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Pogorelov AG, Pogorelova VN. Dynamics of cell volume in early mouse embryos subjected to hypotonic shock. Biophysics (Nagoya-shi) 2009. [DOI: 10.1134/s0006350909030130] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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27
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Pogorelov AG, Pogorelova VN. [Osmotic behavior of mouse embryonic cells subjected to hypotonic shock]. BIOFIZIKA 2009; 54:482-487. [PMID: 19569509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Osmotic adaptation in a blastomere of mouse embryo has been studied by the direct measurement of the cell volume using laser scanning microscopy microtomography followed by quantitative 3D reconstruction. Embryonic cells subjected to hypotonic shock first swelled and then returned to the initial size. At the beginning of osmotic stress, the swelling occurred by the van't Hoff equation with the water permeability coefficient (L(p)) of 0.4 micro x min(-1) atm(-1). The phase of the regulatory volume decrease was not abolished by Na+/K(+)-ATPase inhibition.
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Pogorelov AG. Effect of acute hypoxia on the concentrations of potassium and phosphorus in the cardiomyocyte of a pregnant animal during early organogenesis. Bull Exp Biol Med 2009; 145:604-5. [PMID: 19145292 DOI: 10.1007/s10517-008-0151-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The concentrations of potassium and phosphorus in the cardiomyocyte cytoplasm of the Wistar rat were measured by means of electron probe microanalysis. Pregnancy was accompanied by a decrease in cytoplasmic phosphorus concentration and an increase in cytoplasmic potassium concentration. Acute hypoxia modified the concentrations of these elements in the cytoplasm.
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Pogorelov AG. Electron probe microanalysis of the elemental (K, P) content in the cytoplasm of cardiomyocyte of pregnant rat after an acute hypoxia incident. Biophysics (Nagoya-shi) 2008. [DOI: 10.1134/s0006350908060171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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30
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Pogorelov AG. [Electron probe microanalysis of the potassium and phosphorus content in cytoplasm of cardiomyocytes of pregnant rats after an acute hypoxia incident]. BIOFIZIKA 2008; 53:1019-1024. [PMID: 19137687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The concentration of the elements (K, P) in the cytoplasm of rat (Wistar) cardiomyocytes has been determined by the electron probe analysis. The intracellular content of potassium and phosphorus was determined in early organogenesis and in unfertilized animals. In pregnant animals, a decrease in the cytoplasmic concentration of phosphorus and an increase in the concentration of potassium were registered. It was shown that the acute hypobaric hypoxia changes the content of both elements in the cytoplasm. The data obtained are discussed in terms of the activation of the ion transport system, which is aimed at compensating the cellular acidosis and lactosis induced by the development of hypoxic deenergization in pregnant animals.
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Maevsky EI, Peskov AB, Uchitel ML, Pogorelov AG, Saharova NY, Vihlyantseva EF, Bogdanova LA, Kondrashova MN. A succinate-based composition reverses menopausal symptoms without sex hormone replacement therapy. ADVANCES IN GERONTOLOGY = USPEKHI GERONTOLOGII 2008; 21:298-305. [PMID: 18942377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Menopausal transition is often accompanied by a variety of adverse pathological symptoms, currently treated with hormone replacement therapy, which is associated with a number of health risks. This report investigated the role of a food supplement--a composition of energy-exchange metabolites, with succinate as the main component--for treating menopausal syndrome. We studied the impact of a 4-week succinate-based food composition (SBC) treatment on the estral cycle, and bone mass and calcium content of aging mice. The impact of SBC on hormone levels and on the progression of several neurovegetative and psycho-emotional symptoms was further investigated in a randomized, double-blind, placebo-controlled clinical study of early menopausal women. Data were collected from questionnaires, Kupperman index scores, Spielberger-Hanin tests, and blood analysis of hormone levels taken at baseline and throughout the 5-week study. A "rejuvenating" effect of SBC on menopausal animals was observed, expressed as restoration of the estral cycle and an increase in the weight and calcium content of bone tissue. Furthermore, in the randomized, placebo-controlled clinical study in menopausal women, SBC-based monotherapy significantly lowered most subjectively evaluated characteristics of menopausal syndrome and increased blood serum levels of estradiol fourfold. This monotherapy also alleviated symptoms of some neurovegetative and psycho-emotional disorders, such as hot flushes, headache, and anxiety. Succinate-based therapy alleviated many biochemical symptoms of menopause in aging mice and early menopausal women, as well as neurovegetative and psycho-emotional disorders in women. Succinate-based therapy appeared to be free of adverse side effects.
