Structures of New Flavonoids and Benzofuran-Type Stilbene and Degranulation Inhibitors of Rat Basophilic Leukemia Cells from the Brazilian Herbal Medicine Cissus sicyoides
作者:Fengming Xu、Hisashi Matsuda、Hiroki Hata、Kaoru Sugawara、Seikou Nakamura、Masayuki Yoshikawa
DOI:10.1248/cpb.57.1089
日期:——
Three new flavonoid glycosides (cissosides I, II, and III) and a new benzofuran-type stilbene (cissusin) were isolated from the methanolic extract of the aerial parts of Cissus sicyoides cultivated in Brazil. Their structures were elucidated on the basis of chemical and physicochemical evidence. The inhibitory effects of the isolated constituents on the release of β-hexosaminidase as a marker of degranulation in rat basophilic leukemia (RBL-2H3) cells were examined. Cissusin, flavonols (kaempferol, quercetin), flavones (7,3′,4′-trihydroxyflavone, lanceolatin B), pterocarpanes (homopterocarpin), chalcones (isoliquiritigenin, E-7-O-methylpongamol), and tryptanthrin markedly inhibited the release of β-hexosaminidase.
从巴西种植的西洋接骨木(Cissus sicyoides)气生部分的甲醇提取物中分离出了三种新的黄酮苷(西洋接骨木苷 I、II 和 III)和一种新的苯并呋喃类芪(西洋接骨木素)。根据化学和物理化学证据阐明了它们的结构。研究了分离成分对大鼠嗜碱性粒细胞白血病(RBL-2H3)细胞中作为脱颗粒标记物的β-己糖胺酸酶释放的抑制作用。Cissusin、黄酮醇(山奈酚、槲皮素)、黄酮(7,3′,4′-三羟基黄酮、lanceolatin B)、紫檀素(homopterocarpin)、查尔酮(isiquiritigenin、E-7-O-methylpongamol)和色黄素能明显抑制β-己糖胺酶的释放。