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Minigaliyeva IA, Klinova SV, Sutunkova MP, Ryabova YV, Valamina IE, Shelomentsev IG, Shtin TN, Bushueva TV, Protsenko YL, Balakin AA, Lisin RV, Kuznetsov DA, Katsnelson BA, Toropova LV. On the Mechanisms of the Cardiotoxic Effect of Lead Oxide Nanoparticles. Cardiovasc Toxicol 2024; 24:49-61. [PMID: 38108959 PMCID: PMC10838250 DOI: 10.1007/s12012-023-09814-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 11/06/2023] [Indexed: 12/19/2023]
Abstract
Lead compounds are one of the most common pollutants of the workplace air and the environment. In the occupational setting, the sources of their emission, including in nanoscale form, are various technological processes associated with lead smelting and handling of non-ferrous metals and their alloys, the production of copper and batteries. Both lead poisoning and lead exposure without obvious signs of poisoning have a detrimental effect on the cardiovascular system. The purpose of this research was to investigate the mechanisms of the cardiotoxic effect of lead oxide nanoparticles (PbO NPs). The toxicological experiment involved male albino rats subchronically exposed to PbO NPs (49.6 ± 16.0 nm in size) instilled intraperitoneally in a suspension. We then assessed post-exposure hematological and biochemical parameters of blood and urine, histological and ultrastructural changes in cardiomyocytes, and non-invasively recorded electrocardiograms and blood pressure parameters in the rodents. Myocardial contractility was studied on isolated preparations of cardiac muscles. We established that PbO NPs induced oxidative stress and damage to the ultrastructure of cardiomyocytes, and decreased efficiency of the contractile function of the myocardium and blood pressure parameters. We also revealed such specific changes in the organism of the exposed rats as anemia, hypoxia, and hypocalcemia.
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Affiliation(s)
- Ilzira A Minigaliyeva
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russian Federation, 620014
- Laboratory of Stochastic Transport of Nanoparticles in Living Systems, Ural Federal University, Yekaterinburg, Russian Federation, 620000
| | - Svetlana V Klinova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russian Federation, 620014
| | - Marina P Sutunkova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russian Federation, 620014
| | - Yuliya V Ryabova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russian Federation, 620014
- Laboratory of Stochastic Transport of Nanoparticles in Living Systems, Ural Federal University, Yekaterinburg, Russian Federation, 620000
| | - Irene E Valamina
- Ural State Medical University, Yekaterinburg, Russian Federation, 620109
| | - Ivan G Shelomentsev
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russian Federation, 620014
| | - Tatiana N Shtin
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russian Federation, 620014
| | - Tatiana V Bushueva
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russian Federation, 620014
| | - Yuri L Protsenko
- Institute of Immunology and Physiology, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation, 620049
| | - Alexander A Balakin
- Institute of Immunology and Physiology, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation, 620049
| | - Ruslan V Lisin
- Institute of Immunology and Physiology, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation, 620049
| | - Daniil A Kuznetsov
- Institute of Immunology and Physiology, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation, 620049
| | - Boris A Katsnelson
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russian Federation, 620014
| | - Liubov V Toropova
- Laboratory of Mathematical Modeling of Physical and Chemical Processes in Multiphase Media, Ural Federal University, Yekaterinburg, Russian Federation, 620000.
- Otto-Schott-Institut für Materialforschung, Friedrich-Schiller-Universität-Jena, 07743, Jena, Germany.
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Balakin AA, Skobelev SA, Litvak AG. Stable few-cycle out-of-phase solitons in a rectangular multi-core fiber. Opt Lett 2023; 48:6208-6211. [PMID: 38039228 DOI: 10.1364/ol.503453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 10/26/2023] [Indexed: 12/03/2023]
Abstract
Stable out-of-phase soliton-like distributions of the wave field with few-cycle durations are found in fibers consisting of a rectangular lattice of weakly coupled cores. The stability of found distributions for durations larger than the critical value is shown analytically and numerically. Numerical simulation shows that the radiation of linear dispersive waves rather quickly transforms shorter pulses to the found solution with critical duration.
