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Lipid disorders in type 1 diabetes.
1Service d'endocrinologie, de diabétologie et des maladies métaboliques, hôpital du Bocage, Dijon, France. bruno.verges@chu-dijon.fr
Diabetes & Metabolism
|September 8, 2009
Summary
Type 1 diabetes (T1D) patients exhibit lipid disorders, including abnormal lipoproteins even with good glycemic control. These changes may increase cardiovascular disease risk, but require further investigation.
Area of Science:
- Endocrinology
- Lipidology
- Cardiovascular Science
Background:
- Type 1 diabetes (T1D) is frequently associated with lipid disorders.
- Both quantitative and qualitative lipoprotein abnormalities occur in T1D patients, influenced by glycemic control and nephropathy.
Purpose of the Study:
- To investigate the quantitative and qualitative abnormalities of lipoproteins in patients with Type 1 Diabetes.
- To explore the functional consequences of these lipoprotein alterations.
Main Methods:
- Analysis of lipoprotein profiles (triglycerides, LDL cholesterol, HDL cholesterol) in T1D patients.
- Assessment of lipoprotein composition, including VLDL, LDL, and HDL.
- Evaluation of in vitro functional effects of T1D lipoproteins on cellular cholesterol metabolism and vascular properties.
Main Results:
- T1D patients show altered lipoprotein levels, particularly with poor glycemic control or nephropathy.
- Qualitative abnormalities like increased VLDL cholesterol-to-triglyceride ratios, triglyceride-rich LDLs and HDLs, LDL oxidation, and small, dense LDL particles are present even in well-controlled T1D.
- T1D-derived VLDL and LDL induce abnormal macrophage cholesterol metabolism; T1D HDL exhibits reduced cholesterol efflux, antioxidative, and vasorelaxant properties.
Conclusions:
- Lipoprotein abnormalities in T1D are complex, involving both quantitative and qualitative changes.
- These qualitative changes, potentially linked to hyperinsulinaemia, may impair lipoprotein function and contribute to cardiovascular risk.
- Further research is needed to determine the exact impact of these lipid alterations on cardiovascular disease development in T1D.
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