Samuel Groeschel1, Jörn-Sven Kühl2, Annette E Bley3, Christiane Kehrer1, Bernhard Weschke4, Michaela Döring5, Judith Böhringer1, Johanna Schrum6, René Santer3, Alfried Kohlschütter3, Ingeborg Krägeloh-Mann1, Ingo Müller7. 1. Department of Pediatric Neurology and Developmental Medicine, University Children's Hospital of Tübingen, Tübingen, Germany. 2. Department of Pediatric Oncology, Charité University Medicine Berlin, Berlin, Germany. 3. Department of Pediatrics, University Children's Hospital Hamburg-Eppendorf, Hamburg, Germany. 4. Department of Neuropediatrics, Charité University Medicine Berlin, Berlin, Germany. 5. Department of Pediatric Hematology and Oncology, University Children's Hospital of Tübingen, Tübingen, Germany. 6. Department of Pediatric Hematology and Oncology, University Children's Hospital Hamburg-Eppendorf, Hamburg, Germany. 7. Department of Pediatric Hematology and Oncology, University Children's Hospital of Tübingen, Tübingen, Germany6Department of Pediatric Hematology and Oncology, University Children's Hospital Hamburg-Eppendorf, Hamburg, Germany.
Abstract
IMPORTANCE: Allogeneic hematopoietic stem cell transplantation (HSCT) has been the only treatment option clinically available during the last 20 years for juvenile metachromatic leukodystrophy (MLD), reported with variable outcome and without comparison with the natural course of the disease. OBJECTIVE: To compare the long-term outcome of patients who underwent allogeneic HSCT with control patients who did not among a cohort with juvenile MLD. DESIGN, SETTING, AND PARTICIPANTS: Patients with juvenile MLD born between 1975 and 2009 and who received HSCT at a median age of 7 years (age range, 1.5-18.2 years) and nontransplanted patients with juvenile MLD born between 1967 and 2007 were included in this case-control study. The median follow-up after HSCT was 7.5 years (range, 3.0-19.7 years). Patients underwent HSCT at 3 German centers between 1991 and 2012. The analysis was done between July 2014 and August 2015. MAIN OUTCOMES AND MEASURES: Survival and transplantation-related mortality, loss of gross motor function (Gross Motor Function Classification in MLD), loss of any language function, and magnetic resonance imaging (MRI) severity score for cerebral changes. To explore prognostic factors at baseline, patients who underwent HSCT (hereafter, transplanted patients) were a priori divided into stable vs progressive disease, according to gross motor and cognitive function. RESULTS: Participants were 24 transplanted patients (11 boys, 13 girls) and 41 control patients (22 boys, 19 girls) who did not receive transplantation (hereafter, nontransplanted patients) with juvenile MLD. Among the transplanted patients, 4 children died of transplantation-related mortality, and 2 additional children died of rapid MLD progression 1.5 and 8.6 years after HSCT, resulting in a 5-year survival of 79% (19 of 24). Among the nontransplanted patients, 5-year survival after disease onset was 100% (41 of 41). However, 11 died of MLD progression, resulting in similar overall survival within the observation period. Nine of the long-term survivors after HSCT had disease progression, while 11 showed stable disease. Compared with the nontransplanted patients, the transplanted patients were less likely to lose their gross motor or language function and demonstrated significantly lower MRI severity scores at the latest examination. Patients after HSCT were more likely to have a stable disease course when undergoing HSCT at an early stage with no or only mild gross motor deficits (Gross Motor Function Classification in MLD level 0 or 1) and an IQ of at least 85, when age at disease onset was older than 4 years, or when MRI severity scores were low (preferably ≤17). CONCLUSIONS AND RELEVANCE: Among patients with juvenile MLD, patients who underwent HSCT had a better gross motor and language outcome and lower MRI severity scores compared with nontransplanted patients. Transplantation at a presymptomatic or early symptomatic stage of juvenile MLD is associated with a reasonable chance for disease stabilization.
