Sunfish cationic amphiphiles: toward an adaptative lipoplex morphology

Area of Science:

• Biochemistry
• Materials Science
• Nanotechnology

Background:

• Cationic amphiphiles are crucial for gene delivery systems.
• Designing novel amphiphiles with tunable properties is essential for improving transfection efficiency.
• Sunfish amphiphiles represent a new class with unique structural features.

Purpose of the Study:

• To conduct a detailed physicochemical study of novel Sunfish amphiphiles.
• To investigate the relationship between amphiphile structure and aggregate morphology.
• To correlate structural parameters with cellular transfection efficiencies.

Main Methods:

• Dynamic Light Scattering (DLS)
• Differential Scanning Calorimetry (DSC)
• Nuclear Magnetic Resonance (NMR)
• Small-Angle X-ray Scattering (SAXS)
• Cryo-Transmission Electron Microscopy (Cryo-TEM)
• Fluorescence spectroscopy

Main Results:

• Sunfish amphiphiles exhibit distinct aggregate morphologies based on tail folding.
• Structural variations, including tail unsaturation and chain length, impact aggregate properties.
• Amphiphiles forming easily hydrated, fluid aggregates that transition to an inverted hexagonal phase with plasmid DNA showed superior transfection.

Conclusions:

• The physicochemical properties and aggregate behavior of Sunfish amphiphiles are highly dependent on their molecular structure.
• Tail conformation and hydration significantly influence the formation of functional gene delivery complexes.
• Optimized Sunfish amphiphiles demonstrate potential for effective gene delivery applications.