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- Title
Recombinant AAV-mediated expression of galanin in rat hippocampus suppresses seizure development.
- Authors
Lin, En‐Ju D.; Richichi, Cristina; Young, Deborah; Baer, Kristin; Vezzani, Annamaria; During, Matthew J.
- Abstract
Galanin, a 29- or 30-amino acid neuropeptide, has been implicated in the modulation of seizures. In this study, we constructed a recombinant adeno-associated viral (AAV) vector to constitutively over-express galanin (AAV-GAL). The vector mediated efficient transduction of HEK 293 cells in vitro and robust galanin expression in vivo when injected into the rat dorsal hippocampus. Rats were administered kainic acid intrahippocampally 2.5 months following AAV-GAL or empty vector (AAV-Empty) injection to study the effect of vector-mediated galanin over-expression on seizures. AAV-GAL-injected rats showed a decreased number of seizure episodes and total time spent in seizures compared to AAV-Empty rats, despite similar latencies to development of the first EEG seizure and similar levels of neuronal damage in the CA3 region for both groups. These data show that recombinant AAV mediates strong and stable over-expression of galanin when injected into the rat hippocampus resulting in a significant anticonvulsive effect. The seizure suppression effect of galanin expression in the hippocampus by viral vectors may lead to novel therapeutic strategies for the treatment and management of intractable seizures with focal onset such as temporal lobe epilepsy.
- Subjects
GALANIN; GENETIC vectors; HIPPOCAMPUS (Brain)
- Publication
European Journal of Neuroscience, 2003, Vol 18, Issue 7, p2087
- ISSN
0953-816X
- Publication type
Article
- DOI
10.1046/j.1460-9568.2003.02926.x