A method of assay for antigen comprising the following processes (A), (B), (C) and (D):
Process (A): A process in which the antigen to be assayed in the subject solution is bound with a functional group or marker to form a modified antigen.
Process (B) : A process in which the modified antigen is bound to a carrier via an antibody against the antigen and then the carrier is separated from the subject solution.
Process (C): The following process (a) or (b):
(a) A process in which the modified antigen is diassociated from the carrier.
(b) A process in which the modified antigen-antibody complex comprising the modified antigen and the antibody against the antigen is diassociated from the carrier.
Process (D): A process in which the modified antigen or modified antigen-antibody complex of Process (C) is assayed.
This method permits assay for antigens with high sensitivity based on characteristic features of the sandwich method, using an antibody against a single epitopic site, and also permits assay for low molecular substances, which have never been assayed by the conventional sandwich method, with higher sensitivity in comparison with the conventional competitive method.
一种检测抗原的方法,包括以下过程(A)、(B)、(C)和(D):
过程(A):将待测溶液中的抗原与官能团或标记物结合形成修饰抗原的过程。
过程 (B) :经修饰的抗原通过抗原
抗体与载体结合,然后将载体与受试溶液分离的过程。
过程(C):以下过程(a)或(b):
(a) 经修饰的抗原与载体分离的过程。
(b) 包含修饰抗原和抗原
抗体的修饰抗原-
抗体复合物与载体分离的过程。
过程(D):对过程(C)中的修饰抗原或修饰抗原-
抗体复合物进行检测的过程。
根据夹心法的特点,使用针对单个表位的
抗体,这种方法可对抗原进行高灵敏度的化验,还可对传统夹心法从未化验过的低分子物质进行化验,与传统竞争法相比,灵敏度更高。