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Genomic Imprinting and Inheritance02:30

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In Vitro Modeling of Down Syndrome Neurogenesis Using Human-Induced Pluripotent Stem Cells
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Modeling Genomic Imprinting Disorders Using Induced Pluripotent Stem Cells.

Stormy J Chamberlain1, Noelle D Germain2, Pin-Fang Chen2

  • 1University of Connecticut Health Center, 400 Farmington Avenue, Farmington, CT, 06030-6403, USA. chamberlain@uchc.edu.

Methods in Molecular Biology (Clifton, N.J.)
|December 19, 2014
PubMed
Summary

Induced pluripotent stem cells (iPSCs) model genomic imprinting disorders. Researchers verified that epigenetic marks, crucial for allele-specific gene expression, are maintained in iPSCs derived from parental somatic cells.

Keywords:
Allele-specific PCRDNA methylationGenomic imprintingInduced pluripotent stem cellsRNA FISH

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Area of Science:

  • Stem Cell Biology
  • Epigenetics
  • Genetics

Background:

  • Induced pluripotent stem cell (iPSC) technology enables modeling of genetic disorders.
  • Genomic imprinting, involving epigenetic modifications, causes allele-specific gene expression.
  • Reprogramming somatic cells into iPSCs erases and reestablishes most epigenetic marks.

Purpose of the Study:

  • To verify the maintenance of genomic imprinting and allele-specific gene expression in iPSCs.
  • To establish reliable iPSC models for neurogenetic disorders linked to genomic imprinting.
  • To validate the imprinting status in iPSC derivatives of parental somatic cells.

Main Methods:

  • DNA methylation analysis to assess epigenetic modifications.
  • Allele-specific PCR to detect allele-specific gene expression.
  • RNA FISH (Fluorescence In Situ Hybridization) for spatial gene expression analysis.

Main Results:

  • Demonstrated successful application of DNA methylation analysis, allele-specific PCR, and RNA FISH.
  • Confirmed the maintenance of imprinting status and allele-specific gene expression patterns in iPSCs.
  • Validated iPSC models for studying chromosome 15q11-q13 neurogenetic disorders.

Conclusions:

  • The described techniques are effective for analyzing genomic imprinting in iPSC models.
  • iPSC technology can reliably model disorders of genomic imprinting, including those involving chromosome 15q11-q13 copy number variations.
  • Accurate verification of epigenetic marks is essential for robust iPSC-based disease modeling.