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Gerzen OP, Lisin RV, Balakin AA, Mukhlynina EA, Kuznetsov DA, Nikitina LV, Protsenko YL. Characteristics of the right atrial and right ventricular contractility in a model of monocrotaline-induced pulmonary arterial hypertension. J Muscle Res Cell Motil 2023; 44:299-309. [PMID: 37249732 DOI: 10.1007/s10974-023-09651-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 04/29/2023] [Indexed: 05/31/2023]
Abstract
Pulmonary arterial hypertension (PAH) leads to changes in the pump function of the heart and causes right-sided myocardial hypertrophy and heart failure. This study was the first to compare the contractile characteristics of the multicellular myocardial preparations of the right atrium (RA) and right ventricle (RV) of male rats from the control group (CON) and the group with monocrotaline (MCT)-induced hypertrophy at the molecular and multicellular levels. In both RA and RV in MCT-treated rats, the fraction of motile filaments and the maximum sliding velocity of actin and reconstituted thin filaments over myosin decreased, and the ratio of α-/β-myosin heavy chains (MHC) shifted towards β-MHC. In the RA strips and RV trabeculae, the maximum shortening velocity, the extent of muscle shortening, the amplitude of isometric stress, the amount of work decreased. PAH leads to a greater drop in right atrial contractility than that of the ventricle.
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Affiliation(s)
- Oksana P Gerzen
- Institute of Immunology and Physiology, Ural Branch of Russian Academy of Sciences, 106 Pervomayskaya st, Yekaterinburg, 620049, Russian Federation
| | - Ruslan V Lisin
- Institute of Immunology and Physiology, Ural Branch of Russian Academy of Sciences, 106 Pervomayskaya st, Yekaterinburg, 620049, Russian Federation
| | - Alexander A Balakin
- Institute of Immunology and Physiology, Ural Branch of Russian Academy of Sciences, 106 Pervomayskaya st, Yekaterinburg, 620049, Russian Federation.
| | - Elena A Mukhlynina
- Institute of Immunology and Physiology, Ural Branch of Russian Academy of Sciences, 106 Pervomayskaya st, Yekaterinburg, 620049, Russian Federation
| | - Daniil A Kuznetsov
- Institute of Immunology and Physiology, Ural Branch of Russian Academy of Sciences, 106 Pervomayskaya st, Yekaterinburg, 620049, Russian Federation
| | - Larisa V Nikitina
- Institute of Immunology and Physiology, Ural Branch of Russian Academy of Sciences, 106 Pervomayskaya st, Yekaterinburg, 620049, Russian Federation
| | - Yuri L Protsenko
- Institute of Immunology and Physiology, Ural Branch of Russian Academy of Sciences, 106 Pervomayskaya st, Yekaterinburg, 620049, Russian Federation
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Balakin AA, Skobelev SA, Litvak AG. Laser pulse cutoff at nonlinear reflection due to Raman backscattering in plasma. Opt Lett 2022; 47:6261-6264. [PMID: 37219222 DOI: 10.1364/ol.477494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 11/08/2022] [Indexed: 05/24/2023]
Abstract
A method for generating subrelativistic laser pulses with a sharp leading edge is proposed, which is based on Raman backscattering of an intense short pump pulse by a counter-propagating long low-frequency pulse propagating in a thin plasma layer. A thin plasma layer serves both to attenuate parasitic effects and to effectively reflect the central part of the pump pulse when the field amplitude exceeds the threshold value. A prepulse with a lower field amplitude passes through the plasma almost without scattering. This method works for subrelativistic laser pulses with durations up to 100 fs. The contrast of the leading edge of the laser pulse is determined by the seed pulse amplitude.
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Klinova SV, Minigalieva IA, Protsenko YL, Sutunkova MP, Gurvich VB, Ryabova JV, Valamina IE, Gerzen OP, Nabiev SR, Balakin AA, Lookin ON, Lisin RV, Kuznetsov DA, Privalova LI, Panov VG, Katsnelson LB, Nikitina LV, Katsnelson BA. Changes in the Cardiotoxic Effects of Lead Intoxication in Rats Induced by Muscular Exercise. Int J Mol Sci 2022; 23:ijms23084417. [PMID: 35457235 PMCID: PMC9029617 DOI: 10.3390/ijms23084417] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 04/12/2022] [Accepted: 04/13/2022] [Indexed: 11/17/2022] Open
Abstract
Exposure to lead is associated with an increased risk of cardiovascular diseases. Outbred white male rats were injected with lead acetate intraperitoneally three times a week and/or were forced to run at a speed of 25 m/min for 10 min 5 days a week. We performed noninvasive recording of arterial pressure, electrocardiogram and breathing parameters, and assessed some biochemical characteristics. Electrophoresis in polyacrylamide gel was used to determine the ratio of myosin heavy chains. An in vitro motility assay was employed to measure the sliding velocity of regulated thin filaments on myosin. Isolated multicellular preparations of the right ventricle myocardium were used to study contractility in isometric and physiological modes of contraction. Exercise under lead intoxication normalized the level of calcium and activity of the angiotensin-converting enzyme in the blood serum, normalized the isoelectric line voltage and T-wave amplitude on the electrocardiogram, increased the level of creatine kinase-MB and reduced the inspiratory rate. Additionally, the maximum sliding velocity and the myosin heavy chain ratio were partly normalized. The effect of exercise under lead intoxication on myocardial contractility was found to be variable. In toto, muscular loading was found to attenuate the effects of lead intoxication, as judged by the indicators of the cardiovascular system.
