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Fang J, Wei Z, Zheng D, Ying T, Hong H, Hu D, Lin Y, Jiang X, Wu L, Lan T, Yang Z, Zhou X, Chen L. Recombinant Extracellular Domain (p75ECD) of the Neurotrophin Receptor p75 Attenuates Myocardial Ischemia-Reperfusion Injury by Inhibiting the p-JNK/Caspase-3 Signaling Pathway in Rat Microvascular Pericytes. J Am Heart Assoc 2020; 9:e016047. [PMID: 32567476 PMCID: PMC7670530 DOI: 10.1161/jaha.119.016047] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Background Pro-NTs (precursor of neurotrophins) and their receptor p75 are potential targets for preventing microvascular dysfunction induced by myocardial ischemia-reperfusion injury (IRI). p75ECD (ectodomain of neurotrophin receptor p75) may physiologically produce neurocytoprotective effects by scavenging pro-NTs. We therefore hypothesized that p75ECD may have a cardioprotective effect on IRI through microvascular mechanisms. Methods and Results Myocardial IRI was induced in Sprague-Dawley rats by occluding the left main coronary arteries for 45 minutes before a subsequent relaxation. Compared with the ischemia-reperfusion group, an intravenous injection of p75ECD (3 mg/kg) 5 minutes before reperfusion reduced the myocardial infarct area at 24 hours after reperfusion (by triphenyltetrazolium chloride, 44.9±3.9% versus 34.6±5.7%, P<0.05); improved the left ventricular ejection fraction (by echocardiography), with less myocardial fibrosis (by Masson's staining), and prevented microvascular dysfunction (by immunofluorescence) at 28 days after reperfusion; and reduced myocardial pro-NTs expression at 24 hours and 28 days after reperfusion (by Western blotting). A simulative IRI model using rat microvascular pericytes was established in vitro by hypoxia-reoxygenation (2/6 hours) combined with pro-NTs treatment (3 nmol/L) at R. p75ECD (3 μg/mL) given at R improved pericyte survival (by methyl thiazolyl tetrazolium assay) and attenuated apoptosis (by terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick-end labeling). In the reperfused hearts and hypoxia-reoxygenation +pro-NTs-injured pericytes, p75ECD inhibited the expression of p-JNK (phospho of c-Jun N-terminal kinase)/caspase-3 (by Western blotting). SP600125, an inhibitor of JNK, did not enhance the p75ECD-induced infarct-sparing effects and pericyte protection. Conclusions p75ECD may attenuate myocardial IRI via pro-NTs reduction-induced inhibition of p-JNK/caspase-3 pathway of microvascular pericytes in rats.
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Affiliation(s)
- Jun Fang
- Department of Cardiology Fujian Heart Medical Center Fujian Institute of Coronary Heart Disease Fujian Medical University Union Hospital Fuzhou P. R. China
| | - ZhiXiong Wei
- Department of Cardiology Fujian Heart Medical Center Fujian Institute of Coronary Heart Disease Fujian Medical University Union Hospital Fuzhou P. R. China
| | - DeDong Zheng
- Department of Cardiology Fujian Heart Medical Center Fujian Institute of Coronary Heart Disease Fujian Medical University Union Hospital Fuzhou P. R. China
| | - Teng Ying
- Department of Cardiology Fujian Heart Medical Center Fujian Institute of Coronary Heart Disease Fujian Medical University Union Hospital Fuzhou P. R. China
| | - HuaShan Hong
- Fujian Key Laboratory of Vascular Aging Department of Geriatrics Fujian Institute of Geriatrics Fujian Medical University Union Hospital Fuzhou P. R. China
| | - DanQing Hu
- Department of Cardiology Fujian Heart Medical Center Fujian Institute of Coronary Heart Disease Fujian Medical University Union Hospital Fuzhou P. R. China
| | - YunLing Lin
- Department of Cardiology Fujian Heart Medical Center Fujian Institute of Coronary Heart Disease Fujian Medical University Union Hospital Fuzhou P. R. China
| | - XiaoLiang Jiang
- Institute of Laboratory Animal Science Chinese Academy of Medical Sciences & Comparative Medicine Centre, Peking Union Medical Collage, and Beijing Collaborative Innovation Center for Cardiovascular Disorders Beijing P. R. China
| | - LingZhen Wu
- Department of Cardiology Fujian Heart Medical Center Fujian Institute of Coronary Heart Disease Fujian Medical University Union Hospital Fuzhou P. R. China
| | - TingXiang Lan
- Department of Cardiology Fujian Heart Medical Center Fujian Institute of Coronary Heart Disease Fujian Medical University Union Hospital Fuzhou P. R. China
| | - ZhiWei Yang
- Institute of Laboratory Animal Science Chinese Academy of Medical Sciences & Comparative Medicine Centre, Peking Union Medical Collage, and Beijing Collaborative Innovation Center for Cardiovascular Disorders Beijing P. R. China
| | - XinFu Zhou
- Neuroregeneration Laboratory Division of Health Sciences School of Pharmacy and Medical Sciences University of South Australia Adelaide South Australia Australia
| | - LiangLong Chen
- Department of Cardiology Fujian Heart Medical Center Fujian Institute of Coronary Heart Disease Fujian Medical University Union Hospital Fuzhou P. R. China
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Kozlov EM, Grechko AV, Chegodaev YS, Wu WK, Orekhov AN. Contribution of Neurotrophins to the Immune System Regulation and Possible Connection to Alcohol Addiction. BIOLOGY 2020; 9:biology9040063. [PMID: 32231011 PMCID: PMC7235771 DOI: 10.3390/biology9040063] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/18/2020] [Accepted: 03/19/2020] [Indexed: 12/11/2022]
Abstract
The first references to neurotrophic factors date back to the middle of the 20th century when the nerve growth factor (NGF) was first discovered. Later studies delivered a large amount of data on neurotrophic factors. However, many questions regarding neurotrophin signaling still remain unanswered. One of the principal topics in neurotrophin research is their role in the immune system regulation. Another important research question is the possible involvement of neurotrophin signaling in the pathological processes associated with alcoholism. Among known neurotrophins, NT-4 remains the least studied and appears to be involved in alcoholism and chronic stress pathogenesis. In this review we discuss known neurotrophin signaling cascades mediated by different neurotrophin receptors, as well as provide a generalization of the data regarding the influence of neurotrophins NGF, BDNF, and NT-4 on the immune system and their potential contribution to the pathogenesis of alcoholism.
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Affiliation(s)
- Evgenii M. Kozlov
- Laboratory of Clinical Microbiology and Biotechnology of Bacteriophages G.N. Gabrichevsky Moscow Research Institute for Epidemiology and Microbiology, 125212 Moscow, Russia;
| | - Andrey V. Grechko
- Federal Scientific Clinical Center for Resuscitation and Rehabilitation, 109240 Moscow, Russia;
| | - Yegor S. Chegodaev
- I. M. Sechenov First Moscow State Medical University (Sechenov University), 119146 Moscow, Russia;
| | - Wei-Kai Wu
- Department of Internal Medicine, National Taiwan University Hospital, Bei-Hu Branch, Taipei 100, Taiwan;
| | - Alexander N. Orekhov
- Laboratory of Infection Pathology and Molecular Microecology, Institute of Human Morphology, 117418 Moscow, Russia
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, 125315 Moscow, Russia
- Correspondence: ; Tel.: +7-903-169-08-66
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Shen WY, Luo C, Reinaldo Hurtado P, Hurtado-Perez E, Luo RY, Hu ZL, Li H, Xu JM, Zhou XF, Dai RP. The regulatory role of ProBDNF in monocyte function: Implications in Stanford type-A aortic dissection disease. FASEB J 2019; 34:2541-2553. [PMID: 31908023 DOI: 10.1096/fj.201901905rr] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 11/29/2019] [Accepted: 12/03/2019] [Indexed: 02/07/2023]
Abstract
Brain-derived neurotrophic factor precursor (proBDNF) has been reported to strengthen the dysfunction of monocytes/macrophages in animal studies. However, it is still unknown the roles of proBDNF in the dysfunction of monocytes in the inflammatory diseases in humans. In the present study, we showed that proBDNF and pan neurotrophic receptor p75 were significantly upregulated in monocytes from healthy donors (HD) after lipopolysaccharide treatment. Exogenous proBDNF treatment upregulated CD40 and proinflammatory cytokines expression in monocytes including interleukin (IL)-1β, IL-6, and tumor necrosis factor (TNF)-α. In Stanford type-A acute aortic dissection (AAD) patients, proBDNF was upregulated in CD14+ CD163+ CX3CR1+ M2- but not CD14+ CD68+ CCR2+ M1-like monocytes. In addition, sera from AAD patients activated gene expression of proinflammatory cytokines in cultured PBMCs from HD, which was attenuated by proBDNF monoclonal antibody (Ab-proB) treatment. These findings suggested that upregulation of proBDNF in M2-like monocytes may contribute to the proinflammatory response in the AAD.
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Affiliation(s)
- Wei-Yun Shen
- Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, China.,Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha City, China
| | - Cong Luo
- Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, China.,Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha City, China
| | | | - Ernesto Hurtado-Perez
- Department of Renal Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia
| | - Ru-Yi Luo
- Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, China.,Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha City, China
| | - Zhao-Lan Hu
- Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, China.,Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha City, China
| | - Hui Li
- Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, China.,Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha City, China
| | - Jun-Mei Xu
- Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, China.,Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha City, China
| | - Xin-Fu Zhou
- School of Pharmacy and Medical Sciences, Division of Health Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - Ru-Ping Dai
- Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, China.,Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha City, China
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Shen LL, Li WW, Xu YL, Gao SH, Xu MY, Bu XL, Liu YH, Wang J, Zhu J, Zeng F, Yao XQ, Gao CY, Xu ZQ, Zhou XF, Wang YJ. Neurotrophin receptor p75 mediates amyloid β-induced tau pathology. Neurobiol Dis 2019; 132:104567. [PMID: 31394202 DOI: 10.1016/j.nbd.2019.104567] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 06/10/2019] [Accepted: 08/02/2019] [Indexed: 01/05/2023] Open
Abstract
Neurofibrillary tangles of hyperphosphorylated tau protein (p-tau) are a key pathological feature of Alzheimer's disease (AD). Tau phosphorylation is suggested to be secondary to amyloid-beta (Aβ) accumulation. However, the mechanism by which Aβ induces tau phosphorylation in neurons remains unclear. Neurotrophin receptor p75 (p75NTR) is a receptor for Aβ and mediates Aβ neurotoxicity, implying that p75NTR may mediate Aβ-induced tau phosphorylation in AD. Here, we showed that Aβ-induced tau hyperphosphorylation and neurodegeneration, including tau phosphorylation, synaptic disorder and neuronal loss, in the brains of both male wild-type (Wt) mice and male P301L transgenic mice (a mouse model of human tauopathy) were alleviated by genetic knockout of p75NTR in the both mouse models. We further confirmed that the activation or inhibition of cyclin-dependent kinase 5 (CDK5) and glycogen synthase kinase-3β (GSK3β) significantly changed Aβ/p75NTR-mediated p-tau levels in neurons. Treatment of male P301L mice with soluble p75NTR extracellular domain (p75ECD-Fc), which antagonizes the binding of Aβ to p75NTR, suppressed tau hyperphosphorylation. Taken together, our findings suggest that p75NTR meditates Aβ-induced tau pathology and is a potential druggable target for AD and other tauopathies.
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Affiliation(s)
- Lin-Lin Shen
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China; Shigatse Branch, Xinqiao Hospital, Third Military Medical University, Shigatse 857000, China
| | - Wei-Wei Li
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Ya-Li Xu
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Shi-Hao Gao
- Shigatse Branch, Xinqiao Hospital, Third Military Medical University, Shigatse 857000, China
| | - Man-Yu Xu
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Xian-Le Bu
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Yu-Hui Liu
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Jun Wang
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Jie Zhu
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Fan Zeng
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Xiu-Qing Yao
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Chang-Yue Gao
- Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China; Department of Rehabilitation, Daping Hospital, Third Military Medical University, Chongqing 400042, China
| | - Zhi-Qiang Xu
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Xin-Fu Zhou
- School of Pharmacy and Medical Sciences and Sansom Institute, Division of Health Sciences, University of South Australia, Adelaide 5001, Australia
| | - Yan-Jiang Wang
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China; State Key Laboratory of Trauma, Burn and Combined Injury, Third Military Medical University, Chongqing 400042, China; Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China.
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55
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Zanin JP, Montroull LE, Volosin M, Friedman WJ. The p75 Neurotrophin Receptor Facilitates TrkB Signaling and Function in Rat Hippocampal Neurons. Front Cell Neurosci 2019; 13:485. [PMID: 31736712 PMCID: PMC6828739 DOI: 10.3389/fncel.2019.00485] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 10/14/2019] [Indexed: 01/02/2023] Open
Abstract
Neurotrophins activate Trk receptor signaling to support neuronal survival and many aspects of neuronal function. Early studies demonstrated that TrkA formed a complex with the p75 neurotrophin receptor (p75NTR), which increased the affinity and selectivity of NGF binding, however, whether interaction of p75NTR with other Trk receptors performs a similar function to enhance ligand binding has not been demonstrated. We investigated the interaction of TrkB with full length p75NTR in hippocampal neurons in response to BDNF and found that the association of these receptors occurs after ligand binding and requires phosphorylation of TrkB, indicating that formation of this receptor complex was not necessary for ligand binding. Moreover, the interaction of these receptors required internalization and localization to early endosomes. We found that association of TrkB with p75NTR was necessary for optimal downstream signaling of the PI3K-Akt pathway, but not the Erk pathway, in hippocampal neurons. The absence of p75NTR impaired the ability of BDNF to rescue hippocampal neurons in a trophic deprivation model, suggesting that p75NTR facilitates the ability of TrkB to activate specific pathways to promote neuronal survival.
