Evidence map›Paper›PMID 34937175›Full record

ArticleMicrobiology spectrum2021

Neutrophil-Mediated Lung Injury Both via TLR2-Dependent Production of IL-1α and IL-12 p40, and TLR2-Independent CARDS Toxin after Mycoplasma pneumoniae Infection in Mice.

Shigeyuki Tamiya, Eisuke Yoshikawa, Monami Ogura, Etsushi Kuroda, Koichiro Suzuki, Yasuo Yoshioka

Open access · goldAbstract read
In one paragraph

Article in Microbiology spectrum, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 7% 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

31 citing papers in PubMed, 1 synthesis or guideline pooled it, 34 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Observational
  5. Article
  6. Article
  7. Article
  8. Host immune dysfunction and Mycoplasma pneumoniae immune evasion: dual drivers of pathogenesis in Mycoplasma pneumoniae pneumonia.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2026
    Review
  9. Nasal delivery ofMicrobiology spectrum · 2026
    Article
  10. Article
  11. A multi-epitope vaccine targetingFrontiers in immunology · 2026
    Article
  12. Immune dysregulation inFrontiers in immunology · 2026
    Review
  13. Article
  14. Article
  15. Review
  16. Article
  17. [Protective effect ofNan fang yi ke da xue xue bao = Journal of Southern Medical University · 2024
    Article
  18. Article
  19. Review
  20. Article
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

6 authors at 3 institutions in 1 country.

Shigeyuki TamiyaLaboratory of Nano-Design for Innovative Drug Development, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, Japan.
Eisuke YoshikawaLaboratory of Nano-Design for Innovative Drug Development, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, Japan.
Monami OguraLaboratory of Nano-Design for Innovative Drug Development, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, Japan.
Etsushi KurodaDepartment of Immunology and Medical Zoology, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan.
Koichiro SuzukiThe Research Foundation for Microbial Diseases of Osaka University, Suita, Osaka, Japan.
Yasuo YoshiokaLaboratory of Nano-Design for Innovative Drug Development, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, Japan.ORCID 0000-0002-7265-9221
Kyoto Biken Laboratories (Japan) · JPHyogo Medical University · JPThe University of Osaka · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mycoplasma pneumoniae (Mp) residing extracellularly in the respiratory tract is the primary cause of bacterial community-acquired pneumonia in humans. However, the detailed pathological mechanism of Mp infection, especially inflammation in the lung, remains unclear. This study examined the role of the neutrophils in the inflammation of Mp-induced pneumonia in mice and the mechanism of neutrophil infiltration into the lungs in the Mp-induced pneumonia. We observed massive infiltration of neutrophils in the bronchoalveolar lavage fluid (BALF) and lung injury after the Mp challenge. The neutrophils were shown to contribute to lung injury in Mp pneumonia but were not involved in eliminating Mp, suggesting that neutrophils are detrimental to the host in Mp pneumonia. Mp also induced the production of inflammatory cytokines and chemokines in the BALF in a toll-like receptor 2 (TLR2)-dependent manner. Particularly, both interleukin (IL)-1α and IL-12 p40 played a crucial role in neutrophil infiltration into the BALF in a coordinated manner. Both IL-1α and IL-12 p40 were released from the alveolar macrophages depending on the TLR2 and reactive oxygen species. In addition, the community-acquired respiratory distress syndrome (CARDS) toxin from Mp were found to induce neutrophil infiltration into BALF in a TLR2-independent and IL-1α-dependent manner. Collectively, the TLR2-dependent production of both IL-1α and IL-12 p40, and CARDS toxin have been elucidated to play an important role in neutrophil infiltration into the lungs subsequently leading to the lung injury upon Mp infection in mice. These data will aid in the development of therapeutics and vaccines for Mp pneumonia.

Indexed as

AnimalsBacterial ProteinsBacterial ToxinsBronchoalveolar Lavage FluidInflammationInterleukin-12Interleukin-1alphaLungLung InjuryMacrophages, AlveolarMiceMycoplasma pneumoniaeNeutrophil InfiltrationNeutrophilsPneumonia, MycoplasmaReactive Oxygen SpeciesBacterial ProteinsBacterial ToxinsCARDS toxin, Mycoplasma pneumoniaeIl1a protein, mouseInterleukin-12Interleukin-1alphaReactive Oxygen SpeciesTlr2 protein, mouseToll-Like Receptor 2alveolar macrophageinfectioninflammationlung injuryMycoplasma pneumoniaeneutrophilstoxin

Identifiers

PMID34937175
PMCPMC8694186
OpenAlexW4200249318

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.