Gut Microbiota-Driven Pathways Linking Chronic Stress to Tumor Progression

Area of Science:

• Oncology
• Microbiology
• Psychoneuroimmunology

Background:

• Chronic stress is a known factor in tumor progression.
• The mechanisms linking stress to cancer are not fully understood.
• The gut microbiota's role as a mediator is an emerging area of research.

Purpose of the Study:

• To review the role of gut microbiota in mediating the effects of chronic stress on tumor progression.
• To summarize mechanisms of stress-induced gut dysbiosis.
• To explore therapeutic strategies targeting the stress-microbiota-cancer axis.

Main Methods:

• Literature review of studies on chronic stress, gut microbiota, and cancer.
• Analysis of mechanisms linking stress, gut dysbiosis, and tumor development.
• Discussion of therapeutic interventions.

Main Results:

• Chronic stress induces gut dysbiosis (reduced diversity, altered microbial composition).
• Stress impacts microbiota via hormones, inflammation, barrier function, and motility.
• Stress-induced dysbiosis promotes cancer via immune suppression, metabolic changes, and inflammation.

Conclusions:

• The gut microbiota is a key mediator between chronic stress and tumor progression.
• Targeting the stress-microbiota-cancer axis with probiotics/prebiotics shows therapeutic potential.
• Modulating the gut microbiome may complement conventional cancer therapies.