SARS-CoV-2 exacerbates proinflammatory responses in myeloid cells through C-type lectin receptors and Tweety family member 2
SARS-CoV-2 exacerbates proinflammatory responses in myeloid cells through C-type lectin receptors and Tweety family member 2
Despite mounting evidence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) engagement with immune cells, most express little, if any, of the canonical receptor of SARS-CoV-2, angiotensin-converting enzyme 2 (ACE2). Here, using a myeloid cell receptor-focused ectopic expression screen, we identified several C-type lectins (DC-SIGN, L-SIGN, LSECtin, ASGR1, and CLEC10A) and Tweety family member 2 (TTYH2) as glycan-dependent binding partners of the SARS-CoV-2 spike. Except for TTYH2, these molecules primarily interacted with spike via regions outside of the receptor-binding domain. Single-cell RNA sequencing analysis of pulmonary cells from individuals with coronavirus disease 2019 (COVID-19) indicated predominant expression of these molecules on myeloid cells. Although these receptors do not support active replication of SARS-CoV-2, their engagement with the virus induced robust proinflammatory responses in myeloid cells that correlated with COVID-19 severity. We also generated a bispecific anti-spike nanobody that not only blocked ACE2-mediated infection but also the myeloid receptor-mediated proinflammatory responses. Our findings suggest that SARS-CoV-2-myeloid receptor interactions promote immune hyperactivation, which represents potential targets for COVID-19 therapy.
- New York University United States
- Institute of Basic Medical Sciences and Peking Union Medical College Hospital, Chinese Academy of Medical Sciences / Peking Union Medical College. China (People's Republic of)
- The University of Texas Southwestern Medical Center United States
- Peking University China (People's Republic of)
- New York University Langone Medical Center United States
Models, Molecular, Binding Sites, Protein Conformation, SARS-CoV-2, COVID-19, Membrane Proteins, Single-Domain Antibodies, Article, Cell Line, Neoplasm Proteins, Structure-Activity Relationship, Gene Expression Regulation, Host-Pathogen Interactions, Spike Glycoprotein, Coronavirus, Cytokines, Humans, Lectins, C-Type, Myeloid Cells, Angiotensin-Converting Enzyme 2, Inflammation Mediators, Protein Binding
Models, Molecular, Binding Sites, Protein Conformation, SARS-CoV-2, COVID-19, Membrane Proteins, Single-Domain Antibodies, Article, Cell Line, Neoplasm Proteins, Structure-Activity Relationship, Gene Expression Regulation, Host-Pathogen Interactions, Spike Glycoprotein, Coronavirus, Cytokines, Humans, Lectins, C-Type, Myeloid Cells, Angiotensin-Converting Enzyme 2, Inflammation Mediators, Protein Binding
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