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Dash UC, Swain SK, Jena AB, Dandapat J, Sahoo AK. The ameliorative effect of Piper trioicum in attenuating cognitive deficit in scopolamine induced neurotoxicity in experimental rats. JOURNAL OF ETHNOPHARMACOLOGY 2024; 318:116911. [PMID: 37451488 DOI: 10.1016/j.jep.2023.116911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 07/08/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE In traditional system of medicine, Piper species, or its components are widely used to treat many diseases including memory improvement. One of the wild species Piper trioicum Roxb. (Piperaceae) is found in South Asian countries. The whole plant is used as folk medicine to improve memory. AIM OF THE STUDY To our knowledge, no previous research has investigated the neuroprotective activities of P. trioicum. So, we studied the ameliorative effect of P. trioicum in attenuating cognitive deficit in scopolamine induced neurotoxicity in experimental rats. MATERIALS AND METHODS Wistar rats were exposed to scopolamine (3 mg/kg, i. p.) for 14 consecutive days, and the effect of P. trioicum (HAPT; oral, 300, 400 mg/kg) on scopolamine-invoked neurotoxicity in brain were studied. During the experimental period, behaviour analyses of rats were observed 30 min post-drug administration. The role of antioxidants of HAPT in scavenging cellular oxygen/peroxyl radicals were studied. Acetylcholinesterase and butyrylcholinesterase inhibitions, and mode of inhibition kinetics of HAPT were studied. Pathogenic cellular oxidative (MDA, GSH, SOD, and CAT), DNA damage (8-oxodG), neurochemical (acetyl- and, butyryl-cholinesterase), β-secretase (BACE-1 and 2), MAPτ, and neuroinflammation (IL-6, TNF-α) biomarkers in extension to the histopathological observation of brain cortex were studied. GC-MS/MS analysis was carried out to investigate the presence of bioactive constituents in HAPT. RESULTS HAPT, a rich source of phenol and flavonoid type antioxidants were responsible in quenching oxygen/peroxyl radicals and protected the cellular membrane, and lipoproteins against ROS in DPPH, ORAC, and CAPe tests. HAPT inhibited acetylcholinesterase and butyrylcholinesterase activities, and showed competitive-inhibition (reversible) towards cholinesterase activities. HAPT-400 significantly improved the learning and memory-impairment by restoring oxidative MDA, GSH, SOD, CAT, and DNA damage (8-oxodG) markers of serum, and cortex. It also improved acetyl- and, butyryl-cholinesterase, β-secretase, and MAPτ level in brain by restoring proinflammatory cytokines IL-6, and TNF-α indicators in neurotoxic rats. GC-MS/MS reported therapeutic significance active compounds were molecular-docked towards target proteins, found that proscillaridin showed the highest affinity towards AChE, BuChE, BACE1, and BACE2 with binding energy of ΔGb -9.1, ΔGb -10.2, ΔGb -11.4 and ΔGb -11.5 Kcal/mol, respectively. Cymarin and morphine-3-glucuronide showed the second highest binding affinity towards AChE (ΔGb -8.8) and BuChE (ΔGb -10.0), respectively. In BACE-1, betulin showed the second highest binding affinity ΔGb -10.7 Kcal/mol and in BACE-2, morphine-3-glucuronide showed the second highest binding affinity ΔGb -9.8 Kcal/mol. CONCLUSIONS Synergistic impact of proscillaridin, Cymarin, morphine-3-glucuronide, betulin like compounds in HAPT improved memory impairment, healing of tissue architecture of cortex with the restoration of neurochemical, neuroinflammation, and oxidative indicators in neurotoxic rats.
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Affiliation(s)
- Umesh Chandra Dash
- Regional Plant Resource Centre, Medicinal & Aromatic Plant Division, Forest & Environment Department, Govt. of Odisha, Nayapalli, Bhubaneswar, 751015, India
| | - Sandeep Kumar Swain
- Regional Plant Resource Centre, Medicinal & Aromatic Plant Division, Forest & Environment Department, Govt. of Odisha, Nayapalli, Bhubaneswar, 751015, India
| | - Atala Bihari Jena
- Department of Biotechnology, Utkal University, Vani Vihar, Bhubaneswar, 751004, India
| | - Jagneshwar Dandapat
- Department of Biotechnology, Utkal University, Vani Vihar, Bhubaneswar, 751004, India
| | - Atish Kumar Sahoo
- Regional Plant Resource Centre, Medicinal & Aromatic Plant Division, Forest & Environment Department, Govt. of Odisha, Nayapalli, Bhubaneswar, 751015, India.
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Kolmogorov VS, Erofeev AS, Barykin EP, Timoshenko RV, Lopatukhina EV, Kozin SA, Gorbacheva LR, Salikhov SV, Klyachko NL, Mitkevich VA, Edwards CRW, Korchev YE, Makarov AA, Gorelkin PV. Scanning Ion-Conductance Microscopy for Studying β-Amyloid Aggregate Formation on Living Cell Surfaces. Anal Chem 2023; 95:15943-15949. [PMID: 37856787 DOI: 10.1021/acs.analchem.3c02806] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
β-Amyloid aggregation on living cell surfaces is described as responsible for the neurotoxicity associated with different neurodegenerative diseases. It is suggested that the aggregation of β-amyloid (Aβ) peptide on neuronal cell surface leads to various deviations of its vital function due to myriad pathways defined by internalization of calcium ions, apoptosis promotion, reduction of membrane potential, synaptic activity loss, etc. These are associated with structural reorganizations and pathologies of the cell cytoskeleton mainly involving actin filaments and microtubules and consequently alterations of cell mechanical properties. The effect of amyloid oligomers on cells' Young's modulus has been observed in a variety of studies. However, the precise connection between the formation of amyloid aggregates on cell membranes and their effects on the local mechanical properties of living cells is still unresolved. In this work, we have used correlative scanning ion-conductance microscopy (SICM) to study cell topography, Young's modulus mapping, and confocal imaging of Aβ aggregate formation on living cell surfaces. However, it is well-known that the cytoskeleton state is highly connected to the intracellular level of reactive oxygen species (ROS). The effect of Aβ leads to the induction of oxidative stress, actin polymerization, and stress fiber formation. We measured the reactive oxygen species levels inside single cells using platinum nanoelectrodes to demonstrate the connection of ROS and Young's modulus of cells. SICM can be successfully applied to studying the cytotoxicity mechanisms of Aβ aggregates on living cell surfaces.
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Affiliation(s)
- Vasilii S Kolmogorov
- National University of Science and Technology "MISIS", 119049 Moscow, Russian Federation
- Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Alexander S Erofeev
- National University of Science and Technology "MISIS", 119049 Moscow, Russian Federation
| | - Evgeny P Barykin
- Engelhardt Institute of Molecular Biology of Russian Academy of Sciences, 119991 Moscow, Russian Federation
| | - Roman V Timoshenko
- National University of Science and Technology "MISIS", 119049 Moscow, Russian Federation
| | - Elena V Lopatukhina
- National University of Science and Technology "MISIS", 119049 Moscow, Russian Federation
| | - Sergey A Kozin
- Engelhardt Institute of Molecular Biology of Russian Academy of Sciences, 119991 Moscow, Russian Federation
| | - Lyubov R Gorbacheva
- Lomonosov Moscow State University, 119991 Moscow, Russian Federation
- Pirogov Russian National Research Medical University, 117997 Moscow, Russian Federation
| | - Sergey V Salikhov
- National University of Science and Technology "MISIS", 119049 Moscow, Russian Federation
| | | | - Vladimir A Mitkevich
- Engelhardt Institute of Molecular Biology of Russian Academy of Sciences, 119991 Moscow, Russian Federation
| | | | - Yuri E Korchev
- Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, 920-1192 Kanazawa, Japan
- Department of Medicine, Imperial College London, SW7 2AZ London, United Kingdom
| | - Alexander A Makarov
- Engelhardt Institute of Molecular Biology of Russian Academy of Sciences, 119991 Moscow, Russian Federation
| | - Petr V Gorelkin
- National University of Science and Technology "MISIS", 119049 Moscow, Russian Federation
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3
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Vieira TCRG, Barros CA, Domingues R, Outeiro TF. PrP meets alpha-synuclein: Molecular mechanisms and implications for disease. J Neurochem 2023. [PMID: 37855859 DOI: 10.1111/jnc.15992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/19/2023] [Accepted: 10/01/2023] [Indexed: 10/20/2023]
Abstract
The discovery of prions has challenged dogmas and has revolutionized our understanding of protein-misfolding diseases. The concept of self-propagation via protein conformational changes, originally discovered for the prion protein (PrP), also applies to other proteins that exhibit similar behavior, such as alpha-synuclein (aSyn), a central player in Parkinson's disease and in other synucleinopathies. aSyn pathology appears to spread from one cell to another during disease progression, and involves the misfolding and aggregation of aSyn. How the transfer of aSyn between cells occurs is still being studied, but one important hypothesis involves receptor-mediated transport. Interestingly, recent studies indicate that the cellular prion protein (PrPC ) may play a crucial role in this process. PrPC has been shown to act as a receptor/sensor for protein aggregates in different neurodegenerative disorders, including Alzheimer's disease and amyotrophic lateral sclerosis. Here, we provide a comprehensive overview of the current state of knowledge regarding the interaction between aSyn and PrPC and discuss its role in synucleinopathies. We examine the properties of PrP and aSyn, including their structure, function, and aggregation. Additionally, we discuss the current understanding of PrPC 's role as a receptor/sensor for aSyn aggregates and identify remaining unanswered questions in this area of research. Ultimately, we posit that exploring the interaction between aSyn and PrPC may offer potential treatment options for synucleinopathies.
