Xanthohumol does not affect the composition of rat intestinal microbiota

Area of Science:

• * Biochemistry and Microbiology
• * Gut Microbiome Research

Background:

• * Xanthohumol (XN), a prenylated chalcone found in hops, is recognized for potential health benefits, including antimicrobial properties.
• * Its impact on the intestinal microbiota, a crucial factor in host health, requires clarification.

Purpose of the Study:

• * To investigate the effect of dietary Xanthohumol (XN) exposure on the composition of the rat intestinal microbiota.
• * To determine if XN influences microbial diversity and community structure in the gut.

Main Methods:

• * Rats were administered 100 mg XN/kg body weight daily for 4 weeks.
• * Fecal microbial community composition was analyzed using Polymerase Chain Reaction-Denaturing Gradient Gel Electrophoresis (PCR-DGGE).
• * XN concentration in feces was quantified.

Main Results:

• * Intact XN was detected in rat feces at concentrations up to 2.3 mg/g dry weight.
• * No significant shifts in PCR-DGGE patterns, indicating major changes in microbial community structure, were observed in XN-treated rats compared to controls.
• * A slight decrease in similarity index was noted in both treated and untreated groups, suggesting intraindividual variability as the primary driver of changes.

Conclusions:

• * Dietary Xanthohumol (XN) administration did not substantially alter the overall composition of the rat fecal microbiota.
• * Observed minor variations in microbial patterns are likely due to natural intraindividual fluctuations rather than XN's direct effect.
• * XN treatment led to a significant increase in fecal water content.