Related Experiment Videos
Intraglomerular lipid deposition in routine biopsies
1Department of Pathology, College of Medicine, Seoul National University, Korea.
Clinical Nephrology
|August 1, 1991
Summary
Intraglomerular lipid deposition, particularly apolipoprotein B-containing lipoproteins, is common in nonsclerotic glomeruli, suggesting factors beyond hypercholesterolemia drive this process.
Area of Science:
- Nephrology
- Pathology
- Lipid Metabolism
Background:
- Lipids are implicated in the pathogenesis of chronic progressive glomerulosclerosis.
- Intraglomerular lipid deposition frequency in routine biopsies requires further investigation.
Purpose of the Study:
- To determine the prevalence of intraglomerular lipid deposition in nonsclerotic glomeruli using routine renal biopsies.
- To characterize the ultrastructural patterns and identify lipid components in these deposits.
Main Methods:
- Analysis of 631 renal biopsy samples using light, electron, and immunofluorescence microscopy.
- Ultrastructural examination for lipid deposits in nonsclerotic glomeruli.
- Immunofluorescence for apolipoprotein B (apo B) and Oil Red O (ORO) staining in 94 cases.
Main Results:
- Lipid deposits were found in 8.4% of patients (53/631) within nonsclerotic glomeruli.
- Ultrastructural analysis revealed subendothelial, mesangial, and intramembranous lipid accumulation, as well as intracellular fat.
- Apo B and ORO staining confirmed lipoprotein presence in 26% and 17% of cases, respectively.
- No significant differences in serum creatinine, cholesterol, or urinary protein excretion were observed between patients with lipid deposition and controls.
Conclusions:
- Abnormal accumulation of lipids, primarily apo B-containing lipoproteins, in nonsclerotic glomeruli is more frequent than previously assumed.
- Factors other than hypercholesterolemia likely contribute to glomerular lipid deposition.