Issue 15, 2019

Fluorescent visual quantitation of cell-secreted sialoglycoconjugates by chemoselective recognition and hybridization chain reaction

Abstract

Sialic acid (SA), usually located at the termini of glycan chains, is one of the most important monosaccharide blocks for glycosylation of proteins. The expression level of sialoglycoconjugates (SiaGCs) in cellular secretome is of great significance in diagnosis of tumor malignancy. This work developed a fluorescent visual method for the detection of SiaGCs secreted from living cells by a boronic acid modified chip based chemoselective recognition and hybridization chain reaction. The cell-secreted SiaGCs, which were labeled with the azide group through a metabolic labeling technique during cell culture, were captured by the chip through chemoselective recognition of boronic acid toward SA. After further conjugating the azide group with an alkyne modified DNA probe, the captured SiaGCs could be conveniently endowed with the amplified fluorescent signal through a hybridization chain reaction of a pair of dye-labeled DNA hairpins, which led to a quantitative imaging method for detection of SiaGCs. The average amount of metabolically labeled SiaGCs secreted from a single HeLa cell and MCF-7 cell was 2.18 × 10−17 and 3.98 × 10−17 mol, respectively. The proposed method could be utilized to monitor the variation of the secreted SiaGCs during drug treatment, providing a useful tool for investigating the glycosylation and glycan-related biological processes.

Graphical abstract: Fluorescent visual quantitation of cell-secreted sialoglycoconjugates by chemoselective recognition and hybridization chain reaction

Supplementary files

Article information

Article type
Paper
Submitted
29 ៣ 2019
Accepted
07 ៦ 2019
First published
07 ៦ 2019

Analyst, 2019,144, 4545-4551

Fluorescent visual quantitation of cell-secreted sialoglycoconjugates by chemoselective recognition and hybridization chain reaction

Y. Xiong, Y. Chen, L. Ding, X. Liu and H. Ju, Analyst, 2019, 144, 4545 DOI: 10.1039/C9AN00572B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements