- 著者
- Hiroshi TAKII Takashi KOMETANI Takahisa NISHIMURA Takashi KURIKI Tohru FUSHIKI
- 出版者
- Japanese Society for Food Science and Technology
- 雑誌
- Food Science and Technology Research (ISSN:13446606)
- 巻号頁・発行日
- vol.10, no.4, pp.428-431, 2007-11-25 (Released:2008-08-28)
- 参考文献数
- 18
- 被引用文献数
- 20 22
Gastrointestinal disorders after ingesting a sports drink were investigated during bicycle exercise. The experiment consisted of a preliminary exercise, a 10 min rest, and 30 min of exercise. Seven healthy untrained volunteers ingested either water or a sports drink based on highly branched cyclic dextrin (HBCD), commercially available dextrin of DE16 or glucose immediately after the preliminary exercise. The mean gastric emptying time after ingestion of the HBCD-based sports drink was significantly faster than that of the glucose-based drink. Gastrointestinal disorders were monitored by a questionnaire. The mean degree of subjective flatulence and the mean number of belches were few with the HBCD-based drink during exercise. When volunteers drank the sports drink based on 10% HBCD during bicycle exercise, they experienced few gastrointestinal disorders and consequently could continue the exercise comfortably with little fatigue.
- 著者
- Hiroko Takumi Kazuko Kato Takayo Ohto-N. Hiroki Nakanishi Hiroshi Kamasaka Takashi Kuriki
- 出版者
- Japan Oil Chemists' Society
- 雑誌
- Journal of Oleo Science (ISSN:13458957)
- 巻号頁・発行日
- vol.70, no.12, pp.1707-1717, 2021 (Released:2021-12-03)
- 参考文献数
- 25
- 被引用文献数
- 7
Oils and lipids are common food components and efficient sources of energy. Both the quantity and the quality of oils and lipids are important with regard to health and disease. Fatty acid ester of hydroxy fatty acid (FAHFA) is a novel lipid class that was discovered as an endogenous lipid; FAHFAs have shown anti-diabetic effects in a mammalian system. We analyzed the overall FAHFA composition in nut oils and other common oils: almond (raw, roasted), walnut, peanut, olive, palm, soybean, and rapeseed oils. We developed a method of liquid chromatography coupled with electrospray ionization triple quadrupole mass spectrometry (LC-ESI/MS/MS) for a comprehensive target analysis of FAHFAs. The analysis revealed wide variation in the FAHFA profiles (15 compounds and 62 peaks). For 7-11 compounds of FAHFA, a total level of 8-29 pmol/mg oil was detected in nuts oils; for 11 compounds, 4.9 pmol/mg oil was detected in olive oil, and for 4-9 compounds, < 2 pmol/mg oil was detected in palm, soy, and rapeseed oils. The major FAHFAs were FAHFA 36:3, FAHFA 36:2, and FAHFA 36:4 in nut oil, FAHFA 36:2, FAHFA 34:1, and FAHFA 36:1 in olive oil, and FAHFA 32:1, FAHFA 34:0, FAHFA 36:0, and FAHFA 36:1 in all of the common oils. The composition of FAHFAs in nut oils is mainly unsaturated fatty acids, whereas those in olive oil are unsaturated fatty acids and saturated fatty acids. The composition of FAHFAs in common oils was mainly saturated fats. This is the first report to demonstrate the quality and quantity of the FAHFAs in the nut oils. Nuts have been described to be a great source of many nutrients and to be beneficial for our health. Our present findings comprise additional evidence that the intake of nuts in daily diets may prevent metabolic and inflammatory-based diseases.
