Back to Search Start Over

Novel Field-Based Protein Detection Method Using Light Transmission Spectroscopy and Antibody Functionalized Gold Nanoparticles.

Authors :
Brandão-Dias PFP
Deatsch AE
Tank JL
Shogren AJ
Rosi EJ
Ruggiero ST
Tanner CE
Egan SP
Source :
Nano letters [Nano Lett] 2022 Apr 13; Vol. 22 (7), pp. 2611-2617. Date of Electronic Publication: 2022 Apr 01.
Publication Year :
2022

Abstract

Protein detection is a universal tool critical to many applications in medicine, agriculture, and biotechnology. We developed a novel protein detection method combining light transmission spectroscopy and particle-size analysis of gold nanospheres monovalently functionalized with polyclonal antibodies and applied it to an emerging challenge for such technologies─the monitoring of environmental proteins (eProteins) present in natural aquatic systems. These are an underreported source of pollution and include the pseudopersistent Cry toxins that enter aquatic ecosystems from surrounding genetically engineered crops. The assay is capable of detecting proteins in complex matrices, such as water samples collected in the field, making it a competitive assay for eProtein detection. It is sensitive, reaching 1.25 ng mL <superscript>-1</superscript> , and we demonstrate its application to the detection of Cry1Ab from subsurface tile-drain and streamwater samples from agricultural waterways. The assay can also be quickly adapted for other protein detection applications in the future.

Details

Language :
English
ISSN :
1530-6992
Volume :
22
Issue :
7
Database :
MEDLINE
Journal :
Nano letters
Publication Type :
Academic Journal
Accession number :
35362986
Full Text :
https://doi.org/10.1021/acs.nanolett.1c04142