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    • 4. 发明授权
    • Methods and substances for recruiting therapeutic agents to solid tumors
    • 将治疗剂引入实体瘤的方法和物质
    • US06685930B1
    • 2004-02-03
    • US08855744
    • 1997-05-08
    • Tse Wen Chang
    • Tse Wen Chang
    • A61K4500
    • C07K16/468A61K9/1271A61K38/00A61K47/6879A61K47/6893A61K47/6913B82Y5/00C07K2319/00
    • Disclosed is a method of using bifunctional binding molecules, such as two linked VH-VL single chain binding molecules, to recruit a therapeutic agent to a solid tissue site. The therapeutic agent is administered separately from the binding molecules and following the administration of a remover substance which aids in clearing free binding molecules in the circulation. In the preferred mode of the invention, the binding molecules have one specificity for antigens at the target site and one for the therapeutic agent. The binding molecules are administered and allowed time to approach a maximum concentration in the extravascular space. A remover substance, preferably a liposome conjugated with antibodies which are reactive with an antigenic epitope on the binding molecules, is then administered to remove excess binding molecules from the circulation and the extravascular space. A therapeutic agent, preferably a cytotoxic drug such as ricin A chain modified so as to enable it to enter the target cells once delivered to the target site, is then administered.
    • 公开了使用双功能结合分子(例如两个连接的VH-VL单链结合分子)将治疗剂募集到固体组织部位的方法。 治疗剂与结合分子分开施用,并且在施用有助于清除循环中的游离结合分子的去除剂物质后。 在本发明的优选方式中,结合分子对靶位点的抗原具有一个特异性,而对治疗剂具有一个特异性。 施用结合分子并允许时间接近血管外空间的最大浓度。 然后施用去除剂物质,优选与抗体结合的脂质体,其与结合分子上的抗原表位反应,以从循环和血管外空间中除去过量的结合分子。 然后施用治疗剂,优选细胞毒性药物如蓖麻毒蛋白A链修饰,以使其能够一旦递送至靶位点进入靶细胞。