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Controlled release of nitric oxide from liposomes
Dakota J Suchyta1, Mark H Schoenfisch1
1Department of Chemistry, The University of North Carolina at Chapel Hill, 131 South Rd., Chapel Hill, North Carolina, 27599.
ACS Biomaterials Science & Engineering
|April 21, 2020
Summary
Researchers tuned nitric oxide (NO) release from liposomes by modifying NO donors and lipids. This controlled NO delivery, even in biological fluids, shows potential for NO-based therapeutics.
Area of Science:
- Biomedical Engineering
- Drug Delivery Systems
- Materials Science
Background:
- Nitric oxide (NO) plays crucial roles in physiological processes.
- Developing controlled NO-release systems is vital for therapeutic applications.
- Liposomes offer a versatile platform for encapsulating therapeutic agents.
Purpose of the Study:
- To investigate methods for tuning nitric oxide (NO) release from liposomal structures.
- To explore the influence of NO donor structure and phospholipid composition on NO release kinetics.
- To assess the stability and release profile of NO-releasing liposomes in biological environments.
Main Methods:
- Synthesized N-diazeniumdiolate-encapsulated liposomes.
- Modified NO donor molecules and phospholipid compositions.
- Characterized NO release kinetics in vitro.
- Evaluated liposome performance in buffer and serum.
Main Results:
- NO release rate was tunable by altering NO donor stability and phospholipid headgroup surface area.
- More stable NO donors extended NO release up to 48 hours.
- Phospholipid composition influenced water uptake, affecting NO donor breakdown and NO release.
- NO release kinetics remained consistent in buffer and serum.
Conclusions:
- Liposomal encapsulation allows for tunable NO release.
- Both NO donor structure and liposome formulation are key factors in controlling NO delivery.
- NO-releasing liposomes demonstrate stability and predictable release in biological fluids, supporting therapeutic potential.
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