Ligand antagonists for treatment of breast cancer
    55.
    发明授权
    Ligand antagonists for treatment of breast cancer 失效
    用于治疗乳腺癌的配体拮抗剂

    公开(公告)号:US06429186B1

    公开(公告)日:2002-08-06

    申请号:US08308879

    申请日:1994-09-19

    IPC分类号: A01N3718

    摘要: We have discovered that growth hormones form ternary complexes with their receptors in which site 1 on the hormone first binds to one molecule of receptor and then hormone site 2 then binds to another molecule of receptor, thereby producing a 1:2 complex. We believe this phenomenon is shared by other ligands having similar conformational structure. Assays based on this phenomenon are useful for identifying ligand agonists and antagonists. Sites 1 and 2 are structurally identified to facilitate generation of amino acid sequence variants of ternary complex-forming ligands. Novel variants of growth hormone, prolactin placental lactogen and other related ligands are provided. As a result of our studies with the ternary complex we have determined that selected antibodies to the receptor for these ligands are capable of acting as ligand agonists or antagonists. Novel growth hormones and novel uses for anti-growth hormone receptor antibodies are described. Methods for inhibiting the growth of breast cancer cells are also described.

    摘要翻译: 我们发现生长激素与其受体形成三元复合物,其中激素上的位点1首先与一个受体分子结合,然后激素位点2然后结合另一个受体分子,从而产生1:2复合物。 我们认为这种现象由具有相似构象结构的其他配体共享。 基于此现象的分析可用于鉴定配体激动剂和拮抗剂。 在结构上鉴定了位点1和2,以便于产生三元复合物形成配体的氨基酸序列变体。 提供了生长激素,催乳素胎盘乳酸和其他相关配体的新型变体。 作为我们用三元复合物研究的结果,我们确定了这些配体的受体的选定抗体能够作为配体激动剂或拮抗剂。 描述了抗生长激素受体抗体的新型生长激素和新用途。 还描述了抑制乳腺癌细胞生长的方法。

    Method for identifying active domains and amino acid residues in polypeptides and hormone variants
    56.
    发明授权
    Method for identifying active domains and amino acid residues in polypeptides and hormone variants 失效
    用于鉴定多肽和激素变体中活性结构域和氨基酸残基的方法

    公开(公告)号:US06428954B1

    公开(公告)日:2002-08-06

    申请号:US08483039

    申请日:1995-06-06

    IPC分类号: C12Q168

    摘要: The invention provides methods for the systematic analysis of the structure and function of polypeptides by identifying active domains which influence the activity of the polypeptide with a target substance. Such active domains are determined by substituting selected amino acid segments of the polypeptide with an analogous polypeptide segment from an analog to the polypeptide. The analog has a different activity with the target substance as compared to the parent polypeptide. The activities of the segment-substituted polypeptides are compared to the same activity for the parent polypeptide for the target. A comparison of such activities provides an indication of the location of the active domain in the parent polypeptide. The invention also provides methods for identifying the active amino acid residues within the active domain of the parent polypeptide. The method comprises substituting a scanning amino acid for one of the amino acid residues within the active domain of the parent polypeptide and assaying the residue-substituted polypeptide so formed with a target substance. The invention further provides polypeptide variants comprising segment-substituted and residue-substituted growth hormones, prolactens and placental lactogens.

    摘要翻译: 本发明提供了通过鉴定影响多肽与靶物质的活性的活性结构域来系统分析多肽的结构和功能的方法。 通过用类似物与多肽的类似多肽片段取代多肽的选定氨基酸片段来确定此类活性结构域。 与亲本多肽相比,类似物与目标物质具有不同的活性。 将段取代的多肽的活性与目标的亲本多肽的相同活性进行比较。 这些活性的比较提供了活性结构域在亲本多肽中的位置的指示。 本发明还提供鉴定亲本多肽活性结构域内活性氨基酸残基的方法。 该方法包括用扫描氨基酸取代母体多肽的活性结构域内的氨基酸残基之一,并测定与靶物质形成的残基取代的多肽。 本发明进一步提供了包含片段取代和残基取代的生长激素,催乳激素和胎盘乳糖的多肽变体。