Chitosan Nanoparticle-Based Drug Delivery Systems: Advances, Challenges, and Future Perspectives

Area of Science:

• Biomaterials Science
• Nanotechnology
• Pharmaceutical Sciences

Background:

• Chitosan nanoparticles (CNPs) are increasingly explored for drug delivery applications.
• Challenges in drug delivery include poor bioavailability, especially for hydrophobic drugs, and systemic toxicity.
• Developing effective and safe drug delivery systems is crucial for improving therapeutic outcomes.

Purpose of the Study:

• To evaluate the effectiveness and applications of chitosan nanoparticles (CNPs) in drug delivery systems.
• To assess the encapsulation efficiency, drug release profiles, and bioavailability enhancement of CNPs.
• To investigate the stability, toxicity, and biocompatibility of CNPs for potential therapeutic use.

Main Methods:

• Chitosan nanoparticles (CNPs) were synthesized and characterized for drug encapsulation.
• In vitro studies were conducted to assess drug release kinetics at different pH values.
• In vivo studies, including histological analysis, were performed to evaluate systemic toxicity and biocompatibility.

Main Results:

• CNPs demonstrated high encapsulation efficiency (up to 90%) for various therapeutic agents.
• Extended drug release patterns were observed, significantly enhancing bioavailability, particularly for hydrophobic compounds.
• pH-sensitive swelling and gelation of CNPs facilitated targeted drug release in the intestine, with a 50-70% increase at specific pH values.
• In vivo tests showed significantly reduced systemic toxicity and no adverse effects at therapeutic dosages.
• Histological studies confirmed the biocompatibility and non-toxicity of CNPs.

Conclusions:

• Chitosan nanoparticles (CNPs) show significant potential as effective drug delivery vehicles.
• CNPs improve drug encapsulation, stability, bioavailability, and enable sustained, targeted release.
• The biocompatibility and low toxicity of CNPs support their suitability for long-term therapeutic applications, enhancing patient compliance.