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Shim HG, Jang SS, Kim SH, Hwang EM, Min JO, Kim HY, Kim YS, Ryu C, Chung G, Kim Y, Yoon BE, Kim SJ. TNF-α increases the intrinsic excitability of cerebellar Purkinje cells through elevating glutamate release in Bergmann Glia. Sci Rep 2018; 8:11589. [PMID: 30072733 PMCID: PMC6072779 DOI: 10.1038/s41598-018-29786-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 07/18/2018] [Indexed: 11/17/2022] Open
Abstract
For decades, the glial function has been highlighted not only as the ‘structural glue’, but also as an ‘active participant’ in neural circuits. Here, we suggest that tumor necrosis factor α (TNF-α), a key inflammatory cytokine, alters the neural activity of the cerebellar Purkinje cells (PCs) by facilitating gliotransmission in the juvenile male rat cerebellum. A bath application of TNF-α (100 ng/ml) in acute cerebellar slices elevates spiking activity of PCs with no alterations in the regularity of PC firings. Interestingly, the effect of TNF-α on the intrinsic excitability of PCs was abolished under a condition in which the type1 TNF receptor (TNFR1) in Bergmann glia (BG) was genetically suppressed by viral delivery of an adeno-associated virus (AAV) containing TNFR1-shRNA. In addition, we measured the concentration of glutamate derived from dissociated cerebellar cortical astrocyte cultures treated with TNF-α and observed a progressive increase of glutamate in a time-dependent manner. We hypothesised that TNF-α-induced elevation of glutamate from BGs enveloping the synaptic cleft may directly activate metabotropic glutamate receptor1 (mGluR1). Pharmacological inhibition of mGluR1, indeed, prevented the TNF-α-mediated elevation of the intrinsic excitability in PCs. Taken together, our study reveals that TNF-α triggers glutamate release in BG, thereby increasing the intrinsic excitability of cerebellar PCs in a mGluR1-dependent manner.
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Affiliation(s)
- Hyun Geun Shim
- Department of Physiology, Seoul National University College of Medicine, Seoul, Korea.,Department of Biomedical Science, Seoul National University College of Medicine, Seoul, Korea
| | - Sung-Soo Jang
- Department of Physiology, Seoul National University College of Medicine, Seoul, Korea.,Neuroscience Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Seung Ha Kim
- Department of Physiology, Seoul National University College of Medicine, Seoul, Korea.,Department of Biomedical Science, Seoul National University College of Medicine, Seoul, Korea
| | - Eun Mi Hwang
- Center for Functional Connectomics, Korea Institute of Science and Technology, Seoul, Korea
| | - Joo Ok Min
- Department of Molecular biology, Dankook University, Chungnam, Korea
| | - Hye Yun Kim
- Department of Pharmacy and Integrated Science and Engineering Division, Yonsei University, Incheon, Korea
| | - Yoo Sung Kim
- Department of Molecular biology, Dankook University, Chungnam, Korea
| | - Changhyeon Ryu
- Department of Physiology, Seoul National University College of Medicine, Seoul, Korea.,Department of Biomedical Science, Seoul National University College of Medicine, Seoul, Korea.,Neuroscience Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Geehoon Chung
- Department of Physiology, Seoul National University College of Medicine, Seoul, Korea.,Department of Brain and Cognitive Science, College of Science, Seoul National University, Seoul, Korea
| | - YoungSoo Kim
- Department of Pharmacy and Integrated Science and Engineering Division, Yonsei University, Incheon, Korea
| | - Bo-Eun Yoon
- Department of Molecular biology, Dankook University, Chungnam, Korea
| | - Sang Jeong Kim
- Department of Physiology, Seoul National University College of Medicine, Seoul, Korea. .,Department of Biomedical Science, Seoul National University College of Medicine, Seoul, Korea. .,Neuroscience Research Institute, Seoul National University College of Medicine, Seoul, Korea.
