hexanoylcarnitine and Diabetes-Mellitus--Type-2

To identify the biomarkers in the critical period of development in diabetic retinopathy (DR) in Chinese with type 2 diabetes using targeted and untargeted metabolomics, and to explore the feasibility of their clinical application.. This case-control study described the differential metabolites between 83 Chinese type 2 diabetes mellitus (T2DM) samples with disease duration ≥ 10 years and 27 controls matched cases. Targeted metabolomics using high-resolution mass spectrometry with liquid chromatography was performed on plasma samples of subjects. The results were compared to our previous untargeted metabolomics study and ELISA was performed to validate the mutual differential metabolites of targeted and untargeted metabolomics on plasma. Multiple linear regression analyses were performed to adjust for the significance of different metabolites between groups.. Mean age of the subjects was 66.3 years and mean T2DM duration was 16.5 years. By cross-validating with results from previous untargeted metabolomic assays, we found that L-Citrulline (Cit), indoleacetic acid (IAA), 1-methylhistidine (1-MH), phosphatidylcholines (PCs), hexanoylcarnitine, chenodeoxycholic acid (CDCA) and eicosapentaenoic acid (EPA) were the most distinctive metabolites biomarkers to distinguish the severity of DR for two different metabolomic approaches in our study. We mainly found that samples in the DR stage showed lower serum level of Cit and higher serum level of IAA compared with samples in the T2DM stage, while during the progression of diabetic retinopathy, the serum levels of CDCA and EPA in PDR stage were significantly lower than NPDR stage. Among them, 4 differential key metabolites including Cit, IAA, CDCA and EPA were confirmed with ELISA.. This is the first study to compare the results of targeted and untargeted metabolomics

Topics: Aged; Biomarkers; Carnitine; Case-Control Studies; Chenodeoxycholic Acid; China; Citrulline; Diabetes Mellitus, Type 2; Diabetic Retinopathy; Eicosapentaenoic Acid; Enzyme-Linked Immunosorbent Assay; Humans; Metabolomics; Phosphatidylcholines

Specific circulating metabolites have emerged as important risk factors for the development of diabetes. The acylcarnitines (acylCs) are a family of metabolites known to be elevated in type 2 diabetes (T2D) and linked to peripheral insulin resistance. However, the effect of acylCs on pancreatic β-cell function is not well understood. Here, we profiled circulating acylCs in two diabetes cohorts:

Topics: Adult; Animals; Carnitine; Case-Control Studies; Cell Respiration; Diabetes Mellitus, Type 2; Diabetes, Gestational; Disease Progression; Female; Glucose Intolerance; Humans; Insulin; Insulin Secretion; Insulin-Secreting Cells; Islets of Langerhans; Mice; Postpartum Period; Pregnancy