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An oligonucleotide microarray for mouse imprinted genes profiling.

A Vigé1, C Gallou-Kabani, M S Gross

  • 1Inserm, AP-HP, U383, Hôpital Necker-Enfants Malades, Paris, France.

Cytogenetic and Genome Research
|April 1, 2006
PubMed
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This study introduces a novel mouse imprinting microchip for profiling imprinted genes. This tool aids in understanding how these genes, crucial for development, respond to diet and environmental factors.

Area of Science:

  • Epigenetics and Developmental Biology
  • Genomics and Bioinformatics

Background:

  • Genomic imprinting is a mammalian-specific epigenetic process causing parent-of-origin gene expression, leading to developmental asymmetry.
  • Understanding imprinted gene function is vital for deciphering complex biological processes and disease mechanisms.

Purpose of the Study:

  • To develop and validate a custom oligonucleotide microarray (mouse imprinting microchip) for efficient profiling of imprinted genes.
  • To demonstrate the utility of this microchip in analyzing differential gene expression in response to dietary variations.

Main Methods:

  • Construction of a custom oligonucleotide microarray featuring 493 genes, including known imprinted genes, epigenetic regulators, metabolism, obesity, and neurotransmission genes.
  • Application of the microchip to analyze gene expression in liver, placenta, and embryo tissues of C57BL6/J mice under different dietary conditions.

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  • Validation of microchip data using quantitative real-time PCR and application of robust statistical analyses.

    • Main Results:

    • The study successfully profiled 493 genes, including 63 known imprinted genes, using the custom microchip.
    • Differential expression patterns of these genes were observed across different tissues and in response to varying diets.
    • Data confirmed the reliability and accuracy of the microchip-based expression analysis.

    Conclusions:

    • The developed mouse imprinting microchip offers a manageable and expandable platform for studying imprinted genes.
    • This tool facilitates deeper insights into the role of imprinted genes in development, physiology, and disease, particularly in response to environmental factors.
    • The microchip's design allows for future expansion to include newly discovered imprinted genes, enhancing its utility in ongoing research.