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Related Experiment Video

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Author Spotlight: Exploring Sex-Specific Glial Signatures and Therapeutic Leads for Alzheimer's Disease
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Transcriptomic sex differences in postmortem brain samples from patients with psychiatric disorders.

Yan Xia1,2, Cuihua Xia3,4, Yi Jiang5

  • 1Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.

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|May 23, 2024
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Summary

Psychiatric disorders show sex differences. This study found females with schizophrenia, bipolar disorder, and autism spectrum disorder had greater transcriptomic dysfunction and connectivity issues in brain samples compared to males.

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Area of Science:

  • Neuroscience
  • Genetics
  • Psychiatry

Background:

  • Sex differences are observed in many psychiatric disorders, but the underlying biological mechanisms are not well understood.
  • Transcriptomic and connectivity alterations in the brain are implicated in psychiatric conditions.

Purpose of the Study:

  • To investigate sex-based differences in transcriptomic dysfunction in the prefrontal cortex of individuals with schizophrenia, bipolar disorder, and autism spectrum disorder.
  • To identify specific genes and pathways involved in these sex differences.

Main Methods:

  • Analysis of transcriptomics data from 2160 postmortem adult prefrontal cortex brain samples.
  • Sex-stratified comparative analysis of patient and control brain samples.
  • Identification of differentially expressed genes (DEGs) and gene coexpression modules.

Main Results:

  • Female patients with schizophrenia, bipolar disorder, and autism spectrum disorder exhibited a higher burden of transcriptomic dysfunction compared to males.
  • Female brains showed greater connectivity dysfunction and gene coexpression variability.
  • Sex-biased DEGs were enriched in modules related to immune and synaptic functions, with key genes including SCN2A, FGF14, and C3.

Conclusions:

  • Males and females display differential degrees of transcriptomic dysfunction in psychiatric diseases.
  • Immune and synaptic pathways are implicated in the observed sex differences in brain function related to psychiatric disorders.