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.
J Immunol
; 156(5): 1804-9, 1996 Mar 01.
Article
in En
| MEDLINE
| ID: mdl-8596030
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.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Lymphocyte Function-Associated Antigen-1
/
Intercellular Adhesion Molecule-1
/
Dinitrofluorobenzene
/
Immune Tolerance
/
Antibodies, Monoclonal
Type of study:
Risk_factors_studies
Limits:
Animals
Language:
En
Journal:
J Immunol
Year:
1996
Document type:
Article
Affiliation country:
United States