ArticleImmunobiology2017
Novel expression of a functional trimeric fragment of human SP-A with efficacy in neutralisation of RSV.
Article in Immunobiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.
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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.
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Who cites it
22 citing papers in PubMed, 27 citations in OpenAlex.
- Functional Characterisation of Surfactant Protein A as a Novel Prophylactic Means against Oncogenic HPV Infections.International journal of molecular sciences · 2024Article
- Multiomics links global surfactant dysregulation with airflow obstruction and emphysema in COPD.ERJ open research · 2023Article
- Amyloid Fibril Formation of Arctic Amyloid-β 1-42 Peptide is Efficiently Inhibited by the BRICHOS Domain.ACS chemical biology · 2022Article
- The collectin SP-A and its trimeric recombinant fragment protect alveolar epithelial cells from the cytotoxic and proinflammatory effects of human cathelicidinFrontiers in immunology · 2022Article
- The Lung Alveolar Cell (LAC) miRNome and Gene Expression Profile of the SP-A-KO Mice After Infection With and Without Rescue With Human Surfactant Protein-A2 (1AFrontiers in immunology · 2022Article
- Hydrophilic But Not Hydrophobic Surfactant Protein Genetic Variants Are Associated With Severe Acute Respiratory Syncytial Virus Infection in Children.Frontiers in immunology · 2022Article
- Cooperative action of SP-A and its trimeric recombinant fragment with polymyxins against Gram-negative respiratory bacteria.Frontiers in immunology · 2022Article
- A Novel Approach for the Production of Aggregation-Prone Proteins Using the Spidroin-Derived NT* Tag.Methods in molecular biology (Clifton, N.J.) · 2022Article
- Microparticles from human the lower airway show inhibitory activity against respiratory syncytial virus.Archives of virology · 2021Article
- Mechanism of Anti-Inflammatory Activity of TLR4-Interacting SPA4 Peptide.ImmunoHorizons · 2021Article
- Review
- Pattern Recognition Proteins: First Line of Defense Against Coronaviruses.Frontiers in immunology · 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
- Single Nucleotide Polymorphisms Interactions of the Surfactant Protein Genes Associated With Respiratory Distress Syndrome Susceptibility in Preterm Infants.Frontiers in pediatrics · 2021Article
- In silico study reveals binding potential of rotenone at multiple sites of pulmonary surfactant proteins: A matter of concern.Current research in toxicology · 2021Article
- The Importance of Redox Status in the Frame of Lifestyle Approaches and the Genetics of the Lung Innate Immune Molecules, SP-A1 and SP-A2, on Differential Outcomes of COVID-19 Infection.Antioxidants (Basel, Switzerland) · 2020Review
- Generation of novel trimeric fragments of human SP-A and SP-D after recombinant soluble expression in E. coli.Immunobiology · 2020Article
- SP-A and SP-D: Dual Functioning Immune Molecules With Antiviral and Immunomodulatory Properties.Frontiers in immunology · 2020Review
- Surfactant Protein A Impairs Genital HPV16 Pseudovirus Infection by Innate Immune Cell Activation in A Murine Model.Pathogens (Basel, Switzerland) · 2019Article
- Surfactant Proteins A and D: Trimerized Innate Immunity Proteins with an Affinity for Viral Fusion Proteins.Journal of innate immunity · 2019Review
Corrections and comments
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Authors and funding
12 authors at 5 institutions in 3 countries.
Funding
Abstract
Respiratory syncytial virus (RSV) is the leading cause of bronchiolitis and hospitalisation of infants in developed countries. Surfactant protein A (SP-A) is an important innate immune molecule, localized in pulmonary surfactant. SP-A binds to carbohydrates on the surface of pathogens in a calcium-dependent manner to enable neutralisation, agglutination and clearance of pathogens including RSV. SP-A forms trimeric units and further oligomerises through interactions between its N-terminal domains. Whilst a recombinant trimeric fragment of the closely related molecule (surfactant protein D) has been shown to retain many of the native protein's functions, the importance of the SP-A oligomeric structure in its interaction with RSV has not been determined. The aim of this study was to produce a functional trimeric recombinant fragment of human (rfh)SP-A, which lacks the N-terminal domain (and the capacity to oligomerise) and test its ability to neutralise RSV in an in vitro model of human bronchial epithelial infection. We used a novel expression tag derived from spider silk proteins ('NT') to produce rfhSP-A in Escherichia coli, which we found to be trimeric and to bind to mannan in a calcium-dependent manner. Trimeric rfhSP-A reduced infection levels of human bronchial epithelial (AALEB) cells by RSV by up to a mean (±SD) of 96.4 (±1.9) % at 5μg/ml, which was significantly more effective than dimeric rfhSP-A (34.3 (±20.5) %) (p<0.0001). Comparatively, native human SP-A reduced RSV infection by up to 38.5 (±28.4) %. For the first time we report the development of a functional trimeric rfhSP-A molecule which is highly efficacious in neutralising RSV, despite lacking the N-terminal domain and capacity to oligomerise.
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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.