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Rolling circle amplification promoted magneto-controlled photoelectrochemical biosensor for organophosphorus pesticides based on dissolution of core-shell MnO2 nanoflower@CdS mediated by butyrylcholinesterase.
Mikrochim Acta. 2020 07 16; 187(8):450.MA

Abstract

A photoelectrochemical (PEC) aptasensing platform is devised for sensitive detection of an organophosphorus pesticide based on dissolution of core-shell MnO2 nanoflower@CdS (MnO2 NF@CdS) by thiocholine (TCh). TCH is produced from the butyrylcholinesterase-acetylthiocholine system, accompanied by target-triggered rolling circle amplification (RCA). The core-shell MnO2 NF@CdS with excellent PEC performance was synthesized and employed as a photo-sensing platform. The target was detected on a functionalized magnetic probe with the corresponding aptamer. Upon malathion introduction, the aptamer was detached from the magnetic beads, while capture DNA (cDNA, with primer fragment) remained on the beads. The primer fragment in cDNA can trigger the RCA reaction to form a long single-stranded DNA (ssDNA). Furthermore, a large number of butyrylcholinesterase (BChE) were assembled on the long ssDNA strands through the hybridization with the S2-Au-BChE probe. Thereafter, TCh generated from hydrolysis of ATCh by BChE can reduce MnO2 NF (core) to Mn2+ and release the CdS nanoparticles (shell) from the platform electrode, significantly enhancing the PEC signal. Under optimal conditions, the proposed aptasensor exhibited high sensitivity for malathion with a low detection limit of 0.68 pg mL-1. Meanwhile, it also presents outstanding specificity, reproducibility, and stability. Importantly, the sensing platform provides a new concept for detection of pesticide. Graphical abstract Herein, this work devised a photoelectrochemical (PEC) aptasensing platform for sensitive detection of organophosphorus pesticide based on dissolution of core-shell MnO2 nanoflower@CdS (MnO2 NF@CdS) by the as-produced thiocholine (TCh) from the butyrylcholinesterase-acetylthiocholine system, accompanying with the target-triggered rolling circle amplification (RCA).

Authors+Show Affiliations

Ministry of Education Key Laboratory of Functional Small Organic Molecule, Department of Chemistry and chemical engineering, Jiangxi Normal University, Nanchang, 330022, People's Republic of China. tjhere@126.com.Ministry of Education Key Laboratory of Functional Small Organic Molecule, Department of Chemistry and chemical engineering, Jiangxi Normal University, Nanchang, 330022, People's Republic of China.Ministry of Education Key Laboratory of Functional Small Organic Molecule, Department of Chemistry and chemical engineering, Jiangxi Normal University, Nanchang, 330022, People's Republic of China.Ministry of Education Key Laboratory of Functional Small Organic Molecule, Department of Chemistry and chemical engineering, Jiangxi Normal University, Nanchang, 330022, People's Republic of China.Ministry of Education Key Laboratory of Functional Small Organic Molecule, Department of Chemistry and chemical engineering, Jiangxi Normal University, Nanchang, 330022, People's Republic of China.Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, People's Republic of China.Key Laboratory of Analysis and Detection for Food Safety (Ministry of Education of China and Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou, 350108, People's Republic of China.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

