Development of nobiliside A loaded liposomal formulation using response surface methodology
Yang Xiong1, Dan Guo, Lili Wang
1Department of Pharmaceutical Science, School of Pharmacy, Second Military Medical University, Shanghai 200433, China.
International Journal of Pharmaceutics
|January 24, 2009
Summary
Liposomes effectively reduced the toxicity and hemolysis of nobiliside A (Nob). Optimized liposome formulations demonstrated high encapsulation efficiency and low hemolytic rates, improving safety for intravenous administration.
Area of Science:
- Pharmaceutical Sciences
- Drug Delivery Systems
- Nanotechnology
Background:
- Nobiliside A (Nob) exhibits toxicity and hemolysis, limiting its therapeutic application.
- Liposomes offer a promising strategy to improve the safety profile of therapeutic agents.
Purpose of the Study:
- To develop and optimize liposome formulations for nobiliside A (Nob) delivery.
- To reduce the hemolytic rate (HR) and toxicity of Nob using liposomes.
- To evaluate the encapsulation efficiency (EE) and in vivo safety of Nob-loaded liposomes.
Main Methods:
- Liposome formulation optimization using Response Surface Methodology (RSM) with a Central Composite Rotatable Design (CCRD).
- Independent variables included phosphatidyl choline (PC) proportion, cholesterol (CH) proportion, and lipids/drug ratio.
- Dependent variables were encapsulation efficiency (EE) and hemolytic rate (HR).
Main Results:
- Cholesterol proportion and lipids/drug ratio significantly influenced EE.
- PC/CH ratio was a key factor affecting HR.
- Optimized liposomes achieved >95% EE and <1% HR at 80 microg mL(-1), with spherical morphology and uniform size.
- Intravenous LD50 increased from 4.1 mg kg(-1) for Nob solution to 9.5 mg kg(-1) for liposomal Nob.
Conclusions:
- Liposomes serve as a safe and effective carrier for intravenous delivery of nobiliside A.
- Formulation optimization via RSM successfully enhanced the therapeutic index of Nob.
- Liposomal delivery significantly mitigates the inherent toxicity and hemolytic properties of Nob.
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