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Paoletti F. ATP binding to Nerve Growth Factor (NGF) and pro-Nerve Growth Factor (proNGF): an endogenous molecular switch modulating neurotrophins activity. Biochem Soc Trans 2024; 52:1293-1304. [PMID: 38716884 DOI: 10.1042/bst20231089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/19/2024] [Accepted: 04/22/2024] [Indexed: 06/27/2024]
Abstract
ATP has recently been reconsidered as a molecule with functional properties which go beyond its recognized role of the energetic driver of the cell. ATP has been described as an allosteric modulator as well as a biological hydrotrope with anti-aggregation properties in the crowded cellular environment. The role of ATP as a modulator of the homeostasis of the neurotrophins (NTs), a growth factor protein family whose most known member is the nerve growth factor (NGF), has been investigated. The modulation of NTs by small endogenous ligands is still a scarcely described area, with few papers reporting on the topic, and very few reports on the molecular determinants of these interactions. However, a detailed atomistic description of the NTs interaction landscape is of urgent need, aiming at the identification of novel molecules as potential therapeutics and considering the wide range of potential pharmacological applications for NGF and its family members. This mini-review will focus on the unique cartography casting the interactions of the endogenous ligand ATP, in the interaction with NGF as well as with its precursor proNGF. These interactions revealed interesting features of the ATP binding and distinct differences in the binding mode between the highly structured mature NGF and its precursor, proNGF, which is characterized by an intrinsically unstructured domain. The overview on the recent available data will be presented, together with the future perspectives on the field.
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Affiliation(s)
- Francesca Paoletti
- Institute of Crystallography - C.N.R. - Trieste Outstation, Area Science Park - Basovizza, S.S.14 - Km. 163.5, I-34149 Trieste, Italy
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Wu Y, Rakotoarisoa M, Angelov B, Deng Y, Angelova A. Self-Assembled Nanoscale Materials for Neuronal Regeneration: A Focus on BDNF Protein and Nucleic Acid Biotherapeutic Delivery. NANOMATERIALS 2022; 12:nano12132267. [PMID: 35808102 PMCID: PMC9268293 DOI: 10.3390/nano12132267] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/26/2022] [Accepted: 06/27/2022] [Indexed: 02/04/2023]
Abstract
Enabling challenging applications of nanomedicine and precision medicine in the treatment of neurodegenerative disorders requires deeper investigations of nanocarrier-mediated biomolecular delivery for neuronal targeting and recovery. The successful use of macromolecular biotherapeutics (recombinant growth factors, antibodies, enzymes, synthetic peptides, cell-penetrating peptide–drug conjugates, and RNAi sequences) in clinical developments for neuronal regeneration should benefit from the recent strategies for enhancement of their bioavailability. We highlight the advances in the development of nanoscale materials for drug delivery in neurodegenerative disorders. The emphasis is placed on nanoformulations for the delivery of brain-derived neurotrophic factor (BDNF) using different types of lipidic nanocarriers (liposomes, liquid crystalline or solid lipid nanoparticles) and polymer-based scaffolds, nanofibers and hydrogels. Self-assembled soft-matter nanoscale materials show favorable neuroprotective characteristics, safety, and efficacy profiles in drug delivery to the central and peripheral nervous systems. The advances summarized here indicate that neuroprotective biomolecule-loaded nanoparticles and injectable hydrogels can improve neuronal survival and reduce tissue injury. Certain recently reported neuronal dysfunctions in long-COVID-19 survivors represent early manifestations of neurodegenerative pathologies. Therefore, BDNF delivery systems may also help in prospective studies on recovery from long-term COVID-19 neurological complications and be considered as promising systems for personalized treatment of neuronal dysfunctions and prevention or retarding of neurodegenerative disorders.
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Affiliation(s)
- Yu Wu
- CNRS, Institut Galien Paris-Saclay, Université Paris-Saclay, F-92290 Châtenay-Malabry, France; (Y.W.); (M.R.)
| | - Miora Rakotoarisoa
- CNRS, Institut Galien Paris-Saclay, Université Paris-Saclay, F-92290 Châtenay-Malabry, France; (Y.W.); (M.R.)
| | - Borislav Angelov
- Institute of Physics, ELI Beamlines, Academy of Sciences of the Czech Republic, Na Slovance 2, CZ-18221 Prague, Czech Republic;
| | - Yuru Deng
- Wenzhou Institute, University of Chinese Academy of Sciences, No. 1, Jinlian Road, Longwan District, Wenzhou 325001, China;
| | - Angelina Angelova
- CNRS, Institut Galien Paris-Saclay, Université Paris-Saclay, F-92290 Châtenay-Malabry, France; (Y.W.); (M.R.)
