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Jiang R, Li L, Wang B, Liu L, Liu L, Xian X, Li W. Ceftriaxone Modulates Ubiquitination of α-Amino-3-Hydroxy-5-Methyl-4-Isoxazole Propionic Acid Receptors to Improve Long-Term Potentiation Impairment Induced by Exogenous β-Amyloid in a Glutamate Transporter-1 Dependent Manner. Mol Neurobiol 2024:10.1007/s12035-024-04037-3. [PMID: 38374316 DOI: 10.1007/s12035-024-04037-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 02/09/2024] [Indexed: 02/21/2024]
Abstract
Α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptors (AMPARs) are crucial for properties of synaptic plasticity, such as long-term potentiation (LTP). LTP impairment can occur early in the onset of Alzheimer's disease (AD). The downregulation or decreased abundance of AMPAR expression in the postsynaptic membrane is closely associated with LTP impairment. Ceftriaxone (Cef) can improve LTP impairment in the early stages of AD in a mouse model. The purpose of this study was to explore the mechanism underlying this process from the aspects of AMPAR expression and ubiquitination degree. In this study, we found that β-amyloid (Aβ) treatment induced hippocampal LTP impairment and AMPAR downregulation and ubiquitination. Cef pretreatment ameliorated Aβ-induced hippocampal LTP impairment, reduced AMPAR ubiquitination, and increased AMPAR expression, especially in the plasma membrane, in Aβ-treated mice. Administration of USP46 siRNA and DHK (a specific blocker of glutamate transporter-1) significantly inhibited the above effects of Cef, suggesting a role for anti-AMPAR ubiquitination and upregulation of glutamate transporter-1 (GLT-1) in the Cef-induced improvements mentioned above. The above findings demonstrate that pretreatment with Cef effectively mitigated Aβ-induced impairment of hippocampal LTP by suppressing the ubiquitination process of AMPARs in a GLT-1-dependent manner. These results provide novel insights into the underlying mechanisms elucidating the anti-AD by Cef.
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Affiliation(s)
- Rui Jiang
- Hebei Key Laboratory of Critical Disease Mechanism and Intervention, Department of Pathophysiology, Neuroscience Research Center, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, People's Republic of China
- School of Nursing, Hebei Medical University, 309 Jianhua South Street, Shijiazhuang, 050000, People's Republic of China
| | - Li Li
- Central Laboratory, The Second Hospital of Hebei Medical University, 215 Heping West Road, Shijiazhuang, 050000, People's Republic of China
| | - Bu Wang
- Department of Emergency Critical Care Medicine, The Second Hospital of Hebei Medical University, 215 Heping West Road, Shijiazhuang, 050000, People's Republic of China
| | - Lizhe Liu
- Hebei Key Laboratory of Critical Disease Mechanism and Intervention, Department of Pathophysiology, Neuroscience Research Center, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, People's Republic of China
| | - Lirong Liu
- Hebei Key Laboratory of Critical Disease Mechanism and Intervention, Department of Pathophysiology, Neuroscience Research Center, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, People's Republic of China
| | - Xiaohui Xian
- Hebei Key Laboratory of Critical Disease Mechanism and Intervention, Department of Pathophysiology, Neuroscience Research Center, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, People's Republic of China.
| | - Wenbin Li
- Hebei Key Laboratory of Critical Disease Mechanism and Intervention, Department of Pathophysiology, Neuroscience Research Center, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, People's Republic of China.
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Li S, Tian Z, Xian X, Yan C, Li Q, Li N, Xu X, Hou X, Zhang X, Yang Y, Xue S, Ma S, Cui S, Sun L, Yao X. Catalpol rescues cognitive deficits by attenuating amyloid β plaques and neuroinflammation. Biomed Pharmacother 2023; 165:115026. [PMID: 37336148 DOI: 10.1016/j.biopha.2023.115026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 06/04/2023] [Accepted: 06/14/2023] [Indexed: 06/21/2023] Open
Abstract
This study sought to investigate the anti-amyloid β (Aβ) and anti-neuroinflammatory effects of catalpol in an Alzheimer's disease (AD) mouse model. METHODS The effects of catalpol on Aβ formation were investigated by thioflavin T assay. The effect of catalpol on generating inflammatory cytokines from microglial cells and the cytotoxicity of microglial cells on HT22 hippocampal cells were assessed by real-time quantitative PCR, ELISA, redox reactions, and cell viability. APPswe/PS1ΔE9 mice were treated with catalpol, and their cognitive ability was investigated using the water maze and novel object recognition tests. Immunohistochemistry and immunofluorescence were used to probe for protein markers of microglia and astrocyte, Aβ deposits, and NF-κB pathway activity. Aβ peptides, neuroinflammation, and nitric oxide production were examined using ELISA and redox reactions. RESULTS Catalpol potently inhibited Aβ fibril and oligomer formation. In microglial cells stimulated by Aβ, catalpol alleviated the expression of the proinflammatory cytokines tumor necrosis factor-α (TNF-α), interleukin (IL)-6, and inducible nitric oxide synthase (iNOS) but promoted the expression of the anti-inflammatory cytokine IL-10. Catalpol alleviated the cytotoxic effects of Aβ-exposed microglia on HT22 cells. Treatment with catalpol in APPswe/PS1ΔE9 mice downregulated neuroinflammation production, decreased Aβ deposits in the brains and alleviated cognitive impairment. Catalpol treatment decreased the number of IBA-positive microglia and GFAP-positive astrocytes and their activities of the NF-κB pathway in the hippocampus of APPswe/PS1ΔE9 mice. CONCLUSION The administration of catalpol protected neurons by preventing neuroinflammation and Aβ deposits in an AD mouse model. Therefore, catalpol may be a promising strategy for treating AD.