IMPORTANCE: Allogeneic hematopoietic stem cell transplantation (HSCT) has been the only treatment option clinically available during the last 20 years for juvenile metachromatic leukodystrophy (MLD), reported with variable outcome and without comparison with the natural course of the disease. OBJECTIVE: To compare the long-term outcome of patients who underwent allogeneic HSCT with control patients who did not among a cohort with juvenile MLD. DESIGN, SETTING, AND PARTICIPANTS: Patients with juvenile MLD born between 1975 and 2009 and who received HSCT at a median age of 7 years (age range, 1.5-18.2 years) and nontransplanted patients with juvenile MLD born between 1967 and 2007 were included in this case-control study. The median follow-up after HSCT was 7.5 years (range, 3.0-19.7 years). Patients underwent HSCT at 3 German centers between 1991 and 2012. The analysis was done between July 2014 and August 2015. MAIN OUTCOMES AND MEASURES: Survival and transplantation-related mortality, loss of gross motor function (Gross Motor Function Classification in MLD), loss of any language function, and magnetic resonance imaging (MRI) severity score for cerebral changes. To explore prognostic factors at baseline, patients who underwent HSCT (hereafter, transplanted patients) were a priori divided into stable vs progressive disease, according to gross motor and cognitive function. RESULTS:Participants were 24 transplanted patients (11 boys, 13 girls) and 41 control patients (22 boys, 19 girls) who did not receive transplantation (hereafter, nontransplanted patients) with juvenile MLD. Among the transplanted patients, 4 children died of transplantation-related mortality, and 2 additional children died of rapid MLD progression 1.5 and 8.6 years after HSCT, resulting in a 5-year survival of 79% (19 of 24). Among the nontransplanted patients, 5-year survival after disease onset was 100% (41 of 41). However, 11 died of MLD progression, resulting in similar overall survival within the observation period. Nine of the long-term survivors after HSCT had disease progression, while 11 showed stable disease. Compared with the nontransplanted patients, the transplanted patients were less likely to lose their gross motor or language function and demonstrated significantly lower MRI severity scores at the latest examination. Patients after HSCT were more likely to have a stable disease course when undergoing HSCT at an early stage with no or only mild gross motor deficits (Gross Motor Function Classification in MLD level 0 or 1) and an IQ of at least 85, when age at disease onset was older than 4 years, or when MRI severity scores were low (preferably ≤17). CONCLUSIONS AND RELEVANCE: Among patients with juvenile MLD, patients who underwent HSCT had a better gross motor and language outcome and lower MRI severity scores compared with nontransplanted patients. Transplantation at a presymptomatic or early symptomatic stage of juvenile MLD is associated with a reasonable chance for disease stabilization.
Authors: Francesco Gavazzi; Laura Adang; Amy Waldman; Amanda K Jan; Geraldine Liu; Scott A Lorch; Sara B DeMauro; Justine Shults; Samuel R Pierce; Elizabeth Ballance; Tracy Kornafel; Ann Harrington; Allan M Glanzman; Adeline Vanderver Journal: Pediatr Neurol Date: 2021-09-24 Impact factor: 4.210
Authors: Brigitte T A van den Broek; Kristin Page; Annalisa Paviglianiti; Janna Hol; Heather Allewelt; Fernanda Volt; Gerard Michel; Miguel Angel Diaz; Victoria Bordon; Tracey O'Brien; Peter J Shaw; Chantal Kenzey; Amal Al-Seraihy; Peter M van Hasselt; Andrew R Gennery; Eliane Gluckman; Vanderson Rocha; Annalisa Ruggeri; Joanne Kurtzberg; Jaap Jan Boelens Journal: Blood Adv Date: 2018-01-04
Authors: Diane F van Rappard; Marsh Königs; Marjan E Steenweg; Jaap Jan Boelens; Jaap Oosterlaan; Marjo S van der Knaap; Nicole I Wolf; Petra J W Pouwels Journal: J Neurol Date: 2018-01-30 Impact factor: 4.849