Podocyte foot process broadening in experimental diabetic nephropathy: amelioration with renin-angiotensin blockade
| Autor: | Richard E. Gilbert, Jennifer L. Wilkinson-Berka, Mark E. Cooper, Terri J. Allen, John F. Bertram, Darren J. Kelly, Sally Mifsud, U L Hulthen |
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| Rok vydání: | 2001 |
| Předmět: |
Male
Ramipril medicine.medical_specialty Endocrinology Diabetes and Metabolism Kidney Glomerulus Tetrazoles Angiotensin-Converting Enzyme Inhibitors Blood Pressure Kidney Basement Membrane Diabetes Mellitus Experimental Nephropathy Podocyte Rats Sprague-Dawley Renin-Angiotensin System Diabetic nephropathy Internal medicine Internal Medicine medicine Animals Humans Antihypertensive Agents biology business.industry Glomerular basement membrane Valine Angiotensin-converting enzyme Organ Size medicine.disease Angiotensin II Rats Disease Models Animal medicine.anatomical_structure Endocrinology Valsartan Disease Progression biology.protein business medicine.drug |
| Zdroj: | Diabetologia. 44:878-882 |
| ISSN: | 1432-0428 0012-186X |
| DOI: | 10.1007/s001250100561 |
| Popis: | Aims/hypothesis. Changes in podocyte number and morphology have been implicated in the pathogenesis of proteinuria and the progression of human and experimental kidney disease. This study sought to examine podocyte foot process and slit pore architecture in experimental diabetic nephropathy and to determine whether such changes were modified with renoprotective intervention by blockade of the renin-angiotensin system. Methods. The number of filtration slits per 100 μm of glomerular basement membrane was assessed by transmission electron microscopy and quantitated histomorphometrically in control animals and in rats with 24 weeks of streptozotocin-induced diabetes. Diabetic rats were either untreated or received the angiotensin converting enzyme inhibitor ramipril, or the angiotensin II type 1 receptor antagonist, valsartan. Results. When compared with control animals, diabetes was associated with a decrease in the number of slit pores per unit length of glomerular basement membrane, indicative of podocyte foot process broadening. Both ramipril and valsartan attenuated these ultrastructural changes to a similar degree. These differences remained after correcting for glomerular volume as a possible confounding variable. Conclusion/interpretation. Preservation of podocyte architecture could contribute to the renoprotective effects of renin-angiotensin system blockade in diabetic nephropathy. [Diabetologia (2001) 44: 878–882] |
| Databáze: | OpenAIRE |
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