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Affiliation(s)
- Tuane C R G Vieira
- Institute of Medical Biochemistry Leopoldo de Meis and National Institute of Science and Technology for Structural Biology and Bioimaging, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Caroline A Barros
- Institute of Medical Biochemistry Leopoldo de Meis and National Institute of Science and Technology for Structural Biology and Bioimaging, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Renato Domingues
- Department of Experimental Neurodegeneration, Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
| | - Tiago Fleming Outeiro
- Department of Experimental Neurodegeneration, Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
- Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Faculty of Medical Sciences, Translational and Clinical Research Institute, Newcastle University, Newcastle Upon Tyne, UK
- Scientific Employee with an Honorary Contract at Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), Göttingen, Germany
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Chernyaeva L, Ratti G, Teirilä L, Fudo S, Rankka U, Pelkonen A, Korhonen P, Leskinen K, Keskitalo S, Salokas K, Gkolfinopoulou C, Crompton KE, Javanainen M, Happonen L, Varjosalo M, Malm T, Leinonen V, Chroni A, Saavalainen P, Meri S, Kajander T, Wollman AJ, Nissilä E, Haapasalo K. Reduced binding of apoE4 to complement factor H promotes amyloid-β oligomerization and neuroinflammation. EMBO Rep 2023:e56467. [PMID: 37155564 DOI: 10.15252/embr.202256467] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 04/08/2023] [Accepted: 04/24/2023] [Indexed: 05/10/2023] Open
Abstract
The APOE4 variant of apolipoprotein E (apoE) is the most prevalent genetic risk allele associated with late-onset Alzheimer's disease (AD). ApoE interacts with complement regulator factor H (FH), but the role of this interaction in AD pathogenesis is unknown. Here we elucidate the mechanism by which isoform-specific binding of apoE to FH alters Aβ1-42-mediated neurotoxicity and clearance. Flow cytometry and transcriptomic analysis reveal that apoE and FH reduce binding of Aβ1-42 to complement receptor 3 (CR3) and subsequent phagocytosis by microglia which alters expression of genes involved in AD. Moreover, FH forms complement-resistant oligomers with apoE/Aβ1-42 complexes and the formation of these complexes is isoform specific with apoE2 and apoE3 showing higher affinity to FH than apoE4. These FH/apoE complexes reduce Aβ1-42 oligomerization and toxicity, and colocalize with complement activator C1q deposited on Aβ plaques in the brain. These findings provide an important mechanistic insight into AD pathogenesis and explain how the strongest genetic risk factor for AD predisposes for neuroinflammation in the early stages of the disease pathology.
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Affiliation(s)
- Larisa Chernyaeva
- Department of Bacteriology and Immunology, Medicum and Human Microbiome Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | | | - Laura Teirilä
- Department of Bacteriology and Immunology, Medicum and Human Microbiome Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Satoshi Fudo
- Department of Bacteriology and Immunology, Medicum and Human Microbiome Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Uni Rankka
- Department of Bacteriology and Immunology, Medicum and Human Microbiome Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Anssi Pelkonen
- A.I. Virtanen Institute for Molecular Sciences, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Paula Korhonen
- A.I. Virtanen Institute for Molecular Sciences, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Katarzyna Leskinen
- Department of Bacteriology and Immunology, Medicum and Human Microbiome Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Salla Keskitalo
- Institute of Biotechnology, HiLIFE Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
| | - Kari Salokas
- Institute of Biotechnology, HiLIFE Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
| | - Christina Gkolfinopoulou
- Institute of Biosciences and Applications, National Center for Scientific Research "Demokritos", Athens, Greece
| | | | - Matti Javanainen
- Institute of Biotechnology, HiLIFE Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
| | - Lotta Happonen
- Division of Infection Medicine, Department of Clinical Sciences, Lund University, Lund, Sweden
| | - Markku Varjosalo
- Institute of Biotechnology, HiLIFE Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
| | - Tarja Malm
- A.I. Virtanen Institute for Molecular Sciences, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Ville Leinonen
- Institute of Clinical Medicine - Neurosurgery, University of Eastern Finland and Department of Neurosurgery, Kuopio University Hospital, Kuopio, Finland
| | - Angeliki Chroni
- Institute of Biosciences and Applications, National Center for Scientific Research "Demokritos", Athens, Greece
| | - Päivi Saavalainen
- Department of Bacteriology and Immunology, Medicum and Human Microbiome Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Seppo Meri
- Department of Bacteriology and Immunology, Medicum and Human Microbiome Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
- Humanitas University, Milano, Italy
| | - Tommi Kajander
- Institute of Biotechnology, HiLIFE Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
| | - Adam Jm Wollman
- Biosciences Institute, Newcastle University, Newcastle-Upon-Tyne, UK
| | - Eija Nissilä
- Department of Bacteriology and Immunology, Medicum and Human Microbiome Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Karita Haapasalo
- Department of Bacteriology and Immunology, Medicum and Human Microbiome Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
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5
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Petrushanko IY, Mitkevich VA, Makarov AA. Effect of β-amyloid on blood-brain barrier properties and function. Biophys Rev 2023; 15:183-197. [PMID: 37124923 PMCID: PMC10133432 DOI: 10.1007/s12551-023-01052-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 03/13/2023] [Indexed: 05/02/2023] Open
Abstract
The deposition of beta-amyloid (Aβ) aggregates in the brain, accompanied by impaired cognitive function, is a characteristic feature of Alzheimer's disease (AD). An important role in this process is played by vascular disorders, in particular, a disturbance of the blood-brain barrier (BBB). The BBB controls the entry of Aβ from plasma to the brain via the receptor for advanced glycation end products (RAGE) and the removal of brain-derived Aβ via the low-density lipoprotein receptor-related protein (LRP1). The balance between the input of Aβ to the brain from the periphery and its output is disturbed during AD. Aβ changes the redox-status of BBB cells, which in turn changes the functioning of mitochondria and disrupts the barrier function of endothelial cells by affecting tight junction proteins. Aβ oligomers have the greatest toxic effect on BBB cells, and oligomers are most rapidly transferred by transcytosis from the brain side of the BBB to the blood side. Both the cytotoxic effect of Aβ and the impairment of barrier function are partly due to the interaction of Aβ monomers and oligomers with membrane-bound RAGE. AD therapies based on the disruption of this interaction or the creation of decoys for Aβ are being developed. The question of the transfer of various Aβ isoforms through the BBB is important, since it can influence the development of AD. It is shown that the rate of input of Aβ40 and Aβ42 from the blood into the brain is different. The actual question of the transfer of pathogenic Aβ isoforms with post-translational modifications or mutations through the BBB still remains open.
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Affiliation(s)
- Irina Yu. Petrushanko
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Vladimir A. Mitkevich
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Alexander A. Makarov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
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6
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Zhang W, Hu J, Liu R, Dai J, Yuan L, Liu Y, Chen B, Gong M, Xia F, Lou X. A Peptide-Conjugated Probe with Cleavage-Induced Morphological Change for Treatment on Tumor Cell Membrane. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2207228. [PMID: 36793151 PMCID: PMC10104630 DOI: 10.1002/advs.202207228] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 02/01/2023] [Indexed: 06/18/2023]
Abstract
Despite the promising advancements of in situ forming nanoassembly for the inhibition of tumor growth and metastasis, the lack of sufficient triggering sites and hardly controlling the forming position restrict their further developments. Herein, a smart transformable peptide-conjugated probe (DMFA) with enzyme cleavage-induced morphological change is designed for treatment on the tumor cell membrane. Specifically, after self-assembling into nanoparticles and anchoring on the cell membrane with sufficient interaction sites rapidly and stably, DMFA will be efficiently cleaved into α-helix forming part (DP) and β-sheet forming part (LFA) by overexpressed matrix metalloproteinase-2. Thus, the promoted Ca2+ influx by DP-induced cell membrane breakage and decreased Na+ /K+ -ATPase activity by LFA-assembled nanofibers wrapping the cells can inhibit PI3K-Akt signaling pathway, leading to the inhibition of tumor cell growth and metastasis. This peptide-conjugated probe undergoes in situ morphological transformation on the cell membrane, exhibiting great potential in tumor therapy.