2 0 0 0 OA α-アルブチンの開発 : 工業スケールでの製造および美白化粧品原料への応用
- 著者
- Kazuhisa Sugimoto Takahisa Nishimura Takashi Kuriki
- 出版者
- FCCA(Forum: Carbohydrates Coming of Age)
- 雑誌
- Trends in Glycoscience and Glycotechnology (ISSN:09157352)
- 巻号頁・発行日
- vol.19, no.110, pp.235-246, 2007-11-02 (Released:2008-12-12)
- 参考文献数
- 38
- 被引用文献数
- 5 10
私たちはフェノール性水酸基への糖転移反応を効率的に触媒する新規酵素を得ることに成功した。本酵素、すなわちハイドロキノン配糖化酵素はα-アノマー選択的な配糖化反応を触媒した。さらに本酵素を用いる反応は、生成物である4-hydroxyphenyl-O-α-D-glucopyranosideを非常に高い収量で得ることができ、産業的な利用に十分なレベルを充たしていた。本酵素反応によりコウジ酸やカフェ酸をはじめ多くのフェノール化合物が配糖化されたがアルコールは配糖化されなかった。さらに私たちは本酵素反応により得られた配糖体の一種である4-hydroxyphenyl-O-α-D-glucopyranoside (α-アルブチン) の応用研究に取り組んだ。α-アルブチンはヒト細胞由来チロシナーゼを強力に阻害し、その阻害活性は構造異性体である4-hydroxyphenyl-O-α-D-glucopyranoside (アルブチン) よりも非常に高いものであった。私たちは数種類のα-アルブチン配糖体とアルブチン配糖体を酵素合成した。得られた配糖体のチロシナーゼ阻害活性の比較結果から、分子の大きさとベンゼン環周辺の静電ポテンシャルがハイドロキノン配糖体のヒトチロシナーゼ阻害作用に大きく影響を与えることが示唆された。さらにα-アルブチンのメラニン生合成に対する阻害効果についても検討を行った。α-アルブチンは細胞毒性を示さない濃度域においてヒトメラノーマ細胞やヒト皮膚3次元モデルのメラニン生成を濃度依存的に抑制した。上記の結果よりα-アルブチンは有効かつ安全な化粧品用美白素材であることが示唆された。
- 著者
- Azusa Nishino Kazuhisa Sugimoto Haruyo Sambe Takashi Ichihara Takeshi Takaha Takashi Kuriki
- 出版者
- Japan Oil Chemists' Society
- 雑誌
- Journal of Oleo Science (ISSN:13458957)
- 巻号頁・発行日
- pp.ess17265, (Released:2018-06-07)
- 被引用文献数
- 16
Generation of singlet oxygen by solar ultraviolet (UV) radiation causes acute inflammatory responses in the skin. Accumulation of singlet-oxygen-quenching antioxidants in the skin can suppress this photo-oxidative stress. This study evaluated the effect of dietary xanthophylls from red paprika fruit extract on UV-induced skin damage. A randomised double-blind placebo-controlled parallel group comparison study involving 46 healthy volunteers was performed. The minimal erythema dose (MED) of each individual was determined prior to the study. A capsule containing paprika xanthophylls (9 mg) or a placebo was administered daily for 5 weeks. The MED, minimal tanning dose (MTD), skin physiology parameters (skin color, hydration, and barrier function), and facial skin physiology parameters were evaluated at weeks 0, 2, and 4. The MED of the verum group at 2 and 4 weeks after administration was significantly higher than that of the placebo group. At 4 weeks, the suppression of UV-induced skin darkening by the verum diet was significantly greater than that of the placebo. There were no significant differences in facial skin parameters between the verum and placebo groups. Our results indicate the efficacy of dietary paprika xanthophylls in suppression of UV-induced skin damage.
