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Clinical Chemistry 24: 1759-1761, 1978;
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Clinical Chemistry, Vol 24, 1759-1761, Copyright © 1978 by American Association for Clinical Chemistry

Increased D-glucaric acid excretion by jaundiced patients

M Herzberg and MH Wiener

The urinary excretion of D-glucaric acid, a catabolite of glucuronic acid, is considered to be a reliable index of the state of hepatic microsomal enzyme activity. Because enzyme activity may be altered in liver disease, we examined the effect of liver disease on the excretion of this metabolite and its correlation with liver function tests. We studied 89 patients with nonhemolytic jaundice, 39 with viral hepatitis, 33 with obstructive jaundice, six with cirrhosis, and 11 patients with jaundice of mixed etiology. Glucaric acid excretion was significantly increased in all these patients as compared to controls, most pronounced in the obstructive jaundice group. No correlation was found between glucaric acid excretion and concentrations of bilirubin, albumin, globulin, aspartate aminotransferase, alkaline phosphatase, cholesterol, or gamma-glutamyltransferase in serum, even though the concentrations of these analytes did vary with the type of liver disease. We suggest that this increase in glucaric acid excretion is an indication of normal or even increased glucuronidation (UDP- glucuronosyltransferase activity), which occurs in liver disease.




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Copyright © 1978 by the American Association for Clinical Chemistry.