Progression of alloresponse and tissue-specific immunity during graft coronary artery disease

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Abstract

Chronic rejection remains the major obstacle for long-term transplant survival. Both indirect alloresponse and tissue-specific autoimmunity have been implicated in its pathogenesis. The interrelationship between these two types of host anti-graft response remains poorly understood. We have developed an immunosuppression-free mouse model of graft coronary artery disease (GCAD), in which all FVB (H-2q) cardiac allografts placed into minor Ag (mHC)-mismatched DBA/1 (H-2q) hosts survived more than 112 days, and developed GCAD. We then examined the kinetics of both anti-mHC alloresponse and host autoimmunity against heart-specific antigen, cardiac myosin (CM). At 8 days post-transplantation, recipient mice showed minimal intragraft inflammation and apoptosis, and limited expansion of allo-specific T cells. In addition, we observed early production of anti-myosin IgG1 autoantibodies, which occurred in the absence of activated CM-specific T lymphocytes. By day 56, GCAD indices, the numbers of mHC- and CM-reactive T cells, and the levels of circulating allo-and CM-specific antibodies were all significantly increased. While host alloresponse was exhausted at 112 days post-transplant, T-cell reactivity against CM persisted. Our data suggest that both allo- and tissue-specific immunity might contribute to the induction of GCAD. They indicate that continual autoimmune response against graft tissue antigens may provide for GCAD sustenance. Copyright © Blackwell Munksgaard 2005.

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CITATION STYLE

APA

Tanaka, M., Zwierzchoniewska, M., Mokhtari, G. K., Terry, R. D., Balsam, L. B., Robbins, R. C., & Fedoseyeva, E. V. (2005). Progression of alloresponse and tissue-specific immunity during graft coronary artery disease. American Journal of Transplantation, 5(6), 1286–1296. https://doi.org/10.1111/j.1600-6143.2005.00880.x

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