scholarly journals Hyperphenylalaninaemias in Estonia: Genotype–Phenotype Correlation and Comparative Overview of the Patient Cohort Before and After Nation-Wide Neonatal Screening

2017 ◽  
pp. 39-45 ◽  
Author(s):  
Hardo Lilleväli ◽  
Karit Reinson ◽  
Kai Muru ◽  
Kristi Simenson ◽  
Ülle Murumets ◽  
...  
Keyword(s):  
Neonatal Screening ◽  
Phenotype Correlation ◽  
Patient Cohort ◽  
Genotype Phenotype Correlation ◽  
Before And After

scholarly journals Neonatal Screening and Genotype-Phenotype Correlation of 21-Hydroxylase Deficiency in the Chinese Population

2021 ◽  
Vol 11 ◽  
Author(s):  
Xin Wang ◽  
Yanyun Wang ◽  
Dingyuan Ma ◽  
Zhilei Zhang ◽  
Yahong Li ◽  
...  
Keyword(s):  
Neonatal Screening ◽  
Chinese Population ◽  
Eastern China ◽  
Laboratory Data ◽  
Adrenal Crisis ◽  
Molecular Characteristics ◽  
Phenotype Correlation ◽  
Hydroxylase Deficiency ◽  
Genotype Phenotype Correlation ◽  
21 Hydroxylase Deficiency

Background: Congenital adrenal hyperplasia (CAH) is a group of autosomal recessive disorders encompassing enzyme deficiencies in the adrenal steroidogenesis pathway that leads to impaired cortisol biosynthesis. 21-hydroxylase deficiency (21-OHD) is the most common type of CAH. Severe cases of 21-OHD may result in death during the neonatal or infancy periods or sterility in later life. The early detection and timely treatment of 21-OHD are essential. This study aimed to summarize the clinical and genotype characteristics of 21-OHD patients detected by neonatal screening in Nanjing, Jiangsu province of China from 2000 to 2019.Methods: Through a retrospective analysis of medical records, the clinical presentations, laboratory data, and molecular characteristics of 21-OHD patients detected by neonatal screening were evaluated.Results: Of the 1,211,322 newborns who were screened, 62 cases were diagnosed with 21-OHD with an incidence of 1:19858. 58 patients were identified with the classical salt-wasting type (SW) 21-OHD and four patients were identified with simple virilizing type (SV) 21-OHD. Amongst these patients, 19 cases patients accepted genetic analysis, and another 40 cases were received from other cities in Eastern China. Eighteen different variants were found in the CYP21A2 gene. The most frequent variants was c.293-13A/C>G (36.29%). The most severe clinical manifestations were caused by large deletions or conversions of CYP21A2.Conclusions: This study suggested that neonatal screening effectively leads to the early diagnosis of 21-OHD and reduces fatal adrenal crisis. Our data provide additional information on the occurrence and genotype-phenotype correlation of 21-OHD in the Chinese population which can be used to better inform treatment and improve prognosis.

A familial case of osteogenesis imperfecta: study of genotype-phenotype correlation

2013 ◽  
Author(s):  
Ponti Emanuela ◽  
Mihalich Alessandra ◽  
Broggi Francesca ◽  
Maria Di Blasio Anna ◽  
Luisa Bianchi Maria
Keyword(s):  
Osteogenesis Imperfecta ◽  
Familial Case ◽  
Phenotype Correlation ◽  
Genotype Phenotype Correlation

scholarly journals Genotype‐phenotype correlation identified a novel SARS‐CoV‐2 variant possibly linked to severe disease

2021 ◽  
Author(s):  
Tom Loney ◽  
Hamda Khansaheb ◽  
Sathishkumar Ramaswamy ◽  
Divinlal Harilal ◽  
Zulfa Omar Deesi ◽  
...  
Keyword(s):  
Severe Disease ◽  
Phenotype Correlation ◽  
Genotype Phenotype Correlation

scholarly journals Neonatal screening and genotype-phenotype correlation of hyperphenylalaninemia in the Chinese population

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Xin Wang ◽  
Yanyun Wang ◽  
Dingyuan Ma ◽  
Zhilei Zhang ◽  
Yahong Li ◽  
...  
Keyword(s):  
Neonatal Screening ◽  
Phenylalanine Hydroxylase ◽  
Laboratory Data ◽  
Molecular Characteristics ◽  
Phenotype Correlation ◽  
Common Amino Acid ◽  
Appropriate Treatment ◽  
Clinical Presentations ◽  
Average Current

Abstract Background Hyperphenylalaninemia (HPA) is the most common amino acid metabolic disease involving phenylalanine hydroxylase (PAH, OMIM*612,349) deficiency or coenzyme tetrahydrobiopterin (BH4) deficiency. Patients with severe HPA often have a difficult life. Early diagnosis of HPA before the development of symptoms is possible via neonatal screening, facilitating appropriate treatment and reducing mortality and disability rates. This study revealed the prevalence, mutational and phenotypic spectrum, and prognosis of HPA by neonatal screening from January 2001 to September 2020 in Nanjing, Jiangsu Province, China. Methods Through a retrospective analysis of the information available in the neonatal screening database, the clinical presentations, laboratory data, molecular characteristics and treatment follow-up data of HPA patients detected by neonatal screening were evaluated. Results We diagnosed 181 patients with HPA from 1 to 957 newborns, giving an incidence of 1:6873. Among these patients, 177 were identified as PAH deficient and four patients were BH4 deficient. The average current age of the patients was 6.38 years old. The most common mutations of PAH were c.728 C > A/ p.Arg243Gln (13.83 %), c.158G > A/ p.Arg53His (9.57 %), c.611 A > G/ p.Tyr204Cys (7.44 %), and c.721 C > T/ p.Arg241Cys (6.38 %). Conclusions This study revealed the prevalence, phenotype-genotype, and prognosis of HPA in China and contributes to the updating of PAHD data for China and worldwide. Our study not only expanded the spectrum of phenotypes and genotype but also provided a valuable tool for improved genetic counseling and management of future cases.

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