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A multicentre, multinational, prospective, observational registry study of defibrotide in patients diagnosed with veno-occlusive disease/sinusoidal obstruction syndrome after haematopoietic cell transplantation: an EBMT study

Abstract

Severe hepatic veno-occlusive disease/sinusoidal obstruction syndrome (VOD/SOS) is a potentially life-threatening complication of haematopoietic cell transplantation (HCT). This multinational, prospective, observational study (NCT03032016), performed by the EBMT, enrolled patients treated with defibrotide from April 2015 to July 2018. This analysis focused on defibrotide-treated patients with VOD/SOS post-HCT. The primary endpoint was incidence of serious adverse events (SAEs) of interest up to 12 months post-HCT in patients with severe VOD/SOS. Overall, 104 defibrotide-treated patients with VOD/SOS post-HCT were enrolled: 62 had severe VOD/SOS and comprised the primary study population, including 36 with multi-organ dysfunction/failure (MOD/MOF). SAEs of interest occurred in 20 of 62 (32%) severe VOD/SOS patients; the most common by category were infection (24%) and bleeding (13%). In patients with severe VOD/SOS, the Kaplan–Meier–estimated Day 100 survival rate was 73% (95% CI: 60%, 82%) with VOD/SOS resolution by Day 100 in 45 of 62 (73%) patients. MOD/MOF resolved in 19 of 36 (53%) patients with MOD/MOF at VOD/SOS diagnosis. Results from this multicentre registry study build on prior defibrotide studies supporting the utility of defibrotide for the treatment of VOD/SOS post-HCT. These results provide additional real-world evidence of the effectiveness and safety of defibrotide in patients with VOD/SOS post-HCT.

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Fig. 1: Flow diagram of patients enrolled in the EBMT PASS.
Fig. 2: Kaplan–Meier–estimated survival by severity of VOD/SOS.
Fig. 3: Kaplan–Meier–estimated survival by severity of VOD/SOS and age.

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Acknowledgements

This study was supported by Jazz Pharmaceuticals. Medical writing and editorial assistance were provided by Erica Chevalier-Larsen, PhD, CMPP, of SciFluent Communications, Inc., and were financially supported by Jazz Pharmaceuticals.

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MM, ML, and RJR designed the research study. MLB, DB, EC, SC, NM, KP, CR, RW, MZ, and SL performed the research. MM, NM, ML, RJ, VA, and RJR analysed the data. FC contributed essential reagents or tools. All authors wrote and critically revised the paper.

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Correspondence to Mohamad Mohty.

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Conflict of interest

MM has received honoraria and research funding from Jazz Pharmaceuticals. DB and ML have received honoraria from Jazz Pharmaceuticals. RH, VA, and RJR are employees of and hold stock ownership and/or stock options in Jazz Pharmaceuticals. SL has received a consultancy honorarium from Jazz Pharmaceuticals. MLB, EC, SC, NM, KP, CR, RW, MZ and FC have no competing interests to disclose.

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Mohty, M., Battista, M.L., Blaise, D. et al. A multicentre, multinational, prospective, observational registry study of defibrotide in patients diagnosed with veno-occlusive disease/sinusoidal obstruction syndrome after haematopoietic cell transplantation: an EBMT study. Bone Marrow Transplant 56, 2454–2463 (2021). https://doi.org/10.1038/s41409-021-01265-2

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