Evidence map›Paper›PMID 34309194›Full record

ArticleMicrobial biotechnology2021

A newly developed PCR-based method revealed distinct Fusobacterium nucleatum subspecies infection patterns in colorectal cancer.

Dexi Bi, Yin Zhu, Yaohui Gao, Hao Li, Xingchen Zhu, Rong Wei, Ruting Xie, Qing Wei, Huanlong Qin

Open access · goldAbstract read
In one paragraph

Article in Microbial biotechnology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 1 pooled it
1.6field-weighted citation impact, top 16% 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

28 citing papers in PubMed, 1 synthesis or guideline pooled it, 31 citations in OpenAlex.

  1. Pooled it
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  10. The rise and evolving role ofCurrent research in microbial sciences · 2025
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  11. Association ofGut microbiome (Cambridge, England) · 2025
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  12. Microbial manipulators:Journal of oral microbiology · 2025
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  13. Article
  14. Article
  15. Article
  16. Article
  17. Application ofWorld journal of gastrointestinal oncology · 2024
    Article
  18. Article
  19. Article
  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

9 authors at 1 institution in 2 countries.

Dexi Bi *Department of Pathology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China.
Yin Zhu *Department of Gastrointestinal Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China.
Yaohui GaoDepartment of Pathology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China.
Hao LiDepartment of Gastrointestinal Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China.
Xingchen ZhuDepartment of Pathology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China.
Rong WeiDepartment of Pathology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China.
Ruting XieDepartment of Pathology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China.
Qing Wei *Department of Pathology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China.ORCID 0000-0002-9007-5473
Huanlong Qin *Department of Gastrointestinal Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China.
Tongji University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Fusobacterium nucleatum, which has four subspecies (nucleatum, animalis, vincentii and polymorphum), plays an important role in promoting colorectal cancer (CRC). However, as there is no efficient method of differentiating these subspecies in the context of a rich gut microbiota, the compositions in CRC remain largely unknown. In this study, a PCR-based differentiation method enabling profiling of F. nucleatum infection in CRC at the subspecies level was developed. Based on the analysis of 53 F. nucleatum genomes, we identified genetic markers specific to each subspecies and designed primers for the conserved sequences of those markers. The PCR performance of the primers was tested with F. nucleatum and non-nucleatum Fusobacterium strains, and complete consistence with taxonomy was achieved. Additionally, no non-specific amplification occurred when using human DNA. The method was then applied to faecal (n = 58) and fresh-frozen tumour tissue (n = 100) samples from CRC patients, and wide heterogeneity in F. nucleatum subspecies compositions in the gut microbiota among CRC patients was observed. Single-subspecies colonization was common, whereas coexistence of four subspecies was rare. Subspecies animalis was most prevalent, while nucleatum was not frequently detected. The results of this study contribute to our understanding of the pathogenicity of F. nucleatum at the subspecies level and the method developed has potential for clinical and epidemiological use.

Indexed as

Colorectal NeoplasmsGastrointestinal MicrobiomeDNA PrimersFusobacterium nucleatumHumansPolymerase Chain ReactionDNA Primerscolorectal cancerFusobacterium nucleatumgenomicsmicrobiotasubspecies classification

Identifiers

PMID34309194
PMCPMC8449656
OpenAlexW3186603088

What OpenQuestion holds

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LicenceCC BY-NC
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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.