1-Deoxynojirimycin (DNJ) has been known as a potent α-
glucosidase inhibitor from mulberry leaves and considered beneficial in prevention of
type 2 diabetes. Due to limited amount of DNJ in mulberry leaves, recent studies have focused in finding alternative source that can produce higher amount of DNJ. Previously, we produced a high DNJ-containing culture medium from Bacillus amyloliquefaciens AS385 and constructed a concentration method of bacterial culture medium using
cation exchange column. However, less complicated concentration procedure is necessary to save time and cost during the large-scale production. Therefore, we developed a simpler concentration method using
anion exchange resin to yield B. amyloliquefaciens AS385 culture broth
powder (CBP; 1% DNJ) and evaluated the physiological effects of 5-wk dietary CBP intake in C57BL/6J mice. CBP intake tended to suppress the elevation of
blood glucose level during oral
glucose tolerance test. Moreover, CBP intake significantly lowered the fasting plasma
glucose level and white adipose tissue mass. Next, we evaluated the absorption and distribution of DNJ in mice organs after daily CBP intake. We found detectable amount of DNJ in organs with intestine and kidney as the major targeted organs. We concluded that the DNJ content in CBP is absorbed from digestive tract, distributed and accumulated in organs, which most likely to contribute to the alteration of
blood glucose regulation and adiposity in C57BL/6J mice. Our study was the first to report the physiological effects of CBP produced from B. amyloliquefaciens AS385 and the organ distribution of DNJ from CBP.