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Affiliation(s)
- Juan P Zanin
- Department of Biological Sciences, Rutgers University, Newark, NJ, United States
| | - Laura E Montroull
- Department of Biological Sciences, Rutgers University, Newark, NJ, United States
| | - Marta Volosin
- Department of Biological Sciences, Rutgers University, Newark, NJ, United States
| | - Wilma J Friedman
- Department of Biological Sciences, Rutgers University, Newark, NJ, United States
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56
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Meier S, Alfonsi F, Kurniawan ND, Milne MR, Kasherman MA, Delogu A, Piper M, Coulson EJ. The p75 neurotrophin receptor is required for the survival of neuronal progenitors and normal formation of the basal forebrain, striatum, thalamus and neocortex. Development 2019; 146:dev.181933. [PMID: 31488566 DOI: 10.1242/dev.181933] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 08/19/2019] [Indexed: 11/20/2022]
Abstract
During development, the p75 neurotrophin receptor (p75NTR) is widely expressed in the nervous system where it regulates neuronal differentiation, migration and axonal outgrowth. p75NTR also mediates the survival and death of newly born neurons, with functional outcomes being dependent on both timing and cellular context. Here, we show that knockout of p75NTR from embryonic day 10 (E10) in neural progenitors using a conditional Nestin-Cre p75NTR floxed mouse causes increased apoptosis of progenitor cells. By E14.5, the number of Tbr2-positive progenitor cells was significantly reduced and the rate of neurogenesis was halved. Furthermore, in adult knockout mice, there were fewer cortical pyramidal neurons, interneurons, cholinergic basal forebrain neurons and striatal neurons, corresponding to a relative reduction in volume of these structures. Thalamic midline fusion during early postnatal development was also impaired in Nestin-Cre p75NTR floxed mice, indicating a novel role for p75NTR in the formation of this structure. The phenotype of this strain demonstrates that p75NTR regulates multiple aspects of brain development, including cortical progenitor cell survival, and that expression during early neurogenesis is required for appropriate formation of telencephalic structures.
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Affiliation(s)
- Sonja Meier
- Queensland Brain Institute, The University of Queensland, 4072 Brisbane, Australia
| | - Fabienne Alfonsi
- Queensland Brain Institute, The University of Queensland, 4072 Brisbane, Australia
| | - Nyoman D Kurniawan
- Centre for Advanced Imaging, The University of Queensland, 4072 Brisbane, Australia
| | - Michael R Milne
- School of Biomedical Sciences, The University of Queensland, 4072 Brisbane, Australia
| | - Maria A Kasherman
- Griffith Institute for Drug Discovery, Griffith University, 4122 Brisbane, Australia
| | - Alessio Delogu
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, Kings College, London SE5 9RX, UK
| | - Michael Piper
- Queensland Brain Institute, The University of Queensland, 4072 Brisbane, Australia
| | - Elizabeth J Coulson
- Queensland Brain Institute, The University of Queensland, 4072 Brisbane, Australia .,School of Biomedical Sciences, The University of Queensland, 4072 Brisbane, Australia
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57
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58
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Pérez V, Bermedo-Garcia F, Zelada D, Court FA, Pérez MÁ, Fuenzalida M, Ábrigo J, Cabello-Verrugio C, Moya-Alvarado G, Tapia JC, Valenzuela V, Hetz C, Bronfman FC, Henríquez JP. The p75 NTR neurotrophin receptor is required to organize the mature neuromuscular synapse by regulating synaptic vesicle availability. Acta Neuropathol Commun 2019; 7:147. [PMID: 31514753 PMCID: PMC6739937 DOI: 10.1186/s40478-019-0802-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 09/01/2019] [Indexed: 02/07/2023] Open
Abstract
The coordinated movement of organisms relies on efficient nerve-muscle communication at the neuromuscular junction. After peripheral nerve injury or neurodegeneration, motor neurons and Schwann cells increase the expression of the p75NTR pan-neurotrophin receptor. Even though p75NTR targeting has emerged as a promising therapeutic strategy to delay peripheral neuronal damage progression, the effects of long-term p75NTR inhibition at the mature neuromuscular junction have not been elucidated. We performed quantitative neuroanathomical analyses of the neuromuscular junction in p75NTR null mice by laser confocal and electron microscopy, which were complemented with electromyography, locomotor tests, and pharmacological intervention studies. Mature neuromuscular synapses of p75NTR null mice show impaired postsynaptic organization and ultrastructural complexity, which correlate with altered synaptic function at the levels of nerve activity-induced muscle responses, muscle fiber structure, force production, and locomotor performance. Our results on primary myotubes and denervated muscles indicate that muscle-derived p75NTR does not play a major role on postsynaptic organization. In turn, motor axon terminals of p75NTR null mice display a strong reduction in the number of synaptic vesicles and active zones. According to the observed pre and postsynaptic defects, pharmacological acetylcholinesterase inhibition rescued nerve-dependent muscle response and force production in p75NTR null mice. Our findings revealing that p75NTR is required to organize mature neuromuscular junctions contribute to a comprehensive view of the possible effects caused by therapeutic attempts to target p75NTR.
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Affiliation(s)
- Viviana Pérez
- Neuromuscular Studies Laboratory (NeSt Lab), Department of Cell Biology, Center for Advanced Microscopy (CMA BioBio), Universidad de Concepción, Concepción, Chile
| | - Francisca Bermedo-Garcia
- Neuromuscular Studies Laboratory (NeSt Lab), Department of Cell Biology, Center for Advanced Microscopy (CMA BioBio), Universidad de Concepción, Concepción, Chile
| | - Diego Zelada
- Neuromuscular Studies Laboratory (NeSt Lab), Department of Cell Biology, Center for Advanced Microscopy (CMA BioBio), Universidad de Concepción, Concepción, Chile
| | - Felipe A Court
- Center for Integrative Biology, Faculty of Sciences, Universidad Mayor; FONDAP Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Miguel Ángel Pérez
- Laboratory of Neural Plasticity, Center for Neurobiology and Integrative Physiology, Faculty of Sciences, Institute of Physiology, Universidad de Valparaíso, Valparaíso, Chile
- Present Address: Health Sciences School, Universidad de Viña del Mar, Viña del Mar, Chile
| | - Marco Fuenzalida
- Laboratory of Neural Plasticity, Center for Neurobiology and Integrative Physiology, Faculty of Sciences, Institute of Physiology, Universidad de Valparaíso, Valparaíso, Chile
| | - Johanna Ábrigo
- Laboratory of Muscle Pathologies, Fragility and Aging, Department of Biological Sciences, Faculty of Life Sciences, Millennium Institute on Immunology and Immunotherapy, Universidad Andrés Bello, Santiago, Chile
| | - Claudio Cabello-Verrugio
- Laboratory of Muscle Pathologies, Fragility and Aging, Department of Biological Sciences, Faculty of Life Sciences, Millennium Institute on Immunology and Immunotherapy, Universidad Andrés Bello, Santiago, Chile
| | - Guillermo Moya-Alvarado
- Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Juan Carlos Tapia
- Department of Biomedical Sciences, Faculty of Health Sciences, Universidad de Talca, Talca, Chile
| | - Vicente Valenzuela
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
| | - Claudio Hetz
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
| | - Francisca C Bronfman
- Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile.
- Center for Aging and Regeneration (CARE), Institute of Biomedical Sciences (ICB), Faculty of Medicine and Faculty of Life Sciences, Universidad Andrés Bello, Santiago, Chile.
| | - Juan Pablo Henríquez
- Neuromuscular Studies Laboratory (NeSt Lab), Department of Cell Biology, Center for Advanced Microscopy (CMA BioBio), Universidad de Concepción, Concepción, Chile.
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Zhou T, Wang H, Shen J, Li W, Cao M, Hong Y, Cao M. The p35/CDK5 signaling is regulated by p75NTR in neuronal apoptosis after intracerebral hemorrhage. J Cell Physiol 2019; 234:15856-15871. [PMID: 30770557 DOI: 10.1002/jcp.28244] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 01/02/2019] [Accepted: 01/10/2019] [Indexed: 01/24/2023]
Abstract
The p75 neurotrophin receptor (p75NTR), a member of tumor necrosis factor receptor superfamily, involves in neuronal apoptosis after intracerebral hemorrhage (ICH). It has been previously demonstrated that phosphorylation of p35 is a crucial factor for fighting against the proapoptotic p25/CDK5 signaling in neuronal apoptosis. Then, in ICH models of rats and primary cortical neurons, we found that the expressions of p75NTR, p-histone H1 (the kinase activity of CDK5), p25, Fas-associated phosphatase-1 (FAP-1), and phosphorylated myocyte enhancer factor 2D (p-MEF2D) were enhanced after ICH, whereas the expression of p35-Thr(138) was attenuated. Coimmunoprecipitation analysis indicated several interactions as follows: p35/p25 and CKD5, p75NTR and p35, as well as p75NTR and FAP-1. After p75NTR or FAP-1 depletion with double-stranded RNA interference in PC12 cells, the levels of p25 and p-histone H1 were attenuated, whereas p35-Thr(138) was elevated. Considering p75NTR has no effect of dephosphorylation, our results suggested that p75NTR might promote the dephosphorylation of p35-Thr(138) via interaction with FAP-1, and the p75NTR/p35 complex upregulated p25/CDK5 signaling to facilitate the neuronal apoptosis following ICH. So, in the study, we aimed to provide a theoretical and experimental basis that p75NTR could be regulated to reduce neuronal apoptosis following ICH for potential clinical treatment.
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Affiliation(s)
- Tingting Zhou
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, People's Republic of China
| | - Hongmei Wang
- Department of Neurology, Nantong Rich Hospital, Nantong, Jiangsu Province, People's Republic of China
| | - Jiabing Shen
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, People's Republic of China
| | - Wanyan Li
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, People's Republic of China
| | - Maosheng Cao
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, People's Republic of China
| | - Yao Hong
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, People's Republic of China
| | - Maohong Cao
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, People's Republic of China
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Speidell A, Asuni GP, Avdoshina V, Scognamiglio S, Forcelli P, Mocchetti I. Reversal of Cognitive Impairment in gp120 Transgenic Mice by the Removal of the p75 Neurotrophin Receptor. Front Cell Neurosci 2019; 13:398. [PMID: 31543761 PMCID: PMC6730486 DOI: 10.3389/fncel.2019.00398] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 08/16/2019] [Indexed: 01/04/2023] Open
Abstract
Activation of the p75 neurotrophin receptor (p75NTR), by the proneurotrophin brain-derived neurotrophic factor (proBDNF), triggers loss of synapses and promotes neuronal death. These pathological features are also caused by the human immunodeficiency virus-1 (HIV) envelope protein gp120, which increases the levels of proBDNF. To establish whether p75NTR plays a role in gp120-mediated neurite pruning, we exposed primary cultures of cortical neurons from p75NTR–/– mice to gp120. We found that the lack of p75NTR expression significantly reduced gp120-mediated neuronal cell death. To determine whether knocking down p75NTR is neuroprotective in vivo, we intercrossed gp120 transgenic (tg) mice with p75NTR heterozygous mice to obtain gp120tg mice lacking one or two p75NTR alleles. The removal of p75NTR alleles inhibited gp120-mediated decrease of excitatory synapses in the hippocampus, as measured by the levels of PSD95 and subunits of the N-methyl-D-Aspartate receptor in synaptosomes. Moreover, the deletion of only one copy of the p75NTR gene was sufficient to restore the cognitive impairment observed in gp120tg mice. Our data suggest that activation of p75NTR is one of the mechanisms crucial for the neurotoxic effect of gp120. These data indicate that p75NTR antagonists could provide an adjunct therapy against synaptic simplification caused by HIV.
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Affiliation(s)
- Andrew Speidell
- Laboratory of Preclinical Neurobiology, Department of Neuroscience, Georgetown University Medical Center, Washington, DC, United States
| | - Gino Paolo Asuni
- Laboratory of Preclinical Neurobiology, Department of Neuroscience, Georgetown University Medical Center, Washington, DC, United States
| | - Valeria Avdoshina
- Laboratory of Preclinical Neurobiology, Department of Neuroscience, Georgetown University Medical Center, Washington, DC, United States
| | - Serena Scognamiglio
- Laboratory of Preclinical Neurobiology, Department of Neuroscience, Georgetown University Medical Center, Washington, DC, United States
| | - Patrick Forcelli
- Department of Pharmacology and Physiology, Georgetown University Medical Center, Washington, DC, United States
| | - Italo Mocchetti
- Laboratory of Preclinical Neurobiology, Department of Neuroscience, Georgetown University Medical Center, Washington, DC, United States
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TrkB agonistic antibodies superior to BDNF: Utility in treating motoneuron degeneration. Neurobiol Dis 2019; 132:104590. [PMID: 31470106 DOI: 10.1016/j.nbd.2019.104590] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 08/18/2019] [Accepted: 08/26/2019] [Indexed: 12/13/2022] Open
Abstract
While Brain-derived Neurotrophic Factor (BDNF) has long been implicated in treating neurological diseases, recombinant BDNF protein has failed in multiple clinical trials. In addition to its unstable and adhesive nature, BDNF can activate p75NTR, a receptor mediating cellular functions opposite to those of TrkB. We have now identified TrkB agonistic antibodies (TrkB-agoAbs) with several properties superior to BDNF: They exhibit blood half-life of days instead of hours, diffuse centimeters in neural tissues instead millimeters, and bind and activate TrkB, but not p75NTR. In addition, TrkB-agoAbs elicit much longer TrkB activation, reduced TrkB internalization and less intracellular degradation, compared with BDNF. More importantly, some of these TrkB-agoAbs bind TrkB epitopes distinct from that by BDNF, and work cooperatively with endogenous BDNF. Unlike BDNF, the TrkB-agoAbs exhibit a half-life of days/weeks and diffused readily in nerve tissues. We tested one of TrkB-agoAbs further and showed that it enhanced motoneuron survival in the spinal-root avulsion model for motoneuron degeneration in vivo. Thus, TrkB-agoAbs are promising drug candidates for the treatment of neural injury.
