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Preparation and Characterization of Nanoliposomes for the Entrapment of Bioactive Hydrophilic Globular Proteins

Preparation and Characterization of Nanoliposomes for the Entrapment of Bioactive Hydrophilic Globular Proteins

Published on: August 31, 2019

Comparative study on preparative methods of DC-Chol/DOPE liposomes and formulation optimization by determining

Shuoye Yang¹, Jiayin Chen, Di Zhao

¹Center of Drug Metabolism and Pharmacokinetics, College of Pharmacy, China Pharmaceutical University, Nanjing, PR China.

International Journal of Pharmaceutics

|May 31, 2012

Summary

The dry-film method yields the best quality cationic liposomes for gene delivery. Formulation optimization using Box Behnken design achieved high plasmid DNA encapsulation efficiency.

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Area of Science:

Biotechnology
Pharmaceutical Sciences
Materials Science

Background:

Cationic liposomes are crucial non-viral vectors for gene delivery.
Optimizing preparation methods and formulations is key to enhancing their efficiency and stability.

Purpose of the Study:

To compare three common methods (dry-film, reverse phase evaporation, ethanol injection) for preparing cationic liposomes (DC-Chol/DOPE).
To develop and apply a Sephadex filtration method for quantifying plasmid DNA encapsulation efficiency.
To optimize cationic liposome formulation using Box-Behnken design for improved encapsulation efficiency.

Main Methods:

Preparation of cationic liposomes using dry-film, reverse phase evaporation, and ethanol injection methods.
Characterization of liposomes via morphology, particle size, and zeta potential analysis.
Quantification of plasmid DNA encapsulation efficiency using a developed Sephadex filtration method.
Formulation optimization employing Box-Behnken design with encapsulation efficiency as the response variable.

Main Results:

Liposomes prepared by the dry-film method exhibited superior quality and stability.
The Box-Behnken design successfully optimized the formulation, yielding predicted encapsulation efficiencies that closely matched measured values.
The developed Sephadex filtration method proved effective for determining encapsulation efficiency.

Conclusions:

The dry-film preparation method is advantageous for producing high-quality, stable cationic liposomes.
Formulation parameters significantly impact the encapsulation efficiency of plasmid DNA in cationic liposomes.
This study provides a methodological reference for optimizing liposome-based gene delivery systems.