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Feng M, Cheng S, Fang Y, Lv L, Guo P, Wang S, Chen H. Augmentation of Sevoflurane inhalation for treatment-resistant depression with different features: A case series. Asian J Psychiatr 2023; 82:103495. [PMID: 36739717 DOI: 10.1016/j.ajp.2023.103495] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 01/11/2023] [Accepted: 01/29/2023] [Indexed: 02/05/2023]
Affiliation(s)
- Min Feng
- Department of Psychiatry, The Third People's Hospital of Huzhou Municipal, The Affiliated Hospital of Huzhou University, Zhejiang, China
| | - Shanfei Cheng
- Department of Psychiatry, The Third People's Hospital of Huzhou Municipal, The Affiliated Hospital of Huzhou University, Zhejiang, China
| | - Yu Fang
- Department of Psychiatry, The Third People's Hospital of Huzhou Municipal, The Affiliated Hospital of Huzhou University, Zhejiang, China
| | - Liang Lv
- Department of Psychiatry, The Third People's Hospital of Huzhou Municipal, The Affiliated Hospital of Huzhou University, Zhejiang, China
| | - Ping Guo
- Department of Psychiatry, The Third People's Hospital of Huzhou Municipal, The Affiliated Hospital of Huzhou University, Zhejiang, China
| | - Shikai Wang
- Department of Psychiatry, The Third People's Hospital of Huzhou Municipal, The Affiliated Hospital of Huzhou University, Zhejiang, China.
| | - Huanxin Chen
- Key Laboratory of Psychiatry, The Third People's Hospital of Huzhou Municipal, The Affiliated Hospital of Huzhou University, Zhejiang, China
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Wu M, Li A, Guo Y, Cao F, You S, Cao J, Mi W, Tong L. GABAergic neurons in the nucleus accumbens core mediate the antidepressant effects of sevoflurane. Eur J Pharmacol 2023; 946:175627. [PMID: 36868292 DOI: 10.1016/j.ejphar.2023.175627] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 02/26/2023] [Accepted: 02/27/2023] [Indexed: 03/05/2023]
Abstract
General anaesthetics have been widely applied to induce reversible loss and recovery of consciousness in clinical practice and have been shown to have reliably safe profiles. Since brief exposure to general anaesthetics can result in long-lasting and global changes in neuronal structures and function, these drugs also exhibit strong therapeutic potential for mood disorders. Preliminary and clinical studies have suggested that the inhalational anaesthetic drug sevoflurane might relieve symptoms of depression. However, the antidepressant effects of sevoflurane and the underlying mechanisms remain elusive. In the present study, we confirmed that the antidepressant and anxiolytic effects of inhaling 2.5% sevoflurane for 30 min were comparable to those of ketamine and could be sustained for 48 h. Activation of GABAergic (γ-aminobutyric acidergic) neurons in the nucleus accumbens core by chemogenetics was shown to mimic the antidepressant effects of inhaled sevoflurane, whereas inhibition of these neurons significantly prevented these effects. Considered together, these results suggested that sevoflurane might exert rapid and long-lasting antidepressant effects via modulation of neuronal activities in the nucleus accumbens core nucleus.
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Affiliation(s)
- Meng Wu
- Anesthesia and Operation Center, The First Medical Center of Chinese PLA General Hospital, Beijing, 100853, China; Department of Anesthesiology, Peking University Shougang Hospital, Beijing, 100144, China
| | - Ao Li
- Anesthesia and Operation Center, The First Medical Center of Chinese PLA General Hospital, Beijing, 100853, China
| | - Yongxin Guo
- Anesthesia and Operation Center, The First Medical Center of Chinese PLA General Hospital, Beijing, 100853, China
| | - Fuyang Cao
- Department of Anesthesia, The Sixth Medical Center of Chinese PLA General Hospital, Beijing, 100048, China
| | - Shaohua You
- Department of Pain Medicine, The First Medical Center of Chinese PLA General Hospital, Beijing, 100853, China
| | - Jiangbei Cao
- Anesthesia and Operation Center, The First Medical Center of Chinese PLA General Hospital, Beijing, 100853, China
| | - Weidong Mi
- Anesthesia and Operation Center, The First Medical Center of Chinese PLA General Hospital, Beijing, 100853, China.
| | - Li Tong
- Anesthesia and Operation Center, The First Medical Center of Chinese PLA General Hospital, Beijing, 100853, China.
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Kohtala S, Rantamäki T. Rapid-acting antidepressants and the regulation of TrkB neurotrophic signalling-Insights from ketamine, nitrous oxide, seizures and anaesthesia. Basic Clin Pharmacol Toxicol 2021; 129:95-103. [PMID: 33973360 DOI: 10.1111/bcpt.13598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 05/03/2021] [Accepted: 05/04/2021] [Indexed: 01/18/2023]
Abstract
Increased glutamatergic neurotransmission and synaptic plasticity in the prefrontal cortex have been associated with the rapid antidepressant effects of ketamine. Activation of BDNF (brain-derived neurotrophic factor) receptor TrkB is considered a key molecular event for antidepressant-induced functional and structural synaptic plasticity. Several mechanisms have been proposed to underlie ketamine's effects on TrkB, but much remains unclear. Notably, preliminary studies suggest that besides ketamine, nitrous oxide (N2 O) can rapidly alleviate depressive symptoms. We have shown nitrous oxide to evoke TrkB signalling preferentially after the acute pharmacological effects have dissipated (ie after receptor disengagement), when slow delta frequency electroencephalogram (EEG) activity is up-regulated. Our findings also demonstrate that various anaesthetics and sedatives activate TrkB signalling, further highlighting the complex mechanisms underlying TrkB activation. We hypothesize that rapid-acting antidepressants share the ability to regulate TrkB signalling during homeostatically evoked slow-wave activity and that this mechanism is important for sustained antidepressant effects. Our observations urge the examination of rapid and sustained antidepressant effects beyond conventional receptor pharmacology by focusing on brain physiology and temporally distributed signalling patterns spanning both wake and sleep. Potential implications of this approach for the improvement of current therapies and discovery of novel antidepressants are discussed.
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Affiliation(s)
- Samuel Kohtala
- Department of Psychiatry, Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY, USA.,Laboratory of Neurotherapeutics, Drug Research Program, Division of Pharmacology and Pharmacotherapy, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.,SleepWell Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Tomi Rantamäki
- Laboratory of Neurotherapeutics, Drug Research Program, Division of Pharmacology and Pharmacotherapy, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.,SleepWell Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
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