Epilactose as a Promising Butyrate-Promoter Prebiotic via Microbiota Modulation.

Area of Science:

• Microbiology
• Nutritional Science
• Gastroenterology

Background:

• Epilactose is an emerging prebiotic composed of galactose and mannose.
• Prebiotics modulate gut microbiota and offer health benefits.
• Understanding epilactose's prebiotic potential is crucial for functional food development.

Purpose of the Study:

• To evaluate the prebiotic potential of epilactose in vitro.
• To compare epilactose's effects with established prebiotics like lactulose and raffinose.
• To investigate epilactose's impact on gut microbiota composition and metabolite production.

Main Methods:

• In vitro fermentation of epilactose using human fecal inocula from Mediterranean (DM) and Vegan (DV) diet followers.
• Analysis of microbial metabolites including lactate, short-chain fatty acids (SCFAs), and gases.
• Microbiota profiling to identify changes in bacterial populations, particularly butyrate producers.

Main Results:

• Epilactose fermentation confirmed prebiotic properties through the production of lactate, SCFAs, and gases.
• Epilactose significantly stimulated butyrate-producing bacteria in both DM and DV donors.
• Butyrate production was substantially higher with epilactose compared to lactulose and raffinose (e.g., 70-fold increase for DM donor vs. lactulose).

Conclusions:

• Epilactose demonstrates significant prebiotic potential, effectively promoting butyrate-producing bacteria.
• The prebiotic effect of epilactose appears to be independent of the donor's dietary background (DM vs. DV).
• Epilactose shows promise as a functional ingredient for enhancing gut health through increased butyrate production.