Evidence map›Paper›PMID 34040396›Full record

ArticleJournal of asthma and allergy2021

MiR-21-5p in Macrophage-Derived Exosomes Targets Smad7 to Promote Epithelial Mesenchymal Transition of Airway Epithelial Cells.

Xiang Li, Nan Yang, Qi Cheng, Han Zhang, Fen Liu, Yunxiao Shang

Open access · goldAbstract read
In one paragraph

Article in Journal of asthma and allergy, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed
2.6field-weighted citation impact, top 9% 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

29 citing papers in PubMed, 42 citations in OpenAlex.

  1. Review
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  7. A new era of cancer immunotherapy: vaccines and miRNAs.Cancer immunology, immunotherapy : CII · 2025
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  8. Article
  9. Article
  10. Review
  11. Article
  12. Review
  13. Review
  14. Article
  15. Review
  16. Review
  17. Recent miRNA Research in Asthma.Current allergy and asthma reports · 2022
    Review
  18. Recent Advances in Nanomaterials for Asthma Treatment.International journal of molecular sciences · 2022
    Review
  19. Plasticity towards Rigidity: A Macrophage Conundrum in Pulmonary Fibrosis.International journal of molecular sciences · 2022
    Review
  20. Review
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 1 institution in 1 country.

Xiang LiDepartment of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, 110004, People's Republic of China.
Nan YangDepartment of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, 110004, People's Republic of China.
Qi ChengDepartment of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, 110004, People's Republic of China.
Han ZhangDepartment of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, 110004, People's Republic of China.
Fen LiuDepartment of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, 110004, People's Republic of China.
Yunxiao ShangDepartment of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, 110004, People's Republic of China.
China Medical University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAsthma is usually associated with airway inflammation and airway remodeling. Epithelial mesenchymal transition (EMT) often occurs in airway remodeling. The purpose of this study is to identify the effect of miR-21-5p and Smad7 signaling pathway in macrophage-derived exosomes on EMT of airway epithelial cells.

methodsHE staining and Masson staining were used to verify the successful establishment of the asthma model. The levels of epithelial cell adhesion factor and stromal cell markers were detected by Western blot. The levels of miR-21-5p were detected by qRT-PCR. The expression of miR-21-5p in lung tissue was further verified by fluorescence in situ hybridization (FISH). Exosome morphology was observed by transmission electron microscopy (TEM) and nanoparticle tracking analysis (NTA). Luciferase reporter assay was applied to analyze the interaction of miR-21-5p with Smad7.

resultsThe expression of miR-21-5p was upregulated in macrophages of rats in vivo with OVA-induced asthma. In vitro cultured alveolar macrophages stimulated by LPS could secrete exosomes with high levels of miR-21-5p. The exosome-derived miR-21-5p promotes EMT in rat tracheal epithelial cells through TGFβ1/Smad signaling pathway by downregulating Smad7. This process can be blocked by miR-21-5p inhibitor.

conclusionRat alveolar macrophages produced high levels of miR-21-5p-containing exosomes, which transported miR-21-5p to tracheal epithelial cells, thus promoting EMT through TGF-β1/Smad signaling pathway by targeting Smad7.

Indexed as

asthmaepithelial mesenchymal transitionexosomesmiR-21-5pmiRNASmad7

Identifiers

PMID34040396
PMCPMC8140948
OpenAlexW3161635549

What OpenQuestion holds

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LicenceCC BY-NC
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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.