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Chi W, Huang Y, Li P, Wang X, Li J, Meng F. Morphine Induced Neuroprotection in Ischemic Stroke by Activating Autophagy Via mTOR-Independent Activation of the JNK1/2 Pathway. Neurochem Res 2024; 49:2249-2270. [PMID: 38837092 DOI: 10.1007/s11064-024-04181-1] [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: 12/18/2023] [Revised: 04/11/2024] [Accepted: 05/22/2024] [Indexed: 06/06/2024]
Abstract
Morphine (Mor) has exhibited efficacy in safeguarding neurons against ischemic injuries by simulating ischemic/hypoxic preconditioning (I/HPC). Concurrently, autophagy plays a pivotal role in neuronal survival during IPC against ischemic stroke. However, the involvement of autophagy in Mor-induced neuroprotection and the potential mechanisms remain elusive. Our experiments further confirmed the effect of Mor in cellular and animal models of ischemic stroke and explored its potential mechanism. The findings revealed that Mor enhanced cell viability in a dose-dependent manner by augmenting autophagy levels and autophagic flux in neurons subjected to oxygen-glucose deprivation/reoxygenation (OGD/R). Pretreatment of Mor improved neurological outcome and reduced infarct size in mice with middle cerebral artery occlusion/reperfusion (MCAO/R) at 1, 7 and 14 days. Moreover, the use of autophagy inhibitors nullified the protective effects of Mor, leading to reactive oxygen species (ROS) accumulation, increased loss of mitochondrial membrane potential (MMP) and neuronal apoptosis in OGD/R neurons. Results further demonstrated that Mor-induced autophagy activation was regulated by mTOR-independent activation of the c-Jun NH2- terminal kinase (JNK)1/2 Pathway, both in vitro and in vivo. Overall, these findings suggested Mor-induced neuroprotection by activating autophagy, which were regulated by JNK1/2 pathway in ischemic stroke.
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Affiliation(s)
- Wenying Chi
- Department of Anesthesiology, Central Hospital Affiliated to Shandong First Medical University, Shandong, 250013, PR China
| | - Yaru Huang
- Department of Anesthesiology, Central Hospital Affiliated to Shandong First Medical University, Shandong, 250013, PR China
| | - Peilong Li
- Department of Burns and Plastic Surgery, Central Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250013, PR China
| | - Xia Wang
- Department of Anesthesiology, Central Hospital Affiliated to Shandong First Medical University, Shandong, 250013, PR China
- Department of Anesthesiology, Shandong First Medical University, Jinan, Shandong, 250000, PR China
| | - Junfa Li
- Department of Anesthesiology, Central Hospital Affiliated to Shandong First Medical University, Shandong, 250013, PR China.
- Department of Neurobiology, Capital Medical University, Beijing, 100069, PR China.
| | - Fanjun Meng
- Department of Anesthesiology, Central Hospital Affiliated to Shandong First Medical University, Shandong, 250013, PR China.
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Hao Y, Xin M, Feng L, Wang X, Wang X, Ma D, Feng J. Review Cerebral Ischemic Tolerance and Preconditioning: Methods, Mechanisms, Clinical Applications, and Challenges. Front Neurol 2020; 11:812. [PMID: 33071923 PMCID: PMC7530891 DOI: 10.3389/fneur.2020.00812] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 06/29/2020] [Indexed: 12/13/2022] Open
Abstract
Stroke is one of the leading causes of morbidity and mortality worldwide, and it is increasing in prevalence. The limited therapeutic window and potential severe side effects prevent the widespread clinical application of the venous injection of thrombolytic tissue plasminogen activator and thrombectomy, which are regarded as the only approved treatments for acute ischemic stroke. Triggered by various types of mild stressors or stimuli, ischemic preconditioning (IPreC) induces adaptive endogenous tolerance to ischemia/reperfusion (I/R) injury by activating a multitude cascade of biomolecules, for example, proteins, enzymes, receptors, transcription factors, and others, which eventually lead to transcriptional regulation and epigenetic and genomic reprogramming. During the past 30 years, IPreC has been widely studied to confirm its neuroprotection against subsequent I/R injury, mainly including local ischemic preconditioning (LIPreC), remote ischemic preconditioning (RIPreC), and cross preconditioning. Although LIPreC has a strong neuroprotective effect, the clinical application of IPreC for subsequent cerebral ischemia is difficult. There are two main reasons for the above result: Cerebral ischemia is unpredictable, and LIPreC is also capable of inducing unexpected injury with only minor differences to durations or intensity. RIPreC and pharmacological preconditioning, an easy-to-use and non-invasive therapy, can be performed in a variety of clinical settings and appear to be more suitable for the clinical management of ischemic stroke. Hoping to advance our understanding of IPreC, this review mainly focuses on recent advances in IPreC in stroke management, its challenges, and the potential study directions.