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Affiliation(s)
- Si Li
- Department of Technology, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Ziqi Tian
- Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, College of Integrative Medicine, Institute of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Xiaohui Xian
- Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China
| | - Cuihuan Yan
- Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, College of Integrative Medicine, Institute of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Qiang Li
- Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, College of Integrative Medicine, Institute of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Nan Li
- Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, College of Integrative Medicine, Institute of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Xiaokang Xu
- College of Acupuncture and Massage, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Xiaojie Hou
- College of Acupuncture and Massage, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Xiaoyun Zhang
- Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, College of Integrative Medicine, Institute of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Yinan Yang
- Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, College of Integrative Medicine, Institute of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Sisi Xue
- Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, College of Integrative Medicine, Institute of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Shengkai Ma
- Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, College of Integrative Medicine, Institute of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Shuanlong Cui
- Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, College of Integrative Medicine, Institute of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Lijun Sun
- Department of Nephrology, The First Hospital of Hebei Medical University, Shijiazhuang, China.
| | - Xiaoguang Yao
- Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, College of Integrative Medicine, Institute of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang, China.
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Wu L, Xian X, Tan Z, Dong F, Xu G, Zhang M, Zhang F. The Role of Iron Metabolism, Lipid Metabolism, and Redox Homeostasis in Alzheimer's Disease: from the Perspective of Ferroptosis. Mol Neurobiol 2023; 60:2832-2850. [PMID: 36735178 DOI: 10.1007/s12035-023-03245-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 01/26/2023] [Indexed: 02/04/2023]
Abstract
In the development of Alzheimer's disease (AD), cell death is common. Novel cell death form-ferroptosis is discovered in recent years. Ferroptosis is an iron-regulated programmed cell death mechanism and has been identified in AD clinical samples. Typical characteristics of ferroptosis involve the specific changes in cell morphology, iron-dependent aggregation of reactive oxygen species (ROS) and lipid peroxides, loss of glutathione (GSH), inactivation of glutathione peroxidase 4 (GPX4), and a unique group of regulatory genes. Increasing evidence demonstrates that ferroptosis may be associated with neurological dysfunction in AD. However, the underlying mechanisms have not been fully elucidated. This article reviews the potential role of ferroptosis in AD, the involvement of ferroptosis in the pathological progression of AD through the mechanisms of iron metabolism, lipid metabolism, and redox homeostasis, as well as a range of potential therapies targeting ferroptosis for AD. Intervention strategies based on ferroptosis are promising for Alzheimer's disease treatment at present, but further researches are still needed.
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Affiliation(s)
- Linyu Wu
- Department of Rehabilitation Medicine, The Third Hospital of Hebei Medical University, No. 139 Ziqiang Road, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Xiaohui Xian
- Department of Pathophysiology, Hebei Medical University, No. 361 East Zhongshan Road, Shijiazhuang, 050051, Hebei, People's Republic of China
- Hebei Key Laboratory of Critical Disease Mechanism and intervention, Shijiazhuang, 050051, People's Republic of China
| | - Zixuan Tan
- Department of Rehabilitation Medicine, The Third Hospital of Hebei Medical University, No. 139 Ziqiang Road, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Fang Dong
- Department of Clinical Laboratory Medicine, The Third Hospital of Hebei Medical University, Shijiazhuang, 050051, People's Republic of China
| | - Guangyu Xu
- Department of Rehabilitation Medicine, The Third Hospital of Hebei Medical University, No. 139 Ziqiang Road, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Min Zhang
- Department of Pathophysiology, Hebei Medical University, No. 361 East Zhongshan Road, Shijiazhuang, 050051, Hebei, People's Republic of China.
- Hebei Key Laboratory of Critical Disease Mechanism and intervention, Shijiazhuang, 050051, People's Republic of China.
| | - Feng Zhang
- Department of Rehabilitation Medicine, The Third Hospital of Hebei Medical University, No. 139 Ziqiang Road, Shijiazhuang, 050051, Hebei, People's Republic of China.
- Hebei Key Laboratory of Critical Disease Mechanism and intervention, Shijiazhuang, 050051, People's Republic of China.
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Gao Y, Duan X, Li W, Zhang X, Xian X, Zhu Y, Wang H. Elevated Homocysteine Levels and Hypertension Relate to Cognitive Impairment via Increased White Matter Hyperintensity Volume. J Alzheimers Dis 2023; 96:1739-1746. [PMID: 38007660 DOI: 10.3233/jad-230687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2023]
Abstract
BACKGROUND Recent studies have identified a relationship between elevated homocysteine levels and hypertension (HTN) with Alzheimer's disease (AD), but its pathogenesis remains unclear. OBJECTIVE To evaluate elevated homocysteine levels and HTN as risk factors for cognitive impairment (CI) and determine their relationship with white matter hyperintensity (WMH) volume. METHODS A total of 521 subjects were selected from the Alzheimer's Disease Neuroimaging Initiative (ADNI) database and divided into two groups according to the diagnostic criteria of the ADNI database. The CI group included 370 subjects, consisting of 122 with AD and 248 with mild CI, while the cognitively normal (CN) group contained 151 subjects. The history of HTN, homocysteine levels, WMH volume and Mini-Mental State Examination (MMSE) scores were analyzed. RESULTS The study found that patients with CI had higher homocysteine levels than those with CN. Additionally, WMH volume was significantly correlated with homocysteine levels in CI patients, and MMSE scores decreased as WMH volume increased. Further analysis revealed that CI patients with HTN had significantly higher homocysteine levels than those without HTN. Furthermore, the correlation between WMH volume and homocysteine levels was significant only in CI patients with HTN and not in those without HTN. In CN patients, there was no correlation between WMH volume and homocysteine levels in either the HTN or non-HTN groups, and no difference was observed in homocysteine levels. CONCLUSIONS It is indicated that elevated homocysteine levels in conjunction with HTN are associated with the increased volume of WMHs and CI.
