TY - JOUR
T1 - Allocation to highly sensitized patients based on acceptable mismatches results in low rejection rates comparable to nonsensitized patients
AU - Heidt, Sebastiaan
AU - Haasnoot, Geert W.
AU - Witvliet, Marian D.
AU - van der Linden-van Oevelen, Marissa J. H.
AU - Kamburova, Elena G.
AU - Wisse, Bram W.
AU - Joosten, Irma
AU - Allebes, Wil A.
AU - van der Meer, Arnold
AU - Hilbrands, Luuk B.
AU - Baas, Marije C.
AU - Spierings, Eric
AU - Hack, Cornelis E.
AU - van Reekum, Franka E.
AU - van Zuilen, Arjan D.
AU - Verhaar, Marianne C.
AU - Bots, Michiel L.
AU - Drop, Adriaan C. A. D.
AU - Plaisier, Loes
AU - Seelen, Marc A. J.
AU - Sanders, Jan-Stephan
AU - Hepkema, Bouke G.
AU - Lambeck, Annechien J. A.
AU - Bungener, Laura B.
AU - Roozendaal, Caroline
AU - Tilanus, Marcel G. J.
AU - Voorter, Christina E.
AU - Wieten, Lotte
AU - van Duijnhoven, Elly M.
AU - Gelens, Marielle A. C. J.
AU - Christiaans, Maarten H. L.
AU - van Ittersum, Frans J.
AU - Nurmohamed, Shaikh A.
AU - Lardy, Neubury M.
AU - Swelsen, Wendy
AU - van der Pant, Karlijn A. M. I.
AU - van der Weerd, Neelke C.
AU - ten Berge, Ineke J. M.
AU - Bemelman, Frederike J.
AU - Hoitsma, Andries
AU - van der Boog, Paul J. M.
AU - de Fijter, Johan W.
AU - Betjes, Michiel G. H.
AU - Otten, Henny G.
AU - Roelen, Dave L.
AU - Claas, Frans H. J.
PY - 2019/10
Y1 - 2019/10
N2 - Whereas regular allocation avoids unacceptable mismatches on the donor organ, allocation to highly sensitized patients within the Eurotransplant Acceptable Mismatch (AM) program is based on the patient's HLA phenotype plus acceptable antigens. These are HLA antigens to which the patient never made antibodies, as determined by extensive laboratory testing. AM patients have superior long-term graft survival compared with highly sensitized patients in regular allocation. Here, we questioned whether the AM program also results in lower rejection rates. From the PROCARE cohort, consisting of all Dutch kidney transplants in 1995-2005, we selected deceased donor single transplants with a minimum of 1 HLA mismatch and determined the cumulative 6-month rejection incidence for patients in AM or regular allocation. Additionally, we determined the effect of minimal matching criteria of 1 HLA-B plus 1 HLA-DR, or 2 HLA-DR antigens on rejection incidence. AM patients showed significantly lower rejection rates than highly immunized patients in regular allocation, comparable to nonsensitized patients, independent of other risk factors for rejection. In contrast to highly sensitized patients in regular allocation, minimal matching criteria did not affect rejection rates in AM patients. Allocation based on acceptable antigens leads to relatively low-risk transplants for highly sensitized patients with rejection rates similar to those of nonimmunized individuals.
AB - Whereas regular allocation avoids unacceptable mismatches on the donor organ, allocation to highly sensitized patients within the Eurotransplant Acceptable Mismatch (AM) program is based on the patient's HLA phenotype plus acceptable antigens. These are HLA antigens to which the patient never made antibodies, as determined by extensive laboratory testing. AM patients have superior long-term graft survival compared with highly sensitized patients in regular allocation. Here, we questioned whether the AM program also results in lower rejection rates. From the PROCARE cohort, consisting of all Dutch kidney transplants in 1995-2005, we selected deceased donor single transplants with a minimum of 1 HLA mismatch and determined the cumulative 6-month rejection incidence for patients in AM or regular allocation. Additionally, we determined the effect of minimal matching criteria of 1 HLA-B plus 1 HLA-DR, or 2 HLA-DR antigens on rejection incidence. AM patients showed significantly lower rejection rates than highly immunized patients in regular allocation, comparable to nonsensitized patients, independent of other risk factors for rejection. In contrast to highly sensitized patients in regular allocation, minimal matching criteria did not affect rejection rates in AM patients. Allocation based on acceptable antigens leads to relatively low-risk transplants for highly sensitized patients with rejection rates similar to those of nonimmunized individuals.
KW - alloantibody
KW - clinical research
KW - practice
KW - histocompatibility
KW - immunogenetics
KW - kidney transplantation
KW - nephrology
KW - major histocompatibility complex (MHC)
KW - rejection
KW - DONOR-SPECIFIC ANTIBODIES
KW - MATERNAL HLA ANTIGENS
KW - CLINICAL-RELEVANCE
KW - KIDNEY ALLOCATION
KW - RISK
KW - TRANSPLANTATION
KW - SURVIVAL
KW - PROGRAM
U2 - 10.1111/ajt.15486
DO - 10.1111/ajt.15486
M3 - Article
C2 - 31155833
SN - 1600-6135
VL - 19
SP - 2926
EP - 2933
JO - American Journal of Transplantation
JF - American Journal of Transplantation
IS - 10
ER -