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2
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Malekizadeh Y, Holiday A, Redfearn D, Ainge JA, Doherty G, Harvey J. A Leptin Fragment Mirrors the Cognitive Enhancing and Neuroprotective Actions of Leptin. Cereb Cortex 2018; 27:4769-4782. [PMID: 27600840 DOI: 10.1093/cercor/bhw272] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 08/02/2016] [Indexed: 01/22/2023] Open
Abstract
A key pathology of Alzheimer's disease (AD) is amyloid β (Aβ) accumulation that triggers synaptic impairments and neuronal death. Metabolic disruption is common in AD and recent evidence implicates impaired leptin function in AD. Thus the leptin system may be a novel therapeutic target in AD. Indeed, leptin has cognitive enhancing properties and it prevents the aberrant effects of Aβ on hippocampal synaptic function and neuronal viability. However, as leptin is a large peptide, development of smaller leptin-mimetics may be the best therapeutic approach. Thus, we have examined the cognitive enhancing and neuroprotective properties of known bioactive leptin fragments. Here we show that the leptin (116-130) fragment, but not leptin (22-56), mirrored the ability of leptin to promote AMPA receptor trafficking to synapses and facilitate activity-dependent hippocampal synaptic plasticity. Administration of leptin (116-130) also mirrored the cognitive enhancing effects of leptin as it enhanced performance in episodic-like memory tests. Moreover, leptin (116-130) prevented hippocampal synaptic disruption and neuronal cell death in models of amyloid toxicity. These findings establish further the importance of the leptin system as a therapeutic target in AD.
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Affiliation(s)
- Yasaman Malekizadeh
- Division of Neuroscience, Medical Research Institute, Ninewells Hospital and Medical School, University of Dundee, DundeeDD1 9SY, UK
| | - Alison Holiday
- School of Psychology and Neuroscience, St Mary's Quad, University of St Andrews, St Andrews, FifeKY16 9TS, UK
| | - Devon Redfearn
- School of Psychology and Neuroscience, St Mary's Quad, University of St Andrews, St Andrews, FifeKY16 9TS, UK
| | - James A Ainge
- School of Psychology and Neuroscience, St Mary's Quad, University of St Andrews, St Andrews, FifeKY16 9TS, UK
| | - Gayle Doherty
- School of Psychology and Neuroscience, St Mary's Quad, University of St Andrews, St Andrews, FifeKY16 9TS, UK
| | - Jenni Harvey
- Division of Neuroscience, Medical Research Institute, Ninewells Hospital and Medical School, University of Dundee, DundeeDD1 9SY, UK
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3
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DeLuca GC, Kimball SM, Kolasinski J, Ramagopalan SV, Ebers GC. Review: the role of vitamin D in nervous system health and disease. Neuropathol Appl Neurobiol 2014; 39:458-84. [PMID: 23336971 DOI: 10.1111/nan.12020] [Citation(s) in RCA: 212] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Accepted: 01/16/2013] [Indexed: 12/13/2022]
Abstract
Vitamin D and its metabolites have pleomorphic roles in both nervous system health and disease. Animal models have been paramount in contributing to our knowledge and understanding of the consequences of vitamin D deficiency on brain development and its implications for adult psychiatric and neurological diseases. The conflation of in vitro, ex vivo, and animal model data provide compelling evidence that vitamin D has a crucial role in proliferation, differentiation, neurotrophism, neuroprotection, neurotransmission, and neuroplasticity. Vitamin D exerts its biological function not only by influencing cellular processes directly, but also by influencing gene expression through vitamin D response elements. This review highlights the epidemiological, neuropathological, experimental and molecular genetic evidence implicating vitamin D as a candidate in influencing susceptibility to a number of psychiatric and neurological diseases. The strength of evidence varies for schizophrenia, autism, Parkinson's disease, amyotrophic lateral sclerosis, Alzheimer's disease, and is especially strong for multiple sclerosis.
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Affiliation(s)
- G C DeLuca
- Nuffield Department of Clinical Neurosciences (Clinical Neurology), University of Oxford, Oxford, UK.
