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Ovsepian SV, O'Leary VB, Hoschl C, Zaborszky L. Integrated phylogeny of the human brain and pathobiology of Alzheimer's disease: A unifying hypothesis. Neurosci Lett 2021; 755:135895. [PMID: 33862141 DOI: 10.1016/j.neulet.2021.135895] [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: 02/21/2021] [Revised: 04/05/2021] [Accepted: 04/09/2021] [Indexed: 02/08/2023]
Abstract
The disproportionate evolutionary expansion of the human cerebral cortex with reinforcement of cholinergic innervations warranted a major rise in the functional and metabolic load of the conserved basal forebrain (BF) cholinergic system. Given that acetylcholine (ACh) regulates properties of the microtubule-associated protein (MAP) tau and promotes non-amyloidogenic processing of amyloid precursor protein (APP), growing neocortex predicts higher demands for ACh, while the emerging role of BF cholinergic projections in Aβ clearance infers greater exposure of source neurons and their innervation fields to amyloid pathology. The higher exposure of evolutionary most recent cortical areas to the amyloid pathology of Alzheimer's disease (AD) with synaptic impairments and atrophy, therefore, might involve attenuated homeostatic effects of BF cholinergic projections, in addition to fall-outs of inherent processes of expanding association areas. This unifying model, thus, views amyloid pathology and loss of cholinergic cells as a quid pro quo of the allometric evolution of the human brain, which in combination with increase in life expectancy overwhelm the fine homeostatic balance and trigger the disease process.
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Affiliation(s)
- Saak V Ovsepian
- Department of Experimental Neurobiology, National Institute of Mental Health, Topolová 748, 250 67, Klecany, Czech Republic.
| | - Valerie B O'Leary
- Department of Medical Genetics, Third Faculty of Medicine, Charles University, Ruská 87, 100 00, Praha 10, Czech Republic
| | - Cyril Hoschl
- Department of Experimental Neurobiology, National Institute of Mental Health, Topolová 748, 250 67, Klecany, Czech Republic; Department of Psychiatry and Medical Psychology, Third Faculty of Medicine, Charles University, Ruská 87, 100 00, Prague 10, Czech Republic
| | - Laszlo Zaborszky
- Center for Molecular and Behavioral Neuroscience, Rutgers, the State University of New Jersey, Newark, NJ, USA
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Agostini JF, Santo GD, Baldin SL, Bernardo HT, de Farias ACS, Rico EP, Wanderley AG. Gallic Acid Reverses Neurochemical Changes Induced by Prolonged Ethanol Exposure in the Zebrafish Brain. Neuroscience 2020; 455:251-262. [PMID: 33285238 DOI: 10.1016/j.neuroscience.2020.11.040] [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: 07/16/2020] [Revised: 11/24/2020] [Accepted: 11/25/2020] [Indexed: 01/23/2023]
Abstract
Gallic acid (GA) is a polyphenolic compound that has attracted significant interest due to its antioxidant action through free radical elimination and metal chelation. Ethanol is a highly soluble psychoactive substance, and its toxicity is associated with oxidative stress. In this context, the purpose of the present study was to investigate the effect of GA on neurochemical changes in zebrafish brains exposed to ethanol. GA was first analyzed in isolation by treating the animals at concentrations of 5, 10, and 20 mg/L for 24 h and 48 h. The results revealed that the group exposed to 20 mg/L over a 24/48 h period exhibited increases in thiobarbituric acid reactive substance (TBA-RS) levels and 2',7'-dichlorofluorescein (DCFH) oxidation, demonstrating a pro-oxidant profile. Moreover, decrease in acetylcholinesterase (AChE) enzyme activity was observed. To investigate the effects of GA after ethanol exposure, the animals were divided into four groups: control; those exposed to 0.5% ethanol for 7 days; those exposed to 0.5% ethanol for 7 days and treated with GA at 5 and 10 mg/L on day 8. Treatment with GA at 5 and 10 mg/L reversed impairment of choline acetyltransferase activity and the damage to TBA-RS levels, DCFH oxidation, and superoxide dismutase activity induced by ethanol. Results of the present study suggest that GA treatment (20 mg/L) appeared to disrupt oxidative parameters in the zebrafish brain. GA treatment at 5 and 10 mg/L reversed alterations to the cholinergic system induced by prolonged exposure to ethanol in the zebrafish brain, probably through an antioxidant mechanism.