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Affiliation(s)
- Wei Zhang
- State Key Laboratory of Biogeology and Environmental GeologyEngineering Research Center of Nano‐Geomaterials of Ministry of EducationFaculty of Materials Science and ChemistryChina University of GeosciencesWuhan430074China
| | - Jing‐Jing Hu
- State Key Laboratory of Biogeology and Environmental GeologyEngineering Research Center of Nano‐Geomaterials of Ministry of EducationFaculty of Materials Science and ChemistryChina University of GeosciencesWuhan430074China
| | - Rui Liu
- State Key Laboratory of Biogeology and Environmental GeologyEngineering Research Center of Nano‐Geomaterials of Ministry of EducationFaculty of Materials Science and ChemistryChina University of GeosciencesWuhan430074China
| | - Jun Dai
- Department of Obstetrics and GynecologyTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China
| | - Lizhen Yuan
- State Key Laboratory of Biogeology and Environmental GeologyEngineering Research Center of Nano‐Geomaterials of Ministry of EducationFaculty of Materials Science and ChemistryChina University of GeosciencesWuhan430074China
| | - Yiheng Liu
- State Key Laboratory of Biogeology and Environmental GeologyEngineering Research Center of Nano‐Geomaterials of Ministry of EducationFaculty of Materials Science and ChemistryChina University of GeosciencesWuhan430074China
| | - Bochao Chen
- State Key Laboratory of Biogeology and Environmental GeologyEngineering Research Center of Nano‐Geomaterials of Ministry of EducationFaculty of Materials Science and ChemistryChina University of GeosciencesWuhan430074China
| | - Mingxing Gong
- State Key Laboratory of Biogeology and Environmental GeologyEngineering Research Center of Nano‐Geomaterials of Ministry of EducationFaculty of Materials Science and ChemistryChina University of GeosciencesWuhan430074China
| | - Fan Xia
- State Key Laboratory of Biogeology and Environmental GeologyEngineering Research Center of Nano‐Geomaterials of Ministry of EducationFaculty of Materials Science and ChemistryChina University of GeosciencesWuhan430074China
| | - Xiaoding Lou
- State Key Laboratory of Biogeology and Environmental GeologyEngineering Research Center of Nano‐Geomaterials of Ministry of EducationFaculty of Materials Science and ChemistryChina University of GeosciencesWuhan430074China
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Phosphorylation and Dephosphorylation of Beta-Amyloid Peptide in Model Cell Cultures: The Role of Cellular Protein Kinases and Phosphatases. LIFE (BASEL, SWITZERLAND) 2023; 13:life13010147. [PMID: 36676097 PMCID: PMC9863727 DOI: 10.3390/life13010147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 12/24/2022] [Accepted: 12/28/2022] [Indexed: 01/06/2023]
Abstract
Phosphorylation of beta-amyloid peptide (Aβ) at the Ser8 residue affects its neurotoxicity, metal-dependent oligomerisation, amyloidogenicity, and other pathogenic properties. Phosphorylated Aβ (pS8-Aβ) was detected in vivo in AD model mice and in the brains of patients with AD. However, the pS8-Aβ production and the regulation of its levels have not been previously studied in detail. In this paper, immunochemical methods together with radioactive labelling were used to study the Aβ phosphorylation by intracellular and surface protein kinases of HEK293 cells and brain endothelial cells (bEnd.3). It was found that HEK293 robustly phosphorylated Aβ, likely with contribution from casein kinase 2 (CK2), whereas in bEnd.3, the activity of Aβ phosphorylation was relatively low. Further, the study showed that both HEK293 and bEnd.3 could dephosphorylate pS8-Aβ, mainly due to the activity of protein phosphatases PP1 and PP2A. The Aβ dephosphorylation efficiency in bEnd.3 was three times higher than in HEK293, which correlated with the reduced abundance of pS8-Aβ in vascular amyloid deposits of patients with AD compared to senile plaques. These data suggest an important role of CK2, PP1, and PP2A as regulators of Aβ phosphorylation, and point to the involvement of the blood-brain barrier in the control of Aβ modification levels.
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Petrovskaya AV, Tverskoi AM, Barykin EP, Varshavskaya KB, Dalina AA, Mitkevich VA, Makarov AA, Petrushanko IY. Distinct Effects of Beta-Amyloid, Its Isomerized and Phosphorylated Forms on the Redox Status and Mitochondrial Functioning of the Blood-Brain Barrier Endothelium. Int J Mol Sci 2022; 24:ijms24010183. [PMID: 36613623 PMCID: PMC9820675 DOI: 10.3390/ijms24010183] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 12/14/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
The Alzheimer's disease (AD)-associated breakdown of the blood-brain barrier (BBB) promotes the accumulation of beta-amyloid peptide (Aβ) in the brain as the BBB cells provide Aβ transport from the brain parenchyma to the blood, and vice versa. The breakdown of the BBB during AD may be caused by the emergence of blood-borne Aβ pathogenic forms, such as structurally and chemically modified Aβ species; their effect on the BBB cells has not yet been studied. Here, we report that the effects of Aβ42, Aβ42, containing isomerized Asp7 residue (iso-Aβ42) or phosphorylated Ser8 residue (p-Aβ42) on the mitochondrial potential and respiration are closely related to the redox status changes in the mouse brain endothelial cells bEnd.3. Aβ42 and iso-Aβ42 cause a significant increase in nitric oxide, reactive oxygen species, glutathione, cytosolic calcium and the mitochondrial potential after 4 h of incubation. P-Aβ42 either does not affect or its effect develops after 24 h of incubation. Aβ42 and iso-Aβ42 activate mitochondrial respiration compared to p-Aβ42. The isomerized form promotes a greater cytotoxicity and mitochondrial dysfunction, causing maximum oxidative stress. Thus, Aβ42, p-Aβ42 and iso-Aβ42 isoforms differently affect the BBBs' cell redox parameters, significantly modulating the functioning of the mitochondria. The changes in the level of modified Aβ forms can contribute to the BBBs' breakdown during AD.
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Zhang X, Lee W, Bian JS. Recent Advances in the Study of Na +/K +-ATPase in Neurodegenerative Diseases. Cells 2022; 11:cells11244075. [PMID: 36552839 PMCID: PMC9777075 DOI: 10.3390/cells11244075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 12/11/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Na+/K+-ATPase (NKA), a large transmembrane protein, is expressed in the plasma membrane of most eukaryotic cells. It maintains resting membrane potential, cell volume and secondary transcellular transport of other ions and neurotransmitters. NKA consumes about half of the ATP molecules in the brain, which makes NKA highly sensitive to energy deficiency. Neurodegenerative diseases (NDDs) are a group of diseases characterized by chronic, progressive and irreversible neuronal loss in specific brain areas. The pathogenesis of NDDs is sophisticated, involving protein misfolding and aggregation, mitochondrial dysfunction and oxidative stress. The protective effect of NKA against NDDs has been emerging gradually in the past few decades. Hence, understanding the role of NKA in NDDs is critical for elucidating the underlying pathophysiology of NDDs and identifying new therapeutic targets. The present review focuses on the recent progress involving different aspects of NKA in cellular homeostasis to present in-depth understanding of this unique protein. Moreover, the essential roles of NKA in NDDs are discussed to provide a platform and bright future for the improvement of clinical research in NDDs.
