Congenital Adrenal Hyperplasia Due to 21-Hydroxylase Deficiency: Genetic Characterization and the Genotype–Phenotype Correlation

2021 ◽  
pp. 19-33
Author(s):  
Duarte Pignatelli ◽  
Sofia S. Pereira
Keyword(s):  
Congenital Adrenal Hyperplasia ◽  
Genetic Characterization ◽  
Adrenal Hyperplasia ◽  
Phenotype Correlation ◽  
Hydroxylase Deficiency ◽  
Genotype Phenotype Correlation ◽  
21 Hydroxylase Deficiency

scholarly journals Genotype-Phenotype Correlation in Patients with Congenital Adrenal Hyperplasia due to 21-Hydroxylase Deficiency in Cuba

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Tania Mayvel Espinosa Reyes ◽  
Teresa Collazo Mesa ◽  
Paulina Arasely Lantigua Cruz ◽  
Adriana Agramonte Machado ◽  
Emma Domínguez Alonso ◽  
...  
Keyword(s):  
Congenital Adrenal Hyperplasia ◽  
Point Mutations ◽  
Clinical Manifestations ◽  
Adrenal Hyperplasia ◽  
Phenotype Correlation ◽  
Hydroxylase Deficiency ◽  
Cyp21a2 Gene ◽  
Genotype Phenotype Correlation ◽  
21 Hydroxylase Deficiency ◽  
Cuban Population

Background. There are several studies that show a good genotype-phenotype correlation in congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency (21OHD). However, there is well-documented evidence of inconsistency in some cases. Objectives. To determine if there is a correlation between the identified mutations and the clinical manifestations of 21OHD in the Cuban population. Methods. A cross-sectional descriptive study of all patients referred for a molecular diagnosis of 21OHD in Cuba from January 2000 to December 2018. The clinical manifestations of each patient were identified and classified according to the phenotype. The CYP21A2 gene was analyzed for the presence of 5 point mutations involved in the pathogenesis of 21OHD (intron 2, deletion of 8bp, I172N, P30L, and Q318X); correlation was sought between the phenotypic characteristics and the frequencies of point mutations in the patients using the Spearman test. Results. A total of 55 patients underwent direct analysis of the CYP21A2 gene in order to determine the presence of the 5 point mutations. Point mutations were identified in 31 patients, which corresponded to 56%. A statistically significant genotype-phenotype correlation was found. Conclusions. The correlation between the detected molecular defect and the clinical expression of 21OHD was reasonable in the Cuban population, which could allow phenotypic predictions to be made from the genotype.

scholarly journals Genotype-Phenotype Correlation in 153 Adult Patients With Congenital Adrenal Hyperplasia due to 21-Hydroxylase Deficiency: Analysis of the United Kingdom Congenital Adrenal Hyperplasia Adult Study Executive (CaHASE) Cohort

2013 ◽  
Vol 98 (2) ◽  
pp. E346-E354 ◽  
Author(s):  
Nils Krone ◽  
Ian T. Rose ◽  
Debbie S. Willis ◽  
James Hodson ◽  
Sarah H. Wild ◽  
...  
Keyword(s):  
United Kingdom ◽  
Health Status ◽  
Congenital Adrenal Hyperplasia ◽  
Adrenal Hyperplasia ◽  
Phenotype Correlation ◽  
Hydroxylase Deficiency ◽  
Adult Study ◽  
The United Kingdom ◽  
Genotype Phenotype Correlation ◽  
21 Hydroxylase Deficiency

Abstract Context: In congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency, a strong genotype-phenotype correlation exists in childhood. However, similar data in adults are lacking. Objective: The objective of the study was to test whether the severity of disease-causing CYP21A2 mutations influences the treatment and health status in adults with CAH. Research Design and Methods: We analyzed the genotype in correlation with treatment and health status in 153 adults with CAH from the United Kingdom Congenital adrenal Hyperplasia Adult Study Executive cohort. Results: CYP21A2 mutations were distributed similarly to previously reported case series. In 7 patients a mutation was identified on only 1 allele. Novel mutations were detected on 1.7% of alleles (5 of 306). Rare mutations were found on 2.3% of alleles (7 of 306). For further analysis, patients were categorized into CYP21A2 mutation groups according to predicted residual enzyme function: null (n = 34), A (n = 42), B (n = 36), C (n = 34), and D (n = 7). Daily glucocorticoid dose was highest in group null and lowest in group C. Fludrocortisone was used more frequently in patients with more severe genotypes. Except for lower female height in group B, no statistically significant associations between genotype and clinical parameters were found. Androgens, blood pressure, lipids, blood glucose, and homeostasis model assessment of insulin resistance were not different between groups. Subjective health status was similarly impaired across groups. Conclusions: In adults with classic CAH and women with nonclassic CAH, there was a weak association between genotype and treatment, but health outcomes were not associated with genotype. The underrepresentation of males with nonclassic CAH may reflect that milder genotypes result in a milder condition that is neither diagnosed nor followed up in adulthood. Overall, our results suggest that the impaired health status of adults with CAH coming to medical attention is acquired rather than genetically determined and therefore could potentially be improved through modification of treatment.