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Affiliation(s)
- Jotele Fontana Agostini
- Department of Pharmaceutical Sciences, Federal University of Pernambuco (UFPE), Recife, PE, Brazil
| | - Glaucia Dal Santo
- Department of Pharmaceutical Sciences, Federal University of Pernambuco (UFPE), Recife, PE, Brazil
| | - Samira Leila Baldin
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Extreme Southern Catarinense (UNESC), Criciúma, Santa Catarina, Brazil
| | - Henrique Teza Bernardo
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Extreme Southern Catarinense (UNESC), Criciúma, Santa Catarina, Brazil
| | - Ana Caroline Salvador de Farias
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Extreme Southern Catarinense (UNESC), Criciúma, Santa Catarina, Brazil
| | - Eduardo Pacheco Rico
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Extreme Southern Catarinense (UNESC), Criciúma, Santa Catarina, Brazil
| | - Almir Gonçalves Wanderley
- Department of Pharmaceutical Sciences, Federal University of Pernambuco (UFPE), Recife, PE, Brazil; Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife, PE, Brazil.
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O'Leary VB, O'Connell M, Antyborzec I, Ntziachristos V, Oliver Dolly J, Ovsepian SV. Alleviation of Trigeminal Nociception Using p75 Neurotrophin Receptor Targeted Lentiviral Interference Therapy. Neurotherapeutics 2018; 15:489-499. [PMID: 29427180 PMCID: PMC5935639 DOI: 10.1007/s13311-018-0608-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Acute and chronic trigeminal (TG) neuropathies are the cause of considerable distress, with limited treatments available at present. Nociceptive neurons enriched with the vanilloid type 1 receptor (VR1) partake in pain sensation and sensitization in the TG system. While VR1 blockers with anti-nociceptive potential are of substantial medical interest, their use remains limited due to poor selectivity and lack of cell-targeting capabilities. This study describes a methodology for the alleviation of nociception via targeted depletion of VR1 in TG sensory neurons in rats. In cultured TG ganglion neurons, VR1 expression was virtually abolished by lentiviral short hairpin RNA (LV-VR1). By decorating GFP encoding LV (LV-GFP) and LV-VR1 with IgG192 for targeting TG sensory neurons enriched with the p75 neurotrophin receptor (p75NTR), transduction of a reporter GFP and VR1 depletion was achieved after injection of targeted vectors into the whisker pad. In IgG192/LV-VR1-injected rats, the behavioral response to capsaicin exposure as well as Erk 1/2 phosphorylation and VR1 current activation by capsaicin were significantly reduced. This pioneering investigation, thus, provides a proof of principle for a means of attenuating TG nociception, revealing therapeutic potential.
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Affiliation(s)
- Valerie B O'Leary
- International Centre for Neurotherapeutics, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Marie O'Connell
- International Centre for Neurotherapeutics, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Inga Antyborzec
- International Centre for Neurotherapeutics, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Vasilis Ntziachristos
- Helmholtz Zentrum München - German Research Center for Environmental Health, Institute for Biological and Medical Imaging, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
- Faculty for Electrical Engineering and Information Technology, Chair of Biomedical Imaging, Technical University of Munich, Munich, Germany
| | - J Oliver Dolly
- International Centre for Neurotherapeutics, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Saak V Ovsepian
- International Centre for Neurotherapeutics, Dublin City University, Glasnevin, Dublin 9, Ireland.
- Helmholtz Zentrum München - German Research Center for Environmental Health, Institute for Biological and Medical Imaging, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany.
- Faculty for Electrical Engineering and Information Technology, Chair of Biomedical Imaging, Technical University of Munich, Munich, Germany.
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