期刊
NUTRITION RESEARCH
卷 32, 期 5, 页码 320-327出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.nutres.2012.03.010
关键词
Patients with type 1 and type 2 diabetes mellitus; Late complications; Neuropathy; Retinopathy; Nephropathy; L-Carnitine
资金
- European Social Fund [2009/0147/1DP/1.1.2.1.2/09/IPIA/VIAA/009]
- Latvian National Research Program BIOMEDICINE
Increased intake of L-carnitine, a cofactor in cellular energy metabolism, is recommended for diabetic patients with late complications. However, its clinical benefits remain controversial. We hypothesized that patients with low L-carnitine levels would have an increased rate of diabetic complications. To test this hypothesis, we evaluated the relationship of L-carnitine concentrations in blood with the prevalence and severity of late diabetic complications in type 1 and 2 diabetic patients. Human blood samples were collected from 93 and 87 patients diagnosed as having type 1 or type 2 diabetes, respectively, and 122 nondiabetic individuals. The determination of free L-carnitine concentrations in whole blood lysates was performed using ultra-performance liquid chromatography with tandem mass spectrometry. In diabetic patients, diabetic complications such as neuropathy, retinopathy, nephropathy, or hypertension were recorded. The average L-carnitine concentration in the blood of control subjects was 33 +/- 8 nmol/mL, which was not significantly different from subgroups of patients with type 1 (32 +/- 10 nmol/mL) or type 2 diabetes (36 +/- 11 nmol/mL). Patients with low (<20 nmol/mL) L-camitine levels did not have increased occurrences of late diabetic complications. In addition, patient subgroups with higher L-camitine concentrations did not have decreased prevalence of late diabetic complications. Our results provide evidence that higher L-carnitine concentrations do not prevent late diabetic complications in type 1 and 2 diabetic patients. (C) 2012 Elsevier Inc. All rights reserved.
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