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Biosci Biotechnol Biochem. 2017 Oct;81(10):1874-1882. doi: 10.1080/09168451.2017.1365590. Epub 2017 Aug 25.

A novel multi-walled carbon nanotube-based antibody conjugate for quantitative and semi-quantitative lateral flow assays.

Sun W1,2, Hu X3, Liu J1,2, Zhang Y3, Lu J1, Zeng L3.

Author information

1
a School of Pharmacy , Fudan University , Shanghai , China.
2
b State Key Laboratory of New Drug and Pharmaceutical Process , Shanghai Institute of Pharmaceutical Industry , Shanghai , China.
3
c Shanghai Key Laboratory of Crime Scene Evidence , Shanghai Institute of Forensic Science , Shanghai , China.

Abstract

In this study, the multi-walled carbon nanotubes (MWCNTs) were applied in lateral flow strips (LFS) for semi-quantitative and quantitative assays. Firstly, the solubility of MWCNTs was improved using various surfactants to enhance their biocompatibility for practical application. The dispersed MWCNTs were conjugated with the methamphetamine (MET) antibody in a non-covalent manner and then manufactured into the LFS for the quantitative detection of MET. The MWCNTs-based lateral flow assay (MWCNTs-LFA) exhibited an excellent linear relationship between the values of test line and MET when its concentration ranges from 62.5 to 1500 ng/mL. The sensitivity of the LFS was evaluated by conjugating MWCNTs with HCG antibody and the MWCNTs conjugated method is 10 times more sensitive than the one conjugated with classical colloidal gold nanoparticles. Taken together, our data demonstrate that MWCNTs-LFA is a more sensitive and reliable assay for semi-quantitative and quantitative detection which can be used in forensic analysis.

KEYWORDS:

MWCNTs; biocompatibility; lateral flow strips; semi-quantitative lateral flow assays

PMID:
28840780
DOI:
10.1080/09168451.2017.1365590
[Indexed for MEDLINE]

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