Spongolactams, Farnesyl Transferase Inhibitors from a Marine Sponge: Isolation through an LC/MS-Guided Assay, Structures, and Semisyntheses
作者:Daisuke Mori、Yuko Kimura、Shigeyuki Kitamura、Youji Sakagami、Yukio Yoshioka、Tomoaki Shintani、Tetsuji Okamoto、Makoto Ojika
DOI:10.1021/jo071003y
日期:2007.9.1
Novel nitrogenous diterpenoids, spongolactams A−C (1−3), were isolated as trace components of an Okinawan marine sponge, Spongia sp., by an LC/MS-guided assay for farnesyl transferase (FTase) inhibitors. Their structures were elucidated by spectroscopic analyses. To evaluate their structures and biological activity, the metabolites were semisynthesized from the known furanoditerpene 5, obtained from
新颖的含氮二萜类化合物,spongolactams A-C(1 - 3),分离为冲绳海绵,的痕量组分海绵Spongia。SP,通过LC / MS-引导测定法法尼基转移(FT酶)抑制剂。通过光谱分析阐明了它们的结构。为了评估其结构和生物学活性,将代谢物从已知的呋喃二萜5中合成,呋喃二萜5是从相同的海绵中获得的。三个相关的化合物4,13,和16也semisynthesized。该IC 50值对FT酶为1 - 3分别为23,130,和> 260μM,而IC针对人类肿瘤细胞系的50值分别为2.0、3.5和20μM。六个化合物中的结构活性关系表明FTase抑制活性和细胞毒性活性之间存在某些正相关。