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Chen L, Zhang Y, Wang Z, Zhang Z, Wang J, Zhu G, Yang S. Activation of GPER1 by G1 prevents PTSD-like behaviors in mice: Illustrating the mechanisms from BDNF/TrkB to mitochondria and synaptic connection. CNS Neurosci Ther 2024; 30:e14855. [PMID: 38992889 PMCID: PMC11239537 DOI: 10.1111/cns.14855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 06/11/2024] [Accepted: 06/29/2024] [Indexed: 07/13/2024] Open
Abstract
BACKGROUND G1 is a specific agonist of G protein-coupled estrogen receptor 1 (GPER1), which binds and activates GPER1 to exert various neurological functions. However, the preventive effect of G1 on post-traumatic stress disorder (PTSD) and its mechanisms are unclear. OBJECTIVE To evaluate the protective effect of G1 against synaptic and mitochondrial impairments and to investigate the mechanism of G1 to improve PTSD from brain-derived neurotrophic factor (BDNF)/tyrosine kinase receptor B (TrkB) signaling. METHODS This study initially detected GPER1 expression in the hippocampus of single prolonged stress (SPS) mice, utilizing both Western blot and immunofluorescence staining. Subsequently, the effects of G1 on PTSD-like behaviors, synaptic, and mitochondrial functions in SPS mice were investigated. Additionally, the involvement of BDNF/TrkB signaling involved in the protection was further confirmed using GPER1 antagonist and TrkB inhibitor, respectively. RESULTS The expression of GPER1 was reduced in the hippocampus of SPS mice, and G1 treatment given for 14 consecutive days significantly improved PTSD-like behaviors in SPS mice compared with model group. Electrophysiological local field potential (LFP) results showed that G1 administration for 14 consecutive days could reverse the abnormal changes in the gamma oscillation in the CA1 region of SPS mice. Meanwhile, G1 administration for 14 consecutive days could significantly improve the abnormal expression of synaptic proteins, increase the expression of mitochondria-related proteins, increase the number of synapses in the hippocampus, and ameliorate the damage of hippocampal mitochondrial structure in SPS mice. In addition, G15 (GPER1 inhibitor) and ANA-12 (TrkB inhibitor) blocked the ameliorative effects of G1 on PTSD-like behaviors and aberrant expression of hippocampal synaptic and mitochondrial proteins in SPS mice and inhibited the reparative effects of G1 on structural damage to hippocampal mitochondria, respectively. CONCLUSION G1 improved PTSD-like behaviors in SPS mice, possibly by increasing hippocampal GPER1 expression and promoting BDNF/TrkB signaling to repair synaptic and mitochondrial functional impairments. This study would provide critical mechanism for the prevention and treatment of PTSD.
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Affiliation(s)
- Lixia Chen
- Center for Xin'an Medicine and Modernization of Traditional Chinese Medicine of IHM, Key Laboratory of Molecular Biology (Brain diseases), Anhui University of Chinese Medicine, Hefei, China
| | - Yang Zhang
- Center for Xin'an Medicine and Modernization of Traditional Chinese Medicine of IHM, Key Laboratory of Molecular Biology (Brain diseases), Anhui University of Chinese Medicine, Hefei, China
| | - Zisheng Wang
- Center for Xin'an Medicine and Modernization of Traditional Chinese Medicine of IHM, Key Laboratory of Molecular Biology (Brain diseases), Anhui University of Chinese Medicine, Hefei, China
| | - Zhengrong Zhang
- Center for Xin'an Medicine and Modernization of Traditional Chinese Medicine of IHM, Key Laboratory of Molecular Biology (Brain diseases), Anhui University of Chinese Medicine, Hefei, China
| | - Jingji Wang
- Acupuncture and Moxibustion Clinical Medical Research Center of Anhui Province, The Second Affiliation Hospital of Anhui University of Chinese Medicine, Hefei, China
| | - Guoqi Zhu
- Center for Xin'an Medicine and Modernization of Traditional Chinese Medicine of IHM, Key Laboratory of Molecular Biology (Brain diseases), Anhui University of Chinese Medicine, Hefei, China
| | - Shaojie Yang
- Acupuncture and Moxibustion Clinical Medical Research Center of Anhui Province, The Second Affiliation Hospital of Anhui University of Chinese Medicine, Hefei, China
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Sun Y, Song X, Geng Z, Xu Y, Xiao L, Chen Y, Li B, Shi J, Wang L, Wang Y, Zhang X, Zuo L, Li J, Lü H, Hu J. IL-11 ameliorates oxidative stress damage in neurons after spinal cord injury by activating the JAK/STAT signaling pathway. Int Immunopharmacol 2024; 127:111367. [PMID: 38160564 DOI: 10.1016/j.intimp.2023.111367] [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: 11/06/2023] [Revised: 12/07/2023] [Accepted: 12/10/2023] [Indexed: 01/03/2024]
Abstract
OBJECTIVE Excess reactive oxygen species (ROS) generated by oxidative stress is a crucial factor affecting neuronal dysfunction after spinal cord injury (SCI). IL-11 has been reported to have antioxidative stress capacity. In the present study, we investigated the protective effect and mechanism of IL-11 against neuronal cell damage caused by oxidative imbalance. METHODS We established a H2O2-induced oxidative stress injury model in PC12 cells and observed the effects of IL-11 on cellular activity, morphology, oxidase and antioxidant enzymes, and ROS release. Furthermore, the effect of IL-11 on apoptosis of PC12 cells was assessed by flow cytometry, a TUNEL assay and Western blotting. Transcriptome analysis and rescue experiments revealed the mechanism by which IL-11 protects neurons from oxidative stress damage. For the in vivo investigation, an adenovirus-mediated IL-11 overexpression SCI rat model was constructed to validate the beneficial effect of IL-11 against SCI. RESULTS IL-11 significantly improved the viability and enhanced the antioxidant activity of H2O2-treated PC12 cells while reducing ROS release. In addition, IL-11 reduced H2O2-induced PC12 cell apoptosis. Transcriptome analysis revealed that the JAK/STAT pathway may be related to the antioxidant activity of IL-11. Treatment with a JAK/STAT inhibitor (Stattic) exacerbated the oxidative damage induced by H2O2 and attenuated the protective effects of IL-11. The results of in vivo studies showed that IL-11 prevented neuronal apoptosis due to oxidative imbalance and promoted the restoration of motor function in SCI rats by activating the JAK/STAT signaling pathway. CONCLUSION IL-11 inhibited oxidative stress-induced neuronal apoptosis at least in part by activating the JAK/STAT signaling pathway and further promoted the recovery of motor function. These findings suggest that IL-11 may be an effective target for the treatment for SCI.
