PMID- 29870434 OWN - NLM STAT- MEDLINE DCOM- 20190520 LR - 20210109 IS - 1531-7013 (Electronic) IS - 1087-2418 (Print) IS - 1087-2418 (Linking) VI - 23 IP - 4 DP - 2018 Aug TI - Assessment of human leukocyte antigen immunogenicity: current methods, challenges and opportunities. PG - 477-485 LID - 10.1097/MOT.0000000000000544 [doi] AB - PURPOSE OF REVIEW: Donor-recipient human leukocyte antigen (HLA) matching improves outcomes after solid-organ transplantation, but current assessment of HLA incompatibility is inadequate as it does not consider the relative immunogenicity of individual HLA mismatches. In this article, we review existing strategies for assessing HLA immunogenicity and discuss current challenges and future opportunities in this field. RECENT FINDINGS: Current HLA immunogenicity algorithms focus primarily on the humoral component of the alloimmune response and aim to determine a measure of 'dissimilarity' between donor and recipient HLA. This can be achieved by deriving information from comparison of donor and recipient HLA at the amino acid sequence, structural and/or the physicochemical level, accounting for both B-cell and T-cell pathways of alloreactivity. Substantial evidence now supports the superiority of this molecular definition of HLA incompatibility, over conventional enumeration of HLA antigenic differences, for assessing the risk of humoral alloimmunity and for predicting graft outcomes after transplantation. SUMMARY: Significant progress has been made in developing computational HLA immunogenicity algorithms that offer exciting opportunities for a more rational approach to determining the degree of donor-recipient HLA incompatibility and to defining HLA-related immunological risk. A number of challenges now need to be overcome to enable their implementation into clinical practice. FAU - Copley, Hannah C AU - Copley HC AD - Department of Surgery, University of Cambridge and NIHR Cambridge Biomedical Research Centre, Cambridge University Hospitals NHS Foundation Trust, Addenbrooke's Hospital. FAU - Elango, Madhivanan AU - Elango M AD - Department of Surgery, University of Cambridge and NIHR Cambridge Biomedical Research Centre, Cambridge University Hospitals NHS Foundation Trust, Addenbrooke's Hospital. FAU - Kosmoliaptsis, Vasilis AU - Kosmoliaptsis V AD - Department of Surgery, University of Cambridge and NIHR Cambridge Biomedical Research Centre, Cambridge University Hospitals NHS Foundation Trust, Addenbrooke's Hospital. AD - NIHR Blood and Transplant Research Unit in Organ Donation and Transplantation at the University of Cambridge, Cambridge, UK. LA - eng GR - PDF-2016-09-065/DH_/Department of Health/United Kingdom 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 RN - 0 (HLA Antigens) SB - IM MH - HLA Antigens/*immunology MH - Histocompatibility MH - Histocompatibility Testing/*methods MH - Humans MH - Organ Transplantation/*methods MH - Tissue Donors MH - Transplantation Immunology PMC - PMC6082597 EDAT- 2018/06/06 06:00 MHDA- 2019/05/21 06:00 PMCR- 2018/08/08 CRDT- 2018/06/06 06:00 PHST- 2018/06/06 06:00 [pubmed] PHST- 2019/05/21 06:00 [medline] PHST- 2018/06/06 06:00 [entrez] PHST- 2018/08/08 00:00 [pmc-release] AID - MOT230406 [pii] AID - 10.1097/MOT.0000000000000544 [doi] PST - ppublish SO - Curr Opin Organ Transplant. 2018 Aug;23(4):477-485. doi: 10.1097/MOT.0000000000000544.