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Generation of Cationic Nanoliposomes for the Efficient Delivery of In Vitro Transcribed Messenger RNA
Published on: February 1, 2019
A Versatile Strategy to Transform Cationic Polymers for Efficient and Organ-Selective mRNA Delivery.
Lixin Lin1, Kexin Su1, Xinyue Zhang1
1Eye Center of the Second Affiliated Hospital of Zhejiang University School of Medicine College of Pharmaceutical Sciences, Liangzhu Laboratory, State Key Laboratory of Advanced Drug Delivery and Release Systems, Zhejiang University, Hangzhou 310058, China.
Researchers developed a versatile strategy to create phospholipidated and alkylated polymers (PAPs) for targeted mRNA delivery. These PAPs significantly enhance in vivo mRNA expression and enable organ-specific delivery, showing great potential for mRNA therapeutics.
Area of Science:
- Biotechnology
- Materials Science
- Nanomedicine
Background:
- Messenger RNA (mRNA) therapeutics require efficient and targeted delivery systems.
- Cationic polymers show potential as genetic vectors but suffer from poor in vivo efficacy and variability.
- A universal functionalization strategy is needed to improve cationic polymer delivery capabilities.
Purpose of the Study:
- To develop a versatile strategy for transforming cationic polymers into effective mRNA delivery vehicles.
- To enhance the in vivo efficacy and organ-selectivity of mRNA delivery using modified cationic polymers.
- To demonstrate the potential of these modified polymers in vaccine applications and combination with lipid nanoparticles (LNPs).
Main Methods:
- A straightforward post-functionalization method was employed to create phospholipidated and alkylated polymers (PAPs) from commercial cationic polymers.
- The enhanced cellular uptake, endosomal escape, and mRNA release functionalities of PAPs were assessed.
- Organ-specific delivery was evaluated in vivo, including spleen-specific delivery with one-component PAPs and lung/liver-specific delivery with four-component LNPs formulated with PAPs.
- Vaccine efficacy was validated in a mouse melanoma model.
Main Results:
- PAPs demonstrated significantly enhanced mRNA expression in vivo, up to 30,500-fold higher than unmodified counterparts.
- One-component PAPs achieved spleen-specific mRNA delivery.
- Four-component LNPs formulated with PAPs enabled lung- and liver-specific mRNA delivery.
- These organ-selective systems outperformed existing polymer and LNP benchmarks.
Conclusions:
- The developed strategy offers a generalized method to create highly effective mRNA carriers from readily available cationic polymers.
- Phospholipidated and alkylated polymers (PAPs) represent a promising platform for efficient, organ-selective mRNA delivery.
- This approach holds substantial potential for the clinical translation of mRNA therapies requiring organ targeting.
