1
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Teng Z. Novel Development and Prospects in Pathogenesis, Diagnosis, and Therapy of Alzheimer's Disease. J Alzheimers Dis Rep 2024; 8:345-354. [PMID: 38405339 PMCID: PMC10894614 DOI: 10.3233/adr-230130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 12/29/2023] [Indexed: 02/27/2024] Open
Abstract
Alzheimer's disease (AD) is the most prevalent neurodegenerative disease with cognitive decline and behavioral dysfunction. AD will become a global public health concern due to its increasing prevalence brought on by the severity of global aging. It is critical to understand the pathogenic mechanisms of AD and investigate or pursue a viable therapy strategy in clinic. Amyloid-β (Aβ) accumulation and abnormally hyperphosphorylated tau protein are the main regulating variables in the pathological phase of AD. And neuroinflammation brought on by activated microglia was found to be one risk factor contributing to changes in Aβ and tau pathology. It is important to investigate the unique biomarkers of early diagnosis and advanced stage, which may help to elucidate the specific pathological process of AD and provide potential novel therapeutic targets or preventative measures.
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Affiliation(s)
- Zenghui Teng
- Medical Faculty, Institute of Neuro- and Sensory Physiology, Heinrich-Heine-University Düsseldorf, Germany
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2
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Merchant JP, Zhu K, Henrion MYR, Zaidi SSA, Lau B, Moein S, Alamprese ML, Pearse RV, Bennett DA, Ertekin-Taner N, Young-Pearse TL, Chang R. Predictive network analysis identifies JMJD6 and other potential key drivers in Alzheimer's disease. Commun Biol 2023; 6:503. [PMID: 37188718 PMCID: PMC10185548 DOI: 10.1038/s42003-023-04791-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 03/31/2023] [Indexed: 05/17/2023] Open
Abstract
Despite decades of genetic studies on late-onset Alzheimer's disease, the underlying molecular mechanisms remain unclear. To better comprehend its complex etiology, we use an integrative approach to build robust predictive (causal) network models using two large human multi-omics datasets. We delineate bulk-tissue gene expression into single cell-type gene expression and integrate clinical and pathologic traits, single nucleotide variation, and deconvoluted gene expression for the construction of cell type-specific predictive network models. Here, we focus on neuron-specific network models and prioritize 19 predicted key drivers modulating Alzheimer's pathology, which we then validate by knockdown in human induced pluripotent stem cell-derived neurons. We find that neuronal knockdown of 10 of the 19 targets significantly modulates levels of amyloid-beta and/or phosphorylated tau peptides, most notably JMJD6. We also confirm our network structure by RNA sequencing in the neurons following knockdown of each of the 10 targets, which additionally predicts that they are upstream regulators of REST and VGF. Our work thus identifies robust neuronal key drivers of the Alzheimer's-associated network state which may represent therapeutic targets with relevance to both amyloid and tau pathology in Alzheimer's disease.
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Affiliation(s)
- Julie P Merchant
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
- Neuroscience Graduate Group, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Kuixi Zhu
- The Center for Innovation in Brain Sciences, University of Arizona, Tucson, AZ, USA
| | - Marc Y R Henrion
- Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, Pembroke Place, L3 5QA, UK
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, PO Box 30096, Blantyre, Malawi
| | - Syed S A Zaidi
- The Center for Innovation in Brain Sciences, University of Arizona, Tucson, AZ, USA
| | - Branden Lau
- The Center for Innovation in Brain Sciences, University of Arizona, Tucson, AZ, USA
- Arizona Research Labs, Genetics Core, University of Arizona, Tucson, AZ, USA
| | - Sara Moein
- The Center for Innovation in Brain Sciences, University of Arizona, Tucson, AZ, USA
| | - Melissa L Alamprese
- The Center for Innovation in Brain Sciences, University of Arizona, Tucson, AZ, USA
| | - Richard V Pearse
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - David A Bennett
- Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA
| | - Nilüfer Ertekin-Taner
- Department of Neuroscience, Mayo Clinic Florida, Jacksonville, FL, USA
- Department of Neurology, Mayo Clinic Florida, Jacksonville, FL, USA
| | - Tracy L Young-Pearse
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
- Harvard Stem Cell Institute, Harvard University, Boston, MA, USA.
| | - Rui Chang
- The Center for Innovation in Brain Sciences, University of Arizona, Tucson, AZ, USA.
- Department of Neurology, University of Arizona, Tucson, AZ, USA.
- INTelico Therapeutics LLC, Tucson, AZ, USA.
- PATH Biotech LLC, Tucson, AZ, USA.
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3
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Isik FI, Katzeff JS, Fu Y, Kim WS. Understanding the Role of CDH4 in Multiple System Atrophy Brain. JOURNAL OF PARKINSON'S DISEASE 2023; 13:1303-1311. [PMID: 38143373 PMCID: PMC10741323 DOI: 10.3233/jpd-230298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/11/2023] [Indexed: 12/26/2023]
Abstract
BACKGROUND Multiple system atrophy (MSA) is a rapidly progressive neurodegenerative disease clinically characterized by parkinsonism, cerebellar ataxia, and autonomic dysfunction. A major pathological feature of MSA is the presence of α-synuclein aggregates in oligodendrocytes, the myelinating cells of the central nervous system. A genome-wide association study revealed that the CDH4 gene is associated with MSA. However, virtually nothing is known about the role of CDH4 in the context of MSA. OBJECTIVE Our aim was to compare the expression of CDH4 between MSA and control brains, and to investigate its relationship with α-synuclein in oligodendrocytes. METHODS RNA and protein were prepared from putamen, motor cortex white matter, cerebellum, and superior occipital cortex tissues collected from MSA (N = 11) and control (N = 13) brains. The expression of CDH4 was measured at mRNA and protein levels by qPCR and western blotting. Oligodendrocyte cells were cultured on plates and transfected with CDH4 cDNA and its impact on α-synuclein was analyzed. RESULTS Firstly, we found that CDH4 in MSA brain was significantly elevated in the disease-affected motor cortex white matter in MSA (N = 11) compared to controls (N = 13) and unaltered in the disease-unaffected superior occipital cortex. Secondly, we determined that increases in CDH4 expression caused changes in the cellular levels of α-synuclein in oligodendrocytes. CONCLUSIONS When put together, these results provide evidence that support the GWAS association of CDH4 with MSA.
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Affiliation(s)
- Finula I. Isik
- Brain and Mind Centre & School of Medical Sciences, The University of Sydney, Sydney NSW, Australia
| | - Jared S. Katzeff
- Brain and Mind Centre & School of Medical Sciences, The University of Sydney, Sydney NSW, Australia
| | - YuHong Fu
- Brain and Mind Centre & School of Medical Sciences, The University of Sydney, Sydney NSW, Australia
| | - Woojin Scott Kim
- Brain and Mind Centre & School of Medical Sciences, The University of Sydney, Sydney NSW, Australia
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4
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László ZI, Lele Z. Flying under the radar: CDH2 (N-cadherin), an important hub molecule in neurodevelopmental and neurodegenerative diseases. Front Neurosci 2022; 16:972059. [PMID: 36213737 PMCID: PMC9539934 DOI: 10.3389/fnins.2022.972059] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 08/31/2022] [Indexed: 12/03/2022] Open
Abstract
CDH2 belongs to the classic cadherin family of Ca2+-dependent cell adhesion molecules with a meticulously described dual role in cell adhesion and β-catenin signaling. During CNS development, CDH2 is involved in a wide range of processes including maintenance of neuroepithelial integrity, neural tube closure (neurulation), confinement of radial glia progenitor cells (RGPCs) to the ventricular zone and maintaining their proliferation-differentiation balance, postmitotic neural precursor migration, axon guidance, synaptic development and maintenance. In the past few years, direct and indirect evidence linked CDH2 to various neurological diseases, and in this review, we summarize recent developments regarding CDH2 function and its involvement in pathological alterations of the CNS.
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Affiliation(s)
- Zsófia I. László
- Momentum Laboratory of Molecular Neurobiology, Institute of Experimental Medicine, Budapest, Hungary
- Division of Cellular and Systems Medicine, School of Medicine, University of Dundee, Dundee, United Kingdom
| | - Zsolt Lele
- Momentum Laboratory of Molecular Neurobiology, Institute of Experimental Medicine, Budapest, Hungary
- *Correspondence: Zsolt Lele,
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5
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Finding New Ways How to Control BACE1. J Membr Biol 2022; 255:293-318. [PMID: 35305135 DOI: 10.1007/s00232-022-00225-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 02/24/2022] [Indexed: 01/18/2023]
Abstract
Recently, all applications of BACE1 inhibitors failed as therapeutical targets for Alzheimer´s disease (AD) due to severe side effects. Therefore, alternative ways for treatment development are a hot research topic. The present analysis investigates BACE1 protein-protein interaction networks and attempts to solve the absence of complete knowledge about pathways involving BACE1. A bioinformatics analysis matched the functions of the non-substrate interaction network with Voltage-gated potassium channels, which also appear as top priority protein nodes. Targeting BACE1 interactions with PS1 and GGA-s, blocking of BACE1 access to APP by BRI3 and RTN-s, activation of Wnt signaling and upregulation of β-catenin, and brain delivery of the extracellular domain of p75NTR, are the main alternatives to the use of BACE 1 inhibitors highlighted by the analysis. The pathway enrichment analysis also emphasized substrates and substrate candidates with essential biological functions, which cleavage must remain controlled. They include ephrin receptors, ROBO1, ROBO2, CNTN-s, CASPR-s, CD147, CypB, TTR, APLP1/APLP2, NRXN-s, and PTPR-s. The analysis of the interaction subnetwork of BACE1 functionally related to inflammation identified a connection to three cardiomyopathies, which supports the hypothesis of the common molecular mechanisms with AD. A lot of potential shows the regulation of BACE1 activity through post-translational modifications. The interaction network of BACE1 and its phosphorylation enzyme CSNK1D functionally match the Circadian clock, p53, and Hedgehog signaling pathways. The regulation of BACE1 glycosylation could be achieved through N-acetylglucosamine transferases, α-(1→6)-fucosyltransferase, β-galactoside α-(2→6)-sialyltransferases, galactosyltransferases, and mannosidases suggested by the interaction network analysis of BACE1-MGAT3. The present analysis proposes possibilities for the alternative control of AD pathology.
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Dagar S, Teng Z, Gottmann K. Transsynaptic N-Cadherin Adhesion Complexes Control Presynaptic Vesicle and Bulk Endocytosis at Physiological Temperature. Front Cell Neurosci 2021; 15:713693. [PMID: 34759800 PMCID: PMC8573734 DOI: 10.3389/fncel.2021.713693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Accepted: 09/13/2021] [Indexed: 11/30/2022] Open
Abstract
At mammalian glutamatergic synapses, most basic elements of synaptic transmission have been shown to be modulated by specific transsynaptic adhesion complexes. However, although crucial for synapse homeostasis, a physiological regulation of synaptic vesicle endocytosis by adhesion molecules has not been firmly established. The homophilic adhesion protein N-cadherin is localized at the peri-active zone, where the highly temperature-dependent endocytosis of vesicles occurs. Here, we demonstrate an important modulatory role of N-cadherin in endocytosis at near physiological temperature by synaptophysin-pHluorin imaging. Different modes of endocytosis including bulk endocytosis were dependent on N-cadherin expression and function. N-cadherin modulation might be mediated by actin filaments because actin polymerization ameliorated the knockout-induced endocytosis defect. Using super-resolution imaging, we found strong recruitment of N-cadherin to glutamatergic synapses upon massive vesicle release, which might in turn enhance vesicle endocytosis. This provides a novel, adhesion protein-mediated mechanism for efficient coupling of exo- and endocytosis.
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Affiliation(s)
- Sushma Dagar
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Zenghui Teng
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Kurt Gottmann
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
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Sun M, Bao W, Huang C, Xia Z, Zhang C, Wang G, Wang R, Li J, Roux S, Li Q, Zou D, Ma K, Bao X. A Novel Probiotic Formula, BIOCG, Protects Against Alzheimer's-Related Cognitive Deficits via Regulation of Dendritic Spine Dynamics. Curr Alzheimer Res 2021; 18:558-572. [PMID: 34674621 DOI: 10.2174/1567205018666211022091110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 06/27/2021] [Accepted: 08/23/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND The brain-gut-microbiome axis has emerged as an important pathway through which perturbations in the gut and/or microbial microenvironment can impact neurological function. Such alterations have been implicated in a variety of neuropsychiatric disorders, includ- ing depression, anxiety, and Alzheimer's Disease (AD) and the use of probiotics as therapy for th- ese diseases remains promising. However, the mechanisms underlying the gut microenvironment's influence on disease pathogenesis and therapy remain unclear. OBJECTIVE The objective of this study is to investigate the effect of a novel probiotic formula, BIOCG, on cognitive function and pathobiological mechanisms, including amyloid processing and dendritic spine dynamics, in a mouse model of AD. METHODS BIOCG was administered for 3 months to 3xTg or 3xTg; Thy1-YFP AD mice and func- tional outcomes were assessed via behavioral testing and electrophysiology. Mechanisms relevant to AD pathogenesis including dendritic spine morphology and turnover, Amyloid Precursor Pro- tein (APP) processing and microglial phenotype were also evaluated. Finally, we sequenced fecal samples following probiotic treatment to assess the impact on gut microbial composition and corre- late the changes with the above described measures. RESULTS Mice treated with BIOCG demonstrated preserved cognitive abilities and stronger Long- Term Potentiation (LTP), spontaneous Excitatory Postsynaptic Currents (sEPSC), and glutamate-in- duced LTPs, indicative of functional and electrophysiological effects. Moreover, we observed atten- uated AD pathogenesis, including reduced Amyloid Beta (Aβ) burden, as well as more mature den- dritic spines in the BIOCG-treated. Our finding of changes in microglial number and phenotype in the treatment group suggests that this formulation may mediate its effects via attenuation of neu- roinflammation. Sequencing data confirmed that the gut microbiome in treated mice was more varied and harbored a greater proportion of "beneficial" bacteria. CONCLUSION Overall, our results indicate that treatment with BIOCG enhances microbial diversity and, through gut-brain axis interactions, attenuates neuroinflammation to produce histologic and functional improvement in AD pathogenesis.
