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A novel preparation method for 5-aminosalicylic acid loaded Eudragit S100 nanoparticles
Daode Hu1,2, Liang Liu1, Wenjuan Chen1
1Department of Clinical Pharmacology, Shanghai First People's Hospital, Medical College, Shanghai Jiao Tong University, Shanghai 200080, China.
International Journal of Molecular Sciences
|July 4, 2012
Summary
The Solution Enhanced Dispersion by Supercritical Fluids (SEDS) technique efficiently produced 5-aminosalicylic acid (5-ASA) loaded Eudragit S100 nanoparticles. This method yielded spherical nanoparticles with small sizes and high drug entrapment, without degrading the 5-ASA.
Area of Science:
- Materials Science
- Pharmaceutical Technology
- Chemical Engineering
Background:
- 5-aminosalicylic acid (5-ASA) is a key therapeutic agent for inflammatory bowel disease.
- Eudragit S100 (EU S100) is a pH-sensitive polymer suitable for targeted drug delivery.
- Nanoparticle formulations can enhance the efficacy and delivery of poorly soluble drugs like 5-ASA.
Purpose of the Study:
- To prepare 5-aminosalicylic acid (5-ASA) loaded Eudragit S100 (EU S100) nanoparticles using the Solution Enhanced Dispersion by Supercritical Fluids (SEDS) technique.
- To investigate the impact of critical process parameters on nanoparticle characteristics.
- To characterize the physicochemical properties of the prepared nanoparticles.
Main Methods:
- The Solution Enhanced Dispersion by Supercritical Fluids (SEDS) technique was employed for nanoparticle preparation.
- Process variables such as pressure, temperature, 5-ASA concentration, and solution flow rate were systematically varied.
- Nanoparticle morphology, particle size, drug loading, and entrapment efficiency were analyzed.
- Physicochemical characterization included X-ray diffraction (XRD), Differential Scanning Calorimetry (DSC), and Fourier Transform Infrared Spectroscopy (FTIR).
Main Results:
- Optimized SEDS conditions resulted in spherical 5-ASA/EU S100 nanoparticles with a narrow particle size distribution.
- High drug loading and entrapment efficiency were achieved.
- Characterization confirmed that 5-ASA was embedded in an amorphous state within the EU S100 matrix.
- The SEDS process did not cause degradation of the 5-ASA molecule.
Conclusions:
- The SEDS technique is a viable and effective method for producing amorphous 5-ASA loaded EU S100 nanoparticles.
- The developed nanoparticles exhibit favorable characteristics for potential pharmaceutical applications.
- The amorphous state of 5-ASA within the nanoparticles may enhance its bioavailability.
- The SEDS process offers a non-degradative approach for formulating 5-ASA nanoparticles.
