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  • Title: Multilayer peroxidase-labeled antibody method: comparison with labeled streptavidin-biotin method, avidin-biotin-peroxidase complex method, and peroxidase-antiperoxidase method.
    Author: Shin M, Izumi S, Nakane PK.
    Journal: J Clin Lab Anal; 1995; 9(6):424-30. PubMed ID: 8587013.
    Abstract:
    A new, extremely sensitive, "multilayer peroxidase-labeled antibody method" is introduced. This method utilizes peroxidase-labeled antibodies that immuno-react with their antigen, but also can be an antigen to other peroxidase-labeled antibodies. An example of this method is: use rabbit IgG as the first antibody, peroxidase-labeled goat antirabbit IgG as the second antibody, peroxidase-labeled rabbit antigoat IgG as the third antibody, peroxidase-labeled goat antirabbit IgG as the fourth antibody, and peroxidase-labeled rabbit antigoat IgG as the fifth antibody in succession. We compared the sensitivities of this multilayer peroxidase-labeled antibody method with that of commercially available immuno-peroxidase staining kits, i.e., avidin-biotin-complex method and peroxidase-antiperoxidase method, both by immunostaining and enzyme-linked immunosorbent assay. The generated signal and background in immunostained sections were determined by a computer-assisted image analyzer and by enzyme-linked immunosorbent assay spectrophotometrically. It was found that a maximum signal/background ratio was obtained with those sections reacted with the first four antibodies in succession by the multilayer peroxidase-labeled antibody method, and those reacted with the five antibodies in succession by the multilayer peroxidase-labeled antibody method in the enzyme-linked immunosorbent assay. Thus, the multilayer peroxidase-labeled antibody method is more sensitive than the avidin-biotin-complex method and the peroxidase-antiperoxidase method.
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