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Sequential-release of anticancer drugs microcapsulated with ethylcellulose
Genghua Gu1, Jianqi Huang, Hong He
1Department of Oral and Maxillofacial Surgery, the Second Affiliated Hospital, Zhejiang University, Hangzhou 310009, China.
Chinese Medical Journal
|March 1, 2003
Summary
Sequential release of antitumor drugs Adriamycin (ADM) and carboplatin (CBP) was achieved using ethylcellulose microcapsules. This approach enhances chemotherapy effectiveness by controlling drug release rates.
Area of Science:
- Biomedical Engineering
- Materials Science
- Oncology
Background:
- Chemotherapy effectiveness can be limited by drug release kinetics.
- Sequential drug delivery systems offer potential to improve therapeutic outcomes.
Purpose of the Study:
- To develop microcapsules for sequential release of Adriamycin (ADM) and carboplatin (CBP).
- To evaluate the impact of microencapsulation on drug stability and antitumor activity.
- To promote the efficacy of chemotherapy through controlled drug release.
Main Methods:
- ADM and CBP were microencapsulated using ethylcellulose via organic phase separation.
- Microcapsule morphology and size were analyzed using light and scanning electron microscopy.
- Drug content and in vitro release rates were quantified using spectrophotometry.
- Antitumor activity was assessed via MTT assay.
Main Results:
- Spherical microcapsules of ADM and CBP were successfully fabricated with mean diameters of 196 ± 64 µm and 214 ± 48 µm, respectively.
- In vitro release rates varied based on microcapsule composition and thickness.
- The microencapsulation process did not compromise the stability or antitumor activity of ADM and CBP.
Conclusions:
- Microcapsule properties, including drug content and material thickness, influence drug release rates.
- Combined arterial chemoembolization with tailored microcapsules enables sequential drug release.
- This strategy holds promise for enhancing chemotherapy efficacy.