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Pro-Nerve Growth Factor Induces Activation of RhoA Kinase and Neuronal Cell Death. Brain Sci 2019; 9:brainsci9080204. [PMID: 31430874 PMCID: PMC6721354 DOI: 10.3390/brainsci9080204] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/13/2019] [Accepted: 08/14/2019] [Indexed: 12/12/2022] Open
Abstract
We have previously shown that the expression of pro-nerve growth factor (proNGF) was significantly increased, nerve growth factor (NGF) level was decreased, and the expression of p75NTR was enhanced in Alzheimer’s disease (AD) hippocampal samples. NGF regulates cell survival and differentiation by binding TrkA and p75NTR receptors. ProNGF is the precursor form of NGF, binds to p75NTR, and induces cell apoptosis. The objective of this study is to determine whether the increased p75NTR expression in AD is due to the accumulation of proNGF and Rho kinase activation. PC12 cells were stimulated with either proNGF or NGF. Pull-down assay was carried out to determine the RhoA kinase activity. We found the expression of p75NTR was enhanced by proNGF compared to NGF. The proNGF stimulation also increased the RhoA kinase activity leading to apoptosis. The expression of active RhoA kinase was found to be increased in human AD hippocampus compared to control. The addition of RhoA kinase inhibitor Y27632 not only blocked the RhoA kinase activity but also reduced the expression of p75NTR receptor and inhibited the activation of JNK and MAPK induced by proNGF. This suggests that overexpression of proNGF in AD enhances p75NTR expression and activation of RhoA, leading to neuronal cell death.
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Saadipour K, Tiberi A, Lombardo S, Grajales E, Montroull L, Mañucat-Tan NB, LaFrancois J, Cammer M, Mathews PM, Scharfman HE, Liao FF, Friedman WJ, Zhou XF, Tesco G, Chao MV. Regulation of BACE1 expression after injury is linked to the p75 neurotrophin receptor. Mol Cell Neurosci 2019; 99:103395. [PMID: 31422108 DOI: 10.1016/j.mcn.2019.103395] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 07/24/2019] [Accepted: 08/08/2019] [Indexed: 12/25/2022] Open
Abstract
BACE1 is a transmembrane aspartic protease that cleaves various substrates and it is required for normal brain function. BACE1 expression is high during early development, but it is reduced in adulthood. Under conditions of stress and injury, BACE1 levels are increased; however, the underlying mechanisms that drive BACE1 elevation are not well understood. One mechanism associated with brain injury is the activation of injurious p75 neurotrophin receptor (p75), which can trigger pathological signals. Here we report that within 72 h after controlled cortical impact (CCI) or laser injury, BACE1 and p75 are increased and tightly co-expressed in cortical neurons of mouse brain. Additionally, BACE1 is not up-regulated in p75 null mice in response to focal cortical injury, while p75 over-expression results in BACE1 augmentation in HEK-293 and SY5Y cell lines. A luciferase assay conducted in SY5Y cell line revealed that BACE1 expression is regulated at the transcriptional level in response to p75 transfection. Interestingly, this effect does not appear to be dependent upon p75 ligands including mature and pro-neurotrophins. In addition, BACE1 activity on amyloid precursor protein (APP) is enhanced in SY5Y-APP cells transfected with a p75 construct. Lastly, we found that the activation of c-jun n-terminal kinase (JNK) by p75 contributes to BACE1 up-regulation. This study explores how two injury-induced molecules are intimately connected and suggests a potential link between p75 signaling and the expression of BACE1 after brain injury.
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Affiliation(s)
- Khalil Saadipour
- Departments of Cell Biology, Physiology & Neuroscience, and Psychiatry, Skirball Institute of Biomolecular Medicine, New York University Langone Medical Center, New York, New York 10016, USA.
| | - Alexia Tiberi
- Departments of Cell Biology, Physiology & Neuroscience, and Psychiatry, Skirball Institute of Biomolecular Medicine, New York University Langone Medical Center, New York, New York 10016, USA; Bio@SNS Laboratory, Scuola Normale Superiore, Piazza dei Cavalieri 7, Pisa, 56126, Italy
| | - Sylvia Lombardo
- Alzheimer's Disease Research Laboratory, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA, 02111, USA
| | - Elena Grajales
- Departments of Cell Biology, Physiology & Neuroscience, and Psychiatry, Skirball Institute of Biomolecular Medicine, New York University Langone Medical Center, New York, New York 10016, USA
| | - Laura Montroull
- Department of Biological Sciences, Rutgers Life Sciences Center, Rutgers University, Newark, NJ 07102, USA
| | - Noralyn B Mañucat-Tan
- School of Pharmacy and Medical Sciences, Sansom Institute, University of South Australia, Adelaide, South Australia, 5000, Australia
| | - John LaFrancois
- The Nathan Kline Institute of Psychiatric Research, Center for Dementia Research, Orangeburg, NY 10962, USA
| | - Michael Cammer
- DART Microscopy Laboratory, NYU Langone Medical Center, New York, NY 10016, USA
| | - Paul M Mathews
- The Nathan Kline Institute of Psychiatric Research, Center for Dementia Research, Orangeburg, NY 10962, USA
| | - Helen E Scharfman
- The Nathan Kline Institute of Psychiatric Research, Center for Dementia Research, Orangeburg, NY 10962, USA
| | - Francesca-Fang Liao
- Department of Pharmacology, University of Tennessee Health Science Center, Memphis, Tennessee 38163, USA
| | - Wilma J Friedman
- Department of Biological Sciences, Rutgers Life Sciences Center, Rutgers University, Newark, NJ 07102, USA
| | - Xin-Fu Zhou
- School of Pharmacy and Medical Sciences, Sansom Institute, University of South Australia, Adelaide, South Australia, 5000, Australia
| | - Giueseppina Tesco
- Alzheimer's Disease Research Laboratory, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA, 02111, USA
| | - Moses V Chao
- Departments of Cell Biology, Physiology & Neuroscience, and Psychiatry, Skirball Institute of Biomolecular Medicine, New York University Langone Medical Center, New York, New York 10016, USA.
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Pham DD, Bruelle C, Thi Do H, Pajanoja C, Jin C, Srinivasan V, Olkkonen VM, Eriksson O, Jauhiainen M, Lalowski M, Lindholm D. Caspase-2 and p75 neurotrophin receptor (p75NTR) are involved in the regulation of SREBP and lipid genes in hepatocyte cells. Cell Death Dis 2019; 10:537. [PMID: 31296846 PMCID: PMC6624261 DOI: 10.1038/s41419-019-1758-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 06/11/2019] [Indexed: 12/16/2022]
Abstract
Lipid-induced toxicity is part of several human diseases, but the mechanisms involved are not fully understood. Fatty liver is characterized by the expression of different growth and tissue factors. The neurotrophin, nerve growth factor (NGF) and its pro-form, pro-NGF, are present in fatty liver together with p75 neurotrophin receptor (p75NTR). Stimulation of human Huh7 hepatocyte cells with NGF and pro-NGF induced Sterol-regulator-element-binding protein-2 (SREBP2) activation and increased Low-Density Lipoprotein Receptor (LDLR) expression. We observed that phosphorylation of caspase-2 by p38 MAPK was essential for this regulation involving a caspase-3-mediated cleavage of SREBP2. RNA sequencing showed that several genes involved in lipid metabolism were altered in p75NTR-deficient mouse liver. The same lipogenic genes were downregulated in p75NTR gene-engineered human Huh7 cells and reciprocally upregulated by stimulation of p75NTRs. In the knock-out mice the serum cholesterol and triglyceride levels were reduced, suggesting a physiological role of p75NTRs in whole-body lipid metabolism. Taken together, this study shows that p75NTR signaling influences a network of genes involved in lipid metabolism in liver and hepatocyte cells. Modulation of p75NTR signaling may be a target to consider in various metabolic disorders accompanied by increased lipid accumulation.
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Affiliation(s)
- Dan Duc Pham
- Medicum, Department of Biochemistry and Developmental Biology, Medical Faculty, University of Helsinki, POB 63, FI-00014, Helsinki, Finland
- Minerva Foundation Institute for Medical Research, Biomedicum 2, Tukholmankatu 8, FI-00290, Helsinki, Finland
| | - Céline Bruelle
- Medicum, Department of Biochemistry and Developmental Biology, Medical Faculty, University of Helsinki, POB 63, FI-00014, Helsinki, Finland
- Minerva Foundation Institute for Medical Research, Biomedicum 2, Tukholmankatu 8, FI-00290, Helsinki, Finland
| | - Hai Thi Do
- Medicum, Department of Biochemistry and Developmental Biology, Medical Faculty, University of Helsinki, POB 63, FI-00014, Helsinki, Finland
- Minerva Foundation Institute for Medical Research, Biomedicum 2, Tukholmankatu 8, FI-00290, Helsinki, Finland
| | - Ceren Pajanoja
- Medicum, Department of Biochemistry and Developmental Biology, Medical Faculty, University of Helsinki, POB 63, FI-00014, Helsinki, Finland
- Minerva Foundation Institute for Medical Research, Biomedicum 2, Tukholmankatu 8, FI-00290, Helsinki, Finland
| | - Congyu Jin
- Medicum, Department of Biochemistry and Developmental Biology, Medical Faculty, University of Helsinki, POB 63, FI-00014, Helsinki, Finland
| | - Vignesh Srinivasan
- Medicum, Department of Biochemistry and Developmental Biology, Medical Faculty, University of Helsinki, POB 63, FI-00014, Helsinki, Finland
- Minerva Foundation Institute for Medical Research, Biomedicum 2, Tukholmankatu 8, FI-00290, Helsinki, Finland
| | - Vesa M Olkkonen
- Minerva Foundation Institute for Medical Research, Biomedicum 2, Tukholmankatu 8, FI-00290, Helsinki, Finland
| | - Ove Eriksson
- Medicum, Department of Biochemistry and Developmental Biology, Medical Faculty, University of Helsinki, POB 63, FI-00014, Helsinki, Finland
| | - Matti Jauhiainen
- Minerva Foundation Institute for Medical Research, Biomedicum 2, Tukholmankatu 8, FI-00290, Helsinki, Finland
| | - Maciej Lalowski
- Medicum, Department of Biochemistry and Developmental Biology, Medical Faculty, University of Helsinki, POB 63, FI-00014, Helsinki, Finland
- HiLiFE, Meilahti Clinical Proteomics Core Facility, Helsinki, Finland
| | - Dan Lindholm
- Medicum, Department of Biochemistry and Developmental Biology, Medical Faculty, University of Helsinki, POB 63, FI-00014, Helsinki, Finland.
- Minerva Foundation Institute for Medical Research, Biomedicum 2, Tukholmankatu 8, FI-00290, Helsinki, Finland.
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65
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Wong LW, Tann JY, Ibanez CF, Sajikumar S. The p75 Neurotrophin Receptor Is an Essential Mediator of Impairments in Hippocampal-Dependent Associative Plasticity and Memory Induced by Sleep Deprivation. J Neurosci 2019; 39:5452-5465. [PMID: 31085607 PMCID: PMC6616296 DOI: 10.1523/jneurosci.2876-18.2019] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 05/08/2019] [Accepted: 05/09/2019] [Indexed: 01/22/2023] Open
Abstract
Sleep deprivation (SD) interferes with hippocampal structural and functional plasticity, formation of long-term memory and cognitive function. The molecular mechanisms underlying these effects are incompletely understood. Here, we show that SD impaired synaptic tagging and capture and behavioral tagging, two major mechanisms of associative learning and memory. Strikingly, mutant male mice lacking the p75 neurotrophin receptor (p75NTR) were resistant to the detrimental effects of SD on hippocampal plasticity at both cellular and behavioral levels. Mechanistically, SD increased p75NTR expression and its interaction with phosphodiesterase. p75NTR deletion preserved hippocampal structural and functional plasticity by preventing SD-mediated effects on hippocampal cAMP-CREB-BDNF, cAMP-PKA-LIMK1-cofilin, and RhoA-ROCK2 pathways. Our study identifies p75NTR as an important mediator of hippocampal structural and functional changes associated with SD, and suggests that targeting p75NTR could be a promising strategy to limit the memory and cognitive deficits that accompany sleep loss.SIGNIFICANCE STATEMENT The lack of sufficient sleep is a major health concern in today's world. Sleep deprivation (SD) affects cognitive functions such as memory. We have investigated how associative memory mechanisms, synaptic tagging and capture (STC), was impaired in SD mice at cellular and behavioral level. Interestingly, mutant male mice that lacked the p75 neurotrophin receptor (p75NTR) were seen to be resistant to the SD-induced impairments in hippocampal synaptic plasticity and STC. Additionally, we elucidated the molecular pathways responsible for this rescue of plasticity in the mutant mice. Our study has thus identified p75NTR as a promising target to limit the cognitive deficits associated with SD.
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Affiliation(s)
- Lik-Wei Wong
- Department of Physiology, National University of Singapore, Singapore 117597, Singapore
- Life Sciences Institute Neurobiology Programme, National University of Singapore, Singapore 117456, and
| | - Jason Y Tann
- Department of Physiology, National University of Singapore, Singapore 117597, Singapore
- Life Sciences Institute Neurobiology Programme, National University of Singapore, Singapore 117456, and
| | - Carlos F Ibanez
- Department of Physiology, National University of Singapore, Singapore 117597, Singapore
- Life Sciences Institute Neurobiology Programme, National University of Singapore, Singapore 117456, and
- Department of Cell and Molecular Biology, Karolinska Institute, Stockholm S-17177, Sweden
| | - Sreedharan Sajikumar
- Department of Physiology, National University of Singapore, Singapore 117597, Singapore,
- Life Sciences Institute Neurobiology Programme, National University of Singapore, Singapore 117456, and
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66
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Upregulation of proBDNF in the Mesenteric Lymph Nodes in Septic Mice. Neurotox Res 2019; 36:540-550. [PMID: 31278527 DOI: 10.1007/s12640-019-00081-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 06/12/2019] [Accepted: 06/19/2019] [Indexed: 01/27/2023]
Abstract
The immune status in the lymphatic system, especially mesenteric lymph nodes (MLNs), is critical to regulate the septic shock. Brain-derived neurotrophic factor (BDNF) in the enteric system has been reported to regulate enteric immunity. However, the role of its precursor, proBDNF, in the immune status of MLNs under sepsis condition is still unclear. This study aimed to characterize the expression pattern of proBDNF in MLNs after lipopolysaccharide (LPS) stimulation, and to investigate the association of pathogenesis of sepsis. LPS (20 mg/kg) was intraperitoneally injected to induce sepsis in mice. Survival curve analysis, routine blood tests, and liver and kidney function tests were performed to evaluate the severity of sepsis. QPCR and histological staining were performed to assess the mRNA levels of proinflammatory cytokines and degree of immune-inflammatory response in the MLNs. Furthermore, Western blotting, flow cytometry, and immunofluorescence were performed to examine the key molecules expression of proBDNF signaling. Intraperitoneal LPS injection significantly decreased the number of lymphocytes in blood but increased the number of T lymphocytes in MLNs. Serum alanine transaminase, aspartate transaminase, and blood urea nitrogen levels were increased in LPS-challenged mice compared to control mice. LPS administration upregulated proinflammatory cytokine gene expression and induced histological changes in the MLNs. LPS injection increased BDNF, proBDNF, and its receptor pan neutrophin receptor 75 (p75NTR) expression in MLNs. The increased proBDNF was mainly localized on CD3+ and CD4+ T cells in the medulla of MLNs. LPS-induced sepsis upregulated proBDNF expression in medulla T cells of MLNs. ProBDNF upregulation may be involved in the pathogenesis of septic shock.
