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2017 ; 3
(5
): e1602272
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Antiarrhythmics cure brain arrhythmia: The imperativeness of subthalamic ERG K(+)
channels in parkinsonian discharges
#MMPMID28508055
Huang CS
; Wang GH
; Tai CH
; Hu CC
; Yang YC
Sci Adv
2017[May]; 3
(5
): e1602272
PMID28508055
show ga
ERG K(+) channels have long been known to play a crucial role in shaping cardiac
action potentials and, thus, appropriate heart rhythms. The functional role of
ERG channels in the central nervous system, however, remains elusive. We
demonstrated that ERG channels exist in subthalamic neurons and have similar
gating characteristics to those in the heart. ERG channels contribute crucially
not only to the setting of membrane potential and, consequently, the firing
modes, but also to the configuration of burst discharges and, consequently, the
firing frequency and automaticity of the subthalamic neurons. Moreover,
modulation of subthalamic discharges via ERG channels effectively modulates
locomotor behaviors. ERG channel inhibitors ameliorate parkinsonian symptoms,
whereas enhancers render normal animals hypokinetic. Thus, ERG K(+) channels
could be vital to the regulation of both cardiac and neuronal rhythms and may
constitute an important pathophysiological basis and pharmacotherapeutic target
for the growing list of neurological disorders related to "brain arrhythmias."