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Microfluidic Production of Lysolipid-Containing Temperature-Sensitive Liposomes
Published on: March 3, 2020
Thermally gated liposomes: a closer look
Ravil R Petrov1, Wen-Hua Chen, Steven L Regen
1Department of Chemistry, Lehigh University, Bethlehem, PA 18015, USA.
Bioconjugate Chemistry
|April 21, 2009
Summary
Novel pore-forming amphiphiles (PFAs) act as thermal gates to control sucrose release from liposomes. Release is sensitive to PFA properties and temperature, indicating liposome heterogeneity.
Area of Science:
- Biochemistry
- Materials Science
- Drug Delivery
Background:
- Liposomes are versatile drug delivery vehicles.
- Controlling cargo release from liposomes is crucial for targeted therapy.
- Pore-forming amphiphiles (PFAs) offer a potential mechanism for triggered release.
Purpose of the Study:
- To investigate the use of homologous series of PFAs derived from cholic acid, lysine, and spermine as thermal gates.
- To evaluate the release of sucrose from liposomes composed of DPPC and DPPG using these PFAs.
- To determine the influence of PFA characteristics and temperature on release kinetics.
Main Methods:
- Synthesis of a homologous series of PFAs.
- Preparation of liposomes from DPPC and DPPG.
- Binding assays to determine PFA-liposome interactions.
- Sucrose release experiments under varying temperature conditions.
Main Results:
- PFAs bind effectively to gel-state liposomes (DPPC/DPPG) with negligible transfer to fluid phases.
- Sucrose release is modulated by PFA size and concentration.
- Temperature-dependent release observed, particularly in the gel/fluid coexistence region, suggesting liposome heterogeneity.
Conclusions:
- PFAs can function as effective thermal gates for liposomal cargo release.
- The release mechanism is tunable by PFA design and concentration.
- Liposome heterogeneity plays a role in temperature-sensitive release, offering insights for advanced delivery systems.
