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Generation of Cationic Nanoliposomes for the Efficient Delivery of In Vitro Transcribed Messenger RNA
Published on: February 1, 2019
Comparative gene transfer between cationic and thiourea lipoplexes.
Marie Breton1, Jeanne Leblond, Johanne Seguin
1Inserm, U640, CNRS, UMR8151, Unité de Pharmacologie Chimique et Génétique, Université Paris Descartes, Faculté de Pharmacie, Paris, France.
The Journal of Gene Medicine
|November 26, 2009
Summary
Thiourea lipoplexes achieve similar gene delivery efficiency as cationic lipoplexes, despite lower cellular uptake. This is due to their enhanced ability to destabilize cell membranes and release DNA rapidly.
Area of Science:
- Biochemistry
- Molecular Biology
- Gene Therapy
Background:
- Lipopolythiourea lipids were developed as neutral DNA condensing agents for systemic gene delivery.
- Structural optimization yielded efficient transfecting agents, prompting further investigation.
Purpose of the Study:
- To compare the cellular internalization and intracellular transfection mechanisms of thiourea lipoplexes with cationic lipoplexes.
- To elucidate the role of lipoplex structure in gene delivery efficacy.
Main Methods:
- Cytotoxicity assessed via MTT assay.
- Transfection efficiency measured by luciferase activity.
- Cellular uptake and DNA release kinetics monitored using confocal microscopy and flow cytometry.
Main Results:
- Thiourea lipoplexes showed six-fold lower internalization than cationic lipoplexes.
- Both lipoplex types effectively permeated the cytoplasmic membrane for 30 kDa molecules.
- DNA release into the cytoplasm was significantly faster for thiourea lipoplexes (<10 min vs. 30 min).
Conclusions:
- Thiourea lipoplexes achieve comparable transfection levels to cationic lipoplexes.
- Enhanced cytoplasmic membrane destabilization and rapid DNA release contribute to thiourea lipoplex efficacy.
- These findings highlight the potential of thiourea lipids for gene delivery applications.
