The evaluation of the quality of Feng Huang Oolong teas and their modulatory effect on intestinal microbiota of high-fat diet-induced obesity mice model

Abstract

The variations in the contents of tea catechins and free amino acids in relation to the quality of Fenghuang Oolong teas (FOT) were determined. It demonstrated that in FOT, which were grown at a high altitude, the contents of methylated estered tea catechins were relatively higher. By human flora-associated (HFA) mice model, the effect of FOT on high-fat diet-induced obesity was investigated by high-throughput sequencing. The shifts in relative abundance of the dominant taxa at the phylum, family and genus levels showed their dramatically effects. A large increase in Bacteroidetes with decrease of Firmicutes was observed after the administration of FOT for 8 weeks. Together, these results suggest that FOT are rich in tea catechins, especially O-methylated tea catechin derivatives, which may be affected by the unique growth environment, and FOT may have prebiotic-like activity and can be used as functional food components in manipulating intestinal microbiota.

Fuzhuan Brick Tea Attenuates High-Fat Diet-Induced Obesity and Associated Metabolic Disorders by Shaping Gut Microbiota

“…Fermented tea, such as oolong, black, and pu’er tea, possessed prebiotic-like activity in manipulating intestinal microbiota and subsequently mediated antiobesity effects and metabolic improvement. − Gao et al proved that pu-erh tea improved the diet-induced metabolic syndrome and reduced obesity by reducing the ratio of F/B and enhancing the populations of Akkermansia muciniphila and Faecalibacterium prausnitzii in rodents. , Likewise, FBT was mainly digested by gut microbiota and exhibited remarkable health-promoting activities. ,, The inhibitory effects of FBT on HFD-induced obesity and metabolic dysfunctions were strongly associated with the regulation of gut microbiota, for instance, stimulating specific commensal organisms, including Lactobacilli and Actinobacteria in high saturated fat diet-fed rats . In our previous studies, we also confirmed the significant regulatory effects of FBT on the diversity of gut microbiota, the ratio of F/B, and the decreases of Erysipelotrichaceae , Coriobacteriaceae , and Streptococcaceae , when investigating the alleviating effects of FBT on obesity. , …”

Citrus maxima and tea regulate AMPK signaling pathway to retard the progress of nonalcoholic fatty liver disease

“…Dark tea extracts increase the serum HDL-C levels in mice and promote fat oxidation by inhibiting the activity of the obesity-related genes in the liver and the adipose tissue (38). The catechins in tea also reduce body fat accumulation by regulating the intestinal microbiota (39). The mechanism of tea in alleviating NAFLD has been previously studied, and it is closely related to AMPK signal activation.…”

Chemistry and Health Effect of Tea Polyphenol (−)-Epigallocatechin 3-O-(3-O-Methyl)gallate

“…Notably, these four cultivars were also suitable for Chinese oolong tea production, and that may be the reason EGCG3″Me was also identified in oolong tea. For example, oolong tea grown in the Phoenix Mountain in Guangdong province, China, was found to enrich EGCG3″Me (≈0.62–1.41%, w/w, dry tea) . Additionally, EGCG3″Me (≈1%, w/w) enriched tea cultivar was also found in Korea, namely, Jangwon No.…”

“…For example, oolong tea grown in the Phoenix Mountain in Guangdong province, China, was found to enrich EGCG3″Me (≈0.62−1.41%, w/w, dry tea). 9 Additionally, EGCG3″Me (≈1%, w/w) enriched tea cultivar was also found in Korea, namely, Jangwon No. 3.…”