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Affiliation(s)
| | | | | | | | | | - Di Ma
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, China
| | - Jiachun Feng
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, China
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Turovsky EA, Babaev AA, Tarabykin VS, Turovskaya MV. Sip1 mutation suppresses the resistance of cerebral cortex neurons to hypoxia through the disturbance of mechanisms of hypoxic preconditioning. BIOCHEMISTRY MOSCOW SUPPLEMENT SERIES A-MEMBRANE AND CELL BIOLOGY 2017. [DOI: 10.1134/s1990747817040109] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Li S, Hafeez A, Noorulla F, Geng X, Shao G, Ren C, Lu G, Zhao H, Ding Y, Ji X. Preconditioning in neuroprotection: From hypoxia to ischemia. Prog Neurobiol 2017; 157:79-91. [PMID: 28110083 DOI: 10.1016/j.pneurobio.2017.01.001] [Citation(s) in RCA: 147] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 01/08/2017] [Accepted: 01/13/2017] [Indexed: 01/05/2023]
Abstract
Sublethal hypoxic or ischemic events can improve the tolerance of tissues, organs, and even organisms from subsequent lethal injury caused by hypoxia or ischemia. This phenomenon has been termed hypoxic or ischemic preconditioning (HPC or IPC) and is well established in the heart and the brain. This review aims to discuss HPC and IPC with respect to their historical development and advancements in our understanding of the neurochemical basis for their neuroprotective role. Through decades of collaborative research and studies of HPC and IPC in other organ systems, our understanding of HPC and IPC-induced neuroprotection has expanded to include: early- (phosphorylation targets, transporter regulation, interfering RNA) and late- (regulation of genes like EPO, VEGF, and iNOS) phase changes, regulators of programmed cell death, members of metabolic pathways, receptor modulators, and many other novel targets. The rapid acceleration in our understanding of HPC and IPC will help facilitate transition into the clinical setting.
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Affiliation(s)
- Sijie Li
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuan Wu Hospital, Capital Medical University, Beijing, China; National Clinical Research Center for Geriatric Disorders, Beijing, China
| | - Adam Hafeez
- Department of Neurological Surgery, Wayne State University School of Medicine, Detroit, MI, USA
| | - Fatima Noorulla
- Department of Neurological Surgery, Wayne State University School of Medicine, Detroit, MI, USA
| | - Xiaokun Geng
- Department of Neurological Surgery, Wayne State University School of Medicine, Detroit, MI, USA; Department of Neurology, Luhe Hospital, Capital Medical University, Beijing, China
| | - Guo Shao
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuan Wu Hospital, Capital Medical University, Beijing, China
| | - Changhong Ren
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuan Wu Hospital, Capital Medical University, Beijing, China
| | - Guowei Lu
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuan Wu Hospital, Capital Medical University, Beijing, China
| | - Heng Zhao
- Department of Neurosurgery, Stanford University, CA, USA
| | - Yuchuan Ding
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuan Wu Hospital, Capital Medical University, Beijing, China; Department of Neurological Surgery, Wayne State University School of Medicine, Detroit, MI, USA
| | - Xunming Ji
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuan Wu Hospital, Capital Medical University, Beijing, China; National Clinical Research Center for Geriatric Disorders, Beijing, China.
