Bioactive compounds produced by gut microbial tannase: implications for colorectal cancer development

Area of Science:

• Microbiology
• Gastroenterology
• Oncology

Background:

• The human gut microbiome significantly influences host health through metabolite production.
• Gallic acid (GA) and pyrogallol (PG) possess anti-carcinogenic properties but are scarce in diets.
• Colorectal cancer (CRC) is associated with gut dysbiosis, with distinct microbial profiles in tumorous tissues.

Purpose of the Study:

• To review the gut microbiome composition in colorectal cancer (CRC) patients.
• To identify key microbial functions, such as tannase activity, associated with CRC tumor tissues.
• To explore the implications of microbial tannin metabolism for CRC development.

Main Methods:

• Review of recent studies on gut microbiome in CRC patients using next-generation sequencing.
• Analysis of bacterial species and their functional genes colonizing tumorous versus non-tumorous tissues.
• Synthesis of information on the anti-carcinogenic roles of GA and PG.

Main Results:

• Specific bacterial species with tannase activity are selectively enriched in tumorous tissues of CRC patients.
• Tannase is a key gene function associated with bacteria colonizing CRC tissues.
• GA and PG, produced by tannin-degrading bacteria, have demonstrated anti-cancer effects.

Conclusions:

• The presence of tannase-producing bacteria in CRC tumors suggests a potential role in disease progression or modulation.
• Microbial generation of anti-carcinogenic compounds like GA and PG in the gut presents an intriguing link to CRC.
• Further research is warranted to understand the precise consequences of this microbial metabolic activity in CRC development.