of myocardial diglycerides, possibly blunting intracellular processes and contributing to the development of cardiomyopathy.