Evidence map›Paper›PMID 25470730›Full record

ArticlePloS one2014

Environmentally determined differences in the murine lung microbiota and their relation to alveolar architecture.

Yeojun Yun, Girish Srinivas, Sven Kuenzel, Miriam Linnenbrink, Safa Alnahas, Kenneth D Bruce, Ulrich Steinhoff, John F Baines, Ulrich E Schaible

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 98 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
98citing papers in PubMed, 1 pooled it
3.7field-weighted citation impact, top 6% of its field
1 · What the graph read from it

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

98 citing papers in PubMed, 1 synthesis or guideline pooled it, 155 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Review
  4. Germinal center responses at barrier organ sites.Current opinion in immunology · 2026
    Review
  5. Review
  6. Article
  7. Article
  8. Pulmonary mucoidMicrobiology spectrum · 2026
    Article
  9. Review
  10. Review
  11. Review
  12. Review
  13. Article
  14. Article
  15. Article
  16. Review
  17. Article
  18. The neonate respiratory microbiome.Acta physiologica (Oxford, England) · 2025
    Review
  19. Article
  20. Article

38 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 6 institutions in 2 countries.

Yeojun YunResearch Center Borstel, Cellular Microbiology Group, Department of Molecular Infection Biology, Borstel, Germany.
Girish SrinivasMPI for Evolutionary Biology, Plön, Germany; Department of Dermatology, University of Lübeck, Lübeck, Germany.
Sven KuenzelMPI for Evolutionary Biology, Plön, Germany; Evolutionary Genomics, Institute for Experimental Medicine, Christian-Albrechts-University, Kiel, Germany.
Miriam LinnenbrinkMPI for Evolutionary Biology, Plön, Germany; Evolutionary Genomics, Institute for Experimental Medicine, Christian-Albrechts-University, Kiel, Germany.
Safa AlnahasInstitute for Medical Microbiology and Hospital Hygiene, Philipps University Marburg, Marburg, Germany.
Kenneth D BruceInstitute of Pharmaceutical Science, King's College London, London, United Kingdom.
Ulrich SteinhoffInstitute for Medical Microbiology and Hospital Hygiene, Philipps University Marburg, Marburg, Germany.
John F BainesMPI for Evolutionary Biology, Plön, Germany; Evolutionary Genomics, Institute for Experimental Medicine, Christian-Albrechts-University, Kiel, Germany.
Ulrich E SchaibleResearch Center Borstel, Cellular Microbiology Group, Department of Molecular Infection Biology, Borstel, Germany.
Kiel University · DEPhilipps University of Marburg · DEResearch Center Borstel - Leibniz Lung Center · DEKing's College London · GBMax Planck Institute for Evolutionary Biology · DEUniversity of Lübeck · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Commensal bacteria control the micro-ecology of metazoan epithelial surfaces with pivotal effect on tissue homeostasis and host defense. In contrast to the upper respiratory tract, the lower respiratory tract of healthy individuals has largely been considered free of microorganisms. To understand airway micro-ecology we studied microbiota of sterilely excised lungs from mice of different origin including outbred wild mice caught in the natural environment or kept under non-specific-pathogen-free (SPF) conditions as well as inbred mice maintained in non-SPF, SPF or germ-free (GF) facilities. High-throughput pyrosequencing of reverse transcribed 16S rRNA revealed metabolically active murine lung microbiota in all but GF mice. The overall composition across samples was similar at the phylum and family level. However, species richness was significantly different between lung microbiota from SPF and non-SPF mice. Non-cultivatable Betaproteobacteria such as Ralstonia spp. made up the major constituents and were also confirmed by 16S rRNA gene cloning analysis. Additionally, Pasteurellaceae, Enterobacteria and Firmicutes were isolated from lungs of non-SPF mice. Bacterial communities were detectable by fluorescent in situ hybridization (FISH) at alveolar epithelia in the absence of inflammation. Notably, higher bacterial abundance in non-SPF mice correlated with more and smaller size alveolae, which was corroborated by transplanting Lactobacillus spp. lung isolates into GF mice. Our data indicate a common microbial composition of murine lungs, which is diversified through different environmental conditions and affects lung architecture. Identification of the microbiota of murine lungs will pave the path to study their influence on pulmonary immunity to infection and allergens using mouse models.

Indexed as

MicrobiotaAnimalsBacteriaHigh-Throughput Nucleotide SequencingLungMiceMice, Inbred C57BLMolecular Sequence DataPhylogenyPulmonary AlveoliRNA, Ribosomal, 16SSequence Analysis, RNASpecific Pathogen-Free OrganismsRNA, Ribosomal, 16S

Identifiers

PMID25470730
PMCPMC4254600
OpenAlexW2010481157

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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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.