Evidence map›Paper›PMID 32623572›Full record

ArticleWorld journal of surgery2020

Matrix Metalloproteinases (MMP-2) and Tissue Inhibitors of Metalloproteinases (TIMP-2) in Patients with Inguinal Hernias.

Dianchen Wang, Yuqian Han, Xiuli Xu, Jianmin Chen, Yake Chen

Abstract read
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In one paragraph

Article in World journal of surgery, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 2 pooled it
1.4field-weighted citation impact, top 18% 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

9 citing papers in PubMed, 2 syntheses or guidelines pooled it, 11 citations in OpenAlex.

  1. The inheritance of groin hernias: an updated systematic review with meta-analyses.Hernia : the journal of hernias and abdominal wall surgery · 2023
    Pooled it
  2. Pooled it
  3. Article
  4. Circulating Biomarkers as Potential Risk Factors for Inguinal Hernia.International journal of molecular sciences · 2025
    Article
  5. Article
  6. Article
  7. Study on the Relationship between MMP-2, MMP-9 Gene Polymorphisms, and the Risk of Colorectal Cancer.Evidence-based complementary and alternative medicine : eCAM · 2022
    Article
  8. Article
  9. 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

5 authors at 3 institutions in 1 country.

Dianchen WangDepartment of Hernia and Abdominal Wall Surgery, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe Road, Zhengzhou, 450052, Henan, China. wdc8681949@163.com.
Yuqian HanDepartment of General Surgery, The First Affiliated Hospital of Henan University of CM, No. 19 Renmin Road, Zhengzhou, 450001, Henan, China.
Xiuli XuDepartment of General Surgery, The Third Affiliated Hospital of Henan University of CM, No. 63 Dongming Road, Zhengzhou, 450001, Henan, China.
Jianmin ChenDepartment of Hernia and Abdominal Wall Surgery, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe Road, Zhengzhou, 450052, Henan, China.
Yake ChenDepartment of Hernia and Abdominal Wall Surgery, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe Road, Zhengzhou, 450052, Henan, China.
First Affiliated Hospital of Zhengzhou University · CNFirst Affiliated Hospital of Henan University · CNHenan University · CN

Funding

Scientific and Technological Development Project of Henan Province in 2017 172102310274
6 · The paper itself

Abstract

backgroundThe development of inguinal hernia might be related with collagen metabolism, which was regulated by matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs). The aim of this study was to evaluate the mRNA and protein expression levels of MMP-2 and TIMP-2 in anterior rectus sheath fascia to investigate the function of them in inguinal hernia formation.

methodsThe study enrolled 48 primary inguinal hernia patients: 32 participants had indirect inguinal hernia and 16 patients suffered direct inguinal hernia. Specimens were taken from the anterior rectus sheath fascia. The amounts of MMP-2 mRNA and TIMP-2 mRNA were evaluated by real-time fluorescence quantitative polymerase chain reaction (RT-PCR), and immunohistochemistry was performed to assess the protein expression of them.

resultsThe mRNA and protein expression levels of MMP-2 in direct group were significantly higher than those of control group (P < 0.05) and indirect group (P < 0.05), while the expression levels of TIMP-2 in direct group were significantly lower than those of control group (P < 0.05) and indirect group (P < 0.05). The ratio of MMP-2 mRNA/TIMP-2 mRNA in direct group was significantly higher than that of control group (P < 0.05) and indirect group (P < 0.05), and the ratio of indirect group was significantly higher than that of control group (P < 0.05). According to receiver operating characteristic (ROC) curve, MMP-2/TIMP-2 can diagnose direct hernia from controls with area under the curve (AUC) of 0.950 and indirect hernia with AUC of 0.730 effectively.

conclusionsElevated level of MMP-2 and decreased level of TIMP-2 may play a role in direct inguinal hernia development. The ratio of MMP-2/TIMP-2 may be useful in identification of direct hernia.

Indexed as

Matrix Metalloproteinase 2Tissue Inhibitor of Metalloproteinase-2Hernia, InguinalHumansMatrix Metalloproteinase 2MMP2 protein, humanTIMP2 protein, humanTissue Inhibitor of Metalloproteinase-2

Identifiers

PMID32623572
OpenAlexW3038214695

What OpenQuestion holds

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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.