A novel method to prepare liposomes containing amikacin.

Area of Science:

• Pharmaceutical Sciences
• Drug Delivery Systems
• Nanotechnology

Background:

• Liposomal formulations enhance drug delivery and therapeutic efficacy.
• Amikacin is an aminoglycoside antibiotic used to treat bacterial infections.
• Optimizing liposome preparation is crucial for effective drug encapsulation and release.

Purpose of the Study:

• To develop and evaluate a novel method for preparing liposomal amikacin.
• To compare the encapsulation efficiency of the new method with existing techniques.
• To investigate the impact of drug-to-lipid ratio and lecithin:cholesterol composition on amikacin encapsulation and in vitro release.

Main Methods:

• Liposomal amikacin was prepared using a novel method combining proliposome preparation with freeze-drying.
• Comparative liposome preparations were made using the cast film and proliposome methods.
• Encapsulation efficiency was determined, and the influence of drug-to-lipid ratio was assessed.
• In vitro amikacin efflux from liposomes with varying lecithin:cholesterol ratios was investigated.

Main Results:

• The novel proliposome-freeze-drying method resulted in the highest amikacin encapsulation efficiency.
• Drug-to-lipid ratio significantly influenced encapsulation efficiency.
• Liposome composition (lecithin:cholesterol ratio) affected the in vitro efflux of amikacin.

Conclusions:

• The novel proliposome-freeze-drying technique offers a superior approach for developing highly efficient liposomal amikacin formulations.
• Optimized drug-to-lipid ratios and lecithin:cholesterol compositions are critical for maximizing encapsulation and controlling amikacin release.
• This method holds promise for improving amikacin's therapeutic potential through enhanced liposomal delivery.