Cell separation method using a release system for cell-antibody-substrate conjugates containing a polyethylene glycol spacer unit
申请人:Miltenyi Biotec GmbH
公开号:US10196631B2
公开(公告)日:2019-02-05
The invention is directed to a releasable conjugate comprising a biotinylated ligand having a biotin moiety, a ligand moiety (Ligand1) and a biotin-binding molecule (bbm) bound to the biotin moiety of the biotinylated ligand. The ligand moiety of the biotinylated ligand may be separated by a spacer group consisting of polyethylene glycol. Furthermore, the invention relates to a method for cleaving the releasable conjugate by providing biotin or streptavidin and an auxiliary release agent in a sufficient concentration to displace the biotin-binding molecule (bbm) from the biotin moiety of the biotinylated ligand and a method for separation of target cells from a cell sample utilizing the conjugate.
本发明涉及一种可释放的共轭物,包括具有生物素分子的生物素化配体、配体分子(Ligand1)和与生物素化配体的生物素分子结合的生物素结合分子(bbm)。生物素化配体的配体基团可由聚乙二醇组成的间隔基团隔开。此外,本发明还涉及一种通过提供足够浓度的生物素或链霉亲和素和辅助释放剂,使生物素结合分子(bbm)从生物素化配体的生物素分子中置换出来,从而裂解可释放共轭物的方法,以及利用该共轭物从细胞样本中分离靶细胞的方法。