Evidence map›Paper›PMID 33611840›Full record

ArticleJournal of cellular and molecular medicine2021

Metformin attenuates post-epidural fibrosis by inhibiting the TGF-β1/Smad3 and HMGB1/TLR4 signaling pathways.

Zeyuan Song, Tao Wu, Jinpeng Sun, Haoran Wang, Feng Hua, Yap San Min Nicolas, Rupesh Kc, Kun Chen, Zhen Jin, Jun Liu and 1 more

Open access · goldAbstract read
In one paragraph

Article in Journal of cellular and molecular medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
2.9field-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

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 23 citations in OpenAlex.

  1. Pooled it
  2. Ginsenoside Rg1 mitigates epidural fibrosis after laminectomy in rats: histopathological, TUNEL, and transcriptional evidence.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026
    Article
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  8. TLR4 induced TRPM2 mediated neuropathic pain.Frontiers in pharmacology · 2024
    Review
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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

11 authors at 2 institutions in 1 country.

Zeyuan SongDepartment of Orthopaedics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Tao WuDepartment of Orthopaedics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Jinpeng SunDepartment of Orthopaedics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Haoran WangDepartment of Orthopaedics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Feng HuaDepartment of Orthopaedics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Yap San Min NicolasDepartment of Orthopaedics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Rupesh KcDepartment of Orthopaedics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Kun ChenDepartment of Orthopaedics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Zhen JinDepartment of Orthopaedics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Jun LiuDepartment of Orthopaedics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Mingshun ZhangNHC Key Laboratory of Antibody Technique, Department of Immunology, Nanjing Medical University, Nanjing, China.ORCID 0000-0001-5925-0168
Second Affiliated Hospital of Nanjing Medical University · CNNanjing Medical University · CN

Funding

Jiangsu Provincial Commission of Health and Family Planning, the 'Six One' Project of Jiangsu Province LGY2016018Jiangsu Provincial Personnel Department 'the Great of Six Talented Man Peak' Project WSW-040National Natural Science Foundation of China 81671563
6 · The paper itself

Abstract

Excessive post-epidural fibrosis is a common cause of recurrent back pain after spinal surgery. Though various treatment methods have been conducted, the safe and effective drug for alleviating post-epidural fibrosis remains largely unknown. Metformin, a medicine used in the treatment of type 2 diabetes, has been noted to relieve fibrosis in various organs. In the present study, we aimed to explore the roles and mechanisms of metformin in scar formation in a mouse model of laminectomy. Post-epidural fibrosis developed in a mouse model of laminectomy by spinous process and the T12-L2 vertebral plate with a rongeur. With the administration of metformin, post-epidural fibrosis was reduced, accompanied with decreased collagen and fibronectin in the scar tissues. Mechanistically, metformin decreased fibronectin and collagen deposition in fibroblast cells, and this effect was dependent on the HMGB1/TLR4 and TGF-β1/Smad3 signalling pathways. In addition, metformin influenced the metabolomics of the fibroblast cells. Taken together, our study suggests that metformin may be a potential option to mitigate epidural fibrosis after laminectomy.

Indexed as

AnimalsFailed Back Surgery SyndromeFibrosisHMGB1 ProteinHumansMaleMetforminMiceMice, Inbred C57BLNIH 3T3 CellsSignal TransductionSmad3 ProteinToll-Like Receptor 4Transforming Growth Factor betaHMGB1 ProteinMetforminSmad3 ProteinToll-Like Receptor 4Transforming Growth Factor betaepidural fibrosisHMGB1metabolomicsmetforminspine operationTGF-β1

Identifiers

PMID33611840
PMCPMC8034438
OpenAlexW3130712798

What OpenQuestion holds

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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.