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Zhang XL, Du WH, Qian SX, Lu XD, Yu X, Fang HL, Dong JL, Song M, Sun YY, Wu XQ, Shen YF, Hao YN, Shen MH, Zhou BQ, Wang YP, Xu CY, Jin XC. Glial growth factor 2 treatment alleviates ischemia and reperfusion-damaged integrity of the blood-brain barrier through decreasing Mfsd2a/caveolin-1-mediated transcellular and Pdlim5/YAP/TAZ-mediated paracellular permeability. Acta Pharmacol Sin 2024:10.1038/s41401-024-01323-7. [PMID: 38902501 DOI: 10.1038/s41401-024-01323-7] [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: 01/16/2024] [Accepted: 05/24/2024] [Indexed: 06/22/2024] Open
Abstract
The impairment of blood-brain barrier (BBB) integrity is the pathological basis of hemorrhage transformation and vasogenic edema following thrombolysis and endovascular therapy. There is no approved drug in the clinic to reduce BBB damage after acute ischemic stroke (AIS). Glial growth factor 2 (GGF2), a recombinant version of neuregulin-1β that can stimulates glial cell proliferation and differentiation, has been shown to alleviate free radical release from activated microglial cells. We previously found that activated microglia and proinflammatory factors could disrupt BBB after AIS. In this study we investigated the effects of GGF2 on AIS-induced BBB damage as well as the underlying mechanisms. Mouse middle cerebral artery occlusion model was established: mice received a 90-min ischemia and 22.5 h reperfusion (I/R), and were treated with GGF2 (2.5, 12.5, 50 ng/kg, i.v.) before the reperfusion. We showed that GGF2 treatment dose-dependently decreased I/R-induced BBB damage detected by Evans blue (EB) and immunoglobulin G (IgG) leakage, and tight junction protein occludin degradation. In addition, we found that GGF2 dose-dependently reversed AIS-induced upregulation of vesicular transcytosis increase, caveolin-1 (Cav-1) as well as downregulation of major facilitator superfamily domain containing 2a (Mfsd2a). Moreover, GGF2 decreased I/R-induced upregulation of PDZ and LIM domain protein 5 (Pdlim5), an adaptor protein that played an important role in BBB damage after AIS. In addition, GGF2 significantly alleviated I/R-induced reduction of YAP and TAZ, microglial cell activation and upregulation of inflammatory factors. Together, these results demonstrate that GGF2 treatment alleviates the I/R-compromised integrity of BBB by inhibiting Mfsd2a/Cav-1-mediated transcellular permeability and Pdlim5/YAP/TAZ-mediated paracellular permeability.
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Affiliation(s)
- Xiao-Ling Zhang
- Department of Neurology, the Second Affiliated Hospital of Jiaxing University, Jiaxing, 314033, China
| | - Wei-Hong Du
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Department of Histology and Embryology, School of Basic Medical Sciences, Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, 100069, China
| | - Shu-Xia Qian
- Department of Neurology, the Second Affiliated Hospital of Jiaxing University, Jiaxing, 314033, China
| | - Xu-Dong Lu
- Department of Neurology, the Second Affiliated Hospital of Jiaxing University, Jiaxing, 314033, China
| | - Xin Yu
- Department of Neurology, Bengbu Medical College, Bengbu, 233030, China
| | - Hai-Lun Fang
- Department of Neurology, Bengbu Medical College, Bengbu, 233030, China
| | - Jia-Li Dong
- Institute of Neuroscience, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China
| | - Min Song
- Institute of Neuroscience, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China
| | - Yan-Yun Sun
- Institute of Neuroscience, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China
| | - Xiao-Qiang Wu
- Department of Neurology, the Second Affiliated Hospital of Jiaxing University, Jiaxing, 314033, China
| | - Yu-Fei Shen
- Department of Neurology, the Second Affiliated Hospital of Jiaxing University, Jiaxing, 314033, China
| | - Ya-Nan Hao
- Department of Neurology, the Second Affiliated Hospital of Jiaxing University, Jiaxing, 314033, China
| | - Min-Hui Shen
- Department of Neurology, the Second Affiliated Hospital of Jiaxing University, Jiaxing, 314033, China
| | - Bei-Qun Zhou
- Department of Neurology, the Second Affiliated Hospital of Jiaxing University, Jiaxing, 314033, China
| | - Yan-Ping Wang
- Department of Neurology, the Second Affiliated Hospital of Jiaxing University, Jiaxing, 314033, China.
| | - Cong-Ying Xu
- Department of Neurology, the Second Affiliated Hospital of Jiaxing University, Jiaxing, 314033, China.
| | - Xin-Chun Jin
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Department of Histology and Embryology, School of Basic Medical Sciences, Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, 100069, China.
- Institute of Neuroscience, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China.
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Li B, Wu J, Cao D, Cao C, Zhang J, Li X, Li H, Shen H, Yu Z. ERBB1 alleviates secondary brain injury induced by experimental intracerebral hemorrhage in rats by modulating neuronal death via PLC-γ/PKC pathway. CNS Neurosci Ther 2024; 30:e14679. [PMID: 38528842 PMCID: PMC10964039 DOI: 10.1111/cns.14679] [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: 11/20/2023] [Revised: 02/21/2024] [Accepted: 03/04/2024] [Indexed: 03/27/2024] Open
Abstract
AIMS Intracerebral hemorrhage (ICH) is a disease with high rates of disability and mortality. The role of epidermal growth factor receptor 1 (ERBB1) in ICH was elucidated in this study. METHODS ICH model was constructed by injecting autologous arterial blood into the right basal ganglia. The protein level of ERBB1 was detected by western blot analysis. To up- and downregulation of ERBB1 in rats, intraventricular injection of a lentivirus overexpression vector of ERBB1 and AG1478 (a specific inhibitor of ERBB1) was used. The cell apoptosis, neuronal loss, and pro-inflammatory cytokines were assessed by TUNEL, Nissl staining, and ELISA. Meanwhile, behavioral cognitive impairment of ICH rats was evaluated after ERBB1-targeted interventions. RESULTS ERBB1 increased significantly in brain tissue of ICH rats. Overexpression of ERBB1 remarkably reduced cell apoptosis and neuronal loss induced by ICH, as well as pro-inflammatory cytokines and oxidative stress. Meanwhile, the behavioral and cognitive impairment of ICH rats were alleviated after upregulation of ERBB1; however, the secondary brain injury (SBI) was aggravated by AG1478 treatment. Furthermore, the upregulation of PLC-γ and PKC in ICH rats was reversed by AG1478 treatment. CONCLUSIONS ERBB1 can improve SBI and has a neuroprotective effect in experimental ICH rats via PLC-γ/PKC pathway.
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Affiliation(s)
- Bing Li
- Department of Neurosurgery & Brain and Nerve Research LaboratoryThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina
- Department of Neurosurgery, Yancheng City No. 1 People's Hospital, Yancheng First HospitalAffiliated Hospital of Nanjing University Medical SchoolYanchengJiangsu ProvinceChina
| | - Jiang Wu
- Department of Neurosurgery & Brain and Nerve Research LaboratoryThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina
| | - Demao Cao
- Department of Neurosurgery & Brain and Nerve Research LaboratoryThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina
- Department of NeurosurgeryThe Affiliated Hospital of Yangzhou UniversityYangzhouJiangsu ProvinceChina
| | - Cheng Cao
- Department of Neurosurgery & Brain and Nerve Research LaboratoryThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina
- Department of Neurocritical Intensive Care UnitJiangyin Clinical College of Xuzhou Medical CollegeJiangyinJiangsu ProvinceChina
| | - Juyi Zhang
- Department of Neurosurgery & Brain and Nerve Research LaboratoryThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina
| | - Xiang Li
- Department of Neurosurgery & Brain and Nerve Research LaboratoryThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina
| | - Haiying Li
- Department of Neurosurgery & Brain and Nerve Research LaboratoryThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina
| | - Haitao Shen
- Department of Neurosurgery & Brain and Nerve Research LaboratoryThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina
| | - Zhengquan Yu
- Department of Neurosurgery & Brain and Nerve Research LaboratoryThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina
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Deng A, Wang S, Qin J, Yang P, Shen S, Zhou H, Chen X. ErbB4 processing is involved in OGD/R induced neuron injury. J Stroke Cerebrovasc Dis 2023; 32:107373. [PMID: 37734179 DOI: 10.1016/j.jstrokecerebrovasdis.2023.107373] [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: 05/22/2023] [Revised: 09/08/2023] [Accepted: 09/13/2023] [Indexed: 09/23/2023] Open
Abstract
OBJECTIVE Our previous study found that ErbB4 gene expression was changed after oxygen-glucose deprivation/reperfusion (OGD/R). However, the exact role and mechanism of ErbB4 in brain ischemia are largely unknown. In this study, we explored the protective effects of ErbB4 and its possible mechanism after OGD/R. METHODS Cerebral ischemia/reperfusion (I/R) injury model was established in vitro and in vivo. Cell viability, apoptosis, and ROS production were measured by MTT, TUNEL, and fluorescent probe 2', 7'-dichlorofluorescein diacetate (DCFH-DA). Infarct size was evaluated by TTC. We performed bioinformatics analyses to screen for novel key genes involved in ErbB4 changes. RNA-Seq was used to transcriptome analysis. RNA and protein expression were detected by quantitative RT‒PCR and western bloting. RESULTS The expression of 80-kDa ErbB4 decreased after cerebral I/R injury in vitro and in vivo. Co-expression network analysis revealed that ErbB4 expression was correlated with the changes in Adrb1, Adrb2, Ldlr, and Dab2. Quantitative RT‒PCR revealed that the mRNA expression levels of Adrb1, Adrb2, and Dab2 were upregulated, and that of Ldlr was decreased after OGD/R. Activation of ErbB4 expression by neuregulin 1 (NRG1) significantly promoted cell survival, attenuated hippocampal apoptosis, and decreased ROS production after OGD/R. Furthermore, the elimination of ErbB4 using a specific siRNA reversed these beneficial effects. CONCLUSION Our data revealed the neuroprotective effects of ErbB4 against OGD/R injury, and the action could be related to changes in the ErbB4 membrane-associated fragment and the expression of Adrb1, Adrb2, Ldlr, and Dab2.
