Mutational and phenotypical spectrum of phenylalanine hydroxylase deficiency in Denmark.

Abstract:

:We describe the genotypes of the complete cohort, from 1967 to 2014, of phenylketonuria (PKU) patients in Denmark, in total 376 patients. A total of 752 independent alleles were investigated. Mutations were identified on 744 PKU alleles (98.9%). In total, 82 different mutations were present in the cohort. The most frequent mutation c.1315+1G>A (IVS12+1G>A) was found on 25.80% of the 744 alleles. Other very frequent mutations were c.1222C>T (p.R408W) (16.93%) and c.1241A>G (p.Y414C) (11.15%). Among the identified mutations, five mutations; c.532G>A (p.E178K), c.730C>T (p.P244S), c.925G>A (p.A309T), c.1228T>A (p.F410I), and c.1199+4A>G (IVS11+4A>G) have not been reported previously. The metabolic phenotypes of PKU are classified into four categories; 'classical PKU', 'moderate PKU', 'mild PKU' and 'mild hyperphenylalaninemia'. In this study, we assigned the phenotypic outcome of three of the five novel mutations and furthermore six not previously classified mutations to one of the four PKU categories.

journal_name

Clin Genet

journal_title

Clinical genetics

authors

Bayat A,Yasmeen S,Lund A,Nielsen JB,Møller LB

doi

10.1111/cge.12692

subject

Has Abstract

pub_date

2016-09-01 00:00:00

pages

247-51

issue

3

eissn

0009-9163

issn

1399-0004

journal_volume

90

pub_type

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