Cited by 606Virus-based gene therapy researchLysosomal Storage Disorders ResearchMetabolism and Genetic Disorders

Hematopoietic stem-cell gene therapy for cerebral adrenoleukodystrophy

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Eichler, Florian, Duncan, Christine, Musolino, Patricia L., Orchard, Paul J., De Oliveira, Satiro, Thrasher, Adrian J., Armant, Myriam, Dansereau, Colleen +17 more·2017·New England Journal of Medicine

Abstract

BACKGROUND: In X-linked adrenoleukodystrophy, mutations in ABCD1 lead to loss of function of the ALD protein. Cerebral adrenoleukodystrophy is characterized by demyelination and neurodegeneration. Disease progression, which leads to loss of neurologic function and death, can be halted only with allogeneic hematopoietic stem-cell transplantation. METHODS: We enrolled boys with cerebral adrenoleukodystrophy in a single-group, open-label, phase 2-3 safety and efficacy study. Patients were required to have early-stage disease and gadolinium enhancement on magnetic resonance imaging (MRI) at screening. The investigational therapy involved infusion of autologous CD34+ cells transduced with the elivaldogene tavalentivec (Lenti-D) lentiviral vector. In this interim analysis, patients were assessed for the occurrence of graft-versus-host disease, death, and major functional disabilities, as well as changes in neurologic function and in the extent of lesions on MRI. The primary end point was being alive and having no major functional disability at 24 months after infusion. RESULTS: A total of 17 boys received Lenti-D gene therapy. At the time of the interim analysis, the median follow-up was 29.4 months (range, 21.6 to 42.0). All the patients had gene-marked cells after engraftment, with no evidence of preferential integration near known oncogenes or clonal outgrowth. Measurable ALD protein was observed in all the patients. No treatment-related death or graft-versus-host disease had been reported; 15 of the 17 patients (88%) were alive and free of major functional disability, with minimal clinical symptoms. One patient, who had had rapid neurologic deterioration, had died from disease progression. Another patient, who had had evidence of disease progression on MRI, had withdrawn from the study to undergo allogeneic stem-cell transplantation and later died from transplantation-related complications. CONCLUSIONS: Early results of this study suggest that Lenti-D gene therapy may be a safe and effective alternative to allogeneic stem-cell transplantation in boys with early-stage cerebral adrenoleukodystrophy. Additional follow-up is needed to fully assess the duration of response and long-term safety. (Funded by Bluebird Bio and others; STARBEAM ClinicalTrials.gov number, NCT01896102 ; ClinicalTrialsRegister.eu number, 2011-001953-10 .).

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Crossref · 10.1056/nejmoa1700554

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  • Both hematopoietic stem cell transplantation and gene therapy require the patient to undergo chemotherapy.

    “The former is associated with its own degree of morbidity and mortality [62], and both require the patient undergo chemotherapy [48].”

    From Structure and Function of the ABCD1 Variant Database: 20 Years, 940 Pathogenic Variants, and 3400 Cases of Adrenoleukodystrophy (2022) · cites this paper as [48]

    The Methods (Study Design and Investigational Therapy; page unavailable) state that patients receiving Lenti-D gene therapy were conditioned with busulfan and cyclophosphamide before infusion. The Discussion says allogeneic transplantation requires immunosuppression, but the passages found do not state that transplantation requires chemotherapy. The paper therefore supports the gene-therapy part of the claim, not the assertion that both require chemotherapy. (LLM, conf=0.84)

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  • Early-stage treatment of childhood cerebral ALD with hematopoietic stem cell transplantation and, more recently, gene therapy can arrest disease progression if performed in the window of opportunity when the MRI is abnormal but neurological symptoms are not yet apparent.

    “Early-stage treatment of childhood cerebral ALD with hematopoietic stem cell transplantation and, more recently, gene therapy can arrest disease progression if performed in the window of opportunity when the MRI is abnormal but neurological symptoms are not yet apparent [7,38,43,44,45,46,47,48,49,50].”

    From Structure and Function of the ABCD1 Variant Database: 20 Years, 940 Pathogenic Variants, and 3400 Cases of Adrenoleukodystrophy (2022) · cites this paper as [48]

    Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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  • The well-established treatments for CALD are useful only as the first signs of abnormalities are noted on MRI, before the onset of any neurological symptoms.

    “However, they are useful only as the first signs of abnormalities are noted on magnetic resonance imaging (MRI) of the brain, before the onset of any neurological symptoms.”

    From Identification of a Novel Non-Canonical Splice-Site Variant in ABCD1 (2023) · cites this paper as [6]

    The introductory passage following the Abstract > Conclusions says transplantation is more likely to be effective early and reports good outcomes when disease is detected by imaging before symptoms. It does not say treatment is useful only at that point: it describes outcomes in symptomatic boys with a high burden of disease as often unfavorable, not invariably so. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Prompt diagnosis can improve the prognosis of CALD in boys.

    “Thus, prompt diagnosis can improve the prognosis of CALD in boys [2,3,4,5,6].”
  • Autologous hematopoietic stem cell transplantation after ex vivo lentiviral gene therapy has been developed.

    “Furthermore, an autologous hematopoietic stem cell transplantation after ex vivo lentiviral gene therapy has been developed (Eichler et al., 2017).”

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Research works printed but not linked: 2

  1. Loes DJ, 1994, AJNR Am J Neuroradiol, 15, 1761
  2. Amartino H, 2017, J Inborn Errors Metab Screen, 5, 1

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Authors
Eichler, F., Duncan, C., Musolino, P. L., Orchard, P. J., De Oliveira, S., Thrasher, A. J., Armant, M., Dansereau, C., Lund, T. C., Miller, W. P., Raymond, G. V., Sankar, R., Shah, A. J., Sevin, C., Gaspar, H. B., Gissen, P., Amartino, H., Bratkovic, D., Smith, N. J. C., Paker, A. M., Shamir, E., O’Meara, T., Davidson, D., Aubourg, P., & Williams, D. A.
Affiliations
  • Boston Children's Hospital (US)
  • Bluebird Bio (United States) (US)
Venue
New England Journal of Medicine
Published
2017-10-26
Volume
377
Issue
17
Pages
1630-1638
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2764213443
Cited by
604
References
31
Citations by year
2026: 47 · 2025: 43 · 2024: 96 · 2023: 60 · 2022: 67 · 2021: 79 · 2020: 60 · 2019: 75 · 2018: 63 · 2017: 11 · 2015: 1 · 2013: 1
FWCI
37.84
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • Wellcome Trust (104807/Z/14/Z)
  • National Institutes of Health (UL1TR001102)
  • National Institute of Neurological Disorders and Stroke (K08NS094683)
  • National Center for Advancing Translational Sciences
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Virus-based gene therapy research
  • Health Sciences › Medicine › Physiology › Lysosomal Storage Disorders Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Metabolism and Genetic Disorders
Keywords
cerebral adrenoleukodystrophy, X-linked adrenoleukodystrophy, ABCD1, hematopoietic stem cell gene therapy, lentiviral vectors, demyelination, neurodegeneration, graft-versus-host disease, functional disability, early-stage disease
MeSH terms
ATP Binding Cassette Transporter, Subfamily D, Member 1, Adolescent, Adrenoleukodystrophy, Child, Combined Modality Therapy, Genetic Vectors, Hematopoietic Stem Cells, Humans, Male, Transplantation, Autologous, Genetic Therapy, Biomarkers, Lentivirus, Polymerase Chain Reaction, Granulocyte Colony-Stimulating Factor, Hematopoietic Stem Cell Transplantation, ATP-Binding Cassette Transporters, Antigens, CD34

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