A knock-in Drosophila model supports a conserved link between potassium channelopathy and involuntary movement
A knock-in Drosophila model supports a conserved link between potassium channelopathy and involuntary movement
复制标题
敲入果蝇模型支持钾离子通道病和不自主运动之间的保守联系
DOI:
10.1101/2020.02.20.957571
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Kratschmer P
中科院分区:
文献类型:
--
作者:
Kratschmer P
BackgroundGenetic and in vitro studies have linked a heterozygous gain-of-function mutation (D434G) in the hSlo1 BK (Big potassium) channel to paroxysmal dyskinesia. However, support for this linkage from in vivo models has been lacking.ObjectivesWe aimed to re-create the equivalent mutation to hSlo1 D434G in the fruit fly,Drosophila, and examine how this mutation altered movement and action potential waveforms.MethodsWe generated a knock-inDrosophilamodel of hSlo1 D434G. We used video-tracking and infra-red beam-break systems to test whether locomotion was altered in this model, and patch-clamp electrophysiology to determine how the mutation affected action potential waveforms.ResultsWe identified profound motor dysfunction and sporadic leg twitches, as well as a reduced width and an enhancement of the afterhyperpolarization phase of action potentials, in the model background.ConclusionOur results support a conserved relationship between enhanced BK channel function and disrupted motor control across distantly related species.
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