Related Experiment Videos
Intimal laminated elastosis in the intrarenal arteries. An electron microscopic study
1Department of Pathology, Takeda General Hospital, Aizuwakamatsu, Japan.
Acta Pathologica Japonica
|March 1, 1988
Summary
Diabetic kidney disease causes elastic hyperplasia in arteries. Myointimal cells create new elastic tissue within the intima, forming thickened, laminated layers. Elastase digestion confirmed the elastic nature of this new tissue.
Area of Science:
- Nephrology
- Vascular Biology
- Pathology
Background:
- Diabetic nephropathy is a leading cause of kidney failure.
- Intrarenal artery changes contribute to diabetic kidney disease progression.
- Elastic hyperplasia, or laminated elastosis, is observed in diabetic kidney arteries.
Purpose of the Study:
- To investigate the morphogenesis of elastic hyperplasia in intrarenal arteries of diabetic patients.
- To elucidate the cellular and extracellular matrix components involved in this process.
Main Methods:
- Electron microscopy was utilized to examine kidney tissue from diabetic patients.
- Orcein staining was employed for electron microscopic visualization of elastic tissue.
- Elastase treatment was performed to characterize the newly formed elastic components.
Main Results:
- Myointimal cells in the thickened intima produced ground substance, collagen, and elastic tissue.
- Newly-formed elastic tissue initially appeared on basement membranes or similar materials.
- Aggregated elastic tissue formed concentric, thick laminae containing collagen fibrils.
- Elastase digested the newly-formed elastic tissue, leaving the microfibrillar component intact.
Conclusions:
- Myointimal cells are key players in the development of elastic hyperplasia in diabetic kidneys.
- The process involves the de novo synthesis and organization of elastic tissue within the arterial intima.
- Understanding this morphogenesis may offer insights into therapeutic targets for diabetic nephropathy.