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[Liposome preparation by a reverse-phase evaporation method and freezing-thawing]
Biulleten' Eksperimental'Noi Biologii I Meditsiny
|August 1, 1984
Summary
This study details a novel method for creating liposomes encapsulating 14C-DTPA using phase-reverse evaporation and freezing-thawing. This technique efficiently loads hydrophilic compounds into liposomal suspensions for potential drug delivery applications.
Area of Science:
- Pharmaceutical Sciences
- Biotechnology
- Nanotechnology
Background:
- Liposomes are versatile drug delivery vehicles.
- Efficient encapsulation of hydrophilic compounds remains a challenge.
- Developing scalable methods for liposome preparation is crucial.
Purpose of the Study:
- To describe a method for preparing liposomes containing Na3Ca-14C-DTPA.
- To optimize liposome formation using phase-reverse evaporation and freezing-thawing.
- To evaluate the encapsulation efficiency and physical characteristics of the prepared liposomes.
Main Methods:
- Phase-reverse evaporation technique.
- Freezing-thawing cycles for liposome transformation.
- Lipid concentration optimization (over 20-30 mg/ml).
Main Results:
- Liposomes formed contain 10-14 µL aqueous phase per µmol phosphatidylcholine.
- Liposome diameter ranges from 0.2 to 1.5 µm (mean 0.45-0.54 µm).
- Up to 70-80% of 14C-DTPA can be encapsulated by increasing lipid concentration.
Conclusions:
- The described method is effective for preparing liposomes with high encapsulation efficiency.
- The method is suitable for Na3Ca-14C-DTPA and potentially other hydrophilic drug compounds.
- This technique offers a viable approach for liposomal drug formulation.