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Application of RNA interference to chicken embryos using small interfering RNA
Fuminori Sato1, Tetsuto Nakagawa, Makoto Ito
1Laboratory of Reproductive Physiology and Biotechnology, Department of Animal and Marine Bioresource Sciences, Kyushu University, Hakozaki, Fukuoka, Japan.
Journal of Experimental Zoology. Part A, Comparative Experimental Biology
|September 28, 2004
Summary
Gene silencing using small interfering RNA (siRNA) is now applicable in chicken embryos. This study demonstrates siRNA effectively suppresses gene expression in avian embryos, enabling functional gene analysis during development.
Area of Science:
- Molecular Biology
- Developmental Biology
- Genetics
Background:
- Gene silencing via RNA interference (RNAi) using small interfering RNA (siRNA) is a powerful tool in many species.
- However, established protocols for siRNA-mediated gene silencing in avian species, particularly during embryogenesis, are lacking.
Purpose of the Study:
- To evaluate the efficacy and specificity of RNA interference (RNAi) in chicken embryos.
- To establish a method for gene silencing in avian embryogenesis for functional gene studies.
Main Methods:
- A dual fluorescence reporter assay was employed using plasmids encoding Green Fluorescent Protein (GFP) and Red Fluorescent Protein (RFP).
- siRNA targeting GFP mRNA (GFP-siRNA) was introduced into cultured cells and whole chicken embryos via lipofection and microelectroporation.
- Gene and protein expression levels were analyzed using fluorescent microscopy, flow cytometry, and reverse transcription-polymerase chain reaction (RT-PCR).
Main Results:
- Co-introduction of GFP and RFP plasmids resulted in strong fluorescence in cells.
- Introduction of GFP-siRNA significantly suppressed green fluorescence and decreased GFP mRNA levels, while red fluorescence and RFP mRNA remained unaffected.
- Specific suppression of GFP expression was observed in whole chicken embryos, persisting for at least 72 hours.
Conclusions:
- Gene silencing using siRNA is effective and specific in chicken embryos.
- This methodology provides a valuable tool for analyzing gene function during avian embryogenesis.