Spray-dried Solid Lipid Nanoparticles for Enhancing Berberine Bioavailability via Oral Administration

Area of Science:

• Pharmaceutical Sciences
• Nanotechnology
• Drug Delivery Systems

Background:

• Berberine (BBR) exhibits therapeutic potential for chronic diseases including diabetes, hyperlipemia, hypertension, and Alzheimer's disease.
• Low oral bioavailability of BBR limits its therapeutic applications.
• Solid lipid nanoparticles (SLNs) offer a strategy to improve BBR absorption and systemic circulation.

Purpose of the Study:

• To prepare and characterize berberine-loaded solid lipid nanoparticles (BBR-SLNs).
• To evaluate the potential of BBR-SLNs as an oral drug delivery system.
• To assess the physicochemical properties, in vitro release, and cytotoxicity of BBR-SLNs.

Main Methods:

• BBR-SLNs were prepared using ultrasonication and spray-drying.
• Particle size and morphology were analyzed using dynamic light scattering (DLS) and scanning electron microscopy (SEM).
• Encapsulation efficiency, loading capacity, stability, in vitro release, and cytotoxicity were evaluated.

Main Results:

• BBR-SLNs exhibited homogeneous particle sizes below 200 nm with high encapsulation efficiency (~90%) and loading capacity (>12%).
• The spray-dried BBR-SLN powder demonstrated good redispersibility and stability for 30 days.
• Spray-dried BBR-SLNs showed sustained in vitro release over 24 hours and no significant cytotoxicity, with increased cell viability in HEK293 cells.

Conclusions:

• Solid lipid nanoparticles (SLNs) represent a promising drug delivery system for enhancing the oral administration of berberine.
• The developed BBR-SLNs improve BBR's physicochemical properties and release profile.
• This approach could broaden the therapeutic applications of berberine for various chronic conditions.