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67
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Mufson EJ, Counts SE, Ginsberg SD, Mahady L, Perez SE, Massa SM, Longo FM, Ikonomovic MD. Nerve Growth Factor Pathobiology During the Progression of Alzheimer's Disease. Front Neurosci 2019; 13:533. [PMID: 31312116 PMCID: PMC6613497 DOI: 10.3389/fnins.2019.00533] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 05/08/2019] [Indexed: 12/12/2022] Open
Abstract
The current review summarizes the pathobiology of nerve growth factor (NGF) and its cognate receptors during the progression of Alzheimer's disease (AD). Both transcript and protein data indicate that cholinotrophic neuronal dysfunction is related to an imbalance between TrkA-mediated survival signaling and the NGF precursor (proNGF)/p75NTR-mediated pro-apoptotic signaling, which may be related to alteration in the metabolism of NGF. Data indicate a spatiotemporal pattern of degeneration related to the evolution of tau pathology within cholinotrophic neuronal subgroups located within the nucleus basalis of Meynert (nbM). Despite these degenerative events the cholinotrophic system is capable of cellular resilience and/or plasticity during the prodromal and later stages of the disease. In addition to neurotrophin dysfunction, studies indicate alterations in epigenetically regulated proteins occur within cholinotrophic nbM neurons during the progression of AD, suggesting a mechanism that may underlie changes in transcript expression. Findings that increased cerebrospinal fluid levels of proNGF mark the onset of MCI and the transition to AD suggests that this proneurotrophin is a potential disease biomarker. Novel therapeutics to treat NGF dysfunction include NGF gene therapy and the development of small molecule agonists for the cognate prosurvival NGF receptor TrkA and antagonists against the pan-neurotrophin p75NTR death receptor for the treatment of AD.
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Affiliation(s)
- Elliott J. Mufson
- Department of Neurobiology and Neurology, Department of Neurobiology, and Department of Neurological Sciences, Alzheimer’s Disease Laboratory, Barrow Neurological Institute, St. Joseph’s Medical Center, Phoenix, AZ, United States
| | - Scott E. Counts
- Translational Science and Molecular Medicine Michigan State University College of Human Medicine, Grand Rapids, MI, United States
| | - Stephen D. Ginsberg
- Center for Dementia Research, Nathan Kline Institute, Orangeburg, NY, United States
- Department of Psychiatry, Department of Neuroscience, and Physiology and NYU Neuroscience Institute, New York University Langone Medical Center, New York, NY, United States
| | - Laura Mahady
- Department of Neurobiology and Neurology, Department of Neurobiology, and Department of Neurological Sciences, Alzheimer’s Disease Laboratory, Barrow Neurological Institute, St. Joseph’s Medical Center, Phoenix, AZ, United States
| | - Sylvia E. Perez
- Department of Neurobiology and Neurology, Department of Neurobiology, and Department of Neurological Sciences, Alzheimer’s Disease Laboratory, Barrow Neurological Institute, St. Joseph’s Medical Center, Phoenix, AZ, United States
| | - Stephen M. Massa
- Department of Neurology, San Francisco VA Health Care System, University of California, San Francisco, San Francisco, CA, United States
| | - Frank M. Longo
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, United States
| | - Milos D. Ikonomovic
- Department of Neurology and Department of Psychiatry, Geriatric Research Education and Clinical Center, VA Pittsburgh Healthcare System, University of Pittsburgh, Pittsburgh, PA, United States
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68
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Extracellular RNAs as Biomarkers of Sporadic Amyotrophic Lateral Sclerosis and Other Neurodegenerative Diseases. Int J Mol Sci 2019; 20:ijms20133148. [PMID: 31252669 PMCID: PMC6651127 DOI: 10.3390/ijms20133148] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 06/21/2019] [Accepted: 06/26/2019] [Indexed: 12/13/2022] Open
Abstract
Recent progress in the research for underlying mechanisms in neurodegenerative diseases, including Alzheimer disease (AD), Parkinson disease (PD), and amyotrophic lateral sclerosis (ALS) has led to the development of potentially effective treatment, and hence increased the need for useful biomarkers that may enable early diagnosis and therapeutic monitoring. The deposition of abnormal proteins is a pathological hallmark of neurodegenerative diseases, including β-amyloid in AD, α-synuclein in PD, and the transactive response DNA/RNA binding protein of 43kDa (TDP-43) in ALS. Furthermore, progression of the disease process accompanies the spreading of abnormal proteins. Extracellular proteins and RNAs, including mRNA, micro RNA, and circular RNA, which are present as a composite of exosomes or other forms, play a role in cell–cell communication, and the role of extracellular molecules in the cell-to-cell spreading of pathological processes in neurodegenerative diseases is now in the spotlight. Therefore, extracellular proteins and RNAs are considered potential biomarkers of neurodegenerative diseases, in particular ALS, in which RNA dysregulation has been shown to be involved in the pathogenesis. Here, we review extracellular proteins and RNAs that have been scrutinized as potential biomarkers of neurodegenerative diseases, and discuss the possibility of extracellular RNAs as diagnostic and therapeutic monitoring biomarkers of sporadic ALS.
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69
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Saragovi HU, Galan A, Levin LA. Neuroprotection: Pro-survival and Anti-neurotoxic Mechanisms as Therapeutic Strategies in Neurodegeneration. Front Cell Neurosci 2019; 13:231. [PMID: 31244606 PMCID: PMC6563757 DOI: 10.3389/fncel.2019.00231] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 05/08/2019] [Indexed: 12/14/2022] Open
Abstract
Neurotrophins (NTs) are a subset of the neurotrophic factor family. These growth factors were originally named based on the nerve growth functional assays used to identify them. NTs act as paracrine or autocrine factors for cells expressing NT receptors. The receptors and their function have been studied primarily in cells of the nervous system, but are also present in the cardiovascular, endocrine, and immune systems, as well as in many neoplastic cells. The signals activated by NTs can be varied, depending on cellular stage and context, healthy or disease states, and depending on whether the specific NTs and their receptors are expressed in the relevant cells. In the healthy central and peripheral adult nervous systems, NTs drive neuronal survival, phenotype, synaptic maintenance, and function. Deficiencies of the NT/NT receptor axis are causally associated with disease onset or disease progression. Paradoxically, NTs can also drive synaptic loss and neuronal death. In the embryonic stage this activity is essential for proper developmental pruning of the nervous system, but in the adult it can be associated with neurodegenerative disease. Given their key role in neuronal survival and death, NTs and NT receptors have long been considered therapeutic targets to achieve neuroprotection. The first neuroprotective approaches consisted of enhancing neuronal survival signals using NTs. Later strategies selectively targeted receptors to induce survival signals specifically, while avoiding activation of death signals. Recently, the concept of selectively targeting receptors to reduce neuronal death signals has emerged. Here, we review the rationale of each neuroprotective strategy with respect to the complex cell biology and pharmacology of each target receptor.
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Affiliation(s)
- Horacio Uri Saragovi
- Lady Davis Institute, Montreal, QC, Canada.,Jewish General Hospital, Montreal, QC, Canada.,Department of Ophthalmology and Visual Sciences, McGill University, Montreal, QC, Canada
| | - Alba Galan
- Lady Davis Institute, Montreal, QC, Canada.,Jewish General Hospital, Montreal, QC, Canada
| | - Leonard A Levin
- Department of Ophthalmology and Visual Sciences, McGill University, Montreal, QC, Canada.,McGill University Health Centre, Montreal, QC, Canada.,Montreal Neurological Institute, Mcgill University, Montreal, QC, Canada
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Düsedau HP, Kleveman J, Figueiredo CA, Biswas A, Steffen J, Kliche S, Haak S, Zagrebelsky M, Korte M, Dunay IR. p75 NTR regulates brain mononuclear cell function and neuronal structure in Toxoplasma infection-induced neuroinflammation. Glia 2019; 67:193-211. [PMID: 30597659 PMCID: PMC6590406 DOI: 10.1002/glia.23553] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 09/28/2018] [Accepted: 10/05/2018] [Indexed: 12/13/2022]
Abstract
Neurotrophins mediate neuronal growth, differentiation, and survival via tropomyosin receptor kinase (Trk) or p75 neurotrophin receptor (p75NTR) signaling. The p75NTR is not exclusively expressed by neurons but also by certain immune cells, implying a role for neurotrophin signaling in the immune system. In this study, we investigated the effect of p75NTR on innate immune cell behavior and on neuronal morphology upon chronic Toxoplasma gondii (T. gondii) infection‐induced neuroinflammation. Characterization of the immune cells in the periphery and central nervous system (CNS) revealed that innate immune cell subsets in the brain upregulated p75NTR upon infection in wild‐type mice. Although cell recruitment and phagocytic capacity of p75NTRexonIV knockout (p75−/−) mice were not impaired, the activation status of resident microglia and recruited myeloid cell subsets was altered. Importantly, recruited mononuclear cells in brains of infected p75−/− mice upregulated the production of the cytokines interleukin (IL)‐10, IL‐6 as well as IL‐1α. Protein levels of proBDNF, known to negatively influence neuronal morphology by binding p75NTR, were highly increased upon chronic infection in the brain of wild‐type and p75−/− mice. Moreover, upon infection the activated immune cells contributed to the proBDNF release. Notably, the neuroinflammation‐induced changes in spine density were rescued in the p75−/− mice. In conclusion, these findings indicate that neurotrophin signaling via the p75NTR affects innate immune cell behavior, thus, influencing the structural plasticity of neurons under inflammatory conditions.
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Affiliation(s)
- Henning Peter Düsedau
- Otto-von-Guericke University Magdeburg, Institute of Inflammation and Neurodegeneration, Medical Faculty, Magdeburg, Germany
| | - Jan Kleveman
- Division of Cellular Neurobiology, Zoological Institute, TU Braunschweig, Braunschweig, Germany
| | - Caio Andreeta Figueiredo
- Otto-von-Guericke University Magdeburg, Institute of Inflammation and Neurodegeneration, Medical Faculty, Magdeburg, Germany
| | - Aindrila Biswas
- Otto-von-Guericke University Magdeburg, Institute of Inflammation and Neurodegeneration, Medical Faculty, Magdeburg, Germany
| | - Johannes Steffen
- Otto-von-Guericke University Magdeburg, Institute of Inflammation and Neurodegeneration, Medical Faculty, Magdeburg, Germany
| | - Stefanie Kliche
- Otto-von-Guericke University, Institute for Molecular and Clinical Immunology, Medical Faculty, Magdeburg, Germany
| | - Stefan Haak
- Division of Cellular Neurobiology, Zoological Institute, TU Braunschweig, Braunschweig, Germany
| | - Marta Zagrebelsky
- Division of Cellular Neurobiology, Zoological Institute, TU Braunschweig, Braunschweig, Germany
| | - Martin Korte
- Division of Cellular Neurobiology, Zoological Institute, TU Braunschweig, Braunschweig, Germany
| | - Ildiko Rita Dunay
- Otto-von-Guericke University Magdeburg, Institute of Inflammation and Neurodegeneration, Medical Faculty, Magdeburg, Germany
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71
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Escudero CA, Cabeza C, Moya-Alvarado G, Maloney MT, Flores CM, Wu C, Court FA, Mobley WC, Bronfman FC. c-Jun N-terminal kinase (JNK)-dependent internalization and Rab5-dependent endocytic sorting mediate long-distance retrograde neuronal death induced by axonal BDNF-p75 signaling. Sci Rep 2019; 9:6070. [PMID: 30988348 PMCID: PMC6465280 DOI: 10.1038/s41598-019-42420-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 03/25/2019] [Indexed: 02/01/2023] Open
Abstract
During the development of the sympathetic nervous system, signals from tropomyosin-related kinase receptors (Trks) and p75 neurotrophin receptors (p75) compete to regulate survival and connectivity. During this process, nerve growth factor (NGF)- TrkA signaling in axons communicates NGF-mediated trophic responses in signaling endosomes. Whether axonal p75 signaling contributes to neuronal death and how signaling endosomes contribute to p75 signaling has not been established. Using compartmentalized sympathetic neuronal cultures (CSCGs) as a model, we observed that the addition of BDNF to axons increased the transport of p75 and induced death of sympathetic neurons in a dynein-dependent manner. In cell bodies, internalization of p75 required the activity of JNK, a downstream kinase mediating p75 death signaling in neurons. Additionally, the activity of Rab5, the key GTPase regulating early endosomes, was required for p75 death signaling. In axons, JNK and Rab5 were required for retrograde transport and death signaling mediated by axonal BDNF-p75 in CSCGs. JNK was also required for the proper axonal transport of p75-positive endosomes. Thus, our findings provide evidence that the activation of JNK by p75 in cell bodies and axons is required for internalization to a Rab5-positive signaling endosome and the further propagation of p75-dependent neuronal death signals.
