Evidence map›Paper›PMID 26178482›Full record

ArticleTumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine2015

Prolonged and repetitive exposure to Porphyromonas gingivalis increases aggressiveness of oral cancer cells by promoting acquisition of cancer stem cell properties.

Na Hee Ha, Bok Hee Woo, Da Jeong Kim, Eun Sin Ha, Jeom Il Choi, Sung Jo Kim, Bong Soo Park, Ji Hye Lee, Hae Ryoun Park

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In one paragraph

Article in Tumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 94 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
94citing papers in PubMed, 2 pooled it
4.0field-weighted citation impact, top 5% 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

94 citing papers in PubMed, 2 syntheses or guidelines pooled it, 147 citations in OpenAlex.

  1. Pooled it
  2. Distinct gene expression characteristics in epithelial cell-International journal of medical sciences · 2019
    Pooled it
  3. The prognostic value and molecular mechanisms ofTranslational cancer research · 2026
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  4. Review
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  6. Molecules (Basel, Switzerland) · 2026
    Review
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  8. The Role ofCancers · 2025
    Review
  9. Review
  10. Review
  11. Article
  12. Cancers · 2025
    Review
  13. Review
  14. Review
  15. Article
  16. Review
  17. Review
  18. Article
  19. Article
  20. Review

34 more citing papers are in PubMed but not listed here.

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 1 country.

Na Hee HaDepartment of Oral Pathology, School of Dentistry, Pusan National University, 49 Busandaehak-Ro, Yangsan-Si, Kyeongsangnam-Do, 626-870, South Korea.
Bok Hee WooDepartment of Oral Pathology, School of Dentistry, Pusan National University, 49 Busandaehak-Ro, Yangsan-Si, Kyeongsangnam-Do, 626-870, South Korea.
Da Jeong KimDepartment of Oral Pathology, School of Dentistry, Pusan National University, 49 Busandaehak-Ro, Yangsan-Si, Kyeongsangnam-Do, 626-870, South Korea.
Eun Sin HaDepartment of Oral Pathology, School of Dentistry, Pusan National University, 49 Busandaehak-Ro, Yangsan-Si, Kyeongsangnam-Do, 626-870, South Korea.
Jeom Il ChoiDepartment of Periodontology, School of Dentistry, Pusan National University, 49 Busandaehak-Ro, Yangsan, 626-870, South Korea.
Sung Jo KimDepartment of Periodontology, School of Dentistry, Pusan National University, 49 Busandaehak-Ro, Yangsan, 626-870, South Korea.
Bong Soo ParkDepartment of Oral Anatomy, School of Dentistry, Pusan National University, 49 Busandaehak-Ro, Yangsan, 626-870, South Korea.
Ji Hye LeeDepartment of Oral Pathology, School of Dentistry, Pusan National University, 49 Busandaehak-Ro, Yangsan-Si, Kyeongsangnam-Do, 626-870, South Korea.
Hae Ryoun ParkDepartment of Oral Pathology, School of Dentistry, Pusan National University, 49 Busandaehak-Ro, Yangsan-Si, Kyeongsangnam-Do, 626-870, South Korea. parkhr@pusan.ac.kr.
Pusan National University · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Periodontitis is the most common chronic inflammatory condition occurring in the human oral cavity, but our knowledge on its contribution to oral cancer is rather limited. To define crosstalk between chronic periodontitis and oral cancer, we investigated whether Porphyromonas gingivalis, a major pathogen of chronic periodontitis, plays a role in oral cancer progression. To mimic chronic irritation by P. gingivalis in the oral cavity, oral squamous cell carcinoma (OSCC) cells were infected with P. gingivalis twice a week for 5 weeks. Repeated infection of oral cancer cells by P. gingivalis resulted in morphological changes of host cancer cells into an elongated shape, along with the decreased expression of epithelial cell markers, suggesting acquisition of an epithelial-to-mesenchymal transition (EMT) phenotype. The prolonged exposure to P. gingivalis also promoted migratory and invasive properties of OSCC cells and provided resistance against a chemotherapeutic agent, all of which are described as cellular characteristics undergoing EMT. Importantly, long-term infection by P. gingivalis induced an increase in the expression level of CD44 and CD133, well-known cancer stem cell markers, and promoted the tumorigenic properties of infected cancer cells compared to non-infected controls. Furthermore, increased invasiveness of P. gingivalis-infected OSCC cells was correlated with enhanced production of matrix metalloproteinase (MMP)-1 and MMP-10 that was stimulated by interleukin-8 (IL-8) release. This is the first report demonstrating that P. gingivalis can increase the aggressiveness of oral cancer cells via epithelial-mesenchymal transition-like changes and the acquisition of stemness, implicating P. gingivalis as a potential bacterial risk modifier.

Indexed as

Carcinoma, Squamous CellCell Line, TumorEpithelial-Mesenchymal TransitionGene Expression Regulation, NeoplasticHumansInterleukin-8Matrix Metalloproteinase 1Mouth NeoplasmsNeoplastic Stem CellsPeriodontitisPorphyromonas gingivalisCXCL8 protein, humanInterleukin-8Matrix Metalloproteinase 1MMP1 protein, humanCancer stem cellInterleukin-8InvasionMatrix metalloproteinaseOral cancerPorphyromonas gingivalis

Identifiers

PMID26178482
OpenAlexW1787888625

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.