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Updated: Jul 10, 2026
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Predicting Gene Silencing Through the Spatiotemporal Control of siRNA Release from Photo-responsive Polymeric Nanocarriers
Published on: July 21, 2017
Photo inducible RNA interference using cell permeable protein carrier
Tamaki Endoh1, Masahiko Sisido, Takashi Ohtsuki
1Department of Bioscience and Biotechnology, Okayama-University, 3-1-1 Tsushimanaka, Okayama 700-8530, Japan.
Nucleic Acids Symposium Series (2004)
|November 22, 2007
Summary
Researchers developed a novel protein carrier using cell-penetrating peptides and RNA binding domains for targeted intracellular delivery of short interfering RNA (siRNA) and short hairpin RNA (shRNA). This system enables light-activated gene silencing within specific cellular areas.
Area of Science:
- Biotechnology
- Molecular Biology
- Cell Biology
Background:
- Intracellular delivery of nucleic acids like shRNA and siRNA is crucial for gene silencing applications.
- Developing efficient and targeted delivery systems remains a significant challenge in molecular biology.
Purpose of the Study:
- To construct and evaluate a novel fluorescently labelled protein carrier for intracellular delivery of RNA.
- To investigate the targeted gene silencing capabilities of the protein carrier upon photo-irradiation.
Main Methods:
- Construction of a protein carrier from cell-penetrating peptide (CPP) and RNA binding domain (RBD).
- Specific binding of the protein carrier to RNA cargo with a sequence tag.
- Internalization into Chinese Hamster Ovary (CHO) cells.
- Photo-irradiation to induce redistribution of the protein/RNA complex.
- Assessment of gene silencing efficacy in photo-irradiated areas.
Main Results:
- The protein carrier successfully bound to and internalized RNA into CHO cells.
- Internalized protein/RNA complexes exhibited punctate cytoplasmic distribution.
- Photo irradiation induced widespread redistribution of RNA into the cytosol.
- Redistributed RNA effectively induced gene silencing specifically within the photo-irradiated region.
Conclusions:
- The developed protein carrier system facilitates targeted intracellular delivery of RNA.
- Photo-activated redistribution enhances the spread of RNA within the cytosol.
- This technology enables spatially controlled gene silencing, offering potential for precise therapeutic interventions.
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