S
Seikou Nakamura
Researcher at Kyoto Pharmaceutical University
Publications - 217
Citations - 4980
Seikou Nakamura is an academic researcher from Kyoto Pharmaceutical University. The author has contributed to research in topics: Triterpene & Oleanane. The author has an hindex of 38, co-authored 204 publications receiving 4371 citations.
Papers
More filters
Journal ArticleDOI
Medicinal flowers. XII.(1)) New spirostane-type steroid saponins with antidiabetogenic activity from Borassus flabellifer.
Masayuki Yoshikawa,Fengming Xu,Toshio Morikawa,Toshio Morikawa,Yutana Pongpiriyadacha,Seikou Nakamura,Yasunobu Asao,Akira Kumahara,Hisashi Matsuda +8 more
TL;DR: From the methanolic extract from the male flowers of Borassus flabellifer, six new spirostane-type steroid saponins, borassosides A-F, were isolated together with 23 known constituents and their structures were elucidated on the basis of chemical and physicochemical evidences.
Journal ArticleDOI
New type of anti-diabetic compounds from the processed leaves of Hydrangea macrophylla var. thunbergii (Hydrangeae Dulcis Folium).
TL;DR: Hydrangenol, a principal constituent, significantly increased the amount of adip onectin released into the medium and mRNA levels of adiponectin, peroxisome proliferator-activated receptor gamma2 (PPARgamma2), and glucose transporter 4 (GLUT4), while it decreased the expression of interleukin 6 (IL-6) mRNA.
Journal ArticleDOI
Melanogenesis inhibitors from the desert plant Anastatica hierochuntica in B16 melanoma cells.
Souichi Nakashima,Hisashi Matsuda,Yoshimi Oda,Seikou Nakamura,Fengming Xu,Masayuki Yoshikawa +5 more
TL;DR: The methanolic extract from the whole plants of Anastatica hierochuntica, an Egyptian herbal medicine, was found to inhibit melanogenesis in theophylline-stimulated murine B16 melanoma 4A5 cells and the inhibition of tyrosinase activity suggested to be important.
Journal ArticleDOI
Phenylethanoid oligoglycosides and acylated oligosugars with vasorelaxant activity from Cistanche tubulosa.
Masayuki Yoshikawa,Hisashi Matsuda,Toshio Morikawa,Toshio Morikawa,Haihui Xie,Seikou Nakamura,Osamu Muraoka +6 more
TL;DR: The methanolic extract from the dried stems of Cistanche tubulosa (Schrenk) R. Wight was found to show an inhibitory effect on contractions induced by noradrenaline in isolated rat aortic strips.
Journal ArticleDOI
Melanogenesis inhibitors from the rhizomes of Alpinia officinarum in B16 melanoma cells.
TL;DR: The 80% aqueous acetone extract from the rhizomes of Alpinia officinarum, a Chinese medicinal herb, were found to inhibit melanogenesis in theophylline-stimulated murine B16 melanoma 4A5 cells.