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Journal Article
Research Support, Non-U.S. Gov't
Clinical evaluation of serum ornithine carbamoyltransferase by enzyme-linked immunosorbent assay in patients with liver diseases.
Enzyme & Protein 1994
We developed a sensitive enzyme-linked immunosorbent assay (ELISA) for serum ornithine carbamoyltransferase (OCT) protein, and examined serum OCT concentrations in patients with various liver diseases. OCT concentrations were markedly elevated in cases of hepatic encephalopathy, 'acute on chronic', and those with the acute phase of acute hepatitis, moderately in chronic hepatitis, liver cirrhosis, hepatocellular carcinoma, primary biliary cirrhosis, and slightly in those with a fatty liver. High percentages (92-98%) of patients with chronic hepatitis, liver cirrhosis and hepatocellular carcinoma had higher than normal concentrations of serum OCT protein. There was a close correlation with aspartate aminotransferase (AST) and alanine aminotransferase (ALT) activities and moderate correlations with those of mitochondrial AST, glutamate dehydrogenase and gamma-glutamyltranspeptidase. The OCT/ALT ratio was higher in patients with liver cirrhosis than in those with chronic hepatitis (p < 0.001), and was still higher in cases of hepatocellular carcinoma (p < 0.05). In 2 patients with 'acute on chronic' disease, OCT concentrations decreased similarly with or more rapidly than AST or ALT activities after admission. In 2 patients with hepatic encephalopathy, the OCT concentrations changed similarly with AST and ALT activities. This OCT ELISA system will aid in diagnosing various liver diseases and in the follow-up of the patients, and the OCT/ALT ratio may serve for a differential diagnosis of liver diseases.
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