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JNK Signaling: Regulation and Functions Based on Complex Protein-Protein Partnerships. Microbiol Mol Biol Rev 2016; 80:793-835. [PMID: 27466283 DOI: 10.1128/mmbr.00043-14] [Citation(s) in RCA: 321] [Impact Index Per Article: 40.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The c-Jun N-terminal kinases (JNKs), as members of the mitogen-activated protein kinase (MAPK) family, mediate eukaryotic cell responses to a wide range of abiotic and biotic stress insults. JNKs also regulate important physiological processes, including neuronal functions, immunological actions, and embryonic development, via their impact on gene expression, cytoskeletal protein dynamics, and cell death/survival pathways. Although the JNK pathway has been under study for >20 years, its complexity is still perplexing, with multiple protein partners of JNKs underlying the diversity of actions. Here we review the current knowledge of JNK structure and isoforms as well as the partnerships of JNKs with a range of intracellular proteins. Many of these proteins are direct substrates of the JNKs. We analyzed almost 100 of these target proteins in detail within a framework of their classification based on their regulation by JNKs. Examples of these JNK substrates include a diverse assortment of nuclear transcription factors (Jun, ATF2, Myc, Elk1), cytoplasmic proteins involved in cytoskeleton regulation (DCX, Tau, WDR62) or vesicular transport (JIP1, JIP3), cell membrane receptors (BMPR2), and mitochondrial proteins (Mcl1, Bim). In addition, because upstream signaling components impact JNK activity, we critically assessed the involvement of signaling scaffolds and the roles of feedback mechanisms in the JNK pathway. Despite a clarification of many regulatory events in JNK-dependent signaling during the past decade, many other structural and mechanistic insights are just beginning to be revealed. These advances open new opportunities to understand the role of JNK signaling in diverse physiological and pathophysiological states.
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Lee EJ, Kim BJ, Jeong JE, Chung HL, Yang EK, Kim WT. Bee Venom Exerts Neuroprotective Effects on Neuronal Cells and Astrocytes under Hypoxic Conditions Through MAPK Signaling Pathways. NEONATAL MEDICINE 2016. [DOI: 10.5385/nm.2016.23.1.43] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Affiliation(s)
- Eun Joo Lee
- Department of Pediatrics, Catholic University of Daegu School of Medicine, Daegu, Korea
| | - Bong Jae Kim
- Department of Pediatrics, Catholic University of Daegu School of Medicine, Daegu, Korea
| | - Ji Eun Jeong
- Department of Pediatrics, Catholic University of Daegu School of Medicine, Daegu, Korea
| | - Hai Lee Chung
- Department of Pediatrics, Catholic University of Daegu School of Medicine, Daegu, Korea
| | - Eun Kyoung Yang
- Department of Physiology, Kyungpook National University School of Medicine, Daegu, Korea
| | - Woo Taek Kim
- Department of Pediatrics, Catholic University of Daegu School of Medicine, Daegu, Korea
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CaMKII Phosphorylation in Primary Somatosensory Cortical Neurons is Involved in the Inhibition of Remifentanil-induced Hyperalgesia by Lidocaine in Male Sprague-Dawley Rats. J Neurosurg Anesthesiol 2016; 28:44-50. [DOI: 10.1097/ana.0000000000000177] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Thushara Vijayakumar N, Sangwan A, Sharma B, Majid A, Rajanikant GK. Cerebral Ischemic Preconditioning: the Road So Far…. Mol Neurobiol 2015; 53:2579-93. [PMID: 26081149 DOI: 10.1007/s12035-015-9278-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 06/02/2015] [Indexed: 12/25/2022]
Abstract
