Mucosal microbiome dysbiosis in gastric carcinogenesis

By O. Coker, Zhenwei Dai, Y. Nie, Gui-jun Zhao, Lei Cao, Geicho Nakatsu, William K. K. Wu, S. Wong, Zigui Chen, J. Sung and 1 more. Gut, 2017

612 citations recorded by the source corpus.

Objectives We aimed to characterise the microbial changes associated with histological stages of gastric tumourigenesis. Design We performed 16S rRNA gene analysis of gastric mucosal samples from 81 cases including superficial gastritis (SG), atrophic gastritis (AG), intestinal metaplasia (IM) and gastric cancer (GC) from Xi’an, China, to determine mucosal microbiome dysbiosis across stages of GC. We validated the results in mucosal samples of 126 cases from Inner Mongolia, China. Results We observed significant mucosa microbial dysbiosis in IM and GC subjects, with significant enrichment of 21 and depletion of 10 bacterial taxa in GC compared with SG (q<0.05). Microbial network analysis showed increasing correlation strengths among them with disease progression (p<0.001). Five GC-enriched bacterial taxa whose species identifications correspond to Peptostreptococcus stomatis, Streptococcus anginosus, Parvimonas micra, Slackia exigua and Dialister pneumosintes had significant centralities in the GC ecological network (p<0.05) and classified GC from SG with an area under the receiver-operating curve (AUC) of 0.82. Moreover, stronger interactions among gastric microbes were observed in Helicobacter pylori-negative samples compared with H. pylori-positive samples in SG and IM. The fold changes of selected bacteria, and strengths of their interactions were successfully validated in the Inner Mongolian cohort, in which the five bacterial markers distinguished GC from SG with an AUC of 0.81. Conclusions In addition to microbial compositional changes, we identified differences in bacterial interactions across stages of gastric carcinogenesis. The significant enrichments and network centralities suggest potentially important roles of P. stomatis, D. pneumosintes, S. exigua, P. micra and S. anginosus in GC progression.

Subfields: Gender Studies, General Health Professions, Law

View Paper: https://www.semanticscholar.org/paper/cb341935050be9c69fce2c8e4f7e63b712660752

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Citations in the corpus

Gastric microbial community profiling reveals a dysbiotic cancer-associated microbiota (2017, background): “32 Reduced microbial diversity has now been recognised as a feature of disease states, including inflammatory diseases and cancer.”
Network analysis methods for studying microbial communities: A mini review (2021, methodology): “…and other studies including identifying biomarkers in of diet and lifestyle [28], interaction between Mucosal microbiome in gastric carcinogenesis [106] etc [107] (cid:1) It was used to capture the interaction between Marine phototrophs and archaea [108] REBACCA (2015) Linear system using log…”