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Varfolomeev SD, Bykov VI, Semenova NA, Tsybenova SB. Dynamics of the Multipathway Regulation of the Vasodilator Bold Effect Induced by a Nerve Impulse: A Kinetic Model of the Neurovascular Coupling Process. ACS Chem Neurosci 2021; 12:2202-2208. [PMID: 34096262 DOI: 10.1021/acschemneuro.1c00214] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
A kinetic model of the dynamics of a multipathway mechanism of neurovascular coupling induced by nerve impulses was constructed. The model calculations were compared with experimental data on the changes in the blood oxygen level dependent signal during sensory-motor and visual excitation before and after the use of the nonsteroidal anti-inflammatory drug indomethacin. The influence of the catalytic activity of key enzymes on the dynamics of the neurovascular response in the proposed model is shown. The multipathway mechanism of the biochemical reactions provides stability of the neurovascular coupling during various possible catalytic activities of the key enzymes in the process.
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Affiliation(s)
- Sergey D. Varfolomeev
- Institute of Physical and Chemical Grounds of Neuronet Functions and Artificial Intelligence, Lomonosov Moscow State University, Moscow 119991, Russia
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
- Emanuel Institute of Biochemical Physics, Moscow 119334, Russia
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Varfolomeev SD, Bykov VI, Tsybenova SB. Kinetic modeling of dynamic processes in the cholinergic synapse. Russ Chem Bull 2020. [DOI: 10.1007/s11172-020-2939-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Varfolomeev SD, Bykov VI, Tsybenova SB. Kinetics of Chemical Processes in the Human Brain. The Cholinergic Synapse-Mechanisms of Functioning and Control Methods. DOKL BIOCHEM BIOPHYS 2020; 492:147-151. [PMID: 32632593 DOI: 10.1134/s1607672920030126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 03/06/2020] [Accepted: 03/10/2020] [Indexed: 11/23/2022]
Abstract
In the framework of the kinetic model, the functioning of the cholinergic synapse is considered. The results of mathematical modeling of changes in the level of acetylcholine, induced pH impulse, the influence of the frequency of impulse transmission and inhibition of acetylcholinesterase are presented. Physicochemical explanation for a number of important physiological phenomena, such as neuromuscular paralysis, the molecular mechanism of neurological memory, and actions of nerve poisons and toxins, is given.
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Affiliation(s)
- S D Varfolomeev
- Institute of Physicochemical Foundations of the Functioning of Neural Network and Artificial Intellegence, Moscow State University, Moscow, Russia
| | - V I Bykov
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia.
| | - S B Tsybenova
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
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Varfolomeev SD, Bykov VI, Tsybenova SB. Kinetics of Chemical Processes in the Human Brain. Proton Blockade of Acetylcholinesterase and pH-Impulse in the Mechanism of Functioning of the Cholinergic Synapse. DOKL BIOCHEM BIOPHYS 2020; 491:85-88. [PMID: 32483758 DOI: 10.1134/s1607672920020155] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 09/09/2019] [Accepted: 09/09/2019] [Indexed: 11/23/2022]
Abstract
A kinetic model describing the dynamics of synaptic "discharge" taking into account the kinetics of the injection of the neurotransmitter into the synaptic cleft, the pH-dependence of the catalytic activity of the enzyme, and diffusion withdrawal of protons is proposed. The model provides a physicochemical explanation for a number of important physiological phenomena, such as the neuromuscular paralysis, the molecular mechanism of neurological memory, and the effect of some neurotoxins and drugs.
