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The Use of Near-Infrared Light-Emitting Fluorescent Nanodiamond Particles to Detect Ebola Virus Glycoprotein: Technology Development and Proof of Principle

Authors Feuerstein GZ, Mansfield MA, Lelkes PI, Alesci S, Marcinkiewicz C, Butlin N, Sternberg M

Received 9 May 2020

Accepted for publication 10 August 2020

Published 7 October 2020 Volume 2020:15 Pages 7583—7599


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Prof. Dr. Anderson Oliveira Lobo

Giora Z Feuerstein,1 Michael A Mansfield,2 Peter I Lelkes,3 Salvatore Alesci,1 Cezary Marcinkiewicz,1,3 Nathan Butlin,4 Mark Sternberg1

1Debina Diagnostics Inc., Newtown Square, PA, USA; 2MilliporeSigma, Bedford, MA, USA; 3Department of Bioengineering, Temple University, Philadelphia, PA, USA; 4Axxin Pty Ltd, Fairfield, VIC, Australia

Correspondence: Giora Z Feuerstein
Debina Diagnostics Inc., Newtown Square, PA, USA
Tel +1 4842221575

Background: There is a dire need for rapid diagnostic tests of high sensitivity, efficiency, and point-of-test reporting capability to mitigate lethal viral epidemic outbreaks.
Purpose: To develop a new operating system within the lateral flow assay (LFA) format for Ebola virus (EBOV), based on fluorescent nanodiamond particles (FNDP) nitrogen vacancy (NV) emitting near-infrared (NIR) light. Specifically, we aimed to detail technical issues and the feasibility of mobilizing FNDP-NV on nitrocellulose membranes (NCM) and capturing them at test and control lines.
Methods: FNDP-NV-200nm, 400nm or 800nm were linked to anti-EBOV glycoprotein (GP) monoclonal antibodies (mAb) and tested for LFA performance by monitoring NIR emissions using an in vivo imaging system or optoelectronic device (OED). Anti-EBOV recombinant glycoprotein (GP) humanized mAb c13C6 was linked to FNDP-NV-200nm for the mobile phase; and a second anti-GP mouse mAb, 6D8, was printed on NCM at the test line. Goat anti-human IgG (GAH-IgG) served as a nonspecific antibody for conjugated FNDP-NV-200nm at the control line.
Results: FNDP-NV-200nm-c13C6 specifically and dose-dependently bound to recombinant EBOV GP in vitro and was effectively captured in a sandwich configuration at the test line by mAb 6D8. FNDP-NV-200nm-c13C6 was captured on the control line by GAH-IgG. The OED quantitative analysis of NIR (obtained in less than 1 minute) was further validated by an in vivo imaging system.
Conclusion: FNDP-NV-200nm performance as a reporter for EBOV GP rapid diagnostic tests suggests an opportunity to replace contemporary visual tests for EBOV GP and other highly lethal viral pathogens. Mobile, battery-operated OED adds portability, quantitative data, rapid data collection, and point-of-test reporting capability. Further development of FNDP-NV-200nm within a LFA format is justified.

Keywords: Ebola virus, diagnostic lateral flow test, LFA, opto-electronic reader, OER, anti-EBOV antibodies, nitrocellulose membranes, fluidics technology

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