ArticleThe Journal of biological chemistry2011
Surfactant protein A (SP-A)-mediated clearance of Staphylococcus aureus involves binding of SP-A to the staphylococcal adhesin eap and the macrophage receptors SP-A receptor 210 and scavenger receptor class A.
Article in The Journal of biological chemistry, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 48 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
48 citing papers in PubMed, 73 citations in OpenAlex.
- The Opposite Roles of Benzo[Environment & health (Washington, D.C.) · 2026Article
- Surfactant proteins A and D nucleotide variants: association with retinal vascular disease.Pediatric research · 2026Article
- SARS-CoV-2 Spike Protein and Molecular Mimicry: An Immunoinformatic Screen for Cross-Reactive Autoantigen Candidates.International journal of molecular sciences · 2025Article
- Article
- Adaptation and conservation of CL-10/11 in avian lungs: implications for their role in pulmonary innate immune protection.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025Article
- Unraveling the enigma: The emerging significance of pulmonary surfactant proteins in predicting, diagnosing, and managing COVID-19.Immunity, inflammation and disease · 2024Review
- Disruption of the SP-A/SP-R210American journal of physiology. Lung cellular and molecular physiology · 2024Article
- Are the class 18 myosins Myo18A and Myo18B specialist sarcomeric proteins?Frontiers in physiology · 2024Review
- Collectins and ficolins in neonatal health and disease.Frontiers in immunology · 2023Review
- Surfactant protein A alters endosomal trafficking of influenza A virus in macrophages.Frontiers in immunology · 2023Article
- Genomic and epigenomic adaptation in SP-R210 (Myo18A) isoform-deficient macrophages.Immunobiology · 2021Article
- Surfactant Protein-A Function: Knowledge Gained From SP-A Knockout Mice.Frontiers in pediatrics · 2021Review
- Human Surfactant Protein SP-A1 and SP-A2 Variants Differentially Affect the Alveolar Microenvironment, Surfactant Structure, Regulation and Function of the Alveolar Macrophage, and Animal and Human Survival Under Various Conditions.Frontiers in immunology · 2021Review
- Recent progress on surfactant protein A: cellular function in lung and kidney disease development.American journal of physiology. Cell physiology · 2020Review
- Lipid-Protein and Protein-Protein Interactions in the Pulmonary Surfactant System and Their Role in Lung Homeostasis.International journal of molecular sciences · 2020Review
- Article
- The Role of Macrophages inFrontiers in immunology · 2020Review
- Structural and Functional Determinants of Rodent and Human Surfactant Protein A: A Synthesis of Binding and Computational Data.Frontiers in immunology · 2019Article
- MYO18A: An unusual myosin.Advances in biological regulation · 2018Review
- The Basic Science and Molecular Mechanisms of Lung Injury and Acute Respiratory Distress Syndrome.International anesthesiology clinics · 2018Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
11 authors at 5 institutions in 2 countries.
Funding
Abstract
Staphylococcus aureus causes life-threatening pneumonia in hospitals and deadly superinfection during viral influenza. The current study investigated the role of surfactant protein A (SP-A) in opsonization and clearance of S. aureus. Previous studies showed that SP-A mediates phagocytosis via the SP-A receptor 210 (SP-R210). Here, we show that SP-R210 mediates binding and control of SP-A-opsonized S. aureus by macrophages. We determined that SP-A binds S. aureus through the extracellular adhesin Eap. Consequently, SP-A enhanced macrophage uptake of Eap-expressing (Eap(+)) but not Eap-deficient (Eap(-)) S. aureus. In a reciprocal fashion, SP-A failed to enhance uptake of Eap(+) S. aureus in peritoneal Raw264.7 macrophages with a dominant negative mutation (SP-R210(DN)) blocking surface expression of SP-R210. Accordingly, WT mice cleared infection with Eap(+) but succumbed to sublethal infection with Eap- S. aureus. However, SP-R210(DN) cells compensated by increasing non-opsonic phagocytosis of Eap(+) S. aureus via the scavenger receptor scavenger receptor class A (SR-A), while non-opsonic uptake of Eap(-) S. aureus was impaired. Macrophages express two isoforms: SP-R210(L) and SP-R210(S). The results show that WT alveolar macrophages are distinguished by expression of SP-R210(L), whereas SR-A(-/-) alveolar macrophages are deficient in SP-R210(L) expressing only SP-R210(S). Accordingly, SR-A(-/-) mice were highly susceptible to both Eap(+) and Eap(-) S. aureus. The lungs of susceptible mice generated abnormal inflammatory responses that were associated with impaired killing and persistence of S. aureus infection in the lung. In conclusion, alveolar macrophage SP-R210(L) mediates recognition and killing of SP-A-opsonized S. aureus in vivo, coordinating inflammatory responses and resolution of S. aureus pneumonia through interaction with SR-A.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.