Medium & long-chain acylcarnitine’s relation to lipid metabolism as potential predictors for diabetic cardiomyopathy: a metabolomic study

Lipids in Health and Disease

Dong-zhuo Wei¹  Xiao-lei Shen²  Chang Liu²  Dan-meng Zheng²  Zhen-ni An²  Ding-wen Jiang²  Xue-jiao Xing²  Ming-hao Ge³ 

[1] Department of Endocrinology, Liaoning University of Traditional Chinese Medicine, No.79, Chongshan East Road, Huanggu District, Shenyang, Liaoning Province, China;Department of Endocrinology, The First Affiliated Hospital of Jinzhou Medical University, No. 2, section 5, Renmin Street Guta District, Jinzhou, Liaoning Province, China;Department of Orthopedic, The First Affiliated Hospital of Jinzhou Medical University, No. 2, section 5, Renmin Street Guta District, Jinzhou, Liaoning Province, China;

关键词: Diabetic cardiomyopathy;    Metabolomics;    Acylcarnitine;    Lipid metabolism;    AMPK;   

DOI  :  10.1186/s12944-021-01576-9

来源: Springer

【 摘 要 】

BackgroundAcylcarnitine is an intermediate product of fatty acid oxidation. It is reported to be closely associated with the occurrence of diabetic cardiomyopathy (DCM). However, the mechanism of acylcarnitine affecting myocardial disorders is yet to be explored. This current research explores the different chain lengths of acylcarnitines as biomarkers for the early diagnosis of DCM and the mechanism of acylcarnitines for the development of DCM in-vitro.MethodsIn a retrospective non-interventional study, 50 simple type 2 diabetes mellitus patients and 50 DCM patients were recruited. Plasma samples from both groups were analyzed by high throughput metabolomics and cluster heat map using mass spectrometry. Principal component analysis was used to compare the changes occurring in the studied 25 acylcarnitines. Multivariable binary logistic regression was used to analyze the odds ratio of each group for factors and the 95% confidence interval in DCM. Myristoylcarnitine (C14) exogenous intervention was given to H9c2 cells to verify the expression of lipid metabolism-related protein, inflammation-related protein expression, apoptosis-related protein expression, and cardiomyocyte hypertrophy and fibrosis-related protein expression.ResultsFactor 1 (C14, lauroylcarnitine, tetradecanoyldiacylcarnitine, 3-hydroxyl-tetradecanoylcarnitine, arachidic carnitine, octadecanoylcarnitine, 3-hydroxypalmitoleylcarnitine) and factor 4 (octanoylcarnitine, hexanoylcarnitine, decanoylcarnitine) were positively correlated with the risk of DCM. Exogenous C14 supplementation to cardiomyocytes led to increased lipid deposition in cardiomyocytes along with the obstacles in adenosine 5′-monophosphate (AMP)-activated protein kinase (AMPK) signaling pathways and affecting fatty acid oxidation. This further caused myocardial lipotoxicity, ultimately leading to cardiomyocyte hypertrophy, fibrotic remodeling, and increased apoptosis. However, this effect was mitigated by the AMPK agonist acadesine.ConclusionsThe increased plasma levels in medium and long-chain acylcarnitine extracted from factors 1 and 4 are closely related to the risk of DCM, indicating that these factors can be an important tool for DCM risk assessment. C14 supplementation associated lipid accumulation by inhibiting the AMPK/ACC/CPT1 signaling pathway, aggravated myocardial lipotoxicity, increased apoptosis apart from cardiomyocyte hypertrophy and fibrosis were alleviated by the acadesine.

【 授权许可】

CC BY