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Hu HL, Khatri L, Santacruz M, Church E, Moore C, Huang TT, Chao MV. Confronting the loss of trophic support. Front Mol Neurosci 2023; 16:1179209. [PMID: 37456526 PMCID: PMC10338843 DOI: 10.3389/fnmol.2023.1179209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 05/23/2023] [Indexed: 07/18/2023] Open
Abstract
Classic experiments with peripheral sympathetic neurons established an absolute dependence upon NGF for survival. A forgotten problem is how these neurons become resistant to deprivation of trophic factors. The question is whether and how neurons can survive in the absence of trophic support. However, the mechanism is not understood how neurons switch their phenotype to lose their dependence on trophic factors, such as NGF and BDNF. Here, we approach the problem by considering the requirements for trophic support of peripheral sympathetic neurons and hippocampal neurons from the central nervous system. We developed cellular assays to assess trophic factor dependency for sympathetic and hippocampal neurons and identified factors that rescue neurons in the absence of trophic support. They include enhanced expression of a subunit of the NGF receptor (Neurotrophin Receptor Homolog, NRH) in sympathetic neurons and an increase of the expression of the glucocorticoid receptor in hippocampal neurons. The results are significant since levels and activity of trophic factors are responsible for many neuropsychiatric conditions. Resistance of neurons to trophic factor deprivation may be relevant to the underlying basis of longevity, as well as an important element in preventing neurodegeneration.
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Affiliation(s)
- Hui-Lan Hu
- Department of Biochemistry and Molecular Pharmacology, New York University Langone School of Medicine, New York, NY, United States
| | - Latika Khatri
- Skirball Institute for Biomolecular Medicine, Neuroscience Institute, New York University Langone Medical Center, New York, NY, United States
| | - Marilyn Santacruz
- Department of Neuroscience, Pomona College, Claremont, CA, United States
| | - Emily Church
- Department of Neuroscience, Pomona College, Claremont, CA, United States
| | - Christopher Moore
- Skirball Institute for Biomolecular Medicine, Neuroscience Institute, New York University Langone Medical Center, New York, NY, United States
| | - Tony T. Huang
- Department of Biochemistry and Molecular Pharmacology, New York University Langone School of Medicine, New York, NY, United States
| | - Moses V. Chao
- Skirball Institute for Biomolecular Medicine, Neuroscience Institute, New York University Langone Medical Center, New York, NY, United States
- Department of Cell Biology, New York Langone Medical Center, New York, NY, United States
- Department of Psychiatry, New York Langone Medical Center, New York, NY, United States
- Department of Neuroscience and Physiology, New York Langone Medical Center, New York, NY, United States
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Vaes JEG, Brandt MJV, Wanders N, Benders MJNL, de Theije CGM, Gressens P, Nijboer CH. The impact of trophic and immunomodulatory factors on oligodendrocyte maturation: Potential treatments for encephalopathy of prematurity. Glia 2020; 69:1311-1340. [PMID: 33595855 PMCID: PMC8246971 DOI: 10.1002/glia.23939] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 11/11/2020] [Accepted: 11/12/2020] [Indexed: 12/11/2022]
Abstract
Encephalopathy of prematurity (EoP) is a major cause of morbidity in preterm neonates, causing neurodevelopmental adversities that can lead to lifelong impairments. Preterm birth-related insults, such as cerebral oxygen fluctuations and perinatal inflammation, are believed to negatively impact brain development, leading to a range of brain abnormalities. Diffuse white matter injury is a major hallmark of EoP and characterized by widespread hypomyelination, the result of disturbances in oligodendrocyte lineage development. At present, there are no treatment options available, despite the enormous burden of EoP on patients, their families, and society. Over the years, research in the field of neonatal brain injury and other white matter pathologies has led to the identification of several promising trophic factors and cytokines that contribute to the survival and maturation of oligodendrocytes, and/or dampening neuroinflammation. In this review, we discuss the current literature on selected factors and their therapeutic potential to combat EoP, covering a wide range of in vitro, preclinical and clinical studies. Furthermore, we offer a future perspective on the translatability of these factors into clinical practice.
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Affiliation(s)
- Josine E G Vaes
- Department for Developmental Origins of Disease, University Medical Center Utrecht Brain Center and Wilhelmina Children's Hospital, Utrecht University, Utrecht, The Netherlands.,Department of Neonatology, University Medical Center Utrecht Brain Center and Wilhelmina Children's Hospital, Utrecht University, Utrecht, The Netherlands
| | - Myrna J V Brandt
- Department for Developmental Origins of Disease, University Medical Center Utrecht Brain Center and Wilhelmina Children's Hospital, Utrecht University, Utrecht, The Netherlands
| | - Nikki Wanders
- Department for Developmental Origins of Disease, University Medical Center Utrecht Brain Center and Wilhelmina Children's Hospital, Utrecht University, Utrecht, The Netherlands
| | - Manon J N L Benders
- Department of Neonatology, University Medical Center Utrecht Brain Center and Wilhelmina Children's Hospital, Utrecht University, Utrecht, The Netherlands
| | - Caroline G M de Theije
- Department for Developmental Origins of Disease, University Medical Center Utrecht Brain Center and Wilhelmina Children's Hospital, Utrecht University, Utrecht, The Netherlands
| | | | - Cora H Nijboer
- Department for Developmental Origins of Disease, University Medical Center Utrecht Brain Center and Wilhelmina Children's Hospital, Utrecht University, Utrecht, The Netherlands
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Nadezhdin KD, Goncharuk SA, Arseniev AS, Mineev KS. NMR structure of a full-length single-pass membrane protein NRADD. Proteins 2019; 87:786-790. [PMID: 31033000 DOI: 10.1002/prot.25703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 04/05/2019] [Accepted: 04/23/2019] [Indexed: 01/22/2023]
Abstract
Structural study of any single-pass membrane protein is both an important and challenging task. In this report, we present the structure of a neurotrophin receptor-alike death-domain protein. The structure and dynamics of the protein was investigated by conventional nuclear magnetic resonance techniques in the solution of phospholipid bicelles. The receptor contains two folded regions-α-helical transmembrane domain and globular C-terminal death domain with more than 50% of the rest of backbone being disordered. This is the first structure of a full-length single-pass membrane receptor-alike protein solved by the single method.
