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Updated: Jan 17, 2026

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具有短PAS序列的表面功能化影响H-费里丁纳米稳定性.

Ilaria Tagliolini1, Francesca Gorgoglione1, Marta Sevieri1

  • 1Dipartimento di Scienze Biomediche e Cliniche, Università degli studi di Milano, 20157, Milano, Italy.

International journal of biological macromolecules
|September 21, 2025
PubMed
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使用较短域的PASylation,比如20个氨基酸,会使H-费里丁纳米 (HFn) 不稳定. 这影响了HFn的稳定性和组装,这对于它们的瘤向传递应用至关重要.

科学领域:

  • 生物化学 生物化学
  • 纳米技术纳米技术
  • 结构生物学 结构生物学

背景情况:

  • H-费里丁纳米 (HFn) 是有效的瘤向输送系统.
  • 临床使用受到HFn短半衰期和快速清除的限制.
  • PASylation 延长了 HFn 半衰期,但较短的 PAS 域的影响尚不清楚.

研究的目的:

  • 研究较短的PAS域对HFn稳定性的影响.
  • 分析20个氨基酸PAS域 (PAS20-HFn) 修改的HFn的结构动态.

主要方法:

  • PAS20-HFn单体的生产和净化.
  • 原生HFn,PAS20-HFn和PAS40-HFn复合物的结构动力学模拟 (二次体,四次体,八次体).

主要成果:

  • 产生了PAS20-HFn单体,但未能形成稳定的四级结构.
  • 模拟显示,在特定螺旋区域内,PAS20-HFn四度体的灵活性增加.
  • 在PAS20-HFn八度体中,PASylation破坏了适当的C端螺旋结合,导致纳米的不稳定性.

结论:

  • 较短的PAS域 (20个氨基酸) 会对HFn的稳定性和组装产生负面影响.
关键词:
在H-ferritin纳米中.纳米药物输送系统提供系统.通过PASylation进行化.

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  • PASylation长度对于保持HFn纳米的完整性和功能至关重要.
  • 这些发现凸显了PAS域长对于基于HFn的交付系统的重要性.