聚合多巴胺涂层血红蛋白基氧载体的综合生物物理和生物化学特征
Tanmay Salvi1, Mohd Asim Khan1, Griffin J Beyer1
1William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, United States of America.
International journal of biological macromolecules
|August 8, 2025
概括
聚合多巴胺涂层增强了基于血红蛋白的氧载体 (HBOCs) 的抗氧化特性,减少了潜在的血液替代品的氧化应激. 新方法提高了稳定性,减少了有害的副产品.
科学领域:
- 生物材料科学 生物材料科学
- 生物化学 生物化学
- 纳米技术 纳米技术
背景情况:
- 基于血红蛋白 (Hb) 的氧气载体 (HBOC) 是潜在的红细胞 (RBC) 替代品.
- HBOCs可以产生活性氧物种 (ROS),导致氧化应激和细胞损伤.
- 聚合多巴胺 (PDA) 涂层具有抗氧化特性,可以减轻 HBOC 诱导的氧化应激.
研究的目的:
- 测量PDA涂层的人类Hb (PDA-hHb) 的生物物理特性.
- 为HBOCs引入和评估两种新的PDA涂层方法.
- 评估新的PDA-hHb变体的抗氧化能力和氧化稳定性.
主要方法:
- 为人类Hb (hHb) 开发了两种新的PDA涂层策略:涂层前的CO结合 (PDA-hHb-13) 和涂层HbCO载荷纳米粒子 (PDA-hHb-15).
- 量化的甲血球蛋白 (metHb) 水平,自氧化速率和氧气卸载动力学.
- 评估了铁素的降解活性,激素清除能力和铁素物种的形成.
主要成果:
- 与PDA-hHb-1 (~13%) 相比,PDA-hHb-13和PDA-hHb-15的metHb水平显著降低 (<10%),而PDA-hHb-1的水平则明显降低 (~13%).
- 与PDA-hHb-13相比,PDA-hHb-15表现出较低的自氧化率.
- 涂有PDA的变种表现出增强的抗氧化活性,但增加了ferryl物种的形成,这表明降低了catalase活性.
结论:
- 有PDA涂层的Hb变体显示出作为具有改善抗氧化特性的HBOC有前途.
- 新的涂层方法提高了HBOC的稳定性,减少了metHb的形成.
- 需要进一步优化,以平衡临床应用中的稳定性和氧化弹性.
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