منابع مشابه
GABAA receptor-mediated tonic inhibition in thalamic neurons.
Tonic GABAA receptor-mediated inhibition is typically generated by delta subunit-containing extrasynaptic receptors. Because the delta subunit is highly expressed in the thalamus, we tested whether thalamocortical (TC) neurons of the dorsal lateral geniculate nucleus (dLGN) and ventrobasal complex exhibit tonic inhibition. Focal application of gabazine (GBZ) (50 microM) revealed the presence of...
متن کاملMethods for recording and measuring tonic GABAA receptor-mediated inhibition
Tonic inhibitory conductances mediated by GABAA receptors have now been identified and characterized in many different brain regions. Most experimental studies of tonic GABAergic inhibition have been carried out using acute brain slice preparations but tonic currents have been recorded under a variety of different conditions. This diversity of recording conditions is likely to impact upon many ...
متن کاملTonic GABAA receptor-mediated signalling in temporal lobe epilepsy
The tonic activation of extrasynaptic GABAA receptors by extracellular GABA provides a powerful means of regulating neuronal excitability. A consistent finding from studies that have used various models of temporal lobe epilepsy is that tonic GABAA receptor-mediated conductances are largely preserved in epileptic brain (in contrast to synaptic inhibition which is often reduced). Tonic inhibitio...
متن کاملHydrogen peroxide increases GABAA receptor-mediated tonic current in hippocampal neurons.
Hydrogen peroxide (H2O2), a key reactive oxygen species, is produced at low levels during normal cellular metabolism and at higher concentrations under pathological conditions such as ischemia-reperfusion injury. The mechanisms by which H2O2 contributes to physiological and pathological processes in the brain remain poorly understood. Inhibitory GABA type A (GABAA) receptors critically regulate...
متن کاملMolecular basis for the GABAA receptor-mediated tonic inhibition in rat somatosensory cortex.
Fast inhibitory synaptic transmission is primarily mediated by synaptically released gamma-aminobutyric acid (GABA) acting on postsynaptic GABA(A) receptors. GABA acting on GABA(A) receptors produces not only phasic but also tonic inhibitions by persistent activation of extrasynaptic receptors. However, the mechanistic characteristics of tonic inhibition in the neocortex are not well-understood...
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ژورنال
عنوان ژورنال: Epilepsia
سال: 2010
ISSN: 0013-9580
DOI: 10.1111/j.1528-1167.2010.02800.x