Phenylketonuria Clinical Trial
Official title:
Application of Stable Isotopes to Determine Protein Requirements in Children With Phenylketonuria (PKU)
Phenylketonuria (PKU) is an inherited inborn error of an amino acid phenylalanine (PHE)
metabolism affecting 1:15,000 births. It is caused by a decreased activity of an enzyme in
the liver called phenylalanine hydroxylase (PAH) which is important to convert PHE into
tyrosine, another amino acid. Consequently, PHE accumulates in the blood leading to mental
and developmental delays. Nutritional management is the primary choice of treatment that
includes providing sufficient protein in the diet and at the same time restricting PHE.
However the amount of protein to be given is unknown. A new technique called Indicator Amino
Acid Oxidation (IAAO) will be used to determine the protein requirements in children with PKU
(5-18y). The study will help treat and manage these children with sufficient protein to
ensure proper growth and development. Current dietary recommendations range from 35-65 g/day
and is based on factorial calculations.
The investigators hypothesize that the protein requirement in children with PKU will be
higher than the current mathematically calculated recommended intake of 35-65 g/day for the
5-18y children.
n/a
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