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Updated: Jul 16, 2026
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Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
Published on: February 6, 2020
Cationic Amphiphiles with Five-Membered Heterocyclic Linkers: Synthesis, Self-Assembly, and DNA Complexation
Anda Sipola1,2, Ksenija Korotkaja3, Karlis Pajuste1
1Latvian Institute of Organic Synthesis, Aizkraukles 21, LV-1006 Riga, Latvia.
Materials (Basel, Switzerland)
|July 15, 2026
Summary
Novel cationic lipids with five-membered heterocyclic linkers show enhanced DNA delivery. These new lipid structures improve self-assembly and nucleic acid encapsulation for gene therapy applications.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Gene Therapy
Background:
- Lipid-based nanoparticles are key non-viral vectors for nucleic acid delivery.
- The molecular structure of cationic lipids critically impacts their gene delivery efficiency.
Purpose of the Study:
- To explore five-membered heterocyclic linkers as a novel structural motif in cationic amphiphilic lipids.
- To synthesize and evaluate novel lipids with pyrrole, furan, and thiophene linkers for gene delivery.
- To understand how linker type influences physicochemical properties and self-assembly behavior.
Main Methods:
- Synthesis of novel cationic lipids with heterocyclic and aliphatic linkers.
- Characterization of self-assembly in aqueous media using dynamic light scattering.
- Measurement of plasmid DNA (pDNA) encapsulation efficiency using the Quant-iT Pico-Green assay.
Main Results:
- Liposomes and lipoplexes formed with heterocyclic lipids showed varying hydrodynamic diameters (92–1317 nm and 302–1159 nm, respectively).
- Amphiphiles with heterocyclic linkers achieved high pDNA encapsulation (>80% at optimal N/P ratios).
- Aliphatic analogues exhibited significantly lower pDNA encapsulation efficiency.
Conclusions:
- Linker structure profoundly impacts lipid self-assembly and nucleic acid binding capabilities.
- Five-membered heterocycles are promising structural elements for designing effective lipid-based gene delivery systems.
- Structure-activity relationship evaluation supports the rational development of advanced gene delivery candidates.
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