Diazepam-insensitive GABA(A) receptors on postnatal spiral ganglion neurones in culture

Brigitte Malgrange; Jean Michel Rigo; Philippe P. Lefebvre; Paul Coucke; Frédéric Goffin; Gaël Xhauflaire; Shibeshih Belachew; Thomas R. Van De Water; Gustave Moonen

doi:10.1097/00001756-199702100-00003

Diazepam-insensitive GABA(A) receptors on postnatal spiral ganglion neurones in culture

Brigitte Malgrange, Jean Michel Rigo, Philippe P. Lefebvre, Paul Coucke, Frédéric Goffin, Gaël Xhauflaire, Shibeshih Belachew, Thomas R. Van De Water, Gustave Moonen

Otolaryngology

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Using dissociated spiral ganglion cell cultures obtained from 3-day-old rat cochlea, we investigated the response of auditory neurones to γ-aminobutyric acid (GABA) using patch-clamp techniques. In our recording conditions, GABA elicited inward currents in > 95% of the neurones which reversed around 0 mV. Similar inward currents were measured using isoguvacin, a specific agonist of GABA(A) receptors. GABA-gated currents were reversibly inhibited by the channel blocker picrotoxin and the GABA competitive antagonist bicuculline. These functional GABA(A) receptors are characterized by an insensitivity to benzodiazepines and a relatively high sensitivity to β-carbolines and barbiturates. These results show that the GABA(A) receptor pharmacological properties of spiral ganglion neurones are close to those of cerebellar granule cells.

Original language	English (US)
Pages (from-to)	591-596
Number of pages	6
Journal	Neuroreport
Volume	8
Issue number	3
DOIs	https://doi.org/10.1097/00001756-199702100-00003
State	Published - Jan 1 1997

Keywords

afferent auditory neurones
benzodiazepines
GABA(A) receptor
patch-clamp

ASJC Scopus subject areas

Neuroscience(all)

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10.1097/00001756-199702100-00003

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Diazepam-insensitive GABA(A) receptors on postnatal spiral ganglion neurones in culture. / Malgrange, Brigitte; Rigo, Jean Michel; Lefebvre, Philippe P.; Coucke, Paul; Goffin, Frédéric; Xhauflaire, Gaël; Belachew, Shibeshih; Van De Water, Thomas R.; Moonen, Gustave.

In: Neuroreport, Vol. 8, No. 3, 01.01.1997, p. 591-596.

Research output: Contribution to journal › Article › peer-review

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abstract = "Using dissociated spiral ganglion cell cultures obtained from 3-day-old rat cochlea, we investigated the response of auditory neurones to γ-aminobutyric acid (GABA) using patch-clamp techniques. In our recording conditions, GABA elicited inward currents in > 95% of the neurones which reversed around 0 mV. Similar inward currents were measured using isoguvacin, a specific agonist of GABA(A) receptors. GABA-gated currents were reversibly inhibited by the channel blocker picrotoxin and the GABA competitive antagonist bicuculline. These functional GABA(A) receptors are characterized by an insensitivity to benzodiazepines and a relatively high sensitivity to β-carbolines and barbiturates. These results show that the GABA(A) receptor pharmacological properties of spiral ganglion neurones are close to those of cerebellar granule cells.",

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AU - Rigo, Jean Michel

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AU - Coucke, Paul

AU - Goffin, Frédéric

AU - Xhauflaire, Gaël

AU - Belachew, Shibeshih

AU - Van De Water, Thomas R.

AU - Moonen, Gustave

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Diazepam-insensitive GABA(A) receptors on postnatal spiral ganglion neurones in culture

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