- Correspondence:
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The functional mechanism of bone marrow-derived mesenchymal stem cells in the treatment of animal models with Alzheimer's disease: crosstalk between autophagy and apoptosis. Stem Cell Res Ther 2022; 13:90. [PMID: 35241159 PMCID: PMC8895531 DOI: 10.1186/s13287-022-02765-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 11/24/2021] [Indexed: 12/25/2022] Open
Abstract
The transplantation of bone marrow-derived mesenchymal stem cells (BMMSCs) alleviates neuropathology and improves cognitive deficits in animal models with Alzheimer's disease. However, the underlying mechanism remains undefined. Based on meta-analysis and comprehensive review, high-profile studies support the theory that transplanted BMMSCs activate autophagy, as evidenced by the expression levels of signal molecules such as Beclin-1, Atg5, LC3-II, and mTOR. Functional autophagy mitigates neuronal apoptosis, which is reflected by the alterations of IAPs, Bcl-2, caspase-3, and so forth. Moreover, the transplantation of BMMSCs can decrease aberrant amyloid-beta peptides as well as tau aggregates, inhibit neuroinflammation, and stimulate synaptogenesis. There is a signal crosstalk between autophagy and apoptosis, which may be regulated to produce synergistic effect on the preconditioning of stem cells. Forasmuch, the therapeutic effect of transplanted BMMSCs can be enhanced by autophagy and/or apoptosis modulators.
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Paoletti F, Lamba D. Small Endogenous Ligands Modulation of Nerve Growth Factor Bioactivity: A Structural Biology Overview. Cells 2021; 10:cells10123462. [PMID: 34943971 PMCID: PMC8700322 DOI: 10.3390/cells10123462] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/01/2021] [Accepted: 12/03/2021] [Indexed: 01/12/2023] Open
Abstract
Experiments with cell cultures and animal models have provided solid support for the assumption that Nerve Growth Factor (NGF) plays a key role in the regulation of neuronal cell survival and death. Recently, endogenous ligands have been proposed as physiological modulators of NGF biological activity as part of this regulatory cascade. However, the structural and mechanistic determinants for NGF bioactivity remain to be elucidated. We recently unveiled, by an integrated structural biology approach, the ATP binding sites of NGF and investigated the effects on TrkA and p75NTR receptors binding. These results pinpoint ATP as a genuine endogenous modulator of NGF signaling, paving the way to the characterization of not-yet-identified chemical diverse endogenous biological active small molecules as novel modulators of NGF. The present review aims at providing an overview of the currently available 3D structures of NGF in complex with different small endogenous ligands, featuring the molecular footprints of the small molecules binding. This knowledge is essential for further understanding the functional role of small endogenous ligands in the modulation of neurotrophins signaling in physiological and pathological conditions and for better exploiting the therapeutic potentialities of NGF.
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Affiliation(s)
- Francesca Paoletti
- Laboratory for Molecular Structural Dynamics, Theory Department, National Institute of Chemistry, SI-1001 Ljubljana, Slovenia
- Correspondence:
| | - Doriano Lamba
- Institute of Crystallography—C.N.R.—Trieste Outstation, Area Science Park—Basovizza, I-34149 Trieste, Italy;
- Interuniversity Consortium “Biostructures and Biosystems National Institute”, I-00136 Roma, Italy
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Paoletti F, Merzel F, Cassetta A, Ogris I, Covaceuszach S, Grdadolnik J, Lamba D, Golič Grdadolnik S. Endogenous modulators of neurotrophin signaling: Landscape of the transient ATP-NGF interactions. Comput Struct Biotechnol J 2021; 19:2938-2949. [PMID: 34136093 PMCID: PMC8164016 DOI: 10.1016/j.csbj.2021.05.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/29/2021] [Accepted: 05/02/2021] [Indexed: 12/02/2022] Open
Abstract
High-resolution solution NMR structure of rhNGF has been determined. Quinary interactions characterize ATP binding to rhNGF. SPR, ITC and STD-NMR reveal ATP binding to rhNGF with mM affinity. NMR and MD analysis pinpoint to the presence of two binding sites of ATP on rhNGF. Stoichiometry of ATP-Mg2+ or Zn2+-rhNGF mixtures affects KD affinity to TrkA/p75NTR.
