Nanoliposomes as Vehicles for Astaxanthin: Characterization, In Vitro Release Evaluation and Structure

Area of Science:

• Biotechnology
• Materials Science
• Pharmacology

Background:

• Astaxanthin is a potent antioxidant with limited bioavailability due to poor water dispersibility and stability.
• Nanoliposomes offer a promising delivery system for enhancing the properties of bioactive compounds.

Purpose of the Study:

• To encapsulate astaxanthin into nanoliposomes using a film dispersion-ultrasonic technique.
• To evaluate the physicochemical properties, stability, and membrane interactions of astaxanthin-loaded nanoliposomes.
• To assess the potential of nanoliposomes for improved astaxanthin delivery and bioavailability.

Main Methods:

• Film dispersion-ultrasonic technique for nanoliposome preparation.
• Particle size analysis, X-ray diffraction, differential scanning calorimetry, and thermal gravimetric analysis.
• Steady-state fluorescence spectroscopy to investigate membrane properties.

Main Results:

• High encapsulation efficiency and small, homodisperse particle size of astaxanthin-loaded nanoliposomes.
• Demonstrated interactions between astaxanthin and the lipid bilayer.
• Enhanced thermal stability and water dispersibility of encapsulated astaxanthin.
• Astaxanthin incorporation decreased membrane fluidity but increased micropolarity.

Conclusions:

• Nanoliposome encapsulation is an effective strategy to improve astaxanthin's stability, dispersibility, and bioavailability.
• Astaxanthin-loaded nanoliposomes can modulate liposomal membrane structure.
• This approach holds potential for continuous astaxanthin supply and therapeutic applications.