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Affiliation(s)
- Yuan Gao
- Department of Neurology, The First Hospital of Hebei Medical University, Brain Aging and Cognitive Neuroscience Laboratory of Hebei Province, Shijiazhuang, Hebei, China
- Department of Cell Biology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Xiaocui Duan
- Department of Cell Biology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Wanlin Li
- Department of Neurology, The First Hospital of Hebei Medical University, Brain Aging and Cognitive Neuroscience Laboratory of Hebei Province, Shijiazhuang, Hebei, China
| | - Xiaoyu Zhang
- Department of Neurology, The First Hospital of Hebei Medical University, Brain Aging and Cognitive Neuroscience Laboratory of Hebei Province, Shijiazhuang, Hebei, China
| | - Xiaohui Xian
- Department of Pathophysiology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Yuan Zhu
- Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine Geriatrics Department, Shanghai, China
| | - Hualong Wang
- Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine Geriatrics Department, Shanghai, China
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Zhang Q, Li Y, Wang X, Yin C, Zhou Q, Guo J, Zhao J, Xian X, Hou Z, Wang Q. Sevoflurane exposure causes neuronal apoptosis and cognitive dysfunction by inducing ER stress via activation of the inositol 1, 4, 5-trisphosphate receptor. Front Aging Neurosci 2022; 14:990679. [DOI: 10.3389/fnagi.2022.990679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Accepted: 10/07/2022] [Indexed: 11/13/2022] Open
Abstract
The role of the inositol 1, 4, 5-trisphosphate receptor (IP3R) in hippocampal neuronal apoptosis and cognitive dysfunction induced by sevoflurane is currently unclear. Therefore, in this study, we investigated the role of the IP3R in endoplasmic reticulum (ER) stress and hippocampal neuronal apoptosis induced by sevoflurane in aged rats and isolated hippocampal neurons using both in vivo and in vitro experiments, including bioinformatics, functional enrichment analysis, gene set enrichment analysis, hematoxylin, and eosin staining, TUNEL assay, flow cytometry, western blot analysis and transmission electron microscopy. Furthermore, behavioral assessment was performed with the Morris water maze test. We identified 232 differentially expressed genes induced by sevoflurane exposure, including 126 upregulated genes and 106 downregulated genes. Sevoflurane exposure caused cognitive impairment and neuronal injury, and increased p-IP3R levels and ER stress. An IP3R inhibitor, 2-APB, suppressed these changes, while an IP3R agonist, FK-506, aggravated these changes. Together, these findings suggest that sevoflurane exposure causes marked cognitive dysfunction in aged rats and neuronal injury in isolated hippocampal neurons by activating the IP3R and inducing cytoplasmic calcium overload, thereby resulting in ER stress and hippocampal neuronal apoptosis.GRAPHICAL ABSTRACT
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Gao Z, Zhang D, Yan X, Shi H, Xian X. Effects of ω-3 Polyunsaturated Fatty Acids on Coronary Atherosclerosis and Inflammation: A Systematic Review and Meta-Analysis. Front Cardiovasc Med 2022; 9:904250. [PMID: 35795375 PMCID: PMC9251200 DOI: 10.3389/fcvm.2022.904250] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 05/11/2022] [Indexed: 11/13/2022] Open
Abstract
Background and PurposeMultiple guidelines suggest the ω-3 polyunsaturated fatty acids (ω-3 PUFAs) help to prevent major vascular events of coronary heart disease (CHD), but the data on large trials of ω-3 fatty acids are controversial. We reviewed the available evidence to determine the effect of ω-3 PUFAs on coronary atherosclerosis.Materials and MethodsLiterature were from online databases. Randomized controlled trials (RCTs) or observational studies were acceptable. Quantitative data synthesis was conducted using R version 4.1.2. Each outcome was calculated using standardized mean difference (SMD) in a random-effect model. Sensitivity analysis was conducted for each outcome. A total of 21 RCTs and 1 observational study with 2,277 participants were included.ResultsMeta-analysis indicated a benefit of ω-3 PUFAs on coronary atherosclerosis, namely, (1) ω-3 PUFAs can reduce the atherosclerotic plaque volume (SMD −0.18; 95% CI −0.31 to −0.05); (2) ω-3 PUFAs can help reduce the loss of the diameter of the narrowest segments of coronary arteries in patients with CHD (SMD 0.29; 95% CI, 0.05–0.53); (3) ω-3 PUFAs do not have significant effect on volume of lipid plaque in coronary arteries (SMD −1.18; 95% CI −2.95 to 0.58), volume of fiber plaque (SMD 0.26; 95% CI −0.81 to 1.33), and calcified plaque (SMD 0.17; 95% CI −0.55 to 0.89); and (4) ω-3 PUFAs had no significant effect on endothelial inflammatory factors in peripheral blood.ConclusionsWe confirmed that ω-3 PUFAs benefit patients with CHD by reducing the progression of coronary atherosclerosis. We indicated that the benefits were not caused by reducing endothelial inflammations of coronary arteries.Systematic Review Registrationhttps://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42021285139, identifier: CRD42021285139.