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Affiliation(s)
- Yang Sun
- Department of rehabilitation medicine, First Affiliated Hospital of Bengbu Medical University, Bengbu, Anhui, China
| | - Xue Song
- Department of Central Laboratory, First Affiliated Hospital of Bengbu Medical University, Bengbu, China; Inflammatory Bowel Disease Research Center, First Affiliated Hospital of Bengbu Medical University, Bengbu, China; Anhui Province Key Laboratory of Basic and Translational Research of Inflammation-related Diseases, Bengbu, China
| | - Zhijun Geng
- Department of Central Laboratory, First Affiliated Hospital of Bengbu Medical University, Bengbu, China; Inflammatory Bowel Disease Research Center, First Affiliated Hospital of Bengbu Medical University, Bengbu, China; Anhui Province Key Laboratory of Basic and Translational Research of Inflammation-related Diseases, Bengbu, China
| | - Yibo Xu
- Bengbu Medical University, Bengbu, China
| | - Linyu Xiao
- Department of rehabilitation medicine, First Affiliated Hospital of Bengbu Medical University, Bengbu, Anhui, China; Bengbu Medical University, Bengbu, China
| | - Yue Chen
- Department of rehabilitation medicine, First Affiliated Hospital of Bengbu Medical University, Bengbu, Anhui, China; Bengbu Medical University, Bengbu, China
| | - Bohan Li
- Bengbu Medical University, Bengbu, China
| | - Jinran Shi
- Bengbu Medical University, Bengbu, China
| | - Lian Wang
- Inflammatory Bowel Disease Research Center, First Affiliated Hospital of Bengbu Medical University, Bengbu, China; Anhui Province Key Laboratory of Basic and Translational Research of Inflammation-related Diseases, Bengbu, China; Department of Gastrointestinal Surgery, First Affiliated Hospital of Bengbu Medical University, Bengbu, Anhui, China
| | - Yueyue Wang
- Inflammatory Bowel Disease Research Center, First Affiliated Hospital of Bengbu Medical University, Bengbu, China; Anhui Province Key Laboratory of Basic and Translational Research of Inflammation-related Diseases, Bengbu, China; Department of Clinical Laboratory, First Affiliated Hospital of Bengbu Medical University, Bengbu, China
| | - Xiaofeng Zhang
- Department of Central Laboratory, First Affiliated Hospital of Bengbu Medical University, Bengbu, China; Inflammatory Bowel Disease Research Center, First Affiliated Hospital of Bengbu Medical University, Bengbu, China; Anhui Province Key Laboratory of Basic and Translational Research of Inflammation-related Diseases, Bengbu, China
| | - Lugen Zuo
- Inflammatory Bowel Disease Research Center, First Affiliated Hospital of Bengbu Medical University, Bengbu, China; Anhui Province Key Laboratory of Basic and Translational Research of Inflammation-related Diseases, Bengbu, China; Department of Gastrointestinal Surgery, First Affiliated Hospital of Bengbu Medical University, Bengbu, Anhui, China
| | - Jing Li
- Inflammatory Bowel Disease Research Center, First Affiliated Hospital of Bengbu Medical University, Bengbu, China; Anhui Province Key Laboratory of Basic and Translational Research of Inflammation-related Diseases, Bengbu, China; Department of Clinical Laboratory, First Affiliated Hospital of Bengbu Medical University, Bengbu, China
| | - Hezuo Lü
- Anhui Province Key Laboratory of Basic and Translational Research of Inflammation-related Diseases, Bengbu, China; Department of Gastrointestinal Surgery, First Affiliated Hospital of Bengbu Medical University, Bengbu, Anhui, China.
| | - Jianguo Hu
- Inflammatory Bowel Disease Research Center, First Affiliated Hospital of Bengbu Medical University, Bengbu, China; Anhui Province Key Laboratory of Basic and Translational Research of Inflammation-related Diseases, Bengbu, China; Department of Clinical Laboratory, First Affiliated Hospital of Bengbu Medical University, Bengbu, China.
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