PMID- 35467818 OWN - NLM STAT- MEDLINE DCOM- 20220623 LR - 20220729 IS - 2542-5641 (Electronic) IS - 0366-6999 (Print) IS - 0366-6999 (Linking) VI - 135 IP - 8 DP - 2022 Apr 20 TI - Haploidentical transplantation has a superior graft-versus-leukemia effect than HLA-matched sibling transplantation for Ph- high-risk B-cell acute lymphoblastic leukemia. PG - 930-939 LID - 10.1097/CM9.0000000000001852 [doi] AB - BACKGROUND: Compared with human leukocyte antigen (HLA)-matched sibling donor (MSD) transplantation, it remains unclear whether haploidentical donor (HID) transplantation has a superior graft-versus-leukemia (GVL) effect for Philadelphia-negative (Ph-) high-risk B-cell acute lymphoblastic leukemia (B-ALL). This study aimed to compare the GVL effect between HID and MSD transplantation for Ph- high-risk B-ALL. METHODS: This study population came from two prospective multicenter trials (NCT01883180, NCT02673008). Immunosuppressant withdrawal and prophylactic or pre-emptive donor lymphocyte infusion (DLI) were administered in patients without active graft-versus-host disease (GVHD) to prevent relapse. All patients with measurable residual disease (MRD) positivity posttransplantation (post-MRD+) or non-remission (NR) pre-transplantation received prophylactic/pre-emptive interventions. The primary endpoint was the incidence of post-MRD+. RESULTS: A total of 335 patients with Ph- high-risk B-ALL were enrolled, including 145 and 190, respectively, in the HID and MSD groups. The 3-year cumulative incidence of post-MRD+ was 27.2% (95% confidence interval [CI]: 20.2%-34.7%) and 42.6% (35.5%-49.6%) in the HID and MSD groups (P = 0.003), respectively. A total of 156 patients received DLI, including 60 (41.4%) and 96 (50.5%), respectively, in the HID and MSD groups (P = 0.096). The 3-year cumulative incidence of relapse was 18.6% (95% CI: 12.7%-25.4%) and 25.9% (19.9%-32.3%; P = 0.116) in the two groups, respectively. The 3-year overall survival (OS) was 67.4% (95% CI: 59.1%-74.4%) and 61.6% (54.2%-68.1%; P = 0.382), leukemia-free survival (LFS) was 63.4% (95% CI: 55.0%-70.7%) and 58.2% (50.8%-64.9%; P = 0.429), and GVHD-free/relapse-free survival (GRFS) was 51.7% (95% CI: 43.3%-59.5%) and 37.8% (30.9%-44.6%; P = 0.041), respectively, in the HID and MSD groups. CONCLUSION: HID transplantation has a lower incidence of post-MRD+ than MSD transplantation, suggesting that HID transplantation might have a superior GVL effect than MSD transplantation for Ph- high-risk B-ALL patients. TRIAL REGISTRATION: ClinicalTrials.gov: NCT01883180, NCT02673008. CI - Copyright (c) 2022 The Chinese Medical Association, produced by Wolters Kluwer, Inc. under the CC-BY-NC-ND license. FAU - Fan, Menglin AU - Fan M AD - Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China. FAU - Wang, Yu AU - Wang Y AD - Department of Hematology, Peking University People's Hospital, Peking University Institute of Hematology, Beijing 100044, China. FAU - Lin, Ren AU - Lin R AD - Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China. FAU - Lin, Tong AU - Lin T AD - Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China. FAU - Huang, Fen AU - Huang F AD - Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China. FAU - Fan, Zhiping AU - Fan Z AD - Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China. FAU - Xu, Yajing AU - Xu Y AD - Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan 110051, China. FAU - Yang, Ting AU - Yang T AD - Department of Hematology, Fujian Institute of Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China. FAU - Xu, Na AU - Xu N AD - Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China. FAU - Shi, Pengcheng AU - Shi P AD - Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China. FAU - Nie, Danian AU - Nie D AD - Department of Hematology, Sun Yat-Sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510130, China. FAU - Lin, Dongjun AU - Lin D AD - Department of Hematology, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510630, China. FAU - Jiang, Zujun AU - Jiang Z AD - Department of Hematology, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong 510010, China. FAU - Wang, Shunqing AU - Wang S AD - Department of Hematology, Guangzhou First People's Hospital, Guangzhou, Guangdong 510080, China. FAU - Sun, Jing AU - Sun J AD - Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China. FAU - Huang, Xiaojun AU - Huang X AD - Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China. AD - Department of Hematology, Peking University People's Hospital, Peking University Institute of Hematology, Beijing 100044, China. FAU - Liu, Qifa AU - Liu Q AD - Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China. FAU - Xuan, Li AU - Xuan L AD - Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China. LA - eng SI - ClinicalTrials.gov/NCT02673008 SI - ClinicalTrials.gov/NCT01883180 PT - Journal Article DEP - 20220420 PL - China TA - Chin Med J (Engl) JT - Chinese medical journal JID - 7513795 RN - 0 (HLA Antigens) SB - IM MH - Acute Disease MH - *Graft vs Host Disease/epidemiology/prevention & control MH - HLA Antigens MH - Humans MH - Multicenter Studies as Topic MH - Neoplasm, Residual MH - *Precursor Cell Lymphoblastic Leukemia-Lymphoma/therapy MH - Prospective Studies MH - Recurrence MH - Retrospective Studies MH - Siblings MH - *Transplantation, Haploidentical/adverse effects/methods PMC - PMC9276235 COIS- None. EDAT- 2022/04/26 06:00 MHDA- 2022/06/24 06:00 PMCR- 2022/04/20 CRDT- 2022/04/25 15:32 PHST- 2022/04/26 06:00 [pubmed] PHST- 2022/06/24 06:00 [medline] PHST- 2022/04/25 15:32 [entrez] PHST- 2022/04/20 00:00 [pmc-release] AID - 00029330-202204200-00007 [pii] AID - CMJ-2021-1883 [pii] AID - 10.1097/CM9.0000000000001852 [doi] PST - epublish SO - Chin Med J (Engl). 2022 Apr 20;135(8):930-939. doi: 10.1097/CM9.0000000000001852.