Development and Validation of a Multiplex, Bead-based Assay to Detect Antibodies Directed Against SARS-CoV-2 Proteins.

Abstract:

BACKGROUND:Transplant recipients who develop COVID-19 may be at increased risk for morbidity and mortality. Determining the status of antibodies against SARS-CoV-2 in both candidates and recipients will be important to understand the epidemiology and clinical course of COVID-19 in this population. While there are multiple tests to detect antibodies to SARS-CoV-2, their performance is variable. Tests vary according to their platforms and the antigenic targets which make interpretation of the results challenging. Furthermore, for some assays, sensitivity and specificity are less than optimal. Additionally, currently available serological tests do not exclude the possibility that positive responses are due to cross reactive antibodies to community coronaviruses rather than SARS-CoV-2. METHODS:This study describes the development and validation of a high-throughput multiplex antibody detection assay. RESULTS:The multiplex assay has the capacity to identify, simultaneously, patient responses to 5 SARS-CoV-2 proteins, namely, the full spike protein, 3 individual domains of the spike protein (S1, S2, and receptor binding domain), and the nucleocapsid protein. The antibody response to the above proteins are SARS-CoV-2-specific, as antibodies against 4 common coronaviruses do not cross-react. CONCLUSIONS:This new assay provides a novel tool to interrogate the spectrum of immune responses to SAR-CoV-2 and is uniquely suitable for use in the transplant setting. Test configuration is essentially identical to the single antigen bead assays used in the majority of histocompatibility laboratories around the world and could easily be implemented into routine screening of transplant candidates and recipients.

journal_name

Transplantation

journal_title

Transplantation

authors

Bray RA,Lee JH,Brescia P,Kumar D,Nong T,Shih R,Woodle ES,Maltzman JS,Gebel HM

doi

10.1097/TP.0000000000003524

subject

Has Abstract

pub_date

2021-01-01 00:00:00

pages

79-89

issue

1

eissn

0041-1337

issn

1534-6080

pii

00007890-202101000-00016

journal_volume

105

pub_type

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