Risk Factors for Graft-versus-Host Disease in Haploidentical Hematopoietic Cell Transplantation Using Post-Transplant Cyclophosphamide

Annie Im, Armin Rashidi, Tao Wang, Michael Hemmer, Margaret L. MacMillan, Joseph Pidala, Madan Jagasia, Steven Pavletic, Navneet S. Majhail, Daniel Weisdorf, Hisham Abdel-Azim, Vaibhav Agrawal, A. Samer Al-Homsi, Mahmoud Aljurf, Medhat Askar, Jeffery J. Auletta, Asad Bashey, Amer Beitinjaneh, Vijaya Raj Bhatt, Michael ByrneJean Yves Cahn, Mitchell Cairo, Paul Castillo, Jan Cerny, Saurabh Chhabra, Hannah Choe, Stefan Ciurea, Andrew Daly, Miguel Angel Diaz Perez, Nosha Farhadfar, Shahinaz M. Gadalla, Robert Gale, Siddhartha Ganguly, Usama Gergis, Rabi Hanna, Peiman Hematti, Roger Herzig, Gerhard C. Hildebrandt, Deepesh P. Lad, Catherine Lee, Leslie Lehmann, Lazaros Lekakis, Rammurti T. Kamble, Mohamed A. Kharfan-Dabaja, Pooja Khandelwal, Rodrigo Martino, Hemant S. Murthy, Taiga Nishihori, Tracey A. O'Brien, Richard F. Olsson, Sagar S. Patel, Miguel Angel Perales, Tim Prestidge, Muna Qayed, Rizwan Romee, Hélène Schoemans, Sachiko Seo, Akshay Sharma, Melhem Solh, Roger Strair, Takanori Teshima, Alvaro Urbano-Ispizua, Marjolein Van der Poel, Ravi Vij, John L. Wagner, Basem William, Baldeep Wirk, Jean A. Yared, Steve R. Spellman, Mukta Arora, Betty K. Hamilton

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


Post-transplant cyclophosphamide (PTCy) has significantly increased the successful use of haploidentical donors with a relatively low incidence of graft-versus-host disease (GVHD). Given its increasing use, we sought to determine risk factors for GVHD after haploidentical hematopoietic cell transplantation (haplo-HCT) using PTCy. Data from the Center for International Blood and Marrow Transplant Research on adult patients with acute myeloid leukemia, acute lymphoblastic leukemia, myelodysplastic syndrome, or chronic myeloid leukemia who underwent PTCy-based haplo-HCT (2013 to 2016) were analyzed and categorized into 4 groups based on myeloablative (MA) or reduced-intensity conditioning (RIC) and bone marrow (BM) or peripheral blood (PB) graft source. In total, 646 patients were identified (MA-BM = 79, MA-PB = 183, RIC-BM = 192, RIC-PB = 192). The incidence of grade 2 to 4 acute GVHD at 6 months was highest in MA-PB (44%), followed by RIC-PB (36%), MA-BM (36%), and RIC-BM (30%) (P =.002). The incidence of chronic GVHD at 1 year was 40%, 34%, 24%, and 20%, respectively (P <.001). In multivariable analysis, there was no impact of stem cell source or conditioning regimen on grade 2 to 4 acute GVHD; however, older donor age (30 to 49 versus <29 years) was significantly associated with higher rates of grade 2 to 4 acute GVHD (hazard ratio [HR], 1.53; 95% confidence interval [CI], 1.11 to 2.12; P =.01). In contrast, PB compared to BM as a stem cell source was a significant risk factor for the development of chronic GVHD (HR, 1.70; 95% CI, 1.11 to 2.62; P =.01) in the RIC setting. There were no differences in relapse or overall survival between groups. Donor age and graft source are risk factors for acute and chronic GVHD, respectively, after PTCy-based haplo-HCT. Our results indicate that in RIC haplo-HCT, the risk of chronic GVHD is higher with PB stem cells, without any difference in relapse or overall survival.

Original languageEnglish (US)
Pages (from-to)1459-1468
Number of pages10
JournalBiology of Blood and Marrow Transplantation
Issue number8
StatePublished - Aug 2020

All Science Journal Classification (ASJC) codes

  • Hematology
  • Transplantation


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