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Affiliation(s)
- C A Escudero
- Center for Aging and Regeneration (CARE UC) and Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - C Cabeza
- Center for Aging and Regeneration (CARE UC) and Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile.,Center of Cellular and Integrative Physiology, Faculty of Medicine, Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - G Moya-Alvarado
- Center for Aging and Regeneration (CARE UC) and Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - M T Maloney
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
| | - C M Flores
- Center for Aging and Regeneration (CARE UC) and Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - C Wu
- Department of Neurosciences, University of California, San Diego, La Jolla, California, 92093, USA
| | - F A Court
- Center for Integrative Biology, Faculty of Sciences, Universidad Mayor, Santiago, Chile and FONDAP Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - W C Mobley
- Department of Neurosciences, University of California, San Diego, La Jolla, California, 92093, USA
| | - F C Bronfman
- Center for Aging and Regeneration (CARE UC) and Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile.
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72
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Abdanipour A, Moradi F, Fakheri F, Ghorbanlou M, Nejatbakhsh R. The effect of lithium chloride on BDNF, NT3, and their receptor mRNA levels in the spinal contusion rat models. Neurol Res 2019; 41:577-583. [DOI: 10.1080/01616412.2019.1588507] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Alireza Abdanipour
- Department of Anatomy, School of Medicine, Zanjan University of Medical Sciences (ZUMS), Zanjan, Iran
| | - Fatemeh Moradi
- Department of Anatomy, School of Medicine, Zanjan University of Medical Sciences (ZUMS), Zanjan, Iran
| | - Farzaneh Fakheri
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
- Young Researchers and Elite Club, Zanjan Branch, Islamic Azad University, Zanjan, Iran
| | - Mehrdad Ghorbanlou
- Department of Anatomy, School of Medicine, Zanjan University of Medical Sciences (ZUMS), Zanjan, Iran
| | - Reza Nejatbakhsh
- Department of Anatomy, School of Medicine, Zanjan University of Medical Sciences (ZUMS), Zanjan, Iran
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73
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Yuan W, Ibáñez CF, Lin Z. Death domain of p75 neurotrophin receptor: a structural perspective on an intracellular signalling hub. Biol Rev Camb Philos Soc 2019; 94:1282-1293. [PMID: 30762293 DOI: 10.1111/brv.12502] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 01/23/2019] [Accepted: 01/24/2019] [Indexed: 12/19/2022]
Abstract
The death domain (DD) is a globular protein motif with a signature feature of an all-helical Greek-key motif. It is a primary mediator of a variety of biological activities, including apoptosis, cell survival and cytoskeletal changes, which are related to many neurodegenerative diseases, neurotrauma, and cancers. DDs exist in a wide range of signalling proteins including p75 neurotrophin receptor (p75NTR ), a member of the tumour necrosis factor receptor superfamily. The specific signalling mediated by p75NTR in a given cell depends on the type of ligand engaging the extracellular domain and the recruitment of cytosolic interactors to the intracellular domain, especially the DD, of the receptor. In solution, the p75NTR -DDs mainly form a symmetric non-covalent homodimer. In response to extracellular signals, conformational changes in the p75NTR extracellular domain (ECD) propagate to the p75NTR -DD through the disulfide-bonded transmembrane domain (TMD) and destabilize the p75NTR -DD homodimer, leading to protomer separation and exposure of binding sites on the DD surface. In this review, we focus on recent advances in the study of the structural mechanism of p75NTR -DD signalling through recruitment of diverse intracellular interactors for the regulation and control of diverse functional outputs.
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Affiliation(s)
- Wensu Yuan
- School of Life Sciences, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Carlos F Ibáñez
- Department of Physiology, National University of Singapore, 117456, Singapore.,Life Sciences Institute, National University of Singapore, 117456, Singapore.,Department of Cell & Molecular Biology, Karolinska Institute, 17165, Stockholm, Sweden
| | - Zhi Lin
- School of Life Sciences, Tianjin University, Tianjin, 300072, People's Republic of China.,Department of Physiology, National University of Singapore, 117456, Singapore.,Life Sciences Institute, National University of Singapore, 117456, Singapore
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74
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Tann JY, Wong LW, Sajikumar S, Ibáñez CF. Abnormal TDP-43 function impairs activity-dependent BDNF secretion, synaptic plasticity, and cognitive behavior through altered Sortilin splicing. EMBO J 2019; 38:embj.2018100989. [PMID: 30692134 DOI: 10.15252/embj.2018100989] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 12/18/2018] [Accepted: 12/20/2018] [Indexed: 12/12/2022] Open
Abstract
Aberrant function of the RNA-binding protein TDP-43 has been causally linked to multiple neurodegenerative diseases. Due to its large number of targets, the mechanisms through which TDP-43 malfunction cause disease are unclear. Here, we report that knockdown, aggregation, or disease-associated mutation of TDP-43 all impair intracellular sorting and activity-dependent secretion of the neurotrophin brain-derived neurotrophic factor (BDNF) through altered splicing of the trafficking receptor Sortilin. Adult mice lacking TDP-43 specifically in hippocampal CA1 show memory impairment and synaptic plasticity defects that can be rescued by restoring Sortilin splicing or extracellular BDNF. Human neurons derived from patient iPSCs carrying mutated TDP-43 also show altered Sortilin splicing and reduced levels of activity-dependent BDNF secretion, which can be restored by correcting the mutation. We propose that major disease phenotypes caused by aberrant TDP-43 activity may be explained by the abnormal function of a handful of critical proteins, such as BDNF.
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Affiliation(s)
- Jason Y Tann
- Department of Physiology, National University of Singapore, Singapore City, Singapore.,Life Sciences Institute, National University of Singapore, Singapore City, Singapore
| | - Lik-Wei Wong
- Department of Physiology, National University of Singapore, Singapore City, Singapore.,Life Sciences Institute, National University of Singapore, Singapore City, Singapore
| | - Sreedharan Sajikumar
- Department of Physiology, National University of Singapore, Singapore City, Singapore.,Life Sciences Institute, National University of Singapore, Singapore City, Singapore
| | - Carlos F Ibáñez
- Department of Physiology, National University of Singapore, Singapore City, Singapore .,Life Sciences Institute, National University of Singapore, Singapore City, Singapore.,Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden
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75
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Xu Z, Shi WH, Xu LB, Shao MF, Chen ZP, Zhu GC, Hou Q. Resident Microglia Activate before Peripheral Monocyte Infiltration and p75NTR Blockade Reduces Microglial Activation and Early Brain Injury after Subarachnoid Hemorrhage. ACS Chem Neurosci 2019; 10:412-423. [PMID: 30117729 DOI: 10.1021/acschemneuro.8b00298] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Early brain injury (EBI) after aneurysmal subarachnoid hemorrhage (SAH) contributes to high morbidity and mortality. Although it is well recognized that acute neuroinflammation reaction is one of the most important triggers of EBI, pharmacotherapy proved to be clinically effective against the initiating of neuroinflammation after SAH is lacking. The resident microglia and infiltrated peripheral monocyte are two main types of immune cells in central nervous system (CNS) and control the inflammation process in brain after SAH. But the time course and relative contributions of these two immune cell activations after SAH are unknown. The p75 neurotrophin receptor (p75NTR), member of TNF receptor superfamily, expresses on infiltrated peripheral monocytes and suppresses their proinflammatory action after brain insults. But the p75NTR expression on resident microglia in vivo is rarely explored and their function keeps elusive. Therefore, we designed this study to investigate the time course of resident microglia activation and peripheral monocyte infiltration, as well as the microglial expression of p75NTR by using CX3C-chemokine receptor 1 (Cx3cr1) and chemokine receptor 2 (Ccr2) double transgenic mice (Cx3cr1GFP/+Ccr2RFP/+) after SAH. The results showed activated microglia was observed in cortex as early as 24 h and further increased at 48 and 72 h post SAH, while the infiltrated monocyte was not found until 72h. In addition, activated microglia expressed p75NTR acutely and p75NTR specific antagonist TAT-Pep5 significantly reduced microglia activation, neuroinflammation and EBI from 24 to 72 h. Together, these data suggest that the early neuroinflammation reaction might be initiated and intensified mainly by resident microglia rather than infiltrated monocyte at least in the first 48 h after SAH and p75NTR blockading by TAT-Pep5P might alleviate EBI through mediating microglial activation.
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Affiliation(s)
- Zhen Xu
- Department of Neurosurgery , First affiliated Hospital of Zhejiang Chinese Medicine University , 54 Youdian Lane , Hangzhou 310006 , China
| | - Wei-Hua Shi
- Department of Neurosurgery , Affiliated Hospital of Nantong University , 20 Xisi Road , Nantong 226001 , China
| | - Long-Biao Xu
- Department of Neurosurgery , Zhuji People's Hospital , 9 Jianmin Lane , Zhuji 311800 , China
| | - Min-Feng Shao
- Department of Nephrology , First People's Hospital of Yuhang District , No. 369 Yingbin Road , Linping, Yuhang, Hangzhou 311100 , China
| | - Zu-Peng Chen
- Department of Neurosurgery , First affiliated Hospital of Zhejiang Chinese Medicine University , 54 Youdian Lane , Hangzhou 310006 , China
| | - Guo-Chong Zhu
- Department of Neurosurgery , First affiliated Hospital of Zhejiang Chinese Medicine University , 54 Youdian Lane , Hangzhou 310006 , China
| | - Qun Hou
- Department of Neurology , First affiliated Hospital of Zhejiang Chinese Medicine University , 54 Youdian Lane , Hangzhou 310006 , China
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76
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McGregor CE, English AW. The Role of BDNF in Peripheral Nerve Regeneration: Activity-Dependent Treatments and Val66Met. Front Cell Neurosci 2019; 12:522. [PMID: 30687012 PMCID: PMC6336700 DOI: 10.3389/fncel.2018.00522] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 12/14/2018] [Indexed: 11/29/2022] Open
Abstract
Despite the ability of peripheral nerves to spontaneously regenerate after injury, recovery is generally very poor. The neurotrophins have emerged as an important modulator of axon regeneration, particularly brain derived neurotrophic factor (BDNF). BDNF regulation and signaling, as well as its role in activity-dependent treatments including electrical stimulation, exercise, and optogenetic stimulation are discussed here. The importance of a single nucleotide polymorphism in the BDNF gene, Val66Met, which is present in 30% of the human population and may hinder the efficacy of these treatments in enhancing regeneration after injury is considered. Preliminary data are presented on the effectiveness of one such activity-dependent treatment, electrical stimulation, in enhancing axon regeneration in mice expressing the met allele of the Val66Met polymorphism.
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Affiliation(s)
- Claire Emma McGregor
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, United States
| | - Arthur W English
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, United States
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77
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Bottasso E. Toward the Existence of a Sympathetic Neuroplasticity Adaptive Mechanism Influencing the Immune Response. A Hypothetical View-Part I. Front Endocrinol (Lausanne) 2019; 10:632. [PMID: 31616373 PMCID: PMC6763740 DOI: 10.3389/fendo.2019.00632] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 08/30/2019] [Indexed: 12/21/2022] Open
Abstract
The nervous system exerts a profound influence on the function of the immune system (IS), mainly through the sympathetic arm of the autonomic nervous system. In fact, the sympathetic nervous system richly innervates secondary lymphoid organs (SLOs) such as the spleen and lymph nodes. For decades, different research groups working in the field have consistently reported changes in the sympathetic innervation of the SLOs during the activation of the IS, which are characterized by a decreased noradrenergic activity and retraction of these fibers. Most of these groups interpreted these changes as a pathological phenomenon, referred to as "damage" or "injury" of the noradrenergic fibers. Some of them postulated that this "injury" was probably due to toxic effects of released endogenous mediators. Others, working on animal models of chronic stimulation of the IS, linked it to the very chronic nature of processes. Unlike these views, this first part of the present work reviews evidence which supports the hypothesis of a specific adaptive mechanism of neural plasticity from sympathetic fibers innervating SLOs, encompassing structural and functional changes of noradrenergic nerves. This plasticity mechanism would involve segmental retraction and degeneration of these fibers during the activation of the IS with subsequent regeneration once the steady state is recovered. The candidate molecules likely to mediate this phenomenon are also here introduced. The second part will extend this view as to the potential changes in sympathetic innervation likely to occur in inflamed non-lymphoid peripheral tissues and its possible immunological implications.
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78
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Changes in neuroplasticity following early-life social adversities: the possible role of brain-derived neurotrophic factor. Pediatr Res 2019; 85:225-233. [PMID: 30341412 DOI: 10.1038/s41390-018-0205-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 10/01/2018] [Accepted: 10/04/2018] [Indexed: 02/06/2023]
Abstract
Social adversities experienced in childhood can have a profound impact on the developing brain, leading to the emergence of psychopathologies in adulthood. Despite the burden this places on both the individual and society, the neurobiological aspects mediating this transition remain unclear. Recent advances in preclinical and clinical research have begun examining neuroplasticity-the nervous system's ability to form adaptive changes in response to new experience-in the context of early-life vulnerability to social adversities and plasticity-related alterations following such traumatic events. A key mediator of plasticity-related molecular processes is the brain-derived neurotrophic factor (BDNF), which has also been implicated in various psychiatric disorders related to childhood social adversities. Preclinical and clinical data suggest early-life social adversities (ELSA) might be associated with accelerated maturation of social network circuitry, a possible ontogenic adaptation to the adverse environment. Neural plasticity decreases by adulthood, lessening the efficacy of treatment in ELSA-related psychiatric disorders. However, literature data suggest that by increasing BDNF/TrkB signalling through antidepressant treatment a juvenile-like plasticity state can be induced, which allows for reorganization of the social circuitry when guided by psychotherapy and surrounded by a safe and positive environment.
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79
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Caspase-3 Mediated Cell Death in the Normal Development of the Mammalian Cerebellum. Int J Mol Sci 2018; 19:ijms19123999. [PMID: 30545052 PMCID: PMC6321612 DOI: 10.3390/ijms19123999] [Citation(s) in RCA: 118] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 12/03/2018] [Accepted: 12/10/2018] [Indexed: 01/08/2023] Open
Abstract
Caspase-3, onto which there is a convergence of the intrinsic and extrinsic apoptotic pathways, is the main executioner of apoptosis. We here review the current literature on the intervention of the protease in the execution of naturally occurring neuronal death (NOND) during cerebellar development. We will consider data on the most common altricial species (rat, mouse and rabbit), as well as humans. Among the different types of neurons and glia in cerebellum, there is ample evidence for an intervention of caspase-3 in the regulation of NOND of the post-mitotic cerebellar granule cells (CGCs) and Purkinje neurons, as a consequence of failure to establish proper synaptic contacts with target (secondary cell death). It seems possible that the GABAergic interneurons also undergo a similar type of secondary cell death, but the intervention of caspase-3 in this case still remains to be clarified in full. Remarkably, CGCs also undergo primary cell death at the precursor/pre-migratory stage of differentiation, in this instance without the intervention of caspase-3. Glial cells, as well, undergo a process of regulated cell death, but it seems possible that expression of caspase-3, at least in the Bergmann glia, is related to differentiation rather than death.
