Mice deficient for Toll-like receptor 4 (TLR4) were immunized with spleen cells of congenic wildtype mice to obtain monoclonal antibodies. One of the obtained antibodies, called 8F11, was further characterized. Analysis of surface expression of 8F11 on different cell lines as well as on ex vivo leukocytes showed a differential expression on different cell types. The 8F11 antigen was expressed on macrophages and dendritic cells, however, the expression did not change with cell activation. Confocal microscopic studies revealed a strong cytoplasmic expression of the antigen in addition to its localization at the cell surface. Furthermore, immunoprecipitation studies were carried out to identify the 8F11 antigen. Several intracellular proteins have been identified, which may serve as candidates for interacting Proteins. Functional studies analyzing the induction of several cytokines and chemokines as well as the activation of MAP Kinases and NF-kB after 8F11 crosslink revealed, that 8F11-binding seems not to be involved in cellular activation processes of APC (antigen presenting cells).
«
Mice deficient for Toll-like receptor 4 (TLR4) were immunized with spleen cells of congenic wildtype mice to obtain monoclonal antibodies. One of the obtained antibodies, called 8F11, was further characterized. Analysis of surface expression of 8F11 on different cell lines as well as on ex vivo leukocytes showed a differential expression on different cell types. The 8F11 antigen was expressed on macrophages and dendritic cells, however, the expression did not change with cell activation. Confoca...
»