ArticleFrontiers in immunology2024
Human surfactant protein A inhibits SARS-CoV-2 infectivity and alleviates lung injury in a mouse infection model.
Article in Frontiers in immunology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 19 citations in OpenAlex.
- Article
- Transient receptor potential vanilloid 4 (TRPV4) channels mediate pulmonary surfactant protein A and D secretion.American journal of respiratory cell and molecular biology · 2026Article
- The cell with many faces: lung macrophage plasticity and function in response to environmental and pathogenic insults.Physiological reviews · 2026Review
- Roles of sex and SP-A genetic variants in modulating multiorgan injuries post viral infection.Frontiers in immunology · 2026Article
- Potential for Core Fucose-Targeted Therapy Against HBV Infection of Human Normal Hepatocytes.Viruses · 2025Article
- Pathogenesis of influenza and SARS-CoV-2 co-infection at the extremes of age: decipher the ominous tales of immune vulnerability.Advanced biotechnology · 2025Review
- Differential immunoregulation by human surfactant protein A variants determines severity of SARS-CoV-2-induced lung disease.Frontiers in immunology · 2025Article
- Could SP-A and SP-D Serum Levels Predict COVID-19 Severity?International journal of molecular sciences · 2024Article
- Cooperation of immune regulators Tollip and surfactant protein A inhibits influenza A virus infection in mice.Respiratory research · 2024Article
- Diminished Neutralization Capacity of SARS-CoV-2 Omicron BA.1 in Donor Plasma Collected from January to March 2021.Microbiology spectrum · 2023Article
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8 authors at 2 institutions in 1 country.
Funding
Abstract
Introduction: SARS coronavirus 2 (SARS-CoV-2) infects human angiotensin-converting enzyme 2 (hACE2)-expressing lung epithelial cells through its spike (S) protein. The S protein is highly glycosylated and could be a target for lectins. Surfactant protein A (SP-A) is a collagen-containing C-type lectin, expressed by mucosal epithelial cells and mediates its antiviral activities by binding to viral glycoproteins. Objective: This study examined the mechanistic role of human SP-A in SARS-CoV-2 infectivity and lung injury Results: Human SP-A can bind both SARS-CoV-2 S protein and hACE2 in a dose-dependent manner (p<0.01). Pre-incubation of SARS-CoV-2 (Delta) with human SP-A inhibited virus binding and entry and reduced viral load in human lung epithelial cells, evidenced by the dose-dependent decrease in viral RNA, nucleocapsid protein (NP), and titer (p<0.01). We observed significant weight loss, increased viral burden, and mortality rate, and more severe lung injury in SARS-CoV-2 infected hACE2/SP-A KO mice (SP-A deficient mice with hACE2 transgene) compared to infected hACE2/mSP-A (K18) and hACE2/hSP-A1 (6A Discussion: Collectively, human SP-A attenuates SARS-CoV-2-induced acute lung injury (ALI) by directly binding to the S protein and hACE2, and inhibiting its infectivity; and SP-A level in the saliva of COVID-19 patients might serve as a biomarker for COVID-19 severity.
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