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Cearley CN, Wolfe JH. A single injection of an adeno-associated virus vector into nuclei with divergent connections results in widespread vector distribution in the brain and global correction of a neurogenetic disease. J Neurosci 27: 9928-9940

Walter Flato Goodman Center for Comparative Medical Genetics, School of Veterinary Medicine, University of Pennsylvania, and Division of Neurology, Stokes Research Institute, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA.
The Journal of Neuroscience : The Official Journal of the Society for Neuroscience (Impact Factor: 6.75). 10/2007; 27(37):9928-40. DOI: 10.1523/JNEUROSCI.2185-07.2007
Source: PubMed

ABSTRACT Neurogenetic disorders typically affect cells throughout the brain. Adeno-associated virus (AAV) vector-mediated transfer of a normal cDNA can correct the metabolic defects at the site of injection, but treatment of the entire brain requires widespread delivery of the normal gene and/or protein. Current methods require multiple injections for widespread distribution. However, some AAV vectors can be transported along neuronal pathways associated with the injected region. Thus, targeting widely dispersed systems in the CNS might be a pathway for gene dispersal from a limited number of sites. We tested this hypothesis in the ventral tegmental area (VTA), a region with numerous efferent and afferent projections. A single 1 mul injection resulted in transport of the vector genome to projection sites in distal parts of the brain. When compared with injections into the striatum, the VTA injection resulted in higher enzyme levels in more regions of the brain. The AAV-9 serotype vector was the most widely disseminated, but AAV-Rh.10 and AAV-1 were also transported after VTA injection. The effect on global lesions of a neurogenetic disease was tested in the mouse model of MPS VII (mucopolysaccharidosis VII), a lysosomal storage disorder. Widespread distribution of the vector genome after AAV-9 VTA injection resulted in even further distribution of the enzyme product, by secretion and uptake by surrounding cells, and complete correction of the storage lesions throughout the entire brain. This unprecedented level of correction from a single injection into the developed brain provides a potential strategy to correct a large volume of brain while minimizing the number of injections.

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    • "The following neuromuscular junction proteins serve as viral receptors: NCAMs and nAChRs for RABV (Ugolini, 2011), CD155 for poliovirus (Ohka et al., 2004), and the coxsackievirus and adenovirus receptor (CAR) (Salinas et al., 2009). In addition, many viruses that do not infect neurons during natural infections can enter nerve terminals by endocytosis when artificially introduced, for example, during experimental or iatrogenic infections with adenovirus (Salinas et al., 2009), adenoassociated virus (AAV) (Cearley and Wolfe, 2007), and lentivirus vectors (Mazarakis et al., 2001). "
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