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  • Title: Differences in Graft-versus-Host Disease Characteristics between Haploidentical Transplantation Using Post-Transplantation Cyclophosphamide and Matched Unrelated Donor Transplantation Using Calcineurin Inhibitors.
    Author: Solh MM, Baron J, Zhang X, Bashey A, Morris LE, Holland HK, Solomon SR.
    Journal: Biol Blood Marrow Transplant; 2020 Nov; 26(11):2082-2088. PubMed ID: 32745575.
    Abstract:
    We assessed differences in presentation and response to therapy in 394 consecutive patients who developed acute or chronic graft-versus-host disease (GVHD) after receiving their first allogeneic transplantation (HSCT) from a 10/10 HLA allele-matched unrelated donor (MUD; n = 179) using calcineurin inhibitors or a T cell-replete haploidentical donor (haplo; n = 215) and post-transplantation cyclophosphamide at our center between 2005 and 2017. The median duration of follow-up for survivors was 52.5 months. The cumulative incidences for grade II-IV and grade III-IV acute GVHD at day 180 post HCT were similar, at 39% and 14%, respectively, for haplo-HSCT compared with 50% and 16% for MUD HSCT (P not significant). Haplo-HSCT recipients had a lower cumulative incidence of moderate to severe chronic GVHD, at 22% (severe, 19%), compared with 31% (severe, 29%) for MUD HSCT recipients (P = .026). The time to onset of moderate to severe chronic GVHD was faster for haplo-HSCT recipients (213 days versus 280 days; P = .011). Among patients with grade II-IV acute GVHD, there was no significant between-group difference in organ involvement, with skin the most affected (75% for haplo-HSCT versus 70% for MUD HSCT), followed by the gastrointestinal tract (71% versus 69%) and liver (14% versus 17% MUD). For chronic GVHD, haplo-HSCT recipients had less involvement of the eyes (46% versus 75% for MUD; P < .001) and of the joints/fascia (12% versus 36%; P = .001). Also for cGVHD patients, haplo-HSCT recipients and MUD HSCT recipients had similar all-cause mortality (22% versus 18%; P = .89), but the former were more likely to be off immunosuppression at 2 years post-HCT (63% versus 43%; P = .03) compared with MUD.
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