Cited by 158Virus-based gene therapy researchParkinson's Disease Mechanisms and TreatmentsNeurological disorders and treatments

Eight Years of Clinical Improvement in MPTP-Lesioned Primates After Gene Therapy With AAV2-hAADC

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Hadaczek, Piotr, Eberling, Jamie L, Pivirotto, Philip, Bringas, John, Forsayeth, John, Bankiewicz, Krystof S·2010·Molecular Therapy

Abstract

This study completes the longest known in vivo monitoring of adeno-associated virus (AAV)-mediated gene expression in nonhuman primate (NHP) brain. Although six of the eight parkinsonian NHP originally on study have undergone postmortem analysis, as described previously, we monitored the remaining two animals for a total of 8 years. In this study, NHP received AAV2-human L-amino acid decarboxylase (hAADC) infusions into the MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine)-lesioned putamen. Restoration of AADC activity restored normal response to levodopa and gene expression could be quantitated repeatedly over many years by 6-[(18)F]fluoro-meta-tyrosine (FMT)-positron emission tomography (PET) and confirm that AADC transgene expression remained unchanged at the 8-year point. Behavioral assessments confirmed continued, normalized response to levodopa (improvement by 35% over historical controls). Postmortem analysis showed that, although only 5.6 + or - 1% and 6.6 + or - 1% of neurons within the transduced volumes of the striatum were transduced, this still secured robust clinical improvement. Importantly, there were no signs of neuroinflammation or reactive gliosis at the 8-year point, indicative of the safety of this treatment. The present data suggest that the improvement in the L-3,4-dihydroxyphenylalanine (L-Dopa) therapeutic window brought about by AADC gene therapy is pronounced and persistent for many years.

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Crossref · 10.1038/mt.2010.106

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Authors
Hadaczek, P., Eberling, J. L., Pivirotto, P., Bringas, J., Forsayeth, J., & Bankiewicz, K. S.
Affiliations
University of California, San Francisco (US)
Corresponding author
Hadaczek, Piotr
Venue
Molecular Therapy
Publisher
Elsevier BV
Published
2010-08
Volume
18
Issue
8
Pages
1458-1461
ISSN
1525-0016 (ISSN-L)
OpenAlex
W1965684916
Cited by
158
References
15
Citations by year
2026: 5 · 2025: 8 · 2024: 8 · 2023: 6 · 2022: 5 · 2021: 8 · 2020: 11 · 2019: 8 · 2018: 10 · 2017: 9 · 2016: 8 · 2015: 14 · 2014: 14 · 2013: 13 · 2012: 11
FWCI
7.92
Type
journal article
Language
en
Open access
Locations
  • Molecular Therapy (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of Neurological Disorders and Stroke (NS061802)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Virus-based gene therapy research
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
Keywords
MPTP-induced parkinsonism, nonhuman primate model, long-term transgene expression, levodopa response, neuroinflammation, reactive gliosis, gene therapy safety, Parkinson's disease
MeSH terms
Dependovirus, Animals, Aromatic-L-Amino-Acid Decarboxylases, Brain, Corpus Striatum, Dopamine, Immunohistochemistry, Levodopa, Macaca mulatta, Male, Microscopy, Fluorescence

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