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Affiliation(s)
- Miao Sun
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu. China
| | - Wenchenyang Bao
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu. China
| | - Chengyu Huang
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu. China
| | - Ziyue Xia
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu. China
| | - Changliang Zhang
- Jiangsu Biodep Biotechnology, 6-C2 Dongsheng West Road, Jiangyin 214400, Jiangsu. China
| | - Guangxian Wang
- Jiangsu Biodep Biotechnology, 6-C2 Dongsheng West Road, Jiangyin 214400, Jiangsu. China
| | - Runxin Wang
- Jiangsu Biodep Biotechnology, 6-C2 Dongsheng West Road, Jiangyin 214400, Jiangsu. China
| | - Jiangyu Li
- Admera Health, South Plainfield, NJ07080. United States
| | - Shaun Roux
- Probiotics Australia, 24-30 Blanck Street, Ormeau, QLD, 4208. Australia
| | - Qian Li
- Department of biology, College of Staten Island, Staten Island, NY 10314 . United States
| | - Dongmei Zou
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu. China
| | - Kai Ma
- Jiangsu Biodep Biotechnology, 6-C2 Dongsheng West Road, Jiangyin 214400, Jiangsu. China
| | - Xiaofeng Bao
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu. China
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8
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Busquets O, Parcerisas A, Verdaguer E, Ettcheto M, Camins A, Beas-Zarate C, Castro-Torres RD, Auladell C. c-Jun N-Terminal Kinases in Alzheimer's Disease: A Possible Target for the Modulation of the Earliest Alterations. J Alzheimers Dis 2021; 82:S127-S139. [PMID: 33216036 DOI: 10.3233/jad-201053] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Given the highly multifactorial origin of Alzheimer's disease (AD) neuropathology, disentangling and orderly knowing mechanisms involved in sporadic onset are arduous. Nevertheless, when the elements involved are dissected into smaller pieces, the task becomes more accessible. This review aimed to describe the link between c-Jun N-terminal Kinases (JNKs), master regulators of many cellular functions, and the early alterations of AD: synaptic loss and dysregulation of neuronal transport. Both processes have a role in the posterior cognitive decline observed in AD. The manuscript focuses on the molecular mechanisms of glutamatergic, GABA, and cholinergic synapses altered by the presence of amyloid-β aggregates and hyperphosphorylated tau, as well as on several consequences of the disruption of cellular processes linked to neuronal transport that is controlled by the JNK-JIP (c-jun NH2-terminal kinase (JNK)-interacting proteins (JIPs) complex, including the transport of AβPP or autophagosomes.
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Affiliation(s)
- Oriol Busquets
- Department of Pharmacology, Toxicology and Therapeutic Chemistry; Pharmacy and Food Sciences Faculty, Universitat de Barcelona, Barcelona, Spain.,Department of Biochemistry and Biotechnology, Medicine and Health Sciences Faculty, Universitat Rovira i Virgili, Reus, Spain.,Centre for Biomedical Research of Neurodegenerative Diseases (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain.,Dominick P. Purpura Department of Neurosciences, Albert Einstein College of Medicine, New York City, NY, USA
| | - Antoni Parcerisas
- Centre for Biomedical Research of Neurodegenerative Diseases (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Biology Faculty, Universitat de Barcelona, Barcelona, Spain
| | - Ester Verdaguer
- Centre for Biomedical Research of Neurodegenerative Diseases (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Biology Faculty, Universitat de Barcelona, Barcelona, Spain
| | - Miren Ettcheto
- Department of Pharmacology, Toxicology and Therapeutic Chemistry; Pharmacy and Food Sciences Faculty, Universitat de Barcelona, Barcelona, Spain.,Centre for Biomedical Research of Neurodegenerative Diseases (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
| | - Antoni Camins
- Department of Pharmacology, Toxicology and Therapeutic Chemistry; Pharmacy and Food Sciences Faculty, Universitat de Barcelona, Barcelona, Spain.,Centre for Biomedical Research of Neurodegenerative Diseases (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
| | - Carlos Beas-Zarate
- Department of Cell and Molecular Biology, Laboratory of Neural Regeneration, C.U.C.B.A., Universidad de Guadalajara, Jalisco, Mexico
| | - Rubén Darío Castro-Torres
- Department of Cell and Molecular Biology, Laboratory of Biology of Neurotransmission, C.U.C.B.A., Universidad de Guadalajara, Jalisco, Mexico
| | - Carme Auladell
- Centre for Biomedical Research of Neurodegenerative Diseases (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Biology Faculty, Universitat de Barcelona, Barcelona, Spain
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Cozzolino F, Vezzoli E, Cheroni C, Besusso D, Conforti P, Valenza M, Iacobucci I, Monaco V, Birolini G, Bombaci M, Falqui A, Saftig P, Rossi RL, Monti M, Cattaneo E, Zuccato C. ADAM10 hyperactivation acts on piccolo to deplete synaptic vesicle stores in Huntington's disease. Hum Mol Genet 2021; 30:1175-1187. [PMID: 33601422 DOI: 10.1093/hmg/ddab047] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 01/30/2021] [Accepted: 02/01/2021] [Indexed: 12/13/2022] Open
Abstract
Synaptic dysfunction and cognitive decline in Huntington's disease (HD) involve hyperactive A disintegrin and metalloproteinase domain-containing protein 10 (ADAM10). To identify the molecular mechanisms through which ADAM10 is associated with synaptic dysfunction in HD, we performed an immunoaffinity purification-mass spectrometry (IP-MS) study of endogenous ADAM10 in the brains of wild-type and HD mice. We found that proteins implicated in synapse organization, synaptic plasticity, and vesicle and organelles trafficking interact with ADAM10, suggesting that it may act as hub protein at the excitatory synapse. Importantly, the ADAM10 interactome is enriched in presynaptic proteins and ADAM10 co-immunoprecipitates with piccolo (PCLO), a key player in the recycling and maintenance of synaptic vesicles. In contrast, reduced ADAM10/PCLO immunoprecipitation occurs in the HD brain, with decreased density of synaptic vesicles in the reserve and docked pools at the HD presynaptic terminal. Conditional heterozygous deletion of ADAM10 in the forebrain of HD mice reduces active ADAM10 to wild-type level and normalizes ADAM10/PCLO complex formation and synaptic vesicle density and distribution. The results indicate that presynaptic ADAM10 and PCLO are a relevant component of HD pathogenesis.
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Affiliation(s)
- Flora Cozzolino
- Department of Chemical Sciences, University of Naples "Federico II", Naples 80126, Italy
- CEINGE Advanced Biotechnologies, Naples 80131, Italy
| | - Elena Vezzoli
- Department of Biomedical Sciences for Health, University of Milan, Milan 20133, Italy
| | - Cristina Cheroni
- European Institute of Oncology, IRCCS, Milan 20141, Italy
- Department of Oncology and Hemato-Oncology, University of Milan, Milan 20122, Italy
| | - Dario Besusso
- Department of Biosciences, University of Milan, Milan 20133, Italy
- Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi", Milan 20122, Italy
| | - Paola Conforti
- Department of Biosciences, University of Milan, Milan 20133, Italy
- Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi", Milan 20122, Italy
| | - Marta Valenza
- Department of Biosciences, University of Milan, Milan 20133, Italy
- Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi", Milan 20122, Italy
| | - Ilaria Iacobucci
- Department of Chemical Sciences, University of Naples "Federico II", Naples 80126, Italy
- CEINGE Advanced Biotechnologies, Naples 80131, Italy
| | - Vittoria Monaco
- CEINGE Advanced Biotechnologies, Naples 80131, Italy
- Biostructures and Biosystems National Institute (INBB), Rome 00136, Italy
| | - Giulia Birolini
- Department of Biosciences, University of Milan, Milan 20133, Italy
- Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi", Milan 20122, Italy
| | - Mauro Bombaci
- Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi", Milan 20122, Italy
| | - Andrea Falqui
- Biological and Environmental Science and Engineering (BESE) Division, NABLA Lab, King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia
| | - Paul Saftig
- Institute of Biochemistry, Christian-Albrechts-University of Kiel, Kiel D-24098, Germany
| | - Riccardo L Rossi
- Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi", Milan 20122, Italy
| | - Maria Monti
- Department of Chemical Sciences, University of Naples "Federico II", Naples 80126, Italy
- CEINGE Advanced Biotechnologies, Naples 80131, Italy
| | - Elena Cattaneo
- Department of Biosciences, University of Milan, Milan 20133, Italy
- Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi", Milan 20122, Italy
| | - Chiara Zuccato
- Department of Biosciences, University of Milan, Milan 20133, Italy
- Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi", Milan 20122, Italy
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10
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Choi JY, Cho SJ, Park JH, Yun SM, Jo C, Kim EJ, Huh GY, Park MH, Han C, Koh YH. Elevated Cerebrospinal Fluid and Plasma N-Cadherin in Alzheimer Disease. J Neuropathol Exp Neurol 2020; 79:484-492. [PMID: 32296844 DOI: 10.1093/jnen/nlaa019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 02/11/2020] [Accepted: 02/25/2020] [Indexed: 11/14/2022] Open
Abstract
N-cadherin is a synaptic adhesion molecule stabilizing synaptic cell structure and function. Cleavage of N-cadherin by γ-secretase produces a C-terminal fragment, which is increased in the brains of Alzheimer disease (AD) patients. Here, we investigated the relationship between fluid N-cadherin levels and AD pathology. We first showed that the cleaved levels of N-cadherin were increased in homogenates of postmortem brain from AD patients compared with that in non-AD patients. We found that cleaved N-cadherin levels in the cerebrospinal fluid were increased in AD dementia compared with that in healthy control. ELISA results revealed that plasma levels of N-cadherin in 76 patients with AD were higher than those in 133 healthy control subjects. The N-cadherin levels in the brains of an AD mouse model, APP Swedish/PS1delE9 Tg (APP Tg) were reduced compared with that in control. The N-terminal fragment of N-cadherin produced by cleavage at a plasma membrane was detected extravascularly, accumulated in senile plaques in the cortex of an APP Tg mouse. In addition, N-cadherin plasma levels were increased in APP Tg mice. Collectively, our study suggests that alteration of N-cadherin levels might be associated with AD pathology.
