Evidence map›Paper›PMID 33362375›Full record

ArticleWorld journal of gastroenterology2020

Alteration of fecal tryptophan metabolism correlates with shifted microbiota and may be involved in pathogenesis of colorectal cancer.

Xi-Zhen Sun, Dong-Yan Zhao, Yuan-Chen Zhou, Qian-Qian Wang, Geng Qin, Shu-Kun Yao

Open access · hybridAbstract read
In one paragraph

Article in World journal of gastroenterology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed, 1 pooled it
2.4field-weighted citation impact, top 10% 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

47 citing papers in PubMed, 1 synthesis or guideline pooled it, 64 citations in OpenAlex.

  1. Colorectal neoplasia-specific amino acid profiles and their diagnostic potential: a systematic review.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2026
    Pooled it
  2. Trial
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Review
  12. Gut microbiota and metabolite changes in metastatic colorectal cancerWorld journal of gastrointestinal oncology · 2025
    Article
  13. Review
  14. Article
  15. Article
  16. Intestinal dysbiosis and colorectal cancer.Chinese medical journal · 2025
    Review
  17. Article
  18. Article
  19. Review
  20. Review
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.

Xi-Zhen SunGraduate School, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China.
Dong-Yan ZhaoGraduate School, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China.
Yuan-Chen ZhouDepartment of Gastroenterology, China-Japan Friendship Hospital, Beijing 100029, China.
Qian-Qian WangPeking University China-Japan Friendship School of Clinical Medicine, Peking University, Beijing 100029, China.
Geng QinDepartment of Gastroenterology, China-Japan Friendship Hospital, Beijing 100029, China.
Shu-Kun YaoDepartment of Gastroenterology, China-Japan Friendship Hospital, Beijing 100029, China. shukunyao@126.com.
China-Japan Friendship Hospital · CNChinese Academy of Medical Sciences & Peking Union Medical College · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGut tryptophan (Trp) metabolites are produced by microbiota and/or host metabolism. Some of them have been proven to promote or inhibit colorectal cancer (CRC)

aimTo investigate the features of Trp metabolism in CRC and the correlation between fecal Trp metabolites and gut microbiota.

methodsSeventy-nine patients with colorectal neoplastic lesions (33 with colon adenoma and 46 with sporadic CRC) and 38 healthy controls (HCs) meeting the inclusion and exclusion criteria were included in the study. Their demographic and clinical features were collected. Fecal Trp, kynurenine (KYN), and indoles (metabolites of Trp metabolized by gut microbiota) were examined by ultraperformance liquid chromatography coupled to tandem mass spectrometry. Gut barrier marker and indoleamine 2,3-dioxygenase 1 (

resultsThe absolute concentration of KYN [1.51 (0.70, 3.46) nmol/g

conclusionAlteration of fecal Trp metabolism mediated by microbiota is associated with intestinal barrier function and tissue Trp metabolism, and may be involved in the pathogenesis of CRC.

Indexed as

Colorectal NeoplasmsGastrointestinal MicrobiomeMicrobiotaAnimalsFecesHumansKynurenineTryptophanKynurenineTryptophanColorectal adenomaColorectal cancerIndolesKynurenineMicrobiotaTryptophan metabolism

Identifiers

PMID33362375
PMCPMC7723673
OpenAlexW3112899518

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.