聚合物增强过氧化酶活性的ceria纳米酶的高灵敏度检测的性酸酶
Qian Wang1, Song Meng2, Gang Zhou1
1Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, People's Republic of China.
Analytical and bioanalytical chemistry
|May 4, 2024
概括
聚合物封装的氧化纳米颗粒 (纳米) 显示出增强的类似酶的催化活性,用于检测生物标记物. 用PAA覆盖的纳米纤维表现出卓越的性能和稳定性,用于诊断生物疾病.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术纳米技术
- 分析化学 分析化学
背景情况:
- 氧化纳米粒子 (nanoceria) 模仿自然酶,显示出检测性酸酶 (ALP) 的潜力,这是各种疾病的生物标志物.
- 纳米纤维的实际应用受到与表面化学相关的生理稳定性差和蛋白质冠状形成的阻碍.
- 表面修饰对于提高纳米材料在生物环境中的催化效率和稳定性至关重要.
研究的目的:
- 用聚合物合成和功能化氧化纳米粒子 (CeO2),以增强它们的催化活性和生理稳定性.
- 研究聚合物封装对CeO2纳米颗粒表面化学和催化性能的影响.
- 评估聚合物覆盖的CeO2纳米颗粒对酸酸酶等生物标志物的敏感色度检测的潜力.
主要方法:
- 合成CeO2纳米颗粒的控制尺寸和高表面积.
- 用各种聚合物封装CeO2纳米颗粒,包括聚烯酸 (PAA).
- 表面化学特性 (例如表面电荷) 和对模拟生物条件下的催化活性和稳定性的评估.
主要成果:
- 聚合物封装显著改善了CeO2纳米颗粒的催化活性和生理稳定性.
- 用PAA覆盖的CeO2 (PAA-CeO2) 具有最高的催化性能,这归因于表面负电荷的增加.
- PAA-CeO2 显示出对酸 (AA) 和性酸酶 (ALP) 的敏感定量检测,检测极限低 (0.111 μM 对于 AA,0.12 U/L 对于 ALP).
结论:
- PAA-CeO2纳米粒子为生物标志物检测提供了增强的催化性能和稳定性.
- 开发的PAA-CeO2系统可在人血清中提供灵敏可靠的ALP检测,适合临床诊断.
- 通过聚合物封装进行表面修饰是一种有效的策略,用于改善生物医学应用中纳米纤维的性能.
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