Evidence map›Paper›PMID 15951534›Full record

ArticleGut2005

Expression of carbonic anhydrase 9 at the invasion front of gastric cancers.

J Chen, C Röcken, J Hoffmann, S Krüger, U Lendeckel, A Rocco, S Pastorekova, P Malfertheiner, M P A Ebert

Open access · bronzeAbstract read
In one paragraph

Article in Gut, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed, 1 pooled it
1.8field-weighted citation impact, top 17% 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

44 citing papers in PubMed, 1 synthesis or guideline pooled it, 86 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Article
  4. Article
  5. Article
  6. Review
  7. Carbonic Anhydrases II and IX in Non-ampullary Duodenal Adenomas and Adenocarcinoma.The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society · 2021
    Article
  8. Article
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  13. Carbonic anhydrases II, IX, and XII in Barrett's esophagus and adenocarcinoma.Virchows Archiv : an international journal of pathology · 2018
    Article
  14. Article
  15. Network Pharmacology-Based Approach to Investigate the Mechanisms ofEvidence-based complementary and alternative medicine : eCAM · 2018
    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

9 authors at 2 institutions in 2 countries.

J ChenDepartment of Gastroenterology, Hepatology, and Infectious Diseases, Otto-von-Guericke-University, Leipziger Str 44, D-39120 Magdeburg, Germany.
C Röcken
J Hoffmann
S Krüger
U Lendeckel
A Rocco
S Pastorekova
P Malfertheiner
M P A Ebert
Otto-von-Guericke University Magdeburg · DEBiomedical Research Center of the Slovak Academy of Sciences · SK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCarbonic anhydrase IX (MN/Ca9) catalyses the reversible metabolism of carbon dioxide to carbonic acid and has also been linked to malignant transformation and hypoxia in various cancers.

aimsTo assess the expression and biological role of Ca9 in gastric cancer.

methodsUsing gastric cancer cell lines and tissues, we studied expression of Ca9 by western blot analysis, immunohistochemistry, and polymerase chain reaction. Biological changes after Ca9 transfection and after treatment with 5'-azadeoxycytidine were also analysed in cancer cell lines.

resultsNon-cancerous tissues strongly expressed Ca9 with membranous localisation. In contrast, Ca9 expression was frequently lost in gastric cancers (p<0.001). However, gastric cancers that retained Ca9 expression in cancer cells exhibited a shorter postoperative survival (p = 0.028). In vitro analysis revealed that loss of Ca9 expression in gastric cancer cell lines was restored after treatment with 5'-azadeoxycytidine and was associated with increased invasion (p<0.01). Moreover, AGS cells transfected with Ca9 exhibited significantly increased cell proliferation (p<0.05).

conclusionsA subgroup of gastric cancers retain Ca9 expression in cancer cells at the invasion front. While loss of Ca9 expression is regulated in part by methylation, re-expression of Ca9 is associated with increased invasion, supporting the hypothesis that increased Ca9 expression may contribute to invasion and thus advanced disease and tumour progression in a subset of gastric cancers.

Indexed as

AdultAgedAged, 80 and overAntigens, NeoplasmBiomarkers, TumorBlotting, WesternCarbonic Anhydrase IXCarbonic AnhydrasesCell ProliferationFemaleHumansIsoenzymesMaleMethylationMiddle AgedNeoplasm InvasivenessAntigens, NeoplasmBiomarkers, TumorCA9 protein, humanCarbonic Anhydrase IXCarbonic AnhydrasesIsoenzymesNeoplasm Proteins

Identifiers

PMID15951534
PMCPMC1774603
OpenAlexW1998122056

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.