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温度敏感的PLGA-PEG-PLGA水凝胶的合成、 表征和药物释放

林浩1,2; 田华雨1,2; 孙敬茹1,2; 庄秀丽1,2; 陈学思1; 李悦生1; 景遐斌1   

  1. 1. 中国科学院长春应用化学研究所, 高分子物理与化学国家重点实验室, 长春 130022;
    2. 中国科学院研究生院, 北京 100039
  • 收稿日期:2005-10-19 修回日期:1900-01-01 出版日期:2006-07-10 发布日期:2006-07-10
  • 通讯作者: 陈学思

Synthesis, Characterization and Drug Release of Temperature-sensitive PLGA-PEG-PLGA Hydrogel

LIN Hao1,2; TIAN Hua-Yu1,2; SUN Jing-Ru1,2; ZHUANG Xiu-Li1,2; CHEN Xue-Si1*; LI Yue-Sheng1; JING Xia-Bin1

  

  1. 1. State Key Laboratory of Polymer Chemistry and Physics, Changchun
    Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun
    130022, China;
    2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2005-10-19 Revised:1900-01-01 Online:2006-07-10 Published:2006-07-10
  • Contact: CHEN Xue-Si

摘要: 用聚乙二醇PEG1000和4600引发乙交酯(GA)和L-丙交酯(L-LA)开环共聚合得到一系列数均分子量为3000~7000的PLGA-PEG-PLGA水凝胶材料. 综合应用动态粘弹谱仪和相图, 系统报道了该凝胶力学性质和溶胶-凝胶转变的关系, 凝胶区间的模量在102~104 Pa之间. 用荧光光谱证明了该三嵌段聚合物形成胶束的性质并测定了临界胶束浓度, 验证了凝胶由胶束形成的机理. 凝胶中的头孢他定释放呈现一定程度的缓释作用.

关键词: 聚乙二醇, 乙交酯-丙交酯共聚物, 水凝胶, 温度敏感, 力学性质, 药物释放

Abstract: A series of PLGA-PEG-PLGAs with Mn=3000—7000 were synthesized by ROP of L-lactide and glycolide with PEG(Mw=1000 and 4600) as the initiators. The dynamic viscoanalyser and phase diagram were utilized to investigate the mechanical properties with sol-gel transition of the hydrogel system, and the G' and G″were between 102 and 104 Pa. Also, the fluorescence spectroscopy of PLGA-PEG-PLGA micelle solution was investigated to reveal the gelation mechanism of hydrogel. Finally, the controlled release of ceftazidime from the hydrogel was observed.

Key words: PEG, PLGA, Hydrogel, Temperature-sensitivity, Mechanical property, Drug release

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