期刊
MICROCHIMICA ACTA
卷 188, 期 5, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-021-04808-y
关键词
Peroxidase-like nanozyme; Dopamine; Label-free assay; Self-correcting fluorescence; Tyrosinase inhibitor
资金
- National Natural Science Foundation of China [21765002]
- Natural Science Foundation of Guangxi [AD19110004, 2017GXNSFDA198044]
- BAGUI Scholar Program
An innovative self-correcting fluorescent assay of tyrosinase was developed using Fe-MIL-88B-NH2 as a peroxidase-like nanozyme and capture probe. This method exhibited good sensitivity and selectivity, successfully applied in detecting tyrosinase inhibitors.
A self-correcting fluorescent assay of tyrosinase (TYR) was developed by utilization of Fe-MIL-88B-NH2 as a peroxidase-like nanozyme and a capture probe. Fe-MIL-88B-NH2 nanozyme was selected as an electron donor, and the oxidization product (dopamine-o-quinone) acts as an energy acceptor. First, TYR catalyzes the oxidation of tyramine hydrochloride to dopamine and then to dopamine-o-quinone. Second, Fe-MIL-88B-NH2 with intrinsic peroxidase-like activity decomposes H2O2 to produce .OH radicals, which further accelerate the oxidation of dopamine to dopamine-o-quinone. Excessive H2O2 and .OH radicals reduce the interferences from ascorbic acid at the same time providing a self-correcting ability. Dopamine-o-quinone reacts with -NH2 groups on the ligand of Fe-MIL-88B-NH2 through Michael reaction which results in fluorescence quenching. Under 365-nm excitation, the fluorescence emission intensity at 452 nm gradually decreased with increasing TYR concentration varying from 0 to 10 U mL(-1). The linear range is from 1 to 5 U mL(-1) and the detection limit is 0.05679 U mL(-1). This self-correcting fluorescent assay of tyrosinase exhibits good sensitivity and selectivity which is also successfully applied for tyrosinase inhibitor detection.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据