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- W2158398528 abstract "Cardiovascular complications are a well-known feature of chronic renal failure. Increased wall thickness of intramyocardial arterioles and elastic (aorta) and peripheral (mesenteric) arteries is seen even after normalization of blood pressure. It is currently unknown whether such increases result from hyperplasia of vascular smooth muscle cells, hypertrophy, or a combination of both or from an increase in aortic extracellular matrix. Using a recently developed unbiased stereological technique (the dissector), we investigated the aortas of subtotally nephrectomized rats and sham-operated controls after perfusion fixation. We determined aortic wall thickness, cross-sectional area of aortic media, total number of vascular smooth muscle cells per unit aortic length (1 mm), mean cell and nuclear volumes, volume density of elastic fibers, extracellular matrix, vascular smooth muscle cells, and total volumes of these structures per unit of aortic length (1 mm). Blood pressure was not significantly increased in subtotally nephrectomized rats. In contrast, wall thickness, cross-sectional media, total number of aortic vascular smooth muscle cells, and volume of extracellular matrix including collagen were significantly increased after subtotal nephrectomy, whereas cellular hypertrophy was only modest and an increase in elastic fibers did not occur. In conclusion, increased aortic wall thickness in experimental renal failure results primarily from an increase in aortic extracellular matrix. In addition, however, proliferation of aortic vascular smooth muscle cells resulting in cell hyperplasia also contributed to aortic wall thickening to a minor degree. It appears that aortic wall thickening is caused by secretory stimulation of the proliferating vascular smooth muscle cells, resulting in increased matrix production. The nature of the underlying stimulus requires further investigation." @default.
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- W2158398528 date "1997-03-01" @default.
- W2158398528 modified "2023-10-14" @default.
- W2158398528 title "Aortic Changes in Experimental Renal Failure" @default.
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- W2158398528 doi "https://doi.org/10.1161/01.hyp.29.3.770" @default.
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