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Affiliation(s)
- Aiqing Deng
- Department of Pharmacy, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Shouyan Wang
- Department of Histology and Embryology, Medical School, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Jianxin Qin
- Department of Histology and Embryology, Medical School, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Panpan Yang
- Department of Histology and Embryology, Medical School, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Shaoze Shen
- Department of Histology and Embryology, Medical School, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Hongzhi Zhou
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Xia Chen
- Department of Histology and Embryology, Medical School, Nantong University, Nantong, Jiangsu 226001, People's Republic of China.
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Chen B, Jin W. A comprehensive review of stroke-related signaling pathways and treatment in western medicine and traditional Chinese medicine. Front Neurosci 2023; 17:1200061. [PMID: 37351420 PMCID: PMC10282194 DOI: 10.3389/fnins.2023.1200061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 05/19/2023] [Indexed: 06/24/2023] Open
Abstract
This review provides insight into the complex network of signaling pathways and mechanisms involved in stroke pathophysiology. It summarizes the historical progress of stroke-related signaling pathways, identifying potential interactions between them and emphasizing that stroke is a complex network disease. Of particular interest are the Hippo signaling pathway and ferroptosis signaling pathway, which remain understudied areas of research, and are therefore a focus of the review. The involvement of multiple signaling pathways, including Sonic Hedgehog (SHH), nuclear factor erythroid 2-related factor 2 (Nrf2)/antioxidant response element (ARE), hypoxia-inducible factor-1α (HIF-1α), PI3K/AKT, JAK/STAT, and AMPK in pathophysiological mechanisms such as oxidative stress and apoptosis, highlights the complexity of stroke. The review also delves into the details of traditional Chinese medicine (TCM) therapies such as Rehmanniae and Astragalus, providing an analysis of the recent status of western medicine in the treatment of stroke and the advantages and disadvantages of TCM and western medicine in stroke treatment. The review proposes that since stroke is a network disease, TCM has the potential and advantages of a multi-target and multi-pathway mechanism of action in the treatment of stroke. Therefore, it is suggested that future research should explore more treasures of TCM and develop new therapies from the perspective of stroke as a network disease.
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Affiliation(s)
- Binhao Chen
- The First School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Weifeng Jin
- College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, China
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Neuregulin-1/PI3K signaling effects on oligodendrocyte proliferation, remyelination and behaviors deficit in a male mouse model of ischemic stroke. Exp Neurol 2023; 362:114323. [PMID: 36690057 DOI: 10.1016/j.expneurol.2023.114323] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 01/12/2023] [Accepted: 01/13/2023] [Indexed: 01/22/2023]
Abstract
In this study, we investigated the effect of neuregulin-1 (NRG1) on demyelination and neurological function in an ischemic stroke model, and further explored its neuroprotective mechanisms. Adult male ICR mice underwent photothrombotic ischemia surgery and were injected with NRG1 beginning 30 min after ischemia. Cylinder and grid walking tests were performed to evaluate the forepaw function. In addition, the effect of NRG1 on neuronal damage/death (Cresyl violet, CV), neuronal nuclei (NeuN), nestin, doublecortin (DCX), myelin basic protein (MBP), non-phosphorylated neurofilaments (SMI-32), adenomatous polyposis coli (APC), erythroblastic leukemia viral oncogene homolog (ErbB) 2, 4 and serine-threonine protein kinase (Akt) in cortex were evaluated using immunohistochemistry, immunofluorescence and western blot. The cylinder and grid walking tests exposed that treatment of NRG1 observably regained the forepaw function. NRG1 treatment reduced cerebral infarction, restored forepaw function, promoted proliferation and differentiation of neuron and increased oligodendrogliogenesis. The neuroprotective effect of NRG1 is involved in its activation of PI3K/Akt signaling pathway via ErbB2, as shown by the suppression of the effect of NRG1 by the PI3K inhibitor LY294002. Our results demonstrate that NRG1 is effective in ameliorating the both acute phase neuroprotection and long-term neurological functions via resumption of neuronal proliferation and differentiation and oligodendrogliogenesis in a male mouse model of ischemic stroke.
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Nguyen H, Zhu W, Baltan S. Casein Kinase 2 Signaling in White Matter Stroke. Front Mol Biosci 2022; 9:908521. [PMID: 35911974 PMCID: PMC9325966 DOI: 10.3389/fmolb.2022.908521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 06/21/2022] [Indexed: 11/27/2022] Open
Abstract
The growth of the aging population, together with improved stroke care, has resulted in an increase in stroke survivors and a rise in recurrent events. Axonal injury and white matter (WM) dysfunction are responsible for much of the disability observed after stroke. The mechanisms of WM injury are distinct compared to gray matter and change with age. Therefore, an ideal stroke therapeutic must restore neuronal and axonal function when applied before or after a stroke, and it must also protect across age groups. Casein kinase 2 (CK2), is expressed in the brain, including WM, and is regulated during the development and numerous disease conditions such as cancer and ischemia. CK2 activation in WM mediates ischemic injury by activating the Cdk5 and AKT/GSK3β signaling pathways. Consequently, CK2 inhibition using the small molecule inhibitor CX-4945 (Silmitasertib) correlates with preservation of oligodendrocytes, conservation of axon structure, and axonal mitochondria, leading to improved functional recovery. Remarkably, CK2 inhibition promotes WM function when applied after ischemic injury by specifically regulating the AKT/GSK3β pathways. The blockade of the active conformation of AKT confers post-ischemic protection to young and old WM by preserving mitochondria, implying AKT as a common therapeutic target across age groups. Using a NanoString nCounter miRNA expression profiling, comparative analyses of ischemic WM with or without CX-4945 treatment reveal that miRNAs are expressed at high levels in WM after ischemia, and CX-4945 differentially regulates some of these miRNAs. Therefore, we propose that miRNA regulation may be one of the protective actions of CX-4945 against WM ischemic injury. Silmitasertib is FDA approved and currently in use for cancer and Covid patients; therefore, it is plausible to repurpose CK2 inhibitors for stroke patients.
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Baltan S, Sandau US, Brunet S, Bastian C, Tripathi A, Nguyen H, Liu H, Saugstad JA, Zarnegarnia Y, Dutta R. Identification of miRNAs That Mediate Protective Functions of Anti-Cancer Drugs During White Matter Ischemic Injury. ASN Neuro 2021; 13:17590914211042220. [PMID: 34619990 PMCID: PMC8642107 DOI: 10.1177/17590914211042220] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
We have previously shown that two anti-cancer drugs, CX-4945 and MS-275, protect and preserve white matter (WM) architecture and improve functional recovery in a model of WM ischemic injury. While both compounds promote recovery, CX-4945 is a selective Casein kinase 2 (CK2) inhibitor and MS-275 is a selective Class I histone deacetylase (HDAC) inhibitor. Alterations in microRNAs (miRNAs) mediate some of the protective actions of these drugs. In this study, we aimed to (1) identify miRNAs expressed in mouse optic nerves (MONs); (2) determine which miRNAs are regulated by oxygen glucose deprivation (OGD); and (3) determine the effects of CX-4945 and MS-275 treatment on miRNA expression. RNA isolated from MONs from control and OGD-treated animals with and without CX-4945 or MS-275 treatment were quantified using NanoString nCounter® miRNA expression profiling. Comparative analysis of experimental groups revealed that 12 miRNAs were expressed at high levels in MONs. OGD upregulated five miRNAs (miR-1959, miR-501-3p, miR-146b, miR-201, and miR-335-3p) and downregulated two miRNAs (miR-1937a and miR-1937b) compared to controls. OGD with CX-4945 upregulated miR-1937a and miR-1937b, and downregulated miR-501-3p, miR-200a, miR-1959, and miR-654-3p compared to OGD alone. OGD with MS-275 upregulated miR-2134, miR-2141, miR-2133, miR-34b-5p, miR-153, miR-487b, miR-376b, and downregulated miR-717, miR-190, miR-27a, miR-1959, miR-200a, miR-501-3p, and miR-200c compared to OGD alone. Interestingly, miR-501-3p and miR-1959 were the only miRNAs upregulated by OGD, and downregulated by OGD plus CX-4945 and MS-275. Therefore, we suggest that protective functions of CX-4945 or MS-275 against WM injury maybe mediated, in part, through miRNA expression.
