TiC MXene-anchored Photoelectrochemical Detection of Exosomes by Fabrication of CdS Nanoparticles with Enzyme-assisted Hybridization Chain Reaction

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 May 13

PMID 35558841

Authors

Zhenli Qiu

Dechun Fan

Xianghang Xue

Jiayi Zhang

Jiaolin Xu

Haixia Lyu

Yiting Chen

Affiliations

Soon will be listed here.

Abstract

Exosomes that carry large amounts of tumor-specific molecular information have been identified as a potential non-invasive biomarker for early warning of cancer. In this work, we reported an enzyme-assisted photoelectrochemical (PEC) biosensor for quantification of exosomes based on the synthesis of TiC MXene/CdS composites with magnetic separation technology and hybridization chain reaction (HCR). First, exosomes were specifically bound between aptamer-labeled magnetic beads (CD63-MBs) and a cholesterol-labeled DNA anchor. The properly designed anchor ends acted as a trigger to enrich the alkaline phosphatase (ALP) through HCR. It catalyzed more sodium thiophosphate to generate the sulfideion (S), which combined with Cd for fabrication of CdS on TiC MXene resulting in elevated photocurrent. The TiC MXene-anchored PEC method was realized for the quantitative detection of exosomes, which exhibited the dynamic working range from 7.3 × 10 particles per mL to 3.285 × 10 particles per mL with a limit of detection of 7.875 × 10 particles per mL. The strategy showed acceptable stability, high sensitivity, rapid response and excellent selectivity. Furthermore, we believe that the PEC biosensor has huge potential as a routine bioassay method for the precise quantification of exosomes from breast cancer in the future.

Citing Articles

New Horizons for MXenes in Biosensing Applications.

Lu D, Zhao H, Zhang X, Chen Y, Feng L Biosensors (Basel). 2022; 12(10).

PMID: 36290957 PMC: 9599192. DOI: 10.3390/bios12100820.

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