A novel POC1A variant in an alternatively spliced exon causes classic SOFT syndrome: clinical presentation of seven patients.
J Hum Genet
; 65(2): 193-197, 2020 Jan.
Article
em En
| MEDLINE
| ID: mdl-31767933
ABSTRACT
Biallelic pathogenic variants in POC1A are ultra rare. They have been reported in 13 families as causing either Short stature, Onychodysplasia, Facial dysmorphism, and hypoTrichosis (SOFT) syndrome, or a milder partially overlapping phenotype, variant POC1A-related syndrome. This pleiotropic effect is likely precipitated by the variant's location and respective affected protein domain. Here, we describe seven patients from two consanguineous Omani families with classic SOFT syndrome and a novel homozygous POC1A variant (c.64G>T; p.(Val22Phe)), which is the first one described for the alternative exon 2. This result refines the POC1A mutational spectrum relevant for exertion of the described pleiotropic effect. Furthermore, six of our patients experienced recurrent mild to severe respiratory difficulties that have not been previously reported for SOFT syndrome and may be an underdiagnosed or a genotype-specific complication that warrants attention in future studies. Thus, our study unravels new aspects of the genotype-phenotype correlation suggested by previous reports.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Anormalidades Múltiplas
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Atrofia Muscular
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Proteínas de Ciclo Celular
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Anormalidades Craniofaciais
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Proteínas do Citoesqueleto
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Nanismo
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Estudos de Associação Genética
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Hipotricose
Tipo de estudo:
Etiology_studies
Limite:
Child
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Child, preschool
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Female
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Humans
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Male
Idioma:
En
Revista:
J Hum Genet
Assunto da revista:
GENETICA MEDICA
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Omã