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Affiliation(s)
- Zheng Gao
- Department of Internal Medicine, The Second Affiliated Hospital of Hebei Medical University, Shijiazhuang, China
| | - Dewen Zhang
- Department of Pathophysiology, College of Basic Medicine, Hebei Medical University, Shijiazhuang, China
| | - Xiaocan Yan
- Department of Internal Medicine, The Second Affiliated Hospital of Hebei Medical University, Shijiazhuang, China
| | - Hekai Shi
- Department of Internal Medicine, The Second Affiliated Hospital of Hebei Medical University, Shijiazhuang, China
| | - Xiaohui Xian
- Department of Pathophysiology, College of Basic Medicine, Hebei Medical University, Shijiazhuang, China
- Department of Pathophysiology, Hebei Key Laboratory of Critical Disease Mechanism and Intervention, Hebei Medical University, Shijiazhuang, China
- *Correspondence: Xiaohui Xian
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Zhang Q, Li Y, Yin C, Gao M, Yu J, Guo J, Xian X, Hou Z, Wang Q. IL-17A deletion reduces sevoflurane-induced neurocognitive impairment in neonatal mice by inhibiting NF-κB signaling pathway. Bioengineered 2022; 13:14562-14577. [PMID: 35758051 PMCID: PMC9342424 DOI: 10.1080/21655979.2022.2090608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
We investigated the role of IL-17A in sevoflurane-inducedneurocognitive impairment in neonatal mice. Seventy-two wild-type (WT) and 42 IL-17A knockout (KO) neonatal mice were randomly divided into WT (n = 36), IL-17A−/− (n = 6), sevoflurane (Sev, n = 36), and IL-17A−/− + sevoflurane (IL-17A−/− + Sev, n = 36) groups. The latter two groups were given 3% sevoflurane for 2 h per day on postnatal days (P) 6–8. Behavioral experiments were performed on P30–36. At P37, RNA sequencing and qRT-PCR of the hippocampus was performed, neurons were detected by Nissl staining, and neuropathological changes were evaluated by HE staining. NF-κB pathway-related proteins were evaluated by western blot and immunofluorescence analyses, IL-1β and IL-6 levels were assessed by ELISA. RNA sequencing identified 131 differentially expressed genes, highlighting several enriched biological processes (chemokine activity, immune response, extracellular region, extracellular space, inflammatory response) and signaling pathways (IL-17 signaling pathway, chemokine signaling pathway, cytokine–cytokine receptor interaction, ECM–receptor interaction and influenza A). Repeated sevoflurane exposures induced long-term cognitive impairment in WT mice. The cognitive impairment was comparatively less severe in IL-17A KO mice. In addition, the increased levels of NF-κB p65, iNOS, COX-2, IL-17A, IL-6 and IL-1β, reduced neuronal numbers and neuropathological changes were ameliorated in neonatal mice in the IL-17A−/− + Sev group compared with neonatal mice in Sev group. IL-17A deletion protects against long-term cognitive impairment induced by repeated sevoflurane exposure in neonatal mice. The underlying mechanism may relate to inhibiting NF-κB signaling pathway as well as the reducing neuroinflammation.
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Affiliation(s)
- Qi Zhang
- Department of Anesthesiology, Hebei Children's Hospital Affiliated to Hebei Medical University, Shijiazhuang, Hebei, China.,Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Yanan Li
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Chunping Yin
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Mingyang Gao
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Jiaxu Yu
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Junfei Guo
- Department of Orthopaedics, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, China.,NHC Key Laboratory of Intelligent Orthopaedic, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Xiaohui Xian
- Department of Pathophysiology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Zhiyong Hou
- Department of Orthopaedics, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, China.,NHC Key Laboratory of Intelligent Orthopaedic, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Qiujun Wang
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
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Li S, Zhang L, Lin J, Su A, Liu X, Zhang J, Xian X, Hu Y, Li W, Sun S, Zhang M. LncRNA BIRF Promotes Brain Ischemic Tolerance Induced By Cerebral Ischemic Preconditioning Through Upregulating GLT-1 via Sponging miR-330-5p. Mol Neurobiol 2022; 59:3996-4014. [PMID: 35451738 PMCID: PMC9167204 DOI: 10.1007/s12035-022-02841-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 04/04/2022] [Indexed: 10/24/2022]
Abstract
Long noncoding RNAs (lncRNAs) play an important regulatory role in various diseases. However, the role of lncRNAs in brain ischemic tolerance (BIT) induced by cerebral ischemic preconditioning (CIPC) is still unknown. The lncRNA profile of rat cortical astrocytes pretreated with ischemic preconditioning was analyzed by high-throughput sequencing. The results of Cell-Counting Kit-8 (CCK-8) assay showed that a novel lncRNA, NONRATT009133.2, which we referred to as brain ischemia-related factor (BIRF), was highly correlated with BIT. Through bioinformatics analysis, we predicted that BIRF, miR-330-5p, and GLT-1 (also named Slc1a2) might constitute a ceRNA regulatory network in the induction of BIT. We found that BIRF was upregulated by CIPC, which promoted GLT-1 expression and BIT induction. BIRF could directly bind to miR-330-5p. Furthermore, miR-330-5p directly targeted GLT-1, and miR-330-5p inhibited both GLT-1 expression and BIT induction in vitro and in vivo. Moreover, BIRF acts as a molecular sponge to competitively bind to miR-330-5p with GLT-1 mRNA, while the miR-330-5p inhibitor reversed all the effects of BIRF siRNA on GLT-1 expression and neuronal vitality. Taken together, our results demonstrate the important roles of the BIRF/miR-330-5p/GLT-1 axis in the induction of BIT by CIPC. BIRF may be a potentially effective therapeutic strategy against stroke injury.
