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用含酸的聚合物刷修改的双响应表面可逆捕获和释放癌细胞
Hongliang Liu1, Yingying Li, Kang Sun
1Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
Journal of the American Chemical Society
|April 23, 2013
概括
科学家们使用pH和葡萄糖创造了一种新的双响应表面,以捕获和释放癌细胞. 这种智能表面为生物医学应用提供了一种具有高细胞活力的非侵入性方法.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术 纳米技术
- 表面化学 表面化学
背景情况:
- 模仿生物系统需要对多种刺激做出反应的人工表面.
- 现有的人工系统在双重或多重刺激响应方面扎.
- 开发先进的响应表面对于动态生物应用至关重要.
研究的目的:
- 为了合成一种新的pH和葡萄糖双反应表面.
- 为了使目标癌细胞的可逆捕获和释放.
- 调查双响应行为的 AND 逻辑.
主要方法:
- 在对齐的纳米线 (SiNW) 阵列上植入聚烯胺烯酸 (polyAAPBA) 刷子.
- 使用石英晶体微平衡来研究响应机制.
- 在不同的pH值和葡萄糖度下测试细胞捕获和释放.
主要成果:
- 表面显示可逆的细胞捕获和释放受pH和葡萄糖水平控制.
- 6.8-7.8的pH范围和70mM的葡萄糖度调节了细胞粘附.
- 该系统表现出非侵入性细胞操纵,细胞活力超过95%,反应速度快.
结论:
- 开发的多AAPBA-移植的SiNW表面作为一个双响应平台,用于向细胞操纵.
- 聚AAPBA和酸/葡萄糖之间的竞争性结合驱动了双重反应.
- 这项技术在基于细胞的诊断和体内药物输送方面具有重大潜力.
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