Abstract:The effects of intrarenal administration of isoproterenol on excretion of urinary enzymes were examined in dogs. Urinary N-acetyl-β-D-glucosaminidase (NAG) and glutamyl transpeptidase (γ-GTP) originated from lysosomes and the brush border membrane of the kidney, respectively. NAG excretion was elevated for 10 min by isoproterenol (0.2 µg/kg/min) without a drastic change in glomerular filtration rate and renal blood flow. This elevation was inhibited by pretreatment with d, l-propranolol (0.6 mg/kg bolus inject… Show more
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