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Yu Y, Li P, Chen M, Zhan W, Zhu T, Min L, Liu H, Lv B. MiR-122 overexpression alleviates oxygen-glucose deprivation-induced neuronal injury by targeting sPLA2-IIA. Front Neurol 2024; 15:1395833. [PMID: 38798705 PMCID: PMC11127566 DOI: 10.3389/fneur.2024.1395833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 04/26/2024] [Indexed: 05/29/2024] Open
Abstract
Background Ischemic stroke (IS) is a neurological disease with significant disability and mortality. MicroRNAs were proven to be associated with cerebral ischemia. Previous studies have demonstrated miR-122 downregulation in both animal models of IS and the blood of IS patients. Nonetheless, the role and mechanism of miR-122-5p in IS remain unclear. Methods We established primary human and mouse astrocytes, along with HT22 mouse hippocampal neuronal cells, through oxygen-glucose deprivation/reoxygenation (OGD/R) treatment. To assess the impact of miR-122, we employed CCK8 assays, flow cytometry, RT-qPCR, western blotting, and ELISA to evaluate cell viability, apoptosis, reactive oxygen species (ROS) generation, and cytokine expression. A dual-luciferase reporter gene assay was employed to investigate the interaction between miR-122 and sPLA2-IIA. Results Overexpression of miR-122 resulted in decreased apoptosis, reduced cleaved caspase-3 expression, and increased cell viability in astrocytes and HT22 cells subjected to OGD/R. RT-qPCR and ELISA analyses demonstrated a decrease in mRNA and cytokine levels of interleukin (IL)-6 and tumor necrosis factor (TNF)-α in both astrocytes and HT22 cells following miR-122 overexpression. Moreover, miR-122 overexpression reversed OGD/R-induced ROS levels and 8-OHdG formation in astrocytes. Additionally, miR-122 overexpression decreased the mRNA and protein expression of inducible nitric oxide synthase (iNOS). Furthermore, we found that miR-122 attaches to the 3'-UTR of sPLA2-IIA, thereby downregulate its expression. Conclusion Our study demonstrates that miR-122-mediated inhibition of sPLA2-IIA attenuates OGD/R-induced neuronal injury by suppressing apoptosis, alleviating post-ischemic inflammation, and reducing ROS production. Thus, the miR-122/sPLA2-IIA axis may represent a promising target for IS treatment.
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Affiliation(s)
- Yuanfang Yu
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Department of General Practice, Guangdong Geriatrics Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Pan Li
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China
| | - Mengyuan Chen
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Department of General Practice, Guangdong Geriatrics Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Wenfeng Zhan
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Department of General Practice, Guangdong Geriatrics Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Ting Zhu
- Department of Laboratory Medicine, Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China
| | - Ling Min
- Department of Laboratory Medicine, Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China
| | - Hao Liu
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China
| | - Bo Lv
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Department of General Practice, Guangdong Geriatrics Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
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Wang S, Pan Y, Zhang C, Zhao Y, Wang H, Ma H, Sun J, Zhang S, Yao J, Xie D, Zhang Y. Transcriptome Analysis Reveals Dynamic Microglial-Induced A1 Astrocyte Reactivity via C3/C3aR/NF-κB Signaling After Ischemic Stroke. Mol Neurobiol 2024:10.1007/s12035-024-04210-8. [PMID: 38713438 DOI: 10.1007/s12035-024-04210-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 04/26/2024] [Indexed: 05/08/2024]
Abstract
Microglia and astrocytes are key players in neuroinflammation and ischemic stroke. A1 astrocytes are a subtype of astrocytes that are extremely neurotoxic and quickly kill neurons. Although the detrimental A1 astrocytes are present in many neurodegenerative diseases and are considered to accelerate neurodegeneration, their role in the pathophysiology of ischemic stroke is poorly understood. Here, we combined RNA-seq, molecular and immunological techniques, and behavioral tests to investigate the role of A1 astrocytes in the pathophysiology of ischemic stroke. We found that astrocyte phenotypes change from a beneficial A2 type in the acute phase to a detrimental A1 type in the chronic phase following ischemic stroke. The activated microglial IL1α, TNF, and C1q prompt commitment of A1 astrocytes. Inhibition of A1 astrocytes induction attenuates reactive gliosis and ameliorates morphological and functional defects following ischemic stroke. The crosstalk between astrocytic C3 and microglial C3aR contributes to the formation of A1 astrocytes and morphological and functional defects. In addition, NF-κB is activated following ischemic stroke and governs the formation of A1 astrocytes via direct targeting of inflammatory cytokines and chemokines. Taken together, we discovered that A2 astrocytes and A1 astrocytes are enriched in the acute and chronic phases of ischemic stroke respectively, and that the C3/C3aR/NF-κB signaling leads to A1 astrocytes induction. Therefore, the C3/C3aR/NF-κB signaling is a novel therapeutic target for ischemic stroke treatment.
