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Expression Of Functional Kir6.1 Channels Regulates Glutamate Release At Ca3 Synapses In Generation Of Epileptic Form Of Seizures
Authors
Lisheng Peng
Ronald S. Petralia
+3 more
Mangala M. Soundarapandian
Di Wu
Xiaofen Zhong
Publication date
1 December 2007
Publisher
'Information Bulletin on Variable Stars (IBVS)'
Abstract
The Kir6.1 channels are a subtype of ATP-sensitive inwardly rectifying potassium (KATP) channels that play an essential role in coupling the cell\u27s metabolic events to electrical activity. In this study, we show that functional Kir6.1 channels are located at excitatory pre-synaptic terminals as a complex with type-1 Sulfonylurea receptors (SUR1) in the hippocampus. The mutant mice with deficiencies in expressing the Kir6.1 or the SUR1 gene are more vulnerable to generation of epileptic form of seizures, compared to wild-type controls. Whole-cell patch clamp recordings demonstrate that genetic deletion of the Kir6.1/SUR1 channels enhances glutamate release at CA3 synapses. Hence, expression of functional Kir6.1/SUR1 channels inhibits seizure responses and possibly acts via limiting excitatory glutamate release. © 2007 The Authors
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Last time updated on 18/10/2022