The Nerve Growth Factor (NGF) neurotrophin acts in the maintenance and growth of neuronal populations. Despite the detailed knowledge of NGF’s role in neuron physiology, the structural and mechanistic determinants of NGF bioactivity modulated by essential endogenous ligands are still lacking. We present the results of an integrated structural and advanced computational approach to characterize the extracellular ATP-NGF interaction. We mapped by NMR the interacting surface and ATP orientation on NGF and revealed the functional role of this interaction in the binding to TrkA and p75NTR receptors by SPR. The role of divalent ions was explored in conjunction with ATP. Our results pinpoint ATP as a likely transient molecular modulator of NGF signaling, in health and disease states.
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Key Words
- ARIA, Ambiguous Restraints for Iterative Assignment
- ATP modulation
- BDNF, Brain Derived Neurotrophic Factor
- CARA, Computer Aided Resonance Assignment
- CS-E, Chrondroitin Sulfate E
- CSP, Chemical Shift Perturbation
- DSF, Differential Scanning Fluorimetry
- EI-MS, Electron Ionization Mass Spectrometry
- Endogenous ligands
- FGF2, Fibroblast Growth Factor 2
- FT-IR, Fourier Transform Infrared Spectroscopy
- HBD, Heparin Binding Domain
- HSQC, Heteronuclear Single Quantum Coherence
- ITC, Isothermal Titration Calorimetry
- MALDI-TOF MS, Matrix Assisted Laser Desorption Ionization-Time Of Flight Mass Spectrometry
- MD, Molecular Dynamics
- MS, Mass Spectrometry
- NGF interactions
- NGF, Nerve Growth Factor
- NMR, Nuclear Magnetic Resonance
- NOE, Nuclear Overhouser Effect
- NOESY, Nuclear Overhauser Effect Spectroscopy
- NT, NeuroTrophin
- Neurotrophins
- P20, Polysorbate 20
- PME, Particle Mesh Ewald
- RMSD, Root Mean Square Deviation
- SAR, Structure-Activity Relationship
- SPR, Surface Plasmon Resonance
- STD, Saturation-Transfer Difference
- TrkA, Tyrosine Kinase Receptor A
- TrkA, p75NTR receptors
- p75NTR, p75 NeuroTrophin Receptor
- proNGF, proNGF – NGF precursor
- rh-proNGF, recombinant human proNGF – NGF precursor
- rhNGF, recombinant human NGF
- rmNGF, recombinant mouse NGF
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Affiliation(s)
- Francesca Paoletti
- Laboratory for Molecular Structural Dynamics, Theory Department, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, Slovenia
| | - Franci Merzel
- Laboratory for Molecular Structural Dynamics, Theory Department, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, Slovenia
| | - Alberto Cassetta
- Institute of Crystallography - C.N.R.- Trieste Outstation. Area Science Park - Basovizza, S.S.14 - Km. 163.5, I-34149 Trieste, Italy
| | - Iza Ogris
- Laboratory for Molecular Structural Dynamics, Theory Department, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, Slovenia
| | - Sonia Covaceuszach
- Institute of Crystallography - C.N.R.- Trieste Outstation. Area Science Park - Basovizza, S.S.14 - Km. 163.5, I-34149 Trieste, Italy
| | - Jože Grdadolnik
- Laboratory for Molecular Structural Dynamics, Theory Department, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, Slovenia
| | - Doriano Lamba
- Institute of Crystallography - C.N.R.- Trieste Outstation. Area Science Park - Basovizza, S.S.14 - Km. 163.5, I-34149 Trieste, Italy.,Interuniversity Consortium "Biostructures and Biosystems National Institute", Viale delle Medaglie d'Oro 305, I-00136 Roma, Italy
| | - Simona Golič Grdadolnik
- Laboratory for Molecular Structural Dynamics, Theory Department, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, Slovenia
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Leviton A, Allred EN, Yamamoto H, Fichorova RN, Kuban K, O'Shea TM, Dammann O. Antecedents and correlates of blood concentrations of neurotrophic growth factors in very preterm newborns. Cytokine 2017; 94:21-28. [PMID: 28396037 PMCID: PMC5464409 DOI: 10.1016/j.cyto.2017.03.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 01/18/2017] [Accepted: 03/31/2017] [Indexed: 11/16/2022]
Abstract
AIM To identify the antecedents and very early correlates of low concentrations of neurotrophic growth factors in the blood of extremely preterm newborns during the first postnatal month. METHODS Using an immunobead assay, we measured the concentrations of neurotrophin 4 (NT4), brain-derived neurotrophic factor (BDNF), and basic fibroblast growth factor (bFGF) in blood spots collected on postnatal days 1 (N=1062), 7 (N=1087), 14 (N=989), 21 (N=940) and 28 (N=880) from infants born before the 28th week of gestation. We then sought the correlates of measurements in the top and bottom quartiles for gestational age and day the specimen was collected. RESULTS The concentrations of 2 neurotrophic proteins, NT4 and BDNF, were low among children delivered for medical (maternal or fetal) indications, and among those who were growth restricted. Children who had top quartile concentrations of NT4, BDNF, and bFGF tended to have elevated concentrations of inflammation-related proteins that day. This pattern persisted for much of the first postnatal month. CONCLUSIONS Delivery for medical indications and fetal growth restriction are associated with a relative paucity of NT4 and BDNF concentrations during the first 24 h after very preterm birth. Elevated blood concentrations of NT4, BDNF, and bFGF tended to co-occur with indicators of systemic inflammation on the same day.
