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Mol Cells. 2000 Dec 31;10(6):692-4.

The first successful prenatal diagnosis on a Korean family with citrullinemia.

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Department of Biochemistry, Wonkwang University College of Medicine, Iksan, Korea.


DNA prenatal diagnosis was successfully performed on a family with citrullinemia. The father carried the G324S mutation and the mother carried the IVS6-2A > G mutation in the argininosuccinate synthase gene. They had a previous child with citrullinemia who died in the week after birth owing to complicated hyperammonemia. The lost child turned out to be a compound heterozygote. DNA was extracted from the cultured amniotic cells after amniocentesis done at 18-week gestation. For the detection of the G324S mutation, the PCR and restriction fragment length polymorphism method was used, and for the IVS6-2A > G mutation, allele-specific PCR was performed. The fetus was found to carry G324S but not IVS6-2A > G, suggesting a heterozygote carrier. Pregnancy was continued and a healthy boy was born. Plasma amino acid analysis performed on the third day after birth was normal and the serial ammonia level was in the normal range. A molecular study on his genomic DNA after birth also agreed with the previous fetal DNA analysis. He is now 2-months old with normal growth and development.

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