[Biochemical diagnosis of Anderson-Fabry disease in two brothers].

Activity of several lysosomal enzymes was studied in leukocytes, blood plasma and skin fibroblasts of two adult brothers with clinical diagnosis of Fabry disease. Activity of ceramide trihexoside-galactosidase was distinctly decreased in both patients. The residual enzymatic activity constituted 5-6% in the patients leukocytes, less than 10% in blood plasma and 25% in fibroblasts as compared with controls. Differences in composition of alpha-D-galactosidase multiple forms were detected in fibroblasts and blood cells of the patients with Fabry disease as compared with normal leukocytes by means of isoelectric focusing.