Monoclonal antibody specific for bovine CD 5 antigen which enhances mitogen-induced blastogenesis and IL-2 production

J J Letesson, A Mager, C Didembourg, A Depelchin

Research output: Contribution to journalArticlepeer-review

Abstract

This study reports on the functional characteristics of a bovine T-cell differentiation antigen recognized by the monoclonal antibody (mAb) 8C11. This mAb has previously been found to react with a 67-kD molecule shared by thymocytes and peripheral blood T cells and to be undetectable on the B cells of healthy animals. This antigen is also largely expressed on the B cells from bovine leukemia virus-infected animals. Molecules with a similar cell distribution have been described in other species (mouse, human, rat and sheep), and were termed CD5 molecules. In order to confirm the CD5-like nature of the target molecule recognized by 8C11, functional T-cell assays were carried out. We report here that this mAb, like its human and murine homologues, enhances the proliferative responses of T cells to mitogens or alloantigens but does not directly stimulate T-cell division. Moreover, we have shown an enhancing effect of this 8C11 mAb on bovine interleukin-2 production by concanavalin A-stimulated bovine peripheral blood mononuclear cells.
Original languageEnglish
Pages (from-to)249-57
Number of pages9
JournalVeterinary immunology and immunopathology
Volume25
Issue number3
Publication statusPublished - 1990

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