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Liu N, Zhang Y, Zhang P, Gong K, Zhang C, Sun K, Shao G. Vascular Endothelial Growth Factor and Erythropoietin Show Different Expression Patterns in the Early and Late Hypoxia Preconditioning Phases and May Correlate with DNA Methylation Status in the Mouse Hippocampus. High Alt Med Biol 2022; 23:361-368. [PMID: 36449395 DOI: 10.1089/ham.2021.0108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Liu, Na, Yanbo Zhang, Pu Zhang, Kerui Gong, Chunyang Zhang, Kai Sun, and Guo Shao. Vascular endothelial growth factor and erythropoietin show different expression patterns in the early and late hypoxia preconditioning phases and may correlate with DNA methylation status in the mouse hippocampus. High Alt Med Biol. 23:361-368, 2022. Background: Vascular endothelial growth factor (VEGF) and erythropoietin (EPO) have been proven to participate in neuroprotection induced by hypoxia preconditioning (HPC), and they can be regulated by hypoxia-inducible factor 1 (HIF-1). It has been reported that DNA methylation can affect VEGF and EPO expression. This study aimed to explore the expression of VEGF and EPO in the early phase and late phase of HPC and whether their expression was affected by DNA methylation. Method: Acute repeated HPC mice were used as the animal model, and detection of molecular changes was performed immediately (early phase) and 1 day (late phase) after HPC treatment. The mRNA and protein expression levels of VEGF, EPO, and DNA methyltransferases (DNMTs) in the hippocampi were measured by real-time polymerase chain reaction and western blotting, respectively. The activity of DNMTs and global methylation levels were analyzed by enzyme-linked immunosorbent assay. DNA methylation levels of VEGF and EPO promoters, which were catalyzed by DNMTs, were determined by bisulfite-modified DNA sequencing. Results: The expression of VEGF was increased in the early phase and late phase of HPC (p < 0.05), whereas the expression of EPO was unchanged in the early phase (p > 0.05) of HPC and was increased in the late phase (p < 0.05). VEGF and EPO expression were negatively correlated with the DNA methylation levels of their promoters. DNMT3A and DNMT3B were decreased in the early phase and late phase (p < 0.05), whereas DNMT1 was unchanged in the early phase and late phase (p > 0.05). Conclusions: Our data demonstrated that DNMTs affect VEGF and EPO expression by regulating the DNA methylation levels of the promoters of VEGF and EPO.
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Affiliation(s)
- Na Liu
- Department of Laboratory Medicine, Center for Translational Medicine, the Third People's Hospital of Longgang District, Shenzhen, China.,Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College of Neuroscience Institute, Baotou Medical College, Inner Mongolia, China.,Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Yanbo Zhang
- Department of Laboratory Medicine, Center for Translational Medicine, the Third People's Hospital of Longgang District, Shenzhen, China.,Department of Neurology, The Second Affiliated Hospital of Shandong First Medical University, Shandong, China
| | - Pu Zhang
- Department of Laboratory Medicine, Center for Translational Medicine, the Third People's Hospital of Longgang District, Shenzhen, China.,Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College of Neuroscience Institute, Baotou Medical College, Inner Mongolia, China.,Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Kerui Gong
- Department of Oral and Maxillofacial Surgery, University of California San Francisco, San Francisco, California, USA
| | - Chunyang Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Baotou Medical College, Inner Mongolia, China
| | - Kai Sun
- Department of Laboratory Medicine, Center for Translational Medicine, the Third People's Hospital of Longgang District, Shenzhen, China.,Joint Laboratory of South China Hospital Affiliated to Shenzhen University and Third People's Hospital of Longgang District, Shenzhen University, Shenzhen, China
| | - Guo Shao
- Department of Laboratory Medicine, Center for Translational Medicine, the Third People's Hospital of Longgang District, Shenzhen, China.,Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College of Neuroscience Institute, Baotou Medical College, Inner Mongolia, China.,Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China.,Department of Neurosurgery, The First Affiliated Hospital of Baotou Medical College, Inner Mongolia, China.,Joint Laboratory of South China Hospital Affiliated to Shenzhen University and Third People's Hospital of Longgang District, Shenzhen University, Shenzhen, China
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2
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Shi Q, Feng N, Ma Q, Wang S, Zhang H, Huang D, Sun J, Shi M. ZNF354C Mediated by DNMT1 Ameliorates Lung Ischemia-Reperfusion Oxidative Stress Injury by Reducing TFPI Promoter Methylation to Upregulate TFPI. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:7288729. [PMID: 35915612 PMCID: PMC9338733 DOI: 10.1155/2022/7288729] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 05/06/2022] [Accepted: 05/27/2022] [Indexed: 12/02/2022]
Abstract
Background Pulmonary ischemia reperfusion- (I/R-) induced dysfunction is a significant clinical problem after lung transplantation. In this study, we aim to explore the molecular mechanism of lung I/R injury (LIRI). Methods Bioinformatic analysis of gene involved in oxidative stress. A HUVEC oxygen glucose deprivation/reoxygenation (OGD/R) model and I/R mouse model were first established via I/R. The cellular proliferation, migration, reactive oxygen species (ROS), and parameters of lung injury were assessed via CCK-8, EdU staining, Transwell, cellular ROS kit, and H&E staining. We also confirmed related gene expressions and protein levels and the interaction between the tissue factor pathway inhibitor (TFPI) promotor and ZNF354C. Results Bioinformatic analysis results showed TFPI contributed to oxidative stress. OGD/R caused a reduction in cell viability and migration, hypermethylation of TFPI, increased ROS, and downregulation of ZNF354C, TFPI, and DNA methyltransferases (DNMTs) in HUVECs. Besides, ZNF354C could directly bind to the TFPI promoter, enhance proliferation and migration, and inhibit ROS in OGD/R-induced HUVECs by upregulating TFPI. More importantly, we discovered that 5-Aza could reduce TFPI methylation, upregulate TFPI, and enhance the binding of ZNF354C to the TFPI promoter in LIRI. Furthermore, DNMT1 silencing could induce proliferation and migration and prevent ROS in OGD/R-induced HUVECs by upregulating ZNF354C. Additionally, we verified that ZNF354C could alleviate LIRI by preventing DNA methylation in vivo. Conclusions ZNF354C overexpression induced proliferation and migration, as well as suppressed ROS in OGD/R-induced HUVECs, and alleviated LIRI in mice by inhibiting TFPI promoter methylation to upregulate TFPI. Therefore, ZNF354C and TFPI methylation might be promising molecular markers for LIRI therapy.
