生物医学应用TiO2NP可以通过触发血栓凝固活性,激活和血小板聚合引起动脉血栓风险
Yiying Bian1,2,3,4, Qiushuo Jin5,6,7, Jinrui He5,6,7
1Key Laboratory of Environmental Stress and Chronic Disease Control & Prevention Ministry of Education, China Medical University, Shenyang, China. yybian@cmu.edu.cn.
Cell biology and toxicology
|August 7, 2024
概括
二氧化纳米颗粒 (TiO2NPs) 通过激活人类血小板并降低小鼠血小板数量,增加动脉血栓形成 (AT) 风险. 这种依赖的机制凸显了与TiO2NP暴露相关的低估的健康风险.
科学领域:
- 纳米技术纳米技术
- 生物医学工程 生物医学工程
- 毒理学 毒理学 毒理学
背景情况:
- 二氧化纳米颗粒 (TiO2NPs) 在医疗应用中很普遍.
- 健康风险,特别是关于动脉血栓 (AT) 的风险,仍然不完全理解.
研究的目的:
- 调查TiO2NPs对血小板功能和AT敏感性的影响.
- 阐明TiO2NP诱导的血小板激活和聚合背后的机制.
主要方法:
- 使用新鲜分离的人类血小板 (hPLTs) 和体内小鼠模型.
- 评估了血小板前凝剂活性,脂暴露,微粒细胞生成,糖蛋白水平和细胞内.
- 在各种生理条件和体内血栓形成模型下评估了血小板聚合.
主要成果:
- 在hPLT中,TiO2NP治疗诱导了前凝性活性,脂素暴露,以及微囊生成.
- 糖蛋白IIb/IIIa和P-选择素水平升高,导致血小板聚合增强,特别是在模拟生理条件下.
- TiO2NP暴露导致细胞内水平升高,这对血小板激活和聚合至关重要.
- 在体内,TiO2NPs降低了血小板数量,破坏了血液流动,并加剧了动脉血栓形成.
结论:
- 暴露于TiO2NP会通过依赖的途径增加血小板前凝活性,激活和聚合.
- 这种机制增加了动脉血栓形成的风险,突出了与TiO2NPs相关的重大,以前被忽视的健康问题.
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