Locus Coeruleus to Paraventricular Thalamus Projections Facilitate Emergence From Isoflurane Anesthesia in Mice
| Autor: | Bo Wu, Caiju Zhang, Yawen Ao, Xuefen Zhang, Dong Xing, Haibo Xu, Bo Yang |
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| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
RM1-950 Optogenetics Biology Arousal 03 medical and health sciences 0302 clinical medicine medicine emergence Pharmacology (medical) Original Research Pharmacology optogenetics and DREADDs locus coeruleus general anesthesia Electrophysiology 030104 developmental biology Isoflurane Anesthesia paraventricular thalamus Anesthetic Locus coeruleus Paraventricular thalamus Wakefulness Therapeutics. Pharmacology 030217 neurology & neurosurgery medicine.drug |
| Zdroj: | Frontiers in Pharmacology Frontiers in Pharmacology, Vol 12 (2021) |
| ISSN: | 1663-9812 |
| DOI: | 10.3389/fphar.2021.643172 |
| Popis: | Locus coeruleus (LC) sends widespread outputs to many brain regions to modulate diverse functions, including sleep/wake states, attention, and the general anesthetic state. The paraventricular thalamus (PVT) is a critical thalamic area for arousal and receives dense tyrosine-hydroxylase (TH) inputs from the LC. Although anesthesia and sleep may share a common pathway, it is important to understand the processes underlying emergence from anesthesia. In this study, we hypothesize that LC TH neurons and the TH:LC-PVT circuit may be involved in regulating emergence from anesthesia. Only male mice are used in this study. Here, using c-Fos as a marker of neural activity, we identify LC TH expressing neurons are active during anesthesia emergence. Remarkably, chemogenetic activation of LC TH neurons shortens emergence time from anesthesia and promotes cortical arousal. Moreover, enhanced c-Fos expression is observed in the PVT after LC TH neurons activation. Optogenetic activation of the TH:LC-PVT projections accelerates emergence from anesthesia, whereas, chemogenetic inhibition of the TH:LC-PVT circuit prolongs time to wakefulness. Furthermore, optogenetic activation of the TH:LC-PVT projections produces electrophysiological evidence of arousal. Together, these results demonstrate that activation of the TH:LC-PVT projections is helpful in facilitating the transition from isoflurane anesthesia to an arousal state, which may provide a new strategy in shortening the emergence time after general anesthesia. |
| Databáze: | OpenAIRE |
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