Clinical significance of plasma galactose and erythrocyte galactose-1-phosphate measurements in transferase-deficient galactosemia and in individuals with below-normal transferase activity.
We correlated the clinical symptoms of transferase-deficient galactosemia with the plasma galactose and erythrocyte galactose-1-phosphate concentrations in six galactosemic patients during dietary treatment, in a child before treatment, and in 12 individuals with below-normal erythrocyte hexose-1-phosphate uridylyltransferase activity. All the treated patients were asymptomatic. Normal galactose and either normal or above-normal galactose-1-phosphate concentrations were found. Three of these patients were clinically normal as newborns while ingesting galactose-containing foods and may resemble the asymptomatic Negro galactosemic. The clinical symptoms of galactosemia were observed in the untreated patient, who showed markedly above-normal concentrations of galactose and galactose-1-phosphate, protein and reducing substances in the urine, above-normal bilirubin and alkaline phosphatase in the plasma, with normal values for glucose, aspartate aminotransferase, alanine aminotransferase, and gamma-glutamyltransferase. Clinical improvement in this patient paralleled the decline in erythrocyte galactose-1-phosphate. The individuals with below-normal hexose-1-phosphate uridylyltransferase activity (range 7--17 U/g of hemoglobin) had normal galactose and galactose-1-phosphate concentrations and were asymptomatic.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004912:Erythrocytes / Q000032:analysis; D005260:Female; D005693:Galactosemias / Q000097:blood* / Q000178:diet therapy / Q000201:enzymology* / Q000503:physiopathology; D005695:Galactosephosphates / Q000097:blood*; D006600:Hexosephosphates / Q000097:blood*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D009713:Nucleotidyltransferases / Q000172:deficiency*; D010949:Plasma / Q000032:analysis; D006599:UDPglucose-Hexose-1-Phosphate Uridylyltransferase / Q000172:deficiency*
D005695:Galactosephosphates; D006600:Hexosephosphates; C029973:galactose-1-phosphate; D009713:Nucleotidyltransferases; D006599:UDPglucose-Hexose-1-Phosphate Uridylyltransferase