ArticleSchizophrenia bulletin2023
Increased Prevalence of Rare Copy Number Variants in Treatment-Resistant Psychosis.
Article in Schizophrenia bulletin, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 27 citations in OpenAlex.
- The association of schizophrenia polygenic scores with continuously-hospitalized, treatment-resistant schizophrenia.Molecular psychiatry · 2026Article
- Review
- Antipsychotic Use Among Intellectually Disabled Individuals With Rare Genetic Variants That Confer Risk for Schizophrenia.Journal of intellectual disability research : JIDR · 2026Article
- Why Is Clozapine Uniquely Effective in Treatment-Resistant Schizophrenia? A Review and Proposal.Biological psychiatry · 2026Review
- Genetic Variants from Large Cohorts and Familial Studies Implicate Common Mechanisms in Schizophrenia.Biology · 2026Review
- A scoping review of genetic studies of treatment-resistant schizophrenia.Frontiers in genetics · 2026Review
- Transcriptomic and genetic analysis suggests a role for mitochondrial dysregulation in schizophrenia.medRxiv : the preprint server for health sciences · 2025Article
- Obstacles, Opportunities, and Ethical Considerations for Genomic Investigations of Individuals Continuously Hospitalized with Treatment-resistant Schizophrenia.Schizophrenia bulletin open · 2025Article
- Treatment-resistant schizophrenia with 22q11.2 deletion and additional genetic defects.Neuropsychopharmacology reports · 2024Article
- Behavioral and Psychiatric Disorders in Syndromic Autism.Brain sciences · 2024Review
- Genomic findings in schizophrenia and their implications.Molecular psychiatry · 2023Review
- Rare Copy Number Variation in Schizophrenia and Implications for Treatment.Schizophrenia bulletin · 2023Article
- X chromosome aneuploidies and schizophrenia: association analysis and phenotypic characterization.Psychiatry and clinical neurosciences · 2022Article
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20 authors at 4 institutions in 3 countries.
Funding
Abstract
backgroundIt remains unknown why ~30% of patients with psychotic disorders fail to respond to treatment. Previous genomic investigations of treatment-resistant psychosis have been inconclusive, but some evidence suggests a possible link between rare disease-associated copy number variants (CNVs) and worse clinical outcomes in schizophrenia. Here, we identified schizophrenia-associated CNVs in patients with treatment-resistant psychotic symptoms and then compared the prevalence of these CNVs to previously published schizophrenia cases not selected for treatment resistance.
methodsCNVs were identified using chromosomal microarray (CMA) and whole exome sequencing (WES) in 509 patients with treatment-resistant psychosis (a lack of clinical response to ≥3 adequate antipsychotic medication trials over at least 5 years of psychiatric hospitalization). Prevalence of schizophrenia-associated CNVs in this sample was compared to that in a previously published large schizophrenia cohort study.
resultsIntegrating CMA and WES data, we identified 47 cases (9.2%) with at least one CNV of known or possible neuropsychiatric risk. 4.7% (n = 24) carried a known neurodevelopmental risk CNV. The prevalence of well-replicated schizophrenia-associated CNVs was 4.1%, with duplications of the 16p11.2 and 15q11.2-q13.1 regions, and deletions of the 22q11.2 chromosomal region as the most frequent CNVs. Pairwise loci-based analysis identified duplications of 15q11.2-q13.1 to be independently associated with treatment resistance.
conclusionsThese findings suggest that CNVs may uniquely impact clinical phenotypes beyond increasing risk for schizophrenia and may potentially serve as biological entry points for studying treatment resistance. Further investigation will be necessary to elucidate the spectrum of phenotypic characteristics observed in adult psychiatric patients with disease-associated CNVs.
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