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No aggravation of renal injury in apolipoprotein E knockout mice (ApoE(-/-)) after subtotal nephrectomy. 2004

Moriz Buzello, and Christian Stefan Haas, and Frank Hauptmann, and Marie Luise Gross, and Jörg Faulhaber, and Stefan Schultze-Mosgau, and Heimo Ehmke, and Eberhard Ritz, and Kerstin Amann
Department of Pathology, University of Heidelberg, Germany.

BACKGROUND There is substantial experimental evidence that various forms of dyslipidaemia aggravate the course of renal failure and that reversal of dyslipidaemia ameliorates progression of renal failure. The apolipoprotein E knockout mouse (ApoE(-/-)) is an established model of accelerated atherogenesis. We investigated whether the course of renal disease after uninephrectomy (UNX) and subtotal nephrectomy (SNX) is altered in ApoE(-/-) mice compared with their genetic controls. METHODS Ten-week-old, male ApoE(-/-) mice (body weight 25+/-2 g) were subjected either to sham operation (sham), UNX or SNX. C57BL/6 sham, UNX and SNX mice served as controls (body weight 26+/-3 g). The food intake of ApoE(-/-) and C57BL/6 mice was kept identical by a pair-feeding protocol. After 12 weeks, mean arterial blood pressure and heart rate were measured in awake resting mice, the kidneys were perfusion fixed and analysed using quantitative histological methods, immunohistochemistry and RT-PCR. RESULTS At baseline, the sham ApoE(-/-) mice had significantly higher (P<0.05) serum cholesterol and triglycerides than the controls. In parallel, mean arterial blood pressure was significantly elevated in sham ApoE(-/-) mice compared with controls (137+/-15 vs 116+/-4 mmHg; P<0.05). In the sham groups, the glomerulosclerosis index was significantly higher in the ApoE(-/-) mice (1.05+/-0.14 vs 0.57+/-0.07; P<0.05), whereas the tubulointerstitial damage score was comparable (0.06+/-0.04 vs 0.04+/-0.02; n.s.). After SNX there was a significant increase in glomerulosclerosis index, but no difference could be detected between ApoE(-/-) and controls (1.75+/-0.16 vs 1.61+/-0.01, n.s.). The same was true for the tubulointerstitial damage index. CONCLUSIONS Despite some glomerulosclerosis and elevated mean arterial blood pressure at baseline, no acceleration of progression of renal disease was found in this genetic model of hyperlipoproteinaemia. This observation suggests that despite the known spontaneous histological changes in untouched kidneys, however, the presence of hyperlipidaemia in the ApoE(-/-) mouse does not cause more severe progression in the present models of moderate renal disease.

UI MeSH Term Description Entries
D007678 Kidney Glomerulus A cluster of convoluted capillaries beginning at each nephric tubule in the kidney and held together by connective tissue. Glomerulus, Kidney
D008297 Male Males
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D009392 Nephrectomy Excision of kidney. Heminephrectomy,Heminephrectomies,Nephrectomies
D004195 Disease Models, Animal Naturally-occurring or experimentally-induced animal diseases with pathological processes analogous to human diseases. Animal Disease Model,Animal Disease Models,Disease Model, Animal
D005923 Glomerulosclerosis, Focal Segmental A clinicopathological syndrome or diagnostic term for a type of glomerular injury that has multiple causes, primary or secondary. Clinical features include PROTEINURIA, reduced GLOMERULAR FILTRATION RATE, and EDEMA. Kidney biopsy initially indicates focal segmental glomerular consolidation (hyalinosis) or scarring which can progress to globally sclerotic glomeruli leading to eventual KIDNEY FAILURE. Glomerulonephritis, Focal Sclerosing,Hyalinosis, Segmental Glomerular,Focal Segmental Glomerulosclerosis,Glomerulosclerosis, Focal,Hyalinosis, Segmental,Segmental Glomerular Hyalinosis,Focal Glomerulosclerosis,Focal Sclerosing Glomerulonephritides,Focal Sclerosing Glomerulonephritis,Glomerular Hyalinosis, Segmental,Glomerulonephritides, Focal Sclerosing,Sclerosing Glomerulonephritides, Focal,Sclerosing Glomerulonephritis, Focal,Segmental Glomerulosclerosis, Focal,Segmental Hyalinosis
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D001057 Apolipoproteins E A class of protein components which can be found in several lipoproteins including HIGH-DENSITY LIPOPROTEINS; VERY-LOW-DENSITY LIPOPROTEINS; and CHYLOMICRONS. Synthesized in most organs, Apo E is important in the global transport of lipids and cholesterol throughout the body. Apo E is also a ligand for LDL receptors (RECEPTORS, LDL) that mediates the binding, internalization, and catabolism of lipoprotein particles in cells. There are several allelic isoforms (such as E2, E3, and E4). Deficiency or defects in Apo E are causes of HYPERLIPOPROTEINEMIA TYPE III. Apo-E,Apo E,Apo E Isoproteins,ApoE,Apolipoprotein E Isoproteins,Apoprotein (E),Apoproteins E,Isoproteins, Apo E,Isoproteins, Apolipoprotein E
D013997 Time Factors Elements of limited time intervals, contributing to particular results or situations. Time Series,Factor, Time,Time Factor
D051379 Mice The common name for the genus Mus. Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus

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