Cerebral preconditioning constitutes the brain's adaptation to lethal ischemia when first exposed to mild doses of a subtoxic stressor. The phenomenon of preconditioning has been largely studied in the heart, and data from in vivo and in vitro models from past 2-3 decades have provided sufficient evidence that similar machinery exists in the brain as well. Since preconditioning results in a transient protective phenotype labeled as ischemic tolerance, it can open many doors in the medical warfare against stroke, a debilitating cerebrovascular disorder that kills or cripples thousands of people worldwide every year. Preconditioning can be induced by a variety of stimuli from hypoxia to pharmacological anesthetics, and each, in turn, induces tolerance by activating a multitude of proteins, enzymes, receptors, transcription factors, and other biomolecules eventually leading to genomic reprogramming. The intracellular signaling pathways and molecular cascades behind preconditioning are extensively being investigated, and several first-rate papers have come out in the last few years centered on the topic of cerebral ischemic tolerance. However, translating the experimental knowledge into the clinical scaffold still evades practicality and faces several challenges. Of the various preconditioning strategies, remote ischemic preconditioning and pharmacological preconditioning appears to be more clinically relevant for the management of ischemic stroke. In this review, we discuss current developments in the field of cerebral preconditioning and then examine the potential of various preconditioning agents to confer neuroprotection in the brain.
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Affiliation(s)
- N Thushara Vijayakumar
- School of Biotechnology, DBT-Centre for Bioinformatics, National Institute of Technology Calicut, Calicut, 673601, India
| | - Amit Sangwan
- School of Biotechnology, DBT-Centre for Bioinformatics, National Institute of Technology Calicut, Calicut, 673601, India
| | - Bhargy Sharma
- School of Biotechnology, DBT-Centre for Bioinformatics, National Institute of Technology Calicut, Calicut, 673601, India
| | - Arshad Majid
- Institute for Translational Neuroscience (SITraN), University of Sheffield, Sheffield, UK
| | - G K Rajanikant
- School of Biotechnology, DBT-Centre for Bioinformatics, National Institute of Technology Calicut, Calicut, 673601, India.
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Brödemann R, Peters B, Höllt V, Becker A. Dynamic aspects of cerebral hypoxic preconditioning measured in an in vitro model. Neurosci Lett 2014; 558:175-9. [PMID: 24240010 DOI: 10.1016/j.neulet.2013.10.069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 10/17/2013] [Accepted: 10/29/2013] [Indexed: 11/25/2022]
Abstract
Preconditioning increases the neurons' resistance to subsequent hypoxia. An in vitro study was conducted to explore kinetic aspects of hypoxic preconditioning. Hippocampal slices were exposed to one single or repeated episodes of oxygen and glucose deprivation (OGD). The interval between OGD episodes varied between 30 min and 180 min. OGD led to a significant reduction in the population spike amplitude. Subsequent episodes of OGD did not result in a further reduction in the population spike amplitude if the interval between the episodes was ca. 60 min, which demonstrated that there were preconditioning effects. In the experiment using an interval of 30 min, population spike amplitude decreased after each OGD episode. The set-up described is useful for detecting damaging effects of OGD as well as preconditioning effects. A time window of ca. 60 min is required to induce protective mechanisms.
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Affiliation(s)
- Rudolf Brödemann
- Otto-von-Guericke University, Faculty of Medicine, Institute of Pharmacology and Toxicology, Leipziger Str. 44, D-39120 Magdeburg, Germany
| | - Brigitte Peters
- Otto-von-Guericke University, Faculty of Medicine, Department of Biometry and Informatics, Leipziger Str. 44, D-39120 Magdeburg, Germany
| | - Volker Höllt
- Otto-von-Guericke University, Faculty of Medicine, Institute of Pharmacology and Toxicology, Leipziger Str. 44, D-39120 Magdeburg, Germany
| | - Axel Becker
- Otto-von-Guericke University, Faculty of Medicine, Institute of Pharmacology and Toxicology, Leipziger Str. 44, D-39120 Magdeburg, Germany.
