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Carboplatin sustained delivery system using injectable microspheres
M L Manunta1, E Gavini, G Chessa
1Department of Surgery, School of Veterinary Medicine, University of Sassari, Sassari, Italy. lmanu@uniss.it
Journal of Veterinary Medicine. A, Physiology, Pathology, Clinical Medicine
|September 24, 2005
Summary
Biodegradable polymer microspheres offer a controlled release of carboplatin, showing no local or systemic toxicity in rats. This sustained drug delivery system may aid in treating solid tumors.
Area of Science:
- Biomedical Engineering
- Drug Delivery Systems
- Oncology
Background:
- Biodegradable polymers are increasingly utilized for controlled drug release.
- Carboplatin is a widely used chemotherapy agent for various solid tumors.
- Effective delivery systems are crucial for optimizing carboplatin efficacy and minimizing side effects.
Purpose of the Study:
- To evaluate the local and systemic effects of injectable, biodegradable microspheres containing carboplatin.
- To assess the biocompatibility and toxicity of these microspheres.
- To determine the drug release profile and diffusion of carboplatin in vivo.
Main Methods:
- Development of biodegradable polymer microspheres loaded with carboplatin.
- Subcutaneous injection of microspheres (empty and drug-loaded) into rats.
- Clinical and histological examinations for biocompatibility and toxicity assessment.
- Platinum determination in plasma and tissues over time to evaluate drug release and diffusion.
Main Results:
- The microspheres demonstrated sustained and slow release of carboplatin.
- No evidence of local or systemic toxicity was observed with multiple inoculations.
- The biocompatibility of both empty and carboplatin-loaded microspheres was confirmed.
- Carboplatin diffusion into surrounding tissues was evaluated over time.
Conclusions:
- Injectable biodegradable microspheres provide a promising sustained release system for carboplatin.
- This delivery system exhibits favorable biocompatibility and a lack of toxicity.
- The developed microspheres hold potential for the treatment of solid tumors.