Evidence map›Paper›PMID 25098926›Full record

ArticleGastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association2015

Robust quantitative assessments of cytosine modifications and changes in the expressions of related enzymes in gastric cancer.

Chunping Du, Nobuya Kurabe, Yoshitaka Matsushima, Masako Suzuki, Tomoaki Kahyo, Ippei Ohnishi, Fumihiko Tanioka, Shogo Tajima, Masanori Goto, Hidetaka Yamada and 4 more

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In one paragraph

Article in Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 1 pooled it
2.3field-weighted citation impact, top 12% 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

26 citing papers in PubMed, 1 synthesis or guideline pooled it, 46 citations in OpenAlex.

  1. Pooled it
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  8. mCancer gene therapy · 2022
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  12. Mass spectrometric profiling of DNA adducts in the human stomach associated with damage from environmental factors.Genes and environment : the official journal of the Japanese Environmental Mutagen Society · 2021
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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

14 authors at 4 institutions in 2 countries.

Chunping DuDepartment of Tumor Pathology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi Ward, Hamamatsu, Shizuoka, 431-3192, Japan.
Nobuya Kurabe
Yoshitaka Matsushima
Masako Suzuki
Tomoaki Kahyo
Ippei Ohnishi
Fumihiko Tanioka
Shogo Tajima
Masanori Goto
Hidetaka Yamada
Hong Tao
Kazuya Shinmura
Hiroyuki Konno
Haruhiko Sugimura
Hamamatsu University · JPHamamatsu University School of Medicine · JPIwata City Hospital · JPNational Cancer Research Institute · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe rediscovery of 5-hydroxymethylcytosine, the ten-eleven translocation (TET) family, thymine-DNA glycosylase (TDG) and isocitrate dehydrogenase (IDH) have opened new avenues in the study of DNA demethylation pathways in gastric cancer (GC). We performed a comprehensive and robust analysis of these genes and modified cytosines in gastric cancer.

methodsLiquid chromatography mass spectrometry/mass spectrometry (LC-MS/MS) was used to assess 5-methyldeoxycytidine (5-mC), 5-hydroxymethyldeoxycytidine (5-hmC), 5-formyldeoxycytidine (5-fC) and 5-carboxyldeoxycytidine (5-caC) quantitatively in tumorous and non-tumorous regions of GCs; [D2]-5-hmC was used as an internal standard. Expression levels of the genes TET1, TET2, TET3, TDG, IDH1 and IDH2 were measured using a real-time reverse transcription polymerase chain reaction (RT-PCR) and were compared to the clinical attributes of each case. Using HEK293T cells the effects of introducing plasmids containing full-length TET1, TET2, and TET3 and 7 variants of the TET2 catalytic domain were evaluated in terms of their effect on cytosine demethylation.

resultsLC-MS/MS showed that 5-hmC was significantly decreased in tumorous portions. 5-mC was also moderately decreased in tumors, while 5-fC and 5-caC were barely detectable. The expressions of TET1, TET2, TET3, TDG and IDH2, but not IDH1, were notably decreased in GCs, compared with the adjacent non-tumor portion. TET1 expression and the 5-hmC levels determined using LC-MS/MS had a significantly positive correlation and TET1 protein had a greater effect on the increase in 5-hmC than TET2 and TET3 in HEK293T cells.

conclusionsThe loss of 5-hmC and the down-regulation of TET1-3, TDG and IDH2 were found in GCs. The loss of 5-hmC in GCs was mainly correlated with the down-regulation of TET1.

Indexed as

5-MethylcytosineAgedChromatography, LiquidCytosineDeoxycytidineDioxygenasesDNA-Binding ProteinsEnzymesFemaleGene Expression Regulation, NeoplasticHEK293 CellsHumansIsocitrate DehydrogenaseMaleMiddle AgedMixed Function Oxygenases5-formyl-2'-deoxycytidine5-hydroxymethyl-2'-deoxycytidine5-hydroxymethylcytosine5-Methylcytosine5-methyldeoxycytidineCytosineDeoxycytidineDioxygenasesDNA-Binding ProteinsEnzymesIDH1 protein, humanIDH2 protein, humanIsocitrate DehydrogenaseMixed Function OxygenasesProto-Oncogene ProteinsTET1 protein, humanTET2 protein, humanTET3 protein, human

Identifiers

PMID25098926
OpenAlexW2095607598

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.