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Ostrowski RP, Zhang JH. Hyperbaric oxygen for cerebral vasospasm and brain injury following subarachnoid hemorrhage. Transl Stroke Res 2013; 2:316-27. [PMID: 23060945 DOI: 10.1007/s12975-011-0069-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The impact of acute brain injury and delayed neurological deficits due to cerebral vasospasm (CVS) are major determinants of outcomes after subarachnoid hemorrhage (SAH). Although hyperbaric oxygen (HBO) had been used to treat patients with SAH, the supporting evidence and underlying mechanisms have not been systematically reviewed. In the present paper, the overview of studies of HBO for cerebral vasospasm is followed by a discussion of HBO molecular mechanisms involved in the protection against SAH-induced brain injury and even, as hypothesized, in attenuating vascular spasm alone. Faced with the paucity of information as to what degree HBO is capable of antagonizing vasospasm after SAH, the authors postulate that the major beneficial effects of HBO in SAH include a reduction of acute brain injury and combating brain damage caused by CVS. Consequently, authors reviewed the effects of HBO on SAH-induced hypoxic signaling and other mechanisms of neurovascular injury. Moreover, authors hypothesize that HBO administered after SAH may "precondition" the brain against the detrimental sequelae of vasospasm. In conclusion, the existing evidence speaks in favor of administering HBO in both acute and delayed phase after SAH; however, further studies are needed to understand the underlying mechanisms and to establish the optimal regimen of treatment.
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Affiliation(s)
- Robert P Ostrowski
- Department of Physiology and Pharmacology, Loma Linda University, 11041 Campus Street, Loma Linda, CA 92350, USA
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Zhao L, Liu X, Liang J, Han S, Wang Y, Yin Y, Luo Y, Li J. Phosphorylation of p38 MAPK mediates hypoxic preconditioning-induced neuroprotection against cerebral ischemic injury via mitochondria translocation of Bcl-xL in mice. Brain Res 2013; 1503:78-88. [PMID: 23399686 DOI: 10.1016/j.brainres.2013.01.051] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Revised: 01/19/2013] [Accepted: 01/28/2013] [Indexed: 11/17/2022]
Abstract
Hypoxic preconditioning (HPC) initiates intracellular signaling pathway to provide protection, but the role of p38 mitogen-activated protein kinase (p38 MAPK) in HPC-induced neuroprotection against cerebral ischemic injuries is a matter of debate. In this study, we found that HPC could reduce 6h middle cerebral artery occlusion (MCAO)-induced infarct volume, edema ratio and cell apoptosis, as well as enhancing the up-regulated p38 MAPK phosphorylation (P-p38 MAPK) levels in the peri-infarct region of mice after 6h MCAO. However, intracerebroventricular injection of p38 MAPK inhibitor SB203580 abolished this HPC-induced neuroprotection. HPC significantly increased the translocation of anti-apoptotic Bcl-2-related protein Bcl-xL from the cytosol to the mitochondria in the peri-infarct region of MCAO mice. Interestingly, the results of reciprocal immunoprecipitation showed that Bcl-xL and P-p38 MAPK were coimmunoprecipitated reciprocally only in the peri-infarct region of HPC and MCAO treated mice, while Bcl-xL and total p38 (T-p38 MAPK), not P-p38 MAPK, could be coimmunoprecipited by each other in the brain of normal control mice. In addition, we found SB203580 significantly decreased P-p38 MAPK levels, and inhibited HPC-induced mitochondria translocation of Bcl-xL in the brain of HPC and MCAO treated mice. Taken together, our findings suggested that P-p38 MAPK mediates HPC-induced neuroprotection against cerebral ischemic injury via mitochondria translocation of Bcl-xL, which might be a key anti-cell apoptotic mechanism of HPC.
