In this study, biodegradable poly(L-lactic acid) (L-PLA) microparticles containing gemcitabine (2,2-difluorodeoxycytidine, dFdC) were prepared by a supercritical process, called aerosol solvent extraction system (ASES). ASES is a method based on solvent extraction using supercritical carbon dioxide for the preparation of microparticles and microspheres. Gemcitabine is an effective antitumor agent in the treatment of several solid tumors. However, it has problems such as short plasma half-life, rapid metabolism, and low selectivity towards tumor tissue. The influence of operating parameters such as temperature, pressure, drug/polymer feed ratio, and polymer molecular weight on the morphology and release characteristics was studied in detail. The drug recovery, entrapment efficiency, and drug release profiles were determined by HPLC assays. The drug recovery was found to be about 70~80%. The entrapment efficiency decreased with increasing temperature and drug/polymer ratio. The ASES-processed gemcitabine-loaded microparticles showed a relatively high initial burst due to the poor affinity between gemcitabine and L-PLA.
키워드
Supercritical fluidGemcitabinePoly(L-lactic aicd)
저자
Hyun-Jae JOO [ Dept. of Chemical and Biochemical Engineering, Suwon University ]
In-Il JUNG [ Dept. of Chemical Engineering, Yonsei University ]
Gio-Bin LIM [ Dept. of Chemical and Biochemical Engineering, Suwon University ]
Jong-Hoon RYU [ Dept. of Chemical and Biochemical Engineering, Suwon University ]
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
이 법인은 생물 공학의 발전과 보급에 이바지하고, 회원 상호 간의 연구 협력과 친목을 도모함을 목적으로 한다
1. 생물공학 분야의 발전을 위한 연구 협력
2. 생물공학의 실용화를 촉진시키기 위한 산학 협동
3. 학술연구 발표회, 강연회, 연수회 등 학술활동의 개최
4. 국,영문 학술지,소식지,학술회의 Proceedings 및 학술도서의 발간
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