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Affiliation(s)
- Qi Shi
- Department of Thoracic and Cardiovascular Surgery, Huashan Hospital, Affiliated with Fudan University, Shanghai 200040, China
- Department of Respiratory Endoscopy, Department of Respiratory and Critical Care Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Nana Feng
- Department of Respiratory and Critical Medicine, Shanghai Eighth People's Hospital Affiliated to Jiang Su University, Shanghai 200030, China
| | - Qingyun Ma
- Department of Thoracic and Cardiovascular Surgery, Huashan Hospital, Affiliated with Fudan University, Shanghai 200040, China
| | - Shaohua Wang
- Department of Thoracic and Cardiovascular Surgery, Huashan Hospital, Affiliated with Fudan University, Shanghai 200040, China
| | - Huijun Zhang
- Department of Thoracic and Cardiovascular Surgery, Huashan Hospital, Affiliated with Fudan University, Shanghai 200040, China
| | - Dayu Huang
- Department of Thoracic and Cardiovascular Surgery, Huashan Hospital, Affiliated with Fudan University, Shanghai 200040, China
| | - Jiayuan Sun
- Department of Respiratory Endoscopy, Department of Respiratory and Critical Care Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Meng Shi
- Department of Thoracic and Cardiovascular Surgery, Huashan Hospital, Affiliated with Fudan University, Shanghai 200040, China
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Lee TK, Hong J, Lee JW, Kim SS, Sim H, Lee JC, Kim DW, Lim SS, Kang IJ, Won MH. Ischemia-Induced Cognitive Impairment Is Improved via Remyelination and Restoration of Synaptic Density in the Hippocampus after Treatment with COG-Up ® in a Gerbil Model of Ischemic Stroke. Vet Sci 2021; 8:vetsci8120321. [PMID: 34941848 PMCID: PMC8705370 DOI: 10.3390/vetsci8120321] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/07/2021] [Accepted: 12/09/2021] [Indexed: 12/13/2022] Open
Abstract
Cerebrovascular disease such as ischemic stroke develops cognitive impairment due to brain tissue damage including neural loss, demyelination and decrease in synaptic density. In the present study, we developed transient ischemia in the forebrain of the gerbil and found cognitive impairment using the Barnes maze test and passive avoidance test for spatial memory and learning memory, respectively. In addition, neuronal loss/death was detected in the Cornu Ammonis 1 (CA1) region of the gerbil hippocampus after the ischemia by cresyl violet histochemistry, immunohistochemistry for neuronal nuclei and histofluorescence with Fluoro-Jade B. Furthermore, in the CA1 region following ischemia, myelin and vesicular synaptic density were significantly decreased using immunohistochemistry for myelin basic protein and vesicular glutamate transporter 1. In the gerbils, treatment with COG-up® (a combined extract of Erigeron annuus (L.) Pers. and Brassica oleracea Var.), which was rich in scutellarin and sinapic acid, after the ischemia, significantly improved ischemia-induced decline in memory function when compared with that shown in gerbils treated with vehicle after the ischemia. In the CA1 region of these gerbils, COG-up® treatment significantly promoted the remyelination visualized using immunohistochemistry myelin basic protein, increased oligodendrocytes visualized using a receptor-interacting protein, and restored the density of glutamatergic synapses visualized using double immunofluorescence for vesicular glutamate transporter 1 and microtubule-associated protein, although COG-up® treatment did not protect pyramidal cells (principal neurons) located in the CA1 region form the ischemic insult. Considering the current findings, a gerbil model of ischemic stroke apparently showed cognitive impairment accompanied by ischemic injury in the hippocampus; also, COG-up® can be employed for improving cognitive decline following ischemia-reperfusion injury in brains.
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Affiliation(s)
- Tae-Kyeong Lee
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea; (T.-K.L.); (S.S.L.)
| | - Junkee Hong
- Department of Global Innovative Drug, Chung-Ang University, Seoul 06974, Korea;
| | - Ji-Won Lee
- Famenity Co., Ltd., Uiwang 16006, Korea; (J.-W.L.); (S.-S.K.)
| | - Sung-Su Kim
- Famenity Co., Ltd., Uiwang 16006, Korea; (J.-W.L.); (S.-S.K.)
| | - Hyejin Sim
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon 24341, Korea; (H.S.); (J.-C.L.)
| | - Jae-Chul Lee
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon 24341, Korea; (H.S.); (J.-C.L.)
| | - Dae Won Kim
- Department of Biochemistry and Molecular Biology, Research Institute of Oral Sciences, College of Dentistry, Kangnung-Wonju National University, Gangneung 25457, Korea;
| | - Soon Sung Lim
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea; (T.-K.L.); (S.S.L.)
| | - Il Jun Kang
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea; (T.-K.L.); (S.S.L.)