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Affiliation(s)
- Li Zhao
- Department of Neurobiology and Beijing Institute for Brain Disorders, Capital Medical University, Beijing 100069, China
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Liu C, Peng Z, Zhang N, Yu L, Han S, Li D, Li J. Identification of differentially expressed microRNAs and their PKC-isoform specific gene network prediction during hypoxic pre-conditioning and focal cerebral ischemia of mice. J Neurochem 2012; 120:830-41. [DOI: 10.1111/j.1471-4159.2011.07624.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Li MM, Wu LY, Zhao T, Wu KW, Xiong L, Zhu LL, Fan M. The protective role of 5-hydroxymethyl-2-furfural (5-HMF) against acute hypobaric hypoxia. Cell Stress Chaperones 2011; 16:529-37. [PMID: 21494793 PMCID: PMC3156263 DOI: 10.1007/s12192-011-0264-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Revised: 03/17/2011] [Accepted: 03/18/2011] [Indexed: 01/18/2023] Open
Abstract
Our previous study showed that pretreatment with 5-hydroxymethyl-2-furfural (5-HMF) led to protection against hypoxic injury via a p-ERK-mediated pathway in vitro. Whether the protection of 5-HMF against hypoxia is effective in vivo is unknown. The present study is aimed to verify the role of 5-HMF in acute hypobaric hypoxia using Kunming mice as an in vivo model and further investigate the underlying mechanisms. Mice pretreated with or without 5-HMF for 1 h were exposed to acute hypobaric hypoxic condition for 6 h and then the survival time, the survival rate, the permeability of blood-brain barrier (BBB), the histological analysis in hippocampus and cortex, and the phosphorylation level of mitogen-activated protein kinases (ERK, JNK, and p38) were investigated. The results showed that 5-HMF significantly increased the survival time and the survival rate of mice. Accordingly, pretreatment with 5-HMF markedly attenuated acute hypobaric hypoxia-induced permeability of BBB (P < 0.01). In addition, the cellular damage extent of the hippocampus and the cortex induced by hypoxia for 6 h was also attenuated by pretreatment with 5-HMF, especially in the hippocampus CA1 region. Furthermore, the activation of ERK rather than JNK and p38 was involved in the protection of 5-HMF against acute hypobaric hypoxia. In summary, 5-HMF enhanced the survival capability of mice and decreased acute hypoxic damage to the brain, which may be associated with the effects on BBB and p-ERK.
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Affiliation(s)
- Ming-Ming Li
- Department of Neurobiology, Beijing Institute for Neuro-Science, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 People’s Republic of China
- Department of Brain Protection and Plasticity, Institute of Basic Medical Sciences, No. 27 Taiping Rd., Beijing, 100850 People’s Republic of China
| | - Li-Ying Wu
- Department of Brain Protection and Plasticity, Institute of Basic Medical Sciences, No. 27 Taiping Rd., Beijing, 100850 People’s Republic of China
| | - Tong Zhao
- Department of Brain Protection and Plasticity, Institute of Basic Medical Sciences, No. 27 Taiping Rd., Beijing, 100850 People’s Republic of China
| | - Kui-Wu Wu
- Department of Brain Protection and Plasticity, Institute of Basic Medical Sciences, No. 27 Taiping Rd., Beijing, 100850 People’s Republic of China
| | - Lei Xiong
- Department of Brain Protection and Plasticity, Institute of Basic Medical Sciences, No. 27 Taiping Rd., Beijing, 100850 People’s Republic of China
| | - Ling-Ling Zhu
- Department of Brain Protection and Plasticity, Institute of Basic Medical Sciences, No. 27 Taiping Rd., Beijing, 100850 People’s Republic of China
| | - Ming Fan
- Department of Neurobiology, Beijing Institute for Neuro-Science, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 People’s Republic of China
