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Title: CRISPR-Cas9-Mediated Genome Editing Increases Lifespan and Improves Motor Deficits in a Huntington’s Disease Mouse Model

Abstract

Huntington's disease (HD) is a currently incurable and, ultimately, fatal neurodegenerative disorder caused by a CAG trinucleotide repeat expansion within exon 1 of the huntingtin (HTT) gene, which results in the production of a mutant protein that forms inclusions and selectively destroys neurons in the striatum and other adjacent structures. The RNA-guided Cas9 endonuclease from CRISPR-Cas9 systems is a versatile technology for inducing DNA double-strand breaks that can stimulate the introduction of frameshift-inducing mutations and permanently disable mutant gene function. Here, we show that the Cas9 nuclease from Staphylococcus aureus, a small Cas9 ortholog that can be packaged alongside a single guide RNA into a single adeno-associated virus (AAV) vector, can be used to disrupt the expression of the mutant HTT gene in the R6/2 mouse model of HD following its in vivo delivery to the striatum. Specifically, we found that CRISPR-Cas9-mediated disruption of the mutant HTT gene resulted in a ~50% decrease in neuronal inclusions and significantly improved lifespan and certain motor deficits. These results thus illustrate the potential for CRISPR-Cas9 technology to treat HD and other autosomal dominant neurodegenerative disorders caused by a trinucleotide repeat expansion via in vivo genome editing.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2]
  1. Univ. of California, Berkeley, CA (United States)
  2. Univ. of Illinois, Urbana, IL (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Institutes of Health (NIH); National Science Foundation (NSF)
OSTI Identifier:
1599809
Grant/Contract Number:  
AC02-05CH11231; R01EY022975
Resource Type:
Accepted Manuscript
Journal Name:
Molecular Therapy - Nucleic Acids
Additional Journal Information:
Journal Volume: 17; Journal Issue: C; Journal ID: ISSN 2162-2531
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; CRISPR-Cas9; Huntington's disease; AAV; gene therapy; genome editing

Citation Formats

Ekman, Freja K., Ojala, David S., Adil, Maroof M., Lopez, Paola A., Schaffer, David V., and Gaj, Thomas. CRISPR-Cas9-Mediated Genome Editing Increases Lifespan and Improves Motor Deficits in a Huntington’s Disease Mouse Model. United States: N. p., 2019. Web. doi:10.1016/j.omtn.2019.07.009.
Ekman, Freja K., Ojala, David S., Adil, Maroof M., Lopez, Paola A., Schaffer, David V., & Gaj, Thomas. CRISPR-Cas9-Mediated Genome Editing Increases Lifespan and Improves Motor Deficits in a Huntington’s Disease Mouse Model. United States. https://doi.org/10.1016/j.omtn.2019.07.009
Ekman, Freja K., Ojala, David S., Adil, Maroof M., Lopez, Paola A., Schaffer, David V., and Gaj, Thomas. Fri . "CRISPR-Cas9-Mediated Genome Editing Increases Lifespan and Improves Motor Deficits in a Huntington’s Disease Mouse Model". United States. https://doi.org/10.1016/j.omtn.2019.07.009. https://www.osti.gov/servlets/purl/1599809.
@article{osti_1599809,
title = {CRISPR-Cas9-Mediated Genome Editing Increases Lifespan and Improves Motor Deficits in a Huntington’s Disease Mouse Model},
author = {Ekman, Freja K. and Ojala, David S. and Adil, Maroof M. and Lopez, Paola A. and Schaffer, David V. and Gaj, Thomas},
abstractNote = {Huntington's disease (HD) is a currently incurable and, ultimately, fatal neurodegenerative disorder caused by a CAG trinucleotide repeat expansion within exon 1 of the huntingtin (HTT) gene, which results in the production of a mutant protein that forms inclusions and selectively destroys neurons in the striatum and other adjacent structures. The RNA-guided Cas9 endonuclease from CRISPR-Cas9 systems is a versatile technology for inducing DNA double-strand breaks that can stimulate the introduction of frameshift-inducing mutations and permanently disable mutant gene function. Here, we show that the Cas9 nuclease from Staphylococcus aureus, a small Cas9 ortholog that can be packaged alongside a single guide RNA into a single adeno-associated virus (AAV) vector, can be used to disrupt the expression of the mutant HTT gene in the R6/2 mouse model of HD following its in vivo delivery to the striatum. Specifically, we found that CRISPR-Cas9-mediated disruption of the mutant HTT gene resulted in a ~50% decrease in neuronal inclusions and significantly improved lifespan and certain motor deficits. These results thus illustrate the potential for CRISPR-Cas9 technology to treat HD and other autosomal dominant neurodegenerative disorders caused by a trinucleotide repeat expansion via in vivo genome editing.},
doi = {10.1016/j.omtn.2019.07.009},
journal = {Molecular Therapy - Nucleic Acids},
number = C,
volume = 17,
place = {United States},
year = {Fri Sep 06 00:00:00 EDT 2019},
month = {Fri Sep 06 00:00:00 EDT 2019}
}

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Ablation of huntingtin in adult neurons is nondeleterious but its depletion in young mice causes acute pancreatitis
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journal, January 1985

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Genome-Editing Technologies: Principles and Applications
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Differential vulnerability of neurons in Huntington’s disease: the role of cell type-specific features
journal, March 2010


In vivo genome editing improves motor function and extends survival in a mouse model of ALS
journal, December 2017

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A Programmable Dual-RNA-Guided DNA Endonuclease in Adaptive Bacterial Immunity
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Multiplex Genome Engineering Using CRISPR/Cas Systems
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Aggregation of Huntingtin in Neuronal Intranuclear Inclusions and Dystrophic Neurites in Brain
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Inactivation of the mouse Huntington's disease gene homolog Hdh
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Rationally engineered Cas9 nucleases with improved specificity
journal, December 2015


A critical window of CAG repeat-length correlates with phenotype severity in the R6/2 mouse model of Huntington's disease
journal, January 2012

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Why We Still Need More Research on the Epidemiology of Huntington's Disease
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Allele-Specific Silencing of Mutant Huntingtin in Rodent Brain and Human Stem Cells
journal, June 2014


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text, January 2012

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Works referencing / citing this record:

Learning to collaborate: bringing together behavior and quantitative genomics
journal, January 2020

  • Williams-Simon, Patricka A.; Ganesan, Mathangi; King, Elizabeth G.
  • Journal of Neurogenetics, Vol. 34, Issue 1
  • DOI: 10.1080/01677063.2019.1710145

Therapeutic Advances for Huntington’s Disease
journal, January 2020


Optimizing sgRNA to Improve CRISPR/Cas9 Knockout Efficiency: Special Focus on Human and Animal Cell
journal, November 2021

  • Shojaei Baghini, Sadegh; Gardanova, Zhanna R.; Zekiy, Angelina Olegovna
  • Frontiers in Bioengineering and Biotechnology, Vol. 9
  • DOI: 10.3389/fbioe.2021.775309