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Mol Psychiatry. 2021 Nov 19; doi: 10.1038/s41380-021-01383-9. Epub 2021 Nov 19.

The benefit of diagnostic whole genome sequencing in schizophrenia and other psychotic disorders.

Molecular psychiatry

Anna Alkelai, Lior Greenbaum, Anna R Docherty, Andrey A Shabalin, Gundula Povysil, Ayan Malakar, Daniel Hughes, Shannon L Delaney, Emma P Peabody, James McNamara, Sahar Gelfman, Evan H Baugh, Anthony W Zoghbi, Matthew B Harms, Hann-Shyan Hwang, Anat Grossman-Jonish, Vimla Aggarwal, Erin L Heinzen, Vaidehi Jobanputra, Ann E Pulver, Bernard Lerer, David B Goldstein

Affiliations

  1. Institute for Genomic Medicine, Columbia University Medical Center, New York, NY, USA. [email protected].
  2. The Danek Gertner Institute of Human Genetics, Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel.
  3. The Joseph Sagol Neuroscience Center, Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel.
  4. Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
  5. Department of Psychiatry, University of Utah School of Medicine, Salt Lake City, UT, USA.
  6. Institute for Genomic Medicine, Columbia University Medical Center, New York, NY, USA.
  7. New York State Psychiatric Institute, Columbia University, New York City, NY, USA.
  8. Psychology Research Laboratory, McLean Hospital, Harvard Medical School, Belmont, MA, USA.
  9. New York State Psychiatric Institute, Office of Mental Health, New York, NY, USA.
  10. Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, TX, USA.
  11. Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
  12. Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA.
  13. Center for Motor Neuron Biology and Disease, Columbia University Irving Medical Center, New York, NY, USA.
  14. Department of Medicine, National Taiwan University School of Medicine, Taipei, Taiwan.
  15. Department of Pathology and Cell Biology, Columbia University, New York, NY, USA.
  16. Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
  17. New York Genome Center, New York, NY, USA.
  18. Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
  19. Biological Psychiatry Laboratory, Department of Psychiatry, Hadassah-Hebrew University Medical Center, Jerusalem, Israel.

PMID: 34799694 DOI: 10.1038/s41380-021-01383-9

Abstract

Schizophrenia has a multifactorial etiology, involving a polygenic architecture. The potential benefit of whole genome sequencing (WGS) in schizophrenia and other psychotic disorders is not well studied. We investigated the yield of clinical WGS analysis in 251 families with a proband diagnosed with schizophrenia (N = 190), schizoaffective disorder (N = 49), or other conditions involving psychosis (N = 48). Participants were recruited in Israel and USA, mainly of Jewish, Arab, and other European ancestries. Trio (parents and proband) WGS was performed for 228 families (90.8%); in the other families, WGS included parents and at least two affected siblings. In the secondary analyses, we evaluated the contribution of rare variant enrichment in particular gene sets, and calculated polygenic risk score (PRS) for schizophrenia. For the primary outcome, diagnostic rate was 6.4%; we found clinically significant, single nucleotide variants (SNVs) or small insertions or deletions (indels) in 14 probands (5.6%), and copy number variants (CNVs) in 2 (0.8%). Significant enrichment of rare loss-of-function variants was observed in a gene set of top schizophrenia candidate genes in affected individuals, compared with population controls (N = 6,840). The PRS for schizophrenia was significantly increased in the affected individuals group, compared to their unaffected relatives. Last, we were also able to provide pharmacogenomics information based on CYP2D6 genotype data for most participants, and determine their antipsychotic metabolizer status. In conclusion, our findings suggest that WGS may have a role in the setting of both research and genetic counseling for individuals with schizophrenia and other psychotic disorders and their families.

© 2021. The Author(s), under exclusive licence to Springer Nature Limited.

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