Evidence map›Paper›PMID 22768227›Full record

ArticlePloS one2012

Breakdown of mucin as barrier to digestive enzymes in the ischemic rat small intestine.

Marisol Chang, Tom Alsaigh, Erik B Kistler, Geert W Schmid-Schönbein

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers.

0numbers the graph read from it
0cells of the map it votes in
58citing papers in PubMed
10.0field-weighted citation impact, top 1% 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

58 citing papers in PubMed, 100 citations in OpenAlex.

  1. Review
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  12. Article
  13. Aging by autodigestion.PloS one · 2024
    Article
  14. Synthetic mucus biomaterials for antimicrobial peptide delivery.Journal of biomedical materials research. Part A · 2023
    Article
  15. Synthetic Mucus Biomaterials for Antimicrobial Peptide Delivery.bioRxiv : the preprint server for biology · 2023
    Article
  16. Review
  17. Review
  18. Article
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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 at 1 institution in 1 country.

Marisol ChangDepartment of Bioengineering, University of California San Diego La Jolla, California, United States of America.
Tom Alsaigh
Erik B Kistler
Geert W Schmid-Schönbein
University of California, San Diego · US

Funding

Digestive Enzymes and Microvascular Inflammation in ShockR01GM085072 · NIGMS · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI SCHMID-SCHOENBEIN, GEERT W. · 2009 to 2017
$2.2M
Hemorrhagic Shock and Pancreatic Enzyme ProductsR01HL076180 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI HOYT, DAVID B. · 2004 to 2007
$1.4M
NHLBI NIH HHS HL76180NHLBI NIH HHS R01 HL076180NIGMS NIH HHS GM85072NIGMS NIH HHS R01 GM085072
6 · The paper itself

Abstract

Loss of integrity of the epithelial/mucosal barrier in the small intestine has been associated with different pathologies that originate and/or develop in the gastrointestinal tract. We showed recently that mucin, the main protein in the mucus layer, is disrupted during early periods of intestinal ischemia. This event is accompanied by entry of pancreatic digestive enzymes into the intestinal wall. We hypothesize that the mucin-containing mucus layer is the main barrier preventing digestive enzymes from contacting the epithelium. Mucin breakdown may render the epithelium accessible to pancreatic enzymes, causing its disruption and increased permeability. The objective of this study was to investigate the role of mucin as a protection for epithelial integrity and function. A rat model of 30 min splanchnic arterial occlusion (SAO) was used to study the degradation of two mucin isoforms (mucin 2 and 13) and two epithelial membrane proteins (E-cadherin and toll-like receptor 4, TLR4). In addition, the role of digestive enzymes in mucin breakdown was assessed in this model by luminal inhibition with acarbose, tranexamic acid, or nafamostat mesilate. Furthermore, the protective effect of the mucin layer against trypsin-mediated disruption of the intestinal epithelium was studied in vitro. Rats after SAO showed degradation of mucin 2 and fragmentation of mucin 13, which was not prevented by protease inhibition. Mucin breakdown was accompanied by increased intestinal permeability to FITC-dextran as well as degradation of E-cadherin and TLR4. Addition of mucin to intestinal epithelial cells in vitro protected against trypsin-mediated degradation of E-cadherin and TLR4 and reduced permeability of FITC-dextran across the monolayer. These results indicate that mucin plays an important role in the preservation of the mucosal barrier and that ischemia but not digestive enzymes disturbs mucin integrity, while digestive enzymes actively mediate epithelial cell disruption.

Indexed as

AcarboseAmylasesAnimalsBenzamidinesCadherinsCell LineDextransDiffusionEpithelial CellsFluorescein-5-isothiocyanateGuanidinesIntestinal MucosaIntestine, SmallIschemiaJejunumMaleAcarboseAmylasesBenzamidinesCadherinsDextransFluorescein-5-isothiocyanatefluorescein isothiocyanate dextranGuanidinesMucinsnafamostatProtein IsoformsTlr4 protein, ratToll-Like Receptor 4Trypsin

Identifiers

PMID22768227
PMCPMC3387149
OpenAlexW1974259421

What OpenQuestion holds

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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.