Cited by 254Virus-based gene therapy researchRNA Interference and Gene DeliveryImmunotherapy and Immune Responses

The DOI matches its Crossref record; 27 of the 27 references it cites were found in a registry or an index.

CpG-depleted adeno-associated virus vectors evade immune detection

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Abstract

Due to their efficient transduction potential, adeno-associated virus (AAV) vectors are leading candidates for gene therapy in skeletal muscle diseases. However, immune responses toward the vector or transgene product have been observed in preclinical and clinical studies. TLR9 has been implicated in promoting AAV-directed immune responses, but vectors have not been developed to circumvent this barrier. To assess the requirement of TLR9 in promoting immunity toward AAV-associated antigens following skeletal muscle gene transfer in mice, we compared immunological responses in WT and Tlr9-deficient mice that received an AAV vector with an immunogenic capsid, AAVrh32.33. In Tlr9-deficient mice, IFN-γ T cell responses toward capsid and transgene antigen were suppressed, resulting in minimal cellular infiltrate and stable transgene expression in target muscles. These findings suggest that AAV-directed immune responses may be circumvented by depleting the ligand for TLR9 (CpG sequences) from the vector genome. Indeed, we found that CpG-depleted AAVrh32.33 vectors could establish persistent transgene expression, evade immunity, and minimize infiltration of effector cells. Thus, CpG-depleted AAV vectors could improve outcome of clinical trials of gene therapy for skeletal muscle disease.

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  1. Ulmer, 2000, Dev Biol (Basel)., 104, 9

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Metadata

Authors
Faust, S. M., Bell, P., Cutler, B. J., Ashley, S. N., Zhu, Y., Rabinowitz, J. E., & Wilson, J. M.
Affiliations
  • University of Pennsylvania (US)
  • Temple University (US)
Corresponding author
Wilson, James M.
Venue
Journal of Clinical Investigation
Published
2013-06-17
Volume
123
Issue
7
Pages
2994-3001
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2095942414
Cited by
254
References
27
Citations by year
2026: 20 · 2025: 26 · 2024: 25 · 2023: 30 · 2022: 21 · 2021: 29 · 2020: 21 · 2019: 18 · 2018: 5 · 2017: 19 · 2016: 9 · 2015: 17 · 2014: 10 · 2013: 4
FWCI
8.84
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Heart, Lung, and Blood Institute (R01HL091096, T32HL007954)
  • National Institute of Allergy and Infectious Diseases (T32AI007324)
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 › Immunology › Immunotherapy and Immune Responses
Keywords
adeno-associated virus vectors, CpG depletion, TLR9, immune evasion, TLR9-deficient mice, IFN-γ T cell response, transgene expression
MeSH terms
Dependovirus, Animals, Capsid, DNA, Viral, Genetic Vectors, HeLa Cells, Humans, Mice, Inbred C57BL, Transduction, Genetic, Genetic Therapy, CD4-Positive T-Lymphocytes, Mice, Knockout, CD8-Positive T-Lymphocytes, Muscle, Skeletal, CpG Islands, Chemokines, Transgenes, Toll-Like Receptor 9, Mice, Adaptive Immunity, Immune Evasion

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