Methods of inducing immune tolerance using immunotoxins
    4.
    发明授权
    Methods of inducing immune tolerance using immunotoxins 失效
    使用免疫毒素诱导免疫耐受的方法

    公开(公告)号:US6103235A

    公开(公告)日:2000-08-15

    申请号:US843409

    申请日:1997-04-15

    Abstract: Provided is a method of treating an immune system disorder not involving T cell proliferation, comprising administering to the animal an immunotoxin comprising a mutant diphtheria toxin moiety linked to an antibody moiety which routes by the anti-CD3 pathway, or derivatives thereof under conditions such that the disorder is treated. Thus, the present method can treat graft-versus-host disease. Also provided is a method of inhibiting a rejection response by inducing immune tolerance in a recipient to a foreign mammalian donor tissue or cells, comprising the steps of: a) exposing the recipient to an immunotoxin so as to reduce the recipients's peripheral blood T-cell lymphocyte population by at least 80%, wherein the immunotoxin is anti-CD3 antibody linked to a diphtheria protein toxin, wherein the protein has a binding site mutation; and b) transplanting the donor cells into the recipient, whereby a rejection response by the recipient to the donor organ cell is inhibited, and the host is tolerized to the donor cell.

    Abstract translation: 提供了一种治疗不涉及T细胞增殖的免疫系统疾病的方法,包括对动物施用免疫毒素,所述免疫毒素包含与通过抗CD3途径途径的抗体部分连接的突变白喉毒素部分或其衍生物, 该疾病得到治疗。 因此,本方法可以治疗移植物抗宿主病。 还提供了通过在外来哺乳动物供体组织或细胞的受体中诱导免疫耐受来抑制排斥反应的方法,包括以下步骤:a)将受体暴露于免疫毒素以便减少受体的外周血T细胞 淋巴细胞群体至少80%,其中所述免疫毒素是与白喉蛋白毒素连接的抗CD3抗体,其中所述蛋白质具有结合位点突变; 和b)将供体细胞移植到受体中,由此受体对供体器官细胞的排斥反应被抑制,并且宿主对供体细胞是耐受的。

    Antibody conjugates reactive with human carcinomas
    7.
    发明授权
    Antibody conjugates reactive with human carcinomas 失效
    抗体结合物与人类癌反应

    公开(公告)号:US5869045A

    公开(公告)日:1999-02-09

    申请号:US459354

    申请日:1995-06-02

    Abstract: The present invention relates to novel antibodies, antibody fragments and antibody conjugates and single-chain immunotoxins reactive with human carcinoma cells. More particularly, the antibodies, conjugates and single-chain immunotoxins of the invention include: a murine monoclonal antibody, BR96; a human/murine chimeric antibody, ChiBR96; a F(ab').sub.2 fragment of BR96; ChiBR96-PE, ChiBR96-LysPE40, ChiBR96 F(ab').sub.2 -LysPE40 and ChiBR96 Fab'-LysPE40 conjugates and recombinant BR96 sFv-PE40 immunotoxin. These molecules are reactive with a cell membrane antigen on the surface of human carcinomas. The BR96 antibody and its functional equivalents, displays a high degree of selectivity for carcinoma cells and possess the ability to mediate antibody-dependent cellular cytotoxicity and complement-dependent cytotoxicity activity. In addition, the antibodies of the invention internalize within the carcinoma cells to which they bind and are therefore particularly useful for therapeutic applications, for example, as the antibody component of antibody-drug or antibody-toxin conjugates. The antibodies also have a unique feature in that they are cytotoxic when used in the unmodified form, at specified concentrations.

    Abstract translation: 本发明涉及与人癌细胞反应的新型抗体,抗体片段和抗体缀合物和单链免疫毒素。 更具体地,本发明的抗体,缀合物和单链免疫毒素包括:鼠单克隆抗体BR96; 人/鼠嵌合抗体,ChiBR96; BR96的F(ab')2片段; ChiBR96-PE,ChiBR96-LysPE40,ChiBR96F(ab')2-LysPE40和ChiBR96 Fab'-LysPE40缀合物和重组BR96sFv-PE40免疫毒素。 这些分子与人类癌症表面的细胞膜抗原反应。 BR96抗体及其功能等同物对癌细胞显示出高度的选择性,并具有介导抗体依赖性细胞毒性和补体依赖性细胞毒活性的能力。 此外,本发明的抗体内在于它们结合的癌细胞内,因此特别可用于治疗应用,例如作为抗体药物或抗体 - 毒素缀合物的抗体组分。 抗体还具有独特的特征,因为当以指定浓度以未修饰的形式使用时,它们是细胞毒性的。

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