Cited by 17Sexual Differentiation and DisordersAdrenal Hormones and DisordersMetabolism and Genetic Disorders

Clinical and molecular profile of newborns with confirmed or suspicious congenital adrenal hyperplasia detected after a public screening program implementation

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Kopacek, Cristiane, Prado, Mayara J., da Silva, Claudia M.D., de Castro, Simone M., Beltrão, Luciana A., Vargas, Paula R., Grandi, Tarciana, Rossetti, Maria L.R. +1 more·2019·Jornal de Pediatria

Abstract

To describe the results obtained in a neonatal screening program after its implementation and to assess the clinical and molecular profiles of confirmed and suspicious congenital adrenal hyperplasia cases. A cross-sectional study was conducted. Newborns with suspected disease due to high 17-hydroxyprogesterone levels and adjusted for birth weight were selected. Classical congenital adrenal hyperplasia (salt-wasting and simple virilizing forms) was diagnosed by an increase in 17-hydroxyprogesterone levels as confirmed in the retest, clinical evaluation, and genotype determined by SNaPshot and multiplex ligation-dependent probe amplification. After 24 months, 15 classic congenital adrenal hyperplasia cases were diagnosed in a total of 217,965 newborns, with an estimated incidence of 1:14,531. From 132 patients, seven non-classical and 14 heterozygous patients were screened for CYP21A2 mutations, and 96 patients presented false positives with wild type CYP21A2. On retest, increased 17-hydroxyprogesterone levels were found in classical congenital adrenal hyperplasia patients and showed significant correlation with genotype-related classical genital adrenal hyperplasia. The most frequent mutations were IVS2-13A/C>G followed by gene deletion or rearrangement events in the classical form. In non-classical and heterozygous diseases, p.Val282Leu was the most common mutation. The results underscore the effectiveness of congenital adrenal hyperplasia neonatal screening in the public health system and indicate that the adopted strategy was appropriate. The second sample collection along with genotyping of suspected cases helped to properly diagnose both severe and milder cases and delineate them from false positive patients. Descrever os resultados obtidos em um programa de triagem neonatal após sua implantação e avaliar os perfis clínicos e moleculares de casos confirmados e suspeitos de hiperplasia adrenal congênita. Foi feito um estudo transversal. Recém-nascidos com suspeita da doença devido aos altos níveis de 17-alfa-hidroxiprogesterona e ajustados pelo peso ao nascer foram selecionados. A hiperplasia adrenal congênita clássica (forma perdedora de sal e forma virilizante simples) foi diagnosticada por um aumento nos níveis de 17-alfa-hidroxiprogesterona confirmado no reteste, avaliação clínica e genótipo determinado com o uso do ensaio SNaPshot e amplificação multiplex de sondas dependente de ligação. Após 24 meses, 15 casos clássicos de hiperplasia adrenal congênita foram diagnosticados em 217.965 recém-nascidos, com uma incidência estimada de 1: 14.531. De 132 pacientes, sete não-clássicos e 14 heterozigotos foram submetidos à triagem para mutações no gene CYP21A2 e 96 pacientes apresentaram resultados falso-positivos com CYP21A2 do tipo selvagem. No reteste, níveis aumentados de 17-alfa-hidroxiprogesterona foram encontrados em pacientes com hiperplasia adrenal congênita clássica e mostraram correlação significativa com HAC clássica relacionada ao genótipo. As mutações mais frequentes foram IVS2-13A/C>G, seguidas de deleção gênica ou eventos de rearranjo na forma clássica. Em casos doenças não clássicas e heterozigose, a mutação p.Val282Leu foi a mais comum. Os resultados ressaltam a eficácia da triagem neonatal para a hiperplasia adrenal congênita no sistema público de saúde e indicam que a estratégia adotada foi adequada. A segunda coleta de amostras, juntamente com a genotipagem dos casos suspeitos, ajudou a diagnosticar adequadamente os casos graves e mais leves e diferenciá-los de pacientes com resultado falso-positivo.

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  1. Prader A. Der Genitalbefund beim Pseudohermaphroditismus Femininus des kongenitalen Adrenogenitalen Syndromes. Helv Paediatr Acta. 1954;3:231---48.

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Authors
Kopacek, C., Prado, M. J., da Silva, C. M. D., de Castro, S. M., Beltrão, L. A., Vargas, P. R., Grandi, T., Rossetti, M. L. R., & Spritzer, P. M.
Affiliations
  • Universidade Federal do Rio Grande do Sul (BR)
  • Universidade Federal de Ciências da Saúde de Porto Alegre (BR)
  • Governo do Estado do Rio Grande do Sul (BR)
Corresponding author
Kopacek, Cristiane
Venue
Jornal de Pediatria
Publisher
Elsevier BV
Published
2019-05
Volume
95
Issue
3
Pages
282-290
ISSN
0021-7557 (ISSN-L)
OpenAlex
W2801151983
Cited by
17
References
33
Citations by year
2025: 2 · 2024: 1 · 2023: 3 · 2022: 1 · 2021: 2 · 2020: 3 · 2019: 4 · 2018: 1
FWCI
0.89
Type
journal article
Language
en
Open access
Locations
  • Jornal de Pediatria (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (publishedVersion, other-oa)
  • Americanae (AECID Library) (submittedVersion, cc-by-nc-nd)
  • Americanae (AECID Library) (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Redalyc (Universidad Autónoma del Estado de México) (submittedVersion)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, cc-by-nc-sa)
Funders
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (INCT 573747/2008–3, 573747/2008‐3, CNPq INCT 573747/2008‐3)
  • Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Sexual Differentiation and Disorders
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Metabolism and Genetic Disorders
Keywords
congenital adrenal hyperplasia, newborn screening, 17-hydroxyprogesterone, CYP21A2 mutations, salt-wasting form, non-classical congenital adrenal hyperplasia, heterozygous carriers, false positives, genotype-phenotype correlation, incidence
MeSH terms
Adrenal Hyperplasia, Congenital, Brazil, Cross-Sectional Studies, Female, Genotype, Humans, Infant, Newborn, Male, Mutation, Phenotype, Steroid 21-Hydroxylase, Biomarkers, Incidence, Neonatal Screening, 17-alpha-Hydroxyprogesterone

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