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Affiliation(s)
- Selva Baltan
- Anesthesiology and Perioperative Medicine, Oregon Health and Science University, Portland, OR 97239, USA
- Department of Neurosciences, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
- Selva Baltan, Anesthesiology and Perioperative Medicine, Oregon Health and Science University, Mackenzie Hall 2140A, L459, 3181 S.W. Sam Jackson Park Rd., Portland, OR 97239, USA.
| | - Ursula S. Sandau
- Anesthesiology and Perioperative Medicine, Oregon Health and Science University, Portland, OR 97239, USA
| | - Sylvain Brunet
- Department of Neurosciences, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
| | - Chinthasagar Bastian
- Department of Neurosciences, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
| | - Ajai Tripathi
- Department of Neurosciences, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
| | - Hung Nguyen
- Anesthesiology and Perioperative Medicine, Oregon Health and Science University, Portland, OR 97239, USA
| | - Helen Liu
- Anesthesiology and Perioperative Medicine, Oregon Health and Science University, Portland, OR 97239, USA
| | - Julie A. Saugstad
- Anesthesiology and Perioperative Medicine, Oregon Health and Science University, Portland, OR 97239, USA
| | - Yalda Zarnegarnia
- Anesthesiology and Perioperative Medicine, Oregon Health and Science University, Portland, OR 97239, USA
| | - Ranjan Dutta
- Department of Neurosciences, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
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Yoo JY, Kim HB, Yoo SY, Yoo HI, Song DY, Baik TK, Lee JH, Woo RS. Neuregulin 1/ErbB4 signaling attenuates neuronal cell damage under oxygen-glucose deprivation in primary hippocampal neurons. Anat Cell Biol 2019; 52:462-468. [PMID: 31949986 PMCID: PMC6952697 DOI: 10.5115/acb.19.210] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 10/29/2019] [Accepted: 11/01/2019] [Indexed: 12/25/2022] Open
Abstract
The hippocampus is one of the most important brain areas of cognition. This region is particularly sensitive to hypoxia and ischemia. Neuregulin-1 (NRG1) has been shown to be able to protect against focal cerebral ischemia. The aim of the present study was to investigate the neuroprotective effect of NRG1 in primary hippocampal neurons and its underlying mechanism. Our data showed oxygen-glucose deprivation (OGD)-induced cytotoxicity and overexpression of ErbB4 in primary hippocampal neurons. Moreover, pretreatment with NRG1 could inhibit OGD-induced overexpression of ErbB4. In addition, NRG1 significantly attenuated neuronal death induced by OGD. The neuroprotective effect of NRG1 was blocked in ischemic neurons after pretreatment with AG1478, an inhibitor of ErbB4, but not after pretreatment with AG879, an inhibitor of ErbB2. These results indicate an important role of ErbB4 in NRG1-mediated neuroprotection, suggesting that endogenous ErbB4 might serve as a valuable therapeutic target for treating global cerebral ischemia.
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Affiliation(s)
- Ji-Young Yoo
- Department of Anatomy and Neuroscience, Eulji University College of Medicine, Daejeon, Korea
| | - Han-Byeol Kim
- Department of Anatomy and Neuroscience, Eulji University College of Medicine, Daejeon, Korea
| | - Seung-Yeon Yoo
- Department of Anatomy and Neuroscience, Eulji University College of Medicine, Daejeon, Korea
| | - Hong-Il Yoo
- Department of Anatomy and Neuroscience, Eulji University College of Medicine, Daejeon, Korea
| | - Dae-Yong Song
- Department of Anatomy and Neuroscience, Eulji University College of Medicine, Daejeon, Korea
| | - Tai-Kyoung Baik
- Department of Anatomy and Neuroscience, Eulji University College of Medicine, Daejeon, Korea
| | - Jun-Ho Lee
- Department of Emergency Medical Technology, Daejeon University, Daejeon, Korea
| | - Ran-Sook Woo
- Department of Anatomy and Neuroscience, Eulji University College of Medicine, Daejeon, Korea
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NRG1-ErbB4 signaling promotes functional recovery in a murine model of traumatic brain injury via regulation of GABA release. Exp Brain Res 2019; 237:3351-3362. [PMID: 31720762 DOI: 10.1007/s00221-019-05680-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 09/09/2019] [Indexed: 12/20/2022]
Abstract
Traumatic brain injury (TBI) is a serious health problem in the world. However, little is known about the pathogenesis and molecular mechanisms of TBI. Here, we show that TBI activates neuregulin 1 (NRG1)-ErbB4 signaling, with an increased expression of NRG1 and ErbB4 in the traumatic region. Specifically knocking out ErbB4 in parvalbumin-positive (PV+) interneurons exacerbates motor function deficits in mice after TBI. Consistently, PV-ErbB4-/- mice showed larger necrotic area and more edema when compared with PV-ErbB4+/+ mice. Replenishment of NRG1 through intranasal application of the recombinant protein in PV-ErbB4+/+ mice enhanced neurological function. Moreover, using an in vitro neuronal culture system, we found that NRG1-ErbB4 signaling protects neurons from glutamate-induced death, and such protective effects could be diminished by GABA receptor antagonist. These results indicate that NRG-ErbB4 signaling protects cortical neurons from TBI-induced damage, and such effect is probably mediated by promoting GABA activity. Taken together, these findings unveil a previously unappreciated role for NRG1-ErB4 signaling in preventing neuronal cell death during functional recovery after TBI.
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Ryu S, Lee JM, Bae CA, Moon CE, Cho KO. Therapeutic efficacy of neuregulin 1-expressing human adipose-derived mesenchymal stem cells for ischemic stroke. PLoS One 2019; 14:e0222587. [PMID: 31560696 PMCID: PMC6764745 DOI: 10.1371/journal.pone.0222587] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Accepted: 09/02/2019] [Indexed: 12/22/2022] Open
Abstract
Adipose-derived mesenchymal stem cells (AdMSCs) have been reported to ameliorate neurological deficits after acute ischemic stroke. As neuregulin 1 (NRG1, or heregulin 1), a growth factor with versatile functions in the central nervous system, has demonstrated protective effects against ischemic brain injuries, we have generated NRG1-overexpressing AdMSCs in order to investigate whether NRG1-AdMSCs could enhance therapeutic benefits of AdMSCs in ischemic stroke. After AdMSCs were infected with adenoviral NRG1, increased NRG1 secretion in NRG1-AdMSCs was confirmed with ELISA. At 1 d after ischemic stroke that was induced by the occlusion of middle cerebral artery (MCAo) for 60 min in Sprague Dawley (SD) rats, adenoviral NRG1, AdMSCs, NRG1-AdMSCs, or PBS were injected into the striatum and serial neurologic examinations were performed. Administration of NRG1-AdMSCs resulted in significant improvement of functional outcome following stroke compared to AdMSCs- or adenoviral NRG1-treated group, in addition to the reduction in the infarct size evaluated by hematoxylin and eosin staining. When NRG1 expression in the brain was examined by double immunofluorescence to human nuclei (HuNu)/NRG1 and ELISA, NRG1-AdMSCs demonstrated marked increase in NRG1 expression. Moreover, western blot analysis further showed that transplantation of NRG1-AdMSCs significantly increased both endogenous and adenoviral NRG1 expression compared to AdMSCs-treated group. To elucidate molecular mechanisms, NRG1-associated downstream molecules were evaluated by western blot analysis. Expression of ErbB4, a receptor for NRG1, was markedly increased by NRG1-AdMSCs administration, in addition to pMAPK and pAkt, crucial molecules of NRG1-ErbB4 signaling. Taken together, our data suggest that NRG1-AdMSCs can provide excellent therapeutic potential in ischemic stroke by activating NRG1-ErbB4 signaling network.
