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RISS 인기검색어
- 검색키워드
- 저자 : Norihiro Nishimura (검색결과 2 건)
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Nobuo Matsuura,Liqing Zang,Norihiro Nishimura,Yasuhito Shimada 한국식품영양과학회 2020 Journal of medicinal food Vol.23 No.8
Sparassis crispa (SC), known as cauliflower mushroom, possesses a wide variety of health-promoting properties and a high content of β-glucans. Its nutritional properties are enhanced by fermentation. In this study, we examined the efficacy of Lactobacillus-fermented (lacto-fermented) SC against obesity using a zebrafish model. We first fermented SC by Lactobacillus paracasei, denoted as lacto-fermented SC (L-SC), for 48 h and then orally administered SC or L-SC to diet-induced obese zebrafish for 4 weeks. Results demonstrated that the L-SC group (20 μg/gBW/day) significantly (P < .01) suppressed body weight gain and ameliorated lipid accumulation in liver tissues, whereas SC did not exhibit antiobesity effects. We further performed expression analysis of genes related to lipid metabolism in the liver and visceral adipose tissues (VAT) in L-SC-administered fish. In liver tissues, L-SC upregulated (P < .05) expression of genes involved in peroxisome proliferator-activated receptor alpha pathways, suggesting that the lipid-lowering property of L-SC is caused by activation of beta-oxidation. In VAT, L-SC did not show significant changes between the experimental groups. No difference was observed between the β-glucan contents of SC (43.8 g/100 g) and L-SC (44.3 g/100 g); however, β-glucan levels in the hot-water extracts increased 20-fold in L-SC (37.2 g/100 g) compared with those in SC (1.8 g/100 g). In summary, lacto-fermentation of SC enhances its lipid-lowering property and can prevent hepatic steatosis through activation of beta-oxidation. Dietary supplementation of fermented L-SC as a functional food may be suitable for obesity prevention and reduction in the prevalence of obesity-related diseases.
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Yuka Yamada,Sasicha Chensom,Hisataka Yonemoto,Hiroko Nakayama,Liqing Zang,Norihiro Nishimura,Takashi Mishima,Yasuhito Shimada 한국식품영양과학회 2020 Journal of medicinal food Vol.23 No.1
Yamato Tachibana (Tachibana; Citrus tachibana) is an endemic fruit and represents one of the oldest citrus species in Japan; it is grown in the Mie Prefecture. It has been attracting attention for its cultural heritage and unique scent. To evaluate biological activities of Tachibana, we fed several parts of the Tachibana fruit (whole fruit, pulp [albedo and segment wall], and flavedo) to adult zebrafish and found that Tachibana increased body weight and plasma triglycerides besides increasing overall food intake. We then created a simple fluorescence-based feeding assay using dried rotifer sheets and larval zebrafish (6 days postfertilization) to screen the various extracts of Tachibana parts. We found that water extracts of Tachibana pulp increased feeding volume in zebrafish. Although citrus species are believed to prevent obesity and obesity-associated diseases in general, our findings showed that water extracts of Tachibana increase food intake in zebrafish and lead to an increase in body weight. We suggest that Tachibana might reverse appetite loss in lean populations and may prove beneficial in aiding fish cultivation.
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