- Correspondence: (I.J.K.); (M.-H.W.); Tel.: +82-33-248-2135 (I.J.K.); +82-33-250-8891 (M.-H.W.); Fax: +82-33-255-4787 (I.J.K.); +82-33-256-1614 (M.-H.W.)
| | - Moo-Ho Won
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon 24341, Korea; (H.S.); (J.-C.L.)
- Correspondence: (I.J.K.); (M.-H.W.); Tel.: +82-33-248-2135 (I.J.K.); +82-33-250-8891 (M.-H.W.); Fax: +82-33-255-4787 (I.J.K.); +82-33-256-1614 (M.-H.W.)
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Zhang Y, Long H, Wang S, Xiao W, Xiong M, Liu J, Chen L, Chen R, Wei X, Shu Y, Zeng Y, Zhang L. Genome-Wide DNA Methylation Pattern in Whole Blood Associated With Primary Intracerebral Hemorrhage. Front Immunol 2021; 12:702244. [PMID: 34484198 PMCID: PMC8414634 DOI: 10.3389/fimmu.2021.702244] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 07/28/2021] [Indexed: 12/12/2022] Open
Abstract
Primary intracerebral hemorrhage (ICH) is a significant cause of morbidity and mortality throughout the world. ICH is a multifactorial disease that emerges from interactions among multiple genetic and environmental factors. DNA methylation plays an important role in the etiology of complex traits and diseases. We used the Illumina Infinium Human Methylation 850k BeadChip to detect changes in DNA methylation in peripheral blood samples from patients with ICH and healthy controls to explore DNA methylation patterns in ICH. Here, we compared genomic DNA methylation patterns in whole blood from ICH patients (n = 30) and controls (n = 34). The ICH and control groups showed significantly different DNA methylation patterns at 1530 sites (p-value < 5.92E-08), with 1377 hypermethylated sites and 153 hypomethylated sites in ICH patients compared to the methylation status in healthy controls. A total of 371 hypermethylated sites and 35 hypomethylated sites were in promoters, while 738 hypermethylated sites and 67 hypomethylated sites were in coding regions. Furthermore, the differentially methylated genes between ICH patients and controls were largely related to inflammatory pathways. Abnormalities in the DNA methylation pattern identified in the peripheral blood of ICH patients may play an important role in the development of ICH and warranted further investigation.
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Affiliation(s)
- Yupeng Zhang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Hongyu Long
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Sai Wang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Wenbiao Xiao
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Meishan Xiong
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Jianyi Liu
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Lei Chen
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Ruijuan Chen
- Department of Geriatrics, Second Xiangya Hospital, Central South University, Changsha, China
| | - Xueli Wei
- Department of Geriatrics, Second Xiangya Hospital, Central South University, Changsha, China
| | - Yi Shu
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Yi Zeng
- Department of Geriatrics, Second Xiangya Hospital, Central South University, Changsha, China
| | - Le Zhang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
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Li S, Ren C, Stone C, Chandra A, Xu J, Li N, Han C, Ding Y, Ji X, Shao G. Hamartin: An Endogenous Neuroprotective Molecule Induced by Hypoxic Preconditioning. Front Genet 2020; 11:582368. [PMID: 33193709 PMCID: PMC7556298 DOI: 10.3389/fgene.2020.582368] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 09/08/2020] [Indexed: 11/23/2022] Open
Abstract
Hypoxic/ischemic preconditioning (HPC/IPC) is an innate neuroprotective mechanism in which a number of endogenous molecules are known to be involved. Tuberous sclerosis complex 1 (TSC1), also known as hamartin, is thought to be one such molecule. It is also known that hamartin is involved as a target in the rapamycin (mTOR) signaling pathway, which functions to integrate a variety of environmental triggers in order to exert control over cellular metabolism and homeostasis. Understanding the role of hamartin in ischemic/hypoxic neuroprotection will provide a novel target for the treatment of hypoxic-ischemic disease. Therefore, the proposed molecular mechanisms of this neuroprotective role and its preconditions are reviewed in this paper, with emphases on the mTOR pathway and the relationship between the expression of hamartin and DNA methylation.