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Affiliation(s)
- Svetlana V. Klinova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
| | - Ilzira A. Minigalieva
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
| | - Yuri L. Protsenko
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Marina P. Sutunkova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
| | - Vladimir B. Gurvich
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
| | - Julia V. Ryabova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
| | - Irene E. Valamina
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
| | - Oksana P. Gerzen
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Salavat R. Nabiev
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Alexander A. Balakin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Oleg N. Lookin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Ruslan V. Lisin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Daniil A. Kuznetsov
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Larisa I. Privalova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
| | - Vladimir G. Panov
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
- Institute of Industrial Ecology, The Urals Branch of the Russian Academy of Sciences, 620049 Ekaterinburg, Russia
| | - Leonid B. Katsnelson
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Larisa V. Nikitina
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Boris A. Katsnelson
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
- Correspondence: ; Tel.: +7-343-253-04-21 or +7-922-126-30-90; Fax: +7-343-3717-740
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Klinova SV, Katsnelson BA, Minigalieva IA, Gerzen OP, Balakin AA, Lisin RV, Butova KA, Nabiev SR, Lookin ON, Katsnelson LB, Privalova LI, Kuznetsov DA, Shur VY, Shishkina EV, Makeev OH, Valamina IE, Panov VG, Sutunkova MP, Nikitina LV, Protsenko YL. Cardioinotropic Effects in Subchronic Intoxication of Rats with Lead and/or Cadmium Oxide Nanoparticles. Int J Mol Sci 2021; 22:ijms22073466. [PMID: 33801669 PMCID: PMC8036427 DOI: 10.3390/ijms22073466] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 03/23/2021] [Accepted: 03/24/2021] [Indexed: 01/31/2023] Open
Abstract
Subchronic intoxication was induced in outbred male rats by repeated intraperitoneal injections with lead oxide (PbO) and/or cadmium oxide (CdO) nanoparticles (NPs) 3 times a week during 6 weeks for the purpose of examining its effects on the contractile characteristics of isolated right ventricle trabeculae and papillary muscles in isometric and afterload contractions. Isolated and combined intoxication with these NPs was observed to reduce the mechanical work produced by both types of myocardial preparation. Using the in vitro motility assay, we showed that the sliding velocity of regulated thin filaments drops under both isolated and combined intoxication with CdO–NP and PbO–NP. These results correlate with a shift in the expression of myosin heavy chain (MHC) isoforms towards slowly cycling β–MHC. The type of CdO–NP + PbO–NP combined cardiotoxicity depends on the effect of the toxic impact, the extent of this effect, the ratio of toxicant doses, and the degree of stretching of cardiomyocytes and muscle type studied. Some indices of combined Pb–NP and CdO–NP cardiotoxicity and general toxicity (genotoxicity included) became fully or partly normalized if intoxication developed against background administration of a bioprotective complex.
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Affiliation(s)
- Svetlana V. Klinova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (L.I.P.); (V.G.P.); (M.P.S.)
| | - Boris A. Katsnelson
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (L.I.P.); (V.G.P.); (M.P.S.)
- Correspondence: ; Tel.: +7-343-253-04-21; Fax: +7-343-3717-740; Cell: +7-922-126-30-90
| | - Ilzira A. Minigalieva
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (L.I.P.); (V.G.P.); (M.P.S.)
| | - Oksana P. Gerzen
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Alexander A. Balakin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Ruslan V. Lisin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Ksenia A. Butova
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Salavat R. Nabiev
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Oleg N. Lookin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Leonid B. Katsnelson
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Larisa I. Privalova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (L.I.P.); (V.G.P.); (M.P.S.)
| | - Daniil A. Kuznetsov
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Vladimir Ya. Shur
- School of Natural Sciences and Mathematics, The Ural Federal University, 620002 Ekaterinburg, Russia; (V.Y.S.); (E.V.S.)
| | - Ekaterina V. Shishkina
- School of Natural Sciences and Mathematics, The Ural Federal University, 620002 Ekaterinburg, Russia; (V.Y.S.); (E.V.S.)
| | - Oleg H. Makeev
- The Central Research Laboratory, The Ural State Medical University, 620014 Yekaterinburg, Russia; (O.H.M.); (I.E.V.)
| | - Irene E. Valamina
- The Central Research Laboratory, The Ural State Medical University, 620014 Yekaterinburg, Russia; (O.H.M.); (I.E.V.)
| | - Vladimir G. Panov
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (L.I.P.); (V.G.P.); (M.P.S.)