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Affiliation(s)
- Shichao Li
- Key Laboratory of Critical Disease Mechanism and intervention of Hebei Province, Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China
| | - Lingyan Zhang
- Key Laboratory of Critical Disease Mechanism and intervention of Hebei Province, Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China
| | - Jiajie Lin
- Key Laboratory of Medical Biotechnology of Hebei Province, Hebei Medical University, Department of Biochemistry and Molecular Biology, Cardiovascular Medical Science Center, Shijiazhuang, China
| | - Achou Su
- Key Laboratory of Critical Disease Mechanism and intervention of Hebei Province, Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China
| | - Xiyun Liu
- Key Laboratory of Critical Disease Mechanism and intervention of Hebei Province, Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China
| | - Jingge Zhang
- Key Laboratory of Critical Disease Mechanism and intervention of Hebei Province, Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China
| | - Xiaohui Xian
- Key Laboratory of Critical Disease Mechanism and intervention of Hebei Province, Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China
| | - Yuyan Hu
- Key Laboratory of Critical Disease Mechanism and intervention of Hebei Province, Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China
| | - Wenbin Li
- Key Laboratory of Critical Disease Mechanism and intervention of Hebei Province, Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China
| | - Shaoguang Sun
- Key Laboratory of Medical Biotechnology of Hebei Province, Hebei Medical University, Department of Biochemistry and Molecular Biology, Cardiovascular Medical Science Center, Shijiazhuang, China.
| | - Min Zhang
- Key Laboratory of Critical Disease Mechanism and intervention of Hebei Province, Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China.
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Lin X, Xu X, Yang Y, Wu J, Xian X, Chen X. Preoperative evaluation of persistent cloaca using contrast-enhanced ultrasound in an infant. Med Ultrason 2020; 22:250-252. [PMID: 32190857 DOI: 10.11152/mu-2039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Persistent cloaca (PC) is the most intricate anorectal malformation. Contrast-enhanced ultrasound (CEUS) is safe for hepatic, renal, splenic, vascular, and intracavitary assessment in children, but it is little applied for cloacal malformation. Our results demonstrate that CEUS can not only display the uterine, vagina, bladder, urethra, rectum, and rectovaginal fistula, but also measure the length of the common channel, bladder neck to the common channel, and distal urethra to the perineum. To our knowledge this may be the first report of preoperative evaluation by CEUS in an infant with PC.
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Affiliation(s)
- Xueyun Lin
- Department of Ultrasound, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.
| | - Xiaohong Xu
- Department of Ultrasound, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.
| | - Yuping Yang
- Department of Ultrasound, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.
| | - Jiang Wu
- Department of Pediatric Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.
| | - Xiaohui Xian
- Department of Pediatric Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.
| | - Xiaodong Chen
- Department of Radiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.
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10
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Yao X, Xian X, Fang M, Fan S, Li W. Loss of miR-369 Promotes Tau Phosphorylation by Targeting the Fyn and Serine/Threonine-Protein Kinase 2 Signaling Pathways in Alzheimer's Disease Mice. Front Aging Neurosci 2020; 11:365. [PMID: 32082134 PMCID: PMC7004974 DOI: 10.3389/fnagi.2019.00365] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 12/13/2019] [Indexed: 12/19/2022] Open
Abstract
Introduction Alzheimer’s disease (AD) is a progressive neurodegenerative dementia with the key pathological hallmarks amyloid-beta deposition and neurofibrillary tangles composed of hyperphosphorylated tau. microRNAs (miRNAs) are small non-coding RNAs that contribute to the pathogenesis of AD. In this study, we investigated the effect of the loss of miR-369 on the phosphorylation of tau protein and the activation of the kinases Fyn and serine/threonine-protein kinase 2 (SRPK2) as the upstream molecules facilitating tau phosphorylation in miR-369 knockout 3xTg-AD mice. Methods We generated miR-369 knockout 3xTg-AD mice and investigated their cognitive behaviors by maze tests. Real-time qPCR, western blot, and immunohistochemistry were performed to evaluate the expression of the miR-369 gene, phosphorylation of tau protein, and activation of Fyn and SRPK2. Luciferase reporter assays were applied to confirm the predicted targets of miR-369. Results Knocking out miR-369 in 3xTg AD mice aggravated cognitive impairment, promoted hyperphosphorylation of tau, and upregulated Fyn and SRPK2. Restoring miR-369 reversed the hyperphosphorylation of tau and downregulated Fyn and SRPK2. Additionally, miR-369 was shown to target the 3′UTRs of Fyn and SRPK2 to regulate their expression levels. Conclusion Loss of miR-369 promotes tau phosphorylation by targeting the Fyn and SRPK2 signaling pathways in AD mice, and supplementation with miR-369 might be a valuable option for AD therapeutic studies.
