The Journal of Experimental Medicine
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Journal of Experimental Medicine, Vol 149, 137-149, Copyright © 1979 by Rockefeller University Press

ARTICLES

The role of H-2 and Ia antigens in graft-versus-host reactions (GVHR). Presence of host alloantigens on donor cells after GVHR and suppression of GVHR with an anti-Ia antiserum against hose Ia antigens

GH Prud'homme, U Sohn and TL Delovitch

By using an indirect immunofluorescence technique, the presence of host cell derived H-2K, H-2D, and Ia alloantigens on donor cells recovered from recipient spleens after a graft-versus-host response (GVHR) was demonstrated. Mapping studies indicated that only host K, D, and I-A region gene products could be identified on the donor cells. Host I-E/C- and I-J-subregion products were not absorbed by donor cells. Treatment of activated donor cells with anti-Ly sera plus C' revealed that donor cells carrying host Ia antigens have a Ly-1+,2-,3- phenotype, whereas donor cells carrying H-2K and H-2D host antigens have a Ly-1-,2+,3+ phenotype. A GVHR that resulted from only an I-region incompatibility was suppressed by the injection of recipient mice with an anti-Ia antiserum directed against self Ia antigens. The degree of suppression was proportional to the amount of anti-Ia antiserum administered.
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