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American Journal of Pathology, Vol 80, 129-142, Copyright © 1975 by American Society for Investigative Pathology

REGULAR ARTICLES

Pathologic findings and laboratory data in a new strain of obese hypertensive rats

S Koletsky

A new strain of rat characterized by genetic obesity, endogenous hyperlipidemia, and hypertension was obtained in this laboratory. The abnormal phenotype is inherited as a homozygous recessive trait. The animals exhibit marked hypertriglyceridemia, moderate hypercholesterolemia, and an electrophoretic pattern resembling that of human Type IV hyperlipoproteinemia. The average life-span is less than 1 year, due largely to the development of premature renal and vascular disease. The kidney lesion has both glomerulonephritic and nephrosclerotic components and is accompanied by marked proteinuria. About 12% of animals develop urinary tract calculi. The vascular disease consists of fibrous and fatty-fibrous intimal plaques, and polyarteritis. The obese animal offers a useful model for investigating abnormal lipid metabolism and the etiology and pathogenesis of atherosclerosis.


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Copyright © 1975 by the American Society for Investigative Pathology.