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Phenotypic differences in hiPSC NPCs derived from patients with schizophrenia.

K Brennand1, J N Savas2, Y Kim3

  • 11] Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA [2] Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA [3] Salk Institute for Biological Studies, Laboratory of Genetics, La Jolla, CA, USA.

Molecular Psychiatry
|April 2, 2014
PubMed
Summary

Human induced pluripotent stem cell (hiPSC)-derived neurons resemble fetal brain tissue, suggesting they model schizophrenia (SZ) predisposition. SZ hiPSC neural progenitor cells (NPCs) exhibit conserved gene signatures, cytoskeletal defects, and oxidative stress, offering insights into SZ developmental mechanisms.

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Area of Science:

  • Neuroscience
  • Genetics
  • Stem Cell Biology

Background:

  • Human induced pluripotent stem cells (hiPSCs) differentiated into neurons are immature, resembling fetal brain tissue.
  • This immaturity suggests hiPSC-based models may be better suited for studying schizophrenia (SZ) predisposition rather than late-stage disease features.

Purpose of the Study:

  • To investigate conserved gene signatures and cellular phenotypes in SZ hiPSC neural progenitor cells (NPCs).
  • To identify potential developmental mechanisms contributing to schizophrenia.

Main Methods:

  • Gene expression analysis using microarrays.
  • Quantitative proteomic mass spectrometry (SILAC) on SZ hiPSC NPCs from four patients.
  • Assays for cell migration and oxidative stress.

Main Results:

  • A significant fraction of the SZ gene signature is conserved in SZ hiPSC NPCs.
  • SZ hiPSC NPCs display abnormal gene expression and protein levels linked to cytoskeletal remodeling and oxidative stress.
  • Aberrant migration and increased oxidative stress were observed in SZ hiPSC NPCs.

Conclusions:

  • hiPSC-derived NPCs from SZ patients exhibit reproducible phenotypes relevant to disease predisposition.
  • These findings highlight the potential of hiPSC NPCs as a tool to study schizophrenia's developmental underpinnings.
  • Scalable assays for NPC phenotypes can be applied to larger patient cohorts for further research.