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Rogers, Anna A.; Aiani, Lauren M.; Blanpain, Lou T.; Yuxian, Sun; Moore, Renee; Willie, Jon T.
Brain stimulation, September-October 2020, 2020 Sep - Oct, 2020-09-00, 20200901, 2020-09-01, Letnik: 13, Številka: 5Journal Article
Narcolepsy type 1 (NT1, narcolepsy with cataplexy) is a disabling neurological disorder caused by loss of excitatory orexin neurons from the hypothalamus and is characterized by decreased motivation, sleep-wake fragmentation, intrusion of rapid-eye-movement sleep (REMS) during wake, and abrupt loss of muscle tone, called cataplexy, in response to sudden emotions. We investigated whether subcortical stimulation, analogous to clinical deep brain stimulation (DBS), would ameliorate NT1 using a validated transgenic mouse model with postnatal orexin neuron degeneration. Using implanted electrodes in freely behaving mice, the immediate and prolonged effects of DBS were determined upon behavior using continuous video-electroencephalogram-electromyogram (video/EEG/EMG) and locomotor activity, and neural activation in brain sections, using immunohistochemical labeling of the immediate early gene product c-Fos. Brief 10-s stimulation to the region of the lateral hypothalamus and zona incerta (LH/ZI) dose-responsively reversed established sleep and cataplexy episodes without negative sequelae. Continuous 3-h stimulation increased ambulation, improved sleep-wake consolidation, and ameliorated cataplexy. Brain c-Fos from mice sacrificed after 90 min of DBS revealed dose-responsive neural activation within wake-active nuclei of the basal forebrain, hypothalamus, thalamus, and ventral midbrain. Acute and continuous LH/ZI DBS enhanced behavioral state control in a mouse model of NT1, supporting the feasibility of clinical DBS for NT1 and other sleep-wake disorders. •Hypothalamic DBS dose-responsively reverses sleep and cataplexy in mouse narcolepsy.•Hypothalamic DBS consolidates wakefulness and ameliorates cataplexy in mouse narcolepsy.•DBS activates Fos expression in wake-active nuclei of the hypothalamus, thalamus, and brainstem.•Neuromodulation of sleep-wakefulness for a primary sleep disorder appears feasible.
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