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Lipoprotein abnormalities in diabetic nephropathy.

T Hirano1

  • 1First Department of Internal Medicine, Showa University School of Medicine, Tokyo, Japan. hirano@med.showa-u.ac.jp

Kidney International. Supplement
|July 21, 1999
PubMed
Summary

Diabetic nephropathy significantly alters plasma lipoproteins, increasing coronary heart disease risk. Key changes include elevated triglycerides, intermediate-density lipoprotein cholesterol, and smaller LDL size, even in early stages.

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Area of Science:

  • Cardiovascular Disease Research
  • Nephrology
  • Metabolic Disorders

Background:

  • Diabetic nephropathy substantially elevates coronary heart disease (CHD) mortality risk.
  • Understanding abnormal plasma lipoprotein profiles is crucial for managing this risk.

Purpose of the Study:

  • To define specific plasma lipoprotein abnormalities associated with increased CHD risk in diabetic nephropathy.
  • To compare lipoprotein profiles across different stages of diabetic nephropathy and in related kidney disease.

Main Methods:

  • Inclusion of middle-aged to older type 2 diabetic patients (normoalbuminuria, microalbuminuria, overt albuminuria).
  • Inclusion of nondiabetic patients with primary renal disease and healthy controls.
  • Analysis of plasma triglyceride (TG), intermediate-density lipoprotein (IDL), remnant-like particle (RLP) cholesterol, low-density lipoprotein (LDL) size, hepatic TG lipase (HTGL), lipoprotein lipase (LPL) mass, and von Willebrand factor (vWF).

Main Results:

  • Elevated TG, IDL, and RLP cholesterol in diabetic nephropathy, particularly with overt proteinuria.
  • Decreased HTGL levels inversely correlated with higher IDL in diabetic nephropathy.
  • Smaller LDL size and exaggerated postprandial lipemia observed in diabetic nephropathy.
  • Reduced LPL mass and increased vWF in microalbuminuria, suggesting endothelial damage.

Conclusions:

  • Plasma lipoprotein profiles in diabetic nephropathy become increasingly atherogenic, even in subclinical stages.
  • These changes contribute to the heightened cardiovascular risk associated with diabetic kidney disease.

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