Advances of Microbiome in Human Cancers

A special issue of Biomedicines (ISSN 2227-9059). This special issue belongs to the section "Cancer Biology and Oncology".

Deadline for manuscript submissions: closed (30 June 2026) | Viewed by 783

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Guest Editor
Department of Otolaryngology-Head and Neck Surgery, University of California, San Diego, CA 92093, USA
Interests: cancer research; cancer diagnostics; head and neck cancer; microbiome; bioinformatics
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Special Issue Information

Dear Colleagues,

The human microbiome—comprising trillions of bacteria, viruses, fungi, and other microbes residing in and on the body—has emerged as a key player in cancer biology. Once overlooked, it is now recognized for its influence on cancer initiation, progression, and response to therapy through mechanisms involving inflammation, immune modulation, DNA damage, and microbe-host metabolic interaction. Dysbiosis in the gut or tumor-resident microbiotas has been implicated in cancers of the colon, liver, pancreas, and beyond. As the field rapidly evolves, recent challenges related to data reproducibility and methodological consistency have underscored the need for rigorous standards and validation. This Special Issue aims to highlight recent advances in microbiome research related to human cancers, encompassing mechanistic insights and translational applications. We invite studies exploring microbial biomarkers, interactions with cancer therapies, microbiota-targeting interventions, and translational feasibility. Emphasis will also be placed on interdisciplinary approaches, standardization efforts, tumor-resident microbes, and linkage of microbiotas to clinical outcome, with the goal of advancing the microbiome’s clinical utility in oncology.

Dr. Weg M. Ongkeko
Guest Editor

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Keywords

  • human microbiome
  • gut microbiota
  • tumor-resident microbes
  • translational research
  • biomarkers
  • computational biology

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Published Papers (1 paper)

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Review

19 pages, 2865 KB  
Review
The Role of Salivary Microbiota in Pancreatic Cancer: From Screening to Tumor Progression and Treatment Response
by Marco Donatello Delcuratolo, Giovanna Cocomazzi, Viria Beccia, Concetta Panebianco, Elena Binda, Valerio Pazienza and Tiziana Pia Latiano
Biomedicines 2026, 14(6), 1407; https://doi.org/10.3390/biomedicines14061407 - 22 Jun 2026
Viewed by 255
Abstract
Pancreatic cancer (PC) remains one of the malignancies with the most unfavorable prognosis and limited treatment options. The lack of biomarkers for early diagnosis and the asymptomatic nature of the disease contribute to delays in diagnosis and high mortality rates. In recent years, [...] Read more.
Pancreatic cancer (PC) remains one of the malignancies with the most unfavorable prognosis and limited treatment options. The lack of biomarkers for early diagnosis and the asymptomatic nature of the disease contribute to delays in diagnosis and high mortality rates. In recent years, the role of the human microbiota in cancer biology has become increasingly significant, and the oral microbiota in particular has been found to be involved in the pathogenesis and prognosis of several neoplasms. This review summarizes the current evidence relating the salivary microbiota to PC in three key areas: screening and diagnostic potential, pathophysiology and tumor progression, as well as presenting prognostic implications and potential influence on therapy. With regard to early diagnosis, it has been reported that patients with PC have reduced levels of Neisseria elongata (N. elongata) and Streptococcus mitis (S. mitis) and elevated levels of Granulicatella adiacens. Several studies have shown that bacteria present in the saliva can migrate from the oral cavity to pancreatic tissue via hematogenous or enteric routes, where they may actively contribute to tumor development and progression. In particular, it has been shown that Porphyromonas gingivalis (P. gingivalis) and Veillonella atypica (V. atypica) translocate from the mouth to pancreatic tumors, promoting carcinogenesis by inducing a pro-inflammatory tumor microenvironment. Furthermore, some studies have identified certain species associated with prognosis and response to PC treatment. Despite the encouraging results, differences in study methodology, the lack of standardized methods and the scarcity of longitudinal data currently hinder clinical application. Large-scale, multi-omics prospective studies are needed to clarify causality and validate their clinical utility. Overall, the salivary microbiota represents a promising and non-invasive tool for improving early diagnosis, understanding prognosis and enhancing the management of PC. Full article
(This article belongs to the Special Issue Advances of Microbiome in Human Cancers)
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