Abstract
Background
The second leading mortality cause in the world is cancer, making it a critical issue that impacts human health. As a result, scientists are looking for novel biomarkers for cancer detection. The oral microbiome, made up of approximately 700 species-level taxa, is a significant source for discovering novel biomarkers. In this review, we aimed to prepare a summary of research that has investigated the association between the oral microbiome and gastrointestinal cancers.
Methods
We searched online scientific datasets including Web of Science, PubMed, Scopus, and Google Scholar. Eligibility criteria included human studies that reported abundances of the oral microbiome, or its diagnostic/prognostic performance in patients with gastrointestinal cancers.
Results
Some phyla of the oral microbiome have a relationship with cancers. Some particular phyla of the oral microbiome that may be related to gastrointestinal cancers consist of Firmicutes, Actinobacteria, Bacteroidetes, Proteobacteria, and Fusobacteria. Changes in the abundances of Porphyromonas, Fusobacterium, Prevotella, and Veillonella are correlated with carcinogenesis, and may be used for distinguishing cancer patients from healthy subjects. Oral, colorectal, pancreatic, and esophageal cancers are the most important cancers related to the oral microbiome.
Conclusion
The results of this study may help future research to select bacteria as an early diagnostic or prognostic biomarker of gastrointestinal cancer. Given the current state of our knowledge, additional research is required to comprehend the multiplex processes underlying the role of bacterial microbiota upon cancer progression and to characterize the complex microbiota-host interaction network.
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Availability of Data and Materials
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- WHO:
-
World Health Organization
- MALT:
-
Mucosa-associated lymphoid tissue
- CRC:
-
Colorectal cancer
- MeSH:
-
Medical subject headings
- COPD:
-
Chronic obstructive pulmonary disease
- HOMD:
-
Human oral microbiome database
- HMP:
-
Human Microbiome Project
- MMP:
-
Matrix metalloproteinase
- OSCC:
-
Oral squamous cell carcinoma
- TNF-α:
-
Tumor necrosis factor-α
- HNSCC:
-
Head and neck squamous cell carcinoma
- OPSCC:
-
Oropharyngeal squamous cell carcinoma
- GSCC:
-
Gingival squamous cell carcinoma
- OCC:
-
Oral cavity cancer
- OPC:
-
Oropharyngeal cancer
- EAC:
-
Esophageal adenocarcinoma
- ESCC:
-
Esophageal squamous cell carcinoma
- PDAC:
-
Pancreatic ductal adenocarcinoma
- CA 19–9:
-
Cancer antigen 19–9
- TLR:
-
Toll-like receptor
- AG:
-
Atrophic gastritis
- SG:
-
Superficial gastritis
- AUC:
-
Area under the curve
- ELISA:
-
Enzyme-linked immunosorbent assay
- qPCR:
-
Quantitative polymerase chain reaction
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Pooria Asili: conceptualization, methodology, writing—original draft preparation; Maryam Mirahmad: investigation, writing—original draft preparation; Parisa Rezaei: Writing—Original draft preparation; Seyed Mohammad Tavangar: supervision, writing-reviewing and editing; Mohammad Mahdavi: writing—reviewing and editing; Bagher Larijani: project administration, writing—reviewing and editing; all the authors have read and approved the final manuscript.
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Asili, P., Mirahmad, M., Rezaei, P. et al. The Association of Oral Microbiome Dysbiosis with Gastrointestinal Cancers and Its Diagnostic Efficacy. J Gastrointest Canc 54, 1082–1101 (2023). https://doi.org/10.1007/s12029-022-00901-4
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DOI: https://doi.org/10.1007/s12029-022-00901-4