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Dynamic Clamp Methods to Investigate Impaired Neuronal Excitability Associated with Autism
Published on: October 17, 2025
Brief report: autistic symptoms, developmental regression, mental retardation, epilepsy, and dyskinesias in CNS
Paolo Moretti1, Sarika U Peters, Daniela Del Gaudio
1Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA.
Insights
Central nervous system folate deficiency (CFD) in children can lead to significant developmental delays, neurological issues, and autism spectrum disorder features. Early identification of CFD is crucial for intervention.
Area of Science:
- Neurology
- Developmental Pediatrics
- Metabolic Disorders
Background:
- Central nervous system folate deficiency (CFD) is a rare condition affecting neurological development.
- Autistic features are not typically associated with CFD in existing literature.
Purpose of the Study:
- To investigate the prevalence of autistic features in children diagnosed with CFD.
- To explore the clinical presentation and neurological impact of CFD.
Main Methods:
- Retrospective case study of seven children with confirmed CFD.
- Clinical assessment including psychomotor development, cognitive function, and neurological examination.
- Autism diagnostic tools (ADOS, ADI-R) administered to eligible subjects.
Main Results:
- All seven children presented with psychomotor retardation, cognitive delay, and dyskinesia.
- Six children experienced seizures; four had neonatal neurological abnormalities.
- Five children met diagnostic criteria for autism spectrum disorder, exhibiting characteristic behaviors.
- No mutations were identified in key folate-related genes.
Conclusions:
- Autistic features are a significant and observable characteristic in children with CFD.
- CFD should be considered in the differential diagnosis for children presenting with developmental regression, neurological abnormalities, and autistic traits.
Abstract:
We studied seven children with CNS folate deficiency (CFD). All cases exhibited psychomotor retardation, regression, cognitive delay, and dyskinesia; six had seizures; four demonstrated neurological abnormalities in the neonatal period. Two subjects had profound neurological abnormalities that precluded formal behavioral testing. Five subjects received ADOS and ADI-R testing and met diagnostic criteria for autism or autism spectrum disorders. They exhibited difficulties with transitions, insistence on sameness, unusual sensory interests, and repetitive behaviors. Those with the best language skills largely used repetitive phrases. No mutations were found in folate transporter or folate enzyme genes. These findings demonstrate that autistic features are salient in CFD and suggest that a subset of children with developmental regression, mental retardation, seizures, dyskinesia, and autism may have CNS folate abnormalities.
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