申请人:Biosite Diagnostics, Inc.
公开号:US05089391A1
公开(公告)日:1992-02-18
This invention is directed to a ligand-receptor assay for determining the presence or amount of at least one target ligand, capable of competing with a ligand analogue conjugate for binding sites available on a ligand receptor, said ligand analogue conjugate comprising at least one ligand analogue coupled to a signal development element capable of emitting a detectable signal, in a fluid sample suspected of containing said target ligand, comprising the steps of: a. contacting said fluid sample with ligand analogue conjugate and ligand receptor to form a reaction mixture, the relative amounts of ligand analogue conjugate and ligand receptor being such that in the absence of target ligand, and subsequent to substantially equilibrium binding, substantially all of the ligand analogue conjugate is bound to ligand receptor; b. detecting the unbound ligand analogue conjugate; c. relating the detectable signal to the presence or amount of target ligand in the fluid sample. In one embodiment an optional means also is employed for removing receptor from the reaction mixture. In related claimed assay formats the analyte of interest may be either ligand receptor or ligand.
本发明涉及一种配体-受体测定法,用于确定至少一种目标配体的存在或数量,该目标配体能够与配体类似物偶联物竞争配体受体上的结合位点,所述配体类似物偶联物包括至少一种配体类似物偶联到能够发出可检测信号的信号发展元素,用于检测疑似含有目标配体的流体样品,包括以下步骤:a.将所述流体样品与配体类似物偶联物和配体受体接触形成反应混合物,配体类似物偶联物和配体受体的相对量使得在缺乏目标配体且在基本平衡结合之后,几乎所有的配体类似物偶联物都与配体受体结合;b.检测未结合的配体类似物偶联物;c.将可检测信号与流体样品中的目标配体的存在或数量相关联。在一种实施方式中,还可以采用可选的方法从反应混合物中去除受体。在相关的声明测定格式中,感兴趣的分析物可以是配体受体或配体。