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Dendrimeric HIV-peptide delivery nanosystem affects lipid membranes structure
Katarzyna Milowska1, Aleksandra Rodacka2, Sophie Melikishvili3
1Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236, Lodz, Poland.
Scientific Reports
|August 20, 2021
Summary
HIV peptide/dendrimer complexes interact with lipid membranes, with stronger binding to negatively charged lipids. These findings are crucial for developing effective HIV vaccines and antigen delivery systems.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Virology
Background:
- HIV peptide/dendrimer complexes (dendriplexes) are potential antigen delivery vehicles.
- Understanding their interaction with lipid membranes is key for vaccine development.
Purpose of the Study:
- To investigate the interaction mechanisms between HIV dendriplexes and artificial lipid membranes.
- To characterize the binding affinity and nature of these interactions.
Main Methods:
- Dynamic Light Scattering (DLS)
- Fluorescence Anisotropy
- Differential Scanning Calorimetry (DSC)
- Langmuir-Blodgett method
- Transmission Electron Microscopy (TEM)
Main Results:
- Dendriplexes interact with both hydrophilic and hydrophobic lipid membrane regions.
- Interactions are stronger with negatively charged lipids (DMPC-DPPG) than zwitterionic lipids (DMPC).
- Electrostatic forces dominate interactions with negatively charged lipids; hydrophobic disturbances occur with zwitterionic lipids.
Conclusions:
- Dendriplexes exhibit distinct interaction patterns with different lipid compositions.
- These insights are vital for designing optimized antigen delivery systems for HIV vaccines.
