Cinnamaldehyde microcapsules enhance bioavailability and regulate intestinal flora in mice

Area of Science:

• Pharmacology and Toxicology
• Microbiology
• Nutritional Science

Background:

• Cinnamaldehyde is a natural compound with potential health benefits.
• Its bioavailability and effects on gut microbiota are not fully understood.
• Microencapsulation is a technique to improve compound delivery and stability.

Purpose of the Study:

• To evaluate the effects of microencapsulated cinnamaldehyde on cinnamaldehyde pharmacokinetics.
• To assess the impact on antioxidant capacity and intestinal flora in mice.
• To determine if microencapsulation enhances cinnamaldehyde bioavailability.

Main Methods:

• Oral administration of cinnamaldehyde microcapsules to male C57/BL6 mice for 7 weeks.
• Measurement of cinnamaldehyde and its metabolites in plasma, urine, and feces.
• Assessment of antioxidant capacity in liver, duodenum, and colon.
• 16S rRNA gene sequencing for gut microbial analysis.
• Quantification of short-chain fatty acids, including butyric acid, in feces.

Main Results:

• Microencapsulation significantly increased plasma concentrations of cinnamaldehyde and its metabolites.
• Excretion of cinnamaldehyde metabolites in urine and feces was reduced post-microencapsulation.
• Improved antioxidant capacity was observed in the liver, duodenum, and colon.
• Gut microbial richness and diversity were enhanced, with notable shifts in bacterial genera.
• Increased abundance of beneficial bacteria like Bacteroides and Lactobacillus, and elevated butyric acid levels in feces.

Conclusions:

• Microencapsulated cinnamaldehyde demonstrates enhanced bioavailability compared to non-encapsulated forms.
• The microencapsulation strategy positively modulates the gut microbiota composition and function.
• Microencapsulated cinnamaldehyde exhibits antioxidant properties and may regulate intestinal flora balance.