PMID- 26126194 OWN - NLM STAT- MEDLINE DCOM- 20151019 LR - 20181202 IS - 1531-7013 (Electronic) IS - 1087-2418 (Linking) VI - 20 IP - 4 DP - 2015 Aug TI - T-cell alloreactivity and transplantation outcome: a budding role for heterologous immunity? PG - 454-60 LID - 10.1097/MOT.0000000000000218 [doi] AB - PURPOSE OF REVIEW: Despite the association between alloreactive T cells and poor graft survival, the mechanisms behind T-cell-mediated rejection are still under investigation. In this review, we will discuss the latest insights into the impact of T-cell alloreactivity on solid organ transplantation and hematopoietic stem cell transplantation (HSCT), with special emphasis on the potential impact of heterologous immunity. RECENT FINDINGS: A large part of the memory T-cell repertoire is induced upon virus infections, and evidence for a role of T-cell receptor cross-reactivity of virus-induced memory T cells against allogeneic human leukocyte antigen (HLA) is accumulating in experimental and clinical solid organ transplantation studies. In HSCT, strong alloreactive potential of naive T cells causes concerns for graft-versus-host disease while additional HLA-DP matching is suggested to prevent CD4 alloreactivity. Furthermore, virus-induced memory T cells hamper mixed chimerism induction, pointing once more towards a role for heterologous immunity. SUMMARY: Both memory and naive T cells contribute to the alloimmune response after transplantation. Monitoring for T-cell phenotypes could help predict rejection episodes and/or graft-versus-host disease, allowing timely intervention. Tailoring donor lymphocyte infusions and additional HLA matching could prevent strong alloreactivity in HSCT. Furthermore, the potential role of heterologous immunity in T-cell alloreactivity and transplantation is gaining interest. FAU - van den Heuvel, Heleen AU - van den Heuvel H AD - Department of Immunohaematology and Blood Transfusion, Leiden University Medical Center, Leiden, the Netherlands. FAU - Heidt, Sebastiaan AU - Heidt S FAU - Roelen, Dave L AU - Roelen DL FAU - Claas, Frans H J AU - Claas FH LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - United States TA - Curr Opin Organ Transplant JT - Current opinion in organ transplantation JID - 9717388 SB - IM MH - Animals MH - Hematopoietic Stem Cell Transplantation/*adverse effects MH - Humans MH - *Immunity, Heterologous MH - Immunologic Memory MH - Organ Transplantation/*adverse effects MH - T-Lymphocytes/*immunology MH - Treatment Outcome EDAT- 2015/07/01 06:00 MHDA- 2015/10/20 06:00 CRDT- 2015/07/01 06:00 PHST- 2015/07/01 06:00 [entrez] PHST- 2015/07/01 06:00 [pubmed] PHST- 2015/10/20 06:00 [medline] AID - 10.1097/MOT.0000000000000218 [doi] PST - ppublish SO - Curr Opin Organ Transplant. 2015 Aug;20(4):454-60. doi: 10.1097/MOT.0000000000000218.