Chimeric acceleration by donor CD4+CD25+T-reg depleted fraction in splenocyte transplantation

Inflammatory mediators in vascular disease: identifying promising targets for intracranial aneurysm research

Inflammatory processes are implicated in many diseases of the vasculature and have been shown to play a key role in the formation of intracranial aneurysms (IAs). Although the specific mechanisms underlying these processes have been thoroughly investigated in related pathologies, such as atherosclerosis, there remains a paucity of information regarding the immunopathology of IA. Cells such as macrophages and lymphocytes and their effector molecules have been suggested to be players in IA, but their specific interactions and the role of other components of the inflammatory response have yet to be determined. Drawing parallels between the pathogenesis of IA and other vascular disorders could provide a roadmap for developing a mechanistic understanding of the immunopathology of IA and uncovering useful targets for therapeutic intervention. Future research should address the presence and function of leukocyte subsets, mechanisms of leukocyte recruitment and activation, and the role of damage-associated molecular patterns in IA.

Donor-specific tolerance induction in organ transplantation via mixed splenocytes chimerism

We have shown previously that donor-derived splenocytes can replace recipients' bone marrow and induce donor-specific tolerance (DST). We have also shown the usefulness of the chimeric state for the induction of DST. Further analysis of mixed splenocytes chimera, especially the role of each T cells in mixed splenocytes chimera, is indispensable issue for its clinical use. A chimeric state has been shown to achieve long-term survival in major histocompatibility complex (MHC)-mismatched grafts. The donor-derived splenocytes can replace recipients' bone marrow and induce DST. The long-term survival of allogeneic skin grafts was achieved without immunosuppressants. In this study we show the role of each T cell type in a splenocyte mixed chimera. This review provides a short summary of our original work, adding some supplemental interpretations. Mixed chimerism is thus considered an attractive approach for the induction of DST without the use of immunosuppressants. In this paper, we summarize some of the findings on mixed splenocyte chimeras and review mixed chimerism in recent organ transplantation.