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American Journal of Pathology, Vol 138, 983-990, Copyright © 1991 by American Society for Investigative Pathology

REGULAR ARTICLES

Characterization of target injury of murine acute graft-versus-host disease directed to multiple minor histocompatibility antigens elicited by either CD4+ or CD8+ effector cells

GF Murphy, D Whitaker, J Sprent and R Korngold
Department of Dermatology, University of Pennsylvania, Philadelphia.

The precise identity of effector mononuclear cells capable of eliciting acute graft-versus-host disease (AGVHD) is controversial. In this study, highly purified subsets of donor T cells were used to produce AGVHD to multiple minor histocompatibility (H) antigens in two strain combinations of mice matched for the major histocompatibility complex (MHC). In the C3H.SW- greater than B6 strain combination, only CD8+ effector cells produced histologic evidence of AGVHD in skin and liver, which peaked 3 weeks after transplant. In the B10.D2- greater than DBA/2 strain combination, CD4+ effector cells, and to a lesser extent, CD8+ cells, mediated disease in skin, liver, and intestine, which peaked during the fourth week after transplant. Analysis of skin and liver from both combinations showed target cell injury that was phenotypically similar and resembled that previously described in human disease in other studies. In addition, prominent epithelial injury also was detected in oropharyngeal mucosa, esophagus, hepatobiliary ducts, and seminal vesicle in both transplant settings. These findings indicate that functionally different subsets of donor T cells may be capable of initiating common pathways of cellular injury in selected target sites in AGVHD, and have potential implications for strategies that seek to ablate disease development by manipulation of donor marrow before transplantation.

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