Thermosensitive polymers with a lower critical solution temperature (LCST) near or below body temperature are of great interest for biomedical applications such as local drug delivery and body temperature sensitive drug release1. The advantages of thermosensitive polymers for drug delivery materials have been explained in terms of local delivery and controlled release of drugs2. We have studied biodegradable thermosensitive poly(organophosphazenes) bearing α-amino-ω- methyl-poly(ethylene glycol) (AMPEG), some hydrophobic amino acid esters, and a depsipeptide ethyl ester (ethyl-2-(O-glycyl)glycolate) as a hydrolysis sensitive moiety have been synthesized. Most of the poly(organophosphazenes) synthesized showed sol-gel transition properties in an aqueous solution. The aqueous solutions of the present polymers were injected subcutaneously into rats, which resulted in immediate gelation. The biocompatibility testing of the polymers has showed the minimum or mild tissue reaction in rats. The anticancer agent, doxorubicin, loaded easily in the polymers at low temperature was released over a month from the polymer gels in a controlled rate. These gels will be expected to be useful for local delivery of protein and anticancer drugs. In this study, we discuss thermosensitive properties and application of these poly(organophosphazenes) as drug carriers.
저자
Soo-Chang Song [ Division of Life Science, Korea Institute of Science and Technology Seoul 130-650, Korea ]
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
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