Randomized Phase III BMT CTN Trial of Calcineurin Inhibitor-Free Chronic Graft-Versus-Host Disease Interventions in Myeloablative Hematopoietic Cell Transplantation for Hematologic Malignancies.

TitleRandomized Phase III BMT CTN Trial of Calcineurin Inhibitor-Free Chronic Graft-Versus-Host Disease Interventions in Myeloablative Hematopoietic Cell Transplantation for Hematologic Malignancies.
Publication TypeJournal Article
Year of Publication2022
AuthorsLuznik, L, Pasquini, MC, Logan, B, Soiffer, RJ, Wu, J, Devine, SM, Geller, N, Giralt, S, Heslop, HE, Horowitz, MM, Jones, RJ, Litzow, MR, Mendizabal, A, Muffly, L, Nemecek, ER, O'Donnell, L, O'Reilly, RJ, Palencia, R, Schetelig, J, Shune, L, Solomon, SR, Vasu, S, Ho, VT, Perales, M-A
JournalJ Clin Oncol
Volume40
Issue4
Pagination356-368
Date Published2022 02 01
ISSN1527-7755
KeywordsAdolescent, Adult, Aged, Calcineurin Inhibitors, Chronic Disease, Cyclophosphamide, Disease-Free Survival, Drug Therapy, Combination, Female, Germany, Graft vs Host Disease, Hematologic Neoplasms, Hematopoietic Stem Cell Transplantation, Humans, Immunosuppressive Agents, Male, Methotrexate, Middle Aged, Myeloablative Agonists, Recurrence, Tacrolimus, Time Factors, Transplantation Conditioning, United States, Young Adult
Abstract

PURPOSE: Calcineurin inhibitors (CNI) are standard components of graft-versus-host disease (GVHD) prophylaxis after hematopoietic cell transplantation (HCT). Prior data suggested that CNI-free approaches using donor T-cell depletion, either by ex vivo CD34 selection or in vivo post-transplant cyclophosphamide (PTCy) as a single agent, are associated with lower rates of chronic GVHD (cGVHD).

METHODS: This multicenter phase III trial randomly assigned patients with acute leukemia or myelodysplasia and an HLA-matched donor to receive CD34-selected peripheral blood stem cell, PTCy after a bone marrow (BM) graft, or tacrolimus and methotrexate after BM graft (control). The primary end point was cGVHD (moderate or severe) or relapse-free survival (CRFS).

RESULTS: Among 346 patients enrolled, 327 received HCT, 300 per protocol. Intent-to-treat rates of 2-year CRFS were 50.6% for CD34 selection (hazard ratio [HR] compared with control, 0.80; 95% CI, 0.56 to 1.15; = .24), 48.1% for PTCy (HR, 0.86; 0.61 to 1.23; = .41), and 41.0% for control. Corresponding rates of overall survival were 60.1% (HR, 1.74; 1.09 to 2.80; = .02), 76.2% (HR, 1.02; 0.60 to 1.72; = .95), and 76.1%. CD34 selection was associated with lower moderate to severe cGVHD (HR, 0.25; 0.12 to 0.52; = .02) but higher transplant-related mortality (HR, 2.76; 1.26 to 6.06; = .01). PTCy was associated with comparable cGVHD and survival outcomes to control, and a trend toward lower disease relapse (HR, 0.52; 0.28 to 0.96; = .037).

CONCLUSION: CNI-free interventions as performed herein did not result in superior CRFS compared with tacrolimus and methotrexate with BM. Lower rates of moderate and severe cGVHD did not translate into improved survival.

DOI10.1200/JCO.21.02293
Alternate JournalJ Clin Oncol
PubMed ID34855460
PubMed Central IDPMC8797487
Grant ListU10 HL069294 / HL / NHLBI NIH HHS / United States
U24 HL138660 / HL / NHLBI NIH HHS / United States
UG1 HL108945 / HL / NHLBI NIH HHS / United States