Hamowanie glutamatergicznego obwodu między jądrem zębatym móżdżku a strefą niepewną poprawia zaburzenia snu w przewlekłej padaczce skroniowej
Inhibition of Cerebellar Dentate Nucleus-Zona Incerta Glutamatergic Circuit Improves Sleep Disturbances in Chronic Temporal Lobe Epilepsy Model
W skrócie
Pacjenci z przewlekłą padaczką skroniową często mają problemy ze snem - śpią krócej i gorzej. Naukowcy odkryli, że specjalne włókna nerwowe łączące móżdżek z pewnymi obszarami mózgu mogą być odpowiedzialne za te zaburzenia. Badania na myszach wykazały, że zablokowanie tych połączeń nerwowych znacznie poprawia sen u zwierząt z padaczką, więc może to być nowym sposobem leczenia problemów ze snem u pacjentów z tą chorobą.
Oryginalny abstract (angielski)
BACKGROUND: Patients with chronic temporal lobe epilepsy (TLE) frequently experience various sleep disorders, characterized by reduced sleep duration, diminished sleep stages, and disrupted sleep patterns. Recent research has identified a population of GABAergic neurons in the ventral zona incerta (ZI) that is instrumental in promoting sleep, along with a neural pathway that connects the cerebellar dentate nucleus (CDN) to the ZI. However, the precise role of this circuit in regulating sleep patterns remains inadequately understood. METHODS: This study employed anatomical, chemogenetic, optogenetic, and immunofluorescence staining techniques to investigate the potential of the CDN-ZI circuit in ameliorating sleep disturbances associated with TLE. RESULTS: Our findings indicate that pilocarpine-treated mice exhibit significant sleep fragmentation and reduced sleep duration, particularly during non-rapid eye movement sleep. By employing optogenetic and chemogenetic methods to target CDN glutamatergic neurons, we observed a decrease in sleep fragmentation, an increase in overall sleep duration, and an enhancement in sleep quality in pilocarpine-treated mice. The inhibition of the CDN-ZI glutamatergic circuit through optogenetic and chemogenetic methods resulted in substantial improvements in sleep disturbances following TLE. CONCLUSIONS: Targeting the CDN-ZI glutamatergic circuit represents a promising therapeutic strategy for addressing sleep disorders resulting from chronic TLE.