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Affiliation(s)
- Ji-Young Choi
- From the Division of Brain Diseases, Center for Biomedical Sciences, Korea National Institute of Health, Cheongju-si, Chungcheongbuk-do, South Korea
| | - Sun-Jung Cho
- From the Division of Brain Diseases, Center for Biomedical Sciences, Korea National Institute of Health, Cheongju-si, Chungcheongbuk-do, South Korea
| | - Jung Hyun Park
- From the Division of Brain Diseases, Center for Biomedical Sciences, Korea National Institute of Health, Cheongju-si, Chungcheongbuk-do, South Korea
| | - Sang-Moon Yun
- From the Division of Brain Diseases, Center for Biomedical Sciences, Korea National Institute of Health, Cheongju-si, Chungcheongbuk-do, South Korea
| | - Chulman Jo
- From the Division of Brain Diseases, Center for Biomedical Sciences, Korea National Institute of Health, Cheongju-si, Chungcheongbuk-do, South Korea
| | - Eun-Joo Kim
- Department of Neurology, Pusan National University Hospital, Busan, South Korea
| | - Gi Yeong Huh
- Department of Forensic Medicine, Pusan National University School of Medicine, Yangsan, South Korea
| | - Moon Ho Park
- Department of Neurology, Ansan Hospital, Ansan-si, Gyeonggi-do, South Korea
| | - Changsu Han
- Department of Psychiatry, Korea University Medical College, Ansan Hospital, Ansan-si, Gyeonggi-do, South Korea
| | - Young Ho Koh
- From the Division of Brain Diseases, Center for Biomedical Sciences, Korea National Institute of Health, Cheongju-si, Chungcheongbuk-do, South Korea
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Tang M, Alaniz ME, Felsky D, Vardarajan B, Reyes-Dumeyer D, Lantigua R, Medrano M, Bennett DA, de Jager PL, Mayeux R, Santa-Maria I, Reitz C. Synonymous variants associated with Alzheimer disease in multiplex families. Neurol Genet 2020; 6:e450. [PMID: 32637632 PMCID: PMC7323483 DOI: 10.1212/nxg.0000000000000450] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 05/05/2020] [Indexed: 01/15/2023]
Abstract
OBJECTIVE Synonymous variants can lead to disease; nevertheless, the majority of sequencing studies conducted in Alzheimer disease (AD) only assessed coding variation. METHODS To detect synonymous variants modulating AD risk, we conducted a whole-genome sequencing study on 67 Caribbean Hispanic (CH) families multiply affected by AD. Identified disease-associated variants were further assessed in an independent cohort of CHs, expression quantitative trait locus (eQTL) data, brain autopsy data, and functional experiments. RESULTS Rare synonymous variants in 4 genes (CDH23, SLC9A3R1, RHBDD2, and ITIH2) segregated with AD status in multiplex families and had a significantly higher frequency in these families compared with reference populations of similar ancestry. In comparison to subjects without dementia, expression of CDH23 (β = 0.53, p = 0.006) and SLC9A3R1 (β = 0.50, p = 0.02) was increased, and expression of RHBDD2 (β = -0.70, p = 0.02) decreased in individuals with AD at death. In line with this finding, increased expression of CDH23 (β = 0.26 ± 0.08, p = 4.9E-4) and decreased expression of RHBDD2 (β = -0.60 ± 0.12, p = 5.5E-7) were related to brain amyloid load (p = 0.0025). SLC9A3R1 expression was associated with burden of TDP43 pathology (β = 0.58 ± 0.17, p = 5.9E-4). Using eQTL data, the CDH23 variant was in linkage disequilibrium with variants modulating CDH23 expression levels (top single nucleotide polymorphism: rs11000035, p = 4.85E-6, D' = 1.0). Using minigene splicing assays, the CDH23 and SLC9A3R1 variants affected splicing efficiency. CONCLUSIONS These findings suggest that CDH23, SLC9A3R1, RHBDD2, and possibly ITIH2, which are involved in synaptic function, the glutamatergic system, and innate immunity, contribute to AD etiology. In addition, this study supports the notion that synonymous variants contribute to AD risk and that comprehensive scrutinization of this type of genetic variation is warranted and critical.
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Affiliation(s)
- Min Tang
- The Taub Institute for Research on Alzheimer's Disease and the Aging Brain (M.E.A., B.V., R.L., P.L.J., R.M., I.S.-M., C.R.); The Gertrude H. Sergievsky Center (M.T., D.R.-D., R.L., R.M., C.R.); Department of Neurology (P.L.J., R.M., C.R.); Department of Epidemiology (R.M., C.R.); Department of Psychiatry (R.M.), Columbia University, New York; Department of Pathology and Cell Biology (M.E.A., I.S.-M.), Columbia University, New York; Rush Alzheimer's Disease Center (D.A.B.); Department of Neurological Sciences (D.A.B.); Department of Pathology (D.A.B.), Rush University Medical Center, Chicago, IL; Center for Innovation in Brain Science , Departments of Pharmacology and Neurology , University of Arizona College of Medicine (M.T.), Tucson; Department of Medicine (R.L.), College of Physicians and Surgeons, Columbia University, New York, NY; School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic; and The Krembil Centre for Neuroinformatics (D.F.), Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Maria Eugenia Alaniz
- The Taub Institute for Research on Alzheimer's Disease and the Aging Brain (M.E.A., B.V., R.L., P.L.J., R.M., I.S.-M., C.R.); The Gertrude H. Sergievsky Center (M.T., D.R.-D., R.L., R.M., C.R.); Department of Neurology (P.L.J., R.M., C.R.); Department of Epidemiology (R.M., C.R.); Department of Psychiatry (R.M.), Columbia University, New York; Department of Pathology and Cell Biology (M.E.A., I.S.-M.), Columbia University, New York; Rush Alzheimer's Disease Center (D.A.B.); Department of Neurological Sciences (D.A.B.); Department of Pathology (D.A.B.), Rush University Medical Center, Chicago, IL; Center for Innovation in Brain Science , Departments of Pharmacology and Neurology , University of Arizona College of Medicine (M.T.), Tucson; Department of Medicine (R.L.), College of Physicians and Surgeons, Columbia University, New York, NY; School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic; and The Krembil Centre for Neuroinformatics (D.F.), Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Daniel Felsky
- The Taub Institute for Research on Alzheimer's Disease and the Aging Brain (M.E.A., B.V., R.L., P.L.J., R.M., I.S.-M., C.R.); The Gertrude H. Sergievsky Center (M.T., D.R.-D., R.L., R.M., C.R.); Department of Neurology (P.L.J., R.M., C.R.); Department of Epidemiology (R.M., C.R.); Department of Psychiatry (R.M.), Columbia University, New York; Department of Pathology and Cell Biology (M.E.A., I.S.-M.), Columbia University, New York; Rush Alzheimer's Disease Center (D.A.B.); Department of Neurological Sciences (D.A.B.); Department of Pathology (D.A.B.), Rush University Medical Center, Chicago, IL; Center for Innovation in Brain Science , Departments of Pharmacology and Neurology , University of Arizona College of Medicine (M.T.), Tucson; Department of Medicine (R.L.), College of Physicians and Surgeons, Columbia University, New York, NY; School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic; and The Krembil Centre for Neuroinformatics (D.F.), Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Badri Vardarajan
- The Taub Institute for Research on Alzheimer's Disease and the Aging Brain (M.E.A., B.V., R.L., P.L.J., R.M., I.S.-M., C.R.); The Gertrude H. Sergievsky Center (M.T., D.R.-D., R.L., R.M., C.R.); Department of Neurology (P.L.J., R.M., C.R.); Department of Epidemiology (R.M., C.R.); Department of Psychiatry (R.M.), Columbia University, New York; Department of Pathology and Cell Biology (M.E.A., I.S.-M.), Columbia University, New York; Rush Alzheimer's Disease Center (D.A.B.); Department of Neurological Sciences (D.A.B.); Department of Pathology (D.A.B.), Rush University Medical Center, Chicago, IL; Center for Innovation in Brain Science , Departments of Pharmacology and Neurology , University of Arizona College of Medicine (M.T.), Tucson; Department of Medicine (R.L.), College of Physicians and Surgeons, Columbia University, New York, NY; School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic; and The Krembil Centre for Neuroinformatics (D.F.), Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Dolly Reyes-Dumeyer
- The Taub Institute for Research on Alzheimer's Disease and the Aging Brain (M.E.A., B.V., R.L., P.L.J., R.M., I.S.-M., C.R.); The Gertrude H. Sergievsky Center (M.T., D.R.-D., R.L., R.M., C.R.); Department of Neurology (P.L.J., R.M., C.R.); Department of Epidemiology (R.M., C.R.); Department of Psychiatry (R.M.), Columbia University, New York; Department of Pathology and Cell Biology (M.E.A., I.S.-M.), Columbia University, New York; Rush Alzheimer's Disease Center (D.A.B.); Department of Neurological Sciences (D.A.B.); Department of Pathology (D.A.B.), Rush University Medical Center, Chicago, IL; Center for Innovation in Brain Science , Departments of Pharmacology and Neurology , University of Arizona College of Medicine (M.T.), Tucson; Department of Medicine (R.L.), College of Physicians and Surgeons, Columbia University, New York, NY; School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic; and The Krembil Centre for Neuroinformatics (D.F.), Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Rafael Lantigua
- The Taub Institute for Research on Alzheimer's Disease and the Aging Brain (M.E.A., B.V., R.L., P.L.J., R.M., I.S.-M., C.R.); The Gertrude H. Sergievsky Center (M.T., D.R.-D., R.L., R.M., C.R.); Department of Neurology (P.L.J., R.M., C.R.); Department of Epidemiology (R.M., C.R.); Department of Psychiatry (R.M.), Columbia University, New York; Department of Pathology and Cell Biology (M.E.A., I.S.-M.), Columbia University, New York; Rush Alzheimer's Disease Center (D.A.B.); Department of Neurological Sciences (D.A.B.); Department of Pathology (D.A.B.), Rush University Medical Center, Chicago, IL; Center for Innovation in Brain Science , Departments of Pharmacology and Neurology , University of Arizona College of Medicine (M.T.), Tucson; Department of Medicine (R.L.), College of Physicians and Surgeons, Columbia University, New York, NY; School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic; and The Krembil Centre for Neuroinformatics (D.F.), Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Martin Medrano
- The Taub Institute for Research on Alzheimer's Disease and the Aging Brain (M.E.A., B.V., R.L., P.L.J., R.M., I.S.-M., C.R.); The Gertrude H. Sergievsky Center (M.T., D.R.-D., R.L., R.M., C.R.); Department of Neurology (P.L.J., R.M., C.R.); Department of Epidemiology (R.M., C.R.); Department of Psychiatry (R.M.), Columbia University, New York; Department of Pathology and Cell Biology (M.E.A., I.S.-M.), Columbia University, New York; Rush Alzheimer's Disease Center (D.A.B.); Department of Neurological Sciences (D.A.B.); Department of Pathology (D.A.B.), Rush University Medical Center, Chicago, IL; Center for Innovation in Brain Science , Departments of Pharmacology and Neurology , University of Arizona College of Medicine (M.T.), Tucson; Department of Medicine (R.L.), College of Physicians and Surgeons, Columbia University, New York, NY; School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic; and The Krembil Centre for Neuroinformatics (D.F.), Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - David A Bennett
- The Taub Institute for Research on Alzheimer's Disease and the Aging Brain (M.E.A., B.V., R.L., P.L.J., R.M., I.S.-M., C.R.); The Gertrude H. Sergievsky Center (M.T., D.R.-D., R.L., R.M., C.R.); Department of Neurology (P.L.J., R.M., C.R.); Department of Epidemiology (R.M., C.R.); Department of Psychiatry (R.M.), Columbia University, New York; Department of Pathology and Cell Biology (M.E.A., I.S.-M.), Columbia University, New York; Rush Alzheimer's Disease Center (D.A.B.); Department of Neurological Sciences (D.A.B.); Department of Pathology (D.A.B.), Rush University Medical Center, Chicago, IL; Center for Innovation in Brain Science , Departments of Pharmacology and Neurology , University of Arizona College of Medicine (M.T.), Tucson; Department of Medicine (R.L.), College of Physicians and Surgeons, Columbia University, New York, NY; School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic; and The Krembil Centre for Neuroinformatics (D.F.), Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Philip L de Jager
- The Taub Institute for Research on Alzheimer's Disease and the Aging Brain (M.E.A., B.V., R.L., P.L.J., R.M., I.S.-M., C.R.); The Gertrude H. Sergievsky Center (M.T., D.R.-D., R.L., R.M., C.R.); Department of Neurology (P.L.J., R.M., C.R.); Department of Epidemiology (R.M., C.R.); Department of Psychiatry (R.M.), Columbia University, New York; Department of Pathology and Cell Biology (M.E.A., I.S.-M.), Columbia University, New York; Rush Alzheimer's Disease Center (D.A.B.); Department of Neurological Sciences (D.A.B.); Department of Pathology (D.A.B.), Rush University Medical Center, Chicago, IL; Center for Innovation in Brain Science , Departments of Pharmacology and Neurology , University of Arizona College of Medicine (M.T.), Tucson; Department of Medicine (R.L.), College of Physicians and Surgeons, Columbia University, New York, NY; School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic; and The Krembil Centre for Neuroinformatics (D.F.), Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Richard Mayeux
- The Taub Institute for Research on Alzheimer's Disease and the Aging Brain (M.E.A., B.V., R.L., P.L.J., R.M., I.S.-M., C.R.); The Gertrude H. Sergievsky Center (M.T., D.R.-D., R.L., R.M., C.R.); Department of Neurology (P.L.J., R.M., C.R.); Department of Epidemiology (R.M., C.R.); Department of Psychiatry (R.M.), Columbia University, New York; Department of Pathology and Cell Biology (M.E.A., I.S.-M.), Columbia University, New York; Rush Alzheimer's Disease Center (D.A.B.); Department of Neurological Sciences (D.A.B.); Department of Pathology (D.A.B.), Rush University Medical Center, Chicago, IL; Center for Innovation in Brain Science , Departments of Pharmacology and Neurology , University of Arizona College of Medicine (M.T.), Tucson; Department of Medicine (R.L.), College of Physicians and Surgeons, Columbia University, New York, NY; School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic; and The Krembil Centre for Neuroinformatics (D.F.), Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Ismael Santa-Maria
