Clinical Chemistry
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Clinical Chemistry 29: 1717-1719, 1983;
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Clinical Chemistry, Vol 29, 1717-1719, Copyright © 1983 by American Association for Clinical Chemistry

Assay of urinary N-acetyl-beta-glucosaminidase in a centrifugal analyzer

SC Powell, J Scaro, E Wilson and ZK Shihabi

We describe a kinetic, fluorometric assay for urinary N-acetyl-beta- glucosaminidase (EC 3.2.1.30) by measurement of the release of 4- methylumbelliferone (7-hydroxy-4-methylcoumarin). The method is simple, involving only a single reagent, and is applicable to the assay of other enzymes that hydrolyze similar fluorescent-labeled substrates. The enzyme distribution in human tissues and fluids is described. The enzyme is present in high concentrations in human kidney, liver, and lung. Its concentration in urine is shown to be a sensitive indicator of early renal damage, which precedes changes in serum creatinine and urinary protein. Assay of the enzyme is quite useful in monitoring renal damage due to myoglobinuria.




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Copyright © 1983 by the American Association for Clinical Chemistry.