Evaluation of the phenylalanine tolerance test in detection of heterozygote carriers of phenylketonuria gene
Bernat, K.
Polski Tygodnik Lekarski 47(9-10): 219-221
1992
ISSN/ISBN: 0032-3756 PMID: 1437822 Document Number: 403074
The study aimed at identifying heterozygotic phenylketonuria gene carriers with phenylalanine tolerance test performed in Lublin region. Serum phenylalanine concentration has been assayed during fasting and 1 and 2 hours following oral phenylalanine load in the dose of 0.1 g per 1 kg body weight. The study involved 203 individuals of the general population and 29 heterozygotes with phenylketonuria gene. Blood serum phenylalanine was assayed with Guthrie' technique. Statistical analysis has shown that hyperphenylalaninemia is relatively frequent in fasting individuals of the general population (59.1%). The same was demonstrated in 5 heterozygotes. Phenylalanine tolerance test did not allow to identify heterozygotic carries of phenylketonuria gene in the general population though fasting and after phenylalanine load increased blood serum levels of this amino acid are a criterium of hyperphenylalaninemia in the group of tested individuals (29%).