Evidence map›Paper›PMID 30913125›Full record

ArticleClinical and translational gastroenterology2019

Lipopolysaccharides From Non-Helicobacter pylori Gastric Bacteria Potently Stimulate Interleukin-8 Production in Gastric Epithelial Cells.

Natsumi Miyata, Yoshikazu Hayashi, Shunji Hayashi, Kiichi Sato, Yoshikazu Hirai, Hironori Yamamoto, Kentaro Sugano

Open access · goldAbstract read
In one paragraph

Article in Clinical and translational gastroenterology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
1.5field-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

10 citing papers in PubMed, 19 citations in OpenAlex.

  1. Trial
  2. The influence ofComputational and structural biotechnology journal · 2024
    Review
  3. Crosstalk between3 Biotech · 2023
    Review
  4. Review
  5. Non-Gastro hep advances · 2023
    Article
  6. Review
  7. Article
  8. Review
  9. Effects ofFrontiers in cellular and infection microbiology · 2021
    Article
  10. Observational
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

7 authors at 1 institution in 1 country.

Natsumi MiyataDivision of Gastroenterology, Department of Medicine, School of Medicine, Jichi Medical University, Tochigi, Japan.
Yoshikazu HayashiDivision of Gastroenterology, Department of Medicine, School of Medicine, Jichi Medical University, Tochigi, Japan.
Shunji HayashiDivision of Bacteriology, Department of Infection and Immunity, School of Medicine, Jichi Medical University, Shimotsuke, Japan.
Kiichi SatoDivision of Gastroenterology, Department of Medicine, School of Medicine, Jichi Medical University, Tochigi, Japan.
Yoshikazu HiraiDivision of Bacteriology, Department of Infection and Immunity, School of Medicine, Jichi Medical University, Shimotsuke, Japan.
Hironori YamamotoDivision of Gastroenterology, Department of Medicine, School of Medicine, Jichi Medical University, Tochigi, Japan.
Kentaro SuganoDivision of Gastroenterology, Department of Medicine, School of Medicine, Jichi Medical University, Tochigi, Japan.
Jichi Medical University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGastric acid secretion is compromised in chronic Helicobacter pylori (H. pylori) infection allowing overgrowth of non-H. pylori gastric bacteria (NHGB) in the stomach.

methodsNHGB were isolated from gastric mucosa in selective media and further characterized with biochemical methods and 16S rRNA gene sequencing. Human gastric tissues were studied with indirect immunofluorescence with antibodies against H. pylori and Neisseria subflava (N. subflava). Gastric epithelial cell lines were cocultured with bacteria or incubated with lipopolysaccharides isolated from NHGB, and interleukin-8 released in the media was measured by enzyme-linked immunosorbent assay. Expression of Toll-like receptor (TLR)2, TLR4, it's coreceptor myeloid differentiation factor 2 (MD2), and CD14 in gastric cells was investigated by immunofluorescence microscopy and reverse transcriptase-polymerase chain reaction.

resultsHaemophilus species, Neisseria species, Fusobacterium species, and Veillonella species were predominant Gram-negative bacteria coinfected with H. pylori. Lipopolysaccharides from N. subflava potently stimulated interleukin-8 secretion in MKN45 cells which was cancelled by preincubation with polymyxin B. TLR2, TLR4, CD14, and myeloid differentiation factor 2 were expressed in MKN45 cells, though their levels of expression were low. N. subflava adhered to MKN45 cells in vitro and colocalized with H. pylori in the human gastric mucosa.

conclusionsOur data suggest that N. subflava colonized in the gastric mucosa contribute to gastric inflammation during chronic H. pylori gastritis. TRANSLATIONAL IMPACT: NHGB may perpetuate gastric inflammation and accelerate neoplastic progression in the hypochlorhydric stomach.

Indexed as

Cell LineEpithelial CellsGastric MucosaHelicobacter InfectionsHelicobacter pyloriHumansInterleukin-8Lipopolysaccharide ReceptorsLipopolysaccharidesNeisseriaToll-Like Receptor 2Toll-Like Receptor 4Interleukin-8Lipopolysaccharide ReceptorsLipopolysaccharidesTLR2 protein, humanToll-Like Receptor 2Toll-Like Receptor 4

Identifiers

PMID30913125
PMCPMC6445647
OpenAlexW2925153643

What OpenQuestion holds

Textmetadata
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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.