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Affiliation(s)
- Sijie Li
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China.,Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou, China
| | - Changhong Ren
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China.,Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou, China
| | - Christopher Stone
- Department of Neurosurgery, Wayne State University School of Medicine, Detroit, MI, United States
| | - Ankush Chandra
- Department of Neurosurgery, Wayne State University School of Medicine, Detroit, MI, United States
| | - Jiali Xu
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Ning Li
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Cong Han
- Department of Neurosurgery, The Fifth Medical Centre of PLA General Hospital, Beijing, China
| | - Yuchuan Ding
- Department of Neurosurgery, Wayne State University School of Medicine, Detroit, MI, United States
| | - Xunming Ji
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Guo Shao
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China.,Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou, China.,Public Health Department, Biomedicine Research Center, Basic Medical College, Baotou, China.,Baotou Medical College of Neuroscience Institute, Baotou Medical College, Baotou, China
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Martínez-Iglesias O, Carrera I, Carril JC, Fernández-Novoa L, Cacabelos N, Cacabelos R. DNA Methylation in Neurodegenerative and Cerebrovascular Disorders. Int J Mol Sci 2020; 21:ijms21062220. [PMID: 32210102 PMCID: PMC7139499 DOI: 10.3390/ijms21062220] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 03/18/2020] [Accepted: 03/18/2020] [Indexed: 02/08/2023] Open
Abstract
DNA methylation is an epigenetic mechanism by which methyl groups are added to DNA, playing a crucial role in gene expression regulation. The aim of the present study is to compare methylation status of healthy subjects with that of patients with Alzheimer’s, Parkinson’s or Cerebrovascular diseases. We also analyze methylation status of a transgenic Alzheimer’s disease mouse model (3xTg-AD). Our results show that both global methylation (n = 141) and hydroxymethylation (n = 131) levels are reduced in DNA samples from buffy coats of patients with neurodegenerative disorders and age-related cerebrovascular disease. The importance of methylation and hydroxymethylation reduction is stressed by the finding that DNMT3a mRNA levels are also downregulated in buffy coats of patients with Dementia (n = 25). Global methylation is also reduced in brain, liver and serum samples of 3xTg-AD vs. wild type mice, such as DNMT3a mRNA levels that are also decreased in the brain of 3xTg-AD (n = 10). These results suggest that the use of global methylation and hydroxymethylation levels, together with the study of DNMT3a expression, could be useful as a new diagnostic biomarker for these prevalent disorders.
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Lee JC, Shin BN, Cho JH, Lee TK, Kim IH, Noh Y, Kim SS, Lee HA, Kim YM, Kim H, Cho JH, Park JH, Ahn JH, Kang IJ, Hwang IK, Won MH, Shin MC. Brain ischemic preconditioning protects against moderate, not severe, transient global cerebral ischemic injury. Metab Brain Dis 2018; 33:1193-1201. [PMID: 29644488 DOI: 10.1007/s11011-018-0231-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 04/06/2018] [Indexed: 12/12/2022]
Abstract
Ischemic preconditioning (IPC) in the brain increases ischemic tolerance to subsequent ischemic insults. In this study, we examined whether IPC protects neurons and attenuates microgliosis or not in the hippocampus following severe transient global cerebral ischemia (TCI) in gerbils. Gerbils were assigned to 8 groups; 5- and 15-min sham operated groups, 5-min and 15-min TCI operated groups, IPC plus 5- and 15-min sham operated groups, and IPC plus 5- and 15-min TCI operated groups. IPC was induced by subjecting animals to 2-min transient ischemia 1 day before 5-min TCI for a typical transient ischemia and 15-min TCI for severe transient ischemia. Neuronal damage was examined by cresyl violet staining and Fluoro-Jade B histofluorescence staining. In addition, microglial activation was examined using immunohistochemistry for Iba-1 (a marker for microglia). Delayed neuronal death and microgliosis was found in the CA1 alone in the 5-min TCI operated group at 5 days post-ischemia, and, in the 15-min TCI operated group, neuronal death and microgliosis was shown in all CA areas (CA1-3) and the dentate gyrus. IPC displayed neuroprotection and attenuated microglial activation in the 5-min TCI operated group. However, in the 15-min TCI operated group, IPC did not show neuroprotection and not attenuate microglial activation. Our present findings indicate that IPC hardly protect against severe transient cerebral ischemic injury.
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Affiliation(s)
- Jae-Chul Lee
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Bich-Na Shin
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Jeong Hwi Cho
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Tae-Kyeong Lee
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - In Hye Kim
- Famenity Company, Gwacheon, 13837, Republic of Korea
| | - YooHun Noh
- Famenity Company, Gwacheon, 13837, Republic of Korea
| | - Sung-Su Kim
- Famenity Company, Gwacheon, 13837, Republic of Korea
| | - Hyang-Ah Lee
- Department of Obstetrics and Gynecology, School of Medicine, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Young-Myeong Kim
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Hyeyoung Kim
- Department of Anesthesiology and Pain Medicine, Chungju Hospital, Konkuk University School of Medicine, Chungju, 27376, Republic of Korea
- Department of Emergency Medicine, Kangwon National University Hospital, School of Medicine, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Jun Hwi Cho
- Department of Emergency Medicine, Kangwon National University Hospital, School of Medicine, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Joon Ha Park
- Department of Biomedical Science and Research Institute for Bioscience and Biotechnology, Hallym University, Chuncheon, 24252, Republic of Korea
| | - Ji Hyeon Ahn
- Department of Biomedical Science and Research Institute for Bioscience and Biotechnology, Hallym University, Chuncheon, 24252, Republic of Korea
| | - Il Jun Kang
- Department of Food Science and Nutrition, Hallym University, Chuncheon, 24252, Republic of Korea
| | - In Koo Hwang
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, and Research Institute for Veterinary Science, Seoul National University, Seoul, 08826, South Korea
| | - Moo-Ho Won
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, 24341, Republic of Korea.
| | - Myoung Cheol Shin
- Department of Emergency Medicine, Kangwon National University Hospital, School of Medicine, Kangwon National University, Chuncheon, 24341, Republic of Korea.
