Abstract
Hybridomas were produced after immunization with Der p I (Ag 42, P1). Specific anti-Der p I activity was detected in a reverse ELISA using immobilized anti-mouse Ig and highly purified Der p I labelled with horseradish peroxidase. Stable subclones from 6 parental hybridomas were obtained. The species specificities of the monoclonal antibodies (MABs) were classified: by an overlayer technique analogous to the CRIE technique, and by two competitive ELISA techniques. One MAB recognized an epitope specific for Dermatophagoides pteronyssinus. This MAB was successfully employed as a coating reagent in a species-specific ELISA for Der p I in house dust. The remaining antibodies reacted with epitopes shared to varying degrees by either of two other Dermatophagoides species. MABs recognizing epitopes common to all 3 species were not observed. Mutual cross-inhibition studies revealed four topographically distinct antibody binding sites on Der p I.
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