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Affiliation(s)
- Xiaoyan Zhang
- Department of Pharmacology, School of Medicine, Southern University of Science and Technology, Shenzhen 518055, China
| | - Weithye Lee
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore
| | - Jin-Song Bian
- Department of Pharmacology, School of Medicine, Southern University of Science and Technology, Shenzhen 518055, China
- Correspondence:
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Na,K-ATPase Acts as a Beta-Amyloid Receptor Triggering Src Kinase Activation. Cells 2022; 11:cells11172753. [PMID: 36078160 PMCID: PMC9455167 DOI: 10.3390/cells11172753] [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: 08/03/2022] [Revised: 08/29/2022] [Accepted: 09/01/2022] [Indexed: 11/17/2022] Open
Abstract
Beta-amyloid (Aβ) has a dual role, both as an important factor in the pathology of Alzheimer's disease and as a regulator in brain physiology. The inhibitory effect of Aβ42 oligomers on Na,K-ATPase contributes to neuronal dysfunction in Alzheimer's disease. Still, the physiological role of the monomeric form of Aβ42 interaction with Na,K-ATPase remains unclear. We report that Na,K-ATPase serves as a receptor for Aβ42 monomer, triggering Src kinase activation. The co-localization of Aβ42 with α1- and β1-subunits of Na,K-ATPase, and Na,K-ATPase with Src kinase in SH-SY5Y neuroblastoma cells, was observed. Treatment of cells with 100 nM Aβ42 causes Src kinase activation, but does not alter Na,K-ATPase transport activity. The interaction of Aβ42 with α1β1 Na,K-ATPase isozyme leads to activation of Src kinase associated with the enzyme. Notably, prevention of Na,K-ATPase:Src kinase interaction by a specific inhibitor pNaKtide disrupts the Aβ-induced Src kinase activation. Stimulatory effect of Aβ42 on Src kinase was lost under hypoxic conditions, which was similar to the effect of specific Na,K-ATPase ligands, the cardiotonic steroids. Our findings identify Na,K-ATPase as a Aβ42 receptor, thus opening a prospect on exploring the physiological and pathological Src kinase activation caused by Aβ42 in the nervous system.
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11
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Adzhubei AA, Tolstova AP, Strelkova MA, Mitkevich VA, Petrushanko IY, Makarov AA. Interaction Interface of Aβ 42 with Human Na,K-ATPase Studied by MD and ITC and Inhibitor Screening by MD. Biomedicines 2022; 10:biomedicines10071663. [PMID: 35884966 PMCID: PMC9313104 DOI: 10.3390/biomedicines10071663] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/05/2022] [Accepted: 07/05/2022] [Indexed: 12/14/2022] Open
Abstract
Alzheimer’s disease (AD) is a neurodegenerative disease accompanied by progressive cognitive and memory dysfunction due to disruption of normal electrotonic properties of neurons and neuronal loss. The Na,K-ATPase interaction with beta amyloid (Aβ) plays an important role in AD pathogenesis. It has been shown that Na,K-ATPase activity in the AD brain was significantly lower than those in age-matched control brain. The interaction of Aβ42 with Na,K-ATPase and subsequent oligomerization leads to inhibition of the enzyme activity. In this study interaction interfaces between three common Aβ42 isoforms, and different conformations of human Na,K-ATPase (α1β1) have been obtained using molecular modeling, including docking and molecular dynamics (MD). Interaction sites of Na,K-ATPase with Aβ42 are localized between extracellular parts of α- and β- subunits and are practically identical for Na,K-ATPase at different conformations. Thermodynamic parameters for the formation of Na,K-ATPase:Aβ42 complex at different conformations acquired by isothermal titration calorimetry (ITC) are similar, which is in line with the data of molecular modeling. Similarity of Na,K-ATPase interaction interfaces with Aβ in all conformations allowed us to cross-screen potential inhibitors for this interaction and find pharmaceutical compounds that could block it.
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Affiliation(s)
| | - Anna P. Tolstova
- Correspondence: (A.P.T.); (A.A.M.); Tel.: +7-499-135-4095 (A.A.M.)
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12
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Extracellular alpha-synuclein: Sensors, receptors, and responses. Neurobiol Dis 2022; 168:105696. [DOI: 10.1016/j.nbd.2022.105696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 02/28/2022] [Accepted: 03/15/2022] [Indexed: 11/19/2022] Open
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13
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Takasu K, Niidome K, Hasegawa M, Ogawa K. Histone Deacetylase Inhibitor Improves the Dysfunction of Hippocampal Gamma Oscillations and Fast Spiking Interneurons in Alzheimer's Disease Model Mice. Front Mol Neurosci 2022; 14:782206. [PMID: 35027883 PMCID: PMC8751405 DOI: 10.3389/fnmol.2021.782206] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 11/01/2021] [Indexed: 12/05/2022] Open
Abstract
The hippocampal gamma oscillation is important for cognitive function, and its deficit is related to cognitive impairment in Alzheimer’s disease (AD). Recently, it has been recognized that post-translational modification via histone acetylation is a fundamental molecular mechanism for regulating synaptic plasticity and cognitive function. However, little is known regarding the regulation of hippocampal gamma oscillation by histone acetylation. We investigated whether histone acetylation regulated kainate-induced gamma oscillations and their important regulator, fast-spiking interneurons, using acute hippocampal slices of AD model mice (PSAPP transgenic mice). We found a decrease in kainate-induced gamma oscillations in slices from PSAPP mice, accompanied with the increased activity of fast spiking interneurons in basal state and the decreased activity in activated state. The histone deacetylase (HDAC) inhibitor (SAHA, named vorinostat) restored deficits of gamma oscillation in PSAPP mice, accompanied with rescue of activity of fast spiking interneurons in basal and activated state. The effect of SAHA was different from that of the clinical AD drug donepezil, which rescued only function of fast spiking interneurons in basal state. Besides, activator of nuclear receptor family 4a (NR4a) receptor (cytosporone B), as one of the epigenetic modification related to HDAC inhibition, rescued the deficits in gamma oscillations in PSAPP mice. These results suggested a novel mechanism in which HDAC inhibition improved impairment of gamma oscillations in PSAPP mice by restoring the activity of fast spiking interneurons both in basal and activated state. The reversal of gamma oscillation deficits by HDAC inhibition and/or NR4a activation appears to be a potential therapeutic target for treating cognitive impairment in AD patients.
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Affiliation(s)
- Keiko Takasu
- Pain and Neuroscience, Drug Discovery and Disease Research Laboratory, Shionogi & Co., Ltd., Osaka, Japan
| | - Kazuki Niidome
- Pain and Neuroscience, Drug Discovery and Disease Research Laboratory, Shionogi & Co., Ltd., Osaka, Japan
| | - Minoru Hasegawa
- Pain and Neuroscience, Drug Discovery and Disease Research Laboratory, Shionogi & Co., Ltd., Osaka, Japan
| | - Koichi Ogawa
- Pain and Neuroscience, Drug Discovery and Disease Research Laboratory, Shionogi & Co., Ltd., Osaka, Japan
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14
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Haeger A, Bottlaender M, Lagarde J, Porciuncula Baptista R, Rabrait-Lerman C, Luecken V, Schulz JB, Vignaud A, Sarazin M, Reetz K, Romanzetti S, Boumezbeur F. What can 7T sodium MRI tell us about cellular energy depletion and neurotransmission in Alzheimer's disease? Alzheimers Dement 2021; 17:1843-1854. [PMID: 34855281 DOI: 10.1002/alz.12501] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 08/09/2021] [Accepted: 09/22/2021] [Indexed: 12/20/2022]
Abstract
The pathophysiological processes underlying the development and progression of Alzheimer's disease (AD) on the neuronal level are still unclear. Previous research has hinted at metabolic energy deficits and altered sodium homeostasis with impaired neuronal function as a potential metabolic marker relevant for neurotransmission in AD. Using sodium (23 Na) magnetic resonance (MR) imaging on an ultra-high-field 7 Tesla MR scanner, we found increased cerebral tissue sodium concentration (TSC) in 17 biomarker-defined AD patients compared to 22 age-matched control subjects in vivo. TSC was highly discriminative between controls and early AD stages and was predictive for cognitive state, and associated with regional tau load assessed with flortaucipir-positron emission tomography as a possible mediator of TSC-associated neurodegeneration. TSC could therefore serve as a non-invasive, stage-dependent, metabolic imaging marker. Setting a focus on cellular metabolism and potentially disturbed interneuronal communication due to energy-dependent altered cell homeostasis could hamper progressive cognitive decline by targeting these processes in future interventions.
