Hydroxypropyl-β-cyclodextrin Enhances Oral Absorption of Silymarin Nanoparticles Prepared Using PureNano™ Continuous...

Area of Science:

• Pharmacology
• Materials Science
• Nanotechnology

Background:

• Oral drug bioavailability is often limited by poor solubility and membrane permeability.
• Silymarin (SLM), a beneficial compound, suffers from low oral bioavailability due to these limitations.

Purpose of the Study:

• To investigate the mechanism by which SLM nanoparticles (NPs) improve oral absorption.
• To evaluate SLM/hypromellose (HPMC)/hydroxypropyl-β-CyD (HP-β-CyD) NPs formulated via high-pressure crystallization and freeze-drying.

Main Methods:

• Preparation of SLM NPs using the PureNano™ high-pressure crystallization method.
• Freeze-drying of SLM NPs with HP-β-CyD as a stabilizer.
• Characterization of NP size, dissolution, solubility, wettability, and membrane permeability.

Main Results:

• SLM/HPMC/HP-β-CyD NPs showed a narrow size distribution (approx. 250 nm after hydration).
• The NPs exhibited rapid dissolution, high supersaturated solubility, and improved wettability.
• Enhanced membrane permeability was observed compared to original SLM powder.

Conclusions:

• Formulation of SLM NPs using PureNano™ and HP-β-CyD significantly improves SLM oral absorption.
• The enhanced absorption is attributed to improved solubility, wettability, and membrane permeability.
• This nanotechnology approach offers a promising strategy for overcoming SLM's bioavailability challenges.