Cited by 96Genetic Neurodegenerative DiseasesRNA Interference and Gene DeliveryVirus-based gene therapy research

Artificial miRNAs Reduce Human Mutant Huntingtin Throughout the Striatum in a Transgenic Sheep Model of Huntington's Disease

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Pfister, Edith L., DiNardo, Natalie, Mondo, Erica, Borel, Florie, Conroy, Faith, Fraser, Cara, Gernoux, Gwladys, Han, Xin +16 more·2018·Human Gene Therapy

Abstract

Huntington's disease (HD) is a fatal neurodegenerative disease caused by a genetic expansion of the CAG repeat region in the huntingtin (HTT) gene. Studies in HD mouse models have shown that artificial miRNAs can reduce mutant HTT, but evidence for their effectiveness and safety in larger animals is lacking. HD transgenic sheep express the full-length human HTT with 73 CAG repeats. AAV9 was used to deliver unilaterally to HD sheep striatum an artificial miRNA targeting exon 48 of the human HTT mRNA under control of two alternative promoters: U6 or CβA. The treatment reduced human mutant (m) HTT mRNA and protein 50-80% in the striatum at 1 and 6 months post injection. Silencing was detectable in both the caudate and putamen. Levels of endogenous sheep HTT protein were not affected. There was no significant loss of neurons labeled by DARPP32 or NeuN at 6 months after treatment, and Iba1-positive microglia were detected at control levels. It is concluded that safe and effective silencing of human mHTT protein can be achieved and sustained in a large-animal brain by direct delivery of an AAV carrying an artificial miRNA.

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Authors
Pfister, E. L., DiNardo, N., Mondo, E., Borel, F., Conroy, F., Fraser, C., Gernoux, G., Han, X., Hu, D., Johnson, E., Kennington, L., Liu, P., Reid, S. J., Sapp, E., Vodicka, P., Kuchel, T., Morton, A. J., Howland, D., Moser, R., Sena-Esteves, M., Gao, G., Mueller, C., DiFiglia, M., & Aronin, N.
Affiliations
  • University of Massachusetts Chan Medical School (US)
  • South Australian Health and Medical Research Institute (AU)
  • Sichuan University (CN)
  • Dartmouth College (US)
  • University of Auckland (NZ)
  • Massachusetts General Hospital (US)
  • MassGeneral Institute for Neurodegenerative Disease, Charlestown, Massachusetts.
  • University of Cambridge (GB)
  • CHDI Foundation (US)
  • Horae Gene Therapy Center, University of Massachusetts Medical School, Worcester, Massachusetts.
  • Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts.
Venue
Human Gene Therapy
Published
2018-06
Volume
29
Issue
6
Pages
663-673
ISSN
  • 1043-0342 (ISSN-L)
  • 1557-7422
OpenAlex
W2774783374
Cited by
95
References
30
Citations by year
2026: 10 · 2025: 5 · 2024: 5 · 2023: 9 · 2022: 15 · 2021: 16 · 2020: 14 · 2019: 14 · 2018: 6 · 2016: 1
FWCI
4.55
Type
journal article
Language
en
Open access
Locations
  • Human Gene Therapy (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • eScholarship@UMassChan (submittedVersion)
  • Apollo (University of Cambridge) (submittedVersion)
  • Apollo
Funders
National Institute of Neurological Disorders and Stroke (R01NS088689)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Genetic Neurodegenerative Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Virus-based gene therapy research
Keywords
Huntington's disease, artificial microRNA, mutant huntingtin, gene silencing, striatum, CAG repeat expansion, alternative promoters, neuroprotection, microglia, large animal model
MeSH terms
Huntingtin Protein, Dependovirus, Animals, Disease Models, Animal, Electrolytes, Genetic Vectors, Humans, Huntington Disease, Immunoassay, Injections, Kidney, Liver, Neurons, RNA, Messenger, Sheep, Genome, Viral, Neostriatum, Microglia, Animals, Genetically Modified, MicroRNAs, Mutant Proteins

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