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Affiliation(s)
- Sun Ryu
- Department of Pharmacology, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Jae-Min Lee
- Department of Pharmacology, College of Medicine, The Catholic University of Korea, Seoul, South Korea
- Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Cheong A. Bae
- Department of Pharmacology, College of Medicine, The Catholic University of Korea, Seoul, South Korea
- Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Chae-Eun Moon
- Department of Pharmacology, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Kyung-Ok Cho
- Department of Pharmacology, College of Medicine, The Catholic University of Korea, Seoul, South Korea
- Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, Seoul, South Korea
- Department of Biomedicine & Health Sciences, College of Medicine, The Catholic University of Korea, Seoul, South Korea
- Institute of Aging and Metabolic Diseases, College of Medicine, The Catholic University of Korea, Seoul, South Korea
- * E-mail:
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Hei Y, Chen R, Mao X, Wang J, Long Q, Liu W. Neuregulin1 attenuates cognitive deficits and hippocampal CA1 neuronal apoptosis partly via ErbB4 receptor in a rat model of chronic cerebral hypoperfusion. Behav Brain Res 2019; 365:141-149. [PMID: 30826297 DOI: 10.1016/j.bbr.2019.02.046] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 02/27/2019] [Accepted: 02/27/2019] [Indexed: 12/15/2022]
Abstract
Neuregulin1 (NRG1) is an effective neuroprotectant. Previously we demonstrated that the expression of hippocampal NRG1/ErbB4 gradually decreased and correlates with neuronal apoptosis during chronic cerebral hypoperfusion (CCH). Here we aimed to further investigate the protective role of NRG1 in CCH. AG1478, an ErbB4 inhibitor, was used to explore the involvement of ErbB4 receptors in NRG1's action. Permanent bilateral common carotid artery occlusion (2VO) or sham operation was performed in Sprague-Dawley rats. NRG1 (100 μM) and AG1478 (50 mM) was administered intraventricularly. Eight weeks post-surgery, cognitive impairment was analyzed using Morris water maze (MWM) and radial arm water maze (RAWM) tests, followed by histological assessment of the survival and apoptosis of hippocampal CA1 neurons using NeuN and TUNEL immunostaining respectively. Expression of apoptosis-related proteins and ErbB4 activation (pErbB4/ErbB4) was evaluated by Western blotting. The results showed that NRG1 significantly improved the performances in MWM (spatial learning and memory) and RAWM (spatial working and reference memory), attenuated hippocampal CA1 neuronal loss and apoptosis, upregulated the expression of pErbB4/ErbB4 and the anti-apoptotic protein Bcl-2, and downregulated the expression of pro-apoptotic proteins of Cleaved (Cl)-caspase3 and Bax. In addition, the protective effects of NRG1 could be partly abolished by AG1478. Taken together, our study suggested that NRG1 ameliorates cognitive impairment and neuronal apoptosis partly via ErbB4 receptors in rats with CCH.
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Affiliation(s)
- Yue Hei
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, No.17 Changle West Road, Xi'an, 710032, PR China
| | - Rong Chen
- Department of Neurology, Xijing Hospital, Fourth Military Medical University, No.17 Changle West Road, Xi'an, 710032, PR China
| | - Xingang Mao
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, No.17 Changle West Road, Xi'an, 710032, PR China
| | - Jiancai Wang
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, No.17 Changle West Road, Xi'an, 710032, PR China
| | - Qianfa Long
- Department of Neurosurgery, Institute of Mini-invasive Neurosurgery and Translational Medicine, Xi'an Central Hospital, No. 185 Houzai Gate of North Street, Xi'an, 710003, PR China
| | - Weiping Liu
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, No.17 Changle West Road, Xi'an, 710032, PR China.
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12
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Missaoui N, Landolsi H, Mestiri S, Essakly A, Abdessayed N, Hmissa S, Mokni M, Yacoubi MT. Immunohistochemical analysis of c-erbB-2, Bcl-2, p53, p21 WAF1/Cip1, p63 and Ki-67 expression in hydatidiform moles. Pathol Res Pract 2018; 215:446-452. [PMID: 30558966 DOI: 10.1016/j.prp.2018.12.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 11/23/2018] [Accepted: 12/11/2018] [Indexed: 01/02/2023]
Abstract
Hydatidiform moles (HM) are characterized by an abnormal proliferating trophoblast with a potential for a malignant transformation. Similar to other human tumors, trophoblastic pathogenesis is likely a multistep process involving several molecular and genetic alterations. The study was performed to investigate the expression patterns of c-erbB-2 and Bcl-2 oncoproteins, p53, p21WAF1/CIP1 and p63 tumor suppressor proteins and Ki-67 cell proliferation marker in HM. We conducted a retrospective study of 220 gestational products, including 39 hydropic abortions (HA), 41 partial HM (PHM) and 140 complete HM (CHM). The expression of c-erbB-2, Bcl-2, p53, p21WAF1/CIP1, p63 and Ki-67 was investigated by immunohistochemistry on archival tissues. c-erbB-2 expression was observed in three PHM and 10 CHM. Bcl-2 immunostaining was significantly higher in PHM (61%) and CHM (70.7%) compared with HA (7.7%, p = 0.001 and p < 0.0001, respectively). p53 expression was stronger in CHM (73.6%) compared with PHM (24.4%, p < 0.0001) and HA (12.8%, p < 0.0001). p21WAF1/CIP1 staining was observed as well in molar and non-molar gestations (p > 0.05). p63 immunoexpression was significantly described in CHM (85.7%) and PHM (78%) compared with HA (10.2%, p < 0.0001 and p = 0.0001, respectively). Ki-67 was significantly expressed in CHM (72.1%) compared with HA (46.2%, p = 0.005). Altered expression of Bcl-2, p53, p63 and Ki-67 reflects the HM pathological development. Immunohistochemical analysis is beneficial to recognize the HM molecular and pathogenic mechanisms. Furthermore, it could serve as a useful adjunct to conventional methods for refining HM diagnosis.
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Affiliation(s)
- Nabiha Missaoui
- Research Unit UR14ES17, Cancer Epidemiology and Cytopathology in Tunisian Center, Medicine Faculty of Sousse, University of Sousse, 4000 Sousse, Tunisia; Faculty of Sciences and Techniques, Sidi Bouzid, Kairouan University, Tunisia; Pathology Department, Farhet Hached Hospital, 4000 Sousse, Tunisia.
| | - Hanene Landolsi
- Research Unit UR14ES17, Cancer Epidemiology and Cytopathology in Tunisian Center, Medicine Faculty of Sousse, University of Sousse, 4000 Sousse, Tunisia
| | - Sarra Mestiri
- Pathology Department, Farhet Hached Hospital, 4000 Sousse, Tunisia; Medicine Faculty of Sousse, University of Sousse, 4000 Sousse, Tunisia
| | - Ahlem Essakly
- Medicine Faculty of Sousse, University of Sousse, 4000 Sousse, Tunisia
| | - Nihed Abdessayed
- Pathology Department, Farhet Hached Hospital, 4000 Sousse, Tunisia; Medicine Faculty of Sousse, University of Sousse, 4000 Sousse, Tunisia
| | - Sihem Hmissa
- Research Unit UR14ES17, Cancer Epidemiology and Cytopathology in Tunisian Center, Medicine Faculty of Sousse, University of Sousse, 4000 Sousse, Tunisia; Pathology Department, Farhet Hached Hospital, 4000 Sousse, Tunisia; Medicine Faculty of Sousse, University of Sousse, 4000 Sousse, Tunisia
| | - Moncef Mokni
- Pathology Department, Farhet Hached Hospital, 4000 Sousse, Tunisia; Medicine Faculty of Sousse, University of Sousse, 4000 Sousse, Tunisia
| | - Mohamed Tahar Yacoubi
- Pathology Department, Farhet Hached Hospital, 4000 Sousse, Tunisia; Medicine Faculty of Sousse, University of Sousse, 4000 Sousse, Tunisia
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13
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Zhang R, Liu C, Ji Y, Teng L, Guo Y. Neuregulin-1β Plays a Neuroprotective Role by Inhibiting the Cdk5 Signaling Pathway after Cerebral Ischemia-Reperfusion Injury in Rats. J Mol Neurosci 2018; 66:261-272. [PMID: 30206770 DOI: 10.1007/s12031-018-1166-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 08/28/2018] [Indexed: 01/24/2023]
Abstract
This study investigated the effects of neuregulin-1β (NRG1β) after middle cerebral artery occlusion/reperfusion (MCAO/R) in rats to evaluate whether they occur via the cyclin-dependent kinase (Cdk)5 signaling pathway. One hundred adult male Wistar rats were randomly divided into sham, MCAO/R, treatment (NRG1β), inhibitor (roscovitine; Ros), and inhibitor + treatment (Ros + NRG1β) groups. The MCAO/R model was established using the intraluminal thread method. The neurobehavioral function was evaluated by the modified neurological severity score (mNSS). The cerebral infarction volume (CIV) was measured by triphenyl tetrazolium chloride (TTC) staining. Morphological changes were observed by hematoxylin-eosin (HE) staining. The apoptotic cell index (ACI) was detected by the terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL) assay. Immunohistochemistry and Western blotting were performed to detect the expression of calpain 1, p35/p25 (regulatory binding partners of Cdk5), Cdk5, and p-Tau in neurons. The neuronal morphology in the MCAO/R, NRG1β, Ros + NRG1β, and Ros groups differed compared to the sham group; the mNSS, CIV, ACI, and the expression of calpain 1, p35/p25, Cdk5, and p-Tau were significantly increased in all four groups (P < 0.05). In the NRG1β, Ros and Ros + NRG1β groups, the neuronal morphology was significantly improved compared to the MCAO/R group, as were the mNSS, CIV, and ACI. The levels of calpain 1, p35/p25, and p-Tau were decreased compared with the MCAO/R group (P < 0.05), while the Cdk5 expression was not significantly different (P > 0.05). NRG1β may exert neuroprotective effects by inhibiting the expression of calpain 1, p35/p25, and p-Tau after cerebral ischemia-reperfusion injury.
