通过控制基于其表面氨酸密度的变化来控制细胞吸收,对聚合物微粒进行热响应准
Sota Yamada1, Eita Sasaki1, Hisashi Ohno1
1Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo, Japan.
Communications chemistry
|November 4, 2025
概括
研究人员开发出热响应性菌丝,在轻度加热时增强细胞透. 这种受控的药物输送系统显示出通过外部热量激活的向治疗的潜力.
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:
- 响应刺激的纳米载体对于有针对性的药物输送至关重要.
- 细胞透 (CPP) 的活性取决于氨酸残留的密度.
研究的目的:
- 开发一种热响应的纳米载体,具有可控制的CPP活性,用于向药物输送.
- 为了设计具有可调节的氨酸密度的微粒,以实现温度触发的细胞吸收.
主要方法:
- 构造的聚合物微粒具有热响应的N-异烯胺外和低氨酸密度 (Arg-TRM).
- 在生理 (37°C) 和高 (42°C) 温度下研究细胞内化.
- 评估了CPP活动切换和加热后细胞内吸收增强的动力学.
- 在小鼠模型中使用局部热量过高来证明体内准.
主要成果:
- 在37°C时,Arg-TRM显示细胞吸收最小,类似于对照小粒.
- 在加热到42°C时,状的收缩增加了表面的氨酸密度,激活了CPP活性.
- 在加热几分钟内观察到有效的细胞吸收,证明了快速反应.
- 暂时加热允许可逆控制增强的细胞吸收.
- 在体内研究表明,Arg-TRM在小鼠局部加热的耳朵中有效积累.
结论:
- Arg-TRM纳米载体表现出热响应,按需的CPP活动.
- 轻微的外部加热可以可控地增强纳米载体的细胞吸收.
- 这些发现表明Arg-TRM是局部,外部触发药物递送的有希望的平台.
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