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4
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Studying the cerebellar DNA damage response in the tissue culture dish. Mech Ageing Dev 2013; 134:496-505. [DOI: 10.1016/j.mad.2013.04.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 03/29/2013] [Accepted: 04/01/2013] [Indexed: 11/30/2022]
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5
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Abd-El-Basse EM. Pro-inflammatory cytokine; tumor-necrosis factor-alpha (TNF-α) inhibits astrocytic support of neuronal survival and neurites outgrowth. ADVANCES IN BIOSCIENCE AND BIOTECHNOLOGY 2013; 04:73-80. [DOI: 10.4236/abb.2013.48a2010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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6
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Doherty GH, Beccano-Kelly D, Yan SD, Gunn-Moore FJ, Harvey J. Leptin prevents hippocampal synaptic disruption and neuronal cell death induced by amyloid β. Neurobiol Aging 2013; 34:226-37. [PMID: 22921154 DOI: 10.1016/j.neurobiolaging.2012.08.003] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Revised: 08/01/2012] [Accepted: 08/02/2012] [Indexed: 11/24/2022]
Abstract
Accumulation of amyloid-β (Aβ) is a key event mediating the cognitive deficits in Alzheimer's disease (AD) as Aβ promotes synaptic dysfunction and triggers neuronal death. Recent evidence has linked the hormone leptin to AD as leptin levels are markedly attenuated in AD patients. Leptin is also a potential cognitive enhancer as it facilitates the cellular events underlying hippocampal learning and memory. Here we show that leptin prevents the detrimental effects of Aβ(1-42) on hippocampal long-term potentiation. Moreover leptin inhibits Aβ(1-42)-driven facilitation of long-term depression and internalization of the 2-amino-3-(5-methyl-3-oxo-1,2- oxazol-4-yl)propanoic acid (AMPA) receptor subunit, GluR1, via activation of PI3-kinase. Leptin also protects cortical neurons from Aβ(1-42)-induced cell death by a signal transducer and activator of transcription-3 (STAT-3)-dependent mechanism. Furthermore, leptin inhibits Aβ(1-42)-mediated upregulation of endophilin I and phosphorylated tau in vitro, whereas cortical levels of endophilin I and phosphorylated tau are enhanced in leptin-insensitive Zucker fa/fa rats. Thus leptin benefits the functional characteristics and viability of neurons that degenerate in AD. These novel findings establish that the leptin system is an important therapeutic target in neurodegenerative conditions.
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Affiliation(s)
- Gayle H Doherty
- School of Biology, University of St. Andrews, St. Andrews, Fife, Scotland, UK
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Young AMH, Campbell EC, Lynch S, Dunn MH, Powis SJ, Suckling J. Regional susceptibility to TNF-α induction of murine brain inflammation via classical IKK/NF-κB signalling. PLoS One 2012; 7:e39049. [PMID: 22701747 PMCID: PMC3372464 DOI: 10.1371/journal.pone.0039049] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Accepted: 05/16/2012] [Indexed: 11/18/2022] Open
Abstract
It is becoming clear that inflammation plays a significant role in a number of neurological and psychiatric conditions. Post mortem brain samples in Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, multiple sclerosis, schizophrenia and most recently autism spectrum condition, all exhibit neuroglial activation and inflammatory markers within the CSF. Many questions remain about the underlying molecular mechanisms. By adding the pro-inflammatory cytokine, TNF-α, to mouse brain tissue we demonstrated that the frontal lobes and temporal region, areas involved in higher functions such as memory and learning, are most susceptible to cytokine-induced inflammation via the NF-κB signalling pathway. We observed direct correlations between the volumetric increase and molecular expression indicating that therapeutic targets in these lobes may require different approaches when treating conditions with a central neuroinflammatory component.
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Affiliation(s)
- Adam M. H. Young
- School of Medicine, University of St. Andrews, Fife, Scotland, United Kingdom
- School of Clinical Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Elaine C. Campbell
- School of Medicine, University of St. Andrews, Fife, Scotland, United Kingdom
| | - Sarah Lynch
- School of Medicine, University of St. Andrews, Fife, Scotland, United Kingdom
| | - Malcolm H. Dunn
- School of Physics and Astronomy, University of St. Andrews, Fife, Scotland, United Kingdom
| | - Simon J. Powis
- School of Medicine, University of St. Andrews, Fife, Scotland, United Kingdom
| | - John Suckling
- School of Clinical Medicine, University of Cambridge, Cambridge, United Kingdom
- Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom
- * E-mail:
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von Ehrenstein OS, Neta GI, Andrews W, Goldenberg R, Goepfert A, Zhang J. Child intellectual development in relation to cytokine levels in umbilical cord blood. Am J Epidemiol 2012; 175:1191-9. [PMID: 22508393 DOI: 10.1093/aje/kwr393] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Although cytokines play a dual role in the developing neurologic system and in prenatal immune reactions, relations between fetal cytokine levels and child intellectual development remain unknown. The authors investigated associations between umbilical cord serum cytokine concentrations and intellectual outcomes in 369 children within a prospective cohort study, the Eunice Kennedy Shriver National Institute of Child Health and Human Development-University of Alabama Infant Growth Study (1985-1988). Concentrations of interferon-γ (IFN-γ), tumor necrosis factor-α (TNF-α), and interleukins 4, 10, and 12p70 were determined. The Wechsler Preschool and Primary Scale of Intelligence-Revised was administered at age 5 years, producing verbal and performance intelligence quotients (VIQ and PIQ); associations with each cytokine were evaluated using linear and logistic regression. Log-unit increases in IFN-γ (adjusted odds ratio (aOR) = 0.67, 95% confidence interval (CI): 0.46, 0.98) and interleukin-12p70 (aOR = 0.43, 95% CI: 0.21, 0.87) were inversely associated with low PIQ (score <70). One log-unit increase in TNF-α was associated with a reduced odds ratio for low VIQ (score <70) among preterm children (aOR = 0.11, 95% CI: 0.01, 0.94) and an elevated odds ratio for low VIQ among small-for-gestational-age children (aOR = 3.96, 95% CI: 0.99, 15.9). IFN-γ, which is involved in neurogenesis and perinatal adaptive immunity, may be related to fetal neurologic development overall, while TNF-α may be a marker of intellectual development in vulnerable subgroups.