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Affiliation(s)
- Alexa Haeger
- NeuroSpin, CEA, CNRS, Paris-Saclay University, Gif-sur-Yvette, France.,Department of Neurology, RWTH Aachen University, Aachen, Germany.,JARA-BRAIN Institute Molecular Neuroscience and Neuroimaging, Forschungszentrum Jülich GmbH and RWTH Aachen University, Aachen, Germany
| | - Michel Bottlaender
- NeuroSpin, CEA, CNRS, Paris-Saclay University, Gif-sur-Yvette, France.,Paris-Saclay University, CEA, CNRS, Inserm, BioMaps, Service Hospitalier Frédéric Joliot, Orsay, France
| | - Julien Lagarde
- Paris-Saclay University, CEA, CNRS, Inserm, BioMaps, Service Hospitalier Frédéric Joliot, Orsay, France.,Neurology of Memory and Language, GHU Paris Psychiatrie & Neurosciences, Sainte-Anne Hospital, Paris, France.,Université de Paris, Paris, France
| | | | | | - Volker Luecken
- NeuroSpin, CEA, CNRS, Paris-Saclay University, Gif-sur-Yvette, France
| | - Jörg B Schulz
- Department of Neurology, RWTH Aachen University, Aachen, Germany.,JARA-BRAIN Institute Molecular Neuroscience and Neuroimaging, Forschungszentrum Jülich GmbH and RWTH Aachen University, Aachen, Germany
| | - Alexandre Vignaud
- NeuroSpin, CEA, CNRS, Paris-Saclay University, Gif-sur-Yvette, France
| | - Marie Sarazin
- Paris-Saclay University, CEA, CNRS, Inserm, BioMaps, Service Hospitalier Frédéric Joliot, Orsay, France.,Neurology of Memory and Language, GHU Paris Psychiatrie & Neurosciences, Sainte-Anne Hospital, Paris, France.,Université de Paris, Paris, France
| | - Kathrin Reetz
- Department of Neurology, RWTH Aachen University, Aachen, Germany.,JARA-BRAIN Institute Molecular Neuroscience and Neuroimaging, Forschungszentrum Jülich GmbH and RWTH Aachen University, Aachen, Germany
| | - Sandro Romanzetti
- Department of Neurology, RWTH Aachen University, Aachen, Germany.,JARA-BRAIN Institute Molecular Neuroscience and Neuroimaging, Forschungszentrum Jülich GmbH and RWTH Aachen University, Aachen, Germany
| | - Fawzi Boumezbeur
- NeuroSpin, CEA, CNRS, Paris-Saclay University, Gif-sur-Yvette, France
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15
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Biophysical Reviews' "Meet the Councilor"-a profile of Anastasia A. Anashkina. Biophys Rev 2021; 13:817-820. [PMID: 34786027 PMCID: PMC8587497 DOI: 10.1007/s12551-021-00873-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 10/26/2021] [Indexed: 12/29/2022] Open
Abstract
As one of the twelve Councilors of the International Union of Pure and Applied Biophysics elected in summer 2021, I have been asked to provide this short biographical sketch for the journal readers. I am a new member of the IUPAB Council. I hold a specialist degree in Applied Physics and Mathematics from the Moscow Institute of Physics and Technology and PhD in Biophysics from Moscow State University. I have spent my entire professional career at Engelhardt Institute of Molecular Biology of the Russian Academy of Sciences in Moscow, where I am currently a senior researcher. I am Associate Professor at the Digital Health Institute of the I.M. Sechenov First Moscow State Medical University since 2018, and have trained undergraduate students in structural biology, biophysics, and bioinformatics. In addition, I serve as the Guest Editor of special journal issues of International Journal of Molecular Sciences and Frontiers in Genetics BMC genomics. Now I joined Biophysical Reviews Editorial Board as IUPAB Councilor. I am a Secretary of National Committee of Russian Biophysicists, and have helped to organize scientific conferences and workshops, such as the VI Congress of Russian Biophysicists.
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16
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Ahmad W, Ebert PR. Suppression of a core metabolic enzyme dihydrolipoamide dehydrogenase ( dld) protects against amyloid beta toxicity in C. elegans model of Alzheimer's disease. Genes Dis 2021; 8:849-866. [PMID: 34522713 PMCID: PMC8427249 DOI: 10.1016/j.gendis.2020.08.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 07/24/2020] [Accepted: 08/14/2020] [Indexed: 01/24/2023] Open
Abstract
A decrease in energy metabolism is associated with Alzheimer's disease (AD), but it is not known whether the observed decrease exacerbates or protects against the disease. The importance of energy metabolism in AD is reinforced by the observation that variants of dihydrolipoamide dehydrogenase (DLD), is genetically linked to late-onset AD. To determine whether DLD is a suitable therapeutic target, we suppressed the dld-1 gene in Caenorhabditis elegans that express human Aβ peptide in either muscles or neurons. Suppression of the dld-1 gene resulted in significant restoration of vitality and function that had been degraded by Aβ pathology. This included protection of neurons and muscles cells. The observed decrease in proteotoxicity was associated with a decrease in the formation of toxic oligomers rather than a decrease in the abundance of the Aβ peptide. The mitochondrial uncoupler, carbonyl cyanide 4-(trifluoromethoxy) phenylhydrazone (FCCP), which like dld-1 gene expression inhibits ATP synthesis, had no significant effect on Aβ toxicity. Proteomics data analysis revealed that beneficial effects after dld-1 suppression could be due to change in energy metabolism and activation of the pathways associated with proteasomal degradation, improved cell signaling and longevity. Thus, some features unique to dld-1 gene suppression are responsible for the therapeutic benefit. By direct genetic intervention, we have shown that acute inhibition of dld-1 gene function may be therapeutically beneficial. This result supports the hypothesis that lowering energy metabolism protects against Aβ pathogenicity and that DLD warrants further investigation as a therapeutic target.
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Affiliation(s)
- Waqar Ahmad
- School of Biological Sciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Paul R. Ebert
- School of Biological Sciences, The University of Queensland, Brisbane, QLD 4072, Australia
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17
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Garbuz DG, Zatsepina OG, Evgen’ev MB. Beta Amyloid, Tau Protein, and Neuroinflammation: An Attempt to Integrate Different Hypotheses of Alzheimer’s Disease Pathogenesis. Mol Biol 2021. [DOI: 10.1134/s002689332104004x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Abstract
Alzheimer’s disease (AD) is a neurodegenerative disease that inevitably results in dementia and death. Currently, there are no pathogenetically grounded methods for the prevention and treatment of AD, and all current treatment regimens are symptomatic and unable to significantly delay the development of dementia. The accumulation of β-amyloid peptide (Aβ), which is a spontaneous, aggregation-prone, and neurotoxic product of the processing of signaling protein APP (Amyloid Precursor Protein), in brain tissues, primarily in the hippocampus and the frontal cortex, was for a long time considered the main cause of neurodegenerative changes in AD. However, attempts to treat AD based on decreasing Aβ production and aggregation did not bring significant clinical results. More and more arguments are arising in favor of the fact that the overproduction of Aβ in most cases of AD is not the initial cause, but a concomitant event of pathological processes in the course of the development of sporadic AD. The concept of neuroinflammation has come to the fore, suggesting that inflammatory responses play the leading role in the initiation and development of AD, both in brain tissue and in the periphery. The hypothesis about the key role of neuroinflammation in the pathogenesis of AD opens up new opportunities in the search for ways to treat and prevent this socially significant disease.
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18
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Kimura AM, Tsuji M, Yasumoto T, Mori Y, Oguchi T, Tsuji Y, Umino M, Umino A, Nishikawa T, Nakamura S, Inoue T, Kiuchi Y, Yamada M, Teplow DB, Ono K. Myricetin prevents high molecular weight Aβ 1-42 oligomer-induced neurotoxicity through antioxidant effects in cell membranes and mitochondria. Free Radic Biol Med 2021; 171:232-244. [PMID: 34015458 DOI: 10.1016/j.freeradbiomed.2021.05.019] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/27/2021] [Accepted: 05/10/2021] [Indexed: 12/14/2022]
Abstract
Excessive accumulation of amyloid β-protein (Aβ) is one of the primary mechanisms that leads to neuronal death with phosphorylated tau in the pathogenesis of Alzheimer's disease (AD). Protofibrils, one of the high-molecular-weight Aβ oligomers (HMW-Aβo), are implicated to be important targets of disease modifying therapy of AD. We previously reported that phenolic compounds such as myricetin inhibit Aβ1-40, Aβ1-42, and α-synuclein aggregations, including their oligomerizations, which may exert protective effects against AD and Parkinson's disease. The purpose of this study was to clarify the detailed mechanism of the protective effect of myricetin against the neurotoxicity of HMW-Aβo in SH-SY5Y cells. To assess the effect of myricetin on HMW-Aβo-induced oxidative stress, we systematically examined the level of membrane oxidative damage by measuring cell membrane lipid peroxidation, membrane fluidity, and cell membrane potential, and the mitochondrial oxidative damage was evaluated by mitochondrial permeability transition (MPT), mitochondrial reactive oxygen species (ROS), and manganese-superoxide dismutase (Mn-SOD), and adenosine triphosphate (ATP) assay in SH-SY5Y cells. Myricetin has been found to increased cell viability by suppression of HMW-Aβo-induced membrane disruption in SH-SY5Y cells, as shown in reducing membrane phospholipid peroxidation and increasing membrane fluidity and membrane resistance. Myricetin has also been found to suppress HMW-Aβo-induced mitochondria dysfunction, as demonstrated in decreasing MPT, Mn-SOD, and ATP generation, raising mitochondrial membrane potential, and increasing mitochondrial-ROS generation. These results suggest that myricetin preventing HMW-Aβo-induced neurotoxicity through multiple antioxidant functions may be developed as a disease-modifying agent against AD.
