Evidence map›Paper›PMID 25666316›Full record

ArticleDigestive diseases and sciences2015

Inverse expression of prostaglandin E2-related enzymes highlights differences between diverticulitis and inflammatory bowel disease.

Liying Dai, Denis W King, D Shevy Perera, David Z Lubowski, Elizabeth Burcher, Lu Liu

Abstract readComparative Study
PubMed Publisher
In one paragraph

Article in Digestive diseases and sciences, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
2.2field-weighted citation impact, top 13% 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

16 citing papers in PubMed, 1 synthesis or guideline pooled it, 35 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. A novelFrontiers in immunology · 2026
    Article
  4. Review
  5. Article
  6. Review
  7. Microbiota Composition in Diverticular Disease: Implications for Therapy.International journal of molecular sciences · 2022
    Review
  8. Review
  9. Article
  10. Dietary intake of walnut preventedJournal of clinical biochemistry and nutrition · 2021
    Article
  11. Article
  12. Diverticular Disease in the Elderly.Current gastroenterology reports · 2019
    Review
  13. Article
  14. Review
  15. Article
  16. COX-1/PGEScientific reports · 2017
    Article
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

6 authors at 2 institutions in 1 country.

Liying DaiDepartment of Pharmacology, School of Medical Sciences, UNSW Australia, Sydney, NSW, 2052, Australia.
Denis W King
D Shevy Perera
David Z Lubowski
Elizabeth Burcher
Lu Liu
St George Hospital · AUUNSW Sydney · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundProstaglandin E2 (PGE2) is the dominant prostaglandin in the colon and is associated with colonic inflammation. PGE2 levels are regulated not only by cyclooxygenases (COX-1 and COX-2) but also by 15-hydroxyprostaglandin dehydrogenase (15-PGDH), the major PGE2-degrading enzyme. Information about the involvement of 15-PGDH in colonic inflammation is sparse.

aimWe thus aimed to determine the gene expression and immunoreactivity (IR) of COX-1, COX-2, and 15-PGDH in colonic mucosa from patients with diverse inflammatory disorders: ulcerative colitis (UC), Crohn's disease (CD), and acute diverticular disease (DD).

methodsRNA from human colonic mucosa was extracted and assessed for gene expression by real-time PCR. Intact colon sections were processed for immunohistochemistry with immunostaining of the mucosal areas quantified using ImageJ.

resultsIn colonic mucosa of both UC and CD, COX-2 mRNA and COX-2-IR were significantly increased, whereas 15-PGDH mRNA and 15-PGDH-IR were significantly reduced. In macroscopically undamaged acute DD mucosa, the opposite findings were seen: for both gene expression and immunoreactivity, there was a significant downregulation of COX-2 and upregulation of 15-PGDH. COX-1 mRNA and COX-1-IR remained unchanged in all diseases.

conclusionsOur study for the first time demonstrated differential expression of the PGE2-related enzymes COX-2 and 15-PGDH in colonic mucosa from UC, CD, and acute DD. The reduction of 15-PGDH in IBD provides an additional mechanism for PGE2 increase in IBD. With respect to DD, alterations of PGE2-related enzymes suggest that a low PGE2 level may precede the onset of inflammation, thus providing new insight into the pathogenesis of DD.

Indexed as

AdultAgedAged, 80 and overCase-Control StudiesColitis, UlcerativeColonCrohn DiseaseCyclooxygenase 1Cyclooxygenase 2DinoprostoneDiverticulosis, ColonicFemaleGene Expression Regulation, EnzymologicHumansHydroxyprostaglandin DehydrogenasesIntestinal Mucosa15-hydroxyprostaglandin dehydrogenaseCyclooxygenase 1Cyclooxygenase 2DinoprostoneHydroxyprostaglandin DehydrogenasesPTGS1 protein, humanPTGS2 protein, humanRNA, Messenger

Identifiers

PMID25666316
OpenAlexW1974118718

What OpenQuestion holds

Textmetadata
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.