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Bayrasheva VK, Babenko AY, Dobronravov VA, Dmitriev YV, Chefu SG, Pchelin IY, Ivanova AN, Bairamov AA, Alexeyeva NP, Shatalov IS, Grineva EN. Uninephrectomized High-Fat-Fed Nicotinamide-Streptozotocin-Induced Diabetic Rats: A Model for the Investigation of Diabetic Nephropathy in Type 2 Diabetes. J Diabetes Res 2016; 2016:8317850. [PMID: 28090542 PMCID: PMC5206480 DOI: 10.1155/2016/8317850] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 10/30/2016] [Accepted: 11/08/2016] [Indexed: 12/18/2022] Open
Abstract
Type 2 diabetes (DM2) could be reproduced in rats with alimentary obesity by using low doses of streptozotocin (LD-STZ) as well as STZ in high doses with preliminary nicotinamide (NA) administration. However, STZ could induce tubulotoxicity. Aim. To develop rat model of DN in NA-STZ-induced DM2 and compare it with LD-STZ-model in order to choose the most relevant approach for reproducing renal glomerular and tubular morphofunctional diabetic changes. Starting at 3 weeks after uninephrectomy, adult male Wistar rats were fed five-week high-fat diet and then received intraperitoneally either LD-STZ (40 mg/kg) or NA (230 mg/kg) followed by STZ (65 mg/kg). Control uninephrectomized vehicle-injected rats received normal chow. At weeks 10, 20, and 30 (the end of the study), metabolic parameters, creatinine clearance, albuminuria, and urinary tubular injury markers (NGAL, KIM-1) were evaluated as well as renal ultrastructural and light microscopic changes at weeks 20 and 30. NA-STZ-group showed higher reproducibility and stability of metabolic parameters. By week 10, in NA-STZ-group NGAL level was significantly lower compared to LD-STZ-group. By week 30, diabetic groups showed early features of DN. However, morphofunctional changes in NA-STZ-group appeared to be more pronounced than those in STZ-group despite lower levels of KIM-1 and NGAL. We proposed a new rat model of DM2 with DN characterized by stable metabolic disorders, typical renal lesions, and lower levels of tubular injury markers as compared to LD-STZ-induced diabetes.
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Affiliation(s)
- Valentina K. Bayrasheva
- Institute of Endocrinology, Federal Almazov North-West Medical Research Centre, Saint Petersburg, Russia
- Department for Pathophysiology, Pavlov First Saint Petersburg State Medical University, Saint Petersburg, Russia
- *Valentina K. Bayrasheva:
| | - Alina Yu. Babenko
- Institute of Endocrinology, Federal Almazov North-West Medical Research Centre, Saint Petersburg, Russia
| | - Vladimir A. Dobronravov
- Research Institute of Nephrology, Pavlov First Saint Petersburg State Medical University, Saint Petersburg, Russia
| | - Yuri V. Dmitriev
- Institute of Experimental Medicine, Federal Almazov North-West Medical Research Centre, Saint Petersburg, Russia
| | - Svetlana G. Chefu
- Department for Pathophysiology, Pavlov First Saint Petersburg State Medical University, Saint Petersburg, Russia
- Institute of Experimental Medicine, Federal Almazov North-West Medical Research Centre, Saint Petersburg, Russia
| | | | - Alexandra N. Ivanova
- Saint Petersburg State University, Saint Petersburg, Russia
- Komarov Botanical Institute of the Russian Academy of Sciences, Saint Petersburg, Russia
| | - Alekber A. Bairamov
- Institute of Endocrinology, Federal Almazov North-West Medical Research Centre, Saint Petersburg, Russia
| | - Nina P. Alexeyeva
- Department of Statistical Modelling, Mathematics and Mechanics Faculty, Saint Petersburg State University, Saint Petersburg, Russia
| | - Ivan S. Shatalov
- Saint Petersburg National Research University of Information, Technologies, Mechanics and Optics, Saint Petersburg, Russia
| | - Elena N. Grineva
- Institute of Endocrinology, Federal Almazov North-West Medical Research Centre, Saint Petersburg, Russia
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Piepsz A, Prigent A, Hall M, Ismaili K, Collier F, Ham H. At what level of unilateral renal impairment does contralateral functional compensation occur? Pediatr Nephrol 2005; 20:1593-8. [PMID: 16079984 DOI: 10.1007/s00467-005-1974-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2005] [Revised: 03/29/2005] [Accepted: 03/29/2005] [Indexed: 10/25/2022]
Abstract
Functional compensation occurs in a kidney when the function of the contralateral kidney is decreased or absent. What is, however, not documented is the level of unilateral renal impairment at which functional compensation occurs. Split function, as obtained from a radionuclide renogram, can only show the asymmetry between both kidneys. The aim of the present work was to evaluate at what level of unilateral impairment a functional compensation can be observed in the contralateral normal kidney. From a large database, 180 children over 2 years of age with unilateral pathology were retrospectively selected. All of them underwent a radionuclide study, combining a technetium-99m mercaptoacetyltriglycine (Tc-99m MAG3) renogram associated with a chromium-51 ethylenediaminetetraacetic acid (Cr-51 EDTA) overall clearance, allowing a precise estimation of single-kidney glomerular filtration rate (SKGFR). Below 30-35 ml/min/1.73 m2, there was a significant inverse correlation between SKGFR on the normal and the abnormal side. Above this level, no such correlation was observed, the mean SKGFR on the normal side remaining around 58 ml/min/1.73 m2, whatever the value of SKGFR on the abnormal side. In pediatric patients, hyperfunction occurs when SKGFR of the diseased kidney is below 30-35 ml/min/1.73 m2.
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Affiliation(s)
- Amy Piepsz
- Department of Nuclear Medicine, Centre Hospitalo-Universitaire St Pierre, Brussels, Belgium.
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