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Related Experiment Videos

RNAi in living mice.

Hidetoshi Hasuwa1, Masaru Okabe

  • 1Genome Information Research Center, Osaka University, Japan.

Methods in Molecular Biology (Clifton, N.J.)
|March 16, 2004
PubMed
Summary
This summary is machine-generated.

This study demonstrates RNA interference (RNAi) can silence gene expression in mice and rats. Transgenic animals produced double-stranded RNA (dsRNA) to effectively reduce green fluorescent protein (GFP) expression throughout their bodies and lifetimes.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biotechnology

Background:

  • RNA interference (RNAi) is a gene silencing mechanism involving double-stranded RNA (dsRNA).
  • RNAi is a powerful tool for reverse genetics, particularly in model organisms like Caenorhabditis elegans.
  • Previous studies indicated the potential for RNAi application in mammalian systems.

Purpose of the Study:

  • To demonstrate the efficacy of RNAi for silencing gene expression in vivo using mammalian models.
  • To establish a method for sustained gene silencing using transgenic expression of dsRNA.
  • To validate the use of green fluorescent protein (GFP) as a reporter gene for RNAi studies in mice and rats.

Main Methods:

  • Development of transgenic mouse and rat lines expressing dsRNA targeting GFP.

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  • Utilizing the H1 promoter to drive dsRNA transcription.
  • Monitoring GFP expression levels in transgenic animals to assess silencing efficacy.

    • Main Results:

    • Transgenic expression of dsRNA successfully silenced GFP expression in both mice and rats.
    • Gene silencing was observed systemically throughout the body of the animals.
    • The RNAi-mediated silencing effect was sustained for the lifetime of the animals.

    Conclusions:

    • RNAi is an effective strategy for achieving long-term, systemic gene silencing in mammalian models.
    • Transgenic dsRNA expression offers a robust platform for functional genomics and therapeutic applications in mammals.
    • This approach provides a valuable tool for studying gene function in vivo.