ArticleClinical proteomics2022
A novel non-invasive method allowing for discovery of pathologically relevant proteins from small airways.
Article in Clinical proteomics, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 7 papers.
What it found
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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.
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Who cites it
7 citing papers in PubMed, 12 citations in OpenAlex.
- From FEVJournal of asthma and allergy · 2026Review
- Exosomes as Biomarkers and Therapeutic Agents in Neurodegenerative Diseases: Current Insights and Future Directions.Molecular neurobiology · 2025Review
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- Particles in Exhaled Air (PExA): Clinical Uses and Future Implications.Diagnostics (Basel, Switzerland) · 2024Review
- Urinary SPP1 has potential as a non-invasive diagnostic marker for focal segmental glomerulosclerosis.FEBS open bio · 2023Article
- Extracellular Vesicles (EVs) as Crucial Mediators of Cell-Cell Interaction in Asthma.International journal of molecular sciences · 2023Review
- Correction to: A novel non‑invasive method allowing for discovery of pathologically relevant proteins from small airways.Clinical proteomics · 2022Article
Corrections and comments
- Erratum issued
Authors and funding
8 authors at 5 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThere is a lack of early and precise biomarkers for personalized respiratory medicine. Breath contains an aerosol of droplet particles, which are formed from the epithelial lining fluid when the small airways close and re-open during inhalation succeeding a full expiration. These particles can be collected by impaction using the PExA RESEARCH QUESTION: Our aim was to investigate if PExA method is useful for discovery of biomarkers that reflect pathology of small airways. METHODS AND ANALYSIS: Ten healthy controls and 20 subjects with asthma, of whom 10 with small airway involvement as indicated by a high lung clearance index (LCI ≥ 2.9 z-score), were examined in a cross-sectional design, using the PExA instrument. The samples were analysed with the SOMAscan proteomics platform (SomaLogic Inc.).
resultsTwo hundred-seven proteins were detected in up to 80% of the samples. Nine proteins showed differential abundance in subjects with asthma and high LCI as compared to healthy controls. Two of these were less abundant (ALDOA4, C4), and seven more abundant (FIGF, SERPINA1, CD93, CCL18, F10, IgM, IL1RAP). sRAGE levels were lower in ex-smokers (n = 14) than in never smokers (n = 16). Gene Ontology (GO) annotation database analyses revealed that the PEx proteome is enriched in extracellular proteins associated with extracellular exosome-vesicles and innate immunity.
conclusionThe applied analytical method was reproducible and allowed identification of pathologically interesting proteins in PEx samples from asthmatic subjects with high LCI. The results suggest that PEx based proteomics is a novel and promising approach to study respiratory diseases with small airway involvement.
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