Impact of a water-soluble soy extract on inflammation and gut microbiota in physiologically aged mice.

Abstract

Soy isoflavones are involved deeply in our diet as beneficial to the health. It is known to have anti-inflammatory and antioxidant effects and also to be effective in alleviating various lifestyle diseases, as well as the maintenance of endocrine function especially with age-related diseases such as osteoporosis. Here we investigated the impact of age-dependent changes with the intestinal microbiota in physiologically aged C57BL/6 N by free drinking water with soluble soybean-derived isoflavone glycosides (SIFs) for 4 weeks. Consequently, Akkermansia muciniphila (A. muciniphila) species represented age-dependent increase with SIF treatment, subsequently, generally age-dependent decreased goblet cells are retained in the large intestine. These results invoke that SIF plays a beneficial role on intestinal barrier function to maintain the large intestine homeostasis. Interestingly, we also revealed that SIF had an alleviating effect on age-dependent bone loss. Taken together, SIF has fruitful effect on the intestinal environment and maintenance of homeostasis in physiological aging.