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Similar Rates of Deleterious Copy Number Variants in Early-Onset Psychosis and Autism Spectrum Disorder
Catherine A Brownstein1, Elise Douard1, Josephine Mollon1
1Early Psychosis Investigation Center (Brownstein, Mollon, Smith, Hojlo, Knowles, Deaso, D'Angelo, Deo, Glahn, Gonzalez-Heydrich), Division of Genetics and Genomics (Brownstein, Smith, Cabral, Li, Bowen, Rao, Genetti, Agrawal, Beggs, Glahn), Manton Center for Orphan Disease Research (Brownstein, Smith, Cabral, Li, Bowen, Genetti, Agrawal, Beggs, Glahn), Department of Psychiatry and Behavioral Sciences (Mollon, Hojlo, Das, Goldman, Garvey, Carroll, Knowles, Deaso, D'Angelo, Deo, Glahn, Gonzalez-Heydrich), Tommy Fuss Center for Neuropsychiatric Disease Research (Deo, Glahn, Gonzalez-Heydrich), and Division of Newborn Medicine (Agrawal), Boston Children's Hospital, Boston; Department of Pediatrics (Brownstein, Smith, Genetti, Agrawal, Beggs, Deo) and Department of Psychiatry (Mollon, Carroll, Knowles, D'Angelo, Deo, Glahn, Gonzalez-Heydrich), Harvard Medical School, Boston; Department of Pediatrics (Jacquemont) and Department of Neuroscience (Douard, Moreau), Université de Montréal, Montreal; Sainte-Justine Hospital Research Center, Montreal (Douard, Saci, Moreau, Huguet, Jacquemont); Department of Biomedical and Health Informatics (Almasy) and Department of Psychiatry (Alexander-Bloch), Children's Hospital of Philadelphia, Philadelphia; Department of Psychiatry, Rutgers-Robert Wood Johnson Medical School, Piscataway, N.J. (Deo); Rutgers University Behavioral Health Care, Piscataway, N.J. (Deo). Lifespan Brain Institute, Children's Hospital of Philadelphia, Philadelphia (Almasy); Department of Genetics, University of Pennsylvania, Philadelphia (Almasy); Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago (Smith).
Children with early-onset psychosis (EOP) have a higher prevalence of copy number variants (CNVs) than those with autism spectrum disorder (ASD) or controls. Genetic screening is recommended for all children with psychotic diagnoses.
Area of Science:
- Genetics
- Neurodevelopmental Disorders
- Psychiatry
Background:
- Copy number variants (CNVs) are linked to neurodevelopmental and psychotic disorders.
- Early-onset psychosis (EOP) may have a stronger genetic influence than adult-onset disorders.
- The role of CNVs in EOP requires further investigation.
Purpose of the Study:
- To determine the prevalence and functional impact of CNVs in early-onset psychosis (EOP).
- To compare CNV prevalence and risk scores in EOP, autism spectrum disorder (ASD), and control groups.
- To assess the utility of genetic screening in EOP.
Main Methods:
- Documented prevalence of recurrent CNVs and functional impact of deletions/duplications genome-wide.
- Compared 137 children/adolescents with EOP to 5,540 with ASD and 16,504 controls.
- Calculated and compared CNV risk scores (CRSs) between groups.
Main Results:
- Recurrent CNVs were significantly more prevalent in EOP than in ASD or controls.
- CNV risk scores (CRSs) were higher in EOP compared to controls for deletions and duplications.
- EOP and ASD groups showed comparable CRSs, especially when co-occurring ASD was excluded.
Conclusions:
- High frequency of CNVs in EOP suggests a significant genetic component.
- Comparable CRSs in EOP and ASD support genetic overlap.
- Genetic screening for CNVs is recommended for all children with psychotic diagnoses.
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