Evidence map›Paper›PMID 23771433›Full record

ArticleJournal of gastroenterology2014

xCT, component of cysteine/glutamate transporter, as an independent prognostic factor in human esophageal squamous cell carcinoma.

Atsushi Shiozaki, Daisuke Iitaka, Daisuke Ichikawa, Shingo Nakashima, Hitoshi Fujiwara, Kazuma Okamoto, Takeshi Kubota, Shuhei Komatsu, Toshiyuki Kosuga, Hiroki Takeshita and 5 more

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In one paragraph

Article in Journal of gastroenterology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 1 pooled it
0.9field-weighted citation impact, top 27% 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

33 citing papers in PubMed, 1 synthesis or guideline pooled it, 51 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Review
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  5. Review
  6. Article
  7. Article
  8. Review
  9. Article
  10. Role of ferroptosis in esophageal cancer and corresponding immunotherapy.World journal of gastrointestinal oncology · 2023
    Review
  11. Article
  12. Article
  13. The putative role of gut microbiota in cancer: Cysteine is a pivotal coin.Frontiers in gastroenterology (Lausanne, Switzerland) · 2022
    Review
  14. Article
  15. Review
  16. System XcInvestigational new drugs · 2021
    Review
  17. Article
  18. Review
  19. Interaction between RAS gene and lipid metabolism in cancer.Zhejiang da xue xue bao. Yi xue ban = Journal of Zhejiang University. Medical sciences · 2021
    Article
  20. 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

15 authors at 1 institution in 1 country.

Atsushi ShiozakiDivision of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan, shiozaki@koto.kpu-m.ac.jp.
Daisuke Iitaka
Daisuke Ichikawa
Shingo Nakashima
Hitoshi Fujiwara
Kazuma Okamoto
Takeshi Kubota
Shuhei Komatsu
Toshiyuki Kosuga
Hiroki Takeshita
Hiroki Shimizu
Yoshito Nako
Hisami Sasagawa
Mitsuo Kishimoto
Eigo Otsuji
Kyoto Prefectural University of Medicine · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundxCT is a component of the cysteine/glutamate transporter, which plays a key role in glutathione synthesis. The objectives of the present study were to investigate the role of xCT in the regulation of genes involved in cell cycle progression and the clinicopathological significance of its expression in esophageal squamous cell carcinoma (ESCC).

methodsxCT expression in human ESCC cell lines was analyzed by Western blotting and immunofluorescent staining. Knockdown experiments were conducted with xCT siRNA, and the effect on cell cycle was analyzed. The cells' gene expression profiles were analyzed by microarray analysis. An immunohistochemical analysis of 70 primary tumor samples obtained from ESCC patients that had undergone esophagectomy was performed.

resultsxCT was highly expressed in TE13 and KYSE170 cells. In these cells, the knockdown of xCT using siRNA inhibited G1-S phase progression. Microarray analysis identified 1652 genes whose expression levels in TE13 cells were altered by the knockdown of xCT. Pathway analysis showed that the top-ranked canonical pathway was the G1/S checkpoint regulation pathway, which involves TP53INP1, CDKN1A, CyclinD1/cdk4, and E2F5. Immunohistochemical staining showed that xCT is mainly found in the nuclei of carcinoma cells, and that its expression is an independent prognostic factor.

conclusionsThese observations suggest that the expression of xCT in ESCC cells might affect the G1/S checkpoint and impact on the prognosis of ESCC patients. As a result, we have a deeper understanding of the role played by xCT as a mediator and/or biomarker in ESCC.

Indexed as

Gene Expression Regulation, NeoplasticAmino Acid Transport System y+Blotting, WesternCarcinoma, Squamous CellCell Line, TumorEsophageal NeoplasmsEsophageal Squamous Cell CarcinomaG1 Phase Cell Cycle CheckpointsGene Expression ProfilingGene Knockdown TechniquesHumansMicroarray AnalysisPrognosisRNA, Small InterferingS Phase Cell Cycle CheckpointsAmino Acid Transport System y+RNA, Small InterferingSLC7A11 protein, human

Identifiers

PMID23771433
OpenAlexW1975803898

What OpenQuestion holds

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Registered trials

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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.