- Institute of Industrial Ecology, The Urals Branch of the Russian Academy of Sciences, 620049 Ekaterinburg, Russia
| | - Marina P. Sutunkova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (L.I.P.); (V.G.P.); (M.P.S.)
| | - Larisa V. Nikitina
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Yuri L. Protsenko
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
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Balakin AA, Skobelev SA, Andrianov AV, Anashkina EA, Litvak AG. Coherent amplification of high-power laser radiation in multicore fibers from a rectangular array of cores. Opt Lett 2021; 46:246-249. [PMID: 33448998 DOI: 10.1364/ol.401914] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 12/08/2020] [Indexed: 06/12/2023]
Abstract
The coherent propagation and amplification of high-power laser radiation in a multicore fiber consisting of a square array of weakly bound cores are studied. Exact stable analytical solutions are found for the out-of-phase mode, which describes the coherent propagation of wave beams in such fibers. The analytical results are confirmed by direct numerical simulation of the wave equation. The stability conditions of the out-of-phase mode in the active medium are found.
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Katsnelson BA, Klinova SV, Gerzen OP, Balakin AA, Lookin ON, Lisin RV, Nabiev SR, Privalova LI, Minigalieva IA, Panov VG, Katsnelson LB, Nikitina LV, Kuznetsov DA, Protsenko YL. Force-velocity characteristics of isolated myocardium preparations from rats exposed to subchronic intoxication with lead and cadmium acting separately or in combination. Food Chem Toxicol 2020; 144:111641. [PMID: 32758638 DOI: 10.1016/j.fct.2020.111641] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 07/20/2020] [Indexed: 01/28/2023]
Abstract
This investigation continues our study of the effects of Pb-Cd poisoning on the heart, extending the enquiry from isometric to auxotonic contractions, thereby examining the effect on the ability of myocardial tissues to perform mechanical work. Different shifts were revealed in myocardial force-velocity relations following subchronic exposure of rats to lead acetate and cadmium chloride acting separately, in combination, or in combination with a bioprotective complex (BPC). The experiments were conducted on isolated preparations of trabecules and papillary muscles of the right ventricle in physiological loading conditions and on isolated heart muscle contractile proteins examined by the in vitro motility assay. The results of the latter correlate with the shifts in the ratio of cardiac myosin isoforms. The amount of work performed by the myocardium was calculated on the basis of the tension-shortening loop area and was found to be similar in the preparations from all experimental groups. This fact presumably reflects adaptive capacity of the myocardial function even when contractility is damaged due to the metallic intoxication of a moderate severity. Some characteristics of rat myocardium altered by the impact of lead-cadmium intoxication became fully or partly normalized if intoxication developed against background administration of a bioprotective complex (BPC). Together with previously reported results obtained in the isometric mode of contractility, all these results strengthen the scientific foundations of risk assessment and risk management projects in the occupational and environmental conditions characterized by human exposure to lead and/or cadmium.
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Affiliation(s)
- Boris A Katsnelson
- The Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia.
| | - Svetlana V Klinova
- The Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia
| | - Oksana P Gerzen
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Alexander A Balakin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Oleg N Lookin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Ruslan V Lisin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Salavat R Nabiev
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Larisa I Privalova
- The Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia
| | - Ilzira A Minigalieva
- The Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia
| | - Vladimir G Panov
- The Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia; The Institute of Industrial Ecology, The Urals Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Leonid B Katsnelson
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Larisa V Nikitina
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Daniil A Kuznetsov
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Yuri L Protsenko
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
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9
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Balakin AA, Skobelev SA, Andrianov AV, Anashkina EA, Litvak AG. Coherent propagation and amplification of intense laser pulses in hexagonal multicore fibers. Opt Lett 2020; 45:3224-3227. [PMID: 32538948 DOI: 10.1364/ol.392607] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 05/04/2020] [Indexed: 06/11/2023]
Abstract
Propagation and amplification of intense coherent laser pulses in a multicore fiber of 24 weakly coupled cores arranged in the form of seven close-packed hexagons were studied. Exact stable analytical solutions are found for the out-of-phase mode, which describes the coherent propagation of wave beams and temporal soliton solutions in such fibers. Their stability is demonstrated. The analytical results are confirmed by the direct numerical simulation of the wave equation.
