Triterpenoid herbal saponins enhance beneficial bacteria, decrease sulfate-reducing bacteria, modulate inflammatory...

Area of Science:

• Microbiology
• Gastroenterology
• Pharmacology

Background:

• Saponins from medicinal plants show promise in disease prevention.
• Gynostemma pentaphyllum (GpS) contains triterpenoid saponins with potential health benefits.
• The impact of GpS on gut health and tumor prevention requires further investigation.

Purpose of the Study:

• To investigate the effects of GpS on the gut microbiome, mucosal environment, and tumor growth prevention.
• To explore the mechanisms by which GpS exerts its preventive effects on intestinal polyps.

Main Methods:

• ApcMin/+ mice and wild-type littermates were treated with GpS or vehicle for 8 weeks.
• Fecal microbiome analysis was performed using enterobacterial repetitive intergenic consensus (ERIC)-PCR and 16S rRNA gene pyrosequencing.
• Intestinal polyp counts, gut barrier markers (Paneth cells, goblet cells, E-cadherin, N-cadherin), inflammatory cytokines, and macrophage polarization were assessed.

Main Results:

• GpS treatment significantly reduced intestinal polyp formation in ApcMin/+ mice.
• GpS altered the gut microbiome, decreasing sulfate-reducing bacteria and increasing beneficial microbes.
• GpS improved gut barrier function, reduced pro-oncogenic signaling (β-catenin, p-Src, p-STAT3), and shifted the inflammatory profile towards M2 macrophages.

Conclusions:

• GpS exhibits cancer preventive effects by modulating the gut microbiome and improving the intestinal mucosal environment.
• GpS alleviates gut inflammation and promotes tissue repair, potentially through altering cytokine profiles and macrophage polarization.
• GpS represents a promising natural compound for preventing intestinal tumors and managing gut health.