Changes in the Human Gut Microbiome during Dietary Supplementation with Modified Rice Bran Arabinoxylan Compound

Area of Science:

• Microbiology
• Nutrition Science
• Human Health

Background:

• The gut microbiota plays a crucial role in human health.
• Dietary interventions are explored for modulating gut microbial composition.
• Arabinoxylan compounds derived from rice bran are investigated for their prebiotic potential.

Purpose of the Study:

• To investigate the effects of a modified rice bran arabinoxylan compound (RBAC) on the gut microbiota of healthy adults.
• To assess changes in microbial diversity and taxonomic composition following RBAC supplementation.
• To explore the influence of RBAC dosage and individual factors on gut microbiome modulation.

Main Methods:

• A 21-week study involving 10 healthy adults consuming 1g and 3g of RBAC.
• Faecal samples collected periodically for 16S rRNA sequencing.
• Analysis of alpha and beta diversity using QIIME2, with statistical assessment of individual responses and influencing factors.

Main Results:

• No significant changes in overall alpha or beta diversity were associated with RBAC dosage or duration.
• Participant individuality, diet, and lifestyle significantly impacted gut microbiota diversity (p < 0.05).
• Significant individual taxonomic changes were observed in 7 participants, with 4 identified as RBAC responders.

Conclusions:

• The gut microbiome is highly individualized.
• RBAC supplementation can modulate the gut microbiome, with responses varying based on lifestyle and dietary intake.
• Further research is warranted to understand personalized responses to prebiotic interventions.