A cell-free high throughput assay for assessment of SARS-CoV-2 neutralizing antibodies.
N Biotechnol
; 66: 46-52, 2022 Jan 25.
Article
in English
| MEDLINE | ID: covidwho-1458735
ABSTRACT
Highly accurate serological tests are key to assessing the prevalence of SARS-CoV-2 antibodies and the level of immunity in the population. This is important to predict the current and future status of the pandemic. With the recent emergence of new and more infectious SARS-CoV-2 variants, assays allowing for high throughput analysis of antibodies able to neutralize SARS-CoV-2 become even more important. Here, we report the development and validation of a robust, high throughput method, which enables the assessment of antibodies inhibiting the binding between the SARS-CoV-2 spike protein and angiotensin converting enzyme 2 (ACE2). The assay uses recombinantly produced spike-f and ACE2 and is performed in a bead array format, which allows analysis of up to 384 samples in parallel per instrument over seven hours, demanding only one hour of manual handling. The method is compared to a microneutralization assay utilising live SARS-CoV-2 and is shown to deliver highly correlating data. Further, a comparison with a serological method that measures all antibodies recognizing the spike protein shows that this type of assessment provides important insights into the neutralizing efficiency of the antibodies, especially for individuals with low antibody levels. This method can be an important and valuable tool for large-scale assessment of antibody-based neutralization, including neutralization of new spike variants that might emerge.
Keywords
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Antibodies, Neutralizing
/
SARS-CoV-2
/
COVID-19
/
Antibodies, Viral
Type of study:
Observational study
/
Prognostic study
Topics:
Variants
Limits:
Humans
Language:
English
Journal:
N Biotechnol
Journal subject:
Molecular Biology
/
Biomedical Engineering
Year:
2022
Document Type:
Article
Affiliation country:
J.nbt.2021.10.002
Similar
MEDLINE
...
LILACS
LIS