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Affiliation(s)
- Alan Leviton
- Boston Children's Hospital, and Harvard Medical School, Boston, MA, United States.
| | - Elizabeth N Allred
- Boston Children's Hospital, and Harvard Medical School, Boston, MA, United States
| | | | - Raina N Fichorova
- Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
| | - Karl Kuban
- Boston Medical Center and Boston University, Boston, MA, United States
| | | | - Olaf Dammann
- Tufts University School of Medicine, Boston, MA, United States; Hannover Medical School, Hannover, Germany
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Zhou W, Zhang J, Wang G, Ling L, Yan C. Permeability and distribution of nerve growth factor in the brain of neonatal rats by periphery venous injection in hypoxic-ischemic state. SPRINGERPLUS 2016; 5:1893. [PMID: 27843750 PMCID: PMC5084138 DOI: 10.1186/s40064-016-3594-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Accepted: 10/21/2016] [Indexed: 12/23/2022]
Abstract
Objective To investigate the permeability of β-NGF through blood–brain-barrier (BBB) in neonatal and adult rats, and the spatial distribution of β-NGF in different brain regions in hypoxic-ischemic (HI) and normal neonatal rats. Methods To investigate the overall permeability of β-NGF through BBB, β-NGF labeled with I125 was injected into adult rats, neonatal rats and HI neonatal rats via tail vein. The radioactivity of brain tissue and blood was examined and analyzed 30 min after injection. Also, brain regions including the basal forebrain, frontal cortex, hippocampus, hypothalamus, cerebellum, bulbus olfactorius and hypophysis, of all the rats were dissected and radioactivity was examined to investigate the spatial specificity of NGF permeation through BBB. Results Statistically significant results were observed in I125-β-NGF contents in brain tissues of adult rats group, neonatal rats group and HI neonatal rats group (P < 0.05). Compared to the HI neonatal rats’ brain with the highest I125-β-NGF contents, normal neonatal rats ranks the second while the adult rats were the lowest. While for the spatial specificity examination part, I125-β-NGF in both HI group and control group were widely distributed in basal forebrain, frontal cortex, hippocampus, cerebellum and bulbus olfactorius. But the radioactivity in frontal cortex, hippocampus and cerebellum of HI groups are statistically higher than control groups (P < 0.05). Conclusion β-NGF can more easily penetrate the BBB of newborn rats than adult rats via peripheral venous administration and this effect can be enhanced by HI insult. Also, this HI-induced permeation of β-NGF through BBB is more obvious in frontal cortex, hippocampus and cerebellum.
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Affiliation(s)
- Wenli Zhou
- Department of Neonatology, The First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130021 Jilin China
| | - Jiantao Zhang
- Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun, 130021 Jilin China
| | - Guangming Wang
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, 130021 Jilin China
| | - Limian Ling
- Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun, 130021 Jilin China
| | - Chaoying Yan
- Department of Neonatology, The First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130021 Jilin China
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Corrigan F, Arulsamy A, Teng J, Collins-Praino LE. Pumping the Brakes: Neurotrophic Factors for the Prevention of Cognitive Impairment and Dementia after Traumatic Brain Injury. J Neurotrauma 2016; 34:971-986. [PMID: 27630018 DOI: 10.1089/neu.2016.4589] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Traumatic brain injury (TBI) is the leading cause of disability and death worldwide, affecting as many as 54,000,000-60,000,000 people annually. TBI is associated with significant impairments in brain function, impacting cognitive, emotional, behavioral, and physical functioning. Although much previous research has focused on the impairment immediately following injury, TBI may have much longer-lasting consequences, including neuropsychiatric disorders and cognitive impairment. TBI, even mild brain injury, has also been recognized as a significant risk factor for the later development of dementia and Alzheimer's disease. Although the link between TBI and dementia is currently unknown, several proposed mechanisms have been put forward, including alterations in glucose metabolism, excitotoxicity, calcium influx, mitochondrial dysfunction, oxidative stress, and neuroinflammation. A treatment for the devastating long-term consequences of TBI is desperately needed. Unfortunately, however, no such treatment is currently available, making this a major area of unmet medical need. Increasing the level of neurotrophic factor expression in key brain areas may be one potential therapeutic strategy. Of the neurotrophic factors, granulocyte-colony stimulating factor (G-CSF) may be particularly effective for preventing the emergence of long-term complications of TBI, including dementia, because of its ability to reduce apoptosis, stimulate neurogenesis, and increase neuroplasticity.
