Bicarbonate contributes to GABAA receptor-mediated neuronal excitation in surgically resected human hypothalamic hamartomas.
Bicarbonate contributes to GABAA receptor-mediated neuronal excitation in surgically resected human hypothalamic hamartomas.
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DOI:
10.1016/j.eplepsyres.2008.09.008
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发表时间:
2009-01
影响因子:
2.2
通讯作者:
Rho, Jong M.
中科院分区:
文献类型:
--
作者:
Kim, Do-Young;Fenoglio, Kristina A.;Kerrigan, John F.;Rho, Jong M.
The role of bicarbonate (HCO3-) in GABAA receptor-mediated depolarization of human hypothalamic hamartoma (HH) neurons was investigated using cellular electrophysiological and calcium imaging techniques. Activation of GABAA receptors with muscimol (30 μM) provoked neuronal excitation in over 70% of large (18-22 μM) HH neurons in HCO3- buffer. Subsequent perfusion of HCO3--free HEPES buffer produced partial suppression of muscimol-induced excitation. Additionally, 53% of large HH neurons under HCO3--free conditions exhibited reduced intracellular calcium accumulation by muscimol. These results suggest that HCO3- efflux through GABAA receptors on a subpopulation of large HH neurons may contribute to membrane depolarization and subsequent activation of L-type calcium channels.
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影响因子:
6.7
作者:
Thiry, Anne;Rolin, Stephanie;Masereel, Bernard
通讯作者:
Masereel, Bernard
影响因子:
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作者:
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影响因子:
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作者:
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DOI:
10.1073/pnas.0602979103
发表时间:
2006-05-30
影响因子:
11.1
作者:
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通讯作者:
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影响因子:
11.2
作者:
BERKOVIC, SF;ANDERMANN, F;GLOOR, P
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GLOOR, P