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Affiliation(s)
- Xiaoguang Yao
- Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China.,Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, Hebei University of Chinese Medicine, Shijiazhuang, China.,Department of Surgery, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Xiaohui Xian
- Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China.,Neuroscience Research Center of Hebei Medical University, Shijiazhuang, China
| | - Mingxing Fang
- Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China.,Department of Intensive Care Medicine, Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Shujuan Fan
- Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China.,Neuroscience Research Center of Hebei Medical University, Shijiazhuang, China
| | - Wenbin Li
- Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China.,Neuroscience Research Center of Hebei Medical University, Shijiazhuang, China
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11
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Fang M, Fan S, Yao X, Liu N, Gao J, Wang Z, Xu T, Xian X, Li W. Transfection of Sox11 plasmid alleviates ventilator-induced lung injury via Sox11 and FAK. Biochem Biophys Res Commun 2019; 512:182-188. [PMID: 30879763 DOI: 10.1016/j.bbrc.2019.03.041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 03/08/2019] [Indexed: 12/15/2022]
Abstract
Background Ventilator-induced lung injury (VILI) is the most common complication in the mechanical ventilation in clinic. The pathogenesis of VILI has not been well understood. The SRY related High Mobility Group box group-F family member 11(Sox11) is a protein associated with lung development. The focal adhesion kinase(FAK) is a cytoplasmic tyrosine kinase and is regulated by Sox11. The present study, therefore, was undertaken to explore the potential role of Sox11 and FAK in VILI. Methods High volume mechanical ventilation(HMV) was used to establish mouse VILI model under anesthesia. The lung injury was evaluated by analyzing the lung weight, bronchoalveolar lavage fluid, histopathological changes and apoptosis of the lung. The Sox11 and FAK expressions in the lung were investigated by real-time qPCR, western blot and immunohistochemistry analysis. Results HMV induced VILI simultaneously companied with decreased expressions of Sox11 and FAK in alveolar epithelial and interstitial cells either in gene and protein levels. Transfection of Sox11 plasmid significantly upregulated expressions of Sox11 and FAK in gene and protein levels in the lung and particularly effectively alleviated VILI. Furthermore, FAK antagonism by PF562271(FAK antagonist) blocked the alleviating effect of Sox11 plasmid transfection on the VILI. Conclusion The dysregulation in the Sox11 and FAK after HMV play an important role in the pathogenesis of VILI, and facilitating the activity of Sox11and FAK might be an effective target and potential option in the prevention and treatment of VILI in clinic.
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Affiliation(s)
- Mingxing Fang
- Department of Pathophysiology, Neuroscience Research Center, Hebei Medical University, Shijiazhuang, China; Department of Intensive Care Medicine, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Shujuan Fan
- Department of Pathophysiology, Neuroscience Research Center, Hebei Medical University, Shijiazhuang, China
| | - Xiaoguang Yao
- Department of Pathophysiology, Neuroscience Research Center, Hebei Medical University, Shijiazhuang, China; College of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Na Liu
- Department of Emergency, The Forth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Junxia Gao
- Department of Pathophysiology, Neuroscience Research Center, Hebei Medical University, Shijiazhuang, China
| | - Zhiyong Wang
- Department of Intensive Care Medicine, The Third Hospital of Hebei Medical University, Shijiazhuang, China.
| | - Tieling Xu
- Department of Emergency, Hebei General Hospital, Shijiazhuang, China
| | - Xiaohui Xian
- Department of Pathophysiology, Neuroscience Research Center, Hebei Medical University, Shijiazhuang, China
| | - Wenbin Li
- Department of Pathophysiology, Neuroscience Research Center, Hebei Medical University, Shijiazhuang, China.
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12
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Sun XC, Li WB, Li QJ, Zhang M, Xian XH, Li SQ, Qi J, Liu HR. [P38 MAPK antisense oligodeoxynucleotide inhibited the brain ischemic tolerance induced by limb ischemic preconditioning]. Zhongguo Ying Yong Sheng Li Xue Za Zhi 2010; 26:129-132. [PMID: 20684258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
OBJECTIVE To better assess the role of p38 MAPK, this project was designed to investigate whether intraventricular injection of antisense oligodeoxynucleotide (As-ODN) directed against the p38 MAPK of pyramidal neurons in hippocampus could affect the brain ischemic tolerance induced by limb ischemic preconditioning (LIP). METHODS The rat 4-vessel occlusion global cerebral ischemic model was used. Forty-eight male Wistar rats with permanently occlusion of the bilateral vertebral arteries were divided into 8 groups (n=6): sham, LIP, brain ischemic insult, LIP + brain ischemic insult, distilled water + LIP + brain ischemic insult, p38 MAPK As-ODN and p38 MAPK As-ODN + LIP + brain ischemic insult (two doses of 5 nmol/5 microl and 10 nmol/5 microl were used) groups. Thionin staining was used for observing histological changes of the hippocampus. RESULTS No significant delayed neuronal death (DND) was detected in the CA1 hippocampus of the rats that underwent sham and LIP operation. Brain ischemic insult for 8 min induced obvious DND as represented with the increase in histological grade (HG) and decrease in neuronal density (ND) significantly compared with sham and LIP groups. LIP protected the CA1 hippocampal pyramidal neurons against DND induced by global brain ischemic insult, suggesting the occurrence of brain ischemic tolerance. However, pretreatment with p38 MAPK As-ODN effectively blocked the ischemic tolerance induced by LIP in a dose dependent manner. CONCLUSION It could be concluded that p38 MAPK plays an important role in the brain ischemic tolerance induced by LIP.
