Identification of a second genetic alteration in patients with SHOX deficiency individuals: a potential explanation for phenotype variability

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art_DANTAS_Identification_of_a_second_genetic_alteration_in_patients_2023.PDF (660.63 KB)
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0
Tipo de produção
article
Data de publicação
2023
DOI
Scopus
Web of Science
PubMed
Título da Revista
ISSN da Revista
Título do Volume
Editora
OXFORD UNIV PRESS
Autores
LERARIO, Antonio M.
ALVES, Cresio
CRISOSTOMO, Lindiane G.
Citação
EUROPEAN JOURNAL OF ENDOCRINOLOGY, v.189, n.3, p.387-395, 2023
Projetos de Pesquisa
Unidades Organizacionais
Fascículo
Resumo
Objective Our study aimed to assess the impact of genetic modifiers on the significant variation in phenotype that is observed in individuals with SHOX deficiency, which is the most prevalent monogenic cause of short stature.Design and methods We performed a genetic analysis in 98 individuals from 48 families with SHOX deficiency with a target panel designed to capture the entire SHOX genomic region and 114 other genes that modulate growth and/or SHOX action. We prioritized rare potentially deleterious variants.Results We did not identify potential deleterious variants in the promoter or intronic regions of the SHOX genomic locus. In contrast, we found eight heterozygous variants in 11 individuals from nine families in genes with a potential role as genetic modifiers. In addition to a previously described likely pathogenic (LP) variant in CYP26C1 observed in two families, we identified LP variants in PTHLH and ACAN, and variants of uncertain significance in NPR2, RUNX2, and TP53 in more affected individuals from families with SHOX deficiency. Families with a SHOX alteration restricted to the regulatory region had a higher prevalence of a second likely pathogenic variant (27%) than families with an alteration compromising the SHOX coding region (2.9%, P = .04).Conclusion In conclusion, variants in genes related to the growth plate have a potential role as genetic modifiers of the phenotype in individuals with SHOX deficiency. In individuals with SHOX alterations restricted to the regulatory region, a second alteration could be critical to determine the penetrance and expression of the phenotype.
Palavras-chave
SHOX deficiency, genetic modifiers, phenotype variability, short stature, genetic background
URI
https://observatorio.fm.usp.br/handle/OPI/57310
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Coleções
Artigos e Materiais de Revistas Científicas - FM/MCM
Artigos e Materiais de Revistas Científicas - HC/ICHC
Artigos e Materiais de Revistas Científicas - LIM/25
Artigos e Materiais de Revistas Científicas - LIM/42