Blood Advances (Dec 2024)

Outcomes of haploidentical transplants with PT-CY vs 10/10 MUD transplants with ATG in Germany

  • Aysenur Arslan,
  • Svenja Labuhn,
  • Elisa Sala,
  • Mark Ringhoffer,
  • Johannes Schetelig,
  • Thomas Schröder,
  • Gesine Bug,
  • Georg-Nikolaus Franke,
  • Matthias Stelljes,
  • Peter Dreger,
  • Robert Zeiser,
  • Daniel Teschner,
  • Wolfgang Bethge,
  • Matthias Eder,
  • Matthias Edinger,
  • Elisa Maria Amann,
  • Christine Neuchel,
  • Amelie Schmid-Möglich,
  • Sandra Schmeller,
  • Jan Beyersmann,
  • Hubert Schrezenmeier,
  • Joannis Mytilineos,
  • Nicolaus Kröger,
  • Daniel Fürst,
  • Nicolaus Kröger,
  • Thomas Schroeder,
  • Matthias Stelljes,
  • Peter Dreger,
  • Robert Zeiser,
  • Wolfgang Bethge,
  • Daniel Teschner,
  • Matthias Edinger,
  • Uwe Platzbecker,
  • Ahmet Elmaagacli,
  • Inken Hilgendorf,
  • Andreas Burchert,
  • Friedrich Stölzel,
  • Mareike Verbeek,
  • Elisa Sala,
  • Johanna Tischer,
  • Johannes Schetelig,
  • Arne Brecht,
  • Martin Kaufmann,
  • Christoph Kimmich,
  • Jörg Thomas Bittenbring,
  • Gerald Wulf,
  • Igor Wolfgang Blau,
  • Julia Winkler,
  • Gesine Bug,
  • Edgar Jost,
  • Tobias Holderried,
  • Mareike Dürholt,
  • Christof Scheid,
  • Eva Wagner-Drouet,
  • Denise Wolleschak,
  • Mark Ringhoffer,
  • Michael Kiehl,
  • Friederike Wortmann,
  • Guido Kobbe,
  • Roland Schroers,
  • Angela Krackhardt,
  • Stefan Klein,
  • Lutz P. Müller,
  • Christoph Schmid,
  • Stephan Kaun,
  • Ute Wieschermann,
  • Tobias Bartscht,
  • Ralf Georg Meyer,
  • Matthias Wölfl,
  • Peter Bader,
  • Judith Niederland,
  • Jakob Maucher,
  • Christine Mauz-Körholz,
  • Birgit Burkhardt,
  • Karim Kentouche,
  • Jakob Passweg,
  • Karoline Ehlert

Journal volume & issue
Vol. 8, no. 23
pp. 6104 – 6113

Abstract

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Abstract: Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is the best curative treatment modality for many malignant hematologic disorders. In the absence of a matched related donor, matched unrelated donors (MUDs) and haploidentical donors are the most important stem cell sources. In this registry-based retrospective study, we compared the outcomes of allo-HSCTs from 10/10 MUDs with antithymocyte globulin (ATG)–based regimens (n = 7050) vs haploidentical transplants (Haplo-Tx) using posttransplant cyclophosphamide (PT-CY Haplo; n = 487) in adult patients with hematologic malignancies between 2010 and 2020. Cox proportional hazard-and competing risks regression models were formed to compare the outcomes. Overall survival (OS), Disease-free survival (DFS), and graft-versus-host disease (GVHD)–free and relapse-free survival (GRFS) were superior for 10/10 MUDs (OS [hazard ratio (HR), 1.27; 95% confidence interval (CI), 1.10-1.47; P = .001]; DFS [HR, 1.17; CI, 1.02-1.34; P = .022]; GRFS [HR, 1.34; CI, 1.19-1.50; P < .001]). The risk of acute GVHD (aGVHD) grade 2 to 4, aGVHD grade 3 to 4, and chronic GVHD (cGVHD) was higher in the PT-CY Haplo group than the 10/10 MUD group (aGVHD grade 2-4 [HR, 1.46; CI, 1.25-1.71; P < .001]; aGVHD grade 3-4 [HR, 1.74; CI, 1.37- 2.20; P < .001]; cGVHD [HR, 1.30; CI, 1.11-1.51; P = .001]). A lower incidence of relapse was observed in the PT-CY Haplo group (relapse: HR, 0.83; CI, 0.69-0.99; P = .038). Unrelated 10/10 matched transplantation with ATG leads to lower GVHD rates and improved survival rates compared with PT-CY Haplo transplantation in Germany.