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10
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Protsenko YL, Klinova SV, Gerzen OP, Privalova LI, Minigalieva IA, Balakin AA, Lookin ON, Lisin RV, Butova KA, Nabiev SR, Katsnelson LB, Nikitina LV, Katsnelson BA. Changes in rat myocardium contractility under subchronic intoxication with lead and cadmium salts administered alone or in combination. Toxicol Rep 2020; 7:433-442. [PMID: 32181144 PMCID: PMC7063142 DOI: 10.1016/j.toxrep.2020.03.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 02/28/2020] [Accepted: 03/01/2020] [Indexed: 12/13/2022] Open
Abstract
Subchronic intoxications induced in male rats by repeated intraperitoneal injections of lead acetate and cadmium chloride, administered either alone or in combination, are shown to affect the biochemical, cytological and morphometric parameters of blood, liver, heart and kidneys. The single twitch parameters of myocardial trabecular and papillary muscle preparations were measured in the isometric regime to identify changes in the heterometric (length-force) and chronoinotropic (frequency-force) contractility regulation systems. Differences in the responses of these systems in trabecules and papillary muscles to the above intoxications are shown. A number of myocardium mechanical characteristics changing in rats under the effect of a combined lead-cadmium intoxication and increased proportion of α-myosin heavy chains were observed to normalize fully or partially if such intoxication was induced against background administration of a proposed bioprotective complex. Based on the experimental results and literature data, some assumptions are suggested concerning the mechanisms of the cardiotoxic effects produced by lead and cadmium.
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Affiliation(s)
- Yuri L Protsenko
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Svetlana V Klinova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia
| | - Oksana P Gerzen
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Larisa I Privalova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia
| | - Ilzira A Minigalieva
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia
| | - Alexander A Balakin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Oleg N Lookin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia.,Ural Federal University, Yekaterinburg, Russia
| | - Ruslan V Lisin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Ksenya A Butova
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Salavat R Nabiev
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Leonid B Katsnelson
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia.,Ural Federal University, Yekaterinburg, Russia
| | - Larisa V Nikitina
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Boris A Katsnelson
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia
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11
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Balakin AA, Skobelev SA, Andrianov AV, Kalinin NA, Litvak AG. Laser pulse compression up to few-cycle durations in multicore fiber. Opt Lett 2019; 44:5085-5088. [PMID: 31613270 DOI: 10.1364/ol.44.005085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 09/23/2019] [Indexed: 06/10/2023]
Abstract
A mechanism for self-compression of laser pulses in a multicore fiber on the basis of nonlinear combining of radiation from many cores, surrounding the central core in a ring and its trapping into the central core in a chirp-free and pedestal-free soliton-like pulse, is proposed. It is shown that the compression ratio is weakly dependent on the energy and the number of cores in the fiber and approximately equal to 6 with an almost 100% energy efficiency. The compression ratio can be increased to 40 with an efficiency of more than 50% by using additional compression of longer pulses with approximately the same energy. The possibility of a 38-fold compression of a laser pulse to a duration of 15 fs with a pulse energy of 4 nJ in the fiber with realistic parameters was demonstrated numerically.
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12
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Protsenko YL, Katsnelson BA, Klinova SV, Lookin ON, Balakin AA, Nikitina LV, Gerzen OP, Nabiev SR, Minigalieva IA, Privalova LI, Gurvich VB, Sutunkova MP, Katsnelson LB. Further analysis of rat myocardium contractility changes associated with a subchronic lead intoxication. Food Chem Toxicol 2019; 125:233-241. [PMID: 30634013 DOI: 10.1016/j.fct.2018.12.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 12/06/2018] [Accepted: 12/29/2018] [Indexed: 10/27/2022]
Abstract
A moderate subchronic lead intoxication was observed in male rats after repeated intraperitoneal injections of lead acetate. Right ventricular trabeculae and papillary muscles were isolated for in vitro studying of the contraction-relaxation cycle under isotonic and physiological loading. The contractile function of the myocardium was also assessed by measuring the velocity of thin filament movement over myosin. Lead intoxication led in papillary muscles to a decrease in the maximal rate of isotonic shortening for all afterloads and a decrease in the thin filament sliding velocity. Papillary muscles from lead-exposed rats displayed marked changes in most of the main characteristics of afterload contraction-relaxation cycles, but in trabeculae these changes were less pronounced. The reported changes were attenuated to some extent in rats treated with a Ca-containing bioprotector. The amount of work produced by both types of heart muscle preparations was not changed by lead. Only in papillary muscles the load-dependent relaxation index was significantly increased in the lead-treated groups. Thus subchronic lead intoxication affects the peak rate of force development and relaxation properties of cardiac muscle contracting in isotonic/physiological regimes rather than the total amount of mechanical work, which may reflect adaptive changes in the myocardial function under decreased contractility.
