Galanin gene transfer curtails generalized seizures in kindled rats without altering hippocampal synaptic plasticity
(2007) In Neuroscience 150(4). p.984-992- Abstract
- 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,... (More)
- 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. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1141382
- author
- Kanter Schlifke, Irene LU ; Toft Sörensen, Andreas LU ; Ledri, Marco LU ; Kuteeva, E ; Hokfelt, T and Kokaia, Merab LU
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Neuroscience
- volume
- 150
- issue
- 4
- pages
- 984 - 992
- publisher
- Elsevier
- external identifiers
-
- pmid:17988802
- wos:000251863100023
- scopus:37049010150
- pmid:17988802
- ISSN
- 1873-7544
- DOI
- 10.1016/j.neuroscience.2007.09.056
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Restorative Neurology (0131000160), Neurology, Lund (013027000)
- id
- be756c93-67f6-4a86-b784-9b2bcdf3bdb0 (old id 1141382)
- date added to LUP
- 2016-04-04 07:08:52
- date last changed
- 2022-04-07 22:19:34
@article{be756c93-67f6-4a86-b784-9b2bcdf3bdb0,
abstract = {{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.}},
author = {{Kanter Schlifke, Irene and Toft Sörensen, Andreas and Ledri, Marco and Kuteeva, E and Hokfelt, T and Kokaia, Merab}},
issn = {{1873-7544}},
language = {{eng}},
number = {{4}},
pages = {{984--992}},
publisher = {{Elsevier}},
series = {{Neuroscience}},
title = {{Galanin gene transfer curtails generalized seizures in kindled rats without altering hippocampal synaptic plasticity}},
url = {{http://dx.doi.org/10.1016/j.neuroscience.2007.09.056}},
doi = {{10.1016/j.neuroscience.2007.09.056}},
volume = {{150}},
year = {{2007}},
}