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Evaluation of Branched-Chain Amino Acids in Children with Autism Spectrum Disorder and Epilepsy

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Abstract

Autism spectrum disorder (ASD) and epilepsy run hand-to-hand in their pathophysiology. Epilepsy is not an uncommon finding in patients with ASD. The aim of the present study was to identify the metabolic abnormalities of BCAAs (leucine, isoleucine, and valine) in children with ASD with and without seizures in comparison with neurotypical controls. Also, this study aimed to investigate the presence of epileptiform discharges on electroencephalography (EEG) in ASD patients and to describe the types and frequency of seizures observed. The study included 90 children aged 2–7 years, 30 of whom were diagnosed with both ASD and epilepsy. The other 30 children were diagnosed as ASD without epilepsy, and a comparable 30 normally developed children served as a control group. The groups were matched by age and gender. All patients were referred to the Autism Disorders Clinic for interviews and examinations. The Childhood Autism Rating Scale (CARS) was applied to all study participants to assess the degree of autism. The present study results show that all types of seizures may be identified in ASD children. The median serum levels of BCAAs were lower in ASD children with and without epilepsy than in neurotypical controls. This opens the door for discussion about new etiologies and better categorizations of ASD based on genotype and genetic abnormalities detected. More studies with larger samples are needed to understand ASD better and to more reliable evaluate the association between ASD, EEG changes, seizures, and BCAAs.

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Data Availability

The datasets generated during and analyzed during the current study are available from Prof. Nagwa A. Meguid (e-mail meguidna@yahoo.com) upon reasonable request.

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Acknowledgements

The authors would like to thank all study participants.

Funding

The National Research Centre funded the study.

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All authors confirmed they have contributed to the intellectual content of this paper and have met the following three requirements: (a) significant contributions to the conception and design, acquisition of data, or analysis and interpretation of data; (b) drafting or revising the article for intellectual content; and (c) final approval of the published article.

Corresponding author

Correspondence to Geir Bjørklund.

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Ethics Approval

The study was approved by the Medical Research Ethics Committee of the National Research Centre (No. 2011/10220), following the principles of the Declaration of Helsinki.

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Informed oral and written consent was obtained from all caregivers of the participants included in the present study.

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Consent to publish the data has been received from the caregivers of all patients.

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The authors declare no competing interests.

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Meguid, N.A., Hashem, H.S., Ghanem, M.H. et al. Evaluation of Branched-Chain Amino Acids in Children with Autism Spectrum Disorder and Epilepsy. Mol Neurobiol 60, 1997–2004 (2023). https://doi.org/10.1007/s12035-022-03202-w

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