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Immunomodulation of GvH reaction in mice by Listeria monocytogenes
1Department of Immunology, University of Lódź.
In the first part of experiments the GvHR activity of the spleen cell suspensions from normal parental donors (Balb/c) or infected with Listeria monocytogenes was compared. GvHR was examined in (Balb/c X AKR) F1 mice. Full suspensions from these donors or depleted of adherent cells or with addition of macrophages were studied. It has been proved that adherent cells population plays a significant role in the GvHR development. The addition of syngeneic macrophages from F1 hybrids results in a greater augmentation of GvH reactivity of parental lymphocytes. However, the addition of macrophages harvested from F1 hybrids immunized with L. monocytogenes 7 days before, brings about a weaker GvH reaction. Spleen cells of parental donors injected with L. monocytogenes 5-6 days earlier induced stronger GvHR as compared with the splenocytes of normal donors. Similarly, F1 hosts treated with L. monocytogenes 3-5 days before injection of normal donor's spleen cells showed increased GvHR, but those infected 7-9 days before injection of spleen cells, developed only very weak GvHR.
In the first part of experiments the GvHR activity of the spleen cell suspensions from normal parental donors (Balb/c) or infected with Listeria monocytogenes was compared. GvHR was examined in (Balb/c X AKR) F1 mice. Full suspensions from these donors or depleted of adherent cells or with addition of macrophages were studied. It has been proved that adherent cells population plays a significant role in the GvHR development. The addition of syngeneic macrophages from F1 hybrids results in a greater augmentation of GvH reactivity of parental lymphocytes. However, the addition of macrophages harvested from F1 hybrids immunized with L. monocytogenes 7 days before, brings about a weaker GvH reaction. Spleen cells of parental donors injected with L. monocytogenes 5-6 days earlier induced stronger GvHR as compared with the splenocytes of normal donors. Similarly, F1 hosts treated with L. monocytogenes 3-5 days before injection of normal donor's spleen cells showed increased GvHR, but those infected 7-9 days before injection of spleen cells, developed only very weak GvHR.