Evidence map›Paper›PMID 34360944›Full record

ArticleInternational journal of molecular sciences2021

An Experimental Workflow for Studying Barrier Integrity, Permeability, and Tight Junction Composition and Localization in a Single Endothelial Cell Monolayer: Proof of Concept.

Maria Bartosova, David Ridinger, Iva Marinovic, Jana Heigwer, Conghui Zhang, Eszter Levai, Jens H Westhoff, Franz Schaefer, Stefan Terjung, Georg Hildenbrand and 5 more

Open access · goldAbstract read
In one paragraph

Article in International journal of molecular sciences, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
1.0field-weighted citation impact, top 25% 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

11 citing papers in PubMed, 16 citations in OpenAlex.

  1. Review
  2. Journal of microbiology and biotechnology · 2026
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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

15 authors at 5 institutions in 3 countries.

Maria BartosovaCenter for Pediatric and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany.ORCID 0000-0003-1127-3453
David RidingerKirchhoff Institute for Physics, Heidelberg University, 69120 Heidelberg, Germany.ORCID 0000-0002-0189-3168
Iva MarinovicCenter for Pediatric and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany.
Jana HeigwerCenter for Pediatric and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany.ORCID 0000-0002-1706-4591
Conghui ZhangCenter for Pediatric and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany.ORCID 0000-0003-4296-4054
Eszter LevaiCenter for Pediatric and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany.ORCID 0000-0002-6149-3254
Jens H WesthoffCenter for Pediatric and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany.ORCID 0000-0002-9837-9383
Franz SchaeferCenter for Pediatric and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany.ORCID 0000-0001-7564-9937
Stefan TerjungEuropean Molecular Biology Laboratory, Advanced Light Microscopy Facility, 69117 Heidelberg, Germany.
Georg HildenbrandKirchhoff Institute for Physics, Heidelberg University, 69120 Heidelberg, Germany.ORCID 0000-0003-1992-6025
Damir KrunicGerman Cancer Research Center, 69120 Heidelberg, Germany.
Felix BestvaterGerman Cancer Research Center, 69120 Heidelberg, Germany.
Michael HausmannKirchhoff Institute for Physics, Heidelberg University, 69120 Heidelberg, Germany.ORCID 0000-0001-9430-1987
Claus Peter SchmittCenter for Pediatric and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany.
Sotirios G ZarogiannisCenter for Pediatric and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany.
Heidelberg University · DEGerman Cancer Research Center · DEEuropean Molecular Biology Laboratory · DESemmelweis University · HUUniversity of Thessaly · GR

Funding

Deutsche Forschungsgemeinschaft 419826430Horizon 2020 812699New National Excellence Program of the Ministry of Human Capacities, Hungary ÚNKP-20-3
6 · The paper itself

Abstract

Endothelial and epithelial barrier function is crucial for the maintenance of physiological processes. The barrier paracellular permeability depends on the composition and spatial distribution of the cell-to-cell tight junctions (TJ). Here, we provide an experimental workflow that yields several layers of physiological data in the setting of a single endothelial cell monolayer. Human umbilical vein endothelial cells were grown on Transwell filters. Transendothelial electrical resistance (TER) and 10 kDa FITC dextran flux were measured using Alanyl-Glutamine (AlaGln) as a paracellular barrier modulator. Single monolayers were immunolabelled for Zonula Occludens-1 (ZO-1) and Claudin-5 (CLDN5) and used for automated immunofluorescence imaging. Finally, the same monolayers were used for single molecule localization microscopy (SMLM) of ZO-1 and CLDN5 at the nanoscale for spatial clustering analysis. The TER increased and the paracellular dextran flux decreased after the application of AlaGln and these functional changes of the monolayer were mediated by an increase in the ZO-1 and CLDN5 abundance in the cell-cell interface. At the nanoscale level, the functional and protein abundance data were accompanied by non-random increased clustering of CLDN5. Our experimental workflow provides multiple data from a single monolayer and has wide applicability in the setting of paracellular studies in endothelia and epithelia.

Indexed as

Capillary PermeabilityClaudin-5DextransHumansHuman Umbilical Vein Endothelial CellsTight JunctionsZonula Occludens-1 ProteinClaudin-5DextransZonula Occludens-1 ProteinAlanyl-Glutamineautomated immunofluorescence imagingcell monolayerclaudinsendothelial cellsparacellular permeabilitysingle molecule localization microscopytight junctionsTranswellZonula Occludens-1

Identifiers

PMID34360944
PMCPMC8347178
OpenAlexW3186148727

What OpenQuestion holds

Textmetadata
LicenceCC BY
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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.