- Department of Brain Protection and Plasticity, Institute of Basic Medical Sciences, No. 27 Taiping Rd., Beijing, 100850 People’s Republic of China
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Zhang N, Yin Y, Han S, Jiang J, Yang W, Bu X, Li J. Hypoxic preconditioning induced neuroprotection against cerebral ischemic injuries and its cPKCγ-mediated molecular mechanism. Neurochem Int 2011; 58:684-92. [DOI: 10.1016/j.neuint.2011.02.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Accepted: 02/09/2011] [Indexed: 10/18/2022]
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Differential Roles of Phosphorylated AMPA Receptor GluR1 Subunits at Serine-831 and Serine-845 Sites in Spinal Cord Dorsal Horn in a Rat Model of Post-Operative Pain. Neurochem Res 2010; 36:170-6. [DOI: 10.1007/s11064-010-0288-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2010] [Indexed: 11/24/2022]
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Yang L, Yang L, Gao X. Transcutaneous Electrical Nerve Stimulation on Yongquan Acupoint Reduces CFA-Induced Thermal Hyperalgesia of Rats via Down-Regulation of ERK2 Phosphorylation and c-Fos Expression. Anat Rec (Hoboken) 2010; 293:1207-13. [DOI: 10.1002/ar.21157] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Qu Y, Shi X, Zhang H, Sun W, Han S, Yu C, Li J. VCAM-1 siRNA reduces neointimal formation after surgical mechanical injury of the rat carotid artery. J Vasc Surg 2009; 50:1452-8. [PMID: 19958991 DOI: 10.1016/j.jvs.2009.08.050] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2009] [Revised: 08/14/2009] [Accepted: 08/15/2009] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Restenosis is one of several complications following carotid endarterectomy (CEA). The pathogenesis of restenosis may be related to postsurgery inflammation and leukocyte recruitment mediated by cellular adhesion molecules. In this study, we examine the role of vascular cell adhesion molecule-1 (VCAM-1) in carotid neointimal hyperplasia following carotid surgical mechanical de-endothelialization (CSMDE) in a rat model of CEA. METHODS The inhibition of siRNA on VCAM-1 protein expression was determined by using the methods of immunostaining and Western blot. Ultrasound imaging and morphometric analysis were applied to measure the degree of CSMDE-induced carotid artery neointimal hyperplasia of rats. RESULTS We found that a lentivirus-based construct expressing a small interfering RNA (siRNA) against VCAM-1 could effectively (P < .05, n = 10 per group) reduce VCAM-1 protein expression in the carotid arteries of rats undergoing CSMDE (CSMDE+RNAi: 135.0 +/- 27.6%) when compared that of CSMDE with scrambled siRNA (CSMDE+CON: 182.7 +/- 36.4%). Doppler ultrasonography revealed that CSMDE+RNAi was accompanied by a significant reduction in the extent of stenosis demonstrated by increased blood velocity (665.85 +/- 48.37 mm/s) and linear diameter (0.59 +/- 0.77 mm) compared to CSMDE+CON (46.72 +/- 28.67 mm/s with undetectable linear diameter, P < .05, n = 10 per group). In addition, morphometric analysis of hematoxylin and eosin (HE)-stained sections indicated that the intima (innermost layer of media at lesion site)/media area ratio (I/M) was significantly increased (P < .05, n = 10 per group) both in the CSMDE (3.99 +/- 0.65) and CSMDE+CON (4.33 +/- 0.59) groups compared with the SHAM group (0.35 +/- 0.13). However, CSMDE+RNAi resulted in a significant (P < .05, n = 10 per group) decrease in the I/M ratio (1.79 +/- 0.43) compared to CSMDE+CON, whereas there were no significant differences in the total arterial area and medial areas among the groups. CONCLUSION These results suggest that perivascular events mediated by VCAM-1 are likely to play an important role in the pathogenesis of carotid artery neointimal hyperplasia in rats after CSMDE.
