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Praziquantel-loaded PLGA nanoparticles: preparation and characterization
R M Mainardes1, R C Evangelista
1UNESP, Araraquara, SP, Brazil. mainardes@fcfar.unesp.br
Journal of Microencapsulation
|July 16, 2005
Summary
Poly (D,L-lactide-co-glycolide) nanoparticles encapsulating praziquantel were created. Methylene chloride resulted in larger particles but higher praziquantel entrapment efficiency compared to ethyl acetate.
Area of Science:
- Polymer science
- Materials science
- Pharmaceutical technology
Background:
- Praziquantel is a crucial anthelmintic drug.
- Effective drug delivery systems are needed to improve praziquantel bioavailability.
- Poly (D,L-lactide-co-glycolide) (PLGA) is a biocompatible polymer widely used in drug delivery.
Purpose of the Study:
- To develop and characterize praziquantel-loaded PLGA nanoparticles using different organic solvents.
- To investigate the effect of organic solvents on particle size, morphology, and drug entrapment efficiency.
- To study the in vitro release kinetics of praziquantel from the nanoparticles.
Main Methods:
- Nanoparticles were prepared using the emulsion-solvent evaporation method.
- Methylene chloride and ethyl acetate were used as organic solvents for the disperse phase.
- Particle size, morphology, drug entrapment efficiency, and drug-polymer interactions were analyzed.
- Differential Scanning Calorimetry (DSC) and infrared spectroscopy were employed for interaction studies.
- In vitro drug release studies were conducted to determine release kinetics.
Main Results:
- PLGA nanoparticles loaded with praziquantel were successfully prepared.
- Methylene chloride yielded larger nanoparticles with significantly higher entrapment efficiency (79.82%) compared to ethyl acetate (29.27%).
- DSC and infrared studies indicated no significant chemical interaction between praziquantel and PLGA.
- Drug release was influenced by drug loading and particle size, with higher loading and smaller size leading to faster release.
Conclusions:
- The choice of organic solvent significantly impacts the characteristics of praziquantel-loaded PLGA nanoparticles.
- Methylene chloride is a more effective solvent for achieving higher praziquantel entrapment in PLGA nanoparticles.
- Particle size and drug loading are critical factors controlling the release rate of praziquantel from PLGA nanoparticles.
- These findings provide valuable insights for optimizing praziquantel nanoparticle formulations for improved therapeutic efficacy.