期刊
BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY
卷 83, 期 10, 页码 1901-1911出版社
OXFORD UNIV PRESS
DOI: 10.1080/09168451.2019.1627183
关键词
Aspergillus; protease; gut; Bifidobacterium; amino acids
类别
资金
- Amano Enzyme Inc., Nagoya, Japan
Our recent study indicated that dietary Aspergillus oryzae-derived protease preparation (AP), through its enzymatic activity, exerted a bifidogenic effect in rats. We hypothesized that dietary AP links to protein degradation and subsequently elevates gut-protective amino acids (AAs) in rats fed adequate protein diet. In this study, dietary AP markedly increased the relative abundance of Bifidobacterium and Lactobacillus and the levels of free threonine, alanine, proline, taurine, ornithine, phenylalanine, cystine, and gamma-aminobutyric acid in the cecum contents of rats fed with an adequate protein diet, but not in those fed with a low-protein diet. The elevated AAs, except ornithine and phenylalanine, potentially have gut-related health benefits. Some of the AP-modulated free AAs appeared to be associated with the relative abundance of Bifidobacterium and Lactobacillus. Thus, AP combined with adequate protein diet is likely to increase the levels of cecum beneficial free AAs, which is partially associated with the relative abundance of the probiotics.
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