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Affiliation(s)
- Yuri L Protsenko
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Boris A Katsnelson
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia.
| | - Svetlana V Klinova
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Oleg N Lookin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia; Ural Federal University, Ekaterinburg, Russia
| | - Alexander A Balakin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Larisa V Nikitina
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Oksana P Gerzen
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Salavat R Nabiev
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Ilzira A Minigalieva
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Larisa I Privalova
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Vladimir B Gurvich
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Marina P Sutunkova
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Leonid B Katsnelson
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia; Ural Federal University, Ekaterinburg, Russia
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13
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Protsenko YL, Katsnelson BA, Klinova SV, Lookin ON, Balakin AA, Nikitina LV, Gerzen OP, Minigalieva IA, Privalova LI, Gurvich VB, Sutunkova MP, Katsnelson LB. Effects of subchronic lead intoxication of rats on the myocardium contractility. Food Chem Toxicol 2018; 120:378-389. [PMID: 30036551 DOI: 10.1016/j.fct.2018.07.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 07/02/2018] [Accepted: 07/19/2018] [Indexed: 01/21/2023]
Abstract
Outbred male rats were repeatedly injected IP with sub-lethal doses of lead acetate 3 times a week during 5 weeks. They developed an explicit, even if moderate, lead intoxication characterized by typical hematological and some other features. The next day after the last injection the heart of each animal was excised, and the trabecules and papillary muscles from the right ventricle were used for modeling in vitro isometric (with varying starting length of the preparation) regimes of the contraction-relaxation cycle with different preloads. Several well-established parameters of this model were found changed compared with the preparations taken from the hearts of healthy control rats. Background in vivo calcium treatment attenuated both systemic and cardiotoxic effects of lead to an extent. We show for the first time that subchronic intoxication with lead caused myocardial preparations in a wide range of lengths to respond by a decrease in the time and speed parameters of the isometric contraction while maintaining its amplitude and by a decrease in the passive stiffness of trabecules. The responses of the various heart structures are outlined, and the isomyosin ratio is shown to have shifted towards the slow isoform. Mechanistic and toxicological inferences from the results are discussed.
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Affiliation(s)
- Yuri L Protsenko
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Boris A Katsnelson
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia.
| | - Svetlana V Klinova
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Oleg N Lookin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Alexander A Balakin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Larisa V Nikitina
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Oksana P Gerzen
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Ilzira A Minigalieva
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Larisa I Privalova
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Vladimir B Gurvich
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Marina P Sutunkova
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Leonid B Katsnelson
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
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14
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Protsenko YL, Balakin AA, Kuznetsov DA, Kursanov AG, Lisin RV, Mukhlynina EA, Lookin ON. Contractility of Right Ventricular Myocardium in Male and Female Rats during Physiological and Pathological Hypertrophy. Bull Exp Biol Med 2017; 162:303-305. [PMID: 28091901 DOI: 10.1007/s10517-017-3600-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Indexed: 10/20/2022]
Abstract
Sex differences in the morphogenesis and adaptation of the mechanisms controlling myocardium contractility during physiological and pathological hypertrophy of the right ventricle were demonstrated in mature rats. The study revealed sex-dependent effects of physiological and pathological cardiac hypertrophy on the coefficient of variation of the cardiomyocyte diameter, length-dependent control of the contractile force, and the maximum velocity of isotonic shortening.
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Affiliation(s)
- Yu L Protsenko
- Institute of Immunology and Physiology, Ural Division of Russian Academy of Sciences, Ekaterinburg, Russia
| | - A A Balakin
- Institute of Immunology and Physiology, Ural Division of Russian Academy of Sciences, Ekaterinburg, Russia
| | - D A Kuznetsov
- Institute of Immunology and Physiology, Ural Division of Russian Academy of Sciences, Ekaterinburg, Russia
| | - A G Kursanov
- Institute of Immunology and Physiology, Ural Division of Russian Academy of Sciences, Ekaterinburg, Russia.,B. N. Yeltsin Ural Federal University, Ekaterinburg, Russia
| | - R V Lisin
- Institute of Immunology and Physiology, Ural Division of Russian Academy of Sciences, Ekaterinburg, Russia.
