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Capture and selective release of multiple types of circulating tumor cells using smart DNAzyme probes

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Abstract

The effective capture, release and reanalysis of circulating tumor cells (CTCs) are of great significance to acquire tumor information and promote the progress of tumor therapy. Particularly, the selective release of multiple types of CTCs is critical to further study; however, it is still a great challenge. To meet this challenge, we designed a smart DNAzyme probe-based platform. By combining multiple targeting aptamers and multiple metal ion responsive DNAzymes, efficient capture and selective release of multiple types CTCs were realized. Sgc8c aptamer integrated Cu2+-dependent DNAzyme and TD05 aptamer integrated Mg2+-dependent DNAzyme can capture CCRF-CEM cells and Ramos cells respectively on the substrate. With the addition of Cu2+ or Mg2+, CCRF-CEM cells or Ramos cells will be released from the substrate with specific selectivity. Furthermore, our platform has been successfully demonstrated in the whole blood sample. Therefore, our capture/release platform will benefit research on the molecular analysis of CTCs after release and has great potential for cancer diagnosis and individualized treatment.

Graphical abstract: Capture and selective release of multiple types of circulating tumor cells using smart DNAzyme probes

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Supplementary files

Article information


Submitted
27 Aug 2019
Accepted
06 Jan 2020
First published
09 Jan 2020

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2020, Advance Article
Article type
Edge Article

Capture and selective release of multiple types of circulating tumor cells using smart DNAzyme probes

Q. Zhang, W. Wang, S. Huang, S. Yu, T. Tan, J. Zhang and J. Zhu, Chem. Sci., 2020, Advance Article , DOI: 10.1039/C9SC04309H

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