Mannitol-facilitated CNS entry of rAAV2 vector significantly delayed the neurological disease progression in MPS IIIB mice
Open accessAbstract
The presence of the blood-brain barrier (BBB) presents the most critical challenge in therapeutic development for mucopolysaccharidosis (MPS) IIIB, a lysosomal storage disease with severe neurological manifestation, because of alpha-N-acetylglucosaminidase (NaGlu) deficiency. Earlier, we showed a global central nervous system (CNS) transduction in mice by mannitol-facilitated entry of intravenous (IV)-delivered recombinant adeno-associated viral serotype 2 (rAAV2) vector. In this study, we optimized the approach and showed that the maximal transduction in the CNS occurred when the rAAV2 vector was IV injected at 8 min after mannitol administration, and was approximately 10-fold more efficient than IV delivery of the vector at 5 or 10 min after mannitol infusion. Using this optimal (8 min) regimen, a single IV infusion of rAAV2-CMV-hNaGlu vector is therapeutically beneficial for treating the CNS disease of MPS IIIB in adult mice, with significantly extended survival, improved behavioral performance, and reduction of brain lysosomal storage pathology. The therapeutic benefit correlated with maximal delivery to the CNS, but not peripheral tissues. This milestone data shows the first effective gene delivery across the BBB to treat CNS disease. The critical timing of vector delivery and mannitol infusion highlights the important contribution of this pretreatment to successful intervention, and the long history of safe use of mannitol in patients bodes well for its application in CNS gene therapy.
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Optimal transduction of AAV2 vectors in the brain was achieved by IV injection of AAV 8 min after mannitol administration; delivery less than 5 min or 10 min after mannitol infusion was ten times less efficient.
“a study showed that the optimal transduction of AAV2 vectors in the brain was achieved by IV injection of AAV 8 min after mannitol administration; delivery of the vector less than 5 min or 10 min after mannitol infusion was ten times less efficient.”
From Designing and optimizing AAV-mediated gene therapy for neurodegenerative diseases: from bench to bedside (2024) · cites this paper as [133]
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Experimental — accuracy not yet measuredMannitol-mediated BBB disruption allows broad CNS distribution of AAV vectors depending on mannitol dose, infusion route, and virus injection timing.
“Considering above, mannitol-mediated BBB disruption allows broad CNS distribution of AAV vectors depending on the mannitol dose, infusion route as well as virus injection timing [133].”
From Designing and optimizing AAV-mediated gene therapy for neurodegenerative diseases: from bench to bedside (2024) · cites this paper as [133]
The Results section reports diffuse CNS transgene expression after IV mannitol and rAAV2 delivery in mice, and shows that vector-injection timing strongly affected CNS entry. The Introduction and Discussion distinguish IV from intra-arterial delivery, but the paper does not establish how changing the mannitol dose or infusion route affects broad AAV distribution. Page numbers are unavailable in our copy. (LLM, conf=0.86)
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- Authors
- McCarty, D. M., DiRosario, J., Gulaid, K., Muenzer, J., & Fu, H.
- Affiliations
- Nationwide Children's Hospital (US)
- Abigail Wexner Research Institute (US)
- University of North Carolina at Chapel Hill (US)
- ORCID
- Venue
- Gene Therapy
- Published
- 2009-07-09
- Volume
- 16
- Issue
- 11
- Pages
- 1340-1352
- ISSN
- 0969-7128 (ISSN-L)
- 1476-5462
- PMC
- PMC4289609
- OpenAlex
- W1978350886
- Cited by
- 105
- References
- 65
- Citations by year
- 2025: 4 · 2024: 9 · 2023: 2 · 2022: 4 · 2021: 4 · 2020: 7 · 2019: 10 · 2018: 6 · 2017: 1 · 2016: 7 · 2015: 4 · 2014: 10 · 2013: 7 · 2012: 6
- FWCI
- 5.23
- Type
- journal article
- Language
- en
- Open access
- green
- europepmc.org
- Locations
- Gene Therapy (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
- UNC Libraries
- Funders
- Sanfilippo Research Foundation
- National Institute of Diabetes and Digestive and Kidney Diseases (R01DK063972)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Virus-based gene therapy research
- Health Sciences › Medicine › Physiology › Lysosomal Storage Disorders Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
- Keywords
- mannitol, blood-brain barrier, central nervous system gene delivery, mucopolysaccharidosis type IIIB, alpha-N-acetylglucosaminidase, lysosomal storage disease, behavioral performance, survival
- MeSH terms
- Acetylglucosaminidase, Dependovirus, Animals, Blood-Brain Barrier, Genetic Vectors, Mannitol, Mice, Inbred C57BL, Mucopolysaccharidosis III, Recombinant Proteins, Tissue Distribution, Transduction, Genetic, Survival Analysis, Mice, Knockout, Disease Progression, Maze Learning, Mice
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