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Stereotaxic Injection of a Viral Vector for Conditional Gene Manipulation in the Mouse Spinal Cord
Published on: March 18, 2013
Gene transfer to the rhesus monkey brain using SV40-derived vectors is durable and safe
J-P Louboutin1, E Marusich, J Fisher-Perkins
1Department of Pathology, Jefferson Medical College, Thomas Jefferson University, Philadelphia, PA 19107, USA.
Gene Therapy
|March 4, 2011
Summary
Recombinant SV40-derived vectors (rSV40s) show effective gene transfer in rhesus monkey brains, maintaining expression for six months without adverse effects. This suggests potential for long-term gene therapy in the central nervous system.
Area of Science:
- Neuroscience
- Gene Therapy
- Molecular Biology
Background:
- Gene transfer to the central nervous system (CNS) is crucial for treating neurological disorders.
- Recombinant SV40-derived vectors (rSV40s) have demonstrated efficient transduction of neurons and microglia in vitro and in rodent models.
- Assessing rSV40s efficacy and safety in non-human primates is essential for clinical translation.
Purpose of the Study:
- To evaluate the distribution, duration, and safety of rSV40s-mediated gene transfer in the rhesus monkey CNS in vivo.
- To characterize transgene expression patterns in different cell types within the primate brain.
- To determine the potential of rSV40s for long-term gene expression in the primate brain.
Main Methods:
- Stereotactic injection of rSV40s carrying marker genes (HIV-1 RevM10-AU1) or therapeutic genes (antioxidant enzymes) into the caudate nucleus of rhesus monkeys.
- Immunohistochemical analysis of serial brain sections at 1 and 6 months post-injection to assess transgene expression.
- Evaluation of cellular tropism, expression duration, and potential inflammatory or toxic responses.
Main Results:
- Widespread transgene expression was observed in numerous cells following intraparenchymal administration, extending up to 20 mm longitudinally.
- Strong and persistent transgene expression was detected in neurons and, less frequently, in microglial cells for the entire 6-month study period.
- No transduction of astrocytes or oligodendroglia was observed, and no evidence of inflammation or tissue damage was detected.
Conclusions:
- rSV40s facilitate efficient and long-lasting gene expression in the rhesus monkey brain.
- The observed safety profile, with no inflammation or tissue damage, supports the potential utility of rSV40s for CNS gene delivery.
- SV40-derived vectors hold promise for long-term gene expression applications in both primate and potentially human brains.