- The Taub Institute for Research on Alzheimer's Disease and the Aging Brain (M.E.A., B.V., R.L., P.L.J., R.M., I.S.-M., C.R.); The Gertrude H. Sergievsky Center (M.T., D.R.-D., R.L., R.M., C.R.); Department of Neurology (P.L.J., R.M., C.R.); Department of Epidemiology (R.M., C.R.); Department of Psychiatry (R.M.), Columbia University, New York; Department of Pathology and Cell Biology (M.E.A., I.S.-M.), Columbia University, New York; Rush Alzheimer's Disease Center (D.A.B.); Department of Neurological Sciences (D.A.B.); Department of Pathology (D.A.B.), Rush University Medical Center, Chicago, IL; Center for Innovation in Brain Science , Departments of Pharmacology and Neurology , University of Arizona College of Medicine (M.T.), Tucson; Department of Medicine (R.L.), College of Physicians and Surgeons, Columbia University, New York, NY; School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic; and The Krembil Centre for Neuroinformatics (D.F.), Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Christiane Reitz
- The Taub Institute for Research on Alzheimer's Disease and the Aging Brain (M.E.A., B.V., R.L., P.L.J., R.M., I.S.-M., C.R.); The Gertrude H. Sergievsky Center (M.T., D.R.-D., R.L., R.M., C.R.); Department of Neurology (P.L.J., R.M., C.R.); Department of Epidemiology (R.M., C.R.); Department of Psychiatry (R.M.), Columbia University, New York; Department of Pathology and Cell Biology (M.E.A., I.S.-M.), Columbia University, New York; Rush Alzheimer's Disease Center (D.A.B.); Department of Neurological Sciences (D.A.B.); Department of Pathology (D.A.B.), Rush University Medical Center, Chicago, IL; Center for Innovation in Brain Science , Departments of Pharmacology and Neurology , University of Arizona College of Medicine (M.T.), Tucson; Department of Medicine (R.L.), College of Physicians and Surgeons, Columbia University, New York, NY; School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic; and The Krembil Centre for Neuroinformatics (D.F.), Centre for Addiction and Mental Health, Toronto, Ontario, Canada
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12
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Ahmad S, Milan MDC, Hansson O, Demirkan A, Agustin R, Sáez ME, Giagtzoglou N, Cabrera-Socorro A, Bakker MHM, Ramirez A, Hankemeier T, Stomrud E, Mattsson-Carlgren N, Scheltens P, van der Flier WM, Ikram MA, Malarstig A, Teunissen CE, Amin N, van Duijn CM. CDH6 and HAGH protein levels in plasma associate with Alzheimer's disease in APOE ε4 carriers. Sci Rep 2020; 10:8233. [PMID: 32427856 PMCID: PMC7237496 DOI: 10.1038/s41598-020-65038-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 04/24/2020] [Indexed: 02/06/2023] Open
Abstract
Many Alzheimer’s disease (AD) genes including Apolipoprotein E (APOE) are found to be expressed in blood-derived macrophages and thus may alter blood protein levels. We measured 91 neuro-proteins in plasma from 316 participants of the Rotterdam Study (incident AD = 161) using Proximity Extension Ligation assay. We studied the association of plasma proteins with AD in the overall sample and stratified by APOE. Findings from the Rotterdam study were replicated in 186 AD patients of the BioFINDER study. We further evaluated the correlation of these protein biomarkers with total tau (t-tau), phosphorylated tau (p-tau) and amyloid-beta (Aβ) 42 levels in cerebrospinal fluid (CSF) in the Amsterdam Dementia Cohort (N = 441). Finally, we conducted a genome-wide association study (GWAS) to identify the genetic variants determining the blood levels of AD-associated proteins. Plasma levels of the proteins, CDH6 (β = 0.638, P = 3.33 × 10−4) and HAGH (β = 0.481, P = 7.20 × 10−4), were significantly elevated in APOE ε4 carrier AD patients. The findings in the Rotterdam Study were replicated in the BioFINDER study for both CDH6 (β = 1.365, P = 3.97 × 10−3) and HAGH proteins (β = 0.506, P = 9.31 × 10−7) when comparing cases and controls in APOE ε4 carriers. In the CSF, CDH6 levels were positively correlated with t-tau and p-tau in the total sample as well as in APOE ε4 stratum (P < 1 × 10−3). The HAGH protein was not detected in CSF. GWAS of plasma CDH6 protein levels showed significant association with a cis-regulatory locus (rs111283466, P = 1.92 × 10−9). CDH6 protein is implicated in cell adhesion and synaptogenesis while HAGH protein is related to the oxidative stress pathway. Our findings suggest that these pathways may be altered during presymptomatic AD and that CDH6 and HAGH may be new blood-based biomarkers.
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Affiliation(s)
- Shahzad Ahmad
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands.
| | - Marta Del Campo Milan
- Neurochemistry laboratory, Department of Clinical Chemistry, Amsterdam Neuroscience, Amsterdam University Medical Centers (AUMC), Vrije Universiteit, Amsterdam, The Netherlands
| | - Oskar Hansson
- Clinical Memory Research Unit, Faculty of Medicine, Lund University, Lund, Sweden.,Memory Clinic, Skåne University Hospital, Malmö, Sweden
| | - Ayse Demirkan
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Ruiz Agustin
- Research Center and Memory clinic Fundació ACE. Institut Català de Neurociències Aplicades, Universitat Internacional de Catalunya, Barcelona, Spain.,CIBERNED, Network Center for Biomedical Research in Neurodegenerative Diseases, National Institute of Health Carlos III, Madrid, Spain
| | - Maria E Sáez
- Centro Andaluz de Estudios Bioinformáticos CAEBi, Sevilla, Spain
| | | | | | - Margot H M Bakker
- Discovery Research, AbbVie Deutschland GmbH & Co. KG, Knollstrasse, 67061, Ludwigshafen, Germany
| | - Alfredo Ramirez
- Department of Neurodegeneration and Geriatric Psychiatry, University of Bonn, 53127, Bonn, Germany.,Division of Neurogenetics and Molecular Psychiatry, Department of Psychiatry and Psychotherapy, University of Cologne, Medical Faculty, 50937, Cologne, Germany.,German Center for Neurodegenerative Diseases (DZNE), 53127, Bonn, Germany
| | - Thomas Hankemeier
- Division of Systems Biomedicine and Pharmacology, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Erik Stomrud
- Clinical Memory Research Unit, Faculty of Medicine, Lund University, Lund, Sweden.,Memory Clinic, Skåne University Hospital, Malmö, Sweden
| | - Niklas Mattsson-Carlgren
- Clinical Memory Research Unit, Faculty of Medicine, Lund University, Lund, Sweden.,Memory Clinic, Skåne University Hospital, Malmö, Sweden
| | - Philip Scheltens
- Alzheimer center Amsterdam, Department of Neurology, Amsterdam Neuroscience, Vrije Universiteit Amsterdam, Amsterdam, UMC, The Netherlands
| | - Wiesje M van der Flier
- Alzheimer center Amsterdam, Department of Neurology, Amsterdam Neuroscience, Vrije Universiteit Amsterdam, Amsterdam, UMC, The Netherlands
| | - M Arfan Ikram
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Anders Malarstig
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.,Pfizer Worldwide R&D, Stockholm, Sweden
| | - Charlotte E Teunissen
- Neurochemistry laboratory, Department of Clinical Chemistry, Amsterdam Neuroscience, Amsterdam University Medical Centers (AUMC), Vrije Universiteit, Amsterdam, The Netherlands
| | - Najaf Amin
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Cornelia M van Duijn
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands. .,Nuffield Department of Population Health, Oxford University, Oxford, UK.
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13
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PC12 Cell Line: Cell Types, Coating of Culture Vessels, Differentiation and Other Culture Conditions. Cells 2020; 9:cells9040958. [PMID: 32295099 PMCID: PMC7227003 DOI: 10.3390/cells9040958] [Citation(s) in RCA: 152] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/09/2020] [Accepted: 04/12/2020] [Indexed: 12/27/2022] Open
Abstract
The PC12 cell line is one of the most commonly used in neuroscience research, including studies on neurotoxicity, neuroprotection, neurosecretion, neuroinflammation, and synaptogenesis. Two types of this line are available in the ATCC collection: traditional PC12 cells grown in suspension and well-attached adherent phenotype. PC12 cells grown in suspension tend to aggregate and adhere poorly to non-coated surfaces. Therefore, it is necessary to modify the surface of culture vessels. This paper aims to characterise the use of two distinct variants of PC12 cells as well as describe their differentiation and neuronal outgrowth with diverse NGF concentrations (rat or human origin) on various surfaces. In our study, we evaluated cell morphology, neurite length, density and outgrowth (measured spectrofluorimetrically), and expression of neuronal biomarkers (doublecortin and NeuN). We found that the collagen coating was the most versatile method of surface modification for both cell lines. For adherent cells, the coating was definitely less important, and the poly-d-lysine surface was as good as collagen. We also demonstrated that the concentration of NGF is of great importance for the degree of differentiation of cells. For suspension cells, we achieved the best neuronal characteristics (length and density of neurites) after 14 days of incubation with 100 ng/mL NGF (change every 48 h), while for adherent cells after 3-5 days, after which they began to proliferate. In the PC12 cell line, doublecortin (DCX) expression in the cytoplasm and NeuN in the cell nucleus were found. In turn, in the PC12 Adh line, DCX was not expressed, and NeuN expression was located in the entire cell (both in the nucleus and cytoplasm). Only the traditional PC12 line grown in suspension after differentiation with NGF should be used for neurobiological studies, especially until the role of the NeuN protein, whose expression has also been noted in the cytoplasm of adherent cells, is well understood.
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14
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Dagar S, Gottmann K. Differential Properties of the Synaptogenic Activities of the Neurexin Ligands Neuroligin1 and LRRTM2. Front Mol Neurosci 2019; 12:269. [PMID: 31780894 PMCID: PMC6856695 DOI: 10.3389/fnmol.2019.00269] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 10/22/2019] [Indexed: 12/03/2022] Open
Abstract
Synaptic cell adhesion molecules are well established to exhibit synaptogenic activity when overexpressed in target cells, indicating that they are involved in formation and functional maturation of synapses. The postsynaptic adhesion proteins Neuroligin1 and LRRTM2 both induce synaptic vesicle clusters in presynaptic axons in vitro by transsynaptically interacting with neurexins. In neurons, this is accompanied by the induction of glutamatergic, but not GABAergic synapses. Although the synaptogenic activity of Neuroligin1 has been well characterized, the properties of the synaptogenic activities of other synaptic adhesion molecules are largely unknown. In this paper, we now compared characteristics of the synaptogenic activities of Neuroligin1 and LRRTM2 upon overexpression in cultured mouse cortical neurons. Individual cortical neurons were transfected with Neuroligin1 and LRRTM2 expression plasmids, respectively, and synaptic vesicle clustering in contacting axons was examined by immunostaining for the vesicle membrane protein VAMP2. In immature neurons at 6–7 days in vitro (DIV) both Neuroligin1 and LRRTM2 exhibited strong synaptogenic activity. However, upon further neuronal differentiation only LRRTM2 retained significant synaptogenic activity at 12–13 DIV. A similar differential developmental maturation of the synaptogenic activities of Neuroligin1 and LRRTM2 was observed for the induction of glutamatergic synapses, which were detected by co-immunostaining for VGLUT1 and Homer1. Most interestingly, the synaptogenic activity of Neuroligin1 was strongly dependent on the expression and function of the synaptic adhesion molecule N-cadherin in immature neurons. In contrast, the synaptogenic activity of LRRTM2 was independent of N-cadherin expression and function in both immature (6–7 DIV) and more mature neurons (14–15 DIV). Taken together, our results with overexpression in cultured cortical neurons revealed striking differences in the properties of the synaptogenic activities of Neuroligin1 and LRRTM2, although both transsynaptically interact with presynaptic neurexins.
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Affiliation(s)
- Sushma Dagar
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Kurt Gottmann
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
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15
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Klapper SD, Garg P, Dagar S, Lenk K, Gottmann K, Nieweg K. Astrocyte lineage cells are essential for functional neuronal differentiation and synapse maturation in human iPSC-derived neural networks. Glia 2019; 67:1893-1909. [PMID: 31246351 DOI: 10.1002/glia.23666] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 06/08/2019] [Accepted: 06/11/2019] [Indexed: 01/01/2023]
Abstract
Human astrocytes differ dramatically in cell morphology and gene expression from murine astrocytes. The latter are well known to be of major importance in the formation of neuronal networks by promoting synapse maturation. However, whether human astrocyte lineage cells have a similar role in network formation has not been firmly established. Here, we investigated the impact of human astrocyte lineage cells on the functional maturation of neural networks that were derived from human induced pluripotent stem cells (hiPSCs). Initial in vitro differentiation of hiPSC-derived neural progenitor cells and immature neurons (glia+ cultures) resulted in spontaneously active neural networks as indicated by synchronous neuronal Ca2+ transients. Depleting proliferating neural progenitors from these cultures by short-term antimitotic treatment resulted in strongly astrocyte lineage cell-depleted neuronal networks (glia- cultures). Strikingly, in contrast to glia+ cultures, glia- cultures did not exhibit spontaneous network activity. Detailed analysis of the morphological and electrophysiological properties of neurons by patch clamp recordings revealed reduced dendritic arborization in glia- cultures. In addition, a reduced action potential frequency upon current injection in pyramidal-like neurons was observed, whereas the electrical excitability of multipolar neurons was unaltered. Furthermore, we found a reduced dendritic density of PSD95-positive excitatory synapses, and more immature properties of AMPA (alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid) miniature excitatory postsynaptic currents (mEPSCs) in glia- cultures, suggesting that the maturation of glutamatergic synapses depends on the presence of hiPSC-derived astrocyte lineage cells. Intriguingly, addition of the astrocyte-derived synapse maturation inducer cholesterol increased the dendritic density of PSD95-positive excitatory synapses in glia- cultures.