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80
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Qian L, Milne MR, Shepheard S, Rogers ML, Medeiros R, Coulson EJ. Removal of p75 Neurotrophin Receptor Expression from Cholinergic Basal Forebrain Neurons Reduces Amyloid-β Plaque Deposition and Cognitive Impairment in Aged APP/PS1 Mice. Mol Neurobiol 2018; 56:4639-4652. [DOI: 10.1007/s12035-018-1404-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 10/22/2018] [Indexed: 12/14/2022]
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81
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Wallach D. The Tumor Necrosis Factor Family: Family Conventions and Private Idiosyncrasies. Cold Spring Harb Perspect Biol 2018; 10:cshperspect.a028431. [PMID: 28847899 DOI: 10.1101/cshperspect.a028431] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The tumor necrosis factor (TNF) cytokine family and the TNF/nerve growth factor (NGF) family of their cognate receptors together control numerous immune functions, as well as tissue-homeostatic and embryonic-development processes. These diverse functions are dictated by both shared and distinct features of family members, and by interactions of some members with nonfamily ligands and coreceptors. The spectra of their activities are further expanded by the occurrence of the ligands and receptors in both membrane-anchored and soluble forms, by "re-anchoring" of soluble forms to extracellular matrix components, and by signaling initiation via intracellular domains (IDs) of both receptors and ligands. Much has been learned about shared features of the receptors as well as of the ligands; however, we still have only limited knowledge of the mechanistic basis for their functional heterogeneity and for the differences between their functions and those of similarly acting cytokines of other families.
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Affiliation(s)
- David Wallach
- Department of Biomolecular Sciences, The Weizmann Institute of Science, 76100 Rehovot, Israel
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82
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Donnelly CR, Gabreski NA, Suh EB, Chowdhury M, Pierchala BA. Non-canonical Ret signaling augments p75-mediated cell death in developing sympathetic neurons. J Cell Biol 2018; 217:3237-3253. [PMID: 30018091 PMCID: PMC6122988 DOI: 10.1083/jcb.201703120] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 12/15/2017] [Accepted: 06/11/2018] [Indexed: 01/13/2023] Open
Abstract
Programmed cell death (PCD) is an evolutionarily conserved process critical in sculpting many organ systems, yet the underlying mechanisms remain poorly understood. Here, we investigated the interactions of pro-survival and pro-apoptotic receptors in PCD using the sympathetic nervous system as a model. We demonstrate that Ret, a receptor tyrosine kinase required for the survival of many neuronal populations, is restricted to a subset of degenerating neurons that rapidly undergo apoptosis. Pro-apoptotic conditions induce Ret to associate with the death receptor p75. Genetic deletion of p75 within Ret+ neurons, and deletion of Ret during PCD, inhibit apoptosis both in vitro and in vivo. Mechanistically, Ret inhibits nerve growth factor (NGF)-mediated survival of sympathetic neurons. Removal of Ret disrupts NGF-mediated TrkA ubiquitination, leading to increased cell surface levels of TrkA, thereby potentiating survival signaling. Additionally, Ret deletion significantly impairs p75 regulated intramembrane proteolysis cleavage, leading to reduced activation of downstream apoptotic effectors. Collectively, these results indicate that Ret acts non-canonically to augment p75-mediated apoptosis.
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Affiliation(s)
| | - Nicole A Gabreski
- Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI
| | - Esther B Suh
- Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI
| | - Monzurul Chowdhury
- Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI
| | - Brian A Pierchala
- Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI
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83
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Umemori J, Winkel F, Didio G, Llach Pou M, Castrén E. iPlasticity: Induced juvenile-like plasticity in the adult brain as a mechanism of antidepressants. Psychiatry Clin Neurosci 2018; 72:633-653. [PMID: 29802758 PMCID: PMC6174980 DOI: 10.1111/pcn.12683] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/25/2018] [Indexed: 12/11/2022]
Abstract
The network hypothesis of depression proposes that mood disorders reflect problems in information processing within particular neural networks. Antidepressants (AD), including selective serotonin reuptake inhibitors (SSRI), function by gradually improving information processing within these networks. AD have been shown to induce a state of juvenile-like plasticity comparable to that observed during developmental critical periods: Such critical-period-like plasticity allows brain networks to better adapt to extrinsic and intrinsic signals. We have coined this drug-induced state of juvenile-like plasticity 'iPlasticity.' A combination of iPlasticity induced by chronic SSRI treatment together with training, rehabilitation, or psychotherapy improves symptoms of neuropsychiatric disorders and issues underlying the developmentally or genetically malfunctioning networks. We have proposed that iPlasticity might be a critical component of AD action. We have demonstrated that iPlasticity occurs in the visual cortex, fear erasure network, extinction of aggression caused by social isolation, and spatial reversal memory in rodent models. Chronic SSRI treatment is known to promote neurogenesis and to cause dematuration of granule cells in the dentate gyrus and of interneurons, especially parvalbumin interneurons enwrapped by perineuronal nets in the prefrontal cortex, visual cortex, and amygdala. Brain-derived neurotrophic factor (BDNF), via its receptor tropomyosin kinase receptor B, is involved in the processes of synaptic plasticity, including neurogenesis, neuronal differentiation, weight of synapses, and gene regulation of synaptic formation. BDNF can be activated by both chronic SSRI treatment and neuronal activity. Accordingly, the BDNF/tropomyosin kinase receptor B pathway is critical for iPlasticity, but further analyses will be needed to provide mechanical insight into the processes of iPlasticity.
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Affiliation(s)
- Juzoh Umemori
- Neuroscience Center, HiLIFEUniversity of HelsinkiHelsinkiFinland
| | - Frederike Winkel
- Neuroscience Center, HiLIFEUniversity of HelsinkiHelsinkiFinland
| | - Giuliano Didio
- Neuroscience Center, HiLIFEUniversity of HelsinkiHelsinkiFinland
| | - Maria Llach Pou
- Neuroscience Center, HiLIFEUniversity of HelsinkiHelsinkiFinland
| | - Eero Castrén
- Neuroscience Center, HiLIFEUniversity of HelsinkiHelsinkiFinland
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84
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The ProNGF/p75NTR pathway induces tau pathology and is a therapeutic target for FTLD-tau. Mol Psychiatry 2018; 23:1813-1824. [PMID: 29867188 DOI: 10.1038/s41380-018-0071-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 01/26/2018] [Accepted: 03/26/2018] [Indexed: 11/09/2022]
Abstract
Tau pathology is characterized as a form of frontotemporal lobar degeneration (FTLD) known as FTLD-tau. The underlying pathogenic mechanisms are not known and no therapeutic interventions are currently available. Here, we report that the neurotrophin receptor p75NTR plays a critical role in the pathogenesis of FTLD-tau. The expression of p75NTR and the precursor of nerve growth factor (proNGF) were increased in the brains of FTLD-tau patients and mice (P301L transgenic). ProNGF-induced tau phosphorylation via p75NTR in vitro, which was associated with the AKT/glycogen synthase kinase (GSK)3β pathway. Genetic reduction of p75NTR in P301L mice rescued the memory deficits, alleviated tau hyperphosphorylation and restored the activity of the AKT/GSK3β pathway. Treatment of the P301L mice with the soluble p75NTR extracellular domain (p75ECD-Fc), which can antagonize neurotoxic ligands of p75NTR, effectively improved memory behavior and suppressed tau pathology. This suggests that p75NTR plays a crucial role in tau paGSKthology and represents a potential druggable target for FTLD-tau and related tauopathies.
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85
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Mehrabi S, Janahamdi M, Joghataie MT, Barati M, Marzban M, Hadjighassem M, Farahmandfar M. Blockade of p75 Neurotrophin Receptor Reverses Irritability and Anxiety-Related Behaviors in a Rat Model of Status Epilepticus. IRANIAN BIOMEDICAL JOURNAL 2018; 22:264-74. [PMID: 29108398 PMCID: PMC5949129 DOI: 10.22034/ibj.22.4.264] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 09/20/2017] [Accepted: 09/25/2017] [Indexed: 11/28/2022]
Abstract
Background Many recent epidemiological studies have shown that epileptic patients are more likely suffer from depression, anxiety, and irritability. However, the cellular mechanisms of epilepsy-induced psychotic behaviors are not fully elucidated. Neurotrophin receptors have been suggested to be involved in epilepsy and also in psychiatric disorders. Up-regulation of p75NTR expression and activation of p75NTR signalling cascades after the seizure have been shown, but the role of the p75 receptor in epilepsy-induced psychotic behaviors has not been documented so far. Therefore, the present work aimed to investigate the effect of p75 receptor blockade on seizure activity, irritability, and anxiety-like behaviors in a rat model of status epilepticus. Methods Rats were injected with pilocarpine (350 mg/ kg, i.p.) to induce status epilepticus. Then various behavioral tests were performed after the blockade of p75NTR alone or in combination with p75 antagonist and phenobarbital. Molecular analysis by PCR was performed to investigate the expression of p75 and pro-NGF. Results Molecular findings indicated a high level of mRNA expression for both p75 receptors and pro-NGF in the epileptic model group. Results also showed that the administration of p75 antagonist alone or in combination with phenobarbital was able to significantly influence the behavioral responses. Furthermore, 20-hours video monitoring showed a decrease in the frequency and duration of seizures in the rat group receiving p75 antagonist. Conclusion Taken together, the present study suggests that the blockade of the p75 receptor may affect the irritability and anxiety-related behavior in a rat model of status epilepticus.
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Affiliation(s)
- Soraya Mehrabi
- Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahyar Janahamdi
- Neuroscience Research Center and Department of Physiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Taghi Joghataie
- Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
- Department of Neuroscience, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mahmood Barati
- Department of pharmaceutical biotechnology, School of pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohsen Marzban
- Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmoudreza Hadjighassem
- Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
- Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Farahmandfar
- Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
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86
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Osborne A, Wang AX, Tassoni A, Widdowson PS, Martin KR. Design of a Novel Gene Therapy Construct to Achieve Sustained Brain-Derived Neurotrophic Factor Signaling in Neurons. Hum Gene Ther 2018; 29:828-841. [PMID: 29466871 PMCID: PMC6066195 DOI: 10.1089/hum.2017.069] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 02/19/2018] [Indexed: 12/22/2022] Open
Abstract
Brain-derived neurotrophic factor (BDNF) acting through the tropomyosin-related receptor-B (TrkB) is an important signaling system for the maintenance and survival of neurons. Gene therapy using either recombinant adeno-associated virus (AAV) or lentiviral vectors can provide sustained delivery of BDNF to tissues where reduced BDNF signaling is hypothesized to contribute to disease pathophysiology. However, elevation in BDNF at target sites has been shown to lead to a downregulation of TrkB receptors, thereby reducing the effect of chronic BDNF delivery over time. A novel gene sequence has been designed coding both the ligand (BDNF) and the TrkB receptor in a single transgene separated by a short viral-2A sequence. The single transgene is efficiently processed intracellularly in vitro and in vivo to yield the two mature proteins, which are then independently transported to their final cellular locations: TrkB receptors to the cell surface, and BDNF contained within secretory vesicles. To accommodate the coding sequences of both BDNF and TrkB receptors within the narrow confines of the AAV vectors (4.7 kb pairs), the coding region for the pro-domain of BDNF was removed and the signal peptide sequence modified to improve production, intracellular transport, and secretion of mature BDNF (mBDNF). Intracellular processing and efficacy was shown in HEK293 cells and SH-SY5Y neuroblastoma cells using plasmid DNA and after incorporating the TrkB-2A-mBDNF into an AAV2 vector. Increased BDNF/TrkB-mediated intracellular signaling pathways were observed after AAV2 vector transfection while increased TrkB phosphorylation could be detected in combination with neuroprotection from hydrogen peroxide-induced oxidative stress. Correct processing was also shown in vivo in mouse retinal ganglion cells after AAV2 vector administration to the eye. This novel construct is currently being investigated for its efficacy in animal models to determine its potential to progress to human clinical studies in the future.
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Affiliation(s)
- Andrew Osborne
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, Cambridge, United Kingdom
- Quethera Ltd., Babraham Research Campus, Cambridge, United Kingdom
| | - Aiden X.Z. Wang
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, Cambridge, United Kingdom
| | - Alessia Tassoni
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, Cambridge, United Kingdom
| | | | - Keith R. Martin
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, Cambridge, United Kingdom
- Quethera Ltd., Babraham Research Campus, Cambridge, United Kingdom
- Cambridge NIHR Biomedical Research Centre, Cambridge, United Kingdom
- Eye Department, Addenbrooke's Hospital, Cambridge, United Kingdom
- Wellcome Trust—MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, United Kingdom
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87
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Becker K, Cana A, Baumgärtner W, Spitzbarth I. p75 Neurotrophin Receptor: A Double-Edged Sword in Pathology and Regeneration of the Central Nervous System. Vet Pathol 2018; 55:786-801. [PMID: 29940812 DOI: 10.1177/0300985818781930] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The low-affinity nerve growth factor receptor p75NTR is a major neurotrophin receptor involved in manifold and pleiotropic functions in the developing and adult central nervous system (CNS). Although known for decades, its entire functions are far from being fully elucidated. Depending on the complex interactions with other receptors and on the cellular context, p75NTR is capable of performing contradictory tasks such as mediating cell death as well as cell survival. In parallel, as a prototype marker for certain differentiation stages of Schwann cells and related CNS aldynoglial cells, p75NTR has recently gained increasing notice as a marker for cells with proposed regenerative potential in CNS diseases, such as demyelinating disease and traumatic CNS injury. Besides its pivotal role as a marker for transplantation candidate cells, recent studies in canine neuroinflammatory CNS conditions also highlight a spontaneous endogenous occurrence of p75NTR-positive glia, which potentially play a role in Schwann cell-mediated CNS remyelination. The aim of the present communication is to review the pleiotropic functions of p75NTR in the CNS with a special emphasis on its role as an immunohistochemical marker in neuropathology. Following a brief illustration of the expression of p75NTR in neurogenesis and in developed neuronal populations, the implications of p75NTR expression in astrocytes, oligodendrocytes, and microglia are addressed. A special focus is put on the role of p75NTR as a cell marker for specific differentiation stages of Schwann cells and a regeneration-promoting CNS population, collectively referred to as aldynoglia.
