Chitosan microparticle preparation for controlled drug release by response surface methodology

Area of Science:

• Pharmaceutical Sciences
• Materials Science

Background:

• Chitosan microparticles offer potential for controlled drug delivery.
• Optimizing formulation variables is crucial for predictable drug release kinetics.

Purpose of the Study:

• To investigate formulation variables affecting drug release from chitosan microparticles.
• To optimize chitosan microparticle formulation for controlled felodipine release using response surface methodology.

Main Methods:

• Chitosan microparticles were prepared via ionic cross-linking with sodium tripolyphosphate (TPP).
• A central composite design was employed to study chitosan concentration, TPP pH, and cross-linking time.
• Felodipine was used as the model drug to assess release behavior.

Main Results:

• Chitosan concentration and cross-linking time negatively impacted felodipine release.
• TPP pH positively influenced drug release and was the most significant factor.
• Optimal conditions yielded 100% felodipine release within 24 hours.

Conclusions:

• Formulation parameters significantly influence the drug release profile of chitosan microparticles.
• Optimized chitosan microparticle formulations can achieve rapid and complete drug release.
• This study provides a framework for developing controlled-release drug delivery systems using chitosan.