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Affiliation(s)
- Simon D Klapper
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Pretty Garg
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany.,Institute of Pharmacology and Clinical Pharmacy, Phillips-University Marburg, Marburg, Germany
| | - Sushma Dagar
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Kerstin Lenk
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Kurt Gottmann
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Katja Nieweg
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany.,Institute of Pharmacology and Clinical Pharmacy, Phillips-University Marburg, Marburg, Germany
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16
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Vezzoli E, Caron I, Talpo F, Besusso D, Conforti P, Battaglia E, Sogne E, Falqui A, Petricca L, Verani M, Martufi P, Caricasole A, Bresciani A, Cecchetti O, Rivetti di Val Cervo P, Sancini G, Riess O, Nguyen H, Seipold L, Saftig P, Biella G, Cattaneo E, Zuccato C. Inhibiting pathologically active ADAM10 rescues synaptic and cognitive decline in Huntington's disease. J Clin Invest 2019; 129:2390-2403. [PMID: 31063986 DOI: 10.1172/jci120616] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 03/14/2019] [Indexed: 01/10/2023] Open
Abstract
A disintegrine and metalloproteinase 10 (ADAM10) is implicated in synaptic function through its interaction with postsynaptic receptors and adhesion molecules. Here, we report that levels of active ADAM10 are increased in Huntington's disease (HD) mouse cortices and striata and in human postmortem caudate. We show that, in the presence of polyglutamine-expanded (polyQ-expanded) huntingtin (HTT), ADAM10 accumulates at the postsynaptic densities (PSDs) and causes excessive cleavage of the synaptic protein N-cadherin (N-CAD). This aberrant phenotype is also detected in neurons from HD patients where it can be reverted by selective silencing of mutant HTT. Consistently, ex vivo delivery of an ADAM10 synthetic inhibitor reduces N-CAD proteolysis and corrects electrophysiological alterations in striatal medium-sized spiny neurons (MSNs) of 2 HD mouse models. Moreover, we show that heterozygous conditional deletion of ADAM10 or delivery of a competitive TAT-Pro-ADAM10709-729 peptide in R6/2 mice prevents N-CAD proteolysis and ameliorates cognitive deficits in the mice. Reduction in synapse loss was also found in R6/2 mice conditionally deleted for ADAM10. Taken together, these results point to a detrimental role of hyperactive ADAM10 at the HD synapse and provide preclinical evidence of the therapeutic potential of ADAM10 inhibition in HD.
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Affiliation(s)
- Elena Vezzoli
- Department of Biosciences, University of Milan, Milan, Italy.,Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi," Milan, Italy
| | - Ilaria Caron
- Department of Biosciences, University of Milan, Milan, Italy.,Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi," Milan, Italy
| | - Francesca Talpo
- Department of Biology and Biotechnologies, University of Pavia, Pavia, Italy
| | - Dario Besusso
- Department of Biosciences, University of Milan, Milan, Italy.,Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi," Milan, Italy
| | - Paola Conforti
- Department of Biosciences, University of Milan, Milan, Italy.,Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi," Milan, Italy
| | - Elisa Battaglia
- Department of Biosciences, University of Milan, Milan, Italy.,Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi," Milan, Italy
| | - Elisa Sogne
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Science & Engineering (BESE) Division, NABLA Lab, Thuwal, Saudi Arabia
| | - Andrea Falqui
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Science & Engineering (BESE) Division, NABLA Lab, Thuwal, Saudi Arabia
| | | | | | | | | | | | | | - Pia Rivetti di Val Cervo
- Department of Biosciences, University of Milan, Milan, Italy.,Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi," Milan, Italy
| | - Giulio Sancini
- School of Medicine and Surgery, Nanomedicine Center, Neuroscience Center, University of Milano-Bicocca, Monza, Italy
| | - Olaf Riess
- Institute of Medical Genetics and Applied Genomics, University of Tuebingen, Tuebingen, Germany
| | - Hoa Nguyen
- Institute of Medical Genetics and Applied Genomics, University of Tuebingen, Tuebingen, Germany
| | - Lisa Seipold
- Institute of Biochemistry, Christian Albrechts University of Kiel, Kiel, Germany
| | - Paul Saftig
- Institute of Biochemistry, Christian Albrechts University of Kiel, Kiel, Germany
| | - Gerardo Biella
- Department of Biology and Biotechnologies, University of Pavia, Pavia, Italy
| | - Elena Cattaneo
- Department of Biosciences, University of Milan, Milan, Italy.,Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi," Milan, Italy
| | - Chiara Zuccato
- Department of Biosciences, University of Milan, Milan, Italy.,Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi," Milan, Italy
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17
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Kilinc D. The Emerging Role of Mechanics in Synapse Formation and Plasticity. Front Cell Neurosci 2018; 12:483. [PMID: 30574071 PMCID: PMC6291423 DOI: 10.3389/fncel.2018.00483] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 11/27/2018] [Indexed: 12/26/2022] Open
Abstract
The regulation of synaptic strength forms the basis of learning and memory, and is a key factor in understanding neuropathological processes that lead to cognitive decline and dementia. While the mechanical aspects of neuronal development, particularly during axon growth and guidance, have been extensively studied, relatively little is known about the mechanical aspects of synapse formation and plasticity. It is established that a filamentous actin network with complex spatiotemporal behavior controls the dendritic spine shape and size, which is thought to be crucial for activity-dependent synapse plasticity. Accordingly, a number of actin binding proteins have been identified as regulators of synapse plasticity. On the other hand, a number of cell adhesion molecules (CAMs) are found in synapses, some of which form transsynaptic bonds to align the presynaptic active zone (PAZ) with the postsynaptic density (PSD). Considering that these CAMs are key components of cellular mechanotransduction, two critical questions emerge: (i) are synapses mechanically regulated? and (ii) does disrupting the transsynaptic force balance lead to (or exacerbate) synaptic failure? In this mini review article, I will highlight the mechanical aspects of synaptic structures-focusing mainly on cytoskeletal dynamics and CAMs-and discuss potential mechanoregulation of synapses and its relevance to neurodegenerative diseases.
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Affiliation(s)
- Devrim Kilinc
- INSERM U1167, Institut Pasteur de Lille, Lille, France
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18
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Dursun E, Gezen-Ak D. Vitamin D receptor is present on the neuronal plasma membrane and is co-localized with amyloid precursor protein, ADAM10 or Nicastrin. PLoS One 2017; 12:e0188605. [PMID: 29176823 PMCID: PMC5703467 DOI: 10.1371/journal.pone.0188605] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 11/09/2017] [Indexed: 12/14/2022] Open
Abstract
Our recent study indicated that vitamin D and its receptors are important parts of the amyloid processing pathway in neurons. Yet the role of vitamin D receptor (VDR) in amyloid pathogenesis is complex and all regulations over the production of amyloid beta cannot be explained solely with the transcriptional regulatory properties of VDR. Given that we hypothesized that VDR might exist on the neuronal plasma membrane in close proximity with amyloid precursor protein (APP) and secretase complexes. The present study primarily focused on the localization of VDR in neurons and its interaction with amyloid pathology-related proteins. The localization of VDR on neuronal membranes and its co-localization with target proteins were investigated with cell surface staining followed by immunofluorescence labelling. The FpClass was used for protein-protein interaction prediction. Our results demonstrated the localization of VDR on the neuronal plasma membrane and the co-localization of VDR and APP or ADAM10 or Nicastrin and limited co-localization of VDR and PS1. E-cadherin interaction with APP or the γ-secretase complex may involve NOTCH1, NUMB, or FHL2, according to FpClass. This suggested complex might also include VDR, which greatly contributes to Ca+2 hemostasis with its ligand vitamin D. Consequently, we suggested that VDR might be a member of this complex also with its own non-genomic action and that it can regulate the APP processing pathway in this way in neurons.
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Affiliation(s)
- Erdinç Dursun
- Brain and Neurodegenerative Disorders Research Laboratory, Department of Medical Biology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Duygu Gezen-Ak
- Brain and Neurodegenerative Disorders Research Laboratory, Department of Medical Biology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
- * E-mail:
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19
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Málaga-Trillo E, Ochs K. Uncontrolled SFK-mediated protein trafficking in prion and Alzheimer's disease. Prion 2017; 10:352-361. [PMID: 27649856 DOI: 10.1080/19336896.2016.1221873] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
Prions and Amyloid beta (Aβ) peptides induce synaptic damage via complex mechanisms that include the pathological alteration of intracellular signaling cascades. The host-encoded cellular prion protein (PrPC) acts as a high-affinity cell surface receptor for both toxic species and it can modulate the endocytic trafficking of the N-methyl D-aspartate (NMDA) receptor and E-cadherin adhesive complexes via Src family kinases (SFKs). Interestingly, SFK-mediated control of endocytosis is a widespread mechanism used to regulate the activity of important transmembrane proteins, including neuroreceptors for major excitatory and inhibitory neurotransmitters. Here we discuss our recent work in zebrafish and accumulating evidence suggesting that subversion of this pleiotropic regulatory mechanism by Aβ oligomers and prions explains diverse neurotransmission deficits observed in human patients and mouse models of prion and Alzheimer's neurodegeneration. While Aβ, PrPC and SFKs constitute potential therapeutic targets on their own, drug discovery efforts might benefit significantly from aiming at protein-protein interactions that modulate the endocytosis of specific SFK targets.
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Affiliation(s)
| | - Katharina Ochs
- a Department of Biology , Universidad Peruana Cayetano Heredia , Lima , Perú.,b Department of Biology , University of Konstanz , Konstanz , Germany
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20
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Gonçalves NP, Martins D, Saraiva MJ. Overexpression of Protocadherin-10 in Transthyretin-Related Familial Amyloidotic Polyneuropathy. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 186:1913-24. [PMID: 27338109 DOI: 10.1016/j.ajpath.2016.02.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 01/27/2016] [Accepted: 02/23/2016] [Indexed: 10/21/2022]
Abstract
Overwhelming data suggest that oncogenic and neurodegenerative pathways share several altered cellular responses to insults such as oxidative stress, extracellular matrix remodeling, inflammation, or cell dyscommunication. Protocadherin-10 (Pcdh10) is an adhesion molecule found to protect against tumorigenesis and essential for axonal elongation and actin dynamics during development. Here, by using genome microarrays we identified for the first time Pcdh10 up-regulation in tissues from transgenic mouse models, cultured Schwann cells, and human samples from a familial form of peripheral neuropathy (familial amyloidotic polyneuropathy). Familial amyloidotic polyneuropathy is characterized by poor functional recovery and impaired nerve regenerative response after misfolding and deposition in the peripheral nervous system of mutant transthyretin. Not only increased transcriptional and translational Pcdh10 levels occurred in axons and Schwann cells of nerves with deposited transthyretin aggregates but the pattern also extended to associated cues of axon guidance like neuropilin-1 and F-actin. These findings suggest that Pcdh10 may influence subcellular actin cytoskeletal organization and axon-axon interactions in the course of familial amyloidotic polyneuropathy. Moreover, when preventing nonfibrillar transthyretin deposition with anakinra or transthyretin siRNA, Pcdh10 protein levels were reduced, highlighting its potential as a novel disease biomarker. Whether Pcdh10 overexpression in familial amyloidotic polyneuropathy represents a protective or deleterious response, enhancing survival or promoting cell death will need further investigation.
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Affiliation(s)
- Nádia P Gonçalves
- Instituto de Inovação e Investigação em Saúde (I3S), Universidade do Porto, Porto, Portugal; Molecular Neurobiology Group, IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - Diana Martins
- Instituto de Inovação e Investigação em Saúde (I3S), Universidade do Porto, Porto, Portugal; Molecular Neurobiology Group, IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - Maria João Saraiva
- Instituto de Inovação e Investigação em Saúde (I3S), Universidade do Porto, Porto, Portugal; Molecular Neurobiology Group, IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal.
