Gut microbiota-dependent anti-obesity mechanisms of Pu-erh tea polysaccharides: a comparative study of raw and ripened forms

Summary

This comparative study characterised raw and ripened Pu-erh tea polysaccharides and demonstrated that both alleviate obesity in mice, but through distinct gut microbiota-dependent mechanisms. Ripened Pu-erh tea polysaccharides more effectively improved glucose and lipid metabolism and reduced inflammation through enrichment of Muribaculaceae, Lachnospiraceae, and Lactobacillaceae, whilst raw Pu-erh tea polysaccharides primarily inhibited adipogenesis via increased Akkermansiaceae. These findings suggest potential for targeted functional food development based on polysaccharide type and individual metabolic needs.

Regional applicability

The study was conducted in mice and does not specify geographic origin of the work. As an in vivo rodent model study, direct application to human populations requires clinical validation. However, if future human trials confirm these mechanisms, Pu-erh tea polysaccharides could be evaluated as a functional food strategy within United Kingdom dietary guidance for obesity and metabolic disease prevention.

Key measures

Weight gain, glucose homeostasis, lipolysis, inflammation markers, gut microbiota composition (16S rRNA sequencing), adipogenesis, lipid metabolism

Outcomes reported

The study characterised the structural composition of raw and ripened Pu-erh tea polysaccharides and evaluated their effects on weight gain, glucose homeostasis, lipid metabolism, and inflammation in high-fat diet-induced obese mice via 16S rRNA sequencing and fecal microbiota transplantation. Distinct gut microbiota-dependent mechanisms were identified for each polysaccharide type.

Supporting research

Tea-derived polysaccharides are explicitly investigated as functional-food mechanisms in diet-induced obese mice.

Limits: Mouse and microbiota evidence cannot establish human anti-obesity efficacy; distinguish correlations from mechanistic intervention findings.

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