Antibody against the Leu-CAM beta-chain (CD18) promotes both LFA-1- and CR3-dependent adhesion events.
1992
The Leukocytic cell-adhesion molecule (beta 2 integrin) family of adhesion molecules play a key role in the intercellular adhesive interactions necessary for normal immune cell function. In this study, we report an antibody that recognizes an epitope on the Leukocytic cell-adhesion molecule common beta-chain (CD18) and promotes both lymphocyte function-associated Ag-1- and CR3-dependent adhesion events. The antibody recognizes a temperature-sensitive epitope that is not dependent on the presence of divalent cations. It is proposed that antibody binding promotes a conformational change in both lymphocyte function-associated Ag-1 and CR3, which may mimic a natural activation mechanism, resulting in increased cellular adhesion.
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