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Affiliation(s)
- Kirill D Nadezhdin
- Laboratory of biomolecular NMR spectroscopy, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Moscow, Russia.,Department of biological and medical physics, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Sergey A Goncharuk
- Laboratory of biomolecular NMR spectroscopy, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Moscow, Russia
| | - Aleksander S Arseniev
- Laboratory of biomolecular NMR spectroscopy, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Moscow, Russia.,Department of biological and medical physics, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Konstantin S Mineev
- Laboratory of biomolecular NMR spectroscopy, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Moscow, Russia.,Department of biological and medical physics, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
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Sung TC, Chen Z, Thuret S, Vilar M, Gage FH, Riek R, Lee KF. P45 forms a complex with FADD and promotes neuronal cell survival following spinal cord injury. PLoS One 2013; 8:e69286. [PMID: 23935974 PMCID: PMC3720591 DOI: 10.1371/journal.pone.0069286] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Accepted: 06/06/2013] [Indexed: 12/02/2022] Open
Abstract
Fas-associated death domain (DD) adaptor (FADD), a member of the DD superfamily, contains both a DD and a death effector domain (DED) that are important in mediating FAS ligand-induced apoptotic signaling. P45 is a unique member of the DD superfamily in that it has a domain with sequence and structural characteristics of both DD and DED. We show that p45 forms a complex with FADD and diminishes Fas-FADD mediated death signaling. The DED of FADD is required for the complex formation with p45. Following spinal cord injury, transgenic mice over-expressing p45 exhibit increased neuronal survival, decreased retraction of corticospinal tract fibers and improved functional recovery. Understanding p45-mediated cellular and molecular mechanisms may provide insights into facilitating nerve regeneration in humans.
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Affiliation(s)
- Tsung-Chang Sung
- Clayton Foundation Laboratories for Peptide Biology, The Salk Institute, La Jolla, California, United States of America
| | - Zhijiang Chen
- Clayton Foundation Laboratories for Peptide Biology, The Salk Institute, La Jolla, California, United States of America
| | - Sandrine Thuret
- Clayton Foundation Laboratories for Peptide Biology, The Salk Institute, La Jolla, California, United States of America
- Centre for the Cellular Basis of Behaviour & Medical Research Council Centre for Neurodegeneration Research, Institute of Psychiatry, King’s College London, London, United Kingdom
| | - Marçal Vilar
- Clayton Foundation Laboratories for Peptide Biology, The Salk Institute, La Jolla, California, United States of America
- Neurodegeneration Unit, Instituto de Salud Carlos III, Madrid, Spain
| | - Fred H. Gage
- Clayton Foundation Laboratories for Peptide Biology, The Salk Institute, La Jolla, California, United States of America
| | - Roland Riek
- Clayton Foundation Laboratories for Peptide Biology, The Salk Institute, La Jolla, California, United States of America
- Laboratory for Physical Chemistry, Eidgenössische Technische Hochschule Zürich, Zürich, Switzerland
| | - Kuo-Fen Lee
- Clayton Foundation Laboratories for Peptide Biology, The Salk Institute, La Jolla, California, United States of America
- * E-mail:
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Oligodendroglial expression of TrkB independently regulates myelination and progenitor cell proliferation. J Neurosci 2013; 33:4947-57. [PMID: 23486965 DOI: 10.1523/jneurosci.3990-12.2013] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The neurotrophin brain-derived neurotrophic factor (BDNF) has been implicated in regulating CNS myelination. BDNF mutant mice exhibit a hypomyelinating phenotype, and BDNF exerts distinct effects upon oligodendroglial proliferation, differentiation, and myelination in vitro. To investigate the precise influence that BDNF exerts in regulating CNS myelination in vivo, we have generated conditional knock-out mice in which TrkB has been deleted specifically in oligodendrocytes. Deletion of TrkB disrupted normal oligodendrocyte myelination, resulting in a significant reduction in myelin protein expression and myelination of CNS white matter tracts during development. Importantly, conditional knock-out mice exhibited normal numbers of mature oligodendrocytes and normal numbers of myelinated axons; however, myelin thickness was significantly reduced during development. These data indicate that while TrkB expression in oligodendrocytes plays no role in the initial contact with axons, it exerts an important influence in subsequent stages to promote myelin ensheathment. The conditional knock-out mice also exhibited an increased density of oligodendrocyte progenitor cells (OPCs) in CNS white matter tracts. Concordant with these results, in vitro analyses using OPCs subjected to TrkB knockdown also revealed increased OPC proliferation. Our data suggested this effect was dependent upon TrkC and p75 expression. Thus, our data demonstrate that TrkB expression in oligodendroglia exerts a direct effect on oligodendrocytes to promote myelination and an indirect effect upon the OPC population, modifying their proliferative potential.
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