Tunable supramolecular self-assemblies based on cyclodextrin polymer as a loading platform for water-soluble drugs.

Area of Science:

• Materials Science
• Nanotechnology
• Pharmaceutical Sciences

Background:

• Efficient encapsulation of water-soluble drugs in nanocarriers remains a challenge.
• High drug loading capacity is essential for effective pharmaceutical preparations.

Purpose of the Study:

• To design a novel supramolecular delivery system for enhanced loading of water-soluble drugs.
• To investigate the drug loading mechanism and release characteristics of the developed system.

Main Methods:

• Construction of a supramolecular system using poly(β-cyclodextrin) with benzoic acid groups (PCD-PA) and adamantyl-terminated poly(ethylene glycol) (PEG-AD).
• Utilizing host-guest interactions, π-π stacking, and electrostatic interactions for drug encapsulation.
• Employing computational simulations to elucidate drug loading mechanisms.
• Evaluating drug release profiles in a weakly acidic environment.

Main Results:

• The poly(β-cyclodextrin)-poly(ethylene glycol) supramolecular system demonstrated significant loading capacity for water-soluble drugs.
• Mitoxantrone hydrochloride and doxorubicin hydrochloride achieved a high loading content of approximately 14%.
• Computational simulations confirmed the interaction-based drug loading mechanism.
• A weakly acidic environment was found to accelerate the release of certain drugs.

Conclusions:

• The developed self-assembled supramolecular nano-system shows great potential for delivering diverse water-soluble drugs.
• The system offers tunable composition and effective drug entrapment through multiple intermolecular interactions.
• This platform provides a promising approach for advancing pharmaceutical preparations of challenging drug molecules.