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    • 3. 发明授权
    • Antigen-specific clonal expansion of B cells
    • B细胞的抗原特异性克隆扩增
    • US08945923B2
    • 2015-02-03
    • US13504638
    • 2010-10-29
    • Ugur SahinOzlem TureciTorsten SeppmannHolger HoffJens Schumacher
    • Ugur SahinOzlem TureciTorsten SeppmannHolger HoffJens Schumacher
    • A01N1/00C12N5/00C12N5/02C12N5/10C07K14/705
    • C07K14/70578C07K16/00C07K2319/30C12N5/0635
    • The present invention provides recombinant proteins comprising the amino acid sequence of an intracellular segment of CD40 and an amino acid sequence mediating the association of the recombinant protein with the constant region of an immunoglobulin heavy chain. The recombinant proteins according to the present invention are useful for inducing clonal expansion of a B cell having a predetermined antigen-specificity without the need for T cell or CD40L mediated co-stimulation. Thus, the present invention provides tools for clonal expansion of B cells specific for an antigen of interest and the production of B cells secreting antibodies specific for an antigen of interest. The recombinant proteins of the present invention may also be used for generating fully human monoclonal antibodies with a predetermined antigen-specificity from the B cell repertoire of a human subject.
    • 本发明提供重组蛋白,其包含CD40的细胞内节段的氨基酸序列和介导重组蛋白与免疫球蛋白重链的恒定区的缔合的氨基酸序列。 根据本发明的重组蛋白质可用于诱导具有预定抗原特异性的B细胞的克隆扩增,而不需要T细胞或CD40L介导的共刺激。 因此,本发明提供了用于针对感兴趣的抗原特异性的B细胞的克隆扩增的工具,以及产生分泌针对感兴趣的抗原的抗体的B细胞。 本发明的重组蛋白还可用于从人受试者的B细胞库中产生具有预定抗原特异性的完全人单克隆抗体。