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Affiliation(s)
- Ondine S von Ehrenstein
- Department of Community Health Sciences, School of Public Health, University of California, Los Angeles, 90095-1772, USA.
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9
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[Expression of IFN-γ, IL-1α, NGF-β and TNF-α during the development of cerebellar cortex of Western Anhui white goose]. DONG WU XUE YAN JIU = ZOOLOGICAL RESEARCH 2012; 33:211-7. [PMID: 22467398 DOI: 10.3724/sp.j.1141.2012.02211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The strep avidin-biotin-peroxidase complex (SABC) immunohistochemical methods were applied to investigate the localization and semi-quantitative distribution of IFN-γ, IL-1α, NGF-β and TNF-α-immunoreactive cells in the cerebellar cortex of Western Anhui white goose at embryonic day 13, 19, 24, 28 (E13, E19, E24, E28) and postnatal day 7, 15 (P7, P15). The possible roles of IFN-γ,IL-1α,NGF-β and TNF-α in the development of cerebellar cortex were discussed. The results indicated that in the external granular layer, there were IFN-γ and TNF-α positive cells at E13, E19, E24, E28, P7, IL-1α positive cells at E13, E19, E24, E28 and NGF-β positive cells at E13, E19 , E24. The expression levels of these four cytokines all reached peaks at E19 of the six tested periods in this study. In the Purkinje cell layer, there were IFN-γ, IL-1α and TNF-α positive cells at E13, E19, E24, E28, P7, P15 and NGF-β positive cells at E13, E19, E24, E28, P7. In the internal granular layer, there were IFN-γ positive cells at E13, E19, E24, E28, P7, P15, IL-1α and TNF-α positive cells at E13, E19, E24, E28, P7 and NGF-β positive cells at E13, E19, E24, E28. These results showed that E19 might be the "critical stage"in the cerebellar cortex development of Western Anhui white goose. IFN-γ, IL-1α and TNF-α might be synthesized by cerebellar cortex itself, and NGF-β could be transported from regions which project to Purkinje cells. IFN-γ may interfer the transfer of granular cells, and NGF-β may have neurotrophic functions that are beneficial to the growth and development of Purkinje cells.
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10
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Twohig JP, Cuff SM, Yong AA, Wang ECY. The role of tumor necrosis factor receptor superfamily members in mammalian brain development, function and homeostasis. Rev Neurosci 2011; 22:509-33. [PMID: 21861782 DOI: 10.1515/rns.2011.041] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Tumor necrosis factor receptor superfamily (TNFRSF) members were initially identified as immunological mediators, and are still commonly perceived as immunological molecules. However, our understanding of the diversity of TNFRSF members' roles in mammalian physiology has grown significantly since the first discovery of TNFRp55 (TNFRSF1) in 1975. In particular, the last decade has provided evidence for important roles in brain development, function and the emergent field of neuronal homeostasis. Recent evidence suggests that TNFRSF members are expressed in an overlapping regulated pattern during neuronal development, participating in the regulation of neuronal expansion, growth, differentiation and regional pattern development. This review examines evidence for non-immunological roles of TNFRSF members in brain development, function and maintenance under normal physiological conditions. In addition, several aspects of brain function during inflammation will also be described, when illuminating and relevant to the non-immunological role of TNFRSF members. Finally, key questions in the field will be outlined.
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Affiliation(s)
- Jason P Twohig
- Department of Infection, Immunity and Biochemistry, School of Medicine, Cardiff University, Heath Park, Cardiff CF14 4XN, Wales, UK
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Kozuki M, Kurata T, Miyazaki K, Morimoto N, Ohta Y, Ikeda Y, Abe K. Atorvastatin and pitavastatin protect cerebellar Purkinje cells in AD model mice and preserve the cytokines MCP-1 and TNF-α. Brain Res 2011; 1388:32-8. [DOI: 10.1016/j.brainres.2011.03.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Revised: 03/04/2011] [Accepted: 03/09/2011] [Indexed: 10/18/2022]
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