Phenotypic characterization of seven individuals with Marbach-Schaaf neurodevelopmental syndrome.
Am J Med Genet A
; 188(9): 2627-2636, 2022 09.
Article
em En
| MEDLINE
| ID: mdl-35789103
ABSTRACT
We present the phenotypes of seven previously unreported patients with Marbach-Schaaf neurodevelopmental syndrome, all carrying the same recurrent heterozygous missense variant c.1003C>T (p.Arg335Trp) in PRKAR1B. Clinical features of this cohort include global developmental delay and reduced sensitivity to pain, as well as behavioral anomalies. Only one of the seven patients reported here was formally diagnosed with autism spectrum disorder (ASD), while ASD-like features were described in others, overall indicating a lower prevalence of ASD in Marbach-Schaaf neurodevelopmental syndrome than previously assumed. The clinical spectrum of the current cohort is similar to that reported in the initial publication, delineating a complex developmental disorder with behavioral and neurologic features. PRKAR1B encodes the regulatory subunit R1ß of the protein kinase A complex (PKA), and is expressed in the adult and embryonal central nervous system in humans. PKA is crucial to a plethora of cellular signaling pathways, and its composition of different regulatory and catalytic subunits is cell-type specific. We discuss potential molecular disease mechanisms underlying the patients' phenotypes with respect to the different known functions of PKA in neurons, and the phenotypes of existing R1ß-deficient animal models.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Transtornos do Neurodesenvolvimento
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Transtorno do Espectro Autista
Tipo de estudo:
Etiology_studies
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Incidence_studies
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Observational_studies
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Prognostic_studies
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Risk_factors_studies
Limite:
Adult
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Animals
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Humans
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article