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Lee JC, Park CW, Shin MC, Cho JH, Lee HA, Kim YM, Park JH, Ahn JH, Cho JH, Tae HJ, Hwang IK, Lee TK, Won MH, Kang IJ. Tumor necrosis factor receptor 2 is required for ischemic preconditioning-mediated neuroprotection in the hippocampus following a subsequent longer transient cerebral ischemia. Neurochem Int 2018; 118:292-303. [PMID: 29777731 DOI: 10.1016/j.neuint.2018.05.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 04/26/2018] [Accepted: 05/14/2018] [Indexed: 01/08/2023]
Abstract
Tumor Necrosis Factor-α (TNF-α) is a proinflammatory cytokine implicated in neuronal damage in response to cerebral ischemia. Ischemic preconditioning (IPC) provides neuroprotection against a subsequent severer or longer transient ischemia by ischemic tolerance. Here, we focused on the role of TNF-α in IPC-mediated neuroprotection against neuronal death following a subsequent longer transient cerebral ischemia (TCI). Gerbils used in this study were randomly assigned to eight groups; sham group, TCI operated group, IPC plus (+) sham group, IPC + TCI operated group, sham + etanercept (an inhibitor of TNF-a) group, TCI + etanercept group, IPC + sham + etanercept group, and IPC + TCI + etanercept group. IPC was induced by a 2-min sublethal transient ischemia, which was operated 1 day prior to a longer (5-min) TCI. A significant death of neurons was found in the stratum pyramidale (SP) in the CA1 area (CA1) of the hippocampus 5 days after TCI; however, IPC protected SP neurons from TCI. We found that TNF-α immunoreactivity was significantly increased in CA1 pyramidal neurons in the TCI and IPC + TCI groups compared to the sham group. TNF-R1 expression in CA1 pyramidal neurons of the TCI group was also increased 1 and 2 days after TCI; however, in the IPC + TCI group, TNF-R1 expression was significantly lower than that in the TCI group. On the other hand, we did not detect TNF-R2 immunoreactivity in CA1 pyramidal neurons 1 and 2 days after TCI; meanwhile, in the IPC + TCI group, TNF-R2 expression was significantly increased compared to TNF-R2 expression at 1 and 2 days after TCI. In addition, in this group, TNF-R2 was newly expressed in pericytes, which are important cells in the blood brain barrier, from 1 day after TCI. When we treated etanercept to the IPC + TCI group, IPC-induced neuroprotection was significantly weakened. In brief, this study indicates that IPC confers neuroprotection against TCI by TNF-α signaling through TNF-R2 and suggests that the enhancement of TNF-R2 expression by IPC may be a legitimate strategy for a therapeutic intervention of TCI.
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Affiliation(s)
- Jae-Chul Lee
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, Gangwon, 24341 Republic of Korea
| | - Chan Woo Park
- Department of Emergency Medicine, School of Medicine, Kangwon National University, Chuncheon, Gangwon, 24341 Republic of Korea
| | - Myoung Cheol Shin
- Department of Emergency Medicine, School of Medicine, Kangwon National University, Chuncheon, Gangwon, 24341 Republic of Korea
| | - Jun Hwi Cho
- Department of Emergency Medicine, School of Medicine, Kangwon National University, Chuncheon, Gangwon, 24341 Republic of Korea
| | - Hyang-Ah Lee
- Department of Obstetrics and Gynecology, School of Medicine, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Young-Myeong Kim
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Joon Ha Park
- Department of Biomedical Science and Research Institute for Bioscience and Biotechnology, Hallym University, Chuncheon, Gangwon, 24252 Republic of Korea
| | - Ji Hyeon Ahn
- Department of Biomedical Science and Research Institute for Bioscience and Biotechnology, Hallym University, Chuncheon, Gangwon, 24252 Republic of Korea
| | - Jeong Hwi Cho
- Bio-Safety Research Institute, College of Veterinary Medicine, Chonbuk National University, Iksan, Chonbuk, 54596 Republic of Korea
| | - Hyun-Jin Tae
- Bio-Safety Research Institute, College of Veterinary Medicine, Chonbuk National University, Iksan, Chonbuk, 54596 Republic of Korea
| | - In Koo Hwang
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, and Research Institute for Veterinary Science, Seoul National University, Seoul, 08826 Republic of Korea
| | - Tae-Kyeong Lee
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, Gangwon, 24341 Republic of Korea
| | - Moo-Ho Won
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, Gangwon, 24341 Republic of Korea.
| | - Il Jun Kang
- Department of Food Science and Nutrition, Hallym University, Chuncheon, Gangwon, 24252 Republic of Korea.
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9
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Lee JC, Kim YH, Lee TK, Kim IH, Cho JH, Cho GS, Shin BN, Park JH, Ahn JH, Shin MC, Cho JH, Kang IJ, Won MH, Seo JY. Effects of ischemic preconditioning on PDGF-BB expression in the gerbil hippocampal CA1 region following transient cerebral ischemia. Mol Med Rep 2017. [PMID: 28627606 PMCID: PMC5562056 DOI: 10.3892/mmr.2017.6799] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Ischemic preconditioning (IPC) is induced by exposure to brief durations of transient ischemia, which results in ischemic tolerance to a subsequent longer or lethal period of ischemia. In the present study, the effects of IPC (2 min of transient cerebral ischemia) were examined on immunoreactivity of platelet‑derived growth factor (PDGF)‑BB and on neuroprotection in the gerbil hippocampal CA1 region following lethal transient cerebral ischemia (LTCI; 5 min of transient cerebral ischemia). IPC was subjected to a 2‑min sublethal ischemia and a LTCI was given 5‑min transient ischemia. The animals in all of the groups were given recovery times of 1, 2 and 5 days and change in PDGF‑BB immunoreactivity was examined as was the neuronal damage/death in the hippocampus induced by LTCI. LTCI induced a significant loss of pyramidal neurons in the hippocampal CA1 region 5 days after LTCI, and significantly decreased PDGF‑BB immunoreactivity in the CA1 pyramidal neurons from day 1 after LTCI. Conversely, IPC effectively protected the CA1 pyramidal neurons from LTCI and increased PDGF‑BB immunoreactivity in the CA1 pyramidal neurons post‑LTCI. In conclusion, the results demonstrated that LTCI significantly altered PDGF‑BB immunoreactivity in pyramidal neurons in the hippocampal CA1 region, whereas IPC increased the immunoreactivity. These findings indicated that PDGF‑BB may be associated with IPC‑mediated neuroprotection.
