17 March 2003
Validation of PAH genotype-based predictions of metabolic phenylalanine hydroxylase deficiency phenotype: investigation of PKU/MHP patients from Lithuania.
Jüratė Kasnauskienė, Loreta Cimbalistienė, Vaidutis KučinskasMed Sci Monit 2003; 9(3): CR142-146 :: ID: 4726
Abstract
BACKGROUND: Phenylalanine hydroxylase (PheOH) deficiency is inherited as an autosomal recessive trait. The associated hyperphenylalaninemia phenotype is highly variable, primarily due to great allelic heterogeneity in the PAH locus. The goal of our study was to assess the relationship between individual PAH locus mutations and biochemical and metabolic phenotypes in phenylketonuria (PKU) and mild hyperphenylalaninemia (MHP) patients. MATERIAL/METHODS: In this study, a total of 184 independent PAH chromosomes (92 unrelated patients with PKU and MHP residing in Lithuania) were investigated. All 13 exons of the PAH gene of all PKU probands tested were scanned for DNA sequence alterations by denaturing gradient gel electrophoresis (DGGE); mutations were identified by direct fluorescent automated sequencing or by restriction enzyme digestion analysis of the relevant exons. PAH genotype-based prediction of metabolic PhOH deficiency phenotype in PKU/MHP patients form Lithuania was estimated by the assigned value (AV) and functional hemizygosity methods. RESULTS: Our data provide evidence that a simple genotype-phenotype correlation does exist in most patients with PheOH deficiency: we observed a perfect match between the expected and observed phenotypes in 96% of the cases investigated. CONCLUSIONS: The results obtained confirm that methods of functional hemizygosity and AV sum are applicable for the estimation of the genotype-phenotype correlation in the investigated group of PKU/MHP patients.
Keywords: Phenylalanine - blood, Phenylalanine Hydroxylase - genetics, Phenylketonurias - blood, Phenylketonurias - enzymology, Phenylketonurias - genetics
Editorial
01 March 2024 : Editorial
Editorial: First Regulatory Approvals for CRISPR-Cas9 Therapeutic Gene Editing for Sickle Cell Disease and Transfusion-Dependent β-ThalassemiaDOI: 10.12659/MSM.944204
Med Sci Monit 2024; 30:e944204
In Press
18 Mar 2024 : Clinical Research
Sexual Dysfunction in Women After Tibial Fracture: A Retrospective Comparative StudyMed Sci Monit In Press; DOI: 10.12659/MSM.944136
21 Feb 2024 : Clinical Research
Potential Value of HSP90α in Prognosis of Triple-Negative Breast CancerMed Sci Monit In Press; DOI: 10.12659/MSM.943049
22 Feb 2024 : Review article
Differentiation of Native Vertebral Osteomyelitis: A Comprehensive Review of Imaging Techniques and Future ...Med Sci Monit In Press; DOI: 10.12659/MSM.943168
23 Feb 2024 : Clinical Research
A Study of 60 Patients with Low Back Pain to Compare Outcomes Following Magnetotherapy, Ultrasound, Laser, ...Med Sci Monit In Press; DOI: 10.12659/MSM.943732
Most Viewed Current Articles
16 May 2023 : Clinical Research
Electrophysiological Testing for an Auditory Processing Disorder and Reading Performance in 54 School Stude...DOI :10.12659/MSM.940387
Med Sci Monit 2023; 29:e940387
17 Jan 2024 : Review article
Vaccination Guidelines for Pregnant Women: Addressing COVID-19 and the Omicron VariantDOI :10.12659/MSM.942799
Med Sci Monit 2024; 30:e942799
14 Dec 2022 : Clinical Research
Prevalence and Variability of Allergen-Specific Immunoglobulin E in Patients with Elevated Tryptase LevelsDOI :10.12659/MSM.937990
Med Sci Monit 2022; 28:e937990
01 Jan 2022 : Editorial
Editorial: Current Status of Oral Antiviral Drug Treatments for SARS-CoV-2 Infection in Non-Hospitalized Pa...DOI :10.12659/MSM.935952
Med Sci Monit 2022; 28:e935952