Molecular syndromology · 2023
Expanding Phenotype of SYT1-Related Neurodevelopmental Disorder: Case Report and Literature Review.
СтатьяНазвание и аннотация: Перевод в очереди
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Cesaroni Carlo Alberto, Spagnoli Carlotta, Baga Margherita, Rizzi Susanna, Frattini Daniele, Caraffi Stefano Giuseppe, Pollazzon Marzia, Garavelli Livia, Fusco Carlo
Аннотация
INTRODUCTION: Synaptotagmin 1 (SYT1), the predominant SYT isoform in the central nervous system, likely acts by promoting vesicle docking, deforming the plasma membrane via Ca2+-dependent membrane penetration.
CASE PRESENTATION: Here, we describe a 21-year-old woman harboring a novel variant in the SYT1 gene, who presents with a complex phenotype, featuring severe intellectual disability, absent speech, behavioral abnormalities, motor stereotypies, dystonic posturing of her hands, a hyperkinetic movement disorder in her childhood, infantile hypotonia, sialorrhea, mild dysmorphic features, epilepsy, peculiar EEG findings, and severe scoliosis.
DISCUSSION: Based on our case and literature review on the 22 previously described patients, we can confirm a complex neurodevelopmental disorder in which, unlike other synaptopathies, epilepsy is present in a subset of cases (including our patient: 5/23, 22%), although characteristic EEG changes are far more common (10/23, 43.5%). Our patient's age allows us to provide long-term follow-up data and thus better delineate the SYT1-related clinical phenotype.
CASE PRESENTATION: Here, we describe a 21-year-old woman harboring a novel variant in the SYT1 gene, who presents with a complex phenotype, featuring severe intellectual disability, absent speech, behavioral abnormalities, motor stereotypies, dystonic posturing of her hands, a hyperkinetic movement disorder in her childhood, infantile hypotonia, sialorrhea, mild dysmorphic features, epilepsy, peculiar EEG findings, and severe scoliosis.
DISCUSSION: Based on our case and literature review on the 22 previously described patients, we can confirm a complex neurodevelopmental disorder in which, unlike other synaptopathies, epilepsy is present in a subset of cases (including our patient: 5/23, 22%), although characteristic EEG changes are far more common (10/23, 43.5%). Our patient's age allows us to provide long-term follow-up data and thus better delineate the SYT1-related clinical phenotype.