Redox modulation of large conductance calcium-activated potassium channels in rat cultured trigeminal ganglion neurons / 中国应用生理学杂志
Chinese Journal of Applied Physiology
; (6): 390-393, 2006.
Article
em Zh
| WPRIM
| ID: wpr-253133
Biblioteca responsável:
WPRO
ABSTRACT
<p><b>AIM</b>To observe redox modulation of ion channel in trigeminal ganglion neurons by oxidants and reducing agents.</p><p><b>METHODS</b>The effects of oxidants and reducing agents on maxi-conductance calcium-activated potassium channel in cultured rat trigeminal ganglion neurons by using whole-cell patch-clamp technique.</p><p><b>RESULTS</b>Methionine-specific oxidant chloramine-T (Ch-T) 1 mmol/L slightly increased the current amplitude and this enhancement did not antagonized by DTT. In contrast, cysteine-specific reagent 5, 5'-dithio-bis(2-nitrobenzoic acid) (DTNB) 500 micromol/L significantly decreased current amplitude of BK(Ca) channels. The effect was reversed by the reducing agent 2 mmol/L 1, 4-dithio-DL-threitol (DTT).</p><p><b>CONCLUSION</b>Reactive oxygen species were definitely involved in regulation of native neuronal function via redox modulation of BK(Ca) channels, which are suggested to play compensatory roles under oxidative stress-related conditions.</p>
Texto completo:
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Índice:
WPRIM
Assunto principal:
Oxirredução
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Fisiologia
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Células Cultivadas
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Gânglio Trigeminal
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Ratos Sprague-Dawley
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Técnicas de Patch-Clamp
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Biologia Celular
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Canais de Potássio Ativados por Cálcio de Condutância Alta
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Metabolismo
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Neurônios
Limite:
Animals
Idioma:
Zh
Revista:
Chinese Journal of Applied Physiology
Ano de publicação:
2006
Tipo de documento:
Article