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21
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van Stegen B, Dagar S, Gottmann K. Release activity-dependent control of vesicle endocytosis by the synaptic adhesion molecule N-cadherin. Sci Rep 2017; 7:40865. [PMID: 28106089 PMCID: PMC5247765 DOI: 10.1038/srep40865] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 12/13/2016] [Indexed: 11/25/2022] Open
Abstract
At synapses in the mammalian brain, continuous information transfer requires the long-term maintenance of homeostatic coupling between exo- and endocytosis of synaptic vesicles. Because classical endocytosis is orders of magnitude slower than the millisecond-range exocytosis of vesicles, high frequency vesicle fusion could potentially compromise structural stability of synapses. However, the molecular mechanisms mediating the tight coupling of exo- and endocytosis are largely unknown. Here, we investigated the role of the transsynaptic adhesion molecules N-cadherin and Neuroligin1 in regulating vesicle exo- and endocytosis by using activity-induced FM4–64 staining and by using synaptophysin-pHluorin fluorescence imaging. The synaptic adhesion molecules N-cadherin and Neuroligin1 had distinct impacts on exo- and endocytosis at mature cortical synapses. Expression of Neuroligin1 enhanced vesicle release in a N-cadherin-dependent way. Most intriguingly, expression of N-cadherin enhanced both vesicle exo- and endocytosis. Further detailed analysis of N-cadherin knockout neurons revealed that the boosting of endocytosis by N-cadherin was largely dependent on preceding high levels of vesicle release activity. In summary, regulation of vesicle endocytosis was mediated at the molecular level by N-cadherin in a release activity-dependent manner. Because of its endocytosis enhancing function, N-cadherin might play an important role in the coupling of vesicle exo- and endocytosis.
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Affiliation(s)
- Bernd van Stegen
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Sushma Dagar
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Kurt Gottmann
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
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22
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Synaptic Cell Adhesion Molecules in Alzheimer's Disease. Neural Plast 2016; 2016:6427537. [PMID: 27242933 PMCID: PMC4868906 DOI: 10.1155/2016/6427537] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Accepted: 04/13/2016] [Indexed: 12/14/2022] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative brain disorder associated with the loss of synapses between neurons in the brain. Synaptic cell adhesion molecules are cell surface glycoproteins which are expressed at the synaptic plasma membranes of neurons. These proteins play key roles in formation and maintenance of synapses and regulation of synaptic plasticity. Genetic studies and biochemical analysis of the human brain tissue, cerebrospinal fluid, and sera from AD patients indicate that levels and function of synaptic cell adhesion molecules are affected in AD. Synaptic cell adhesion molecules interact with Aβ, a peptide accumulating in AD brains, which affects their expression and synaptic localization. Synaptic cell adhesion molecules also regulate the production of Aβ via interaction with the key enzymes involved in Aβ formation. Aβ-dependent changes in synaptic adhesion affect the function and integrity of synapses suggesting that alterations in synaptic adhesion play key roles in the disruption of neuronal networks in AD.
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23
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Emerging Link between Alzheimer's Disease and Homeostatic Synaptic Plasticity. Neural Plast 2016; 2016:7969272. [PMID: 27019755 PMCID: PMC4785275 DOI: 10.1155/2016/7969272] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 01/31/2016] [Indexed: 01/14/2023] Open
Abstract
Alzheimer's disease (AD) is an irreversible brain disorder characterized by progressive cognitive decline and neurodegeneration of brain regions that are crucial for learning and memory. Although intracellular neurofibrillary tangles and extracellular senile plaques, composed of insoluble amyloid-β (Aβ) peptides, have been the hallmarks of postmortem AD brains, memory impairment in early AD correlates better with pathological accumulation of soluble Aβ oligomers and persistent weakening of excitatory synaptic strength, which is demonstrated by inhibition of long-term potentiation, enhancement of long-term depression, and loss of synapses. However, current, approved interventions aiming to reduce Aβ levels have failed to retard disease progression; this has led to a pressing need to identify and target alternative pathogenic mechanisms of AD. Recently, it has been suggested that the disruption of Hebbian synaptic plasticity in AD is due to aberrant metaplasticity, which is a form of homeostatic plasticity that tunes the magnitude and direction of future synaptic plasticity based on previous neuronal or synaptic activity. This review examines emerging evidence for aberrant metaplasticity in AD. Putative mechanisms underlying aberrant metaplasticity in AD will also be discussed. We hope this review inspires future studies to test the extent to which these mechanisms contribute to the etiology of AD and offer therapeutic targets.
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Sempou E, Biasini E, Pinzón-Olejua A, Harris DA, Málaga-Trillo E. Activation of zebrafish Src family kinases by the prion protein is an amyloid-β-sensitive signal that prevents the endocytosis and degradation of E-cadherin/β-catenin complexes in vivo. Mol Neurodegener 2016; 11:18. [PMID: 26860872 PMCID: PMC4748561 DOI: 10.1186/s13024-016-0076-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 01/18/2016] [Indexed: 11/25/2022] Open
Abstract
Background Prions and amyloid-β (Aβ) oligomers trigger neurodegeneration by hijacking a poorly understood cellular signal mediated by the prion protein (PrP) at the plasma membrane. In early zebrafish embryos, PrP-1-dependent signals control cell-cell adhesion via a tyrosine phosphorylation-dependent mechanism. Results Here we report that the Src family kinases (SFKs) Fyn and Yes act downstream of PrP-1 to prevent the endocytosis and degradation of E-cadherin/β-catenin adhesion complexes in vivo. Accordingly, knockdown of PrP-1 or Fyn/Yes cause similar zebrafish gastrulation phenotypes, whereas Fyn/Yes expression rescues the PrP-1 knockdown phenotype. We also show that zebrafish and mouse PrPs positively regulate the activity of Src kinases and that these have an unexpected positive effect on E-cadherin-mediated cell adhesion. Interestingly, while PrP knockdown impairs β-catenin adhesive function, PrP overexpression enhances it, thereby antagonizing its nuclear, wnt-related signaling activity and disturbing embryonic dorsoventral specification. The ability of mouse PrP to influence these events in zebrafish embryos requires its neuroprotective, polybasic N-terminus but not its neurotoxicity-associated central region. Remarkably, human Aβ oligomers up-regulate the PrP-1/SFK/E-cadherin/β-catenin pathway in zebrafish embryonic cells, mimicking a PrP gain-of-function scenario. Conclusions Our gain- and loss-of-function experiments in zebrafish suggest that PrP and SFKs enhance the cell surface stability of embryonic adherens junctions via the same complex mechanism through which they over-activate neuroreceptors that trigger synaptic damage. The profound impact of this pathway on early zebrafish development makes these embryos an ideal model to study the cellular and molecular events affected by neurotoxic PrP mutations and ligands in vivo. In particular, our finding that human Aβ oligomers activate the zebrafish PrP/SFK/E-cadherin pathway opens the possibility of using fish embryos to rapidly screen for novel therapeutic targets and compounds against prion- and Alzheimer's-related neurodegeneration. Altogether, our data illustrate PrP-dependent signals relevant to embryonic development, neuronal physiology and neurological disease. Electronic supplementary material The online version of this article (doi:10.1186/s13024-016-0076-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Emily Sempou
- Department of Biology, University of Konstanz, Constance, 78457, Germany. .,Present address: Department of Pediatrics, Yale University School of Medicine, New Haven, CT, 06520, USA.
| | - Emiliano Biasini
- Department of Biochemistry, Boston University School of Medicine, Boston, MA, 02118, USA. .,Present address: Dulbecco Telethon Institute, Laboratory of Prions and Amyloids, Centre for Integrative Biology (CIBIO), University of Trento, 38123, Trento, Italy.
| | - Alejandro Pinzón-Olejua
- Department of Biology, University of Konstanz, Constance, 78457, Germany. .,Present address: Max PIanck Institute for Brain Research, Department of Synaptic Plasticity, 60438, Frankfurt/Main, Germany.
| | - David A Harris
- Department of Biochemistry, Boston University School of Medicine, Boston, MA, 02118, USA.
| | - Edward Málaga-Trillo
- Department of Biology, University of Konstanz, Constance, 78457, Germany. .,Department of Biology, Universidad Peruana Cayetano Heredia, Lima 31, Perú.
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25
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Abstract
Neurons are highly polarized specialized cells. Neuronal integrity and functional roles are critically dependent on dendritic architecture and synaptic structure, function and plasticity. The cadherins are glycosylated transmembrane proteins that form cell adhesion complexes in various tissues. They are associated with a group of cytosolic proteins, the catenins. While the functional roles of the complex have been extensively investigates in non-neuronal cells, it is becoming increasingly clear that components of the complex have critical roles in regulating dendritic and synaptic architecture, function and plasticity in neurons. Consistent with these functional roles, aberrations in components of the complex have been implicated in a variety of neurodevelopmental disorders. In this review, we discuss the roles of the classical cadherins and catenins in various aspects of dendrite and synapse architecture and function and their relevance to human neurological disorders. Cadherins are glycosylated transmembrane proteins that were initially identified as Ca(2+)-dependent cell adhesion molecules. They are present on plasma membrane of a variety of cell types from primitive metazoans to humans. In the past several years, it has become clear that in addition to providing mechanical adhesion between cells, cadherins play integral roles in tissue morphogenesis and homeostasis. The cadherin family is composed of more than 100 members and classified into several subfamilies, including classical cadherins and protocadherins. Several of these cadherin family members have been implicated in various aspects of neuronal development and function. (1-3) The classical cadherins are associated with a group of cytosolic proteins, collectively called the catenins. While the functional roles of the cadherin-catenin cell adhesion complex have been extensively investigated in epithelial cells, it is now clear that components of the complex are well expressed in central neurons at different stages during development. (4,5) Recent exciting studies have shed some light on the functional roles of cadherins and catenins in central neurons. In this review, we will provide a brief overview of the cadherin superfamily, describe cadherin family members expressed in central neurons, cadherin-catenin complexes in central neurons and then focus on role of the cadherin-catenin complex in dendrite morphogenesis and synapse morphogenesis, function and plasticity. The final section is dedicated to discussion of the emerging list of neural disorders linked to cadherins and catenins. While the roles of cadherins and catenins have been examined in several different types of neurons, the focus of this review is their role in mammalian central neurons, particularly those of the cortex and hippocampus. Accompanying this review is a series of excellent reviews targeting the roles of cadherins and protocadherins in other aspects of neural development.
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Affiliation(s)
- Eunju Seong
- a Developmental Neuroscience; Munroe-Meyer Institute; University of Nebraska Medical Center ; Omaha , NE USA
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26
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Baranger K, Marchalant Y, Bonnet AE, Crouzin N, Carrete A, Paumier JM, Py NA, Bernard A, Bauer C, Charrat E, Moschke K, Seiki M, Vignes M, Lichtenthaler SF, Checler F, Khrestchatisky M, Rivera S. MT5-MMP is a new pro-amyloidogenic proteinase that promotes amyloid pathology and cognitive decline in a transgenic mouse model of Alzheimer's disease. Cell Mol Life Sci 2016; 73:217-36. [PMID: 26202697 PMCID: PMC4700096 DOI: 10.1007/s00018-015-1992-1] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 07/08/2015] [Accepted: 07/10/2015] [Indexed: 01/22/2023]
Abstract
Membrane-type 5-matrix metalloproteinase (MT5-MMP) is a proteinase mainly expressed in the nervous system with emerging roles in brain pathophysiology. The implication of MT5-MMP in Alzheimer's disease (AD), notably its interplay with the amyloidogenic process, remains elusive. Accordingly, we crossed the genetically engineered 5xFAD mouse model of AD with MT5-MMP-deficient mice and examined the impact of MT5-MMP deficiency in bigenic 5xFAD/MT5-MMP(-/-) mice. At early stages (4 months) of the pathology, the levels of amyloid beta peptide (Aβ) and its amyloid precursor protein (APP) C-terminal fragment C99 were largely reduced in the cortex and hippocampus of 5xFAD/MT5-MMP(-/-), compared to 5xFAD mice. Reduced amyloidosis in bigenic mice was concomitant with decreased glial reactivity and interleukin-1β (IL-1β) levels, and the preservation of long-term potentiation (LTP) and spatial learning, without changes in the activity of α-, β- and γ-secretases. The positive impact of MT5-MMP deficiency was still noticeable at 16 months of age, as illustrated by reduced amyloid burden and gliosis, and a better preservation of the cortical neuronal network and synaptophysin levels in bigenic mice. MT5-MMP expressed in HEKswe cells colocalized and co-immunoprecipitated with APP and significantly increased the levels of Aβ and C99. MT5-MMP also promoted the release of a soluble APP fragment of 95 kDa (sAPP95) in HEKswe cells. sAPP95 levels were significantly reduced in brain homogenates of 5xFAD/MT5-MMP(-/-) mice, supporting altogether the idea that MT5-MMP influences APP processing. MT5-MMP emerges as a new pro-amyloidogenic regulator of APP metabolism, whose deficiency alleviates amyloid pathology, neuroinflammation and cognitive decline.
