Bioreporter Assay: A Sensitive Technique using a Bioluminescent Reporter System to Detect SARS-CoV-2 Antibodies

0 weergaven3:11 min • July 8th, 2025

Loading...
$$\rightleftharpoonup{xx}$$ $$\longleftharp{xx}$$, $$\longrightharp{xx}$$,

During severe acute respiratory syndrome coronavirus 2, or SARS-CoV-2, infection, the virus spike protein's receptor binding domain, RBD, binds to host cell angiotensin-converting enzyme 2, ACE2, facilitating viral cell entry. In response, the immune system produces antibodies that bind to the viral RBD and prevent cellular entry, reducing viral infectivity.

To detect RBD-targeting SARS-CoV-2 antibodies, take a recombinant bioreporter suspension comprising small-sized protein fragments, fused to SARS-CoV-2 spike RBD. Add standard RBD-targeting SARS-CoV-2 antibodies and antibody-binding magnetic beads. 

During incubation, the Fc antibody region binds to the beads' Fc-binding domains. Additionally, the recombinant bioreporter binds to the bead-bound RBD-targeting SARS-CoV-2 antibodies.

Post-incubation, centrifuge the mixture. Remove the unbound bioreporter-containing supernatant. Resuspend the bound beads in buffer. Transfer to a multi-well plate.

Add a solution containing large-sized protein fragments, having high affinity for small-sized protein fragments. Large and small-sized protein fragments bind together, forming an active engineered luciferase enzyme. 

Add furimazine, a luciferase substrate. Luciferase catalyzes the oxidation of furimazine, causing light emission. Using a luminometer, measure the luminescence, indicative of the presence of neutralizing antibodies.

High signal intensities suggest high concentrations of RBD-targeting SARS-CoV-2 antibodies.

In order to perform the HiBiT-RBD antibody detection assay, prepare the HiBiT-RBD bioreporter, and combine 50 microliters of the HiBiT-RBD-containing supernatant with 1 microgram of the commercial SARS-CoV-2-RBD antibody in a 1.5-milliliter microtube.

Add 20 microliters of immunoglobulin-binding protein, or protein G, to the solution. Bring the total volume to 300 microliters by adding PBS. Incubate the tubes on a tube shaker or rotator for 30 minutes, centrifuge at 12,000 x g for 30 seconds, then, discard the supernatant and wash with PBS. Repeat the process three times to remove free HiBiT-RBD.

Resuspend the cells in 50 microliters of PBS, and transfer it to a 96-well plate. Add 50 microliters of 1x LgBiT, and wait for 5 minutes. Then, add 50 microliters of 1x NanoLuc substrate. Immediately read the luminescence signal with a luminometer.

04:47

Autonoom Bioluminescente zoogdiercellen voor continue en real-time monitoring van de cytotoxiciteit

Gerelateerde video's

0 Bekeken

05:21

Een Luciferase-fluorescerende reporter influenza virus voor Live beeldvorming en kwantificering van virale infectie

Gerelateerde video's

0 Bekeken

10:25

Detectie van SARS-CoV-2 neutraliserende antilichamen met behulp van high-throughput fluorescerende beeldvorming van pseudovirusinfectie

Gerelateerde video's

0 Bekeken

12:09

Protocol voor Recombinant RBD-based SARS Vaccins: Eiwit Voorbereiding, vaccinatie van dieren en het onschadelijk maken Detectie

Gerelateerde video's

0 Bekeken

02:36

The Luciferase Assay: A High-Throughput Assay to Measure Luminescent Signals Using Engineered Nanoluciferase System-Based Bioreporters

Gerelateerde video's

0 Bekeken

07:08

Een Rapid, Multiplex Dual Reporter IgG en IgM SARS-CoV-2 Neutralisatie assay voor een Multiplexed Bead-Based Flow Analysis System

Gerelateerde video's

0 Bekeken

07:44

Detectie van SARS-CoV-2 Receptor-Binding Domain Antibody met behulp van een HiBiT-gebaseerde Bioreporter

Gerelateerde video's

0 Bekeken

08:41

Live beeldvorming en kwantificering van virale infectie bij K18 hACE2 transgene muizen met reporter-expressing recombinant SARS-CoV-2

Gerelateerde video's

0 Bekeken

08:48

Dynamische monitoring van seroconversie met behulp van een multianalyt immunokraaltest voor Covid-19

Gerelateerde video's

0 Bekeken

05:49

Gepseudotypeerde virussen als moleculair hulpmiddel om humorale immuunresponsen tegen SARS-CoV-2 te volgen via neutralisatietest

Gerelateerde video's

0 Bekeken

Laatst bijgewerkt: 22 augustus 2026