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Dissanayake KN, Redman RR, Mackenzie H, Eddleston M, Ribchester RR. "Calcium bombs" as harbingers of synaptic pathology and their mitigation by magnesium at murine neuromuscular junctions. Front Mol Neurosci 2022; 15:937974. [PMID: 35959105 PMCID: PMC9361872 DOI: 10.3389/fnmol.2022.937974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 07/04/2022] [Indexed: 12/24/2022] Open
Abstract
Excitotoxicity is thought to be an important factor in the onset and progression of amyotrophic lateral sclerosis (ALS). Evidence from human and animal studies also indicates that early signs of ALS include degeneration of motor nerve terminals at neuromuscular junctions (NMJs), before degeneration of motor neuron cell bodies. Here we used a model of excitotoxicity at NMJs in isolated mouse muscle, utilizing the organophosphorus (OP) compound omethoate, which inhibits acetylcholinesterase activity. Acute exposure to omethoate (100 μM) induced prolonged motor endplate contractures in response to brief tetanic nerve stimulation at 20-50 Hz. In some muscle fibers, Fluo-4 fluorescence showed association of these contractures with explosive increases in Ca2+ ("calcium bombs") localized to motor endplates. Calcium bombs were strongly and selectively mitigated by increasing Mg2+ concentration in the bathing medium from 1 to 5 mM. Overnight culture of nerve-muscle preparations from WldS mice in omethoate or other OP insecticide components and their metabolites (dimethoate, cyclohexanone, and cyclohexanol) induced degeneration of NMJs. This degeneration was also strongly mitigated by increasing [Mg2+] from 1 to 5 mM. Thus, equivalent increases in extracellular [Mg2+] mitigated both post-synaptic calcium bombs and degeneration of NMJs. The data support a link between Ca2+ and excitotoxicity at NMJs and suggest that elevating extracellular [Mg2+] could be an effective intervention in treatment of synaptic pathology induced by excitotoxic triggers.
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Affiliation(s)
- Kosala N. Dissanayake
- Euan MacDonald Centre for Motor Neurone Disease Research, The University of Edinburgh, Edinburgh, United Kingdom,Centre for Discovery Brain Sciences, The University of Edinburgh, Edinburgh, United Kingdom
| | - Robert R. Redman
- Euan MacDonald Centre for Motor Neurone Disease Research, The University of Edinburgh, Edinburgh, United Kingdom,Centre for Discovery Brain Sciences, The University of Edinburgh, Edinburgh, United Kingdom
| | - Harry Mackenzie
- Euan MacDonald Centre for Motor Neurone Disease Research, The University of Edinburgh, Edinburgh, United Kingdom,Centre for Discovery Brain Sciences, The University of Edinburgh, Edinburgh, United Kingdom
| | - Michael Eddleston
- Clinical Pharmacology, Toxicology and Therapeutics, Centre for Cardiovascular Science, Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, United Kingdom
| | - Richard R. Ribchester
- Euan MacDonald Centre for Motor Neurone Disease Research, The University of Edinburgh, Edinburgh, United Kingdom,Centre for Discovery Brain Sciences, The University of Edinburgh, Edinburgh, United Kingdom,*Correspondence: Richard R. Ribchester,
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2
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Yalazan H, Tüzün B, Akkaya D, Barut B, Kantekin H, Yıldırmış S. Quinoline‐fused both non‐peripheral and peripheral Zn
II
and Mg
II
phthalocyanines: Anti‐cholinesterase, anti‐α‐glucosidase, DNA nuclease, antioxidant activities and in silico studies. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6696] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Halise Yalazan
- Faculty of Sciences, Department of Chemistry Karadeniz Technical University Trabzon Turkey
| | - Burak Tüzün
- Plant and Animal Production Department, Technical Sciences Vocational School of Sivas Sivas Cumhuriyet University Sivas Turkey
| | - Didem Akkaya
- Faculty of Pharmacy, Department of Biochemistry Karadeniz Technical University Trabzon Turkey
| | - Burak Barut
- Faculty of Pharmacy, Department of Biochemistry Karadeniz Technical University Trabzon Turkey
| | - Halit Kantekin
- Faculty of Sciences, Department of Chemistry Karadeniz Technical University Trabzon Turkey
| | - Sermet Yıldırmış
- Faculty of Pharmacy, Department of Biochemistry Karadeniz Technical University Trabzon Turkey
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3
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Yuan Y, Zhao M, Riffault-Valois L, Ennahar S, Bergaentzlé M, Marchioni E. Online acetylcholinesterase inhibition evaluation by high-performance liquid chromatography–mass spectrometry hyphenated with an immobilized enzyme reactor. J Chromatogr A 2020; 1609:460506. [DOI: 10.1016/j.chroma.2019.460506] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 08/29/2019] [Accepted: 09/01/2019] [Indexed: 11/28/2022]
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4
