[EN] GELDANAMYCIN AND DERIVATIVES INHIBIT CANCER INVASION AND IDENTIFY NOVEL TARGETS<br/>[FR] GELDANAMYCINE ET SES DERIVES POUVANT INHIBER UNE PROLIFERATION CANCEREUSE ET IDENTIFIER DE NOUVELLES CIBLES
申请人:VAN ANDEL RES INST
公开号:WO2005095347A1
公开(公告)日:2005-10-13
Geldanamycin derivatives that block the uPA-plasmin network and inhibit growth and invasion by glioblastoma cells and other tumors at femtomolar concentrations are potentially highly active anti-cancer drugs. GA and various 17-amino-17-demethoxygelddanamycin derivatives are disclosed that block HGF/SF-mediated Met tyrosine kinase receptor-dependent uPA activation at fM levels. Other ansamycins (macbecins I and II), GA derivatives, and radicicol required concentrations several logs higher (≥nM) to achieve such inhibition. The inhibitory activity of tested compounds was discordant with the known ability of drugs of this class to bind to hsp90, indicating the existence of a novel target(s) for HGF/SF -mediated events in tumor development. Methods of using such compounds to inhibit cancer cell activities and to treat tumors are disclosed. Such treatment with low doses of these highly active compounds provide an option for treating various Met-expressing tumors, in particular invasive brain cancers, either alone or in combination with conventional surgery, chemotherapy, or radiotherapy.
盖尔达霉素衍生物可以在飞托摩尔浓度下阻断uPA-纤溶酶网络,抑制胶质母细胞瘤细胞和其他肿瘤的生长和侵袭,潜在地是高活性的抗癌药物。已披露了盖尔达霉素(GA)和各种17-氨基-17-去甲氧基盖尔达霉素衍生物,可以在飞托摩尔水平下阻断HGF/SF介导的Met酪氨酸激酶受体依赖的uPA激活。其他吖丝霉素类化合物(马克贝辛I和II)、盖尔达霉素衍生物和雷地可(radicicol)需要更高几个数量级(≥nM)的浓度才能实现这种抑制作用。经测试的化合物的抑制活性与该类药物已知结合到hsp90的能力不符,表明存在一种新的靶标,用于抑制HGF/SF介导的肿瘤发展事件。公开了使用这类化合物来抑制癌细胞活动和治疗肿瘤的方法。用这些高活性化合物的低剂量进行治疗为治疗各种表达Met的肿瘤提供了一种选择,特别是侵袭性脑癌,可以单独使用或与常规手术、化疗或放疗结合使用。