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Affiliation(s)
- Kathrin Becker
- 1 Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Armend Cana
- 1 Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany.,2 Center for Systems Neuroscience, Hannover, Germany
| | - Wolfgang Baumgärtner
- 1 Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany.,2 Center for Systems Neuroscience, Hannover, Germany
| | - Ingo Spitzbarth
- 1 Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany.,2 Center for Systems Neuroscience, Hannover, Germany
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88
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Mañucat-Tan NB, Saadipour K, Wang YJ, Bobrovskaya L, Zhou XF. Cellular Trafficking of Amyloid Precursor Protein in Amyloidogenesis Physiological and Pathological Significance. Mol Neurobiol 2018; 56:812-830. [PMID: 29797184 DOI: 10.1007/s12035-018-1106-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 05/03/2018] [Indexed: 12/26/2022]
Abstract
The accumulation of excess intracellular or extracellular amyloid beta (Aβ) is one of the key pathological events in Alzheimer's disease (AD). Aβ is generated from the cleavage of amyloid precursor protein (APP) by beta secretase-1 (BACE1) and gamma secretase (γ-secretase) within the cells. The endocytic trafficking of APP facilitates amyloidogenesis while at the cell surface, APP is predominantly processed in a non-amyloidogenic manner. Several adaptor proteins bind to both APP and BACE1, regulating their trafficking and recycling along the secretory and endocytic pathways. The phosphorylation of APP at Thr668 and BACE1 at Ser498, also influence their trafficking. Neurotrophins and proneurotrophins also influence APP trafficking through their receptors. In this review, we describe the molecular trafficking pathways of APP and BACE1 that lead to Aβ generation, the involvement of different signaling molecules or adaptor proteins regulating APP and BACE1 subcellular localization. We have also discussed how neurotrophins could modulate amyloidogenesis through their receptors.
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Affiliation(s)
- Noralyn Basco Mañucat-Tan
- School of Pharmacy and Medical Sciences, Sansom Institute for Health Research, University of South Australia, Adelaide, South Australia, 5000, Australia.
| | - Khalil Saadipour
- Departments of Cell Biology, Physiology and Neuroscience, and Psychiatry, Skirball Institute of Biomolecular Medicine, New York University Langone School of Medicine, New York, NY, USA
| | - Yan-Jiang Wang
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
| | - Larisa Bobrovskaya
- School of Pharmacy and Medical Sciences, Sansom Institute for Health Research, University of South Australia, Adelaide, South Australia, 5000, Australia
| | - Xin-Fu Zhou
- School of Pharmacy and Medical Sciences, Sansom Institute for Health Research, University of South Australia, Adelaide, South Australia, 5000, Australia.
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89
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Gestational stress in mouse dams negatively affects gestation and postpartum hippocampal BDNF and P11 protein levels. Mol Cell Neurosci 2018; 88:292-299. [DOI: 10.1016/j.mcn.2018.02.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 01/31/2018] [Accepted: 02/26/2018] [Indexed: 11/23/2022] Open
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90
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Alemi R, Motassadi Zarandy M, Joghataei MT, Eftekharian A, Zarrindast MR, Vousooghi N. Plasticity after pediatric cochlear implantation: Implication from changes in peripheral plasma level of BDNF and auditory nerve responses. Int J Pediatr Otorhinolaryngol 2018; 105:103-110. [PMID: 29447794 DOI: 10.1016/j.ijporl.2017.12.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 12/09/2017] [Accepted: 12/12/2017] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Sensory neural hearing loss could lead to some structural and physiological changes in the auditory pathways, such as alteration in the expression of neurotrophins. These factors, especially Brain-Derived Neurotrophic Factor (BDNF), play an important role in synaptic functions and experience-related plasticity. Restoring cochlear function after hearing loss is possible through cochlear implantation (CI). Evaluation of the blood concentration changes of neurotrophins as prerequisites of plasticity could help scientists to determine the prognosis of CI as in the candidacy procedure or enhancing prosthesis function by adding the exact needed amount of BDNF to the electrode array. METHODS Here we have studied the plasma BDNF concentration before CI surgery and 6 months after using CI device in 15 pediatric CI recipients and compared this level with changes of BDNF concentration in 10 children who were using hearing aid (H.A). In addition, we searched for a possible correlation between post-surgery plasma BDNF concentration and electrical compound action potential (ECAP) and comfort-level (C-level) thresholds. RESULTS Plasma BDNF concentration in children with CI increased significantly after CI surgery, while this difference in H.A group was not significant. Analysis of repeated measures of ECAP and C-level thresholds in CI group showed that there were some kinds of steadiness during follow- up sessions for ECAP thresholds in basal and E16 of middle electrodes, whereas C-level thresholds for all selected electrodes increased significantly up to six months follow-up. Interestingly, we did not find any significant correlation between post-surgery plasma BDNF concentration and ECAP or C-level threshold changes. CONCLUSION It is concluded that changes in C-level threshold and steady state of ECAP thresholds and significant changes in BDNF concentration could be regarded as an indicator of experienced-related plasticity after CI stimulation.
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Affiliation(s)
- Razieh Alemi
- Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran; Cochlear Implant Center and Department of Otorhinolaryngology, Amir Aalam Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Masoud Motassadi Zarandy
- Cochlear Implant Center and Department of Otorhinolaryngology, Amir Aalam Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Taghi Joghataei
- Division of Neuroscience, Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Neuroscience, School of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Ali Eftekharian
- Department of Otorhinolaryngology, Loghman Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Zarrindast
- Genetics Laboratory, Iranian National Center for Addiction Studies (INCAS), Tehran University of Medical Sciences, Tehran, Iran; Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Department of Cognitive Neuroscience, Institute for Cognitive Science Studies, Tehran, Iran; Genomic Center, School of Advanced Sciences, Tehran Medical Branch, Islamic Azad University, Tehran, Iran
| | - Nasim Vousooghi
- Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran; Genetics Laboratory, Iranian National Center for Addiction Studies (INCAS), Tehran University of Medical Sciences, Tehran, Iran; Research Center for Cognitive and Behavioral Sciences, Tehran University of Medical Sciences, Tehran, Iran.
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91
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p75NTR and TROY: Uncharted Roles of Nogo Receptor Complex in Experimental Autoimmune Encephalomyelitis. Mol Neurobiol 2018; 55:6329-6336. [PMID: 29294247 DOI: 10.1007/s12035-017-0841-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 12/14/2017] [Indexed: 12/11/2022]
Abstract
Multiple sclerosis (MS) and its animal model, experimental autoimmune encephalomyelitis (EAE), have been on the forefront of drug discovery for most of the myelin inhibitory molecules implicated in axonal regenerative process. Nogo-A along with its putative receptor NgR and co-receptor LINGO-1 has paved the way for the production of pharmaceutical agents such as monoclonal antibodies, which are already put into handful of clinical trials. On the other side, little progress has been made towards clarifying the role of neurotrophin receptor p75 (p75NTR) and TROY in disease progression, other key players of the Nogo receptor complex. Previous work of our lab has shown that their exact location and type of expression is harmonized in a phase-dependent manner. Here, in this review, we outline their façade in normal and diseased central nervous system (CNS) and suggest a role for p75NTR in chronic axonal regeneration whereas TROY in acute inflammation of EAE intercourse.
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92
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Abstract
The neurotrophins are a family of closely related proteins that were first identified as survival factors for sympathetic and sensory neurons and have since been shown to control a number of aspects of survival, development, and function of neurons in both the central and peripheral nervous systems. Limiting quantities of neurotrophins during development control the numbers of surviving neurons to ensure a match between neurons and the requirement for a suitable density of target innervation. Biological effects of each of the four mammalian neurotrophins are mediated through activation of one or more of the three members of the tropomyosin-related kinase (Trk) family of receptor tyrosine kinases (TrkA, TrkB, and TrkC). In addition, all neurotrophins activate the p75 neurotrophin receptor (p75NTR), a member of the tumor necrosis factor receptor superfamily. Neurotrophin engagement of Trk receptors leads to activation of Ras, phosphatidylinositol 3-kinase, phospholipase C-γ1, and signaling pathways controlled through these proteins, including the mitogen-activated protein kinases. Neurotrophin availability is required into adulthood, where they control synaptic function and plasticity and sustain neuronal cell survival, morphology, and differentiation. This article will provide an overview of neurotrophin biology, their receptors, and signaling pathways.
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Affiliation(s)
- Stephen D Skaper
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Padua, Italy.
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93
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Chitranshi N, Dheer Y, Abbasi M, You Y, Graham SL, Gupta V. Glaucoma Pathogenesis and Neurotrophins: Focus on the Molecular and Genetic Basis for Therapeutic Prospects. Curr Neuropharmacol 2018; 16:1018-1035. [PMID: 29676228 PMCID: PMC6120108 DOI: 10.2174/1570159x16666180419121247] [Citation(s) in RCA: 54] [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: 07/02/2017] [Revised: 04/10/2018] [Accepted: 04/18/2018] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Retinal ganglion cell (RGC) degeneration is a major feature of glaucoma pathology. Neuroprotective approaches that delay or halt the progression of RGC loss are needed to prevent vision loss which can occur even after conventional medical or surgical treatments to lower intraocular pressure. OBJECTIVE The aim of this review was to examine the progress in genetics and cellular mechanisms associated with endoplasmic reticulum (ER) stress, RGC dysfunction and cell death pathways in glaucoma. MATERIALS AND METHODS Here, we review the involvement of neurotrophins like brain derived neurotrophic factor (BDNF) and its high affinity receptor tropomyosin receptor kinase (TrkB) in glaucoma. The role of ER stress markers in human and animal retinas in health and disease conditions is also discussed. Further, we analysed the literature highlighting genetic linkage in the context of primary open angle glaucoma and suggested mechanistic insights into potential therapeutic options relevant to glaucoma management. RESULTS The literature review of the neurobiology underlying neurotrophin pathways, ER stress and gene associations provide critical insights into association of RGCs death in glaucoma. Alteration in signalling pathway is associated with increased risk of misfolded protein aggregation in ER promoting RGC apoptosis. Several genes that are linked with neurotrophin signalling pathways have been reported to be associated with glaucoma pathology. CONCLUSION Understanding genetic heterogeneity and involvement of neurotrophin biology in glaucoma could help to understand the complex pathophysiology of glaucoma. Identification of novel molecular targets will be critical for drug development and provide neuroprotection to the RGCs and optic nerve.
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Affiliation(s)
- Nitin Chitranshi
- Address correspondence to this author at the Faculty of Medicine and Health Sciences, 75, Talavera Road, Macquarie University, Sydney, NSW 2109, Australia; Tel: +61-298502760; E-mail:
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94
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Li G, Liu J, Zhao M, Wang Y, Yang K, Liu C, Xiao Y, Wen X, Liu L. SOST, an LNGFR target, inhibits the osteogenic differentiation of rat ectomesenchymal stem cells. Cell Prolif 2017; 51:e12412. [PMID: 29226516 DOI: 10.1111/cpr.12412] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 10/26/2017] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVES The aim of this study was to investigate whether sclerostin (SOST) regulates the osteogenic differentiation of rat ectomesenchymal stem cells (EMSCs) and whether SOST and low-affinity nerve growth factor receptor (LNGFR) regulate the osteogenic differentiation of EMSCs. MATERIALS AND METHODS EMSCs were isolated from embryonic facial processes from an embryonic 12.5-day (E12.5d) pregnant Sprague-Dawley rat. LNGFR+ EMSCs and LNGFR- EMSCs were obtained by fluorescence-activated cell sorting and were subsequently induced to undergo osteogenic differentiation in vitro. SOST/LNGFR small-interfering RNAs and SOST/LNGFR overexpression plasmids were used to transfect EMSCs. RESULTS LNGFR+ EMSCs displayed a higher osteogenic capacity and lower SOST levels compared with LNGFR- EMSCs. SOST silencing enhanced the osteogenic differentiation of LNGFR- EMSCs, while SOST overexpression attenuated the osteogenic differentiation of LNGFR+ EMSCs. Moreover, LNGFR was present upstream of SOST and strengthened the osteogenic differentiation of EMSCs by decreasing SOST. CONCLUSIONS SOST alleviated the osteogenic differentiation of EMSCs, and LNGFR enhanced the osteogenic differentiation of EMSCs by decreasing SOST, suggesting that the LNGFR/SOST pathway may be a novel target for promoting dental tissue regeneration and engineering.
