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Enzymatic cleavage of specific dipeptide conjugated with ferrocene as a flexible ultra-sensitive and fast voltammetric assay of matrix metalloproteinase-9 considered a prognostic cancer biomarker in plasma samples.用铁氰化物偶联的特定二肽的酶切作为一种灵活的超灵敏和快速伏安测定法,用于检测基质金属蛋白酶-9,该酶被认为是血浆样本中一种有预后价值的癌症生物标志物。
Biosens Bioelectron. 2022 Jan 1;195:113653. doi: 10.1016/j.bios.2021.113653. Epub 2021 Sep 20.
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Quantitative Detection of Cathepsin B Activity in Neutral pH Buffers Using Gold Microelectrode Arrays: Toward Direct Multiplex Analyses of Extracellular Proteases in Human Serum.使用金微电极阵列在中性 pH 缓冲液中定量检测组织蛋白酶 B 活性:实现人血清中细胞外蛋白酶的直接多重分析。
ACS Sens. 2021 Oct 22;6(10):3621-3631. doi: 10.1021/acssensors.1c01175. Epub 2021 Sep 21.
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Repurposing an Antiviral Drug against SARS-CoV-2 Main Protease.抗 SARS-CoV-2 主蛋白酶的抗病毒药物再利用。
Angew Chem Int Ed Engl. 2021 Oct 25;60(44):23492-23494. doi: 10.1002/anie.202107481. Epub 2021 Sep 21.
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用于检测新型冠状病毒主要蛋白酶及其抑制剂依布硒啉的电化学生物传感器

Electrochemical Biosensor for the Detection of SARS-CoV-2 Main Protease and Its Inhibitor Ebselen.

作者信息

Zhang Qiongyu, Liu Gang, Ou Lingbin

机构信息

School of Fundamental Sciences, Yongzhou Vocational Technical College, Yongzhou 425100, Hunan, People's Republic of China.

College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, Henan, People's Republic of China.

出版信息

Int J Electrochem Sci. 2022 Apr;17(4):220421. doi: 10.20964/2022.04.19. Epub 2023 Jun 17.

DOI:10.20964/2022.04.19
PMID:37359208
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10276345/
Abstract

This work reported an electrochemical method for the detection of SARS-CoV-2 major protease (Mpro). Specifically, ferrocene (Fc)-labeled peptide substrates were immobilized on the gold nanoparticles (AuNPs)-modified electrode. Cleavage of the peptides by Mpro led to the release of Fc tags and the decrease of the electrochemical signals. The analytical performance of the biosensor for analysis of Mpro was investigated. Inhibiting the activity of Mpro prevented the cleavage of the peptide substrates. The method was successfully used to evaluate the inhibition efficiency of a well-known inhibitor.

摘要

这项工作报道了一种检测新型冠状病毒主要蛋白酶(Mpro)的电化学方法。具体而言,将二茂铁(Fc)标记的肽底物固定在金纳米颗粒(AuNPs)修饰的电极上。Mpro对肽的切割导致Fc标签的释放和电化学信号的降低。研究了该生物传感器分析Mpro的分析性能。抑制Mpro的活性可防止肽底物的切割。该方法成功用于评估一种知名抑制剂的抑制效率。