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Affiliation(s)
- Jae-Chul Lee
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Yang Hee Kim
- Department of Surgery, School of Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Tae-Kyeong Lee
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - In Hye Kim
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Jeong Hwi Cho
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Geum-Sil Cho
- Pharmacology and Toxicology Department, Shinpoong Pharmaceutical Co., Ltd., Ansan, Gyeonggi 15610, Republic of Korea
| | - Bich-Na Shin
- Department of Physiology, College of Medicine, Hallym University, Chuncheon, Gangwon 24252, Republic of Korea
| | - Joon Ha Park
- Department of Biomedical Science, Research Institute of Bioscience and Biotechnology, Hallym University, Chuncheon, Gangwon 24252, Republic of Korea
| | - Ji Hyeon Ahn
- Department of Biomedical Science, Research Institute of Bioscience and Biotechnology, Hallym University, Chuncheon, Gangwon 24252, Republic of Korea
| | - Myoung Cheol Shin
- Department of Emergency Medicine, School of Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Jun Hwi Cho
- Department of Emergency Medicine, School of Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Il Jun Kang
- Department of Food Science and Nutrition, Hallym University, Chuncheon, Gangwon 24252, Republic of Korea
| | - Moo-Ho Won
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Jeong Yeol Seo
- Department of Emergency Medicine, Chuncheon Sacred Heart Hospital, College of Medicine, Hallym University, Chuncheon, Gangwon 24252, Republic of Korea
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10
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Hu Z, Zhong B, Tan J, Chen C, Lei Q, Zeng L. The Emerging Role of Epigenetics in Cerebral Ischemia. Mol Neurobiol 2016; 54:1887-1905. [PMID: 26894397 DOI: 10.1007/s12035-016-9788-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Accepted: 02/11/2016] [Indexed: 12/14/2022]
Abstract
Despite great progresses in the treatment and prevention of ischemic stroke, it is still among the leading causes of death and serious long-term disability all over the world, indicating that innovative neural regenerative and neuroprotective agents are urgently needed for the development of therapeutic approaches with greater efficacy for ischemic stroke. More and more evidence suggests that a spectrum of epigenetic processes play an important role in the pathophysiology of cerebral ischemia. In the present review, we first discuss recent developments in epigenetic mechanisms, especially their roles in the pathophysiology of cerebral ischemia. Specifically, we focus on DNA methylation, histone deacetylase, histone methylation, and microRNAs (miRNAs) in the regulation of vascular and neuronal regeneration after cerebral ischemia. Additionally, we highlight epigenetic strategies for ischemic stroke treatments, including the inhibition of histone deacetylase enzyme and DNA methyltransferase activities, and miRNAs. These therapeutic strategies are far from clinic use, but preliminary data indicate that neuroprotective agents targeting these pathways can modulate neural cell regeneration and promote brain repair and functional recovery after cerebral ischemia. A better understanding of how epigenetics influences the process and progress of cerebral ischemia will pave the way for discovering more sensitive and specific biomarkers and new targets and therapeutics for ischemic stroke.
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Affiliation(s)
- Zhiping Hu
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Bingwu Zhong
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.,Department of Traditional Chinese Medicine, Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Jieqiong Tan
- National Key Laboratory of Medical Genetics, Central South University, Changsha, 410078, Hunan, China
| | - Chunli Chen
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Qiang Lei
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Liuwang Zeng
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.
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11
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Tang Y, Han S, Asakawa T, Luo Y, Han X, Xiao B, Dong Q, Wang L. Effects of intracerebral hemorrhage on 5-hydroxymethylcytosine modification in mouse brains. Neuropsychiatr Dis Treat 2016; 12:617-24. [PMID: 27042073 PMCID: PMC4801193 DOI: 10.2147/ndt.s97456] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The past decade has resulted in an increase in the knowledge of molecular mechanisms underlying brain injury induced by intracerebral hemorrhage (ICH). Recent advances have provided a link between epigenetic modification and the regulation of gene expression. 5-hydroxymethylcytosine (5hmC) converted from 5-methylcytosine by the ten-eleven translocation (TET) family of proteins has emerged as a new epigenetic modification. While the dynamics of 5hmC during cerebral ischemia have recently been reported, whether 5hmC is involved in ICH remains unexplored. In this study, we investigated the effects of ICH on DNA hydroxymethylation. We showed that the global level of 5hmC rapidly decreased as early as 24 hours after ICH and persisted until 72 hours. Furthermore, the level of 5hmC in the CpG-rich regions of Akt2, Pdpk1 and Vegf genes was significantly decreased with a minimum level observed at 48 hours or 72 hours. Decreased 5hmC was observed in parallel with an increase in 5-methylcytosine over this time course, and mRNA levels of Akt2, Pdpk1 and Vegf were downregulated upon ICH injury. Finally, Tet1, Tet2 and Tet3 mRNA levels were dramatically decreased in the ICH brain. Our study for the first time established the correlation between DNA hydroxymethylation and ICH injury. Further investigations should examine whether 5hmC modification could be a therapeutic target for the treatment of ICH injury.
