光合聚合物点的生物分布和生物毒性评估
Panting Ren1, Jingru Li1, Liqin Xiong1
1Shanghai Med-X Engineering Center for Medical Equipment and Technology, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, P. R. China.
Advanced healthcare materials
|July 9, 2024
概括
脂友性合聚合物点 (Pdots) 在脂肪组织中积累,导致肥胖和功能障碍. 修改后的Pdots显示毒性降低,但水友变种仍然存在风险,强调在生物医学应用中需要谨慎剂量.
科学领域:
- 生物材料科学 生物材料科学
- 纳米医学是一种纳米医学.
- 毒理学 毒理学 毒理学
背景情况:
- 结合聚合物点 (Pdots) 由于其光学特性和可调设计,提供了有前途的生物医学应用.
- 关于Pdot生物毒性的有限研究阻碍了它们的临床转化.
- 脂友性Pdots可以吸附蛋白质,导致特定的组织积累.
研究的目的:
- 在各种生物模型中系统评估脂性光Pdots (Bare-Pdots) 的生物分布和生物毒性.
- 调查Pdot脂性对组织积累和毒性的影响.
- 为了比较Bare-Pdots,COOH-Pdots和NH2-Pdots的安全概况.
主要方法:
- 从MEH-PPV中合成脂友性裸Pdots和使用两性联体的水友性COOH-Pdots/NH2-Pdots.
- 使用干细胞进行体外研究.
- 使用斑马鱼胚胎和小鼠进行体内研究,包括5毫克/公斤剂量的生物分布和毒性评估.
主要成果:
- 裸-Pdots被细胞内化,粘附于胚胎胆管,并积聚在棕色脂肪组织和心脏中.
- 在注射后90天的小鼠中,Bare-Pdot注射导致棕色脂肪组织功能障碍和肥胖风险增加.
- NH2-Pdots的分布类似,但毒性低于Bare-Pdots,而COOH-Pdots导致白细胞减少和脏损伤.
结论:
- Pdot脂性显著影响生物分布和生物毒性.
- 裸足球场存在代谢功能障碍和肥胖的风险.
- 表面修改 (例如NH2-Pdots) 可以减轻Pdot毒性,但仔细的剂量优化对于安全的临床前使用至关重要.
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