Evidence map›Paper›PMID 34344948›Full record

ArticleScientific reports2021

Noxic effects of polystyrene microparticles on murine macrophages and epithelial cells.

Julia Rudolph, Matthias Völkl, Valérie Jérôme, Thomas Scheibel, Ruth Freitag

Abstract read
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 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

25 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  14. Biological Effects of Micro-/Nano-Plastics in Macrophages.Nanomaterials (Basel, Switzerland) · 2025
    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

5 authors.

Julia Rudolph *Department of Biomaterials, Faculty of Engineering Sciences, University of Bayreuth, Bayreuth, Germany.
Matthias Völkl *Department of Process Biotechnology, Faculty of Engineering Sciences, University of Bayreuth, Bayreuth, Germany.
Valérie JérômeDepartment of Process Biotechnology, Faculty of Engineering Sciences, University of Bayreuth, Bayreuth, Germany.ORCID http://orcid.org/0000-0001-6492-2168
Thomas ScheibelDepartment of Biomaterials, Faculty of Engineering Sciences, University of Bayreuth, Bayreuth, Germany. thomas.scheibel@bm.uni-bayreuth.de.ORCID http://orcid.org/0000-0002-0457-2423
Ruth FreitagDepartment of Process Biotechnology, Faculty of Engineering Sciences, University of Bayreuth, Bayreuth, Germany. ruth.freitag@uni-bayreuth.de.ORCID http://orcid.org/0000-0002-6569-9137

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Microplastic (MP) contamination has been identified as an ecological problem with an increasing impact on everyday life. Yet, possible effects of MP at the cellular level are still poorly understood. Here, the interaction of murine macrophages (J774A.1, ImKC) and epithelial cells (STC-1, BNL CL.2) with well-characterized poly(styrene) MP particles (MPP) of varying sizes (0.2-6.0 µm) was studied. Macrophages are expected to actively engulf particles which could be confirmed in this study, while epithelial cells are found in tissues with direct contact with ingested or inhaled MPP. Here, the epithelial cells from both investigated cell lines did not ingest MPP in significant numbers. Concomitantly, no cytotoxic effects nor any influence on cellular proliferation were observed. Cells from the two macrophage cell lines showed high ingestion of MPP of all sizes, but cytotoxic effects were observed only for one of them (ImKC) and only at MPP concentrations above 250 µg/mL. Indications of cellular stress as well as effects on cell proliferation were observed for cell populations with high particle cell interactions.

Indexed as

AnimalsCell CountCell LineCell ProliferationEpithelial CellsMacrophagesMiceMicroplasticsParticle SizePolystyrenesReactive Oxygen SpeciesMicroplasticsPolystyrenesReactive Oxygen Species

Identifiers

PMID34344948
PMCPMC8333329

What OpenQuestion holds

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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.