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Affiliation(s)
- S D Varfolomeev
- Institute of Physicochemical Foundations of the Functioning of Neural Network and Artificial Intellegence, Moscow State University, 119991, Moscow, Russia
| | - V I Bykov
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334, Moscow, Russia.
| | - S B Tsybenova
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334, Moscow, Russia
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Cavalcante SFDA, Simas ABC, Barcellos MC, de Oliveira VGM, Sousa RB, Cabral PADM, Kuča K, França TCC. Acetylcholinesterase: The "Hub" for Neurodegenerative Diseases and Chemical Weapons Convention. Biomolecules 2020; 10:E414. [PMID: 32155996 PMCID: PMC7175162 DOI: 10.3390/biom10030414] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 03/02/2020] [Accepted: 03/03/2020] [Indexed: 12/12/2022] Open
Abstract
This article describes acetylcholinesterase (AChE), an enzyme involved in parasympathetic neurotransmission, its activity, and how its inhibition can be pharmacologically useful for treating dementia, caused by Alzheimer's disease, or as a warfare method due to the action of nerve agents. The chemical concepts related to the irreversible inhibition of AChE, its reactivation, and aging are discussed, along with a relationship to the current international legislation on chemical weapons.
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Affiliation(s)
- Samir F. de A. Cavalcante
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Avenida das Américas 28705, Rio de Janeiro 23020-470, Brazil; (M.C.B.); (V.G.M.d.O.); (R.B.S.); (P.A.d.M.C.)
- Walter Mors Institute of Research on Natural Products (IPPN), Federal University of Rio de Janeiro (UFRJ), CCS, Bloco H, Rio de Janeiro 21941-902, Brazil
- Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanskeho 62, 50003 Hradec Králové, Czech Republic
| | - Alessandro B. C. Simas
- Walter Mors Institute of Research on Natural Products (IPPN), Federal University of Rio de Janeiro (UFRJ), CCS, Bloco H, Rio de Janeiro 21941-902, Brazil
| | - Marcos C. Barcellos
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Avenida das Américas 28705, Rio de Janeiro 23020-470, Brazil; (M.C.B.); (V.G.M.d.O.); (R.B.S.); (P.A.d.M.C.)
| | - Victor G. M. de Oliveira
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Avenida das Américas 28705, Rio de Janeiro 23020-470, Brazil; (M.C.B.); (V.G.M.d.O.); (R.B.S.); (P.A.d.M.C.)
| | - Roberto B. Sousa
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Avenida das Américas 28705, Rio de Janeiro 23020-470, Brazil; (M.C.B.); (V.G.M.d.O.); (R.B.S.); (P.A.d.M.C.)
| | - Paulo A. de M. Cabral
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Avenida das Américas 28705, Rio de Janeiro 23020-470, Brazil; (M.C.B.); (V.G.M.d.O.); (R.B.S.); (P.A.d.M.C.)
| | - Kamil Kuča
- Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanskeho 62, 50003 Hradec Králové, Czech Republic
| | - Tanos C. C. França
- Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanskeho 62, 50003 Hradec Králové, Czech Republic
- Laboratory of Molecular Modelling Applied to Chemical and Biological Defense (LMACBD), Military Institute of Engineering (IME), Praça General Tibúrcio 80, Rio de Janeiro 22290-270, Brazil
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Basova NE, Rozengart EV. The Comparative Enzymological Characteristics of Cholinesterases in Nervous Tissues and Homogenates of Cotton Bollworm (Helicoverpa armigera Hbn.) Larvae. NEUROCHEM J+ 2019. [DOI: 10.1134/s1819712419010057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Cavalcante SFA, de Paula RL, Kitagawa DAS, Barcellos MC, Simas ABC, Granjeiro JM. Synthesis of reference compounds related to Chemical Weapons Convention for verification and drug development purposes – a Brazilian endeavour. ACTA ACUST UNITED AC 2018. [DOI: 10.1088/1742-6596/975/1/012020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Basova NE, Kormilitsyn BN, Perchenok AY, Rozengart EV, Saakov VS, Suvorov AA. Tetramethonium derivatives as reversible inhibitors of various cholinesterases. J EVOL BIOCHEM PHYS+ 2016. [DOI: 10.1134/s0022093016050021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Activities of Tetramethylene-Bis-Onium Reversible Cholinesterase Inhibitors as Influenced by the Nature of the Onium Atom. Pharm Chem J 2016. [DOI: 10.1007/s11094-016-1478-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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