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    • 9. 发明申请
    • CERTAIN IMPROVED COMBINATION BACTERIOLYTIC THERAPY FOR THE TREATMENT OF TUMORS
    • 一些改进的组合治疗肿瘤的微生物治疗
    • WO2005039491A9
    • 2005-06-02
    • PCT/US2004034624
    • 2004-10-21
    • UNIV JOHNS HOPKINSDANG LONGBETTEGOWDA CHETANKINZLER KENNETH WVOGELSTEIN BERT
    • DANG LONGBETTEGOWDA CHETANKINZLER KENNETH WVOGELSTEIN BERT
    • A01N63/00A61K20060101A61K
    • A61K35/742A61K31/195A61K31/4045A61K38/06A61K2300/00
    • Current approaches for treating cancer are limited, in part, by the inability of drugs to affect the poorly vascularized regions of tumors. We have found that spores of anaerobic bacteria in combination with agents which interact with microtubules can cause the destruction of both the vascular and avascular compartments of tumors. Two classes of microtubule inhibitors were found to exert markedly different effects. Some agents that inhibited microtubule synthesis such as HTI-286 and vinorelbine, caused rapid, massive hemorrhagic necrosis when used in combination with spores. In contrast, agents that stabilized microtubules, such as the taxanes docetaxel and MAC-321, resulted in slow tumor regressions that killed most neoplastic cells. Remaining cells in the poorly perfused regions of tumors could be eradicated by sporulated bacteria Mechanistic studies showed that the microtubule destabilizers, but not the microtubule stabilizers, radically reduced blood flow to tumors, thereby enlarging the hypoxic niche in which spores could germinate. A single intravenous injection of spores plus selected microtubule-interacting agents was able to cause regressions of several tumors in the absence of excessive toxicity.
    • 目前用于治疗癌症的方法在一定程度上受到药物不能影响肿瘤血管不足的区域的限制。 我们已经发现,厌氧细菌的孢子与与微管相互作用的药物组合可能导致肿瘤的血管和非血管性腔室的破坏。 发现两类微管抑制剂发挥显着不同的作用。 一些抑制微管合成的药物,如HTI-286和长春瑞滨,当与孢子结合使用时,引起快速,大规模的出血性坏死。 相比之下,稳定微管的药物,如紫杉烷多西紫杉醇和MAC-321,导致肿瘤缓慢减退,杀死大部分肿瘤细胞。 肿瘤细胞灌注不良区域的剩余细胞可以被孢子细菌消灭机制研究表明,微管不稳定剂,而不是微管稳定剂,从根本上减少了血液流向肿瘤,从而扩大了孢子可能发芽的缺氧生态位。 在没有过量毒性的情况下,单次静脉注射孢子加选择的微管相互作用剂能够引起几种肿瘤的回归。