title: Monoclonal antibodies to the major Lolium perenne (rye grass) pollen allergen Lol p I (Rye I).
abstract: Thirteen monoclonal antibodies (MAbs) were produced against Lol p I (Rye I), the major Lolium perenne (rye grass) pollen allergen. Spleen cells from A/J and SJL mice immunized with highly purified Lol p I (Lol I) were allowed to fuse with cells from the non-secreting Sp2/0-Ag14 myeloma cell line. Each MAb was analyzed for antigenic specificity by radioimmunoassay (RIA) using 125I-Lol I. The epitope specificities of seven of the MAbs were examined by competitive binding against a labelled standard MAb for the Lol I antigen (Ag). The dissociation constant, Kd, of one MAb (No. 3.2) that was studied most extensively was determined by double Ab RIA to be 3.5 X 10(-6) L/M. This MAb recognized the related 27,000-30,000 Group I glycoproteins found in the pollens of nine other species of grass pollens tested, including weak binding to Bermuda grass Group I (Cyn d I), which by conventional analysis using polyclonal anti-Lol I serum shows no detectable binding. Monoclonal antibody No. 3.2 was coupled covalently to Sepharose 4B and used to prepare highly purified Lol I from a partially purified rye pollen extract. Finally, an RIA was developed which permitted the analysis of the Group I components in rye grass and nine other grass pollen species. The latter assay is likely to prove useful in the standardization of grass pollen extracts according to their Group I contents.
mesh_terms: D000485:Allergens; D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology* / Q000302:isolation & purification; D000915:Antibody Affinity; D052179:Antigens, Plant; D001202:Ascitic Fluid / Q000276:immunology; D002846:Chromatography, Affinity; D002848:Chromatography, DEAE-Cellulose; D003429:Cross Reactions; D000939:Epitopes / Q000032:analysis; D005260:Female; D051379:Mice; D008815:Mice, Inbred Strains; D010940:Plant Proteins; D011058:Pollen / Q000276:immunology*
chemical_list: D000485:Allergens; D000911:Antibodies, Monoclonal; D052179:Antigens, Plant; D000939:Epitopes; C042814:Lol p I protein, Lolium perenne; D010940:Plant Proteins