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Zhang Q, Hu Y, Wu D, Ma S, Wang J, Rao J, Xu L, Xu H, Shao H, Guo Z, Wang S. Protein-mimicking nanowire-inspired electro-catalytic biosensor for probing acetylcholinesterase activity and its inhibitors. Talanta 2018; 183:258-267. [PMID: 29567174 DOI: 10.1016/j.talanta.2018.02.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 02/05/2018] [Accepted: 02/07/2018] [Indexed: 12/18/2022]
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5
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Romero-Güiza MS, Mata-Alvarez J, Chimenos JM, Astals S. The effect of magnesium as activator and inhibitor of anaerobic digestion. WASTE MANAGEMENT (NEW YORK, N.Y.) 2016; 56:137-142. [PMID: 27402564 DOI: 10.1016/j.wasman.2016.06.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 06/28/2016] [Accepted: 06/28/2016] [Indexed: 06/06/2023]
Abstract
Anaerobic digestion stands as a key technology in the emerging green energy economy. Mg(2+) has been identified as an important element to improve digesters methane production; however the inhibition risk that high Mg(2+) concentrations can cause to the AD process must also be considered when dosing Mg reagents and wastes containing Mg(2+). Despite its importance, Mg(2+) stimulation and inhibition mechanisms as well as threshold values are scarce in the literature. This research paper investigates the impact (stimulation and inhibition) of Mg(2+) on pig manure anaerobic digestion. Mathematical modelling was used to better understand the interaction between substrate, inoculum and magnesium, where Mg(2+) inhibition was modelled by a n-component non-competitive inhibition function. Modelling was done on absolute curves rather than specific methane productions curves (new approach) to account for the lower background methane production of the inoculum as the Mg(2+) concentration increased. Results showed that no stimulation or inhibition occurred between 40 (native concentration) and 400mgMg(2+)L(-1), while minor and major inhibition were observed at 750 and 1000mgMg(2+)L(-1), and at 2000 and 4000mgMg(2+)L(-1), respectively. Mg(2+) half maximal inhibition concentration was estimated at 2140mgMg(2+)L(-1) with an inhibition order of 2. The latter indicates that Mg(2+) inhibition is a progressive rather than a steep inhibition mechanism.
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Affiliation(s)
- M S Romero-Güiza
- Department of Chemical Engineering, University of Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain; Department of Materials Science and Metallurgical Engineering, University of Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain
| | - J Mata-Alvarez
- Department of Chemical Engineering, University of Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain
| | - J M Chimenos
- Department of Materials Science and Metallurgical Engineering, University of Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain
| | - S Astals
- Department of Chemical Engineering, University of Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain; Advanced Water Management Centre, The University of Queensland, St. Lucia, QLD 4072, Australia.
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6
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Draczkowski P, Tomaszuk A, Halczuk P, Strzemski M, Matosiuk D, Jozwiak K. Determination of affinity and efficacy of acetylcholinesterase inhibitors using isothermal titration calorimetry. Biochim Biophys Acta Gen Subj 2016; 1860:967-974. [DOI: 10.1016/j.bbagen.2015.11.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 10/23/2015] [Accepted: 11/10/2015] [Indexed: 10/22/2022]
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7
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Geneste A, André C, Magy-Bertrand N, Lethier L, Tijani G, Guillaume YC. Thermodynamic study of transthyretin association (wild-type and senile forms) with heparan sulfate proteoglycan: pH effect and implication of the reactive histidine residue. Biomed Chromatogr 2014; 29:514-22. [DOI: 10.1002/bmc.3306] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 06/02/2014] [Accepted: 07/10/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Ambre Geneste
- Université de Franche-Comté, UFR SMP, EA 4662: Nanomedecine, Imagery Therapeupic Lab’, Laboratoire de Chimie Analytique Bioanalytique et Physique; 25030 Besançon cedex France
| | - Claire André
- Université de Franche-Comté, UFR SMP, EA 4662: Nanomedecine, Imagery Therapeupic Lab’, Laboratoire de Chimie Analytique Bioanalytique et Physique; 25030 Besançon cedex France
| | - Nadine Magy-Bertrand
- Université de Franche-Comté, UFR SMP, EA 4662: Nanomedecine, Imagery Therapeupic Lab’, Laboratoire de Chimie Analytique Bioanalytique et Physique; 25030 Besançon cedex France
- Département de Médecine Interne; CHRU Besançon; 25030 Besançon cedex France
| | - Lydie Lethier
- Université de Franche-Comté, UFR SMP, EA 4662: Nanomedecine, Imagery Therapeupic Lab’, Laboratoire de Chimie Analytique Bioanalytique et Physique; 25030 Besançon cedex France
| | - Gharbi Tijani
