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选择性电化学生物传感器通过酶介导氧化反应对氨酸酶和氨酸进行检测
Islam M Mostafa1,2, Abubakar Abdussalam1,3, Hao Jiang1
1State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, PR China.
Analytical chemistry
|March 6, 2025
概括
这项研究引入了一种新的电化学方法,用于检测铁酶和铁胺. 生物传感器在真实世界样本 (如血清和酸奶) 中实现了敏感和选择性检测.
科学领域:
- 生物化学 生化学
- 分析化学 分析化学
- 生物传感器技术技术
背景情况:
- 铁酶是一种含铜的氧化酶,对颜色的颜色和皮肤疾病如白风和黑色素瘤的生物标志物至关重要.
- 铁酶催化了胺的氧化,这是多巴胺等神经递质的前体,影响神经系统的过程.
- 现有的胺和氨酸酶检测方法通常依赖于色度或度测定.
研究的目的:
- 开发和优化一种电化学检测方法,用于未经电极修改的铁酶和铁胺.
- 为了利用氨酸酶对氨酸的酶性氧化,将其转化为多巴胺,用于选择性生物感知.
- 评估开发的电化学生物传感器在真实样本中的分析性能和适用性.
主要方法:
- 利用铁酶和铁氨酸之间的酶反应产生多巴胺.
- 采用循环电压测量 (CV) 和正方波电压测量 (SWV) 来进行电化学检测.
- 开发了一种无电极修改的方法,用于直接检测.
主要成果:
- 通过在位多巴胺检测实现了对铁酶和胺的选择性检测.
- CV 显示了线性范围的0.7-10 微克/毫升 铁酶和5.0-100 微米 铁胺.
- SWV提供了增强的灵敏度,检测范围为0.3-10微克/毫升 (LOD 0.29微克/毫升) 的铁酶和1.0-100微米 (LOD 0.69微米) 的胺.
- 在人血清中成功检测到铁酶,在酸奶和尿液样本中检测到铁胺.
结论:
- 开发的电化学生物传感器提供了一种简单,方便和有效的方法来检测氨酸酶和氨酸.
- 高灵敏度和选择性使这些生物传感器在诊断和食品分析中的实际应用具有前景.
- 无电极修改的设计简化了测试程序,并扩大了潜在的应用.
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