Further description of two individuals with de novo p.(Glu127Lys) missense variant in the ASCL1 gene.
Clin Genet
; 105(5): 555-560, 2024 05.
Article
em En
| MEDLINE
| ID: mdl-38287449
ABSTRACT
Achaete-Scute Family basic-helix-loop-helix (bHLH) Transcription Factor 1 (ASCL1) is a proneural transcription factor involved in neuron development in the central and peripheral nervous system. While initially suspected to contribute to congenital central hypoventilation syndrome-1 (CCHS) with or without Hirschsprung disease (HSCR) in three individuals, its implication was ruled out by the presence, in one of the individuals, of a Paired-like homeobox 2B (PHOX2B) heterozygous polyalanine expansion variant, known to cause CCHS. We report two additional unrelated individuals sharing the same sporadic ASCL1 p.(Glu127Lys) missense variant in the bHLH domain and a common phenotype with short-segment HSCR, signs of dysautonomia, and developmental delay. One has also mild CCHS without polyalanine expansion in PHOX2B, compatible with the diagnosis of Haddad syndrome. Furthermore, missense variants with homologous position in the same bHLH domain in other genes are known to cause human diseases. The description of additional individuals carrying the same variant and similar phenotype, as well as targeted functional studies, would be interesting to further evaluate the role of ASCL1 in neurocristopathies.
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Base de dados:
MEDLINE
Assunto principal:
Fatores de Transcrição
/
Proteínas de Homeodomínio
Limite:
Humans
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article