Galanin gene transfer curtails generalized seizures in kindled rats without altering hippocampal synaptic plasticity

Kanter Schlifke, Irene (author): Lund University,Lunds universitet,Wallenberg Neurocentrum, Lund,Medicinska fakulteten,Wallenberg Neuroscience Centre, Lund,Faculty of Medicine

Toft Sörensen, Andreas (author): Lund University,Lunds universitet,Neurologi, Lund,Sektion IV,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Wallenberg Neurocentrum, Lund,Neurology, Lund,Section IV,Department of Clinical Sciences, Lund,Faculty of Medicine,Wallenberg Neuroscience Centre, Lund

Ledri, Marco (author): Lund University,Lunds universitet,Neurologi, Lund,Sektion IV,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Neurology, Lund,Section IV,Department of Clinical Sciences, Lund,Faculty of Medicine

Kuteeva, E (author)

Kokaia, Merab (author): Lund University,Lunds universitet,Neurologi, Lund,Sektion IV,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Wallenberg Neurocentrum, Lund,Neurology, Lund,Section IV,Department of Clinical Sciences, Lund,Faculty of Medicine,Wallenberg Neuroscience Centre, Lund

(creator_code:org_t)

Elsevier BV, 2007
2007
English.
In: Neuroscience. - : Elsevier BV. - 1873-7544 .- 0306-4522. ; 150:4, s. 984-992

Related links:: http://dx.doi.org/10...; show more...; https://lup.lub.lu.s...; https://doi.org/10.1...; http://kipublication...; show less...

Abstract Subject headings

Gene therapy-based overexpression of endogenous seizure-suppressing molecules represents a promising treatment strategy for epilepsy. Viral vector-based overexpression of the neuropeptide galanin has been shown to effectively suppress generalized seizures in various animal models of epilepsy. However, it has not been explored whether such treatment can also prevent the epileptogenesis. Using a recombinant adeno-associated viral (rAAV) vector, we induced hippocampal galanin overexpression under the neuron specific enolase promoter in rats. Here we report that in animals with galanin overexpression, the duration of electrographic afterdischarges was shortened and initiation of convulsions was delayed at generalized seizure stages. However, the hippocampal kindling development was unchanged. Short-term plasticity of mossy fiber-cornu ammonis (CA) 3 synapses was unaltered, as assessed by paired-pulse and frequency facilitation of field excitatory postsynaptic potentials (fEPSPs) in hippocampal slices, suggesting that despite high transgene galanin expression, overall release probability of glutamate in these synapses was unaffected. These data indicate that hippocampal rAAV-based galanin overexpression is capable of mediating anticonvulsant effects by lowering the seizure susceptibility once generalized seizures are induced, but does not seem to affect kindling development or presynaptic short-term plasticity in mossy fibers.

By the author/editor: Kanter Schlifke, ...; Toft Sörensen, A ...; Ledri, Marco; Kuteeva, E; Hokfelt, T; Kokaia, Merab

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Basic Medicine; and Neurosciences

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