Visual detection of hepatocellular carcinoma cells with cell imprinted substrate and pH-sensitive allochroic-graphene oxide.

Abstract

Herein, we integrate cell-imprinted substrate (CIS) and allochroic-graphene oxide (AGO) for specific visualization sorting of hepatocellular carcinoma cells. The state-of-the-art-of detection method relies on the enzyme linked immunosorbent assay (ELISA)-like sandwich strategy with hierarchical recognition. The target tumor cells are first selectively captured by the CIS based on cell imprinted recognition, and then specifically labeled with AGO by boronate affinity recognition between boronic acid on AGO and cis-diols on the surface of target cells. The selectively recognition of CIS for target template cells is verified by cell function experiments. It is also worth mentioning that the AGO can specifically recognize target tumor cells under physiological pH, and then perform signal amplification and output through pH-triggered allochroism. The CIS linked AGO for cell assay (CIS-AGO-CA) is successfully used for visualization detection of human hepatocarcinoma HLE cells from hepatocyte suspension. When the hepatocyte suspension is spiked with 1.0 × 105 cells, the recoveries of CIS-AGO-CA are 80.67 ± 4.33% for target HLE cells, and only 12.00 ± 1.00% for non-target Hep3B cells. It is worth emphasizing that the CIS-AGO-CA process is antibody-free. Therefore, this novel ELISA-like sandwich strategy is high specificity, cost-efficient and easy-to-use, and exhibits great prospect in the visualization sorting of tumor subpopulation.

• Authors: Lu Sun, Chao Peng, Yi Luo, Liwei Chen, Ziye Chen, Manyu Xiao, Rui Duan, Lin-Yi Dong, Hua Guo, Xian-Hua Wang
• Journal: Materials science & engineering. C, Materials for biological applications (Mater Sci Eng C Mater Biol Appl) Vol. 123 Pg. 111966 (Apr 2021) ISSN: 1873-0191 [Electronic] Netherlands
• PMID: 33812594 (Publication Type: Journal Article)
• Copyright: Copyright © 2021 Elsevier B.V. All rights reserved.

Chemical References

• graphene oxide
• Graphite

Topics

• Carcinoma, Hepatocellular
• Graphite
• Humans
• Hydrogen-Ion Concentration
• Liver Neoplasms
• Molecular Imprinting