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Affiliation(s)
- Song Wang
- Experimental and Translational Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China.
- Beijing Clinical Research Institute, Beijing, 100050, China.
| | - Yuhualei Pan
- Experimental and Translational Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
- Beijing Clinical Research Institute, Beijing, 100050, China
- Immunology Research Center for Oral and Systemic Health, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Chengjie Zhang
- Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Yushang Zhao
- Experimental and Translational Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
- Beijing Clinical Research Institute, Beijing, 100050, China
| | - Huan Wang
- Experimental and Translational Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
- Beijing Clinical Research Institute, Beijing, 100050, China
| | - Huixuan Ma
- Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Jinmei Sun
- Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Song Zhang
- Experimental and Translational Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
- Beijing Clinical Research Institute, Beijing, 100050, China
| | - Jingyi Yao
- Experimental and Translational Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
- Beijing Clinical Research Institute, Beijing, 100050, China
| | - Dan Xie
- Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China.
| | - Yongbo Zhang
- Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China.
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Yao Y, Liu F, Gu Z, Wang J, Xu L, Yu Y, Cai J, Ren R. Emerging diagnostic markers and therapeutic targets in post-stroke hemorrhagic transformation and brain edema. Front Mol Neurosci 2023; 16:1286351. [PMID: 38178909 PMCID: PMC10764516 DOI: 10.3389/fnmol.2023.1286351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 11/13/2023] [Indexed: 01/06/2024] Open
Abstract
Stroke is a devastating condition that can lead to significant morbidity and mortality. The aftermath of a stroke, particularly hemorrhagic transformation (HT) and brain edema, can significantly impact the prognosis of patients. Early detection and effective management of these complications are crucial for improving outcomes in stroke patients. This review highlights the emerging diagnostic markers and therapeutic targets including claudin, occludin, zonula occluden, s100β, albumin, MMP-9, MMP-2, MMP-12, IL-1β, TNF-α, IL-6, IFN-γ, TGF-β, IL-10, IL-4, IL-13, MCP-1/CCL2, CXCL2, CXCL8, CXCL12, CCL5, CX3CL1, ICAM-1, VCAM-1, P-selectin, E-selectin, PECAM-1/CD31, JAMs, HMGB1, vWF, VEGF, ROS, NAC, and AQP4. The clinical significance and implications of these biomarkers were also discussed.
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Affiliation(s)
- Ying Yao
- Department of Neuroscience Intensive Care Unit, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Fei Liu
- Department of Neuroscience Intensive Care Unit, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Zhaowen Gu
- Department of Neurosurgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Jingyu Wang
- Department of Neurosurgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Lintao Xu
- Department of Neurosurgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Yue Yu
- Department of Neuroscience Intensive Care Unit, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Jing Cai
- Department of Neuroscience Intensive Care Unit, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Reng Ren
- Department of Neuroscience Intensive Care Unit, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
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