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Two Thalamic Regions Screened Using Laser Capture Microdissection with Whole Human Genome Microarray in Schizophrenia

Kalindi Bakshi1, Eileen M Kemether1

  • 1Department of Psychiatry, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, NYC, NY 10029, USA.

Schizophrenia Research and Treatment
|June 23, 2020
PubMed
Summary

Schizophrenia research identified specific gene expression changes in thalamic regions. These findings highlight microRNAs, synaptic function, and potential transcriptional repression in the disease.

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Area of Science:

  • Neuroscience
  • Genetics
  • Molecular Biology

Background:

  • Schizophrenia is a complex neurological disorder with poorly understood genetic underpinnings.
  • The thalamus plays a crucial role in brain function and is implicated in schizophrenia.
  • Identifying specific gene expression changes in distinct brain regions is vital for understanding disease mechanisms.

Purpose of the Study:

  • To identify brain region-specific gene expression differences in postmortem thalamic samples from individuals with schizophrenia and controls.
  • To investigate potential transcriptional targets and molecular pathways affected in schizophrenia.
  • To explore the role of microRNAs and specific genes in thalamic dysfunction.

Main Methods:

  • Whole human genome microarray screening was performed on highly enriched neuronal populations.
  • Two distinct thalamic regions were analyzed from the same subjects to minimize intersubject variability.
  • Gene expression data was analyzed to identify differences between schizophrenia patients and controls.

Main Results:

  • Significant gene expression differences were observed, particularly related to miRNA-137 and other schizophrenia-associated microRNAs.
  • Key genes including ELAVL1, BDNF, DISC-1, MECP2, and YWHAG showed altered expression.
  • Findings implicated changes in synaptic function and receptors, with potential evidence for transcription repression.

Conclusions:

  • The study identified specific molecular signatures in thalamic regions relevant to schizophrenia.
  • MicroRNA dysregulation and altered synaptic gene expression are implicated in the pathophysiology of schizophrenia.
  • The findings suggest a role for transcriptional repression in the disease process and provide novel targets for future research.