scholarly journals A Case of Salt-Wasting Congenital Adrenal Hyperplasia with Triple Homozygous Mutation: Review of Literature

2020 ◽  
Author(s):  
Maria Laura Iezzi ◽  
Gaia Varriale ◽  
Luca Zagaroli ◽  
Stefania Lasorella ◽  
Marco Greco ◽  
...  
Keyword(s):  
Congenital Adrenal Hyperplasia ◽  
Autosomal Recessive ◽  
Homozygous Mutation ◽  
Adrenal Hyperplasia ◽  
Phenotype Correlation ◽  
Hydroxylase Deficiency ◽  
Autosomal Recessive Disorders ◽  
Salt Wasting ◽  
21 Hydroxylase Deficiency ◽  
Recessive Disorders

AbstractCongenital adrenal hyperplasia (CAH) due to steroid 21-hydroxylase deficiency represents a group of autosomal recessive disorders characterized by impaired cortisol production due to altered upstream steroid conversions, subclassified as classic and nonclassic forms. The genotype–phenotype correlation is possible in the most frequent case but not in all. Despite in literature many mutations are known, there is the possibility of finding a new genetic pattern in patients with CAH.

scholarly journals Hiperplasia Congénita da Suprarrenal por Deficiência de 21-Hidroxílase: Correlação Genótipo-Fenótipo

2015 ◽  
Vol 28 (1) ◽  
pp. 56 ◽  
Author(s):  
Catarina Mendes ◽  
Inês Vaz Matos ◽  
Luís Ribeiro ◽  
Maria João Oliveira ◽  
Helena Cardoso ◽  
...  
Keyword(s):  
Molecular Analysis ◽  
Genetic Defects ◽  
Adrenal Hyperplasia ◽  
Phenotype Correlation ◽  
Hydroxylase Deficiency ◽  
Salt Wasting ◽  
Genotype Phenotype Correlation ◽  
Age Of Diagnosis ◽  
Simple Virilizing ◽  
21 Hydroxylase Deficiency

<strong>Introduction:</strong> Congenital adrenal hyperplasia due to 21-hydroxylase deficiency is one of the most frequent inborn conditions. It is caused by distinct mutations in the CYP21A2 gene and in the majority of cases the disease’s severity correlates with CYP21A2 allelic variation Our aim was to describe the mutational spectrum of CYP21A2 and evaluate genotype-phenotype correlation in a cohort of portuguese patients with 21-hydroxylase deficiency.<br /><strong>Material and Methods</strong>: Retrospective study of 22 patients with clinical diagnosis of 21-hydroxylase deficiency. Molecular analysis of CYP21A2 was performed and genotype-phenotype correlation was then established.<br /><strong>Results</strong>: Genotyping was performed in 22 unrelated patients: 5 with classic salt-wasting (average age of diagnosis 10,2 days; minimum 1, maximum 20 days), 7 with classic simple virilizing (average age of diagnosis 3,5 years; minimum 0 days, maximum 7 years) and 10 with nonclassical form (average age of diagnosis 5,7 years; minimum 4 years, maximum 8 years). The most frequent genetic defects in the classic forms were I2 splice (24%) and I172N (24%), followed by Q318X (16%) and gene deletions (16%) and in the nonclassical form, the V281L (80%). The overall concordance between genotype and phenotype was 81,8%. Genotype accurately predicted phenotype in 83,3%, 100% and 90% of patients with classic salt-wasting, classic simple virilizing and nonclassical mutations, respectively.<br /><strong>Discussion</strong>: The frequency of genetic defects in our patients was comparable to similar studies. In most cases there was a good correlation between genotype and phenotype.<br /><strong>Conclusions</strong>: Molecular analysis of CYP21A2 provides useful information in terms of prediction of disease severity, genetic and prenatal counseling.<br /><strong>Keywords</strong>: Adrenal Hyperplasia, Congenital; Genotype; Phenotype; Steroid 21-Hydroxylase.

Sign in / Sign up

Export Citation Format

Share Document