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Affiliation(s)
- Rui Zhang
- Department of ICU, Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Cui Liu
- Department Traumic Surgery, Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Yaqing Ji
- Institute of Integrative Medicine, Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Lei Teng
- Department of Biology, Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Yunliang Guo
- Institute of Cerebrovascular Diseases, Affiliated Hospital of Qingdao University, Shandong Provincial Collaborative Innovation Center for Neurodegenerative Disorders, Qingdao, 266003, China.
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Pankratova S, Klingelhofer J, Dmytriyeva O, Owczarek S, Renziehausen A, Syed N, Porter AE, Dexter DT, Kiryushko D. The S100A4 Protein Signals through the ErbB4 Receptor to Promote Neuronal Survival. Theranostics 2018; 8:3977-3990. [PMID: 30083275 PMCID: PMC6071530 DOI: 10.7150/thno.22274] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 04/10/2018] [Indexed: 12/21/2022] Open
Abstract
Understanding the mechanisms of neurodegeneration is crucial for development of therapies to treat neurological disorders. S100 proteins are extensively expressed in the injured brain but S100's role and signalling in neural cells remain elusive. We recently demonstrated that the S100A4 protein protects neurons in brain injury and designed S100A4-derived peptides mimicking its beneficial effects. Here we show that neuroprotection by S100A4 involves the growth factor family receptor ErbB4 and its ligand Neuregulin 1 (NRG), key regulators of neuronal plasticity and implicated in multiple brain pathologies. The neuroprotective effect of S100A4 depends on ErbB4 expression and the ErbB4 signalling partners ErbB2/Akt, and is reduced by functional blockade of NRG/ErbB4 in cell models of neurodegeneration. We also detect binding of S100A4 with ErbB1 (EGFR) and ErbB3. S100A4-derived peptides interact with, and signal through ErbB, are neuroprotective in primary and immortalized dopaminergic neurons, and do not affect cell proliferation/motility - features which make them promising as potential neuroprotectants. Our data suggest that the S100-ErbB axis may be an important mechanism regulating neuronal survival and plasticity.
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15
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Hei Y, Chen R, Yi X, Wei L, Long Q, Liu W. The Expression of Hippocampal NRG1/ErbB4 Correlates With Neuronal Apoptosis, but Not With Glial Activation During Chronic Cerebral Hypoperfusion. Front Aging Neurosci 2018; 10:149. [PMID: 29875654 PMCID: PMC5974051 DOI: 10.3389/fnagi.2018.00149] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Accepted: 05/02/2018] [Indexed: 12/13/2022] Open
Abstract
Permanent bilateral common carotid occlusion (2VO) is well-established to investigate the chronic cerebral hypoperfusion (CCH)-induced cognitive deficits. Besides, previous studies suggested that disturbance of Neuregulin1 (NRG1)/ErbB4 signaling is associated with cognitive impairments, as well as neuronal apoptosis and neuroinflammation in CNS. However, the expression pattern of hippocampal NRG1/ErbB4 has not been systematically investigated during CCH. Here, we aim to investigate the temporal changes of hippocampal NRG1/ErbB4 during CCH and their possible relationship with neuronal apoptosis and glial activation. Morris water maze (MWM) and Radial arm water maze (RAWM) tests were used to analyze cognitive impairment in 2VO rats at 28 days post-surgery, and Enzyme-Linked Immunosorbent Assay (ELISA), western blotting and immunostaining were performed at different time points (24 h, 7 days, 14 days, 28 days) to detect the expression pattern of NRG1/ErbB4 and the distribution of ErbB4. Neuronal nuclei (NeuN), NeuN/TUNEL, Iba1 and GFAP immunostaining and caspase activity in hippocampal CA1 subarea were assessed during CCH as well. We found that the expression of NRG1 and phosphorylated ErbB4 (pErbB4)/ErbB4 changed in a time-dependent manner (up-regulated in the acute phase and then decreased in the chronic phase of CCH). Besides, ErbB4-expressed neurons and selective types of GABAergic cells decreased after CCH, but the distribution pattern of ErbB4 remained unchanged. In addition, the expression of hippocampal NRG1/ErbB4 positively correlated with the level of neuronal apoptosis (both NeuN/TUNEL immunostaining and caspase-3 activity), but not with glial activation according to Pearson’s correlation. These findings indicated that hippocampal NRG1/ErbB4 may be involved in the pathogenesis of CCH, especially neuronal apoptosis during CCH.
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Affiliation(s)
- Yue Hei
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Rong Chen
- Department of Neurology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Xicai Yi
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Lizhou Wei
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Qianfa Long
- Department of Neurosurgery, Institute of Mini-invasive Neurosurgery and Translational Medicine, Xi'an Central Hospital, Xi'an, China
| | - Weiping Liu
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
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16
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Gu N, Ge K, Hao C, Ji Y, Li H, Guo Y. Neuregulin1β Effects on Brain Tissue via ERK5-Dependent MAPK Pathway in a Rat Model of Cerebral Ischemia-Reperfusion Injury. J Mol Neurosci 2017; 61:607-616. [PMID: 28265860 DOI: 10.1007/s12031-017-0902-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 02/16/2017] [Indexed: 11/29/2022]
Abstract
Neuregulin1β (NRG1β), a member of the excitomotor of tyrosine kinase receptor (erbB) family, was recently shown to play a neuroprotective role in cerebral ischemia-reperfusion injury. The present study analyzed the effects and its possible signaling pathway of NRG1β on brain tissues after cerebral ischemia-reperfusion injury. A focal cerebral ischemic model was established by inserting a monofilament thread to achieve middle cerebral artery occlusion, followed by an NRG1β injection via the internal carotid artery. NRG1β injection resulted in significantly improved neurobehavioral activity according to the modified neurological severity score test. Tetrazolium chloridestaining revealed a smaller cerebral infarction volume; hematoxylin-eosin staining and transmission electron microscopy showed significantly alleviated neurodegeneration in the middle cerebral artery occlusion rats. Moreover, expression of phosphorylated MEK5, phosphorylated ERK5, and phosphorylated MEK2C increased after NRG1β treatment, and the neuroprotective effect of NRG1β was attenuated by an injection of the MEK5 inhibitor, BIX02189. Results from the present study demonstrate that NRG1β provides neuroprotection following cerebral ischemia-reperfusion injury via the ERK5-dependent MAPK pathway.
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Affiliation(s)
- Ning Gu
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China.,Institute of Integrated Medicine, Qingdao University Medical College, Qingdao, Shandong, China
| | - Keli Ge
- Institute of Integrated Medicine, Qingdao University Medical College, Qingdao, Shandong, China
| | - Cui Hao
- Institute of Cerebrovascular Diseases, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Yaqing Ji
- Institute of Integrated Medicine, Qingdao University Medical College, Qingdao, Shandong, China
| | - Hongyun Li
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China.
| | - Yunliang Guo
- Institute of Cerebrovascular Diseases, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China.
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Tian C, Li Z, Yang Z, Huang Q, Liu J, Hong B. Plasma MicroRNA-16 Is a Biomarker for Diagnosis, Stratification, and Prognosis of Hyperacute Cerebral Infarction. PLoS One 2016; 11:e0166688. [PMID: 27846323 PMCID: PMC5112925 DOI: 10.1371/journal.pone.0166688] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 11/02/2016] [Indexed: 12/11/2022] Open
Abstract
Indices for the diagnosis of hyperacute cerebral infarction (HACI) and the prediction of prognosis are essential for timely and appropriate management. MicroRNAs (miRNAs) that regulate gene expression following stroke have potential use as prognostic markers of HACI. Here, we explored whether concentrations of circulating miRNAs correlate with clinical outcomes and thus form a system of stroke stratification. Plasma samples from patients with HACI (n = 7) and age-matched healthy volunteers (HVT, n = 4) were screened by microarray to find differentially expressed miRNAs, some of which were further verified by quantitative reverse transcription polymerase chain reaction (qRT-PCR) (HACI:HVT = 33:23). The target genes of the miRNAs with verified differential expression were investigated by GO and KEEG analyses. Using the TOAST (OCSP) criteria and the 3-month modified Rankin Score (mRS), relationships among the expression patterns of specific miRNAs, stroke stratification, and clinical prognosis were determined. The microarray analysis revealed 12 differentially expressed miRNAs. Among seven selected miRNAs verified with qRT-PCR, miR-16 expression in the HACI group was the most significantly different from the HVT group (P < 0.01). Bioinformatics analysis showed that the potential target genes of miR-16 were mainly involved in programmed cell death and the p53 signaling pathways. Receiver operating characteristic (ROC) analysis showed that the area under the curve (AUC) of miR-16 was 0.775 (sensitivity 69.7% and specificity 87%) and 0.952 (sensitivity 100% and specificity 91.3%) in overall patients and patients with large artery atherosclerosis (LAAS), respectively. Elevated miR-16 expression was associated with the stroke subtype of LAAS, total anterior circulation infarction, partial anterior circulation infarction, and poor prognosis (P < 0.05). A diagnostic method based on rapid measurement of plasma miR-16 has the potential to identify hyperacute cerebral infarction with LAAS with high sensitivity and specificity, which would inform and improve early treatment decisions and disease management.
