PMID- 29321773 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20191120 IS - 1664-3224 (Print) IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 8 DP - 2017 TI - The Potential of Donor T-Cell Repertoires in Neoantigen-Targeted Cancer Immunotherapy. PG - 1718 LID - 10.3389/fimmu.2017.01718 [doi] LID - 1718 AB - T cells can recognize peptides encoded by mutated genes, but analysis of tumor-infiltrating lymphocytes suggests that very few neoantigens spontaneously elicit T-cell responses. This may be an important reason why immune checkpoint inhibitors are mainly effective in tumors with a high mutational burden. Reasons for clinically insufficient responses to neoantigens might be inefficient priming, inhibition, or deletion of the cognate T cells. Responses can be dramatically improved by cancer immunotherapy such as checkpoint inhibition, but often with temporary effects. By contrast, T cells from human leukocyte antigen (HLA)-matched donors can cure diseases such as chronic myeloid leukemia. The therapeutic effect is mediated by donor T cells recognizing polymorphic peptides for which the donor and patient are disparate, presented on self-HLA. Donor T-cell repertoires are unbiased by the immunosuppressive environment of the tumor. A recent study demonstrated that T cells from healthy individuals are able to respond to neoantigens that are ignored by tumor-infiltrating T cells of melanoma patients. In this review, we discuss possible reasons why neoantigens escape host T cells and how these limitations may be overcome by utilization of donor-derived T-cell repertoires to facilitate rational design of neoantigen-targeted immunotherapy. FAU - Karpanen, Terhi AU - Karpanen T AD - Department of Cancer Immunology, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, and K.G. Jebsen Center for Cancer Immunotherapy, University of Oslo, Oslo, Norway. FAU - Olweus, Johanna AU - Olweus J AD - Department of Cancer Immunology, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, and K.G. Jebsen Center for Cancer Immunotherapy, University of Oslo, Oslo, Norway. LA - eng PT - Journal Article PT - Review DEP - 20171211 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 PMC - PMC5732232 OTO - NOTNLM OT - T cell OT - allogeneic hematopoietic stem cell transplantation OT - donor OT - donor lymphocyte infusion OT - graft versus tumor effect OT - immunotherapy OT - minor histocompatibility antigen OT - neoantigen EDAT- 2018/01/13 06:00 MHDA- 2018/01/13 06:01 PMCR- 2017/01/01 CRDT- 2018/01/12 06:00 PHST- 2017/09/08 00:00 [received] PHST- 2017/11/21 00:00 [accepted] PHST- 2018/01/12 06:00 [entrez] PHST- 2018/01/13 06:00 [pubmed] PHST- 2018/01/13 06:01 [medline] PHST- 2017/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2017.01718 [doi] PST - epublish SO - Front Immunol. 2017 Dec 11;8:1718. doi: 10.3389/fimmu.2017.01718. eCollection 2017.