phenylketonuria

[ fen-l-kee-toh-noor-ee-uh, -nyoor-, feen- ]

noun

, Pathology.

1. an inherited disease due to faulty metabolism of phenylalanine, characterized by phenyl ketones in the urine and usually first noted by signs of intellectual disability in infancy.

phenylketonuria

/ ˌfiːnaɪlˌkiːtəˈnjʊərɪə /

noun

1. a congenital metabolic disorder characterized by the abnormal accumulation of phenylalanine in the body fluids, resulting in various degrees of mental deficiency

phenylketonuria

/ fĕn′əl-kēt′n-r′ē-ə,fē′nəl- /

1. A genetic disorder in which the body lacks an enzyme necessary to metabolize phenylalanine to tyrosine. If untreated, the disorder can cause brain damage and progressive mental retardation as a result of the accumulation of phenylalanine and its breakdown products.

phenylketonuria

1. A hereditary disease that prevents the proper metabolism of phenylalanine, an amino acid . When phenylalanine is not metabolized properly, poisonous substances can build up in the body, causing brain damage and mental retardation. The effects of PKU can be controlled by a special diet.

Notes

States commonly require newborns to be tested for PKU.

Other Words From

• phen·yl·ke·to·nu·ric adjective

Word History and Origins

Origin of phenylketonuria¹

First recorded in 1930–35; from New Latin; phenyl, ketone, -uria

Word History and Origins

Origin of phenylketonuria¹

C20: New Latin; see phenyl , ketone , -uria

Example Sentences

Blood obtained by pricking a baby’s heel was collected on filter paper and tested for phenylketonuria, a rare metabolic condition that, if untreated, causes intellectual disability.

From Scientific American

However, for individuals with a rare genetic disorder called phenylketonuria, phenylalanine can accumulate and cause health issues, so they are sometimes instructed to avoid it.

From Salon

These are people with an inherited disease called phenylketonuria or PKU, who are born unable to metabolise the phenylalanine that is released as aspartame is broken down.

From BBC

At Children’s Hospital, Richard Koch devoted most of his career to developmental disabilities, especially the early detection and prevention of phenylketonuria, commonly called PKU.

From Los Angeles Times

But that approach is not unprecedented: People born with the metabolic disorder phenylketonuria, for whom the amino acid phenylalanine is a neurotoxin, stay healthy by getting amino acids from a phenylalanine-free drink.

From Science Magazine