Mangromicins A and B: structure and antitrypanosomal activity of two new cyclopentadecane compounds from Lechevalieria aerocolonigenes K10-0216
作者:Takuji Nakashima、Masato Iwatsuki、Junya Ochiai、Yoshiyuki Kamiya、Kenichiro Nagai、Atsuko Matsumoto、Aki Ishiyama、Kazuhiko Otoguro、Kazuro Shiomi、Yōko Takahashi、Satoshi Ōmura
DOI:10.1038/ja.2013.129
日期:2014.3
Two new cyclopentadecane antibiotics, named mangromicins A and B, were separated out from the culture broth of Lechevalieria aerocolonigenes K10-0216 by Diaion HP-20, silica gel and ODS column chromatography, and were finally purified by HPLC. The chemical structures of the two novel compounds were elucidated by instrumental analyses, including various NMR, MS and X-ray crystallography. Mangromicins A and B consist of cyclopentadecane skeletons with a tetrahydrofuran unit and a 5,6-dihydro-4-hydroxy-2-pyrone moiety. Mangromicins A and B showed in vitro antitrypanosomal activity with IC50 values of 2.4 and 43.4âμgâmlâ1, respectively. The IC50 values of both compounds were lower than those of cytotoxicity against MRC-5 human fetal lung fibroblast cells.
通过 Diaion HP-20、硅胶和 ODS 柱色谱法,从气孔菌 K10-0216 的培养液中分离出两种新的环十五烷抗生素,命名为莽草菌素 A 和 B,并最终通过高效液相色谱法纯化。通过各种核磁共振、质谱和 X 射线晶体学等仪器分析,阐明了这两种新型化合物的化学结构。曼戈瑞辛 A 和 B 的骨架为环十五烷,其中含有一个四氢呋喃单元和一个 5,6- 二氢-4-羟基-2-吡喃酮分子。曼戈瑞辛 A 和 B 具有体外抗盘虫活性,其 IC50 值分别为 2.4 和 43.4⅓gâmlâ1。这两种化合物的IC50值均低于对MRC-5人胎肺成纤维细胞的细胞毒性。