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Affiliation(s)
- Atsushi Michael Kimura
- Department of Pharmacology, Division of Medical Pharmacology, School of Medicine, Showa University, Tokyo, 142-8555, Japan; Pharmacological Research Center, Showa University, Tokyo, 142-8555, Japan; Department of Internal Medicine, Division of Neurology, School of Medicine, Showa University, Tokyo, 142-8666, Japan
| | - Mayumi Tsuji
- Pharmacological Research Center, Showa University, Tokyo, 142-8555, Japan.
| | - Taro Yasumoto
- Department of Internal Medicine, Division of Neurology, School of Medicine, Showa University, Tokyo, 142-8666, Japan
| | - Yukiko Mori
- Department of Internal Medicine, Division of Neurology, School of Medicine, Showa University, Tokyo, 142-8666, Japan
| | - Tatsunori Oguchi
- Department of Pharmacology, Division of Medical Pharmacology, School of Medicine, Showa University, Tokyo, 142-8555, Japan; Pharmacological Research Center, Showa University, Tokyo, 142-8555, Japan
| | - Yuya Tsuji
- Department of Pharmacology, Division of Medical Pharmacology, School of Medicine, Showa University, Tokyo, 142-8555, Japan; Pharmacological Research Center, Showa University, Tokyo, 142-8555, Japan
| | - Masakazu Umino
- Department of Pharmacology, Division of Medical Pharmacology, School of Medicine, Showa University, Tokyo, 142-8555, Japan; Pharmacological Research Center, Showa University, Tokyo, 142-8555, Japan
| | - Asami Umino
- Department of Pharmacology, Division of Medical Pharmacology, School of Medicine, Showa University, Tokyo, 142-8555, Japan; Pharmacological Research Center, Showa University, Tokyo, 142-8555, Japan
| | - Toru Nishikawa
- Department of Pharmacology, Division of Medical Pharmacology, School of Medicine, Showa University, Tokyo, 142-8555, Japan; Pharmacological Research Center, Showa University, Tokyo, 142-8555, Japan
| | - Shiro Nakamura
- Department of Oral Physiology, School of Dentistry, Showa University, Tokyo, 142-8555, Japan
| | - Tomio Inoue
- Department of Oral Physiology, School of Dentistry, Showa University, Tokyo, 142-8555, Japan
| | - Yuji Kiuchi
- Department of Pharmacology, Division of Medical Pharmacology, School of Medicine, Showa University, Tokyo, 142-8555, Japan; Pharmacological Research Center, Showa University, Tokyo, 142-8555, Japan
| | - Masahito Yamada
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Kanazawa University, Kanazawa, 920-8640, Japan
| | - David B Teplow
- Department of Neurology, David Geffen School of Medicine at UCLA, 635 Charles E. Young Drive South, Room 445, Los Angeles, CA, 90095, USA
| | - Kenjiro Ono
- Department of Internal Medicine, Division of Neurology, School of Medicine, Showa University, Tokyo, 142-8666, Japan.
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19
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Kinoshita PF, Orellana AMM, Nakao VW, de Souza Port's NM, Quintas LEM, Kawamoto EM, Scavone C. The Janus face of ouabain in Na + /K + -ATPase and calcium signalling in neurons. Br J Pharmacol 2021; 179:1512-1524. [PMID: 33644859 DOI: 10.1111/bph.15419] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 02/03/2021] [Accepted: 02/14/2021] [Indexed: 12/20/2022] Open
Abstract
Na+ /K+ -ATPase, a transmembrane protein essential for maintaining the electrochemical gradient across the plasma membrane, acts as a receptor for cardiotonic steroids such as ouabain. Cardiotonic steroids binding to Na+ /K+ -ATPase triggers signalling pathways or inhibits Na+ /K+ -ATPas activity in a concentration-dependent manner, resulting in a modulation of Ca2+ levels, which are essential for homeostasis in neurons. However, most of the pharmacological strategies for avoiding neuronal death do not target Na+ /K+ -ATPase activity due to its complexity and the poor understanding of the mechanisms involved in Na+ /K+ -ATPase modulation. The present review aims to discuss two points regarding the interplay between Na+ /K+ -ATPase and Ca2+ signalling in the brain. One, Na+ /K+ -ATPase impairment causing illness and neuronal death due to Ca2+ signalling and two, benefits to the brain by modulating Na+ /K+ -ATPase activity. These interactions play an essential role in neuronal cell fate determination and are relevant to find new targets for the treatment of neurodegenerative diseases.
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Affiliation(s)
- Paula Fernanda Kinoshita
- Laboratory of Molecular Neuropharmacology, Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Ana Maria Marques Orellana
- Laboratory of Molecular Neuropharmacology, Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.,Laboratory of Molecular and Functional Neurobiology, Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Vinicius Watanabe Nakao
- Laboratory of Molecular Neuropharmacology, Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Natacha Medeiros de Souza Port's
- Laboratory of Molecular Neuropharmacology, Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Luis Eduardo Menezes Quintas
- Laboratory of Biochemical and Molecular Pharmacology, Institute of Biomedical Sciences, Health Sciences Centre Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Elisa Mitiko Kawamoto
- Laboratory of Molecular and Functional Neurobiology, Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Cristoforo Scavone
- Laboratory of Molecular Neuropharmacology, Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
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20
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Fronza MG, Baldinotti R, Sacramento M, Gutierres J, Carvalho FB, Fernandes MDC, Sousa FSS, Seixas FK, Collares T, Alves D, Pratico D, Savegnago L. Effect of QTC-4-MeOBnE Treatment on Memory, Neurodegeneration, and Neurogenesis in a Streptozotocin-Induced Mouse Model of Alzheimer's Disease. ACS Chem Neurosci 2021; 12:109-122. [PMID: 33315382 DOI: 10.1021/acschemneuro.0c00615] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Growing evidence suggests that drugs targeting neurogenesis and myelinization could be novel therapeutic targets against Alzheimer's disease (AD). Intracerebroventricular (icv) injection of streptozotocin (STZ) induces neurodegeneration through multiple mechanisms ultimately resulting in reduced adult neurogenesis. Previously, the multitarget compound QTC-4-MeOBnE (1-(7-chloroquinolin-4-yl)-N-(4-methoxybenzyl)-5-methyl-1H-1,2,3-triazole-4-carboxamide) demonstrated beneficial effects in preclinical models of AD. Here we investigated its pharmacokinetics profile and the effect on memory impairments and neurodegeneration induced by STZ. Two icv injections of STZ resulted in significant cognitive and memory impairments, assessed by novel object recognition, Y-maze, social recognition, and step-down passive avoidance paradigms. These deficits were reversed in STZ-injected mice treated with QTC-4-MeOBnE. This effect was associated with reversion of neuronal loss in hippocampal dentate gyrus, reduced oxidative stress, and amelioration of synaptic function trough Na+/K+ ATPase and acetylcholinesterase activities. Furthermore, brains from QTC-4-MeOBnE-treated mice had a significant increase in adult neurogenesis and remyelination through Prox1/NeuroD1 and Wnt/β-catenin pathways. Overall, our findings support the potential anti-AD effect of QTC-4-MeOBnE through multiple pathways, all of which have been involved in the onset and progression of the disease.
