The role of stress protein-reactive gammadeltaT cells in infection

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We have reported that gammadeltaT cells reactive to stress protein increase at early stage of Listeriainfection. We also found that stress protein-reactive gammadeltaT cells increase in syngeneic mixed lymphocyte reaction (MLR). From the observations, we estimated that self stress protein/bacterial stress protein-cross reactive gammadeltaT cells increase after bacterial infection. Therefore we analyzed self-reactive gammadeltaT cells to know further characteristics of stress protein-reactive gammadeltaT cells.We establisher 8 self-reactive gammadeltaT cell hybridomas. Four hybridomas expressed Vdelta5 and four hybridomas expressed Vdelta6. Response of seven out of eight self-reactive gammadeltaT cell hybridomas was blocked by anti stress protein (Hsp60) -monoclonal antibody ML30. Since response of gammadeltaT cell hybridomas with different T cell receptor was blocked with the ML30 antibody, we reasoned that Hsp60 molecule, but not ML30 epitope of Hsp60, participate in antigen recognition by the gammadeltaT cell hybridomas.