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Affiliation(s)
- Yanming Qu
- Department of Neurosurgery, Capital Medical University Affiliated Fu Xing Hospital, Beijing PR China
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Propofol and Ketamine-induced Anesthetic Depth-dependent Decrease of CaMKII Phosphorylation Levels in Rat Hippocampus and Cortex. J Neurosurg Anesthesiol 2009; 21:145-54. [DOI: 10.1097/ana.0b013e31819ac2c0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Jiang J, Yang W, Huang P, Bu X, Zhang N, Li J. Increased Phosphorylation of Ets-like Transcription Factor-1 in Neurons of Hypoxic Preconditioned Mice. Neurochem Res 2009; 34:1443-50. [DOI: 10.1007/s11064-009-9931-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2008] [Accepted: 02/04/2009] [Indexed: 11/28/2022]
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Shao G, Zhang R, Wang ZL, Gao CY, Huo X, Lu GW. Hypoxic preconditioning improves spatial cognitive ability in mice. Neurosignals 2008; 15:314-21. [PMID: 18349553 DOI: 10.1159/000121368] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2007] [Accepted: 01/28/2008] [Indexed: 02/05/2023] Open
Abstract
Although it has been reported in a lot of studies that hypoxic preconditioning could protect the brain from hypoxic/ischemic injury, it is not clear whether hypoxic preconditioning could affect brain functions such as cognitive ability. This work aims at investigating the effect of hypoxic preconditioning on spatial cognitive ability in mice after acute and repeated hypoxic exposures. The mice were randomly divided into 3 groups: a control group in which mice were not exposed to hypoxia (H0) and experimental groups in which mice encountered hypoxia either once (H1) or 4 times (H4). Neural cell adhesion molecule (NCAM) expression, long-term potentiation (LTP) recording and Morris water maze test were used to measure the animals' cognitive ability. The tolerance time was progressively prolonged as exposure went on. The expression of both NCAM mRNA and NCAM protein as well as the LTP induction rate decreased in group H1, but recovered to control level in group H4. The performance of mice in the maze test was improved in H4 in comparison with that in both H1 and H0. These findings may indicate that spatial cognitive ability is improved in adult mice by their hypoxic preconditioning.
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Affiliation(s)
- Guo Shao
- Central Laboratory, Shantou University Medical College, Shantou, China
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Wei Y, Wang N, Lu Q, Zhang N, Zheng D, Li J. Enhanced protein expressions of sortilin and p75NTR in retina of rat following elevated intraocular pressure-induced retinal ischemia. Neurosci Lett 2007; 429:169-74. [PMID: 17997040 DOI: 10.1016/j.neulet.2007.10.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2007] [Revised: 09/18/2007] [Accepted: 10/05/2007] [Indexed: 10/22/2022]
Abstract
Elevated introcular pressure (IOP)-induced retinal neuron ischemic death includes an early phase of necrosis and prolonged phase of apoptosis. We used this ischemic model to observe the changes of sortilin and p75(NTR) protein expressions in rat retina. The results of Western blot analysis showed the expression of p75(NTR) at the band of 75 (mature form), 60 (non-glycosylated pieces) and 50 kDa (ectodomain shedding pieces), and the expression of sortilin at the 95 and 90 kDa (the mature form). The protein expressions of p75(NTR) (60 and 50 kDa pieces) and sortilin (90 kDa) increased significantly (p < 0.05) at days 3, 5 and 7 after retinal ischemia. This effect was also confirmed by immunofluorescence staining. Sortilin was primarily present in cell membrane of the ganglion cells layer (GCL) and large ganglion cell bodies by immunofluorescence labeling. There was little expression of p75(NTR) in the normal retina, while expression increased extensively in GCL, inner plexiform layer (IPL) and inner nuclear layer (INL) after retinal ischemia. p75(NTR) was shown to co-localize with neurofilament in the axons of neuronal cells by double-labeling. These results suggested that the protein expressions of 60 and 50 kDa forms of p75(NTR), and the 90 kDa mature form of sortilin increased in ischemia-induced retinal neuron of rats.
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Affiliation(s)
- Yong Wei
- Beijing TongRen Eye Center, Beijing Tongren Hospital; Vision Science Laboratory, School of Ophthalmology, Capital Medical University, Beijing 100730, China
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