Cited by 617CRISPR and Genetic EngineeringVirus-based gene therapy researchRNA Interference and Gene Delivery

A Multifunctional AAV-CRISPR-Cas9 and Its Host Response

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Chew, Wei Leong, Tabebordbar, Mohammadsharif, Cheng, Jason K W, Mali, Prashant, Wu, Elizabeth Y, Ng, Alex H M, Zhu, Kexian, Wagers, Amy J +1 more·2016·Nature Methods

Abstract

CRISPR-Cas9 delivery by adeno-associated virus (AAV) holds promise for gene therapy but faces critical barriers on account of its potential immunogenicity and limited payload capacity. Here, we demonstrate genome engineering in postnatal mice using AAV-split-Cas9, a multifunctional platform customizable for genome editing, transcriptional regulation, and other previously impracticable applications of AAV-CRISPR-Cas9. We identify crucial parameters that impact efficacy and clinical translation of our platform, including viral biodistribution, editing efficiencies in various organs, antigenicity, immunological reactions, and physiological outcomes. These results reveal that AAV-CRISPR-Cas9 evokes host responses with distinct cellular and molecular signatures, but unlike alternative delivery methods, does not induce extensive cellular damage in vivo. Our study provides a foundation for developing effective genome therapeutics.

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  • An alternate method for expressing large proteins relying on intein protein sequences has been reported.

    “An alternate method for expressing large proteins relying on intein protein sequences has also been reported (Li et al., 2008; Truong et al., 2015; Chew et al., 2016).”

    From Evaluating Efficiencies of Dual AAV Approaches for Retinal Targeting (2017) · cites this paper as Chew et al., 2016

  • AAV is being developed as a delivery platform for in vivo gene editing in humans, raising the possibility of T cell responses against the editors, which are typically nucleases of bacterial origin.

    “AAV is also being developed as a delivery platform for in vivo gene editing in humans, raising the possibility of T cell responses against the editors, which are typically nucleases of bacterial origin.20,21”
  • In Ai928 and WT mice, split-spCas9 packaged into two AAVs delivered by systemic and intramuscular injection induced production of specific antibodies to both AAV9 and Cas9, while only Cas9 induced a cellular immune response.

    “Another study aimed at evaluating transduction efficiency and host response, delivered split-spCas9 packaged into two AAVs by systemic and intramuscular injection in Ai928 and WT (C57BL/6) mice.Serums were collected to measure anti-SpCas9 antibody levels, and muscle tissue was harvested to test the immune cells' profile by FACS.Interestingly, both AAV9 and Cas9 induced the production of specific”
  • Providing FK506 daily at 5 mg/kg reduced the number of activated CD4+ and CD8+ T-cells specific to Cas9 in mice.

    “In a study aimed at evaluating the AAV-Cas9 immune responses in mice, providing FK506 daily at 5 mg/kg reduced the number of activated CD4 + and CD8 + T-cells that were specific to Cas9 [40].”

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Authors
Chew, W. L., Tabebordbar, M., Cheng, J. K. W., Mali, P., Wu, E. Y., Ng, A. H. M., Zhu, K., Wagers, A. J., & Church, G. M.
Affiliations
Harvard University (US)
Corresponding author
  • Wagers, Amy J
  • Church, George M
Venue
Nature Methods
Published
2016-09-05
Volume
13
Issue
10
Pages
868-874
ISSN
  • 1548-7091 (ISSN-L)
  • 1548-7105
OpenAlex
W2508903105
Cited by
617
References
63
Citations by year
2026: 28 · 2025: 58 · 2024: 45 · 2023: 65 · 2022: 78 · 2021: 84 · 2020: 66 · 2019: 73 · 2018: 56 · 2017: 57 · 2016: 6
FWCI
33.27
Type
journal article
Language
en
Open access
Locations
  • Nature Methods (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (acceptedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Heart, Lung, and Blood Institute (U01HL100402)
  • National Human Genome Research Institute (P50HG005550)
  • National Eye Institute (PN2EY018244)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › CRISPR and Genetic Engineering
  • 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
Keywords
adeno-associated virus vectors, CRISPR/Cas9 genome editing, host immune response, antigenicity, postnatal mice, transcriptional regulation, cell damage
MeSH terms
Gene Editing, Dependovirus, Animals, Enzyme-Linked Immunosorbent Assay, Genetic Engineering, Genetic Vectors, Humans, Mice, Inbred C57BL, Gene Transfer Techniques, Reverse Transcriptase Polymerase Chain Reaction, Mice, HEK293 Cells, CRISPR-Cas Systems

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