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Affiliation(s)
- Frances Corrigan
- Translational Neuropathology Lab, Discipline of Anatomy and Pathology, School of Medicine, University of Adelaide , Adelaide, Australia
| | - Alina Arulsamy
- Translational Neuropathology Lab, Discipline of Anatomy and Pathology, School of Medicine, University of Adelaide , Adelaide, Australia
| | - Jason Teng
- Translational Neuropathology Lab, Discipline of Anatomy and Pathology, School of Medicine, University of Adelaide , Adelaide, Australia
| | - Lyndsey E Collins-Praino
- Translational Neuropathology Lab, Discipline of Anatomy and Pathology, School of Medicine, University of Adelaide , Adelaide, Australia
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Quaegebeur A, Segura I, Schmieder R, Verdegem D, Decimo I, Bifari F, Dresselaers T, Eelen G, Ghosh D, Davidson SM, Schoors S, Broekaert D, Cruys B, Govaerts K, De Legher C, Bouché A, Schoonjans L, Ramer MS, Hung G, Bossaert G, Cleveland DW, Himmelreich U, Voets T, Lemmens R, Bennett CF, Robberecht W, De Bock K, Dewerchin M, Ghesquière B, Fendt SM, Carmeliet P. Deletion or Inhibition of the Oxygen Sensor PHD1 Protects against Ischemic Stroke via Reprogramming of Neuronal Metabolism. Cell Metab 2016; 23:280-91. [PMID: 26774962 PMCID: PMC4880550 DOI: 10.1016/j.cmet.2015.12.007] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 10/30/2015] [Accepted: 12/11/2015] [Indexed: 01/08/2023]
Abstract
The oxygen-sensing prolyl hydroxylase domain proteins (PHDs) regulate cellular metabolism, but their role in neuronal metabolism during stroke is unknown. Here we report that PHD1 deficiency provides neuroprotection in a murine model of permanent brain ischemia. This was not due to an increased collateral vessel network. Instead, PHD1(-/-) neurons were protected against oxygen-nutrient deprivation by reprogramming glucose metabolism. Indeed, PHD1(-/-) neurons enhanced glucose flux through the oxidative pentose phosphate pathway by diverting glucose away from glycolysis. As a result, PHD1(-/-) neurons increased their redox buffering capacity to scavenge oxygen radicals in ischemia. Intracerebroventricular injection of PHD1-antisense oligonucleotides reduced the cerebral infarct size and neurological deficits following stroke. These data identify PHD1 as a regulator of neuronal metabolism and a potential therapeutic target in ischemic stroke.
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Affiliation(s)
- Annelies Quaegebeur
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium
| | - Inmaculada Segura
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium
| | - Roberta Schmieder
- Laboratory of Cellular Metabolism and Metabolic Regulation, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Cellular Metabolism and Metabolic Regulation, Vesalius Research Center, VIB, Leuven, Belgium
| | - Dries Verdegem
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium; Metabolomics Expertise Center, Vesalius Research Center, VIB, Leuven, Belgium
| | - Ilaria Decimo
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium
| | - Francesco Bifari
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium
| | - Tom Dresselaers
- Biomedical MRI/Mosaic, Department of Imaging and Pathology, University of Leuven, Leuven, Belgium
| | - Guy Eelen
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium
| | - Debapriva Ghosh
- Laboratory of Ion Channel Research and TRP channel research platform Leuven, Department of Cellular and Molecular Medicine, University of Leuven, Leuven, Belgium
| | - Shawn M Davidson
- Koch Institute for Integrative Cancer Research at Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Sandra Schoors
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium
| | - Dorien Broekaert
- Laboratory of Cellular Metabolism and Metabolic Regulation, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Cellular Metabolism and Metabolic Regulation, Vesalius Research Center, VIB, Leuven, Belgium
| | - Bert Cruys
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium
| | - Kristof Govaerts
- Biomedical MRI/Mosaic, Department of Imaging and Pathology, University of Leuven, Leuven, Belgium
| | - Carla De Legher
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium
| | - Ann Bouché
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium
| | - Luc Schoonjans
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium
| | - Matt S Ramer
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium; International Collaboration on Repair Discoveries, the University of British Columbia, Vancouver, Canada
| | - Gene Hung
- Isis Pharmaceuticals, Carlsbad, CA 92008, USA
| | - Goele Bossaert
- Leuven Statistics Research Centre (LStat), University of Leuven, Leuven, Belgium
| | - Don W Cleveland
- Ludwig Institute for Cancer Research, Department of Medicine and Neuroscience, University of California, San Diego, La Jolla, CA 92093, USA
| | - Uwe Himmelreich
- Biomedical MRI/Mosaic, Department of Imaging and Pathology, University of Leuven, Leuven, Belgium
| | - Thomas Voets
