Modulation of gut microbiota by fucoxanthin during alleviation of obesity in high-fat diet-fed mice.

Fucoxanthin (Fx), an allenic carotenoid from brown seaweeds or diatoms, has been demonstrated to prevent obesity. Gut dysbiosis and inflammation are two counted important incidence reasons of obesity and related diseases. In this paper, a mouse model induced by high-fat diet (HFD) was used to reveal the role of Fx in modulating intestinal homeostasis and treating obesity. In addition, 16S rRNA sequencing results inferred that Fx alleviated HFD-induced gut microbiota dysbiosis by significantly inhibiting the growth of obesity-/inflammation-related Lachnospiraceae and Erysipelotrichaceae, while promoting the growth of Lactobacillus/Lactococcus, Bifidobacterium, and some butyrate-producing bacteria. The correlation analysis showed that some gut microbiota taxa was strongly correlated with obesity phenotypes and inflammation level. In conclusion, dietary Fx has the potential to alleviate the development of obesity and related symptoms through mediating the composition of gut microbiota as demonstrated in mice. This study provides scientific evidence for the potential effects of fucoxanthin on obesity treatment.