Gut microbiome in gastrointestinal neoplasms: from mechanisms to precision therapeutic strategies
Abstract
The incidence of Gastrointestinal Neoplasms (GI neoplasms) continues to increase globally. Colorectal cancer (CRC), in particular, has emerged as the second leading cause of cancer-related mortality worldwide. Now, Specific pathogenic bacteria, such as Fusobacterium nucleatum (F. nucleatum) and Helicobacter pylori (H. pylori), critically promote tumorigenesis through multiple mechanisms, including the induction of genotoxic damage, host metabolic reprogramming, and remodeling of the tumor immune microenvironment. Notably, a dysbiotic Gut Microbiome (GM) state significantly compromises patient response rates to cancer therapeutics. This review aims to systematically analyze the core molecular mechanism of GM affecting tumor development and explore the precise intervention strategies guided by clinical translation. This systematic review adhered to the PRISMA-2020 guidelines. We conducted a comprehensive literature search in PubMed (2008–2025) using key terms including “Gut Microbiome”, “Gastrointestinal Neoplasms”, “Fecal Microbiota Transplantation (FMT)”, “immunotherapy resistance”, “precision-based interventions”, and “emerging research frontiers”. Preclinical and clinical studies investigating the mechanisms, diagnostic applications, and therapeutic interventions of the GM in GI neoplasms were included. This review systematically elucidates the tripartite mechanisms by which the GM influences the initiation and progression of GI neoplasms. And we innovatively proposed the…
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