- Laboratory of Ion Channel Research and TRP channel research platform Leuven, Department of Cellular and Molecular Medicine, University of Leuven, Leuven, Belgium
| | - Robin Lemmens
- Laboratory of Neurobiology, Vesalius Research Center, VIB, Leuven, Belgium; Experimental Neurology (Department of Neurosciences) and Leuven Research Institute for Neuroscience and Disease (LIND), University of Leuven, Leuven, Belgium; Neurology, University Hospitals Leuven, Leuven, Belgium
| | | | - Wim Robberecht
- Laboratory of Neurobiology, Vesalius Research Center, VIB, Leuven, Belgium; Experimental Neurology (Department of Neurosciences) and Leuven Research Institute for Neuroscience and Disease (LIND), University of Leuven, Leuven, Belgium; Neurology, University Hospitals Leuven, Leuven, Belgium
| | - Katrien De Bock
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium
| | - Mieke Dewerchin
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium
| | - Bart Ghesquière
- Metabolomics Expertise Center, Vesalius Research Center, VIB, Leuven, Belgium
| | - Sarah-Maria Fendt
- Laboratory of Cellular Metabolism and Metabolic Regulation, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Cellular Metabolism and Metabolic Regulation, Vesalius Research Center, VIB, Leuven, Belgium
| | - Peter Carmeliet
- Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, University of Leuven, Leuven, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven, Belgium.
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Neural Stem Cells Rescue Cognitive and Motor Dysfunction in a Transgenic Model of Dementia with Lewy Bodies through a BDNF-Dependent Mechanism. Stem Cell Reports 2015; 5:791-804. [PMID: 26489892 PMCID: PMC4649255 DOI: 10.1016/j.stemcr.2015.09.008] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 09/09/2015] [Accepted: 09/10/2015] [Indexed: 01/24/2023] Open
Abstract
Accumulation of α-synuclein (α-syn) into insoluble aggregates occurs in several related disorders collectively referred to as synucleinopathies. To date, studies have used neural stem cells (NSCs) to examine questions about α-syn propagation, but have overlooked the therapeutic potential of NSC transplantation to modulate cognition in disorders such as dementia with Lewy bodies or Parkinson’s disease dementia. Here, we show that striatal transplantation of NSCs into aged α-syn transgenic mice significantly improves performance in multiple cognitive and motor domains. This recovery is associated with NSC expression of brain-derived neurotrophic factor (BDNF), which restores depleted levels and modulates dopaminergic and glutamatergic systems. Most importantly, transplantation of BDNF-depleted NSCs fails to improve behavior, whereas AAV-mediated BDNF delivery mimics the benefits of NSC transplantation, supporting a critical role for this neurotrophin in functional improvement. Thus, NSC transplantation could offer a promising approach to treat the understudied yet devastating cognitive components of many synucleinopathies. α-Synuclein mice exhibit significant DLB/PDD-associated cognitive and motor deficits Striatal NSC transplantation dramatically improves cognitive and motor function BDNF is necessary for NSC-mediated behavioral improvements NSC-BDNF promotes recovery by regulating dopaminergic and glutamatergic systems
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Rao G, Hedrick AF, Yadav VR, Xie J, Hussain A, Awasthi V. The brain metabolic activity after resuscitation with liposome-encapsulated hemoglobin in a rat model of hypovolemic shock. J Cereb Blood Flow Metab 2015; 35:1528-36. [PMID: 25944591 PMCID: PMC4640343 DOI: 10.1038/jcbfm.2015.82] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 03/24/2015] [Accepted: 03/31/2015] [Indexed: 01/15/2023]
Abstract
We examined the effect of resuscitation with liposome-encapsulated hemoglobin (LEH) on cerebral bioenergetics in a rat model of 45% hypovolemia. The rats were resuscitated with isovolemic LEH or saline after 15 minutes of shock and followed up to 6 hours. Untreated hypovolemic rats received no fluid. The cerebral uptake of F-18-fluorodeoxyglucose (FDG) was measured by PET, and at 6 hours, the brain was collected for various assays. Hypovolemia decreased cellular adenosine triphosphate (ATP), phosphocreatine, nicotinamide adenine dinucleotide (NAD)/NADH ratio, citrate synthase activity, glucose-6-phosphate, and nerve growth factor (NGF), even when FDG uptake remained unchanged. The FDG uptake was reduced by saline, but not by LEH infusion. The reduced FDG uptake in saline group was associated with a decrease in hexokinase I expression. The LEH infusion effectively restored ATP content, NAD/NADH ratio, and NGF expression, and reduced the hypovolemia-induced accumulation of pyruvate and ubiquitinated proteins; in comparison, saline was significantly less effective. The LEH infusion was associated with low pH and high anion gap, indicating anionic gap acidosis. The results suggest that hypovolemic shock perturbs glucose metabolism at the level of pyruvate utilization, resulting in deranged cerebral energy stores. The correction of volume and oxygen deficits by LEH recovers the cerebral metabolism and creates a prosurvival phenotype.