| | - E A Mukhlynina
- Institute of Immunology and Physiology, Ural Division of Russian Academy of Sciences, Ekaterinburg, Russia.,B. N. Yeltsin Ural Federal University, Ekaterinburg, Russia
| | - O N Lookin
- Institute of Immunology and Physiology, Ural Division of Russian Academy of Sciences, Ekaterinburg, Russia.,B. N. Yeltsin Ural Federal University, Ekaterinburg, Russia
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15
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Balakin AA, Kuznetsov DA, Lisin RV, Protsenko IL. [Characteristics of load dependent relaxation of normal and hypertrophied myocardium in male and female rats]. Ross Fiziol Zh Im I M Sechenova 2014; 100:1038-1048. [PMID: 25697012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Under monocrotaline treatment of rat right ventricle myocardium preparations significant changes in morphometric indices for male, but not for female preparations are adduced as compared to the control group. Peculiarities of adaptation of mechanocalcium uncoupling mechanism, one of important regulation mechanisms of rat myocardial contractility, were first revealed. Myocardial pressure overload results in the increase of time to peak force without alteration of characteristic time of isometric tension, relaxation for male rats under myocardial hypertrophy compared with control group rats. In addition, the decrease of the load dependent relaxation index in the male rats was obtained. Characteristics of myocardial contractility of female rats have not significant changes as compared to the control group.
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16
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Markhasin VS, Balakin AA, Katsnelson LB, Konovalov P, Lookin ON, Protsenko Y, Solovyova O. Slow force response and auto-regulation of contractility in heterogeneous myocardium. Progress in Biophysics and Molecular Biology 2012; 110:305-18. [DOI: 10.1016/j.pbiomolbio.2012.08.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Accepted: 08/09/2012] [Indexed: 11/25/2022]
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17
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Kobelev AV, Smoliuk LT, Lukin ON, Balakin AA, Protsenko IL. [Modeling of steady-state and relaxation elastic properties of the papillary muscle at rest]. Biofizika 2011; 56:534-542. [PMID: 21786708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The biomechanical modeling of a papillary muscle preparation as an adequate object for studying the properties of the myocardial tissue under uniaxial stretching has been performed. The steady-state and relaxation tests of the papillary muscle of laboratory animals (rabbit and rat) have been conducted in normal conditions and after the maceration of intracellular structures with high ionic strength solution. It has been shown that the main contribution to the viscoelastic properties in the initial range of physiological deformations is made by the connective tissue skeleton, whereas under large physiological deformations, by intracellular structures.
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18
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Protsenko IL, Kobelev AV, Lukin ON, Balakin AA, Smoliuk LT. [Viscoelastic properties of isolated papillary muscle: contributions of connective tissue skeleton and intracellular matrix]. Ross Fiziol Zh Im I M Sechenova 2009; 95:716-725. [PMID: 19803458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Peculiarities of viscoelastic behavior of rabbit papillary muscle in passive state are studied by transversal versus longitudinal deformation curves, stress-strain and hysteresis curves, and stress relaxation curves under ramp stretching. The papillary muscle was chosen because of mostly longitudinal orientation of fibers and its elongated shape, which both make it as an appropriate model for uniaxial tests. The problem of evaluation of connective tissue protein structures and intracellular matrix contribution into the properties under consideration is solved by using the maceration method to remove intracellular structures. The different contribution of intracellular and extracellular protein features into total properties of a papillary muscle leads to nonlinearity of myocardial viscoelastic properties, such as the increase of differential elastic module and relaxation time with deformation.
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Lookin ON, Gur'ev VY, Routkevitch SM, Balakin AA. Interaction of a cardiac muscle and its mathematical model in hybrid duplex. J Mol Cell Cardiol 2007. [DOI: 10.1016/j.yjmcc.2007.03.256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Lookin ON, Gur'ev VY, Routkevitch SM, Balakin AA. WITHDRAWN: Interaction of a cardiac muscle and its mathematical model in hybrid duplex. J Mol Cell Cardiol 2007. [DOI: 10.1016/j.yjmcc.2007.03.860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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21
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Protsenko YL, Routkevitch SM, Gur'ev VY, Katsnelson LB, Solovyova O, Lookin ON, Balakin AA, Kohl P, Markhasin VS. Hybrid duplex: a novel method to study the contractile function of heterogeneous myocardium. Am J Physiol Heart Circ Physiol 2005; 289:H2733-46. [PMID: 16040718 DOI: 10.1152/ajpheart.00306.2005] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In an earlier study, we experimentally mimicked the effects of mechanical interaction between different regions of the ventricular wall by allowing pairs of independently maintained cardiac muscle fibers to interact mechanically in series or in parallel. This simple physiological model of heterogeneous myocardium, which has been termed “duplex,” has provided new insight into basic effects of cardiac electromechanical heterogeneity. Here, we present a novel “hybrid duplex,” where one of the elements is an isolated cardiac muscle and the other a “virtual cardiac muscle.” The virtual muscle is represented by a computational model of cardiomyocyte electromechanical activity. We present in detail the computer-based digital control system that governs the mechanical interaction between virtual and biological muscle, the software used for data analysis, and working implementations of the model. Advantages of the hybrid duplex method are discussed, and experimental recordings are presented for illustration and as proof of the principle.
