Reduced hippocampal GABAergic function in Wistar audiogenic rats
Braz. j. med. biol. res
; 44(10): 1054-1059, Oct. 2011. ilus
Article
в En
| LILACS
| ID: lil-600698
Ответственная библиотека:
BR1.1
ABSTRACT
Epilepsy is a neurological disorder associated with excitatory and inhibitory imbalance within the underlying neural network. This study evaluated inhibitory γ-amino-butyric acid (GABA)ergic modulation in the CA1 region of the hippocampus of male Wistar rats and Wistar audiogenic rats (aged 90 ± 3 days), a strain of inbred animals susceptible to audiogenic seizures. Field excitatory postsynaptic potentials and population spike complexes in response to Schaffer collateral fiber stimulation were recorded in hippocampal slices before and during application of picrotoxin (50 µM, 60 min), a GABA A antagonist, and the size of the population spike was quantified by measuring its amplitude and slope. In control audiogenic-resistant Wistar rats (N = 9), picrotoxin significantly increased both the amplitude of the population spike by 51 ± 19 percent and its maximum slope by 73 ± 21 percent. In contrast, in slices from Wistar audiogenic rats (N = 6), picrotoxin caused no statistically significant change in population spike amplitude (33 ± 46 percent) or slope (11 ± 29 percent). Data are reported as means ± SEM. This result indicates a functional reduction of GABAergic neurotransmission in hippocampal slices from Wistar audiogenic rats.
Key words
Полный текст:
1
База данных:
LILACS
Основная тема:
Picrotoxin
/
Synaptic Transmission
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GABA Antagonists
/
Epilepsy
/
CA1 Region, Hippocampal
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Gamma-Aminobutyric Acid
Пределы темы:
Animals
Язык:
En
Журнал:
Braz. j. med. biol. res
Тематика журнала:
BIOLOGIA
/
MEDICINA
Год:
2011
Тип:
Article