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Affiliation(s)
- Chunou Tian
- Department of Neurosurgery, Changhai Hospital, Second Military Medical University, Shanghai, China
- Department of Neurosurgery, Number 422 Hospital of PLA, Zhanjiang, Guangdong, China
| | - Zifu Li
- Department of Neurosurgery, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Zhigang Yang
- Department of Neurosurgery, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Qinghai Huang
- Department of Neurosurgery, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Jianmin Liu
- Department of Neurosurgery, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Bo Hong
- Department of Neurosurgery, Changhai Hospital, Second Military Medical University, Shanghai, China
- * E-mail:
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18
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Xiao W, Dong X, Zhao H, Han S, Nie R, Zhang X, An R. Expression of MIF and c-erbB-2 in endometrial cancer. Mol Med Rep 2016; 13:3828-34. [PMID: 26985869 PMCID: PMC4838132 DOI: 10.3892/mmr.2016.4992] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Accepted: 12/08/2015] [Indexed: 12/03/2022] Open
Abstract
The aim of the present study was to investigate the expression of c-erbB-2 and macrophage migration inhibitory factor (MIF) in endometrial cancer and to elucidate the significance of the early diagnosis and prognosis of endometrial cancer. The gene copy number of c-erbB-2 and MIF was characterized by reverse transcription quantitative polymerase chain reaction and the reactivity was assessed by immunohistochemistry in 70 patients using a polyclonal antibody, and evaluated semiquantitatively according to the percentage of cells demonstrating membranous or diffuse cytoplasmic staining. A correlation between age, tumor stage, grade, myometrial invasion and lymph node metastasis was observed. The mRNA expression of c-erbB-2 and MIF was high in endometrial carcinoma. The positive expression rate of MIF protein in normal endometrium, atypical hyperplasia and endometrial carcinoma significantly increased along with the degree of aggravation of the disease by 20 (3/15), 45 (9/20) and 70% (35/50), respectively. The positive expression of MIF and c-erbB-2 was highest in endometrial cancer and a significantly higher level of protein was observed in tumors at stage I, stage G1, with a depth of myometrial invasion <0.4 cm and no lymph node metastasis. The protein expression of c-erbB-2 in endometrial cancer was higher in tumors at the G2-3 phase, clinical stage III–IV, lymph node metastasis, and had no association with the depth of myometrial invasion and age. MIF and c-erbB-2 were correlated with the occurrence and the development of endometrial cancer, and thus can be used for the early diagnosis and prognosis of endometrial cancer. The present study laid the foundation for identifying new treatments for endometrial cancer.
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Affiliation(s)
- Wei Xiao
- Department of Gynaecology and Obstetrics, The First Affiliated Hospital of Xi'an Jiao Tong University, Xi'an, Shaanxi 710061, P.R. China
| | - Xiujuan Dong
- Department of Gynaecology and Obstetrics, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Honghui Zhao
- Department of Gynaecology and Obstetrics, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Shiyu Han
- Department of Gynaecology and Obstetrics, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Ruixue Nie
- Department of Gynaecology and Obstetrics, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Xiahua Zhang
- Department of Gynaecology and Obstetrics, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Ruifang An
- Department of Gynaecology and Obstetrics, The First Affiliated Hospital of Xi'an Jiao Tong University, Xi'an, Shaanxi 710061, P.R. China
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Dang R, Cai H, Zhang L, Liang D, Lv C, Guo Y, Yang R, Zhu Y, Jiang P. Dysregulation of Neuregulin-1/ErbB signaling in the prefrontal cortex and hippocampus of rats exposed to chronic unpredictable mild stress. Physiol Behav 2015; 154:145-50. [PMID: 26626816 DOI: 10.1016/j.physbeh.2015.11.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 11/23/2015] [Accepted: 11/24/2015] [Indexed: 12/24/2022]
Abstract
Exposure to chronic stress increases the likelihood of developing depression, but the underlying mechanisms remain equivocal. While recent evidence has indicated that Neuregulin-1 (NRG1) and its ErbB receptors play an essential role in neural development and function, and NRG1 has emerged as a novel modulator involved in the response of brain to stress, there is limited evidence concerning the effects of chronic stress exposure on NRG1/ErbB signaling. To fill this critical gap, we examined the protein expression of NRG1 and ErbB receptors in the brain of rats following chronic unpredictable mild stress (CUMS) exposure. After 6weeks of CUMS procedures, the rats were induced to a depression-like state. The stressed rats displayed elevated expression of NRG1 and phosphorylated ErbB4 (pErbB4) in the prefrontal cortex, whereas ErbB2 and pErbB2 were inhibited. In the hippocampus, CUMS also attenuated activation of the both ErbB receptors and suppressed the downstream Akt and ERK phosphorylation. Meanwhile, administration of sertraline enhanced NRG1/ErbB signaling and partly normalized the stress-induced behavioral changes and the disturbances of NRG1/ErbB system in CUMS rats. Combined, our data firstly showed the aberrant changes of NRG1/ErbB system in the brain of the animal model of depression, providing new evidence for the involvement of NRG1/ErbB pathway in the development and treatment of depression.
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Affiliation(s)
- Ruili Dang
- Institute of Clinical Pharmacy & Pharmacology, Jining First People's Hospital, Jining Medical University, Jining 272000, China; Department of Pharmacy, Second Xiangya Hospital, Central South University, Changsha 410010, China
| | - Hualin Cai
- Department of Pharmacy, Second Xiangya Hospital, Central South University, Changsha 410010, China
| | - Ling Zhang
- Institute of Clinical Pharmacy & Pharmacology, Jining First People's Hospital, Jining Medical University, Jining 272000, China
| | - Donglou Liang
- Institute of Clinical Pharmacy & Pharmacology, Jining First People's Hospital, Jining Medical University, Jining 272000, China
| | - Chuanfeng Lv
- Institute of Clinical Pharmacy & Pharmacology, Jining First People's Hospital, Jining Medical University, Jining 272000, China
| | - Yujin Guo
- Institute of Clinical Pharmacy & Pharmacology, Jining First People's Hospital, Jining Medical University, Jining 272000, China.
| | - Ranyao Yang
- Institute of Clinical Pharmacy & Pharmacology, Jining First People's Hospital, Jining Medical University, Jining 272000, China
| | - Yungui Zhu
- Department of Pharmacy, Second Xiangya Hospital, Central South University, Changsha 410010, China
| | - Pei Jiang
- Institute of Clinical Pharmacy & Pharmacology, Jining First People's Hospital, Jining Medical University, Jining 272000, China.
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20
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Guan YF, Wu CY, Fang YY, Zeng YN, Luo ZY, Li SJ, Li XW, Zhu XH, Mei L, Gao TM. Neuregulin 1 protects against ischemic brain injury via ErbB4 receptors by increasing GABAergic transmission. Neuroscience 2015; 307:151-9. [DOI: 10.1016/j.neuroscience.2015.08.047] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 08/20/2015] [Accepted: 08/20/2015] [Indexed: 12/22/2022]
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21
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Lu YM, Gao YP, Tao RR, Liao MH, Huang JY, Wu G, Han F, Li XM. Calpain-Dependent ErbB4 Cleavage Is Involved in Brain Ischemia-Induced Neuronal Death. Mol Neurobiol 2015; 53:2600-9. [DOI: 10.1007/s12035-015-9275-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 06/01/2015] [Indexed: 10/23/2022]
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22
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Mencel M, Nash M, Jacobson C. Neuregulin upregulates microglial α7 nicotinic acetylcholine receptor expression in immortalized cell lines: implications for regulating neuroinflammation. PLoS One 2013; 8:e70338. [PMID: 23936190 PMCID: PMC3728089 DOI: 10.1371/journal.pone.0070338] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 06/21/2013] [Indexed: 11/19/2022] Open
Abstract
Neuregulin, previously known as ARIA, is a signaling protein involved in cell survival, synaptic plasticity, cell communication and differentiation. Neuregulin has also been described as a potent inducer of acetylcholine receptor transcription in muscle and although both neuregulin and acetylcholine have been individually described to have neuroprotective roles, their relationship in the cholinergic anti-inflammatory pathway of the brain has not been examined. Using three cell lines, BV-2, EOC-20 and RAW 264.7, we investigated the role that neuregulin signaling through the Erb family of tyrosine kinases may play in the anti-inflammatory process mediated by the α7 nicotinic acetylcholine receptors. Here we show that ErbB4 is expressed in all of our cell lines and is phosphorylated upon treatment with neuregulin. Neuregulin treatment further increases the expression of α7 nicotinic acetylcholine receptors in the microglial lines tested. Given the central role of α7 nicotinic acetylcholine receptors in regulating system inflammation we analyzed the expression of several pro-inflammatory cytokines in our system. Using ELISAs for TNF-α and IL-6 we show that treatment with NRG can produce a nearly a 33% decrease in the levels of tumor necrosis factor-α secreted by activated microglia and a nearly 88% decrease in IL-6. Given these results we propose a neuroprotective role for neuregulin wherein it modulates the expression of TNF-α and thus inflammation in the CNS via the upregulation of α7 nicotinic acetylcholine receptor expression in microglia in vitro. We suggest that the disregulation of neuregulin expression may be pivotal in neurological disorders characterized by inflammation.
