BCL1, a spontaneous B cell leukemia of BALB/c origin, is rejected by C.B-20 (Ighb, H-40b) but not BALB/c (IgHa, H-40a) mice. Adoptive transfer of C.B-20 anti-BCL1 effector cells specific for the minor histocompatibility Ag H-40a protects irradiated C.B-20 but not BALB/c recipients. Because C.B-20 donor cells could potentially generate graft-vs-host disease (GVHD) in BALB/c recipients, we investigated the possibility that GVHD prevents the anti-tumor effect. GVHD was induced in (C.B-20 x B10.D2)F1 [H-2(d), H-40b x H-2(d),H-40b) recipients after injection of B10.D2-primed C.B-20 donor cells. GVHD was indicated by the histologic appearance of tissue sections from C.B-20 donor cells. GVHD was indicated by the histologic appearance of tissue sections from C.B-20→F1 livers, target organs of GVHD, which showed a marked mononuclear cell infiltrate around the portal tracts and central veins. In addition, splenic lymphocytes from these mice had altered CD4/CD8 ratios and were unable to respond to the polyclonal activators Con A and LPS. The mitogen unresponsiveness was at least partially due to the presence of a suppressor cell, because proliferation of normal spleen cells to Con A and LPS was suppressed upon addition of C.B-20→F1 spleen cells. Further immune dysfunction was evident by the inability of T cells from mice with GVHD to generate a CTL response to H-2 alloantigens. Addition of C.B-20→F1 spleen cells to F1 responder cells at the induction of culture did not prevent generation of CTL, indicating that a suppressor cell was not responsible for the lack of CTL activity. In this setting of GVHD, F1 recipients were able to reject BCL1 upon adoptive transfer of C.B-20 anti-BCL1 effector cells. These data indicate that GVHD-induced immune dysfunction does not inhibit the activity of antileukemia T cells.
|Original language||English (US)|
|Number of pages||9|
|Journal||Journal of Immunology|
|State||Published - 1990|
ASJC Scopus subject areas
- Immunology and Allergy