title: Unresponsiveness to 2,4-dinitro-1-fluoro-benzene after treatment with monoclonal antibodies to leukocyte function-associated molecule-1 and intercellular adhesion molecule-1 during sensitization.
abstract: We have investigated whether hapten-specific unresponsiveness could be induced if the interaction between LFA-1 (CD11a/CD18) and intercellular adhesion molecule-1 (CD54) was disrupted by blocking mAbs given to mice during sensitization with 2,4-dinitro-1-fluorobenzene. An extended period of more than 11 days between the last i.p. injection of mAb and challenge was chosen to ensure that the mAb did not persist in the animals at the time of hapten challenge, as analyzed by flow cytometry and immunohistochemistry. The contact sensitivity response was significantly reduced (p < 0.001) when a combination of mAb FD441.8 against LFA-1 and mAb YNI/1.7.4 against intercellular adhesion molecule-1 was given during the sensitization phase compared with normal rat IgG-treated control animals. Furthermore, the animals were resistant to resensitization to the same hapten. This hyporesponsiveness was hapten specific, since the contact sensitivity reaction of mAb-treated mice to oxazolone was the same as that of normal rat IgG-treated control animals. Together these data indicate that inhibition of LFA-1/intercellular adhesion molecule-1 mediated interactions between APCs and T cells during sensitization induced long term, Ag-specific, hyporesponsiveness of mice to the hapten 2,4-dinitro-1-fluoro-benzene.
authors.affiliation: Laboratory of Cellular Physiology and Immunology, Rockefeller University, NY 10021, USA.
authors.forename: A
authors.initials: A
authors.lastname: Scheynius
authors.forename: R L
authors.initials: RL
authors.lastname: Camp
authors.forename: E
authors.initials: E
authors.lastname: Puré
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000008:administration & dosage*; D001667:Binding, Competitive / Q000276:immunology; D002465:Cell Movement / Q000276:immunology; D017449:Dermatitis, Allergic Contact / Q000473:pathology / Q000517:prevention & control; D004139:Dinitrofluorobenzene / Q000276:immunology*; D004338:Drug Combinations; D005260:Female; D006241:Haptens / Q000276:immunology; D006968:Hypersensitivity, Delayed / Q000473:pathology; D007108:Immune Tolerance; D007113:Immunity, Innate; D007114:Immunization; D018799:Intercellular Adhesion Molecule-1 / Q000276:immunology*; D016169:Lymphocyte Function-Associated Antigen-1 / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C
chemical_list: D000911:Antibodies, Monoclonal; D004338:Drug Combinations; D006241:Haptens; D016169:Lymphocyte Function-Associated Antigen-1; D018799:Intercellular Adhesion Molecule-1; D004139:Dinitrofluorobenzene