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Affiliation(s)
- Malwina Mencel
- Department of Biology, University of Waterloo, Waterloo, Ontario, Canada.
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Wang V, Chuang TC, Kao MC, Shan DE, Soong BW, Shieh TM. Polymorphic Ala-allele carriers at residue 1170 of HER2 associated with Parkinson's disease. J Neurol Sci 2013; 325:115-9. [DOI: 10.1016/j.jns.2012.12.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2012] [Revised: 12/16/2012] [Accepted: 12/18/2012] [Indexed: 02/06/2023]
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Over-expression of VEGF in marrow stromal cells promotes angiogenesis in rats with cerebral infarction via the synergistic effects of VEGF and Ang-2. ACTA ACUST UNITED AC 2012; 32:724-731. [DOI: 10.1007/s11596-012-1025-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Indexed: 12/25/2022]
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25
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Chen Y, Zhang M, Li Q, Guo Y, Ding W, Wang L, Zhou Z, Chen X. Interfering effect and mechanism of neuregulin on experimental dementia model in rats. Behav Brain Res 2011; 222:321-5. [DOI: 10.1016/j.bbr.2011.03.063] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Revised: 03/24/2011] [Accepted: 03/29/2011] [Indexed: 11/15/2022]
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26
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Effects of Neuregulin on Expression of MMP-9 and NSE in Brain of Ischemia/Reperfusion Rat. J Mol Neurosci 2008; 38:207-15. [DOI: 10.1007/s12031-008-9150-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2008] [Accepted: 09/09/2008] [Indexed: 10/21/2022]
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27
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Li Q, Li Z, Mei Y, Guo Y. Neuregulin attenuated cerebral ischemia-Creperfusion injury via inhibiting apoptosis and upregulating aquaporin-4. Neurosci Lett 2008; 443:155-9. [PMID: 18680785 DOI: 10.1016/j.neulet.2008.07.064] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2008] [Revised: 07/10/2008] [Accepted: 07/23/2008] [Indexed: 11/26/2022]
Abstract
It has been demonstrated that neuregulin-1beta (NRG-1beta) plays a neuroprotective role in cerebral ischemic injury, however, its defined mechanisms and the perfect treatment window are still elusive. Therefore, we established the animal model of MCAO/R to evaluate cerebral damage. As a result, neurological deficit scores were increased, and a small infarction focus could be seen in ischemic cortex in the control group at ischemic 0.5h/reperfusion 24h. With the duration of ischemia time, deficit scores and infarction sizes obviously elevated in the control group. A large number of positive-apoptotic cells were widespread in the ischemic cortex. Simultaneously, the expression of AQP-4 mRNA and its protein increased. NRG-1beta significantly improved neurological function, decreased the infarction volume, and elevated the expression levels of AQP-4 compared with that in the control group. The therapeutic effect of NRG-1beta was notable, especially at the ischemic 1.0h. These results demonstrate that NRG-1beta might play a neuroprotective effect on cerebral ischemia and reperfusion by inhibiting mitochondrial apoptosis pathway and regulating the activation of AQP-4. The perfect treatment window is at ischemic 1.0h after MCAO.
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Affiliation(s)
- Qin Li
- Affiliated Hospital of Qingdao University Medical College, Qingdao 266003, China
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28
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Li Q, Zhang R, Guo YL, Mei YW. Effect of Neuregulin on Apoptosis and Expressions of STAT3 and GFAP in Rats Following Cerebral Ischemic Reperfusion. J Mol Neurosci 2008; 37:67-73. [DOI: 10.1007/s12031-008-9121-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2008] [Accepted: 06/02/2008] [Indexed: 11/24/2022]
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29
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Williams S, Ryan C, Jacobson C. Agrin and neuregulin, expanding roles and implications for therapeutics. Biotechnol Adv 2008; 26:187-201. [DOI: 10.1016/j.biotechadv.2007.11.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2007] [Revised: 11/21/2007] [Accepted: 11/21/2007] [Indexed: 01/15/2023]
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30
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Dammann O, Bueter W, Leviton A, Gressens P, Dammann CEL. Neuregulin-1: a potential endogenous protector in perinatal brain white matter damage. Neonatology 2008; 93:182-7. [PMID: 17993737 PMCID: PMC2910616 DOI: 10.1159/000111119] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Brain white matter damage, an important antecedent of long-term disabilities among preterm infants, has both endogenous and exogenous components. One of the endogenous components is the paucity of developmentally regulated protectors. Here we expand on this component, discussing the potential roles of one putative protector, neuregulin (NRG)-1, in brain development and damage. We outline how NRG-1 might be involved in perinatal brain damage pathomechanisms and suggest that NRG-1 might be one target for intervention.
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Affiliation(s)
- Olaf Dammann
- Division of Newborn Medicine, Department of Pediatrics, Tufts-New England Medical Center, Boston, Mass., USA.
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31
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Nadri C, Belmaker RH, Agam G. Oxygen restriction of neonate rats elevates neuregulin-1α isoform levels: Possible relationship to schizophrenia. Neurochem Int 2007; 51:447-50. [PMID: 17630047 DOI: 10.1016/j.neuint.2007.03.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2006] [Revised: 03/19/2007] [Accepted: 03/23/2007] [Indexed: 02/03/2023]
Abstract
Neuregulin-1 (NRG-1), a replicated gene in schizophrenia-association studies, exhibits six mRNA-types and two types of the EGF-like domain, alpha and beta. The beta-isoform was extensively studied, less is known about the extent and specific localization of adult brain NRG-1alpha. NRG-1alpha protein levels were reported reduced in postmortem prefrontal-cortex of schizophrenia patients. NRG-1 type I mRNA levels were found higher in postmortem brain in schizophrenia. In an attempt to decipher between a genetic or environmental involvement in the differences in NRG-1 levels in postmortem brain in schizophrenia, and since obstetric complications were suggested non-genetic risk-factors of schizophrenia, we studied the effect of perinatal hypoxia in rats on brain NRG-1alpha protein levels. Seven-day-old rats were exposed to hypoxia versus air. Frontal-cortex levels of NRG-1alpha isoform were quantified at adulthood by Western blotting. Frontal-cortex NRG-1alpha was 32% elevated in hypoxia-exposed rats. The data support the role of non-genetic factors, e.g. oxygen restriction, in the expression of genes associated with schizophrenia.
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Affiliation(s)
- Carmit Nadri
- Stanley Research Center, Faculty of Health Science, Ben-Gurion University of the Negev, and Mental Health Center, Beersheva, Israel
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Wolfberg AJ, Dammann O, Gressens P. Anti-inflammatory and immunomodulatory strategies to protect the perinatal brain. Semin Fetal Neonatal Med 2007; 12:296-302. [PMID: 17418653 DOI: 10.1016/j.siny.2007.01.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Infection and inflammation contribute to perinatal brain damage, particularly to the white matter. Although combating perinatal inflammation can be dangerous, because inflammation might have beneficial effects for mother and fetus, it is worthwhile reviewing potential anti-inflammatory neuroprotective compounds, along with their potential adverse effects. Further research on the possible neuroprotective roles of existing medications and substances is necessary.
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Affiliation(s)
- Adam J Wolfberg
- Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Tufts New England Medical Center, Boston, MA, USA
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Roy K, Murtie JC, El-Khodor BF, Edgar N, Sardi SP, Hooks BM, Benoit-Marand M, Chen C, Moore H, O'Donnell P, Brunner D, Corfas G. Loss of erbB signaling in oligodendrocytes alters myelin and dopaminergic function, a potential mechanism for neuropsychiatric disorders. Proc Natl Acad Sci U S A 2007; 104:8131-6. [PMID: 17483467 PMCID: PMC1876583 DOI: 10.1073/pnas.0702157104] [Citation(s) in RCA: 244] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Several psychiatric disorders are associated with white matter defects, suggesting that oligodendrocyte (OL) abnormalities underlie some aspects of these diseases. Neuregulin 1 (NRG1) and its receptor, erbB4, are genetically linked with susceptibility to schizophrenia and bipolar disorder. In vitro studies suggest that NRG1-erbB signaling is important for OL development. To test whether erbB signaling contributes to psychiatric disorders by regulating the structure or function of OLs, we analyzed transgenic mice in which erbB signaling is blocked in OLs in vivo. Here we show that loss of erbB signaling leads to changes in OL number and morphology, reduced myelin thickness, and slower conduction velocity in CNS axons. Furthermore, these transgenic mice have increased levels of dopamine receptors and transporters and behavioral alterations consistent with neuropsychiatric disorders. These results indicate that defects in white matter can cause alterations in dopaminergic function and behavior relevant to neuropsychiatric disorders.
