TY - JOUR AU - Hamers, Anouk A. J. AU - Joshi, Sunil K. AU - Pillai, Asha B. PY - 2019 DA - 2019/01/31 TI - Innate Immune Determinants of Graft-Versus-Host Disease and Bidirectional Immune Tolerance in Allogeneic Transplantation JO - OBM Transplantation SP - 044 VL - 03 IS - 01 AB - The success of organ and tissue transplantation from a healthy donor to a disease individual (allo-­‐ transplantation) is regulated via the immune systems of donor and recipient. To minimize deleterious immune reactivity between donor and recipient, the major obstacle in transplantation is to find a genetic match. Developing a state of specific non-­‐reactivity between donor and recipient, while maintaining the salutary effects of immune function in the recipient, is called “immune (transplantation) tolerance”. In the classic early post-­‐transplant period, minimizing bidirectional donor ←→ recipient reactivity requires the administration of immunosuppressive drugs which have deleterious side-­‐effects (severe immunodeficiency, neoplasia and opportunistic infections). Inducing immune tolerance directly through donor and recipient immune cells, particularly via subsets of immune regulatory cells, is evolving with great success, and has helped in significantly reducing the use immunosuppressive drugs in allo-­‐transplantation. The innate and adaptive arms of the immune system are both implicated in inducing immune tolerance. In the present article, we will review new developments in immune subset manipulations and immunotherapy (both innate and adaptive) which can induce durable immune tolerance after cell or tissue transplantation. These cellular immunotherapeutic strategies include invariant Natural Killer T (iNKT) cells, regulatory macrophages (MØregs), tolerogenic dendritic cells (tDCs), myeloid-­‐derived suppressor cells (MDSCs), mesenchymal stromal cells (MSCs), Natural Killer (NK) cells, gamma delta T (γδ-­‐T) cells, regulatory T and B cells (Tregs and Bregs), Type-­‐1 Regulatory T (Tr1) cells, and regulatory follicular helper T cells (Tfr) to promote long-­‐term immune tolerance in allo-­‐ transplantation. SN - 2577-5820 UR - https://doi.org/10.21926/obm.transplant.1901044 DO - 10.21926/obm.transplant.1901044 ID - Hamers2019 ER -