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http://dx.doi.org/10.5115/acb.2011.44.3.176

Psammomys obesus, a particularly important animal model for the study of the human diabetic nephropathy  

Scherzer, Pnina (Nephrology and Hypertension Unit, Hadassah University Hospital)
Katalan, Shachaf (Nephrology and Hypertension Unit, Hadassah University Hospital)
Got, Gay (Nephrology and Hypertension Unit, Hadassah University Hospital)
Pizov, Galina (Department of Pathology, Hadassah University Hospital)
Londono, Irene (Department of Pathology and Cell Biology, Montreal Diabetes Center, University of Montreal)
Gal-Moscovici, Anca (Nephrology and Hypertension Unit, Hadassah University Hospital)
Popovtzer, Mordecai M. (Southern Arizona VA Health Care System)
Ziv, Ehud (Diabetes Unit, Hadassah University Hospital)
Bendayan, Moise (Department of Pathology and Cell Biology, Montreal Diabetes Center, University of Montreal)
Publication Information
Anatomy and Cell Biology / v.44, no.3, 2011 , pp. 176-185 More about this Journal
Abstract
The Psammomys obesus lives in natural desert habitat on low energy (LE) diet, however when maintained in laboratory conditions with high energy (HE) diet it exhibits pathological metabolic changes resembling those of type 2 diabetes. We have evaluated and correlated the histopathology, metabolic and functional renal alterations occurring in the diabetic Psammomys. Renal function determined by measuring glomerular filtration rate (GFR), protein excretion, protein/creatinine ratio and morpho-immunocytochemical evaluations were performed on HE diet diabetic animals and compared to LE diet control animals. The diabetic animals present a 54% increase in GFR after one month of hyperglycemic condition and a decrease of 47% from baseline values after 4 months. Protein excretion in diabetic animals was 5 folds increased after 4 months. Light microscopy showed an increase in glomeruli size in the diabetic Psammomys, and electron microscopy and immunocytochemical quantitative evaluations revealed accumulation of basement membrane material as well as frequent splitting of the glomerular basement membrane. In addition, glycogen-filled Armanni-Ebstein clear cells were found in the distal tubules including the thick ascending limbs of the diabetic animals. These renal complications in the Psammomys, including changes in GFR with massive proteinuria sustained by physiological and histopathological changes, are very similar to the diabetic nephropathy in human. The Psamommys obesus represents therefore a reliable animal model of diabetic nephropathy.
Keywords
Diabetic nephropathies; Psammomys; Glycogen nephrosis;
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