Optimal Dietary Ferulic Acid for Suppressing the Obesity-Related Disorders in Leptin-Deficient Obese C57BL/6J-ob/ob Mice
Ferulic acid (FA) is a major polyphenolic compound and has been shown to improve the glucose and lipid homeostasis in high-fat diet-induced obese mice. Here, we found the optimal level of dietary FA to ameliorate obesity and obesity-correlated disorders, and identified the responses of gut microbiota to dietary FA in genetic leptin-deficient obese (ob/ob) mice. The ob/ob mice exhibited persistent higher body weights, feed efficiency, white adipose tissue weights, and hepatic lipid accumulation, compared to those of the wild-type mice. However, 0.5% dietary FA suppressed these symptoms in ob/ob mice. The diversity of gut microbiota and the total abundance of obesity- and anti-obesity-related genera were not influenced after FA intervention in ob/ob mice. These data suggest that sufficient intake of FA (0.5%) could be useful for treating obesity or obesity-related diseases, and this weight-control effect is possibly not correlated with the gut–brain axis.
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