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Phenylketonuria is inherited in an autosomal recessive fashion. PKU is an autosomal recessive metabolic genetic disorder. As an autosomal recessive disorder, two PKU alleles are required for an individual to experience symptoms of the disease. For a child to inherit PKU, both parents must have and pass on the defective gene. [17]
Lofenalac (pronunciation:Lo-fen-alac) is a registered, trademarked infant powder formula prescribed to replace milk in the diets of phenylketonuria sufferers in the infant and child stage. It is not recommended for non-PKU patients. [2] In 1972, Lofenalac was declared a food by the FDA, for regulatory purposes. [3]
Previously, it was thought safe to withdraw from the diet in the late teens or early twenties, after the central nervous system was fully developed; recent studies suggest some degree of relapse, and a continued phenylalanine-restricted diet is now recommended. [4] PKU or hyperphenylalaninemia may also occur in persons without the PKU genotype.
E.g., reduction of dietary protein remains a mainstay of treatment for phenylketonuria and other amino acid disorders; Dietary supplementation or replacement E.g., oral ingestion of cornstarch several times a day helps prevent people with glycogen storage diseases from becoming seriously hypoglycemic. Medications
Infants with PKU appear normal at birth, but are unable to metabolize the essential amino acid phenylalanine, resulting in irreversible intellectual disability. In the 1960s, Robert Guthrie developed a simple method using a bacterial inhibition assay that could detect high levels of phenylalanine in blood shortly after a baby was born.
Untreated PKU results in irreversible neurological damage. [1] After the discovery of PKU as a cause of mental retardation, Horst Bickel and colleagues discovered that it could be treated successfully with a diet low in phenylalanine. [7] The main drawback in successful treatment of PKU was the delay in identifying affected individuals.
Following the BRAT diet or the bland diet is a form of self-care to ensure you are eating easy-to-digest foods and obtain some nutrients while your body is under GI distress.
Phenylketonuria, also known as PKU, can induce neurodevelopmental problems and children with PKU require a strict diet to prevent intellectual disability and other disorders. In the maternal form of PKU, excessive maternal phenylalanine can be absorbed by the fetus even if the fetus has not inherited the disease. This can produce intellectual ...