Isolation of the major IgE-binding protein from Parietaria judaica pollen using monoclonal antibodies.
Allergen molecules from Parietaria judaica pollen, a widely distributed allergy inducer in Southern and Western Europe, have been studied using specific monoclonal antibodies (MAbs). MAbs against IgE-binding components were selected in a 4-step radioimmunoassay. Three different MAbs (AC/1.1, AC/7.1 and AC/15.1) were obtained which recognized epitope(s) located on a polypeptide of 10 Kd (Pj10). This polypeptide displayed the highest IgE-binding ability under either native or SDS-denatured conditions, as determined by immunoadsorption and immunodetection after SDS-PAGE, respectively. The Pj10-containing allergen, purified on an AC/1.1 MAb-Sepharose column, was able to inhibit most of the binding of specific IgE to the pollen extract coupled to paper discs in an inhibition radioallergosorbent test (RAST). The affinity-purified allergen exhibited the same immunoelectrophoretic behaviour as the native allergen.
Corbí
A L
AL
Ley
V
V
Sanchez-Madrid
F
F
Carreira
J
J
D000485:Allergens / Q000276:immunology; D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D001667:Binding, Competitive; D004591:Electrophoresis, Polyacrylamide Gel; D000939:Epitopes; D006023:Glycoproteins / Q000276:immunology; D007122:Immunoelectrophoresis; D007073:Immunoglobulin E / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D010455:Peptides / Q000276:immunology; D010940:Plant Proteins / Q000276:immunology*; D011058:Pollen / Q000276:immunology*; D011852:Radioallergosorbent Test
D000485:Allergens; D000911:Antibodies, Monoclonal; D000939:Epitopes; D006023:Glycoproteins; D010455:Peptides; D010940:Plant Proteins; D007073:Immunoglobulin E