Serum Leucine Aminopeptidase
- 1 January 1962
- journal article
- research article
- Published by American Medical Association (AMA) in American Journal of Diseases of Children
- Vol. 103 (1) , 47-54
- https://doi.org/10.1001/archpedi.1962.02080020051008
Abstract
Histochemical studies of adult liver for leucine aminopeptidase (LAP) utilizing the synthetic substrate L-leucyl-β-naphthylamide show intense activity in the bile duct epithelium and a weaker reaction in the parenchymal cells.1,2We have also observed high activity in the proliferating bile ducts of liver biopsies from 4 infants with biliary atresia. This intense activity in the bile ducts and the observation that LAP is excreted by the liver into the bile appear to explain the high serum LAP activity resulting from extrahepatic or intrahepatic biliary obstruction.1,3Diagnostically significant elevations of serum LAP have been shown to relate almost exclusively to diseases of the liver, bile ducts, or pancreas.1,3-6 The normal range of enzymatic activity in infants has not been described and the clinical usefulness of serum LAP elevations in infants with hepatobiliary disease has not been assessed. By adult standards, LAP levels have been reported to be normalKeywords
This publication has 1 reference indexed in Scilit:
- The Measurement of Activity of Leucine Aminopeptidase in Serum, Urine, Bile, and TissuesAmerican Journal of Clinical Pathology, 1959