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Affiliation(s)
- Kristine Roy
- *Neurobiology Program, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115
| | - Joshua C. Murtie
- *Neurobiology Program, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115
| | | | | | - S. Pablo Sardi
- *Neurobiology Program, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115
| | - Bryan M. Hooks
- *Neurobiology Program, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115
| | - Marianne Benoit-Marand
- Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD 21201; and
| | - Chinfei Chen
- *Neurobiology Program, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115
| | - Holly Moore
- Department of Psychiatry, Columbia University, New York, NY 10032
| | - Patricio O'Donnell
- Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD 21201; and
| | - Daniela Brunner
- PsychoGenics, Inc., Tarrytown, NY 10591
- Department of Biopsychology, New York State Psychiatric Institute, New York, NY 10032
| | - Gabriel Corfas
- *Neurobiology Program, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115
- To whom correspondence should be addressed at:
Neurobiology Program, Children's Hospital, 300 Longwood Avenue, Boston, MA 02115. E-mail:
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Clement CM, Thomas LK, Mou Y, Croslan DR, Gibbons GH, Ford BD. Neuregulin-1 attenuates neointimal formation following vascular injury and inhibits the proliferation of vascular smooth muscle cells. J Vasc Res 2007; 44:303-12. [PMID: 17438359 DOI: 10.1159/000101776] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2006] [Accepted: 01/16/2007] [Indexed: 12/28/2022] Open
Abstract
Neuregulin-1 (NRG-1) is expressed in vascular endothelial cells, and its receptors are localized to the underlying smooth muscle cells. However, the role of NRG-1 in vascular function and injury is largely unknown. First, the expression of NRG-1 and its receptors (erbB receptors) was analyzed after balloon injury to the rat carotid artery. NRG-1 and erbB expression levels were low in uninjured vessels; however, NRG-1 and erbB4 were upregulated following injury. We then examined the effect of NRG-1 on neointimal formation following balloon injury. NRG-1 was administered by tail-vein injection prior to injury and every 2 days following injury. Two weeks after injury, NRG-1-treated animals demonstrated a 50% reduction in lesion size compared with controls receiving the vehicle. To examine possible mechanisms for NRG-1 action, we examined its effects on vascular smooth muscle cell (VSMC) function. Rat VSMC cultures were pretreated with NRG-1 for 24 h and then stimulated with platelet-derived growth factor. NRG-1 significantly decreased platelet-derived growth factor-stimulated VSMC proliferation and migration. These findings suggest that NRG-1 may be a novel therapeutic candidate for the treatment of restenosis and atherosclerosis.
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Affiliation(s)
- Ceiléssia M Clement
- Department of Anatomy and Neurobiology, Neuroscience Institute, Morehouse School of Medicine, Atlanta, GA 30310, USA
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35
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Lai AY, Todd KG. Microglia in cerebral ischemia: molecular actions and interactions. Can J Physiol Pharmacol 2006; 84:49-59. [PMID: 16845890 DOI: 10.1139/y05-143] [Citation(s) in RCA: 146] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The precise role of microglia in stroke and cerebral ischemia has been the subject of debate for a number of years. Microglia are capable of synthesizing numerous soluble and membrane-bound biomolecules, some known to be neuroprotective, some neurotoxic, whereas others have less definitive bioactivities. The molecular mechanisms through which microglia activate these molecules have thus become an important area of ischemia research. Here we provide a survey review that summarizes the key actions of microglial factors in cerebral ischemia including complement proteins, chemokines, pro-inflammatory cytokines, neurotrophic factors, hormones, and proteinases, as well several important messenger molecules that play a part in how these factors respond to extracellular signals during ischemic injuries. We also provide some new perspectives on how microglial intracellular signaling may contribute to the seemingly contradictory roles of several microglial effector molecules.
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Affiliation(s)
- Aaron Y Lai
- Neurochemical Research Unit, Department of Psychiatry and Centre for Neuroscience, University of Alberta, Edmonton, Canada
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Saganová K, Burda J, Orendácová J, Cízková D, Vanický I. Fluoro-Jade B staining following zymosan microinjection into the spinal cord white matter. Cell Mol Neurobiol 2006; 26:1463-73. [PMID: 16773443 DOI: 10.1007/s10571-006-9081-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2005] [Accepted: 04/24/2006] [Indexed: 12/26/2022]
Abstract
1. The fluorescein derivate Fluoro-Jade B (FJB), which primarily labels dead or dying neurons, was used to study the acute focal inflammation in the spinal cord white matter. Inflammation was induced by microinjection of the yeast particulate zymosan to evaluate the biological effects of intraspinal macrophages activation without the confounding effects of physical trauma. 2. A single bolus of zymosan (Sigma, 75 nL) was stereotaxically injected at the thoracic level into the lateral white matter of rat spinal cord. A standard Fluoro-Jade B staining protocol was applied to spinal cord sections at 6, 12, 24 h and 2, 4 days postinjection. Neutral Red, NADPH-diaphorase, Iba1-IR, and DAPI staining protocols accomplished examination of the cells participating in the acute inflammatory response. 3. Zymosan caused formation of clearly delineated inflammation lesions localized in the lateral white matter of the spinal cord. Fluoro-Jade B stained cells in the area of inflammation were not observed at 12 h postinjection while mild FJB staining appeared at 24 h and intense staining was observed at 2 and 4 days postinjection. 4. This study shows that the acute response to zymosan-induced inflammation in the rat spinal cord white matter causes a gradual appearance of phagocytic microglia/macrophages and delayed FJB staining of the inflammatory cells. 5. FJB, a reliable marker of dying neurons, is a more universal agent than formerly believed. One possible explanation for the gradual appearance of FJB-stained cells in the area of inflammation is that specific time is required for sufficient levels of proteins and/or myelin debris of axonal origin to appear in the cytoplasm of phagocytic microglia/macrophages.
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Affiliation(s)
- Kamila Saganová
- Center of Excellence, Institute of Neurobiology, Slovak Academy of Sciences, Kosice, Slovak Republic.
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Xu Z, Croslan DR, Harris AE, Ford GD, Ford BD. Extended therapeutic window and functional recovery after intraarterial administration of neuregulin-1 after focal ischemic stroke. J Cereb Blood Flow Metab 2006; 26:527-35. [PMID: 16136057 DOI: 10.1038/sj.jcbfm.9600212] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We have previously shown that neuregulin-1 (NRG-1) protects neurons from ischemic brain injury if administered before focal stroke. Here, we examined the therapeutic window and functional recovery after NRG-1 treatment in rats subjected to 90 mins of middle cerebral artery occlusion (MCAO) and 24 h of reperfusion. Neuregulin-1 (2.5 microg/kg [corrected] bolus, 1.25 microg/kg/min [corrected] infusion) reduced infarct volume by 89.2%+/-41.9% (mean+/-s.d.; n=8; P<0.01) if administered immediately after the onset of reperfusion. Neuroprotection was also evident if NRG-1 was administered 4 h (66.4%+/-52.6%; n=7; P<0.01) and 12 h (57.0%+/-20.8%; n=8; P<0.01) after reperfusion. Neuregulin-1 administration also resulted in a significant improvement of functional neurologic outcome compared with vehicle-treated animals (32.1%+/-5.7%; n=9; P<0.01). The neuroprotective effect of the single administration of NRG-1 was seen as long as 2 weeks after treatment. Neurons labeled with the neurodegeneration marker dye Fluoro-JadeB were observed after MCAO in the cortex, but the numbers were significantly reduced after NRG-1 treatment. These results indicate that NRG-1 is a potent neuroprotective compound with an extended therapeutic window that has practical therapeutic potential in treating individuals after ischemic brain injury.
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Affiliation(s)
- Zhenfeng Xu
- Department of Anatomy and Neurobiology, Neuroscience Institute, Morehouse School of Medicine, Atlanta, Georgia 30310, USA
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Ford G, Xu Z, Gates A, Jiang J, Ford BD. Expression Analysis Systematic Explorer (EASE) analysis reveals differential gene expression in permanent and transient focal stroke rat models. Brain Res 2006; 1071:226-36. [PMID: 16409990 DOI: 10.1016/j.brainres.2005.11.090] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2005] [Revised: 11/19/2005] [Accepted: 11/22/2005] [Indexed: 11/16/2022]
Abstract
To gain greater insight on the molecular mechanisms that underlie ischemic stroke, we compared gene expression profiles in transient (tMCAO) and permanent middle cerebral artery occlusion (pMCAO) stroke models using Expression Analysis Systematic Explorer (EASE) pathway analysis software. Many transcripts were induced in both stroke models, including genes associated with transcriptional pathways, cell death, stress responses and metabolism. However, EASE analysis of the regulated genes indicated molecular functions and biological processes unique to each model. Pathways associated with tMCAO included inflammation, apoptosis and cell cycle, while pMCAO was associated with the induction of genes encoding neurotransmitter receptors, ion channels, growth factors and signaling molecules. An intriguing finding was the involvement of tyrosine kinases and phosphatases following pMCAO. These results provide evidence that neuronal death following tMCAO and pMCAO involves distinct mechanisms. These findings may give new insight to the molecular mechanisms involved in stroke and may lead to novel neuroprotective strategies.
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Affiliation(s)
- Gregory Ford
- Department of Anatomy and Neurobiology, Neuroscience Institute, Morehouse School of Medicine, 720 Westview Drive, SW, MRC 222, Atlanta, GA 30310, USA
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