Melanogenesis-Inhibitory Activity of Aromatic Glycosides from the Stem Bark of<i>Acer buergerianum</i>
作者:Toshihiro Akihisa、Masashi Orido、Hiroyuki Akazawa、Akitomo Takahashi、Ayako Yamamoto、Eri Ogihara、Makoto Fukatsu
DOI:10.1002/cbdv.201200251
日期:2013.2
A new benzyl glucoside, 3-O-demethylnikoenoside (1), along with eleven known compounds, including seven aromatic glycosides, 2-8, three lignans, 9-11, and one cyclitol, 12, were isolated from the BuOH-soluble fraction of a MeOH extract of Acer buergerianum stem bark. The structures of the new compound were elucidated on the basis of extensive spectroscopic analyses and comparison with literature. Upon
从可溶于BuOH的馏分中分离出一种新的苄基葡萄糖苷3-O-去甲基核苷(1)以及11种已知化合物,包括7种芳香族糖苷2-8、3种木脂素9-11和1种环糖醇。宏cer茎皮的甲醇提取物 在广泛的光谱分析和与文献比较的基础上阐明了新化合物的结构。在评估化合物1-12对由α-黑素细胞刺激激素(α-MSH)诱导的B16黑色素瘤细胞中黑素生成的影响后,三种化合物,即金丝桃苷B(8),松油醇4-O-β-D-吡喃葡萄糖苷(9 ),发现与100μM的对照相比,松油醇4-O-β-D-apiofuranosyl-(1→2)-β-D-吡喃葡萄糖苷(10)表现出抑制作用,黑色素含量为41-49%对细胞的毒性低(在100μM时细胞活力为81-92%)。蛋白质印迹分析表明,化合物8以浓度依赖的方式降低了MITF(=小噬菌体相关转录因子)和酪氨酸酶的蛋白质水平,这表明化合物8至少通过以下方式抑制了α-MSH刺激的B16黑色