PMID- 31135563 OWN - NLM STAT- MEDLINE DCOM- 20200408 LR - 20200408 IS - 1531-7013 (Electronic) IS - 1087-2418 (Linking) VI - 24 IP - 4 DP - 2019 Aug TI - Epitope matching in kidney transplantation: recent advances and current limitations. PG - 370-377 LID - 10.1097/MOT.0000000000000657 [doi] AB - PURPOSE OF REVIEW: Evolution of human leukocyte antigen (HLA) molecular typing techniques has progressively enabled more accurate determination of the three-dimensional building blocks that form the antibody accessibility and binding sites of each HLA allele. These immunogenic HLA regions known as epitopes are composed of polymorphic sequences of amino acid residues termed eplets. This review provides a critical appraisal of the current understanding of epitope compatibility in kidney transplantation. RECENT FINDINGS: There is a tendency to suggest that epitope matching is likely to be superior to broad antigen HLA matching such that the allocation of donor kidneys to patients with a more favorable epitope compatibility profile may lead to better allograft outcomes. A growing body of work has highlighted the association between a greater number of eplet mismatches and adverse allograft outcomes, and approaches using eplet matching have been successfully implemented in organ allocation programs. However, our understanding of epitope compatibility remains in its infancy, requiring further and more in-depth evaluation. Critically, it remains unclear how best to translate findings derived at the population level to the care of individual patients. Questions that need to be answered include a lack of consensus in the definition and interpretation of epitope compatibility, are class I and II compatibility of similar clinical importance, how best to define predetermined mismatch thresholds for utilization in organ allocation, and whether other properties such as differences in electrostatic potential between donor and recipient HLA alleles are also important in determining immunological compatibility. SUMMARY: Epitope matching likely represents a valid progression in understanding donor-recipient HLA compatibility. However, more clinical data and a better understanding about differences in methods to determine epitope compatibility are required before the approach can be widely applied in clinical practice. FAU - Larkins, Nicholas G AU - Larkins NG AD - Department of Nephrology, Perth Children's Hospital. AD - School of Paediatrics and Child Health. FAU - Wong, Germaine AU - Wong G AD - Sydney School of Public Health, University of Sydney. AD - Centre for Kidney Research, The Children's Hospital at Westmead and the Centre for Transplant and Renal Research. FAU - Taverniti, Anne AU - Taverniti A AD - New South Wales Transplantation & Immunogenetics Services, Australian Red Cross Blood Service, Sydney, Australia. FAU - Lim, Wai H AU - Lim WH AD - School of Medicine, University of Western Australia. AD - Department of Renal Medicine, Sir Charles Gardiner Hospital, Perth. 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 RN - 0 (Epitopes) SB - IM MH - Epitopes/*immunology MH - Histocompatibility Testing/*methods MH - Humans MH - Kidney Transplantation/*methods EDAT- 2019/05/29 06:00 MHDA- 2020/04/09 06:00 CRDT- 2019/05/29 06:00 PHST- 2019/05/29 06:00 [pubmed] PHST- 2020/04/09 06:00 [medline] PHST- 2019/05/29 06:00 [entrez] AID - 10.1097/MOT.0000000000000657 [doi] PST - ppublish SO - Curr Opin Organ Transplant. 2019 Aug;24(4):370-377. doi: 10.1097/MOT.0000000000000657.