Curcumin-loaded polysaccharide nanoparticles: Optimization and anticariogenic activity against Streptococcus mutans.

Area of Science:

• Materials Science
• Nanotechnology
• Microbiology
• Pharmacology

Background:

• Curcumin, a natural compound, possesses antimicrobial properties but suffers from poor aqueous solubility.
• Nanoparticle formulations can enhance the delivery and efficacy of poorly soluble drugs like curcumin.
• Polysaccharides such as chitosan, alginate, and starch are biocompatible materials suitable for nanoparticle development.

Purpose of the Study:

• To develop and characterize curcumin-loaded polysaccharide nanoparticles (chitosan, alginate, starch).
• To evaluate the antimicrobial activity of these nanoparticles against Streptococcus mutans.
• To assess the potential of curcumin nanoparticles for applications in combating dental caries.

Main Methods:

• Curcumin was encapsulated into chitosan, alginate, and starch nanoparticles using the desolvation method.
• Particle size, loading efficiency, and in vitro release profiles were analyzed.
• Minimum inhibitory concentration (MIC) against Streptococcus mutans and efficacy on dental models were determined.

Main Results:

• Curcumin-loaded nanoparticles demonstrated enhanced aqueous solubility compared to free curcumin.
• Optimized conditions yielded nanoparticles with sizes ranging from 61.1 to 78.8 nm and loading efficiencies up to 14.3%.
• Chitosan nanoparticles exhibited the lowest MIC (0.114 mg/mL) against Streptococcus mutans, showing significant potential in biofilm inhibition on dental models.

Conclusions:

• Polysaccharide nanoparticles effectively improve curcumin's solubility and bioavailability.
• Curcumin-loaded chitosan nanoparticles show potent antimicrobial activity against Streptococcus mutans.
• These findings suggest curcumin-loaded chitosan nanoparticles are a promising candidate for developing novel dental decay fighting products.