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Affiliation(s)
- Kévin Baranger
- Aix-Marseille Université, CNRS, NICN UMR 7259, 13344, Marseille, France
| | - Yannick Marchalant
- Aix-Marseille Université, CNRS, NICN UMR 7259, 13344, Marseille, France
- Psychology Department, Central Michigan University, Mount Pleasant, MI, 48859, USA
| | - Amandine E Bonnet
- Aix-Marseille Université, CNRS, NICN UMR 7259, 13344, Marseille, France
| | - Nadine Crouzin
- Aix-Marseille Université, CNRS, NICN UMR 7259, 13344, Marseille, France
| | - Alex Carrete
- Aix-Marseille Université, CNRS, NICN UMR 7259, 13344, Marseille, France
| | | | - Nathalie A Py
- Aix-Marseille Université, CNRS, NICN UMR 7259, 13344, Marseille, France
| | - Anne Bernard
- Aix-Marseille Université, CNRS, NICN UMR 7259, 13344, Marseille, France
| | - Charlotte Bauer
- Labex DistAlz, IPMC UMR 7275 CNRS-UNS, 06560, Valbonne, France
| | - Eliane Charrat
- Aix-Marseille Université, CNRS, NICN UMR 7259, 13344, Marseille, France
| | - Katrin Moschke
- German Center for Neurodegenerative Diseases (DZNE) and Neuroproteomics, Munich, Germany
- Klinikum rechts der Isar, and Institute for Advanced Study, Technische Universität München (TUM), 81675, Munich, Germany
| | - Mothoharu Seiki
- Division of Cancer Cell Research, Institute of Medical Science, University of Tokyo, Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan
| | - Michel Vignes
- UMR5247 IBMM CNRS University of Montpellier 1 and University of Montpellier 2, 34095, Montepellier, France
| | - Stefan F Lichtenthaler
- German Center for Neurodegenerative Diseases (DZNE) and Neuroproteomics, Munich, Germany
- Klinikum rechts der Isar, and Institute for Advanced Study, Technische Universität München (TUM), 81675, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), 80336, Munich, Germany
| | | | | | - Santiago Rivera
- Aix-Marseille Université, CNRS, NICN UMR 7259, 13344, Marseille, France.
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Cadherin-13, a risk gene for ADHD and comorbid disorders, impacts GABAergic function in hippocampus and cognition. Transl Psychiatry 2015; 5:e655. [PMID: 26460479 PMCID: PMC4930129 DOI: 10.1038/tp.2015.152] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 07/11/2015] [Indexed: 12/14/2022] Open
Abstract
Cadherin-13 (CDH13), a unique glycosylphosphatidylinositol-anchored member of the cadherin family of cell adhesion molecules, has been identified as a risk gene for attention-deficit/hyperactivity disorder (ADHD) and various comorbid neurodevelopmental and psychiatric conditions, including depression, substance abuse, autism spectrum disorder and violent behavior, while the mechanism whereby CDH13 dysfunction influences pathogenesis of neuropsychiatric disorders remains elusive. Here we explored the potential role of CDH13 in the inhibitory modulation of brain activity by investigating synaptic function of GABAergic interneurons. Cellular and subcellular distribution of CDH13 was analyzed in the murine hippocampus and a mouse model with a targeted inactivation of Cdh13 was generated to evaluate how CDH13 modulates synaptic activity of hippocampal interneurons and behavioral domains related to psychopathologic (endo)phenotypes. We show that CDH13 expression in the cornu ammonis (CA) region of the hippocampus is confined to distinct classes of interneurons. Specifically, CDH13 is expressed by numerous parvalbumin and somatostatin-expressing interneurons located in the stratum oriens, where it localizes to both the soma and the presynaptic compartment. Cdh13(-/-) mice show an increase in basal inhibitory, but not excitatory, synaptic transmission in CA1 pyramidal neurons. Associated with these alterations in hippocampal function, Cdh13(-/-) mice display deficits in learning and memory. Taken together, our results indicate that CDH13 is a negative regulator of inhibitory synapses in the hippocampus, and provide insights into how CDH13 dysfunction may contribute to the excitatory/inhibitory imbalance observed in neurodevelopmental disorders, such as ADHD and autism.
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Nieweg K, Andreyeva A, van Stegen B, Tanriöver G, Gottmann K. Alzheimer's disease-related amyloid-β induces synaptotoxicity in human iPS cell-derived neurons. Cell Death Dis 2015; 6:e1709. [PMID: 25837485 PMCID: PMC4650541 DOI: 10.1038/cddis.2015.72] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Revised: 02/13/2015] [Accepted: 02/17/2015] [Indexed: 12/22/2022]
Abstract
Human induced pluripotent stem cell (iPSC)-derived neurons have been proposed to be a highly valuable cellular model for studying the pathomechanisms of Alzheimer's disease (AD). Studies employing patient-specific human iPSCs as models of familial and sporadic forms of AD described elevated levels of AD-related amyloid-β (Aβ). However, none of the present AD iPSC studies could recapitulate the synaptotoxic actions of Aβ, which are crucial early events in a cascade that eventually leads to vast brain degeneration. Here we established highly reproducible, human iPSC-derived cortical cultures as a cellular model to study the synaptotoxic effects of Aβ. We developed a highly efficient immunopurification procedure yielding immature neurons that express markers of deep layer cortical pyramidal neurons and GABAergic interneurons. Upon long-term cultivation, purified cells differentiated into mature neurons exhibiting the generation of action potentials and excitatory glutamatergic and inhibitory GABAergic synapses. Most interestingly, these iPSC-derived human neurons were strongly susceptible to the synaptotoxic actions of Aβ. Application of Aβ for 8 days led to a reduction in the overall FM4–64 and vGlut1 staining of vesicles in neurites, indicating a loss of vesicle clusters. A selective analysis of presynaptic vesicle clusters on dendrites did not reveal a significant change, thus suggesting that Aβ impaired axonal vesicle clusters. In addition, electrophysiological patch-clamp recordings of AMPA receptor-mediated miniature EPSCs revealed an Aβ-induced reduction in amplitudes, indicating an impairment of postsynaptic AMPA receptors. A loss of postsynaptic AMPA receptor clusters was confirmed by immunocytochemical stainings for GluA1. Incubation with Aβ for 8 days did not result in a significant loss of neurites or cell death. In summary, we describe a highly reproducible cellular AD model based on human iPSC-derived cortical neurons that enables the mechanistic analysis of Aβ-induced synaptic pathomechanisms and the development of novel therapeutic approaches.
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Affiliation(s)
- K Nieweg
- 1] Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany [2] Institute of Pharmacology and Clinical Pharmacy, Phillips University, Marburg, Germany
| | - A Andreyeva
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - B van Stegen
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - G Tanriöver
- Institute of Pharmacology and Clinical Pharmacy, Phillips University, Marburg, Germany
| | - K Gottmann
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
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Kanzafarova RF, Kazantseva AV, Khusnutdinova EK. Genetic and environmental aspects of mathematical disabilities. RUSS J GENET+ 2015. [DOI: 10.1134/s1022795415010032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Friedman LG, Benson DL, Huntley GW. Cadherin-based transsynaptic networks in establishing and modifying neural connectivity. Curr Top Dev Biol 2015; 112:415-65. [PMID: 25733148 DOI: 10.1016/bs.ctdb.2014.11.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
It is tacitly understood that cell adhesion molecules (CAMs) are critically important for the development of cells, circuits, and synapses in the brain. What is less clear is what CAMs continue to contribute to brain structure and function after the early period of development. Here, we focus on the cadherin family of CAMs to first briefly recap their multidimensional roles in neural development and then to highlight emerging data showing that with maturity, cadherins become largely dispensible for maintaining neuronal and synaptic structure, instead displaying new and narrower roles at mature synapses where they critically regulate dynamic aspects of synaptic signaling, structural plasticity, and cognitive function. At mature synapses, cadherins are an integral component of multiprotein networks, modifying synaptic signaling, morphology, and plasticity through collaborative interactions with other CAM family members as well as a variety of neurotransmitter receptors, scaffolding proteins, and other effector molecules. Such recognition of the ever-evolving functions of synaptic cadherins may yield insight into the pathophysiology of brain disorders in which cadherins have been implicated and that manifest at different times of life.
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Affiliation(s)
- Lauren G Friedman
- Fishberg Department of Neuroscience, Friedman Brain Institute and the Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Deanna L Benson
- Fishberg Department of Neuroscience, Friedman Brain Institute and the Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, USA
| | - George W Huntley
- Fishberg Department of Neuroscience, Friedman Brain Institute and the Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, USA.
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31
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Bastías-Candia S, Braidy N, Zolezzi JM, Inestrosa NC. Teneurins and Alzheimer's disease: a suggestive role for a unique family of proteins. Med Hypotheses 2015; 84:402-7. [PMID: 25665860 DOI: 10.1016/j.mehy.2015.01.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 01/12/2015] [Accepted: 01/21/2015] [Indexed: 12/14/2022]
Abstract
Alzheimer's disease is a debilitating age-related disorder characterized by distinct pathological hallmarks, such as progressive memory loss and cognitive impairment. During the last few years, several cellular signaling pathways have been associated with the pathogenesis of Alzheimer's disease, such as Notch, mTOR and Wnt. However, the potential factors that modulate these pathways and novel molecular mechanisms that might account for the pathogenesis of Alzheimer's disease or for therapy against this disease are still matters of intense research. Teneurins are members of a unique protein system that has recently been proposed as a novel and highly conserved regulatory signaling system in the vertebrate brain, so far related with neurite outgrowth and neuronal matching. The similitude in structure and function of teneurins with other cellular signaling pathways, suggests that they may play a critical role in Alzheimer's disease, either through the modulation of transcription factors due to the nuclear translocation of the teneurins intracellular domain, or through the activity of the corticotrophin releasing factor (CRF)-like peptide sequence, called teneurin C-terminal associated peptide. Moreover, the presence of Ca(2+)-binding motifs within teneurins structure and the Zic2-mediated Wnt/β-catenin signaling modulation, allows hypothesize a potential crosslink between teneurins and the Wnt signaling pathway, particularly. Herein, we aim to highlight the main characteristics of teneurins and propose, based on current knowledge of this family of proteins, an interesting review of their potential involvement in Alzheimer's disease.
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Affiliation(s)
- Sussy Bastías-Candia
- Laboratorio de Biología Celular y Molecular, Departamento de Biología, Facultad de Ciencias, Universidad de Tarapacá, Arica, Chile.
| | - Nady Braidy
- Centre for Healthy Brain Ageing, School of Psychiatry, UNSW Medicine, University of New South Wales, Sydney, NSW 2052, Australia
| | - Juan M Zolezzi
- Laboratorio de Biología Celular y Molecular, Departamento de Biología, Facultad de Ciencias, Universidad de Tarapacá, Arica, Chile
| | - Nibaldo C Inestrosa
- Centre for Healthy Brain Ageing, School of Psychiatry, UNSW Medicine, University of New South Wales, Sydney, NSW 2052, Australia; Centro de Envejecimiento y Regeneración (CARE), Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile; Centro de Excelencia en Biomedicina de Magallanes (CEBIMA), Universidad de Magallanes, Punta Arenas, Chile.
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Bodin S, Planchon D, Rios Morris E, Comunale F, Gauthier-Rouvière C. Flotillins in intercellular adhesion - from cellular physiology to human diseases. J Cell Sci 2014; 127:5139-47. [PMID: 25413346 DOI: 10.1242/jcs.159764] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Flotillin 1 and 2 are ubiquitous and highly conserved proteins. They were initially discovered in 1997 as being associated with specific caveolin-independent cholesterol- and glycosphingolipid-enriched membrane microdomains and as being expressed during axon regeneration. Flotillins have a role in a large number of physiopathological processes, mainly through their function in membrane receptor clustering and in the regulation of clathrin-independent endocytosis. In this Commentary, we summarize the research performed so far on the role of flotillins in cell-cell adhesion. Recent studies have demonstrated that flotillins directly regulate the formation of cadherin complexes. Indeed, flotillin microdomains are required for the dynamic association and stabilization of cadherins at cell-cell junctions and also for cadherin signaling. Moreover, because flotillins regulate endocytosis and also the actin cytoskeleton, they could have an indirect role in the assembly and stabilization of cadherin complexes. Because it has also recently been shown that flotillins are overexpressed during neurodegenerative diseases and in human cancers, where their upregulation is associated with metastasis formation and poor prognosis, understanding to what extent flotillin upregulation participates in the development of such pathologies is thus of particular interest, as well as how, at the molecular level, it might affect cell adhesion processes.
