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    • 5. 发明授权
    • Soluble divalent and multivalent heterodimeric analogs of proteins
    • 蛋白质的可溶性二价和多价异二聚体类似物
    • US06448071B1
    • 2002-09-10
    • US09324782
    • 1999-06-03
    • Jonathan SchneckSean O'Herrin
    • Jonathan SchneckSean O'Herrin
    • C12N1563
    • C07K14/7051A61K38/00A61K39/00A61K2039/605A61K2039/6056C07K14/70539C07K2319/00C07K2319/30C12N2799/026
    • Specificity in immune responses is in part controlled by the selective interaction of T cell receptors with their cognate ligands, peptide/MHC molecules. The discriminating nature of this interaction makes these molecules, in soluble form, good candidates for selectively regulating immune responses. Attempts to exploit soluble analogs of these proteins has been hampered by the intrinsic low avidity of these molecules for their ligands. To increase the avidity of soluble analogs for their cognates to biologically relevant levels, divalent peptide/MHC complexes or T cell receptors (superdimers) were constructed. Using a recombinant DNA strategy, DNA encoding either the MHC class II/peptide or TCR heterodimers was ligated to DNA coding for murine Ig heavy and light chains. These constructs were subsequently expressed in a baculovirus expression system. Enzyme-linked immunosorbant assays (ELISA) specific for the Ig and polymorphic determinants of either the TCR or MHC fraction of the molecule indicated that infected insect cells secreted approximately 1 &mgr;g/ml of soluble, conformationally intact chimeric superdimers. SDS PAGE gel analysis of purified protein showed that expected molecular weight species. The results of flow cytometry demonstrated that the TCR and class II chimeras bound specifically with high avidity to cells bearing their cognate receptors. These superdimers will be useful for studying TCR/MHC interactions, liymphocyte tracking, identifying new antigens, and have possible uses as specific regulators of immune responses.
    • 免疫应答的特异性部分由T细胞受体与其同源配体,肽/ MHC分子的选择性相互作用控制。 这种相互作用的区别性质使得这些分子以可溶形式是选择性调节免疫应答的良好候选物。 利用这些蛋白质的可溶性类似物的尝试受到这些分子对其配体的固有低亲合力的阻碍。 为了将可溶性类似物的同源物的亲合力提高到生物相关水平,构建了二价肽/ MHC复合物或T细胞受体(superdimers)。 使用重组DNA策略,将编码MHC II类/肽或TCR异源二聚体的DNA连接到编码鼠Ig重链和轻链的DNA。 这些构建体随后在杆状病毒表达系统中表达。 对分子的TCR或MHC级分的Ig和多态性决定簇特异的酶联免疫吸附测定(ELISA)表明感染的昆虫细胞分泌约1μg/ ml的可溶性,构象完整的嵌合超聚体。 纯化蛋白的SDS PAGE凝胶分析显示预期的分子量物种。 流式细胞术的结果表明,TCR和II类嵌合体具有高亲和力特异性结合携带其同源受体的细胞。 这些超模对于研究TCR / MHC相互作用,淋巴细胞跟踪,鉴定新抗原以及可能用作免疫应答的特异性调节剂将是有用的。
    • 9. 发明授权
    • Soluble divalent and multivalent heterodimeric analogs of proteins
    • 蛋白质的可溶性二价和多价异二聚体类似物
    • US6015884A
    • 2000-01-18
    • US828712
    • 1997-03-28
    • Jonathan SchneckSean O'Herrin
    • Jonathan SchneckSean O'Herrin
    • C12N15/09A61K38/00A61K39/00A61K39/395A61P37/00C07K14/725C07K14/74C07K16/18C07K19/00C12N5/10C12N15/62C12P21/02C12P21/08G01N33/531C07K16/00
    • C07K14/7051C07K14/70539A61K2039/605A61K2039/6056A61K38/00A61K39/00C07K2319/00C07K2319/30C12N2799/026
    • Specificity in immune responses is in part controlled by the selective interaction of T cell receptors with their cognate ligands, peptide/MHC molecules. The discriminating nature of this interaction makes these molecules, in soluble form, good candidates for selectively regulating immune responses. Attempts to exploit soluble analogs of these proteins has been hampered by the intrinsic low avidity of these molecules for their ligands. To increase the avidity of soluble analogs for their cognates to biologically relevant levels, divalent peptide/MHC complexes or T cell receptors (superdimers) were constructed. Using a recombinant DNA strategy, DNA encoding either the MHC class II/peptide or TCR heterodimers was ligated to DNA coding for murine Ig heavy and light chains. These constructs were subsequently expressed in a baculovirus expression system. Enzyme-linked immunosorbant assays (ELISA) specific for the Ig and polymorphic determinants of either the TCR or MHC fraction of the molecule indicated that infected insect cells secreted approximately 1 .mu.g/ml of soluble, conformationally intact chimeric superdimers. SDS PAGE gel analysis of purified protein showed that expected molecular weight species. The results of flow cytometry demonstrated that the TCR and class II chimeras bound specifically with high avidity to cells bearing their cognate receptors. These superdimers will be useful for studying TCR/MHC interactions, lymphocyte tracking, identifying new antigens, and have possible uses as specific regulators of immune responses.
    • 免疫应答的特异性部分由T细胞受体与其同源配体,肽/ MHC分子的选择性相互作用控制。 这种相互作用的区别性质使得这些分子以可溶形式是选择性调节免疫应答的良好候选物。 利用这些蛋白质的可溶性类似物的尝试受到这些分子对其配体的固有低亲合力的阻碍。 为了将可溶性类似物的同源物的亲合力提高到生物相关水平,构建了二价肽/ MHC复合物或T细胞受体(superdimers)。 使用重组DNA策略,将编码MHC II类/肽或TCR异源二聚体的DNA连接到编码鼠Ig重链和轻链的DNA。 这些构建体随后在杆状病毒表达系统中表达。 特异于分子的TCR或MHC级分的Ig和多态性决定簇的酶联免疫吸附测定(ELISA)表明感染的昆虫细胞分泌约1μg/ ml的可溶性,构象完整的嵌合超聚体。 纯化蛋白的SDS PAGE凝胶分析显示预期的分子量物种。 流式细胞术的结果表明,TCR和II类嵌合体具有高亲和力特异性结合携带其同源受体的细胞。 这些超模对于研究TCR / MHC相互作用,淋巴细胞跟踪,鉴定新抗原以及可能用作免疫应答的特异性调节剂将是有用的。