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Affiliation(s)
- Xiao-cai Sun
- Department of Pathophysiology, Hebei Medical University, Shijiazhuang 050017, China
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13
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Hu Y, Li W, Lu L, Cai J, Xian X, Zhang M, Li Q, Li L. An anti-nociceptive role for ceftriaxone in chronic neuropathic pain in rats. Pain 2009; 148:284-301. [PMID: 20022427 DOI: 10.1016/j.pain.2009.11.014] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Revised: 10/01/2009] [Accepted: 11/13/2009] [Indexed: 12/01/2022]
Abstract
Glial glutamate transporter-1 (GLT-1) plays an essential role in the maintenance of glutamate homeostasis and is involved in the development and maintenance of pathological pain. The present study was undertaken (1) to observe the anti-nociceptive effects of ceftriaxone (Cef) in a chronic neuropathic pain model induced by chronic constrictive nerve injury (CCI) of the sciatic nerve and (2) to identify the role of spinal GLT-1 in the process. CCI induced significant thermal hyperalgesia and mechanical allodynia, which began from postoperative day 3 and lasted to day 21. This long-term hyperalgesia was accompanied by significant down-regulation of GLT-1 expression in the L4-L6 segments of the spinal dorsal horn, as revealed by immunohistochemistry and Western blot. Intraperitoneal preventive and therapeutic administration of Cef effectively prevented or reversed, respectively, the development of thermal hyperalgesia, mechanical allodynia, and GLT-1 down-regulation in the spinal dorsal horn. To further determine whether the above anti-nociceptive effects of Cef are a result of the up-regulation of spinal GLT-1 expression and its function, we further observed the effects of intrathecal administration of Cef in the same model. It was found that intrathecal administration of Cef led to the specific up-regulation of GLT-1 expression and glutamate uptake ((3)H-glutamate) in the spinal dorsal horn, and similar anti-nociceptive effects to those of intraperitoneal administration of Cef. The above effects of intrathecal Cef administration were all significantly inhibited by intrathecal administration of GLT-1 antisense oligodeoxynucleotides (As-ODNs). These results indicate that Cef plays an anti-nociceptive role by up-regulating spinal GLT-1 expression and its function.
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Affiliation(s)
- Yuyan Hu
- Department of Pathophysiology, Institute of Basic Medicine, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang 050017, PR China Aging and Cognition Neuroscience Laboratory of Hebei Province, 89 Donggang Road, Shijiazhuang 050031, PR China Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang 050017, PR China
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Yun XJ, Hu YY, Xian XH, Li SQ, Sun XC, Zhang M, Li QJ, Li WB. [Intracerebroventricular administration of adenosine A1 receptor antisense oligodeoxynucleotide inhibites the neuroprotective effect of the cerebral ischemic preconditioning in rats]. Zhongguo Ying Yong Sheng Li Xue Za Zhi 2008; 24:430-433. [PMID: 21158144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM To further explore the role of adenosine A1 receptor in the neuroprotective effect of cerebral ischemic preconditioning, the present study was undertaken to observe the effect of inhibiting expression of adenosine Al receptor with adenosine A1 receptor antisense oligodeoxynucleotide (ARA1 As-ODN) on the neuroprotective effect of cerebral ischemic preconditioning against delayed neuronal death (DND) normally induced by lethal brain ischemia. METHOD The rat 4-vessel occlusion global cerebral ischemic model was used. Forty-eight male Wistar rats with permanent occlusion of the bilateral vertebral arteries were divided into 8 groups: Sham, CIP, brain ischemic insult, CIP + brain ischemic insult, Distilled water + CIP + brain ischemic insult, ARA1 As-ODN, ARA1 As-ODN +CIP, ARA1 As-ODN+ CIP + brain ischemic insult(two doses of 10 nmol/5 microl and 20 nmol/5 microl were used) groups. ARA1 As-ODN was dissolved in distilled water and injected into the right lateral cerebral ventricle. To illustrate the profile of DND, histological grade (HG) and neuronal density (ND) in the CA1 region of the hippocampus were examined 7 d after the sham operation or the last time of ischemia under thionin staining. RESULTS The HG and ND in CIP group were similar to those in sham group. Brain ischemic insult induced obvious DND as represented with the increase in HG and decrease in ND significantly (P < 0.05 vs. sham and CIP groups). In CIP + ischemic insult group,no obvious DND was observed,which indicated that CIP protected pyramidal neurons against the ischemic insult.While the administration of ARA1 As-ODN in ARA1 As-ODN + CIP + brain ischemic insult group caused obvious increase in HG and decrease in ND compared with CIP + brain ischemic insult group (P < 0.05) in a dose dependent manner,which indicated that the neuroprotective effect of CIP against DND of hippocampal pyramidal neurons normally induced by ischemic insult was inhibited by the administration of ARA1 As-ODN. CONCLUSION The results further demonstrate the association of up-regulation of adenosine A1 receptors with the induction of CIP-mediated BIT.
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Affiliation(s)
- Xiao-jing Yun
- Department of Pathophysiology, Institute of Basic Medicine, Hebei Medical University, Shijiazhuang 050017, China
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15
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Zhang JY, Ding CH, Ling YL, Dong CF, Tan JQ, Xian XH. [Inhibitory effect of melatonin on the expression of nuclear factor-kappaB during acute lung injury in rats]. Zhongguo Wei Zhong Bing Ji Jiu Yi Xue 2008; 20:604-606. [PMID: 18926072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
OBJECTIVE To investigate the protective effect of melatonin (MT) on lung tissue during acute lung injury (ALI) in rats and its possible mechanism. METHODS Ninety-six Sprague-Dawley (SD) rats were randomly divided into four groups: control group, lipopolysaccharide (LPS) group, dexamethasone (DEX) and MT treatment group, with 24 rats in each group. Rat model of ALI was established by instilling LPS intratracheally, and DEX and MT were injected intraperitoneally. All rats in each group were sacrificed at 3, 6 and 12 hours after intratracheal instillation of LPS, and lung tissue samples were harvested. Myeloperoxidase (MPO) activity, superoxide dismutase (SOD) activity and malondialdehyde (MDA) contents in lung tissue samples were detected in each group. In addition, the expression of nuclear factor-kappaB (NF-kappaB) was assessed with immunohistochemistry staining in lung tissues. RESULTS Compared with control group, SOD activity in LPS group decreased at different time points significantly (P<0.05 or P<0.01), but MPO activity, MDA content and the expression of NF-kappaB increased obviously (P<0.05 or P<0.01); the administration of MT and DEX could mitigate above values significantly (P<0.05 or P<0.01). The changes in above each indexes were most obvious at 6 hours, either reaching the peak or the trough, respectively. CONCLUSION MT possesses protective effect on lung tissues during ALI through scavenging free radicals and inhibiting the activation of NF-kappaB.
