Oligophrenia phenylpyruvica

PKU - phenylketonuria

PAH-gene related phenylketonuria

PAH (phenylalanine hydroxylase) deficiency

Folling disease

Phenylalanine hydroxylase deficiency

A rare inborn error of amino acid metabolism with characteristics of elevated blood phenylalanine and low levels or absence of phenylalanine hydroxylase enzyme. If not detected early or left untreated, the disorder manifests with mild to severe mental disability. The most common form of the condition is known as classical phenylketonuria and has severe symptoms. A mild form has also been described (mild PKU), and an even milder form known as mild hyperphenylalaninaemia (mild HPA or non-PKU HPA). A subset of patients with milder phenotypes has been found to be responsive to tetrahydrobiopterin (BH4), the cofactor of phenylalanine hydroxylase (BH4-responsive HPA). The disease is caused by a wide range of variants in the PAH gene (12q22-q24.2) coding for phenylalanine hydroxylase. Transmission is autosomal recessive.

A rare inborn error of amino acid metabolism with characteristics of elevated blood phenylalanine and low levels or absence of phenylalanine hydroxylase enzyme. If not detected early or left untreated, the disorder manifests with mild to severe mental disability. The most common form of the condition is known as classical phenylketonuria and has severe symptoms. A mild form has also been described (mild PKU), and an even milder form known as mild hyperphenylalaninemia (mild HPA or non-PKU HPA). A subset of patients with milder phenotypes has been found to be responsive to tetrahydrobiopterin (BH4), the cofactor of phenylalanine hydroxylase (BH4-responsive HPA). The disease is caused by a wide range of variants in the PAH gene (12q22-q24.2) coding for phenylalanine hydroxylase. Transmission is autosomal recessive.

Phenylketonuria