Abstract:
BACKGROUND:In phenylketonuria, genetic heterogeneity, frequent compound heterozygosity, and the lack of functional data for phenylalanine hydroxylase genotypes hamper reliable phenotype prediction and individualised treatment. METHODS:A literature search revealed 690 different phenylalanine hydroxylase genotypes in 3066 phenylketonuria patients from Europe and the Middle East. We determined phenylalanine hydroxylase function of 30 frequent homozygous and compound heterozygous genotypes covering 55% of the study population, generated activity landscapes, and assessed the phenylalanine hydroxylase working range in the metabolic (phenylalanine) and therapeutic (tetrahydrobiopterin) space. RESULTS:Shared patterns in genotype-specific functional landscapes were linked to biochemical and pharmacological phenotypes, where (1) residual activity below 3.5% was associated with classical phenylketonuria unresponsive to pharmacological treatment; (2) lack of defined peak activity induced loss of response to tetrahydrobiopterin; (3) a higher cofactor need was linked to inconsistent clinical phenotypes and low rates of tetrahydrobiopterin response; and (4) residual activity above 5%, a defined peak of activity, and a normal cofactor need were associated with pharmacologically treatable mild phenotypes. In addition, we provide a web application for retrieving country-specific information on genotypes and genotype-specific phenylalanine hydroxylase function that warrants continuous extension, updates, and research on demand. CONCLUSIONS:The combination of genotype-specific functional analyses with biochemical, clinical, and therapeutic data of individual patients may serve as a powerful tool to enable phenotype prediction and to establish personalised medicine strategies for dietary regimens and pharmacological treatment in phenylketonuria.
journal_name
J Med Genetjournal_title
Journal of medical geneticsauthors
Danecka MK,Woidy M,Zschocke J,Feillet F,Muntau AC,Gersting SWdoi
10.1136/jmedgenet-2014-102621subject
Has Abstractpub_date
2015-03-01 00:00:00pages
175-85issue
3eissn
0022-2593issn
1468-6244pii
jmedgenet-2014-102621journal_volume
52pub_type
杂志文章abstract:BACKGROUND:Acrocallosal syndrome (ACLS) is a rare recessive disorder characterised by corpus callosum agenesis or hypoplasia, craniofacial dysmorphism, duplication of the hallux, postaxial polydactyly, and severe mental retardation. Recently, we identified mutations in KIF7, a key component of the Sonic hedgehog pathwa...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmedgenet-2012-101016
更新日期:2012-11-01 00:00:00
abstract::We report a new disorder that we have called genochondromatosis. Four patients from the same family with the characteristic localisation of chondromatosis (clavicle, upper end of humerus, and lower end of femur) were investigated. The favourable course, the dominant transmission, and previous publication of similar ca...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.28.7.485
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abstract::Germline mutations of the LKB1 (STK11) serine/threonine kinase gene (chromosome 19p13.3) cause Peutz-Jeghers syndrome, which is characterised by hamartomas of the gastrointestinal tract and typical pigmentation. Peutz-Jeghers syndrome carries an overall risk of cancer that may be up to 20 times that of the general pop...
journal_title:Journal of medical genetics
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abstract::The accidental discovery, in an inguinal hernia, of a male gonad in a 67-year-old woman is reported. The association of an unambiguous female phenotype with a purely male karyotype and a male gonad suggests the diagnosis of testicular feminisation. The differential diagnosis, particularly of testicular feminisation wi...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.15.3.229
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abstract::A female with the Weaver syndrome is reported. In addition to the characteristic manifestations of overgrowth and advanced bone age, the facies were typical, with a broad forehead, hypertelorism, a long philtrum, micrognathia, and large ears. Like most other patients with Weaver syndrome, she was developmentally delay...
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journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:
更新日期:1999-02-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
doi:10.1136/jmg.16.3.219
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journal_title:Journal of medical genetics
pub_type: 杂志文章
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更新日期:1995-03-01 00:00:00
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journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.33.7.603
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pub_type: 杂志文章
doi:10.1136/jmg.14.5.339
更新日期:1977-10-01 00:00:00
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doi:10.1136/jmedgenet-2016-104199
更新日期:2017-08-01 00:00:00
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journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.22.2.85
更新日期:1985-04-01 00:00:00
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doi:10.1136/jmedgenet-2016-103909
更新日期:2016-12-01 00:00:00
abstract::Sex linked recessive deafness is a rare cause of male genetic deafness, estimated to account for 6.2% of male genetic deafness in 1966. A male excess was found in the deaf population of Ireland in 1851. Reevaluation of this survey of 1851 confirms sex linked deafness as a factor in the disproportionate number of deaf ...
journal_title:Journal of medical genetics
pub_type: 杂志文章
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abstract::In an attempt to relate the age at onset of Huntington's disease to parental factors, the effects of parental onset-age (Po) and the age of the transmitting parent at the birth of a subsequently affected child (Pc) have been examined in a sample of cases ascertained from Victorian kindreds. There was a significant pos...
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pub_type: 杂志文章,评审
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journal_title:Journal of medical genetics
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journal_title:Journal of medical genetics
pub_type: 杂志文章,评审
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journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.32.4.293
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journal_title:Journal of medical genetics
pub_type: 杂志文章
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pub_type: 信件
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更新日期:2007-07-01 00:00:00
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journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.38.7.430
更新日期:2001-07-01 00:00:00
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journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmedgenet-2018-105328
更新日期:2018-12-01 00:00:00