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加多兴奋剂调节CeO2纳米颗粒的类似酶的活性和激素清除特性
Madina M Sozarukova1, Taisiya O Kozlova1, Tatiana S Beshkareva1,2
1Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia.
加多添加的氧化纳米颗粒 (CeO2:Gd NPs) 显示了增强的激素清除作用,但作为亲氧化剂,而不是模仿超氧化物脱酶 (SOD). 然而,它们表现出pH值依赖的过氧化酶类活性.
科学领域:
- 纳米材料科学 科学 纳米材料科学
- 生物化学 生化学
- 热度度学是什么意思 热度学
背景情况:
- 氧化纳米颗粒 (CeO2 NPs) 具有独特的物理化学特性和多酶活性,使其对theranostics具有前景.
- 用加多添加的CeO2NP (CeO2:GdNP) 正在作为具有增强生物催化性能和生物相容性的新型MRI对比剂进行研究.
研究的目的:
- 分析CeO2:Gd NPs对活性氧物种的类似酶的特性和抗氧化活性.
- 调查加多兴奋剂对CeO2NP的仿生学和激素清除能力的影响.
主要方法:
- 合成CeO2:GdNP (~5nm) 使用10%或20%的Gd兴奋剂,使用离子交换方法.
- 使用化学发光和选择性探针 (卢米诺,素,L-012) 评估激素清除和仿生 (SOD和过氧化酶类) 活动.
- 评估pH依赖活性和与天然超氧化物脱酶 (SOD) 的相互作用.
主要成果:
- 加多兴奋剂增强了CeO2NP的激素清除特性.
- 无论是裸体的还是合的CeO2NP都表现出亲氧化行为,产生反应性氧物种,并且缺乏类似SOD的活性.
- CeO2:Gd NPs表现出pH依赖的过氧化酶类活性,在中性条件下充当氧化剂,但在性条件下失去活性.
结论:
- 加多兴奋剂调节了CeO2NP与氧化还原恒温元件的相互作用,增强了激素清除,但增加了亲氧化作用.
- CeO2:Gd NPs不模仿SOD,但具有pH依赖的过氧化酶类活性,限制了它们的纳米酶分类.
- 与SOD的结合赋予了SOD类活性,突出了定制纳米酶设计的潜力.
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