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Affiliation(s)
- Yilin Tang
- Department of Neurology, Huashan Hospital of Fudan University, Shanghai, People's Republic of China
| | - Sha Han
- Department of Neurology, Huashan Hospital of Fudan University, Shanghai, People's Republic of China
| | - Tetsuya Asakawa
- Department of Neurosurgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan; Department of Psychiatry, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Yunhe Luo
- Department of Neurology, Huashan Hospital of Fudan University, Shanghai, People's Republic of China
| | - Xiang Han
- Department of Neurology, Huashan Hospital of Fudan University, Shanghai, People's Republic of China
| | - Baoguo Xiao
- Institute of Neurology, Huashan Hospital of Fudan University, Shanghai, People's Republic of China
| | - Qiang Dong
- Department of Neurology, Huashan Hospital of Fudan University, Shanghai, People's Republic of China; Institute of Neurology, Huashan Hospital of Fudan University, Shanghai, People's Republic of China
| | - Liang Wang
- Department of Neurology, Huashan Hospital of Fudan University, Shanghai, People's Republic of China; Institute of Neurology, Huashan Hospital of Fudan University, Shanghai, People's Republic of China
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12
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Morris MJ, Monteggia LM. Role of DNA methylation and the DNA methyltransferases in learning and memory. DIALOGUES IN CLINICAL NEUROSCIENCE 2015. [PMID: 25364286 PMCID: PMC4214178 DOI: 10.31887/dcns.2014.16.3/mmorris] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Dynamic regulation of chromatin structure in postmitotic neurons plays an important role in learning and memory. Methylation of cytosine nucleotides has historically been considered the strongest and least modifiable of epigenetic marks. Accumulating recent data suggest that rapid and dynamic methylation and demethylation of specific genes in the brain may play a fundamental role in learning, memory formation, and behavioral plasticity. The current review focuses on the emergence of data that support the role of DNA methylation and demethylation, and its molecular mediators in memory formation.
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Affiliation(s)
- Michael J Morris
- Department of Biological Sciences, University of Michigan-Dearborn, Dearborn, Michigan, USA
| | - Lisa M Monteggia
- Department of Neuroscience, UT Southwestern Medical Center, Dallas, Texas, USA
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13
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Zhang S, Zhang Y, Jiang S, Liu Y, Huang L, Zhang T, Lu G, Gong K, Ji X, Shao G. The effect of hypoxia preconditioning on DNA methyltransferase and PP1γ in hippocampus of hypoxia preconditioned mice. High Alt Med Biol 2014; 15:483-90. [PMID: 25531462 DOI: 10.1089/ham.2014.1042] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
It is well known that hypoxia preconditioning can increase hypoxic tolerance by changing the expressions of some genes in the brain. DNA methylation is important for regulating gene expression and is catalyzed by DNA methyltransferase (DNMT), an enzyme that is abundant in the brain. However, the impact of hypoxia preconditioning on DNA methylation remains unknown. In the current study, mice were randomly divided into three groups: blank control group with no exposure to hypoxia (H0), the hypoxia control group exposed to hypoxia once (H1), and the hypoxia preconditioning group exposed to 4 runs of hypoxia (H4). The mRNA and protein levels of three kinds of DNMTs and the activity of total DMNT were measured. Protein phosphatase 1(PP1)γ, which critically regulates neuroprotective pathways in brain, was measured in mRNA and protein activity and promoter methylation. DNMT1 was unchanged in H1 and H4, while DNMT3A and DNMT3B were decreased in H4. The mRNA and protein levels of PP1γ were decreased in H4. However, there was no detectable change in the level of DNA methylation of the promoter of PP1γ (-321 bp to 95 bp). These findings suggest that DNA methylation may have a role in hypoxia neuroprotection, and the change of PP1γ, which did not depend on the change of its promoter (-321 bp to 95bp) DNA methylation, may be involved in neuroprotection.
