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Related Experiment Video

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Ex utero Electroporation and Whole Hemisphere Explants: A Simple Experimental Method for Studies of Early Cortical Development
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Microarray analysis of the developing cortex.

Mawahib O Semeralul1, Paul C Boutros, Olga Likhodi

  • 1Department of Pharmacology, Faculty of Medicine, University of Toronto, Ontario, Canada.

Journal of Neurobiology
|October 3, 2006
PubMed
Summary

Gene expression in the developing mouse prefrontal cortex (PFC) decreases significantly after birth, particularly between weeks 2 and 4. This study maps these crucial postnatal transcriptomic changes.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Genomics

Background:

  • Abnormal prefrontal cortex (PFC) development is linked to childhood and adolescent-onset neuropsychiatric disorders.
  • While the basic PFC structure forms in utero, significant remodeling occurs throughout adolescence.

Purpose of the Study:

  • To comprehensively map gene transcript changes in the mouse PFC during postnatal development.
  • To identify specific gene functions and pathways affected during this critical period.

Main Methods:

  • Serial measurements of messenger RNA (mRNA) levels in mouse PFC using oligonucleotide microarrays.
  • Quantitative PCR (qPCR) to validate microarray findings for selected genes.

Main Results:

  • Observed significant changes in mRNA transcripts correlating with known postnatal developmental events.
  • Most significantly altered transcripts showed a progressive decrease in abundance after birth, with the most substantial changes occurring between postnatal weeks 2 and 4.
  • Decreased mRNA levels were noted for genes involved in cell proliferation, cytoskeletal function, extracellular matrix, membrane transport, protein folding, and regulation.

Conclusions:

  • Postnatal development of the mouse PFC involves widespread decreases in gene transcript abundance.
  • These transcriptomic changes impact fundamental cellular functions and processes critical for PFC maturation.
  • Understanding these developmental gene expression patterns is vital for insights into neuropsychiatric disorders with adolescent onset.