Gut Microbiota in Colorectal Cancer: Mechanistic Insights, Clinical Strategies, and a Regional Perspective Focused on Sichuan, China
Narrative review outlines proposed mechanisms linking gut microbiota to colorectal carcinogenesis, with a regional focus on Sichuan, China.
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What the study showed
The abstract identifies Fusobacterium nucleatum, Parvimonas micra, and Peptostreptococcus anaerobius as bacterial species repeatedly associated with CRC. Microbial effects described include persistent inflammation, epithelial barrier disruption, metabolite alteration, and epigenetic modulation. Short-chain fatty acids from commensal bacteria are presented as potentially homeostasis-preserving.
How it was done
The study is a narrative review. The abstract does not specify search criteria, databases, or literature coverage period.
Risk of bias
Narrative reviews are prone to selection bias and do not allow quantitative synthesis. The Sichuan regional angle relies on dietary and environmental assumptions not supported by original data in the abstract.
What this study does NOT prove
The review does not demonstrate causality between microbiota alterations and CRC development, nor efficacy of microbiota-based interventions for prevention or treatment.
In clinical practice
Content is exploratory and does not support changes in clinical practice. Bacterial associations with CRC are correlational and should not be interpreted as mechanistically established.
Limitations
Narrative reviews are prone to selection bias and do not allow quantitative synthesis. The Sichuan regional angle relies on dietary and environmental assumptions not supported by original data in the abstract.
Technical appendix
Version history
- 1.0 · 2026-07-22 — Auto-generated under Evidence Standard v1.0
Paid access: structured summary from public metadata; consult the original study at the source.