Publications by authors named "Manabu Kuroda"

Our recent study indicated that dietary -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 and and the levels of free threonine, alanine, proline, taurine, ornithine, phenylalanine, cystine, and γ-aminobutyric acid in the cecum contents of rats fed with an adequate protein diet, but not in those fed with a low-protein diet.

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Introduction: Recently, the population of individuals with non-celiac gluten sensitivity (NCGS) who do not have celiac disease but show improved symptoms with a gluten-free diet, has increased. Enzyme replacement therapy using digestive enzymes is expected to improve the symptoms of NCGS and be sustainable, since gluten-related proteins that are indigestible by the digestive system have been considered triggers of NCGS.

Methods: We selected patients with NCGS by screening demographic interviews, as well as performing medical evaluations, anti-gluten antibody tests, and gluten challenge tests.

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Article Synopsis
  • Rats fed a high-fat diet combined with an Amano protease preparation showed an increase in Bifidobacterium in their cecum, suggesting a potential link between the protease and gut health.
  • The study aimed to determine if the increase in Bifidobacterium was due to the presence of acid protease (AcP) by feeding rats a high-fat diet with various concentrations of purified AcP.
  • Results revealed that while 1 g/kg of Amano protease increased Bifidobacterium counts, the same was not true for 0.096 g/kg AcP; however, a higher dose of 0.384 g/kg AcP did lead to significant increases, indicating that AcP could
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Cyclothiazomycin B1 (CTB1) is an antifungal cyclic thiopeptide isolated from the culture broth of Streptomyces sp. HA 125-40. CTB1 inhibited the growth of several filamentous fungi including plant pathogens along with swelling of hyphae and spores.

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In our survey for antifungal compounds, a fermentation broth of Streptomyces sp. HA81-2 was found to inhibit the in vitro growth of Aspergillus fumigatus IFO 5840 accompanied by hyphal morphological abnormalities. One of the isolated antibiotics was identified as phoslactomycin E based on LC-MS and NMR spectral data.

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