A Rapid Assay for SARS-CoV-2 Neutralizing Antibodies That Is Insensitive to Antiretroviral Drugs.

A Rapid Assay for SARS-CoV-2 Neutralizing Antibodies That Is Insensitive to Antiretroviral Drugs.
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DOI:
10.4049/jimmunol.2100155
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发表时间:
2021-07-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Nemazee D
Nemazee D
中科院分区:
其他
文献类型:
--
作者:
Huang D;Tran JT;Peng L;Yang L;Suhandynata RT;Hoffman MA;Zhao F;Song G;He WT;Limbo O;Callaghan S;Landais E;Andrabi R;Sok D;Jardine JG;Burton DR;Voss JE;Fitzgerald RL;Nemazee D

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SARS-CoV-2 spike pseudotyped virus (PSV) assays are widely used to measure neutralization titers of sera and of isolated neutralizing antibodies (nAbs). PSV neutralization assays are safer than live virus neutralization assays and do not require access to BSL-3 laboratories. However, many PSV assays are nevertheless somewhat challenging and require at least two days to carry out. Here, we report a rapid (<30 min), sensitive, cell-free, off-the-shelf and accurate assay for receptor binding domain (RBD) nAb detection. Our proximity-based luciferase assay takes advantage of the fact that the most potent SARS-CoV-2 nAbs function by blocking the binding between SARS-CoV-2 and ACE2. The method was validated using isolated nAbs and sera from spike-immunized animals and COVID-19 patients. The method was particularly useful in HIV patients taking antiretroviral therapies that interfere with the conventional PSV assay. The method provides a cost-effective and point-of-care alternative to evaluate the potency and breadth of the predominant SARS-CoV-2 neutralizing antibodies elicited by infection or vaccines.
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