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Affiliation(s)
- Geeta Rao
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center, Oklahoma City, OK, USA
| | - Andria F Hedrick
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center, Oklahoma City, OK, USA
| | - Vivek R Yadav
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center, Oklahoma City, OK, USA
| | - Jun Xie
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center, Oklahoma City, OK, USA
| | - Alamdar Hussain
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center, Oklahoma City, OK, USA
| | - Vibhudutta Awasthi
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center, Oklahoma City, OK, USA
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Rao G, Xie J, Hedrick A, Awasthi V. Hemorrhagic shock-induced cerebral bioenergetic imbalance is corrected by pharmacologic treatment with EF24 in a rat model. Neuropharmacology 2015; 99:318-27. [PMID: 26232641 DOI: 10.1016/j.neuropharm.2015.07.033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2015] [Revised: 07/25/2015] [Accepted: 07/27/2015] [Indexed: 01/03/2023]
Abstract
Maintenance of cerebral viability and function is an important goal of critical care in victims of injury due to ischemia and hypovolemia. As part of the multiple organ dysfunction syndrome, the brain function after trauma is influenced by the systemic inflammatory response. We investigated the effect of EF24, an anti-inflammatory bis-chalcone, on cerebral bioenergetics in a rat model of 45% hemorrhagic shock. The rats were treated with EF24 (0.4 mg/kg) or EF24 with an artificial oxygen carrier liposome-encapsulated hemoglobin (LEH). The volume of LEH administered was equal to the shed blood. The brain was collected after 6 h of shock for biochemical assays. EF24 treatment showed significant recovery of ATP, phosphocreatine, and NAD/NADH ratio. It also increased citrate synthase activity and cytochrome c oxidase subunit IV expression which were reduced in shock brain. Furthermore, it reduced the shock-induced accumulation of pyruvate and pyruvate dehydrogenase kinase-1 expression, suggesting that EF24 treatment improves cerebral energetics by restoring perturbed pyruvate metabolism in the mitochondria. These effects of EF24 were associated with reduced poly(ADP-ribose) polymerase cleavage and a significant improvement in the levels of nerve growth factor and brain-derived neurotrophic factor in shock brain. Co-administration of LEH with EF24 was only marginally more effective as compared to the treatment with EF24 alone. These results show that EF24 treatment sets up a pro-survival phenotype in shock by resurrecting cerebral bioenergetics. Since EF24 was effective in the absence of accompanying fluid resuscitation, it has potential utility as a pre-hospital pharmacotherapy in shock due to accidental blood loss.
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Affiliation(s)
- Geeta Rao
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center, 1110 North Stonewall Avenue, Oklahoma City, OK 73117, USA
| | - Jun Xie
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center, 1110 North Stonewall Avenue, Oklahoma City, OK 73117, USA
| | - Andria Hedrick
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center, 1110 North Stonewall Avenue, Oklahoma City, OK 73117, USA
| | - Vibhudutta Awasthi
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center, 1110 North Stonewall Avenue, Oklahoma City, OK 73117, USA.
