Evidence map›Paper›PMID 33788008›Full record

ArticleHernia : the journal of hernias and abdominal wall surgery2022

Characterization of innate and adaptive immune cells involved in the foreign body reaction to polypropylene meshes in the human abdomen.

A Dievernich, P Achenbach, L Davies, U Klinge

Abstract read
In one paragraph

Article in Hernia : the journal of hernias and abdominal wall surgery, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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, 2 syntheses or guidelines pooled it.

  1. Autoimmunity and hernia mesh: fact or fiction?Hernia : the journal of hernias and abdominal wall surgery · 2023
    Pooled it
  2. Cyanoacrylate glue reactions: A systematic review, cases, and proposed mechanisms.Journal of vascular surgery. Venous and lymphatic disorders · 2023
    Pooled it
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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

4 authors.

A DievernichDepartment of General, Visceral and Transplant Surgery, RWTH Aachen University Hospital, Pauwelsstraße 30, 52074, Aachen, Germany. adievernich@web.de.ORCID http://orcid.org/0000-0001-6677-9801
P AchenbachInstitute of Neuropathology, RWTH Aachen University Hospital, Aachen, Germany.
L DaviesDivision of Infection and Immunity, Cardiff University, Cardiff, UK.
U KlingeDepartment of General, Visceral and Transplant Surgery, RWTH Aachen University Hospital, Pauwelsstraße 30, 52074, Aachen, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPolypropylene (PP) mesh is widely used to reinforce tissues. The foreign body reaction (FBR) to the implant is dominated by innate immune cells, especially macrophages. However, considerable numbers of adaptive immune cells, namely T cells, have also been regularly observed, which appear to play a crucial role in the long-term host response.

methodsThis study investigated the FBR to seven human PP meshes, which were removed from the abdomen for recurrence after a median of one year. Using immunofluorescence microscopy, the FBR was examined for various innate (CD11b

resultsT-helper cells (19%) and regulatory T-cells (25%) were present at comparable rates to macrophages, and clustered significantly toward the mesh fibers. For all cell types the lowest proportions of "conventional" cells (< 60%) were observed at the mesh-tissue interface, but increased considerably at about 50-100 µm, indicating reduced stimulation with rising distance to the mesh fibers.

conclusionBoth innate and adaptive immune cells participate in the chronic FBR to PP meshes with T cells and macrophages being the predominant cell types, respectively. In concordance with the previous data, many cells presented a "hybrid" pattern near the mesh fibers. The complexity of the immune reaction seen within the foreign body granuloma may explain why approaches focusing on specific cell types have not been very successful in reducing the chronic FBR.

Indexed as

PolypropylenesSurgical MeshAbdomenForeign-Body ReactionHerniorrhaphyHumansPolypropylenesAdaptive immune systemFluorescence microscopyForeign body reactionInnate immune systemMesh

Identifiers

PMID33788008
PMCPMC8881270

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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.