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Affiliation(s)
- Mariana G. Fronza
- Research Group on Neurobiotechnology−GPN, Technological Development Center (CDTec), Federal University of Pelotas (UFPel), Pelotas, RS 96010-610, Brazil
| | - Rodolfo Baldinotti
- Research Group on Neurobiotechnology−GPN, Technological Development Center (CDTec), Federal University of Pelotas (UFPel), Pelotas, RS 96010-610, Brazil
| | - Manoela Sacramento
- Laboratory of Clean Organic Synthesis−LASOL, Center for Chemical, Pharmaceutical and Food Sciences (CCQFA), UFPel, Pelotas, RS 96010-610, Brazil
| | - Jessié Gutierres
- Pathology Laboratory, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, RS 90050-170, Brazil
| | - Fabiano Barbosa Carvalho
- Pathology Laboratory, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, RS 90050-170, Brazil
| | - Marilda da Cruz Fernandes
- Pathology Laboratory, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, RS 90050-170, Brazil
| | | | - Fabiana K. Seixas
- Oncology Research Group, GPO, CDTec, UFPel, CDTec, Pelotas, RS 96010-610, Brazil
| | - Tiago Collares
- Oncology Research Group, GPO, CDTec, UFPel, CDTec, Pelotas, RS 96010-610, Brazil
| | - Diego Alves
- Laboratory of Clean Organic Synthesis−LASOL, Center for Chemical, Pharmaceutical and Food Sciences (CCQFA), UFPel, Pelotas, RS 96010-610, Brazil
| | - Domenico Pratico
- Alzheimer’s Center at Temple−ACT, Temple University, Lewis Katz School of Medicine, Philadelphia, Pennsylvania 19140, United States of America
| | - Lucielli Savegnago
- Research Group on Neurobiotechnology−GPN, Technological Development Center (CDTec), Federal University of Pelotas (UFPel), Pelotas, RS 96010-610, Brazil
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21
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Petrushanko IY, Mitkevich VA, Makarov AA. Molecular Mechanisms of the Redox Regulation of the Na,K-ATPase. Biophysics (Nagoya-shi) 2020. [DOI: 10.1134/s0006350920050139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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22
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Gheorghiu M, Stănică L, Ghinia Tegla MG, Polonschii C, Bratu D, Popescu O, Badea T, Gheorghiu E. Cellular sensing platform with enhanced sensitivity based on optogenetic modulation of cell homeostasis. Biosens Bioelectron 2020; 154:112003. [PMID: 32056953 PMCID: PMC7685521 DOI: 10.1016/j.bios.2019.112003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 12/26/2019] [Accepted: 12/28/2019] [Indexed: 12/29/2022]
Abstract
We demonstrate a new biosensing concept with impact on the development of rapid, point of need cell based sensing with boosted sensitivity and wide relevance for bioanalysis. It involves optogenetic stimulation of cells stably transfected to express light sensitive protein channels for optical control of membrane potential and of ion homeostasis. Time-lapse impedance measurements are used to reveal cell dynamics changes encompassing cellular responses to bioactive stimuli and optically induced homeostasis disturbances. We prove that light driven perturbations of cell membrane potential induce homeostatic reactions and modulate transduction mechanisms that amplify cellular response to bioactive compounds. This allows cell based biosensors to respond more rapidly and sensitively to low concentrations of bioactive/toxic analytes: statistically relevant impedance changes are recorded in less than 30 min, in comparison with >8 h in the best alternative reported tests for the same low concentration (e.g. a concentration of 25 μM CdCl2, lower than the threshold concentration in classical cellular sensors). Comparative analysis of model bioactive/toxic compounds (ouabain and CdCl2) demonstrates that cellular reactivity can be boosted by light driven perturbations of cellular homeostasis and that this biosensing concept is able to discriminate analytes with different modes of action (i.e. CdCl2 toxicity versus ion pump inhibition by ouabain), a significant advance against state of the art cell based sensors.
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Affiliation(s)
- Mihaela Gheorghiu
- International Centre of Biodynamics, Intr. Portocalelor 1 B, 060101, Bucharest, Romania; Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, Bucharest, 050095, Romania.
| | - Luciana Stănică
- International Centre of Biodynamics, Intr. Portocalelor 1 B, 060101, Bucharest, Romania; Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, Bucharest, 050095, Romania
| | - Miruna G Ghinia Tegla
- Institute for Interdisciplinary Research in Bio-Nano-Sciences, Molecular Biology Center, Babes-Bolyai-University, 400084, Cluj-Napoca, Romania; Retinal Circuit Development & Genetics Unit N-NRL/NEI/NIH 6 Center Drive Bethesda, 20892, Maryland, United States
| | - Cristina Polonschii
- International Centre of Biodynamics, Intr. Portocalelor 1 B, 060101, Bucharest, Romania.
| | - Dumitru Bratu
- International Centre of Biodynamics, Intr. Portocalelor 1 B, 060101, Bucharest, Romania.
| | - Octavian Popescu
- Institute for Interdisciplinary Research in Bio-Nano-Sciences, Molecular Biology Center, Babes-Bolyai-University, 400084, Cluj-Napoca, Romania; Institute of Biology, Romanian Academy, 296 Splaiul Independentei, 060031, Bucharest, Romania
| | - Tudor Badea
- Retinal Circuit Development & Genetics Unit N-NRL/NEI/NIH 6 Center Drive Bethesda, 20892, Maryland, United States.
| | - Eugen Gheorghiu
- International Centre of Biodynamics, Intr. Portocalelor 1 B, 060101, Bucharest, Romania; Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, Bucharest, 050095, Romania.
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23
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Yoneda JS, Sebinelli HG, Itri R, Ciancaglini P. Overview on solubilization and lipid reconstitution of Na,K-ATPase: enzyme kinetic and biophysical characterization. Biophys Rev 2020; 12:49-64. [PMID: 31955383 DOI: 10.1007/s12551-020-00616-5] [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: 12/10/2019] [Accepted: 01/07/2020] [Indexed: 12/11/2022] Open
Abstract
Na,K-ATPase is a membrane protein which plays a vital role. It pumps Na+ and K+ ions across the cellular membranes using energy from ATP hydrolysis, and is responsible for maintaining the osmotic equilibrium and generating the membrane potential. Moreover, Na,K-ATPase has also been involved in cell signaling, interacting with partner proteins. Cardiotonic steroids bind specifically to Na,K-ATPase triggering a number of signaling pathways. Because of its importance, many efforts have been employed to study the structure and function of this protein. Difficulties associated with its removal from natural membranes and the concomitant search for appropriate replacement conditions to keep the protein in solution have presented a challenge that had to be overcome prior to carrying out biophysical and biochemical studies in vitro. In this review, we summarized all of the methods and techniques applied by our group in order to obtain information about Na,K-ATPase in respect to solubilization, reconstitution into mimetic system, influence of lipid composition, stability, oligomerization, and aggregation.
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Affiliation(s)
- Juliana Sakamoto Yoneda
- Instituto de Fisica, Universidade de Sao Paulo, Rua do Matao, 1371, 05508-090, Sao Paulo, SP, Brazil.
| | - Heitor Gobbi Sebinelli
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto, SP, 14040-901, Brazil
| | - Rosangela Itri
- Instituto de Fisica, Universidade de Sao Paulo, Rua do Matao, 1371, 05508-090, Sao Paulo, SP, Brazil
| | - Pietro Ciancaglini
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto, SP, 14040-901, Brazil
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Regulation of Neuronal Na +/K +-ATPase by Specific Protein Kinases and Protein Phosphatases. J Neurosci 2019; 39:5440-5451. [PMID: 31085608 DOI: 10.1523/jneurosci.0265-19.2019] [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: 01/31/2019] [Revised: 03/27/2019] [Accepted: 04/16/2019] [Indexed: 01/13/2023] Open
Abstract
The Na+/K+-ATPase (NKA) is a ubiquitous membrane-bound enzyme responsible for generating and maintaining the Na+ and K+ electrochemical gradients across the plasmalemma of living cells. Numerous studies in non-neuronal tissues have shown that this transport mechanism is reversibly regulated by phosphorylation/dephosphorylation of the catalytic α subunit and/or associated proteins. In neurons, Na+/K+ transport by NKA is essential for almost all neuronal operations, consuming up to two-thirds of the neuron's energy expenditure. However, little is known about its cellular regulatory mechanisms. Here we have used an electrophysiological approach to monitor NKA transport activity in male rat hippocampal neurons in situ We report that this activity is regulated by a balance between serine/threonine phosphorylation and dephosphorylation. Phosphorylation by the protein kinases PKG and PKC inhibits NKA activity, whereas dephosphorylation by the protein phosphatases PP-1 and PP-2B (calcineurin) reverses this effect. Given that these kinases and phosphatases serve as downstream effectors in key neuronal signaling pathways, they may mediate the coupling of primary messengers, such as neurotransmitters, hormones, and growth factors, to the NKAs, through which multiple brain functions can be regulated or dysregulated.SIGNIFICANCE STATEMENT The Na+/K+-ATPase (NKA), known as the "Na+ pump," is a ubiquitous membrane-bound enzyme responsible for generating and maintaining the Na+ and K+ electrochemical gradients across the plasma membrane of living cells. In neurons, as in most types of cells, the NKA generates the negative resting membrane potential, which is the basis for almost all aspects of cellular function. Here we used an electrophysiological approach to monitor physiological NKA transport activity in single hippocampal pyramidal cells in situ We have found that neuronal NKA activity is oppositely regulated by phosphorylation and dephosphorylation, and we have identified the main protein kinases and phosphatases mediating this regulation. This fundamental form of NKA regulation likely plays a role in multiple brain functions.