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Park JY, Park JJ, Jeon S, Doo AR, Kim SN, Lee H, Chae Y, Maixner W, Lee H, Park HJ. From peripheral to central: the role of ERK signaling pathway in acupuncture analgesia. THE JOURNAL OF PAIN 2014; 15:535-49. [PMID: 24524846 DOI: 10.1016/j.jpain.2014.01.498] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 01/23/2014] [Accepted: 01/29/2014] [Indexed: 01/04/2023]
Abstract
UNLABELLED Despite accumulating evidence of the clinical effectiveness of acupuncture, its mechanism remains largely unclear. We assume that molecular signaling around the acupuncture needled area is essential for initiating the effect of acupuncture. To determine possible bio-candidates involved in the mechanisms of acupuncture and investigate the role of such bio-candidates in the analgesic effects of acupuncture, we conducted 2 stepwise experiments. First, a genome-wide microarray of the isolated skin layer at the GB34-equivalent acupoint of C57BL/6 mice 1 hour after acupuncture found that a total of 236 genes had changed and that extracellular signal-regulated kinase (ERK) activation was the most prominent bio-candidate. Second, in mouse pain models using formalin and complete Freund adjuvant, we found that acupuncture attenuated the nociceptive behavior and the mechanical allodynia; these effects were blocked when ERK cascade was interrupted by the mitogen-activated protein kinase kinase (MEK)/mitogen-activated protein kinase (MAPK) inhibitor U0126 (.8 μg/μL). Based on these results, we suggest that ERK phosphorylation following acupuncture needling is a biochemical hallmark initiating the effect of acupuncture including analgesia. PERSPECTIVE This article presents the novel evidence of the local molecular signaling in acupuncture analgesia by demonstrating that ERK activation in the skin layer contributes to the analgesic effect of acupuncture in a mouse pain model. This work improves our understanding of the scientific basis underlying acupuncture analgesia.
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Affiliation(s)
- Ji-Yeun Park
- Studies of Translational Acupuncture Research, Acupuncture and Meridian Science Research Center, Kyung Hee University, Seoul, Republic of Korea; Department of Korean Medical Science, Graduate School of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Jongbae J Park
- Asian Medicine and Acupuncture Research, Department of Physical Medicine and Rehabilitation, Chapel Hill, North Carolina; Center for Pain Research and Innovation, UNC School of Dentistry, Chapel Hill, North Carolina
| | - Songhee Jeon
- Dongguk University Research Institute of Biotechnology, Seoul, Republic of Korea
| | - Ah-Reum Doo
- Studies of Translational Acupuncture Research, Acupuncture and Meridian Science Research Center, Kyung Hee University, Seoul, Republic of Korea
| | - Seung-Nam Kim
- Studies of Translational Acupuncture Research, Acupuncture and Meridian Science Research Center, Kyung Hee University, Seoul, Republic of Korea; Department of Korean Medical Science, Graduate School of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Hyangsook Lee
- Studies of Translational Acupuncture Research, Acupuncture and Meridian Science Research Center, Kyung Hee University, Seoul, Republic of Korea
| | - Younbyoung Chae
- Studies of Translational Acupuncture Research, Acupuncture and Meridian Science Research Center, Kyung Hee University, Seoul, Republic of Korea; Department of Korean Medical Science, Graduate School of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - William Maixner
- Center for Pain Research and Innovation, UNC School of Dentistry, Chapel Hill, North Carolina
| | - Hyejung Lee
- Studies of Translational Acupuncture Research, Acupuncture and Meridian Science Research Center, Kyung Hee University, Seoul, Republic of Korea; Department of Korean Medical Science, Graduate School of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Hi-Joon Park
- Studies of Translational Acupuncture Research, Acupuncture and Meridian Science Research Center, Kyung Hee University, Seoul, Republic of Korea; Carolina Asia Center, UNC-Chapel Hill, Chapel Hill, North Carolina.
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BDNF-based synaptic repair as a disease-modifying strategy for neurodegenerative diseases. Nat Rev Neurosci 2013; 14:401-16. [PMID: 23674053 DOI: 10.1038/nrn3505] [Citation(s) in RCA: 537] [Impact Index Per Article: 48.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Increasing evidence suggests that synaptic dysfunction is a key pathophysiological hallmark in neurodegenerative disorders, including Alzheimer's disease. Understanding the role of brain-derived neurotrophic factor (BDNF) in synaptic plasticity and synaptogenesis, the impact of the BDNF Val66Met polymorphism in Alzheimer's disease-relevant endophenotypes - including episodic memory and hippocampal volume - and the technological progress in measuring synaptic changes in humans all pave the way for a 'synaptic repair' therapy for neurodegenerative diseases that targets pathophysiology rather than pathogenesis. This article reviews the key issues in translating BDNF biology into synaptic repair therapies.
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