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Affiliation(s)
- Stéphane Bodin
- Equipe Labellisée Ligue Contre le Cancer, Universités Montpellier 2 et 1, CRBM, CNRS, UMR 5237, 1919 Route de Mende, 34293 Montpellier, France
| | - Damien Planchon
- Equipe Labellisée Ligue Contre le Cancer, Universités Montpellier 2 et 1, CRBM, CNRS, UMR 5237, 1919 Route de Mende, 34293 Montpellier, France
| | - Eduardo Rios Morris
- Equipe Labellisée Ligue Contre le Cancer, Universités Montpellier 2 et 1, CRBM, CNRS, UMR 5237, 1919 Route de Mende, 34293 Montpellier, France
| | - Franck Comunale
- Equipe Labellisée Ligue Contre le Cancer, Universités Montpellier 2 et 1, CRBM, CNRS, UMR 5237, 1919 Route de Mende, 34293 Montpellier, France
| | - Cécile Gauthier-Rouvière
- Equipe Labellisée Ligue Contre le Cancer, Universités Montpellier 2 et 1, CRBM, CNRS, UMR 5237, 1919 Route de Mende, 34293 Montpellier, France
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Li Q, Dong C, Li W, Bu W, Wu J, Zhao W. Neuropeptide Y protects cerebral cortical neurons by regulating microglial immune function. Neural Regen Res 2014; 9:959-67. [PMID: 25206918 PMCID: PMC4146213 DOI: 10.4103/1673-5374.133140] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/05/2014] [Indexed: 11/29/2022] Open
Abstract
Neuropeptide Y has been shown to inhibit the immunological activity of reactive microglia in the rat cerebral cortex, to reduce N-methyl-D-aspartate current (INMDA) in cortical neurons, and protect neurons. In this study, after primary cultured microglia from the cerebral cortex of rats were treated with lipopolysaccharide, interleukin-1β and tumor necrosis factor-α levels in the cell culture medium increased, and mRNA expression of these cytokines also increased. After primary cultured cortical neurons were incubated with the lipopolysaccharide-treated microglial conditioned medium, peak INMDA in neurons increased. These effects of lipopolysaccharide were suppressed by neuropeptide Y. After addition of the neuropeptide Y Y1 receptor antagonist BIBP3226, the effects of neuropeptide Y completely disappeared. These results suggest that neuropeptide Y prevents excessive production of interleukin-1β and tumor necrosis factor-α by inhibiting microglial reactivity. This reduces INMDA in rat cortical neurons, preventing excitotoxicity, thereby protecting neurons.
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Affiliation(s)
- Qijun Li
- Graduate School, Hebei Medical University, Shijiazhuang, Hebei Province, China
| | - Changzheng Dong
- Department of Functional Neurosurgery, Hebei General Hospital, Shijiazhuang, Hebei Province, China
| | - Wenling Li
- Department of Functional Neurosurgery, Hebei General Hospital, Shijiazhuang, Hebei Province, China
| | - Wei Bu
- Department of Neurosurgery, Third Hospital, Hebei Medical University, Shijiazhuang, Hebei Province, China
| | - Jiang Wu
- Department of Functional Neurosurgery, Hebei General Hospital, Shijiazhuang, Hebei Province, China
| | - Wenqing Zhao
- Graduate School, Hebei Medical University, Shijiazhuang, Hebei Province, China ; Department of Functional Neurosurgery, Hebei General Hospital, Shijiazhuang, Hebei Province, China
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34
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Porlan E, Martí-Prado B, Morante-Redolat JM, Consiglio A, Delgado AC, Kypta R, López-Otín C, Kirstein M, Fariñas I. MT5-MMP regulates adult neural stem cell functional quiescence through the cleavage of N-cadherin. Nat Cell Biol 2014; 16:629-38. [DOI: 10.1038/ncb2993] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Accepted: 05/20/2014] [Indexed: 12/14/2022]
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35
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Hooli BV, Kovacs-Vajna ZM, Mullin K, Blumenthal MA, Mattheisen M, Zhang C, Lange C, Mohapatra G, Bertram L, Tanzi RE. Rare autosomal copy number variations in early-onset familial Alzheimer's disease. Mol Psychiatry 2014; 19:676-81. [PMID: 23752245 DOI: 10.1038/mp.2013.77] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 03/19/2013] [Accepted: 04/15/2013] [Indexed: 01/08/2023]
Abstract
Over 200 rare and fully penetrant pathogenic mutations in amyloid precursor protein (APP), presenilin 1 and 2 (PSEN1 and PSEN2) cause a subset of early-onset familial Alzheimer's disease (EO-FAD). Of these, 21 cases of EO-FAD families carrying unique APP locus duplications remain the only pathogenic copy number variations (CNVs) identified to date in Alzheimer's disease (AD). Using high-density DNA microarrays, we performed a comprehensive genome-wide analysis for the presence of rare CNVs in 261 EO-FAD and early/mixed-onset pedigrees. Our analysis revealed 10 novel private CNVs in 10 EO-FAD families overlapping a set of genes that includes: A2BP1, ABAT, CDH2, CRMP1, DMRT1, EPHA5, EPHA6, ERMP1, EVC, EVC2, FLJ35024 and VLDLR. In addition, CNVs encompassing two known frontotemporal dementia genes, CHMP2B and MAPT were found. To our knowledge, this is the first study reporting rare gene-rich CNVs in EO-FAD and early/mixed-onset AD that are likely to underlie pathogenicity in familial AD and perhaps related dementias.
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Affiliation(s)
- B V Hooli
- Department of Neurology, Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Massachusetts General Hospital, Charlestown, MA, USA
| | - Z M Kovacs-Vajna
- Department of Information Engineering, University of Brescia, Brescia, Italy
| | - K Mullin
- Department of Neurology, Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Massachusetts General Hospital, Charlestown, MA, USA
| | - M A Blumenthal
- Department of Neurology, Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Massachusetts General Hospital, Charlestown, MA, USA
| | - M Mattheisen
- Channing Laboratory, Brigham and Women's Hospital, Boston MA, USA
| | - C Zhang
- Department of Neurology, Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Massachusetts General Hospital, Charlestown, MA, USA
| | - C Lange
- Department of Biostatistics, Harvard School of Public Health, Boston, MA, USA
| | - G Mohapatra
- Molecular Pathology Unit, Massachusetts General Hospital, Boston, MA, USA
| | - L Bertram
- Max-Planck Institute for Molecular Genetics, Neuropsychiatric Genetics Group, Berlin, Germany
| | - R E Tanzi
- Department of Neurology, Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Massachusetts General Hospital, Charlestown, MA, USA
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36
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Yang X, Hou D, Jiang W, Zhang C. Intercellular protein-protein interactions at synapses. Protein Cell 2014; 5:420-44. [PMID: 24756565 PMCID: PMC4026422 DOI: 10.1007/s13238-014-0054-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2014] [Accepted: 03/23/2014] [Indexed: 12/11/2022] Open
Abstract
Chemical synapses are asymmetric intercellular junctions through which neurons send nerve impulses to communicate with other neurons or excitable cells. The appropriate formation of synapses, both spatially and temporally, is essential for brain function and depends on the intercellular protein-protein interactions of cell adhesion molecules (CAMs) at synaptic clefts. The CAM proteins link pre- and post-synaptic sites, and play essential roles in promoting synapse formation and maturation, maintaining synapse number and type, accumulating neurotransmitter receptors and ion channels, controlling neuronal differentiation, and even regulating synaptic plasticity directly. Alteration of the interactions of CAMs leads to structural and functional impairments, which results in many neurological disorders, such as autism, Alzheimer's disease and schizophrenia. Therefore, it is crucial to understand the functions of CAMs during development and in the mature neural system, as well as in the pathogenesis of some neurological disorders. Here, we review the function of the major classes of CAMs, and how dysfunction of CAMs relates to several neurological disorders.
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Affiliation(s)
- Xiaofei Yang
- Key Laboratory of Cognitive Science, Laboratory of Membrane Ion Channels and Medicine, College of Biomedical Engineering, South-Central University for Nationalities, Wuhan, 430074 China
| | - Dongmei Hou
- Key Laboratory of Cognitive Science, Laboratory of Membrane Ion Channels and Medicine, College of Biomedical Engineering, South-Central University for Nationalities, Wuhan, 430074 China
- State Key Laboratory of Biomembrane and Membrane Biotechnology, College of Life Sciences, Peking University, Beijing, 100871 China
- PKU-IDG/McGovern Institute for Brain Research, Peking University, Beijing, 100871 China
| | - Wei Jiang
- Key Laboratory of Cognitive Science, Laboratory of Membrane Ion Channels and Medicine, College of Biomedical Engineering, South-Central University for Nationalities, Wuhan, 430074 China
- State Key Laboratory of Biomembrane and Membrane Biotechnology, College of Life Sciences, Peking University, Beijing, 100871 China
- PKU-IDG/McGovern Institute for Brain Research, Peking University, Beijing, 100871 China
| | - Chen Zhang
- State Key Laboratory of Biomembrane and Membrane Biotechnology, College of Life Sciences, Peking University, Beijing, 100871 China
- PKU-IDG/McGovern Institute for Brain Research, Peking University, Beijing, 100871 China
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37
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Sindi IA, Tannenberg RK, Dodd PR. Role for the neurexin-neuroligin complex in Alzheimer's disease. Neurobiol Aging 2013; 35:746-56. [PMID: 24211009 DOI: 10.1016/j.neurobiolaging.2013.09.032] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 09/20/2013] [Accepted: 09/22/2013] [Indexed: 11/29/2022]
Abstract
Synaptic damage is a critical hallmark of Alzheimer's disease, and the best correlate with cognitive impairment ante mortem. Synapses, the loci of communication between neurons, are characterized by signature protein combinations arrayed at tightly apposed pre- and post-synaptic sites. The most widely studied trans-synaptic junctional complexes, which direct synaptogenesis and foster the maintenance and stability of the mature terminal, are conjunctions of presynaptic neurexins and postsynaptic neuroligins. Fluctuations in the levels of neuroligins and neurexins can sway the balance between excitatory and inhibitory neurotransmission in the brain, and could lead to damage of synapses and dendrites. This review summarizes current understanding of the roles of neurexins and neuroligins proteolytic processing in synaptic plasticity in the human brain, and outlines their possible roles in β-amyloid metabolism and function, which are central pathogenic events in Alzheimer's disease progression.
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Affiliation(s)
- Ikhlas A Sindi
- Centre for Psychiatry and Clinical Neuroscience, School of Medicine, The University of Queensland, Brisbane, Australia
| | - Rudolph K Tannenberg
- Centre for Psychiatry and Clinical Neuroscience, School of Medicine, The University of Queensland, Brisbane, Australia; School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Peter R Dodd
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia.
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38
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Pielarski KN, van Stegen B, Andreyeva A, Nieweg K, Jüngling K, Redies C, Gottmann K. Asymmetric N-cadherin expression results in synapse dysfunction, synapse elimination, and axon retraction in cultured mouse neurons. PLoS One 2013; 8:e54105. [PMID: 23382872 PMCID: PMC3561303 DOI: 10.1371/journal.pone.0054105] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2012] [Accepted: 12/10/2012] [Indexed: 01/27/2023] Open
Abstract
Synapse elimination and pruning of axon collaterals are crucial developmental events in the refinement of neuronal circuits. While a control of synapse formation by adhesion molecules is well established, the involvement of adhesion molecules in developmental synapse loss is poorly characterized. To investigate the consequences of mis-match expression of a homophilic synaptic adhesion molecule, we analysed an asymmetric, exclusively postsynaptic expression of N-cadherin. This was induced by transfecting individual neurons in cultures of N-cadherin knockout mouse neurons with a N-cadherin expression vector. 2 days after transfection, patch-clamp analysis of AMPA receptor-mediated miniature postsynaptic currents revealed an impaired synaptic function without a reduction in the number of presynaptic vesicle clusters. Long-term asymmetric expression of N-cadherin for 8 days subsequently led to synapse elimination as indicated by a loss of colocalization of presynaptic vesicles and postsynaptic PSD95 protein. We further studied long-term asymmetric N-cadherin expression by conditional, Cre-induced knockout of N-cadherin in individual neurons in cultures of N-cadherin expressing cortical mouse neurons. This resulted in a strong retraction of axonal processes in individual neurons that lacked N-cadherin protein. Moreover, an in vivo asymmetric expression of N-cadherin in the developmentally transient cortico-tectal projection was indicated by in-situ hybridization with layer V neurons lacking N-cadherin expression. Thus, mis-match expression of N-cadherin might contribute to selective synaptic connectivity.
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Affiliation(s)
- Kim N. Pielarski
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Bernd van Stegen
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Aksana Andreyeva
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Katja Nieweg
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Kay Jüngling
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Christoph Redies
- Institute of Anatomy I, University of Jena School of Medicine, Jena University Hospital, Jena, Germany
| | - Kurt Gottmann
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
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Paulson AF, Prasad MS, Thuringer AH, Manzerra P. Regulation of cadherin expression in nervous system development. Cell Adh Migr 2013; 8:19-28. [PMID: 24526207 DOI: 10.4161/cam.27839] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
This review addresses our current understanding of the regulatory mechanisms for classical cadherin expression during development of the vertebrate nervous system. The complexity of the spatial and temporal expression patterns is linked to morphogenic and functional roles in the developing nervous system. While the regulatory networks controlling cadherin expression are not well understood, it is likely that the multiple signaling pathways active in the development of particular domains also regulate the specific cadherins expressed at that time and location. With the growing understanding of the broader roles of cadherins in cell-cell adhesion and non-adhesion processes, it is important to understand both the upstream regulation of cadherin expression and the downstream effects of specific cadherins within their cellular context.
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Affiliation(s)
- Alicia F Paulson
- Division of Basic Biomedical Sciences; Sanford School of Medicine of The University of South Dakota; Vermillion, SD USA
| | - Maneeshi S Prasad
- Department of Molecular Biosciences; Northwestern University; Evanston, IL USA
| | | | - Pasquale Manzerra
- Division of Basic Biomedical Sciences; Sanford School of Medicine of The University of South Dakota; Vermillion, SD USA
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40
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Insights into synaptotoxicity in AD. Nat Rev Neurol 2012; 8:357. [DOI: 10.1038/nrneurol.2012.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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