Volume 134, Issue 7 e202112031
Forschungsartikel

A Universal Boronate-Affinity Crosslinking-Amplified Dynamic Light Scattering Immunoassay for Point-of-Care Glycoprotein Detection

Jing Chen

Jing Chen

State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Nanchang University, Nanchang, 330047 China

These authors contributed equally to this work.

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Liangwen Hao

Liangwen Hao

State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Nanchang University, Nanchang, 330047 China

These authors contributed equally to this work.

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Jiaqi Hu

Jiaqi Hu

State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Nanchang University, Nanchang, 330047 China

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Kang Zhu

Kang Zhu

State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Nanchang University, Nanchang, 330047 China

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Yu Li

Yu Li

State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Nanchang University, Nanchang, 330047 China

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Sicheng Xiong

Sicheng Xiong

State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Nanchang University, Nanchang, 330047 China

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Prof. Dr. Xiaolin Huang

Corresponding Author

Prof. Dr. Xiaolin Huang

State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Nanchang University, Nanchang, 330047 China

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Prof. Dr. Yonghua Xiong

Corresponding Author

Prof. Dr. Yonghua Xiong

State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Nanchang University, Nanchang, 330047 China

Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang, 330047 China

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Prof. Dr. Ben Zhong Tang

Corresponding Author

Prof. Dr. Ben Zhong Tang

Shenzhen Institute of Aggregate Science and Technology, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong, 518172 China

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First published: 08 December 2021

Abstract

Herein, we report a universal boronate-affinity crosslinking-amplified dynamic light scattering (DLS) immunoassay for point-of-care (POC) glycoprotein detection in complex samples. This enhanced DLS immunoassay consists of two elements, i.e., antibody-coated magnetic nanoparticles (MNP@mAb) for target capture and DLS signal transduction, and phenylboronic acid-based boronate-affinity materials as crosslinking amplifiers. Upon the addition of targets, glycoproteins are first captured by MNP@mAb and amplified by target-induced crosslinking stemming from the selective binding between the boronic acid ligand and cis-diol-containing glycoprotein, thereby resulting in a remarkably increased DLS signal in the average nanoparticle size. Benefiting from the multivalent binding and fast boronate-affinity reaction between glycoproteins and crosslinkers, the proposed immunosensing strategy has achieved the ultrasensitive and rapid quantitative assay of glycoproteins at the fM level within 15 min. Overall, this work provides a promising and versatile design strategy for extending the DLS technique to detect glycoproteins even in the field or at POC.

Conflict of interest

The authors declare no conflict of interest.

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