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Use of anti-horseradish peroxidase antibody-gold complex in the ABC technique

B Gee, MJ Warhol and J Roth

Department of Pathology, Pennsylvania Hospital, Philadelphia.

We report a modification of the avidin-biotin-peroxidase complex (ABC) technique for the light and electron microscopic detection of antigens in tissue sections. An immunological approach was used instead of the DAB reaction to reveal ABC bound to antigen-antibody complexes. Affinity-purified polyclonal antibodies against horseradish peroxidase were complexed to particles of colloidal gold and applied for reaction with the horseradish peroxidase molecules of the ABC. For light microscopic immunolabeling, the signal produced by the anti-horseradish peroxidase antibody-gold complex required silver intensification. The ABC immunogold reaction as compared with the standard ABC technique, in particular with silver intensification of the DAB reaction product, provided superior resolution in paraffin sections. Furthermore, section pre-treatment to block endogenous peroxidase activity could be omitted and no potentially hazardous substrate was used. The ABC immunogold reaction was successfully applied for electron microscopic immunolabeling on Lowicryl K4M thin sections. We propose that the ABC immunogold reaction is a useful alternative to the standard ABC technique and can be equally well applied to light and electron microscopy.

Volume 39, Issue 6, pp. 863-869, 06/01/1991
Copyright © 1991 by The Histochemical Society


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