Cited by 13Virus-based gene therapy researchRNA Interference and Gene DeliveryHIV Research and Treatment

Safe and Effective Gene Therapy for Murine Wiskott-Aldrich Syndrome Using an Insulated Lentiviral Vector

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Singh, Swati, Khan, Iram, Khim, Socheath, Seymour, Brenda, Sommer, Karen, Wielgosz, Matthew, Norgaard, Zachary, Kiem, Hans-Peter +4 more·2017·Molecular Therapy - Methods & Clinical Development

Abstract

Wiskott-Aldrich syndrome (WAS) is a life-threatening immunodeficiency caused by mutations within the WAS gene. Viral gene therapy to restore WAS protein (WASp) expression in hematopoietic cells of patients with WAS has the potential to improve outcomes relative to the current standard of care, allogeneic bone marrow transplantation. However, the development of viral vectors that are both safe and effective has been problematic. While use of viral transcriptional promoters may increase the risk of insertional mutagenesis, cellular promoters may not achieve WASp expression levels necessary for optimal therapeutic effect. Here we evaluate a self-inactivating (SIN) lentiviral vector combining a chromatin insulator upstream of a viral MND (MPSV LTR, NCR deleted, dl587 PBS) promoter driving WASp expression. Used as a gene therapeutic in Was −/− mice, this vector resulted in stable WASp + cells in all hematopoietic lineages and rescue of T and B cell defects with a low number of viral integrations per cell, without evidence of insertional mutagenesis in serial bone marrow transplants. In a gene transfer experiment in non-human primates, the insulated MND promoter (driving GFP expression) demonstrated long-term polyclonal engraftment of GFP + cells. These observations demonstrate that the insulated MND promoter safely and efficiently reconstitutes clinically effective WASp expression and should be considered for future WAS therapy.

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Crossref · 10.1016/j.omtm.2016.11.001

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  • Gene transfer using LVVs into CD34+ HSCs has been used to treat several genetic diseases, including b-thalassemia, X-linked adrenoleukodystrophy, metachromatic leukodystrophy, and Wiskott-Aldrich Syndrome.

    “Gene transfer using LVVs into CD34 þ HSCs has been used to treat several genetic diseases, including b-thalassemia, 100 X-linked adrenoleukodystrophy, 101 metachromatic leukodystrophy, 102 and Wiskott-Aldrich Syndrome.103”

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Authors
Singh, S., Khan, I., Khim, S., Seymour, B., Sommer, K., Wielgosz, M., Norgaard, Z., Kiem, H.-P., Adair, J., Liggitt, D., Nienhuis, A., & Rawlings, D. J.
Affiliations
  • Seattle Children's Research Institute (US)
  • St. Jude Children's Research Hospital (US)
  • Fred Hutch Cancer Center (US)
  • University of Washington (US)
Corresponding author
Rawlings, David J.
Venue
Molecular Therapy - Methods & Clinical Development
Publisher
Elsevier BV
Published
2017-03
Volume
4
Pages
1-16
ISSN
2329-0501 (ISSN-L)
OpenAlex
W2565961003
Cited by
13
References
63
Citations by year
2025: 2 · 2023: 1 · 2022: 2 · 2021: 1 · 2020: 4 · 2019: 1 · 2018: 1 · 2017: 1
FWCI
0.81
Type
journal article
Language
en
Open access
Locations
  • Molecular Therapy — Methods & Clinical Development (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • NIH (R01-AI071163, P01-HL053749, P01-AI097100)
  • Fred Hutchinson Cancer Research Center
  • Seattle Children’s Hospital Program for Cell and Gene Therapy
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Virus-based gene therapy research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
  • Life Sciences › Immunology and Microbiology › Virology › HIV Research and Treatment
Keywords
Wiskott-Aldrich syndrome, gene therapy, lentiviral vectors, chromatin insulators, self-inactivating lentivirus, insertional mutagenesis, viral integration, hematopoietic recovery, mouse model

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