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Cell Squeezing as a Robust, Microfluidic Intracellular Delivery Platform
Published on: November 7, 2013
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Development of an inducible platform for intercellular protein delivery.
Richard Siller1, Eric Dufour2, Max Lycke3
1Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, PO Box 1112 Blindern, Oslo 0317, Norway; Norwegian Center for Stem Cell Research, PO Box 1112 Blindern, Oslo 0317, Norway.
International Journal of Pharmaceutics
|March 4, 2017
Summary
This study introduces a novel inducible protein export and uptake platform for enhanced protein delivery. The system ensures genuine cellular translocation, overcoming limitations in current protein-based therapies.
Area of Science:
- Biotechnology
- Molecular Biology
- Cell Biology
Background:
- Protein-based therapies face challenges in production, biological activity, and cellular delivery.
- Existing methods like protein transduction domains often lack specificity and efficiency.
- Distinguishing genuine cellular translocation from fixation artifacts remains a critical issue.
Purpose of the Study:
- To develop and validate a novel inducible platform for controlled protein export and cellular uptake.
- To address the limitations of specificity and efficiency in protein delivery systems.
- To confirm genuine cellular translocation of engineered fusion proteins.
Main Methods:
- Utilized a Tetracycline-inducible system for controlled gene expression.
- Engineered a fusion protein with a human chorionic gonadotropin beta-subunit signal peptide for export.
- Incorporated a poly-arginine domain for efficient cell penetration and uptake.
- Validated the system using enhanced green fluorescent protein (EGFP) as a reporter.
Main Results:
- Doxycycline successfully induced the expression of the fusion protein.
- The human chorionic gonadotropin beta-subunit facilitated efficient export of the fusion protein into the media.
- The poly-arginine domain mediated effective uptake into neighboring target cells.
- Confirmed genuine translocation, distinguishing it from fixation artifacts.
Conclusions:
- The developed platform enables inducible export and uptake of proteins, enhancing delivery efficiency.
- This system overcomes key challenges in protein-based therapies, offering improved specificity and confirmed translocation.
- Potential applications span stem cell biology, immunotherapy, and cancer targeting therapies.
