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    • 6. 发明授权
    • Methods for screening antibodies for use as immunotoxins
    • 用于筛选用作免疫毒素的抗体的方法
    • US5045451A
    • 1991-09-03
    • US262974
    • 1988-10-26
    • Jonathan W. UhrEllen S. Vitetta
    • Jonathan W. UhrEllen S. Vitetta
    • G01N33/50G01N33/577
    • G01N33/5008G01N33/577Y10S436/813
    • The present disclosure described an assay for screening monoclonal antibodies for their potential as highly cytotoxic immunotoxins. The assay involves treating cells with dilutions of the test antibody followed by a Fab fragment of a secondary antibody coupled to an A chain toxin ("indirect assay"). The cytotoxicity of the indirect assay is compared to that of the direct assay where the monoclonal antibody is coupled to an A chain toxin. Indirect and direct assays were carried out using 14 antibodies and a panel of 8 human and mouse cell types. The two assays showed virtually 100% correlation. The indirect assay, therefore, predicts the potency of a given monoclonal antibody to make an effective immunotoxin and should be useful in screening monoclonal antibodies for use as immunotoxins.
    • 本公开描述了用于筛选单克隆抗体作为高细胞毒性免疫毒素的潜力的测定法。 该测定包括用稀释的测试抗体然后是与A链毒素偶联的二抗的Fab片段(“间接测定”)处理细胞。 将间接测定的细胞毒性与单克隆抗体与A链毒素偶联的直接测定的细胞毒性进行比较。 使用14种抗体和8种人和小鼠细胞类型进行间接和直接测定。 这两种测定显示出几乎100%的相关性。 因此,间接测定预测给定单克隆抗体产生有效免疫毒素的效力,并且可用于筛选用作免疫毒素的单克隆抗体。
    • 9. 发明授权
    • Therapeutic compositions comprising a CD4 peptide and methods of
treatment of HIV infections
    • 包含CD4肽的治疗组合物和治疗HIV感染的方法
    • US5767072A
    • 1998-06-16
    • US171206
    • 1993-12-21
    • Ellen S. VitettaJonathan W. Uhr
    • Ellen S. VitettaJonathan W. Uhr
    • A61K47/48A61K38/10A61K38/16
    • A61K47/48276
    • Disclosed are methods and compositions for the treatment of HIV infections through the specific elimination of cells which express HIV env determinants such as gp120. The compositions of the invention include toxin conjugates composed of a CD4 derived gp120 binding ligand conjugated to a toxin A chain moiety such as ricin A chain or deglycosylated ricin A chain. Where a therapeutic composition is desired, the conjugates are formed by means of a cross linker which includes a disulfide bond. Disulfide linkages are not crucial where non-therapeutic uses, such as antibody generation, is intended. In preferred aspects of the invention, conjugates incorporating shorter CD4 peptides, such as those incorporating amino acids 41-57 or 41-84 of CD4, are disclosed. Therapeutic amounts of conjugates composed of soluble CD4 or a CD4 peptide cross-linked to deglycosylated A chain by means of as SMPT linker is administered to an HIV infected patient so as to specifically eliminate HIV infected cells without exerting significant toxicity against uninfected or class II cells.
    • 公开了通过特异性消除表达HIV环境因子如gp120的细胞来治疗HIV感染的方法和组合物。 本发明的组合物包括由与CD4毒素A链部分(例如蓖麻毒素A链或去糖基化的蓖麻毒素A链)缀合的CD4衍生的gp120结合配体组成的毒素缀合物。 当需要治疗组合物时,通过包含二硫键的交联剂形成缀合物。 在非治疗用途,如产生抗体的情况下,二硫键不是至关重要的。 在本发明的优选方面,公开了结合较短CD4肽的缀合物,例如掺入CD4的氨基酸41-57或41-84的那些。 通过作为SMPT接头的可溶性CD4或与去糖基化A链交联的CD4肽组成的缀合物的治疗量被施用于HIV感染的患者,以特异性地消除HIV感染的细胞,而不对未感染或II类细胞产生显着的毒性 。