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Affiliation(s)
- Jun-yi Zhang
- Department of pathophysiology, The School of Basic Medical Science, Hebei Medical University, Shijiazhuang 050017, Hebei, China
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Huang XL, Zhou XH, Wei P, Xian XH, Ling YL. [The role of hydrogen sulfide in acute lung injury during endotoxic shock and its relationship with nitric oxide and carbon monoxide]. Zhonghua Yi Xue Za Zhi 2008; 88:2240-2245. [PMID: 19087669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
OBJECTIVE To explore the role of hydrogen sulfide (H2S) in acute lung injury (ALI) during endotoxic shock (ES) and its relationship with nitric oxide (NO) and carbon monoxide (CO). METHODS Sixty-four adult male SD rats were randomly divided into 4 equal groups: control group injected with normal saline via the caudal vein, lipopolysaccharide (LPS)-treated group injected with LPS to establish ES model, LPS + NaHS group injected with LPS and sodium hydrosulfide (NaHS, an exogenous H2S donor], and LPS + PPG group injected with LPS and polypropylene glycol (PPG, a H2S synthase inhibitor). The mean artery pressure (MAP) was measured via a polyethylene catheter in the right common carotid artery for 6 h. Then the rats were sacrificed with their lungs taken out to determine the lung water content, lung tissue malonyldialdehyde (MDA), NO, and CO contents, as well as lung tissue cystathionine-gamma-lyase (CSE), myeloperoxidase (MPO), nitric oxide synthase (NOS), and heme oxygenase (HO) activities. The H2S content in blood plasma was detected also. Morphological changes of the lung tissues were observed under light microscope and the index of quantitative assessment (IQA) of lung injury was calculated. Immunohistochemistry and Western blotting were used to detect the lung tissue inducible NOS (iNOS) and HO-1 protein expression. RESULTS Compared with the control group, the MAP of the LPS group was significantly lower, the pathological changes in lung tissue was more obvious, and the IQA, lung water content, lung MDA content, lung MPO and CSE activities as well as plasma H2S content were all significantly higher (P < 0.05 or P < 0.01). Compared to the LPS group, the plasma H2S and lung CSE activity of the LPS + NaHS group were higher, the lung injury was more severe, and the MAP was lower. And compared to the LPS group, the MAP of the LPS + PPG group was higher, and the lung injury was milder (both P < 0.05). The eNOS activity in the lung tissue of the LPS group was (5.26 +/- 0.25) Uxmg(-1)xprot(-1), significantly lower than that of the control group [(6.45 +/- 0.42) Uxmg(-1)xprot(-1)]; and the iNOS activity and NO content of the LPS group were (12.6 +/- 0.6) Uxmg(-1)xprot(-1) and (144 +/- 25) micromol/L respectively, both higher than those of the control group [(10.5 +/- 0.7) Uxmg(-1)xprot(-1) and (68 +/- 5) micromol/L respectively] (P < 0.05 or P < 0.01). Compared with the LPS group, the lung tissue eNOS activity of the LPS + PPG group was significantly higher, and the iNOS activity [(10.2 +/- 0.4) Uxmg(-1)xprot(-1)], iNOS protein expression, and NO content [(74 +/- 5) micromol/L]were all significantly lower (P < 0.05 or P < 0.01). Compared with the LPS group, the lung tissue eNOS activity of the LPS + NaHS group [(4.81 +/- 0.23) Uxmg(-1)xprot(-1)] was significantly lower, and the iNOS activity [(14.6 +/- 0.4) Uxmg(-1)xprot(-1)], iNOS protein expression, and NO content [(217 +/- 18) micromol/L] were significantly higher (P < 0.05 or P < 0.01). The lung tissue HO activity [(173 +/- 31) pkat/g], HO protein expression, and CO content [(3.63 +/- 0.24)%] of the LPS group were all significantly higher than those of the control group [(125 +/- 22) pkat/g, (2.48 +/- 0.33)%, both P < 0.05], and the LPS + PPG group [(88 +/- 17) pkat/g, (2.98 +/- 0.23)%, both P < 0.05]. Compared to the LPS group, the lung tissue HO activity [(263 +/- 37) pkat/g], HO protein expression, and CO content [(4.35 +/- 0.32)%] of the LPS + NaHS group were all significantly higher (all P < 0.05). CONCLUSION The increase of H(2)S generation participates in the lung tissue injury during ES and this event is related to eNOS activity decrease, iNOS activity increase that causes the production of large amount of NO. H2S up-regulates the HO-1/CO system in the lung tissues during ES, which may be the endogenous compensatory response against the injury.
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Affiliation(s)
- Xin-li Huang
- Department of Pathophysiology, Hebei Medical University, Shijiazhuang 050017, China
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