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Na +/K +-pump and neurotransmitter membrane receptors. INVERTEBRATE NEUROSCIENCE 2018; 19:1. [PMID: 30488358 PMCID: PMC6267510 DOI: 10.1007/s10158-018-0221-7] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 11/17/2018] [Indexed: 02/06/2023]
Abstract
Na+/K+-pump is an electrogenic transmembrane ATPase located in the outer plasma membrane of cells. The Na+/K+-ATPase pumps 3 sodium ions out of cells while pumping 2 potassium ions into cells. Both cations move against their concentration gradients. This enzyme's electrogenic nature means that it has a chronic role in stabilizing the resting membrane potential of the cell, in regulating the cell volume and in the signal transduction of the cell. This review will mainly consider the role of the Na+/K+-pump in neurons, with an emphasis on its role in modulating neurotransmitter receptor. Most of the literature on the modulation of neurotransmitter receptors refers to the situation in the mammalian nervous system, but the position is likely to be similar in most, if not all, invertebrate nervous systems.
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26
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Buneeva OA, Gnedenko OV, Medvedeva MV, Ivanov AS, Medvedev AE. [The effect of the neuroprotector isatin on complex formation of beta-amyloid peptide fragments with some intracellular proteins]. BIOMEDIT︠S︡INSKAI︠A︡ KHIMII︠A︡ 2018; 64:423-428. [PMID: 30378558 DOI: 10.18097/pbmc20186405423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Amyloid-β peptide (1-42) (Aβ1-42) is a key player in the development and progression of Alzheimer's disease (AD) and related pathologies, determined by formation of protein aggregates in the central nervous system. Aβ1-42 binding to crucial intracellular targets (and their subsequent inactivation) obviously represents one of the earliest events preceding extracellular pathogenic oligomerization/aggregation of Aβ1-42. It is reasonable to expect that dissociation of the Aβ1-42 complexes with intracellular proteins by means of inhibitors followed by subsequent degradation of Aβ1-42 would not only protect critically important proteins but also prevent intracellular accumulation of Aβ1-42. The aim of this study was to investigate the effect of the neuroprotector isatin (100 mM) on interaction of known Aβ-binding proteins, glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and pyruvate kinase, with Aβ1-42 and its fragments (Aβ1-28, Aβ12-28, Aβ25-35). Aβ1-42 and its fragments (Aβ1-28, Aβ12-28, Aβ25-35) immobilized on the Biacore optical biosensor chip interacted with GAPDH and pyruvate kinase. The lowest and basically equal Kd values were determined for GAPDH and pyruvate kinase complexes with immobilized Aβ1-42 and Aβ25-35. The presence of 100 mM isatin caused a significant (more than fivefold) increase in the Kd values for GAPDH complexes with all Aβ peptides except Aβ1-28. In contrast to GAPDH isatin increased dissociation of pyruvate kinase complexes only with Aβ1-42 (causing a 30-fold increase in Kd) and to a lesser extent with Aβ12-28 and Aβ25-35 (a 10-fold increase in Kd). It should be noted that in the presence of isatin the Kd values for GAPDH and pyruvate kinase complexes with all Aβ studied were in a narrower concentration range (10-7 M - 10-6 M) than in the absence of this neuroprotector (10-8 M - 10-6 M). Data obtained suggest existence of principal possibility of (pharmacological) protection of crucial intracellular targets against both Aβ1-42, and its aggressive truncated peptides (Aβ25-35).
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Affiliation(s)
- O A Buneeva
- Institute of Biomedical Chemistry, Moscow, Russia; Higher School of Economics, Moscow, Russia
| | - O V Gnedenko
- Institute of Biomedical Chemistry, Moscow, Russia; Higher School of Economics, Moscow, Russia
| | | | - A S Ivanov
- Institute of Biomedical Chemistry, Moscow, Russia; Higher School of Economics, Moscow, Russia
| | - A E Medvedev
- Institute of Biomedical Chemistry, Moscow, Russia; Higher School of Economics, Moscow, Russia
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Barykin EP, Petrushanko IY, Kozin SA, Telegin GB, Chernov AS, Lopina OD, Radko SP, Mitkevich VA, Makarov AA. Phosphorylation of the Amyloid-Beta Peptide Inhibits Zinc-Dependent Aggregation, Prevents Na,K-ATPase Inhibition, and Reduces Cerebral Plaque Deposition. Front Mol Neurosci 2018; 11:302. [PMID: 30210292 PMCID: PMC6123382 DOI: 10.3389/fnmol.2018.00302] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 08/09/2018] [Indexed: 12/11/2022] Open
Abstract
The triggers of late-onset sporadic Alzheimer's disease (AD) are still poorly understood. Impairment of protein phosphorylation with age is well-known; however, the role of the phosphorylation in β-amyloid peptide (Aβ) is not studied sufficiently. Zinc-induced oligomerization of Aβ represents a potential seeding mechanism for the formation of neurotoxic Aβ oligomers and aggregates. Phosphorylation of Aβ by Ser8 (pS8-Aβ), localized inside the zinc-binding domain of the peptide, may significantly alter its zinc-induced oligomerization. Indeed, using dynamic light scattering, we have shown that phosphorylation by Ser8 dramatically reduces zinc-induced aggregation of Aβ, and moreover pS8-Aβ suppresses zinc-driven aggregation of non-modified Aβ in an equimolar mixture. We have further analyzed the effect of pS8-Aβ on the progression of cerebral amyloidosis with serial retro-orbital injections of the peptide in APPSwe/PSEN1dE9 murine model of AD, followed by histological analysis of amyloid burden in hippocampus. Unlike the non-modified Aβ that has no influence on the amyloidosis progression in murine models of AD, pS8-Aβ injections reduced the number of amyloid plaques in the hippocampus of mice by one-third. Recently shown inhibition of Na+,K+-ATPase activity by Aβ, which is thought to be a major contributor to neuronal dysfunction in AD, is completely reversed by phosphorylation of the peptide. Thus, several AD-associated pathogenic properties of Aβ are neutralized by its phosphorylation.
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Affiliation(s)
- Evgeny P. Barykin
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Irina Y. Petrushanko
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Sergey A. Kozin
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Georgy B. Telegin
- Pushchino Branch of Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Pushchino, Russia
| | - Alexander S. Chernov
- Pushchino Branch of Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Pushchino, Russia
| | - Olga D. Lopina
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Sergey P. Radko
- Institute of Biomedical Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Vladimir A. Mitkevich
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Alexander A. Makarov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
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28
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Anashkina AA, Kravatsky Y, Kuznetsov E, Makarov AA, Adzhubei AA. Meta-server for automatic analysis, scoring and ranking of docking models. Bioinformatics 2017; 34:297-299. [PMID: 28968724 DOI: 10.1093/bioinformatics/btx591] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 07/28/2017] [Accepted: 09/15/2017] [Indexed: 11/14/2022] Open
Abstract
MOTIVATION Modelling with multiple servers that use different algorithms for docking results in more reliable predictions of interaction sites. However, the scoring and comparison of all models by an expert is time-consuming and is not feasible for large volumes of data generated by such modelling. RESULTS Quality ASsessment of DOcking Models (QASDOM) Server is a simple and efficient tool for real-time simultaneous analysis, scoring and ranking of data sets of receptor-ligand complexes built by a range of docking techniques. This meta-server is designed to analyse large data sets of docking models and rank them by scoring criteria developed in this study. It produces two types of output showing the likelihood of specific residues and clusters of residues to be involved in receptor-ligand interactions and the ranking of models. The server also allows visualizing residues that form interaction sites in the receptor and ligand sequence and displays 3D model structures of the receptor-ligand complexes. AVAILABILITY http://qasdom.eimb.ru. SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Anastasia A Anashkina
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Yuri Kravatsky
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Eugene Kuznetsov
- V. A. Trapeznikov Institute of Control Sciences of Russian Academy of Sciences, Moscow, Russia
| | - Alexander A Makarov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Alexei A Adzhubei
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
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Lakunina VA, Petrushanko IY, Burnysheva KM, Mitkevich VA, Makarov AA. Alzheimer’s disease Aβ42 peptide induces an increase in Na,K-ATPase glutathionylation. DOKL BIOCHEM BIOPHYS 2017; 473:114-117. [DOI: 10.1134/s1607672917020077] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Indexed: 11/22/2022]
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