Changes in gastric mucosal microbiota in gastric carcinogenesis: a systematic review protocol

IntroductionThe human stomach is a complex and diverse microbial ecosystem. Consecutive alternations of gastric microbiota occur in gastric carcinogenesis, while the changing pattern during this process remains controversial across studies. We aim to identify the changes in the diversity and composi...

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Published in:BMJ open 2021-03, Vol.11 (3), p.e045810
Main Authors: Ji, Ruoyu, Zhao, Xinyu, Cao, Xinyuan, Zhang, Yizhen, Yang, Yingyun
Format: Article
Language:English
Subjects:
Bacteria
bacteriology
Bias
Citation management software
Demographics
Gastric cancer
gastroenterology
Gastroenterology and Hepatology
gastrointestinal tumours
Infections
Microbiota
Patients
Phylogenetics
Researchers
Sample size
Systematic review
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creator Ji, Ruoyu
Zhao, Xinyu
Cao, Xinyuan
Zhang, Yizhen
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description IntroductionThe human stomach is a complex and diverse microbial ecosystem. Consecutive alternations of gastric microbiota occur in gastric carcinogenesis, while the changing pattern during this process remains controversial across studies. We aim to identify the changes in the diversity and composition of gastric mucosal microbiota in gastric tumorigenesis.Methods and analysisWe will search through PubMed, EMBASE and Cochrane databases, as well as conference proceedings and references of review articles for observational articles reporting either the relative abundance of bacteria at the phylum or genus level or at least one of the alpha diversity indexes respectively and clearly in both gastric cancer and non-cancer groups. Selection of studies and data extraction will be performed independently by two researchers. Disagreements will be resolved through discussion. Risk of bias will be assessed using the modified Newcastle-Ottawa Scale. Quantitative analyses will be performed using a random effects model, where the effect measurement will be expressed as the MD.Ethics and disseminationEthical approval for this systematic review is not required, as the study is based exclusively on published documents and will not include any individual data. Findings of this study are expected to be disseminated through peer-reviewed journals or conference proceedings.PROSPERO registration numberCRD42020206973.
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subjects Bacteria
bacteriology
Bias
Citation management software
Demographics
Gastric cancer
gastroenterology
Gastroenterology and Hepatology
gastrointestinal tumours
Infections
Microbiota
Patients
Phylogenetics
Researchers
Sample size
Systematic review
title Changes in gastric mucosal microbiota in gastric carcinogenesis: a systematic review protocol
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