Abstract
We still know very little about how the human immune system responds to SARS-CoV-2. Here we construct a SARS-CoV-2 proteome microarray containing 18 out of the 28 predicted proteins and apply it to the characterization of the IgG and IgM antibodies responses in the sera from 29 convalescent patients. We find that all these patients had IgG and IgM antibodies that specifically bind SARS-CoV-2 proteins, particularly the N protein and S1 protein. Besides these proteins, significant antibody responses to ORF9b and NSP5 are also identified. We show that the S1 specific IgG signal positively correlates with age and the level of lactate dehydrogenase (LDH) and negatively correlates with lymphocyte percentage. Overall, this study presents a systemic view of the SARS-CoV-2 specific IgG and IgM responses and provides insights to aid the development of effective diagnostic, therapeutic and vaccination strategies.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Adult
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Antibodies, Viral / immunology*
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Betacoronavirus / immunology*
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COVID-19
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Coronavirus 3C Proteases
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Coronavirus Infections / immunology
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Coronavirus Nucleocapsid Proteins
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Enzyme-Linked Immunosorbent Assay
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Female
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Humans
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Immunoglobulin G / immunology*
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Immunoglobulin M / immunology*
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L-Lactate Dehydrogenase / blood
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Male
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Middle Aged
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Nucleocapsid Proteins / immunology
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Pandemics
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Phosphoproteins
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Pneumonia, Viral / immunology
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Protein Array Analysis / methods*
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Proteome / analysis
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Proteome / immunology
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SARS-CoV-2
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Spike Glycoprotein, Coronavirus / immunology
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Viral Nonstructural Proteins / immunology
Substances
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Antibodies, Viral
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Coronavirus Nucleocapsid Proteins
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Immunoglobulin G
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Immunoglobulin M
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Nucleocapsid Proteins
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Phosphoproteins
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Proteome
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Spike Glycoprotein, Coronavirus
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Viral Nonstructural Proteins
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nucleocapsid phosphoprotein, SARS-CoV-2
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spike protein, SARS-CoV-2
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L-Lactate Dehydrogenase
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3C-like proteinase, SARS-CoV-2
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Coronavirus 3C Proteases