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Preparation and Characterization of Lipophilic Doxorubicin Pro-drug Micelles
Published on: August 2, 2016
A simple one-step protocol for preparing small-sized doxorubicin-loaded liposomes
Shailesh Sonar1, Sandra E D'Souza, Kaushala Prasad Mishra
1Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India.
Summary
A new, simple method prepares doxorubicin-loaded liposomes efficiently in one step using ethanol injection. This extrusion-free protocol shows promise for large-scale cancer therapy production.
Area of Science:
- Pharmaceutical Sciences
- Biotechnology
- Nanotechnology
Background:
- Liposomes are crucial drug delivery systems for cancer therapy.
- Efficient encapsulation of chemotherapeutic agents like doxorubicin is essential for efficacy.
- Current methods for liposome preparation can be complex and time-consuming.
Purpose of the Study:
- To develop a simple, single-step, extrusion-free protocol for doxorubicin-loaded liposomes.
- To optimize parameters for efficient doxorubicin encapsulation and controlled liposome size.
- To assess the feasibility of this method for large-scale production.
Main Methods:
- Utilized the ethanol injection method (EIM) for liposome preparation.
- Investigated various parameters including phospholipid concentration, injection ratio, lipid composition, and drug-to-phospholipid ratio.
- Characterized liposome size and doxorubicin encapsulation efficiency.
Main Results:
- Achieved high doxorubicin encapsulation efficiency (up to 98%) in a single step.
- Identified optimal conditions (50 mM lipid stock, 1:10 injection ratio) yielding 96.0 +/- 2.92% encapsulation and 135 +/- 2.32 nm diameter.
- Demonstrated that altering phospholipid type (DSPC, DMPC, DPPC) did not significantly impact size or encapsulation.
Conclusions:
- The developed ethanol injection method offers a straightforward and efficient approach for doxorubicin-loaded liposome preparation.
- This extrusion-free protocol is suitable for large-scale production, potentially advancing cancer therapy.
- The method provides a promising foundation for the development of novel liposomal drug delivery systems.
