自交联聚合物纳米凝:一种多功能纳米显微药物递送平台
Ja-Hyoung Ryu1, Reuben T Chacko, Siriporn Jiwpanich
1Department of Chemistry, University of Massachusetts Amherst, Amherst, Massachusetts 01003, USA.
Journal of the American Chemical Society
|November 17, 2010
概括
研究人员开发了稳定的聚合物纳米凝用于药物输送. 交叉连接密度控制药物释放,显示使用纳米车辆的向癌症治疗的希望.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术纳米技术
- 聚合物化学 聚合物化学
背景情况:
- 纳米车辆为增强治疗应用提供有针对性的药物输送,特别是在癌症治疗中.
- 开发具有可调节药物释放动力学的稳定纳米载体对于有效治疗至关重要.
- 聚合物纳米凝为封装和释放治疗剂提供了一个有前途的平台.
研究的目的:
- 合成和表征高度稳定的聚合物纳米凝,用于控制药物封装和释放.
- 调查交叉链密度对纳米凝尺寸和药物释放动态的影响.
- 为了证明这些纳米凝在体外药物输送的潜力,特别是多克索鲁比辛进入乳腺癌细胞.
主要方法:
- 随机合成含有橄乙烯基醇 (OEG) 和二硫化物 (PDS) 单位的共聚物.
- 纳米凝的形成和表征,包括通过前体聚合物变异 (分子量,OEG/PDS比率) 控制尺寸.
- 在体外释放研究中,使用光共振能量转移 (FRET) 与氧化还原触发器 (谷氨,GSH).
- 在实验室内对MCF-7乳腺癌细胞进行多克索鲁比的输送研究.
主要成果:
- 稳定的聚合物纳米凝成功合成了基于前体聚合物组成的调节尺寸.
- 通过调整纳米凝交联密度,药物释放动力学得到了有效控制.
- 在谷 (GSH) 的存在下实现了封装分子的氧反应释放.
- 试验室研究表明,多克索鲁比能有效地传递到MCF-7细胞中,交叉链密度会影响封装稳定性和细胞吸收.
结论:
- 聚合物纳米凝为药物输送应用提供了稳定和可调节的平台.
- 交联密度是控制药物封装,释放动力学和细胞吸收的关键参数.
- 这些纳米凝显示出针对性癌症治疗的巨大潜力,特别是对于疏水性药物.
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