The local anaesthetic QX-314 enables enhanced whole-cell recordings of excitatory synaptic currents in rat hippocampal slices in vitro.
Neurosci Lett
; 150(2): 227-30, 1993 Feb 19.
Article
em En
| MEDLINE
| ID: mdl-8385755
ABSTRACT
Whole-cell voltage-clamped currents were recorded using low resistance patch electrodes containing K+ channel blockers with the local anaesthetic QX-314 (20mM). Under these conditions voltage-gated Na+ conductances and regenerative spiking activity were blocked, leaving Ca2+ conductances. The effect of QX-314 resembled that of extracellular tetrodotoxin but had the advantage of being localised to one cell therefore permitting recording of synaptic currents. Excitatory synaptic current recordings were progressively improved over the first 25 minutes of recording as input resistance increased. After this time postsynaptic currents were stable for at least 1 h.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Sinapses
/
Hipocampo
/
Anestésicos Locais
/
Lidocaína
Limite:
Animals
Idioma:
En
Ano de publicação:
1993
Tipo de documento:
Article