- 著者
- Kazuhisa Sugimoto Takahisa Nishimura Koji Nomura Kenji Sugimoto Takashi Kuriki
- 出版者
- The Pharmaceutical Society of Japan
- 雑誌
- Chemical and Pharmaceutical Bulletin (ISSN:00092363)
- 巻号頁・発行日
- vol.51, no.7, pp.798-801, 2003 (Released:2003-07-01)
- 参考文献数
- 16
- 被引用文献数
- 103 110
The effects of 4-hydroxyphenyl α-glucopyranoside (α-arbutin) and 4-hydroxyphenyl β-glucopyranoside (arbutin) on the activity of tyrosinase from human malignant melanoma cells were examined. The inhibitory effect of α-arbutin on human tyrosinase was stronger than that of arbutin. The Ki value for α-arbutin was calculated to be 1/20 that for arbutin. We then synthesized arbutin-α-glycosides by the transglycosylation reaction of cyclomaltodextrin glucanotransferase using arbutin and starch, respectively, as acceptor and donor molecules. The structural analyses using 13C- and 1H-NMR proved that the transglycosylated products were 4-hydroxyphenyl β-maltoside (β-Ab-α-G1) and 4-hydroxyphenyl β-maltotrioside (β-Ab-α-G2). These arbutin-α-glycosides exhibited competitive type inhibition on human tyrosinase, and their Ki values were calculated to be 0.7 mM and 0.9 mM, respectively. These arbutin-α-glycosides posessed stronger inhibitory activity than arbutin, but less activity than α-arbutin. These results suggested that the α-glucosidic linkage of hydroquinone-glycosides plays an important role in the inhibitory effect on human tyrosinase.
- 著者
- Azusa Nishino Kazuhisa Sugimoto Haruyo Sambe Takashi Ichihara Takeshi Takaha Takashi Kuriki
- 出版者
- Japan Oil Chemists' Society
- 雑誌
- Journal of Oleo Science (ISSN:13458957)
- 巻号頁・発行日
- vol.67, no.7, pp.863-869, 2018 (Released:2018-07-01)
- 参考文献数
- 29
- 被引用文献数
- 8 16
Generation of singlet oxygen by solar ultraviolet (UV) radiation causes acute inflammatory responses in the skin. Accumulation of singlet-oxygen-quenching antioxidants in the skin can suppress this photo-oxidative stress. This study evaluated the effect of dietary xanthophylls from red paprika fruit extract on UV-induced skin damage. A randomised double-blind placebo-controlled parallel group comparison study involving 46 healthy volunteers was performed. The minimal erythema dose (MED) of each individual was determined prior to the study. A capsule containing paprika xanthophylls (9 mg) or a placebo was administered daily for 5 weeks. The MED, minimal tanning dose (MTD), skin physiology parameters (skin color, hydration, and barrier function), and facial skin physiology parameters were evaluated at weeks 0, 2, and 4. The MED of the verum group at 2 and 4 weeks after administration was significantly higher than that of the placebo group. At 4 weeks, the suppression of UV-induced skin darkening by the verum diet was significantly greater than that of the placebo. There were no significant differences in facial skin parameters between the verum and placebo groups. Our results indicate the efficacy of dietary paprika xanthophylls in suppression of UV-induced skin damage.
- 著者
- Azusa Nishino Takashi Ichihara Takeshi Takaha Takashi Kuriki Hideko Nihei Kazuhisa Kawamoto Hiroyuki Yasui Takashi Maoka
- 出版者
- 公益社団法人 日本油化学会
- 雑誌
- Journal of Oleo Science (ISSN:13458957)
- 巻号頁・発行日
- pp.ess15118, (Released:2015-09-15)
- 被引用文献数
- 3 23
The accumulation (incorporation) of paprika carotenoid in human plasma and erythrocytes was investigated. A paprika carotenoid supplement (14 mg/day) was ingested for 4 weeks by 5 young healthy volunteers (3 men and 2 women). After 2 weeks of carotenoid ingestion, the carotenoid levels in plasma and erythrocytes increased by 1.2-fold and 2.2-fold, respectively. Characteristic carotenoids found in paprika (capsanthin, cucurbitaxanthin A, and cryptocapsin) were detected in both plasma and erythrocytes. An oxidative metabolite of capsanthin (capsanthone) was also found in both plasma and erythrocytes.