32676787

Citation

Tang, Juan, et al. "Rolling Circle Amplification Promoted Magneto-controlled Photoelectrochemical Biosensor for Organophosphorus Pesticides Based On Dissolution of Core-shell MnO2 nanoflower@CdS Mediated By Butyrylcholinesterase." Mikrochimica Acta, vol. 187, no. 8, 2020, p. 450.
Tang J, Li J, Xiong P, et al. Rolling circle amplification promoted magneto-controlled photoelectrochemical biosensor for organophosphorus pesticides based on dissolution of core-shell MnO2 nanoflower@CdS mediated by butyrylcholinesterase. Mikrochim Acta. 2020;187(8):450.
Tang, J., Li, J., Xiong, P., Sun, Y., Zeng, Z., Tian, X., & Tang, D. (2020). Rolling circle amplification promoted magneto-controlled photoelectrochemical biosensor for organophosphorus pesticides based on dissolution of core-shell MnO2 nanoflower@CdS mediated by butyrylcholinesterase. Mikrochimica Acta, 187(8), 450. https://doi.org/10.1007/s00604-020-04434-0
Tang J, et al. Rolling Circle Amplification Promoted Magneto-controlled Photoelectrochemical Biosensor for Organophosphorus Pesticides Based On Dissolution of Core-shell MnO2 nanoflower@CdS Mediated By Butyrylcholinesterase. Mikrochim Acta. 2020 07 16;187(8):450. PubMed PMID: 32676787.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Rolling circle amplification promoted magneto-controlled photoelectrochemical biosensor for organophosphorus pesticides based on dissolution of core-shell MnO2 nanoflower@CdS mediated by butyrylcholinesterase. AU - Tang,Juan, AU - Li,Jingjing, AU - Xiong,Pengyuan, AU - Sun,Yuanfang, AU - Zeng,Zhiyao, AU - Tian,Xiaochun, AU - Tang,Dianping, Y1 - 2020/07/16/ PY - 2020/02/06/received PY - 2020/07/07/accepted PY - 2020/7/18/entrez PY - 2020/7/18/pubmed PY - 2021/6/16/medline KW - Core-shell MnO2 NF@CdS nanostructure KW - Malathion KW - Photoelectrochemical biosensor KW - Rolling circle amplification SP - 450 EP - 450 JF - Mikrochimica acta JO - Mikrochim Acta VL - 187 IS - 8 N2 - A photoelectrochemical (PEC) aptasensing platform is devised for sensitive detection of an organophosphorus pesticide based on dissolution of core-shell MnO2 nanoflower@CdS (MnO2 NF@CdS) by thiocholine (TCh). TCH is produced from the butyrylcholinesterase-acetylthiocholine system, accompanied by target-triggered rolling circle amplification (RCA). The core-shell MnO2 NF@CdS with excellent PEC performance was synthesized and employed as a photo-sensing platform. The target was detected on a functionalized magnetic probe with the corresponding aptamer. Upon malathion introduction, the aptamer was detached from the magnetic beads, while capture DNA (cDNA, with primer fragment) remained on the beads. The primer fragment in cDNA can trigger the RCA reaction to form a long single-stranded DNA (ssDNA). Furthermore, a large number of butyrylcholinesterase (BChE) were assembled on the long ssDNA strands through the hybridization with the S2-Au-BChE probe. Thereafter, TCh generated from hydrolysis of ATCh by BChE can reduce MnO2 NF (core) to Mn2+ and release the CdS nanoparticles (shell) from the platform electrode, significantly enhancing the PEC signal. Under optimal conditions, the proposed aptasensor exhibited high sensitivity for malathion with a low detection limit of 0.68 pg mL-1. Meanwhile, it also presents outstanding specificity, reproducibility, and stability. Importantly, the sensing platform provides a new concept for detection of pesticide. Graphical abstract Herein, this work devised a photoelectrochemical (PEC) aptasensing platform for sensitive detection of organophosphorus pesticide based on dissolution of core-shell MnO2 nanoflower@CdS (MnO2 NF@CdS) by the as-produced thiocholine (TCh) from the butyrylcholinesterase-acetylthiocholine system, accompanying with the target-triggered rolling circle amplification (RCA). SN - 1436-5073 UR - https://www.unboundmedicine.com/medline/citation/32676787/Rolling_circle_amplification_promoted_magneto_controlled_photoelectrochemical_biosensor_for_organophosphorus_pesticides_based_on_dissolution_of_core_shell_MnO2_nanoflower@CdS_mediated_by_butyrylcholinesterase_ DB - PRIME DP - Unbound Medicine ER -