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Ni X, Yu X, Ye Q, Su X, Shen S. Desflurane improves electrical activity of neurons and alleviates oxygen-glucose deprivation-induced neuronal injury by activating the Kcna1-dependent Kv1.1 channel. Exp Brain Res 2024; 242:477-490. [PMID: 38184806 DOI: 10.1007/s00221-023-06764-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 12/11/2023] [Indexed: 01/08/2024]
Abstract
Several volatile anesthetics have presented neuroprotective functions in ischemic injury. This study investigates the effect of desflurane (Des) on neurons following oxygen-glucose deprivation (OGD) challenge and explores the underpinning mechanism. Mouse neurons HT22 were subjected to OGD, which significantly reduced cell viability, increased lactate dehydrogenase release, and promoted cell apoptosis. In addition, the OGD condition increased oxidative stress in HT22 cells, as manifested by increased ROS and MDA contents, decreased SOD activity and GSH/GSSG ratio, and reduced nuclear protein level of Nrf2. Notably, the oxidative stress and neuronal apoptosis were substantially blocked by Des treatment. Bioinformatics suggested potassium voltage-gated channel subfamily A member 1 (Kcna1) as a target of Des. Indeed, the Kcna1 expression in HT22 cells was decreased by OGD but restored by Des treatment. Artificial knockdown of Kcna1 negated the neuroprotective effects of Des. By upregulating Kcna1, Des activated the Kv1.1 channel, therefore enhancing K+ currents and inducing neuronal repolarization. Pharmacological inhibition of the Kv1.1 channel reversed the protective effects of Des against OGD-induced injury. Collectively, this study demonstrates that Des improves electrical activity of neurons and alleviates OGD-induced neuronal injury by activating the Kcna1-dependent Kv1.1 channel.
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Affiliation(s)
- Xiaolei Ni
- Department of Anesthesiology and Perioperative Medicine, The Affiliated Suqian First People's Hospital of Nanjing Medical University, No. 120, Suzhi Road, Sucheng District, Suqian, 223800, Jiangsu, People's Republic of China
| | - Xiaoyan Yu
- Department of Anesthesiology and Perioperative Medicine, The Affiliated Suqian First People's Hospital of Nanjing Medical University, No. 120, Suzhi Road, Sucheng District, Suqian, 223800, Jiangsu, People's Republic of China
| | - Qingqing Ye
- Department of Anesthesiology and Perioperative Medicine, The Affiliated Suqian First People's Hospital of Nanjing Medical University, No. 120, Suzhi Road, Sucheng District, Suqian, 223800, Jiangsu, People's Republic of China
| | - Xiaohu Su
- Department of Anesthesiology and Perioperative Medicine, The Affiliated Suqian First People's Hospital of Nanjing Medical University, No. 120, Suzhi Road, Sucheng District, Suqian, 223800, Jiangsu, People's Republic of China
| | - Shuai Shen
- Department of Anesthesiology and Perioperative Medicine, The Affiliated Suqian First People's Hospital of Nanjing Medical University, No. 120, Suzhi Road, Sucheng District, Suqian, 223800, Jiangsu, People's Republic of China.
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