ORIGINAL RESEARCH article
Front. Microbiol.
Sec. Microorganisms in Vertebrate Digestive Systems
Volume 16 - 2025 | doi: 10.3389/fmicb.2025.1591735
This article is part of the Research TopicThe Gut Microbiome's Role in Gastric Cancer: Mechanisms and TherapiesView all 6 articles
Live Bacteria Found in Gastric Cancer Tumor Tissue Bacteria in Gastric Cancer
Provisionally accepted- 1Shandong first medical university, School of Clinical and Basic Medicine, Jinan, China
- 2Quzhou College of Technology, Quzhou, China
Select one of your emails
You have multiple emails registered with Frontiers:
Notify me on publication
Please enter your email address:
If you already have an account, please login
You don't have a Frontiers account ? You can register here
Helicobacter pylori as a causative agent and on the relationship between the microbiota and gastric cancer. There is no direct evidence of bacteria in gastric cancer tissues or their relationship with gastric cancer.Methods: Gastric cancer tissue samples were collected, and the bacteria within tumor tissues were observed by transmission electron microscopy. The bacteria cultured were stained by Gram Staining and then subjected to High-throughput third-generation fulllength 16S rRNA amplicon sequencing. Pure cultures were used to infect AGS gastric cancer cells, followed by protein extraction and Western blotting to detect POF1B protein expression.The bacteria were observed in tumor tissues through transmission electron microscopy and had been cultivated under microaerophilic and anaerobic conditions, specifically, then were identified as Propionibacterium acnes (P. acnes), Klebsiella pneumoniae (K. pneumoniae), and Lactobacillus salivarius (L. salivarius). The vacuolation and mortality of AGS cell infected with P. acnes increased (p < 0.05) and the POF1B protein expression upregulated (p < 0.05).The live bacteria, including L. salivarius, P. acnes, and K. pneumoniae, have been found in gastric cancer tumor tissue. P. acnes specifically upregulate the oncogenic protein POF1B expression. The pathway through which this bacterium enters tumor tissue and its role in the tumor microenvironment require further investigation.
Keywords: gastric cancer, tumor tissue, Bacteria, Propionibacterium acnes, POF1B
Received: 15 Mar 2025; Accepted: 16 May 2025.
Copyright: © 2025 Lv, Song, Zhang, Guo, Zhang, Wang, Hong, Xu, Wang, Lu and Zhao. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Yinghui Zhao, Shandong first medical university, School of Clinical and Basic Medicine, Jinan, China
Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.