Short-chain fatty acids in cancer pathogenesis

Area of Science:

• Microbiology
• Immunology
• Oncology
• Metabolomics

Background:

• Cancer represents a shift away from homeostasis, influenced by factors like infections, mutations, diet, and carcinogens.
• Gut bacteria-produced short-chain fatty acids (SCFAs) are crucial for maintaining health and homeostasis.
• Gut dysbiosis, marked by low SCFAs and a leaky gut, is a risk factor for numerous cancer types.

Purpose of the Study:

• To investigate the role of SCFAs in cancer pathogenesis and their potential as a therapeutic agent.
• To elucidate the mechanisms by which SCFAs modulate inflammation and cancer cell proliferation.
• To compare the efficacy and safety of SCFAs with other microbiome-based interventions like probiotics and fecal transplants.

Main Methods:

• Review of existing literature on SCFA production, gut dysbiosis, and cancer.
• Analysis of SCFA's anti-inflammatory mechanisms, including NF-κB inhibition and cytokine modulation.
• Examination of SCFA's epigenetic effects on cancer-related genes and signaling pathways (Wnt, Hedgehog, Hippo, Notch).
• Assessment of SCFA's impact on cancer stem cell proliferation and tumor suppressor gene expression (PTEN, p53).

Main Results:

• SCFAs attenuate inflammation by inhibiting pro-inflammatory pathways and promoting anti-inflammatory cytokines.
• SCFAs exert epigenetic effects, influencing genes and pathways critical to cancer development.
• SCFAs demonstrate selective toxicity towards tumor cells while sparing healthy tissue, and target multiple hallmarks of cancer.
• SCFAs were found to block cancer stem cell proliferation, potentially preventing cancer development or relapse.

Conclusions:

• SCFAs play a significant role in maintaining gut homeostasis and possess anti-cancer properties.
• SCFA administration may offer a safe and effective strategy to delay or prevent various tumor types by re-establishing homeostasis.
• SCFAs present advantages over probiotics and fecal transplants due to their targeted toxicity and ability to modulate key cancer pathways.