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Affiliation(s)
- Shu Zhang
- 1 Biomedicine Research Center and Basic Medical College, The First Affiliated Hospital of BaoTou Medical College , Inner Mongolia, People's Republic of China
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14
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Park YS, Cho JH, Kim IH, Cho GS, Cho JH, Park JH, Ahn JH, Chen BH, Shin BN, Shin MC, Tae HJ, Cho YS, Lee YL, Kim YM, Won MH, Lee JC. Effects of ischemic preconditioning on VEGF and pFlk-1 immunoreactivities in the gerbil ischemic hippocampus after transient cerebral ischemia. J Neurol Sci 2014; 347:179-87. [PMID: 25300771 DOI: 10.1016/j.jns.2014.09.044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 09/01/2014] [Accepted: 09/23/2014] [Indexed: 01/19/2023]
Abstract
Ischemia preconditioning (IPC) displays an important adaptation of the CNS to sub-lethal ischemia. In the present study, we examined the effect of IPC on immunoreactivities of VEGF-, and phospho-Flk-1 (pFlk-1) following transient cerebral ischemia in gerbils. The animals were randomly assigned to four groups (sham-operated-group, ischemia-operated-group, IPC plus (+) sham-operated-group, and IPC+ischemia-operated-group). IPC was induced by subjecting gerbils to 2 min of ischemia followed by 1 day of recovery. In the ischemia-operated-group, a significant loss of neurons was observed in the stratum pyramidale (SP) of the hippocampal CA1 region (CA1) alone 5 days after ischemia-reperfusion, however, in all the IPC+ischemia-operated-groups, pyramidal neurons in the SP were well protected. In immunohistochemical study, VEGF immunoreactivity in the ischemia-operated-group was increased in the SP at 1 day post-ischemia and decreased with time. Five days after ischemia-reperfusion, strong VEGF immunoreactivity was found in non-pyramidal cells, which were identified as pericytes, in the stratum oriens (SO) and radiatum (SR). In the IPC+sham-operated- and IPC+ischemia-operated-groups, VEGF immunoreactivity was significantly increased in the SP. pFlk-1 immunoreactivity in the sham-operated- and ischemia-operated-groups was hardly found in the SP, and, from 2 days post-ischemia, pFlk-1 immunoreactivity was strongly increased in non-pyramidal cells, which were identified as pericytes. In the IPC+sham-operated-group, pFlk-1 immunoreactivity was significantly increased in both pyramidal and non-pyramidal cells; in the IPC+ischemia-operated-groups, the similar pattern of VEGF immunoreactivity was found in the ischemic CA1, although the VEGF immunoreactivity was strong in non-pyramidal cells at 5 days post-ischemia. In brief, our findings show that IPC dramatically augmented the induction of VEGF and pFlk-1 immunoreactivity in the pyramidal cells of the CA1 after ischemia-reperfusion, and these findings suggest that the increases of VEGF and Flk-1 expressions may be necessary for neurons to survive from transient ischemic damage.
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Affiliation(s)
- Yoo Seok Park
- Department of Emergency Medicine, School of Medicine, Kangwon National University, Chuncheon 200-701, South Korea; Department of Emergency Medicine, Yonsei University College of Medicine, Seoul 120-752, South Korea
| | - Jun Hwi Cho
- Department of Emergency Medicine, School of Medicine, Kangwon National University, Chuncheon 200-701, South Korea
| | - In Hye Kim
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon 200-701, South Korea
| | - Geum-Sil Cho
- Department of Neuroscience, College of Medicine, Korea University, Seoul 136-705, South Korea
| | - Jeong-Hwi Cho
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon 200-701, South Korea
| | - Joon Ha Park
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon 200-701, South Korea
| | - Ji Hyeon Ahn
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon 200-701, South Korea
| | - Bai Hui Chen
- Department of Physiology, College of Medicine and Institute of Neurodegeneration and Neuroregeneration, Hallym University, Chuncheon 200-702, South Korea
| | - Bich-Na Shin
- Department of Physiology, College of Medicine and Institute of Neurodegeneration and Neuroregeneration, Hallym University, Chuncheon 200-702, South Korea
| | - Myoung Cheol Shin
- Department of Emergency Medicine, School of Medicine, Kangwon National University, Chuncheon 200-701, South Korea
| | - Hyun-Jin Tae
- Department of Biomedical Science and Research Institute for Bioscience and Biotechnology, Hallym University, Chuncheon 200-702, South Korea
| | - Young Shin Cho
- Department of Emergency Medicine, School of Medicine, Kangwon National University, Chuncheon 200-701, South Korea; Department of Emergency Medicine, Seoul Hospital, College of Medicine, Sooncheonhyang University, Seoul 140-743, South Korea
| | - Yun Lyul Lee
- Department of Physiology, College of Medicine and Institute of Neurodegeneration and Neuroregeneration, Hallym University, Chuncheon 200-702, South Korea
| | - Young-Myeong Kim
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon 200-701, South Korea
| | - Moo-Ho Won
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon 200-701, South Korea.
| | - Jae-Chul Lee
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon 200-701, South Korea.
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15
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Park JH, Lee CH, Kim IH, Ahn JH, Cho JH, Yan BC, Lee JC, Lee TH, Seo JY, Cho JH, Won MH, Kang IJ. Time-course changes in immunoreactivities of glucokinase and glucokinase regulatory protein in the gerbil hippocampus following transient cerebral ischemia. Neurochem Res 2013; 38:2640-9. [PMID: 24146201 DOI: 10.1007/s11064-013-1182-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 10/09/2013] [Accepted: 10/14/2013] [Indexed: 11/29/2022]
Abstract
Glucose is a main energy source for normal brain functions. Glucokinase (GK) plays an important role in glucose metabolism as a glucose sensor, and GK activity is modulated by glucokinase regulatory protein (GKRP). In this study, we examined the changes of GK and GKRP immunoreactivities in the gerbil hippocampus after 5 min of transient global cerebral ischemia. In the sham-operated-group, GK and GKRP immunoreactivities were easily detected in the pyramidal neurons of the stratum pyramidale of the hippocampus. GK and GKRP immunoreactivities in the pyramidal neurons were distinctively decreased in the hippocampal CA1 region (CA), not CA2/3, 3 days after ischemia-reperfusion (I-R). Five days after I-R, GK and GKRP immunoreactivities were hardly detected in the CA1, not CA2/3, pyramidal neurons; however, at this point in time, GK and GKRP immunoreactivities were newly expressed in astrocytes, not microglia, in the ischemic CA1. In brief, GK and GKRP immunoreactivities are changed in pyramidal neurons and newly expressed in astrocytes in the ischemic CA1 after transient cerebral ischemia. These indicate that changes of GK and GKRP expression may be related to the ischemia-induced neuronal damage/death.
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Affiliation(s)
- Joon Ha Park
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, 200-701, South Korea
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