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Affiliation(s)
- Gang Li
- Department of Stomatology, Daping Hospital, Research Institute of Field Surgery, Third Military Medical University, Chongqing, China
| | - Junyu Liu
- Department of Stomatology, Daping Hospital, Research Institute of Field Surgery, Third Military Medical University, Chongqing, China
| | - Manzhu Zhao
- Stomatological Hospital of Chongqing Medical University, Chongqing, China
| | - Yingying Wang
- Department of Stomatology, Daping Hospital, Research Institute of Field Surgery, Third Military Medical University, Chongqing, China
| | - Kun Yang
- Department of Periodontology, Stomatological Hospital, Zunyi Medical College, Zunyi, Guizhou, China
| | - Chang Liu
- Department of Stomatology, Daping Hospital, Research Institute of Field Surgery, Third Military Medical University, Chongqing, China
| | - Yong Xiao
- Department of Stomatology, Daping Hospital, Research Institute of Field Surgery, Third Military Medical University, Chongqing, China
| | - Xiujie Wen
- Department of Stomatology, Daping Hospital, Research Institute of Field Surgery, Third Military Medical University, Chongqing, China
| | - Luchuan Liu
- Department of Stomatology, Daping Hospital, Research Institute of Field Surgery, Third Military Medical University, Chongqing, China
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95
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Uemura T, Shiroshima T, Maeda A, Yasumura M, Shimada T, Fukata Y, Fukata M, Yoshida T. In situ screening for postsynaptic cell adhesion molecules during synapse formation. J Biochem 2017; 162:295-302. [PMID: 28449070 DOI: 10.1093/jb/mvx030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 04/13/2017] [Indexed: 01/01/2023] Open
Abstract
Neuronal synapse formation is regulated by pre- and postsynaptic cell adhesion molecules. Presynaptic neurexins (NRXNs) and receptor protein tyrosine phosphatases (RPTPs; PTPδ, PTPσ and LAR in mammals) can induce postsynaptic differentiation through the interaction with various postsynaptic cell adhesion molecules. Here, we developed a novel in situ screening method to identify postsynaptic membranous proteins involved in synaptogenesis. Magnetic beads coated with the extracellular domains of NRXN1β(-S4) and PTPδ-A6 variants preferentially induced excitatory postsynaptic differentiation on the beads' surface when co-cultured with cortical neurons. After inducing postsynaptic sites on these beads, protein complexes including NRXN1β(-S4)/PTPδ-A6 and their ligands on the neuronal membrane were chemically cross-linked and purified using a magnetic separator. Liquid chromatography-tandem mass spectrometry analysis of the complexes revealed two types of postsynaptic ligands for NRXN1β(-S4) and PTPδ-A6, one has an activity to induce presynaptic differentiation in a trans manner, whereas the other has no such activity. These results suggest that synapse formation is regulated by the interplay between presynaptic NRXN/PTPδ and their postsynaptic ligands with functionally different impacts on pre- and postsynaptic differentiation. Thus, our in situ screening method for identifying synapse-organizing complexes will help to understand the molecular basis for elaborate neuronal networks.
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Affiliation(s)
- Takeshi Uemura
- Department of Molecular and Cellular Physiology, Institute of Medicine, Academic Assembly, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.,Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.,CREST, JST, 4-1-8 Hon-cho, Kawaguchi, Saitama 332-0012, Japan
| | - Tomoko Shiroshima
- Department of Molecular Neurobiology and Pharmacology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0073, Japan
| | - Asami Maeda
- Department of Molecular Neurobiology and Pharmacology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0073, Japan
| | - Misato Yasumura
- Department of Anatomy and Neuroscience, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takashi Shimada
- Technology Research Laboratory, SHIMADZU Corporation, 380-1 Horiyamashita, Hadano, Kanagawa 259-1304, Japan
| | - Yuko Fukata
- Division of Membrane Physiology, Department of Molecular and Cellular Physiology, National Institute for Physiological Sciences, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - Masaki Fukata
- Division of Membrane Physiology, Department of Molecular and Cellular Physiology, National Institute for Physiological Sciences, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - Tomoyuki Yoshida
- Department of Molecular Neuroscience, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194, Japan.,PRESTO, JST, 4-1-8 Hon-cho, Kawaguchi, Saitama 332-0012, Japan
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96
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May LM, Anggono V, Gooch HM, Jang SE, Matusica D, Kerbler GM, Meunier FA, Sah P, Coulson EJ. G-Protein-Coupled Inwardly Rectifying Potassium (GIRK) Channel Activation by the p75 Neurotrophin Receptor Is Required for Amyloid β Toxicity. Front Neurosci 2017; 11:455. [PMID: 28848381 PMCID: PMC5550722 DOI: 10.3389/fnins.2017.00455] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 07/26/2017] [Indexed: 02/05/2023] Open
Abstract
Alzheimer's disease is characterized by cognitive decline, neuronal degeneration, and the accumulation of amyloid-beta (Aβ). Although, the neurotoxic Aβ peptide is widely believed to trigger neuronal dysfunction and degeneration in Alzheimer's disease, the mechanism by which this occurs is poorly defined. Here we describe a novel, Aβ-triggered apoptotic pathway in which Aβ treatment leads to the upregulation of G-protein activated inwardly rectifying potassium (GIRK/Kir3) channels, causing potassium efflux from neurons and Aβ-mediated apoptosis. Although, GIRK channel activity is required for Aβ-induced neuronal degeneration, we show that it is not sufficient, with coincident signaling by the p75 neurotrophin receptor (p75NTR) also required for potassium efflux and cell death. Our results identify a novel role for GIRK channels in mediating apoptosis, and provide a previously missing mechanistic link between the excitotoxicity of Aβ and its ability to trigger cell death pathways, such as that mediated by p75NTR. We propose that this death-signaling pathway contributes to the dysfunction of neurons in Alzheimer's disease and is responsible for their eventual degeneration.
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Affiliation(s)
- Linda M May
- Queensland Brain Institute, University of QueenslandBrisbane, QLD, Australia
| | - Victor Anggono
- Queensland Brain Institute, University of QueenslandBrisbane, QLD, Australia.,Clem Jones Centre for Ageing Dementia Research, University of QueenslandBrisbane, QLD, Australia
| | - Helen M Gooch
- Queensland Brain Institute, University of QueenslandBrisbane, QLD, Australia
| | - Se E Jang
- Queensland Brain Institute, University of QueenslandBrisbane, QLD, Australia.,Clem Jones Centre for Ageing Dementia Research, University of QueenslandBrisbane, QLD, Australia
| | - Dusan Matusica
- Queensland Brain Institute, University of QueenslandBrisbane, QLD, Australia.,Centre for Neuroscience, College of Medicine and Public Health, Flinders UniversityAdelaide, SA, Australia
| | - Georg M Kerbler
- Queensland Brain Institute, University of QueenslandBrisbane, QLD, Australia
| | - Frederic A Meunier
- Queensland Brain Institute, University of QueenslandBrisbane, QLD, Australia.,Clem Jones Centre for Ageing Dementia Research, University of QueenslandBrisbane, QLD, Australia
| | - Pankaj Sah
- Queensland Brain Institute, University of QueenslandBrisbane, QLD, Australia
| | - Elizabeth J Coulson
- Queensland Brain Institute, University of QueenslandBrisbane, QLD, Australia.,Clem Jones Centre for Ageing Dementia Research, University of QueenslandBrisbane, QLD, Australia.,School of Biomedical Sciences, University of QueenslandBrisbane, QLD, Australia
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97
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Castrén E, Antila H. Neuronal plasticity and neurotrophic factors in drug responses. Mol Psychiatry 2017; 22:1085-1095. [PMID: 28397840 PMCID: PMC5510719 DOI: 10.1038/mp.2017.61] [Citation(s) in RCA: 162] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Revised: 02/13/2017] [Accepted: 02/16/2017] [Indexed: 02/07/2023]
Abstract
Neurotrophic factors, particularly brain-derived neurotrophic factor (BDNF) and other members of the neurotrophin family, are central mediators of the activity-dependent plasticity through which environmental experiences, such as sensory information are translated into the structure and function of neuronal networks. Synthesis, release and action of BDNF is regulated by neuronal activity and BDNF in turn leads to trophic effects such as formation, stabilization and potentiation of synapses through its high-affinity TrkB receptors. Several clinically available drugs activate neurotrophin signaling and neuronal plasticity. In particular, antidepressant drugs rapidly activate TrkB signaling and gradually increase BDNF expression, and the behavioral effects of antidepressants are mediated by and dependent on BDNF signaling through TrkB at least in rodents. These findings indicate that antidepressants, widely used drugs, effectively act as TrkB activators. They further imply that neuronal plasticity is a central mechanism in the action of antidepressant drugs. Indeed, it was recently discovered that antidepressants reactivate a state of plasticity in the adult cerebral cortex that closely resembles the enhanced plasticity normally observed during postnatal critical periods. This state of induced plasticity, known as iPlasticity, allows environmental stimuli to beneficially reorganize networks abnormally wired during early life. iPlasticity has been observed in cortical as well as subcortical networks and is induced by several pharmacological and non-pharmacological treatments. iPlasticity is a new pharmacological principle where drug treatment and rehabilitation cooperate; the drug acts permissively to enhance plasticity and rehabilitation provides activity to guide the appropriate wiring of the plastic network. Optimization of iPlastic drug treatment with novel means of rehabilitation may help improve the efficacy of available drug treatments and expand the use of currently existing drugs into new indications.
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98
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Platón-Corchado M, Barcelona PF, Jmaeff S, Marchena M, Hernández-Pinto AM, Hernández-Sánchez C, Saragovi HU, de la Rosa EJ. p75 NTR antagonists attenuate photoreceptor cell loss in murine models of retinitis pigmentosa. Cell Death Dis 2017; 8:e2922. [PMID: 28703796 PMCID: PMC5550853 DOI: 10.1038/cddis.2017.306] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 04/26/2017] [Accepted: 05/29/2017] [Indexed: 12/23/2022]
Abstract
ProNGF signaling through p75NTR has been associated with neurodegenerative disorders. Retinitis pigmentosa (RP) comprises a group of inherited retinal dystrophies that causes progressive photoreceptor cell degeneration and death, at a rate dependent on the genetic mutation. There are more than 300 mutations causing RP, and this is a challenge to therapy. Our study was designed to explore a common mechanism for p75NTR in the progression of RP, and assess its potential value as a therapeutic target. The proNGF/p75NTR system is present in the dystrophic retina of the rd10 RP mouse model. Compared with wild-type (WT) retina, the levels of unprocessed proNGF were increased in the rd10 retina at early degenerative stages, before the peak of photoreceptor cell death. Conversely, processed NGF levels were similar in rd10 and WT retinas. ProNGF remained elevated throughout the period of photoreceptor cell loss, correlating with increased expression of α2-macroglobulin, an inhibitor of proNGF processing. The neuroprotective effect of blocking p75NTR was assessed in organotypic retinal cultures from rd10 and RhoP mouse models. Retinal explants treated with p75NTR antagonists showed significantly reduced photoreceptor cell death, as determined by the terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) assay and by preservation of the thickness of the outer nuclear layer (ONL), where photoreceptor nuclei are located. This effect was accompanied by decreased retinal-reactive gliosis and reduced TNFα secretion. Use of p75NTR antagonist THX-B (1,3-diisopropyl-1-[2-(1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-purin-7-yl)-acetyl]-urea) in vivo in the rd10 and RhoP mouse models, by a single intravitreal or subconjunctival injection, afforded neuroprotection to photoreceptor cells, with preservation of the ONL. This study demonstrates a role of the p75NTR/proNGF axis in the progression of RP, and validates these proteins as therapeutic targets in two different RP models, suggesting utility irrespective of etiology.
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Affiliation(s)
| | - Pablo F Barcelona
- Lady Davis Institute-Jewish General Hospital, McGill University, Montreal, QC, Canada
| | - Sean Jmaeff
- Lady Davis Institute-Jewish General Hospital, McGill University, Montreal, QC, Canada
| | | | | | | | - H Uri Saragovi
- Lady Davis Institute-Jewish General Hospital, McGill University, Montreal, QC, Canada
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99
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Urinary Extracellular Domain of Neurotrophin Receptor p75 as a Biomarker for Amyotrophic Lateral Sclerosis in a Chinese cohort. Sci Rep 2017; 7:5127. [PMID: 28698670 PMCID: PMC5506052 DOI: 10.1038/s41598-017-05430-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 05/30/2017] [Indexed: 11/09/2022] Open
Abstract
To comprehensively assess whether p75ECD in urine could be a candidate biomarker for ALS evaluation. Urine samples were collected from 101 ALS patients, 108 patients with other neurological disease (OND) and 97 healthy controls. 61 ALS patients were followed up with clinical data including ALSFRS-r every 6 to 12 months, 23 ALS patients died and 17 ALS patients lost touch during follow up period. Enzyme-linked immunoassay was employed to determine urine p75ECD concentration. The ALSFRS-r was employed to assess the severity of ALS. The concentration of p75ECD in ALS was significantly higher than that of OND and CTRL (p < 0.001). Additionally, urine p75ECD concentrations in ALS-definite grade patients were significantly higher than that in ALS-probable grade and ALS-possible grade patients (p < 0.001). Higher urine p75ECD concentrations were correlated with increased clinical stage (p = 0.0309); urine p75ECD concentrations and ALSFRS-r were negatively correlated (p = 0.022); and urine p75ECD concentration in the fast-progressing ALS group was significantly higher than that in slow-progression (p = 0.0026). Our finding indicates that urine p75ECD concentration provides additional evidence for patients with clinically suspected ALS, and can be employed to evaluate ALS-severity.
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100
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Marcos J, Galleguillos D, Pelissier T, Hernández A, Velásquez L, Villanueva L, Constandil L. Role of the spinal TrkB-NMDA receptor link in the BDNF-induced long-lasting mechanical hyperalgesia in the rat: A behavioural study. Eur J Pain 2017; 21:1688-1696. [DOI: 10.1002/ejp.1075] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/29/2017] [Indexed: 11/05/2022]
Affiliation(s)
- J.L. Marcos
- Laboratory of Neurobiology; Department of Biology; Faculty of Chemistry and Biology; University of Santiago of Chile; Chile
- Laboratory of Veterinary Pharmacology and Therapeutics; School of Veterinary Science; Viña del Mar University; Chile
| | - D. Galleguillos
- Laboratory of Neurobiology; Department of Biology; Faculty of Chemistry and Biology; University of Santiago of Chile; Chile
| | - T. Pelissier
- Program of Molecular and Clinical Pharmacology; Institute of Biomedical Sciences (ICBM); Faculty of Medicine; University of Chile; Santiago Chile
| | - A. Hernández
- Laboratory of Neurobiology; Department of Biology; Faculty of Chemistry and Biology; University of Santiago of Chile; Chile
| | - L. Velásquez
- Center for Integrative Medicine and Innovative Science (CIMIS); Faculty of Medicine; Andres Bello University; Santiago Chile
| | - L. Villanueva
- Centre de Psychiatrie et Neurosciences; INSERM UMR 894; Paris France
| | - L. Constandil
- Laboratory of Neurobiology; Department of Biology; Faculty of Chemistry and Biology; University of Santiago of Chile; Chile
- Center for the Development of Nanoscience and Nanotechnology (CEDENNA); University of Santiago of Chile; Chile
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