微流体工程的三重响应氨酸交叉连接的微凝,用于轻度氧化还原触发化学疗法
Marcin Mackiewicz1, Malgorzata Palusinska2, Tomasz S Kaminski1
1Department of Molecular Biology, Institute of Biochemistry, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096, Warsaw, Poland.
Biomaterials advances
|November 29, 2025
概括
使用N,N'-二烯-L-二盐 (DACS) 的新型氧化还原敏感微凝,可为向化疗提供高效,单步的多克索鲁比辛封装. 这些对刺激有反应的药物载体在瘤条件下表现出增强的释放和选择性癌细胞毒性.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术纳米技术
- 药物运输 药物运输 药物运输
背景情况:
- 对刺激有反应的微凝对定位化疗有前途.
- 现有的氧化还原敏感载体通常使用难以溶解的交叉连接剂,并且需要高的细胞内谷氨 (≥10mM) 来释放药物.
- 这限制了它们在瘤微环境中的有效性和适用性.
研究的目的:
- 开发使用水溶性交叉连接剂的新型氧化还原敏感微凝,用于高效的过程中药物封装.
- 在瘤相关条件下研究这些微凝的刺激反应性质和药物释放动力学.
- 评估微凝的体外细胞毒性和治疗潜力,用于局部化疗.
主要方法:
- 聚烯胺) 微凝的合成与N,N '-二烯-L-二盐 (DACS) 通过微流体进行交联.
- 在过程中将多克索鲁比辛 (DOX) 封装成不同尺寸的微凝 (μG100 ≈ 412 μm,μG24 ≈ 82 μm).
- 评估微凝对pH值,离子强度和氧化还原条件 (谷氨) 的反应.
- 在体外细胞毒性测定使用癌细胞 (MCF-7) 和健康细胞 (WJ).
主要成果:
- 在单个步骤中实现了高封装效率 (98%为μG100,87%为μG24).
- 证明了三重反应性:随着pH值的增加而膨胀,随着离子强度的增加而缩小,并在氧化还原条件下降解.
- 在瘤相关的pH 6.5和低谷氨 (100μM) 时表现出增强的多克索鲁比辛释放,在10mMGSH时完全分解网络.
- 对癌细胞具有选择性细胞毒性,对健康细胞的毒性降低,具有大小调节功效和安全性.
- 在pH值7.4.4下,粒子在90天内保持稳定.
结论:
- DACS交叉连接的微凝提供了一个可扩展的,可用水处理的平台,用于对刺激有反应的药物输送.
- 温和的氧化还原触发释放机制和过程中的封装策略对于化疗是有利的.
- 微凝的尺寸调整允许平衡治疗疗效和节省健康细胞.
- 这些微凝代表了局部化疗和其他生物医学应用的多功能系统.
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