Abstract
The present study was designed to investigate the physicochemical properties of canine alpha-1-acid glycoprotein (AGP), and to establish a method for measuring serum AGP in canine. Fifty-three normal beagles were used in the study. AGP was purified from normal canine sera by successive ammonium sulfate precipitation, ion-exchange chromatography and gel filtration. The serum AGP concentration was measured by single radial immunodiffusion (SRID). Canine AGP had a molecular weight of 42,000 +/- 2,000 Da and contained 40.9% carbohydrate. Gel isoelectric focusing revealed microheterogeneity with 6-7 bands in a pI range (isoelectric points) of 3.2-3.8. AGP migrated to the alpha1-globulin region on immunoelectrophoresis. The serum AGP level of 35 normal beagles was 283.4 +/- 113.3 microg/ml. Canine AGP was isolated, and its physicochemical properties were clarified. SRID may be a useful method for quantification of serum AGP in canine.
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