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Affiliation(s)
- Yuri L Protsenko
- Institute of Immunology and Physiology, Ural Branch of the Russian Academy of Sciences, Rm. 327, 91 Pervomayskaya ul., Ekaterinburg 620219, Russia.
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22
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Balakin AA, Fraiman GM, Fisch NJ, Suckewer S. Backward Raman amplification in a partially ionized gas. Phys Rev E Stat Nonlin Soft Matter Phys 2005; 72:036401. [PMID: 16241573 DOI: 10.1103/physreve.72.036401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2005] [Indexed: 05/05/2023]
Abstract
Compressing laser pulses to extremely high intensities through backward Raman amplification might be accomplished in a plasma medium. While the theory is relatively straightforward for homogeneous fully ionized plasma, a number of important effects enter when the plasma is not fully ionized. In particular, when a mixture of gases is employed to accomplish the coupling, there can be several thresholds for incremental ionization. The refraction of both the pump and the seed is then strongly affected by the plasma ionization. Moreover, in the case of Raman backscattering in partially ionized plasma, the degree of plasma ionization is particularly sensitive to the counterpropagating geometry. This idea is examined in light of data for a recent experiment on a Raman amplifier.
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Affiliation(s)
- A A Balakin
- Institute of Applied Physics, RAS, Nizhnii Novgorod, Russia 603950
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23
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Markhasin VS, Balakin AA, Gur'ev VI, Lukin ON, Konovalov PV, Protsenko IL, Solov'ev OE. [Electromechanical heterogeneity of the myocardium]. Ross Fiziol Zh Im I M Sechenova 2004; 90:1060-77. [PMID: 15552371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
Herein we discuss modem data showing that ventricle's working myocardium is highly heterogeneous. Significant transmural differences in electrophysiological and biomechanical properties of cardiomyocytes are reviewed. The reviewed evidence of myocardial heterogeneity constitutes the basis for modem assessment of segmental kinetics of different regions in intact heart. We used muscle duplexes as condensed models of a heterogeneous myocardial system. Experimental data, presented here were obtained both in biological duplexes formed by isolated myocardial preparations and in mathematical models of muscle duplexes. We showed that specific functional heterogeneity of cardiomyocytes, related to their excitation sequence, allowed the myocardium to optimise its contractile function and smooth dispersion of repolarisation.
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24
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Lukin LV, Balakin AA. Thermalization of low energy electrons in liquid methylcyclohexane studied by the photoassisted ion pair separation technique. Chem Phys 2001. [DOI: 10.1016/s0301-0104(01)00260-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Balakin AA, Dodonov AF, Novikova LI, Talrose VL. The solvent shells of cluster ions produced by direct electric field extraction from glycerol/water mixtures. Rapid Commun Mass Spectrom 2001; 15:489-495. [PMID: 11268133 DOI: 10.1002/rcm.252] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Electric field extraction of gaseous negative ions directly from water/glycerol solutions by use of a track membrane technique was investigated. The distributions of numbers of solvent molecules in the extracted cluster ions for different compounds were obtained. It is shown that the extraction mechanism is a direct field-stimulated evaporation of cluster ions from liquid, with a subsequent loss of several solvent molecules in the vacuum. For relatively simple ions a good correspondence of results was obtained with a continuous medium model. It was found that the number of solvent molecules in a cluster shell, for more complicated ions such as amino acids, is significantly greater than that for halide ions or ions of simple organic acids. An increase in the number of solvent molecules in the case of amino acid negative ions is rationalized in terms of the existence of several charged groups, each of which gives an additional contribution to the cluster shell.
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Affiliation(s)
- A A Balakin
- Institute of Energy Problems of Chemical Physics (Branch), Russian Academy of Sciences, 142432 Chernogolovka, Moscow region, Russia.
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Affiliation(s)
- Alexander A. Balakin
- Department of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Vladimir V. Gridin
- Department of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Israel Schechter
- Department of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
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