- Université de Franche-Comté, UFR SMP, EA 4662: Nanomedecine, Imagery Therapeupic Lab’, Laboratoire de Chimie Analytique Bioanalytique et Physique; 25030 Besançon cedex France
| | - Yves Claude Guillaume
- Université de Franche-Comté, UFR SMP, EA 4662: Nanomedecine, Imagery Therapeupic Lab’, Laboratoire de Chimie Analytique Bioanalytique et Physique; 25030 Besançon cedex France
- Pôle Pharmacie; CHRU Besançon; 25030 Besançon cedex France
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Geneste A, Guillaume YC, Magy-Bertrand N, Lethier L, Gharbi T, André C. The protease activity of transthyretin reverses the effect of pH on the amyloid-β protein/heparan sulfate proteoglycan interaction: A biochromatographic study. J Pharm Biomed Anal 2014; 97:88-96. [DOI: 10.1016/j.jpba.2014.04.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 04/18/2014] [Accepted: 04/21/2014] [Indexed: 10/25/2022]
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9
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Ibrahim F, Andre C, Iutzeler A, Guillaume YC. Analysis of the activation of acetylcholinesterase by carbon nanoparticles using a monolithic immobilized enzyme microreactor: role of the water molecules in the active site gorge. J Enzyme Inhib Med Chem 2014; 28:1010-4. [PMID: 24020636 DOI: 10.3109/14756366.2012.705835] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A biochromatographic system was used to study the direct effect of carbon nanoparticles (CNPs) on the acetylcholinesterase (AChE) activity. The AChE enzyme was covalently immobilized on a monolithic CIM-disk via its NH2 residues. Our results showed an increase in the AChE activity in presence of CNPs. The catalytic constant (k(cat)) was increased while the Michaelis constant (K(m)) was slightly decreased. This indicated an increase in the enzyme efficiency with increase of the substrate affinity to the active site. The thermodynamic data of the activation mechanism of the enzyme, i.e. ΔH* and ΔS*, showed no change in the substrate interaction mechanism with the anionic binding site. The increase of the enthalpy (ΔH*) and the entropy (ΔS*) with decrease in the free energy of activation (Ea) was related to structural conformation change in the active site gorge. This affected the stability of water molecules in the active site gorge and facilitated water displacement by substrate for entering to the active site of the enzyme.
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Filz OA, Lagunin AA, Filimonov DA, Poroikov VV. In silico fragment-based drug design using a PASS approach. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2012; 23:279-296. [PMID: 22372682 DOI: 10.1080/1062936x.2012.657238] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Fragment-based drug design integrates different methods to create novel ligands using fragment libraries focused on particular biological activities. Experimental approaches to the preparation of fragment libraries have some drawbacks caused by the need for target crystallization (X-ray and nuclear magnetic resonance) and careful immobilization (surface plasmon resonance). Molecular modelling (docking) requires accurate data on protein-ligand interactions, which are difficult to obtain for some proteins. The main drawbacks of QSAR application are associated with the need to collect large homogeneous datasets of chemical structures with experimentally determined self-consistent quantitative values (potency). We propose a ligand-based approach to the selection of fragments with positive contribution to biological activity, developed on the basis of the PASS algorithm. The robustness of the PASS algorithm for heterogeneous datasets has been shown earlier. PASS estimates qualitative (yes/no) prediction of biological activity spectra for over 4000 biological activities and, therefore, provides the basis for the preparation of a fragment library corresponding to multiple criteria. The algorithm for fragment selection has been validated using the fractions of intermolecular interactions calculated for known inhibitors of nine enzymes extracted from the Protein Data Bank database. The statistical significance of differences between fractions of intermolecular interactions corresponds, for several enzymes, to the estimated positive and negative contribution of fragments in enzyme inhibition.
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Affiliation(s)
- O A Filz
- Department of Bioinformatics, Biomedical Chemistry Institute of the Russian Medical Sciences Academy, Moscow, Russia.
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11
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Sarr FS, André C, Guillaume YC. A novel biochromatographic Oatp2 column to study the transmembrane transport of statins. J Pharm Biomed Anal 2010; 52:93-8. [DOI: 10.1016/j.jpba.2009.11.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2009] [Revised: 09/10/2009] [Accepted: 11/27/2009] [Indexed: 10/20/2022]
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