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Rusakov AV, Medvinsky AB, Pogorelov AG. Circulation of excitation waves in a model medium containing unexcitable obstacles. Biophysics (Nagoya-shi) 2007. [DOI: 10.1134/s0006350907030153] [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] Open
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33
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Rusakov AV, Medvinskiĭ AB, Pogorelov AG. [Circulation of excitation waves in a model medium containing unexcitable obstacles]. BIOFIZIKA 2007; 52:555-9. [PMID: 17633548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The 3D structure of the heart tissue of Wistar rats from different age groups has been reconstructed by light microscopy of consecutive series of semithin sections. At the histological resolution level, connective tissue segments in the myocardium of aged (18 months) animals were found, while in the myocardium of young (2 months) animals no connective tissue segments were observed. A mathematical model and the results of the 3D reconstruction were used to simulate the formation of excitation wave circulation in the myocardium. The values of conductivity and the excitability threshold, and the pulse frequency rates were found at which the disturbances of the heart rhythm resulting from the excitation wave circulation are predicted by the mathematical modeling.
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Gol'dshteĭn DV, Pogorelova VN, Pogorelov AG. [Cytochalasin B induced changes in cytoplasmic Na+/K+ balance in 2-cell mouse embryo]. TSITOLOGIIA 2007; 49:680-684. [PMID: 17926564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
This work was performed to study changes in intracellular elemental (Na/K) concentrations caused by Cytochalasin B in two-cell mouse embryo using Electron Probe Microanalysis. The presence of Cytochalasin B is required to transfer a somatic cell nuclear into an early embryo cell. The direct effect of this chemical is cytoskeleton transformation, which would be able to cause the increase of potassium channel activity resulting in cytoplasmic Na/K imbalance. In our study Cytochalasin B was shown to decrease the intracellular sodium concentration. The Na/K balance in the cytoplasm of mouse embryos reverted to its intact level after treatment them with Cytochalasin B free Dulbecco's solution. Possible mechanisms responsible for the changes in the intracellular sodium concentration observed in the embryo cells are discussed.
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Pogorelov AG, Gol'dstein DV. Electron probe microanalysis of cytoplasmic concentrations of elements in a single cell in culture and suspension. Bull Exp Biol Med 2006; 141:513-9. [PMID: 17152383 DOI: 10.1007/s10517-006-0211-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Electron probe microanalysis is a method for evaluation of concentrations of elements at the subcellular level, effective in studies of an individual cell in culture or suspension. Intracellular concentrations of cytoplasmic ions (K+, Na+, Cl-) most rapidly and markedly reacting to changes is an adequate criterion for evaluating the traumatism of manipulations used in cell technologies. Using electron probe microanalysis it will be possible to develop special procedures (for example, therapeutic cloning) for reprogramming or cryopreservation, when intactness of intracellular balance of element serves as the criterion of cell status.
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Pogorelov AG, Rusakov AV, Pogorelova VN. Cytoplasmic potassium-sodium balance in the cardiac muscle cell of young and old rats in oxygen-substrate deficiency. Biophysics (Nagoya-shi) 2006. [DOI: 10.1134/s0006350906050149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Pogorelov AG, Rusakov AV, Pogorelova VN. [Cytoplasmic K/Na balance in heart muscle cells of young and old rats under oxygen and substrate deficiency]. BIOFIZIKA 2006; 51:852-8. [PMID: 17131824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Age-related changes in the content of the major cellular cations of potassium and sodium in heart muscle cells of Wistar rats have been studied. The cytoplasmic concentration of potassium and sodium was determined by the electron probe microanalysis. The results revealed differences in both the concentration of the elements in young and old control animals and the responses of a cardiomyocyte to the state of acute hypoxic deenergization modelled on a perfused heart. The data are consistent with the hypothesis about the presence of genetically-related age changes in the conductance of potassium channels, which in old animals are realized against the background of deficient supply of tissues with oxygen and substrate.
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Gol'dshtein DV, Rzhaninova AA, Pogorelov AG. Electron probe microanalysis of potassium and sodium in clonogenic culture of human neural stem cells. Bull Exp Biol Med 2005; 140:301-3. [PMID: 16307042 DOI: 10.1007/s10517-005-0473-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The mean potassium and sodium concentrations and distribution of potassium in clonogenic culture of human neural stem cells (neurosphere) were estimated by means of electron probe microanalysis. High sodium concentration was typical of undifferentiated cells. Potassium was irregularly distributed in the test structure. Our results confirm published data on heterogeneous morphological structure of neurospheres.
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Pogorelov AG, Goldstein DV, Smolyaninova EI, Sakharova NY. Electron probe microanalysis of intracellular potassium concentration in early mouse embryos. DOKL BIOCHEM BIOPHYS 2005; 400:38-9. [PMID: 15846980 DOI: 10.1007/s10628-005-0027-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Pogorelov AG, Smol'ianinova EI, Pogorelova VN, Gol'dshteĭn DV. [Electron probe microanalysis of potassium and phosphorus in mouse oocytes and zygotes]. ONTOGENEZ 2005; 36:123-7. [PMID: 15859478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Intracellular concentrations of potassium and phosphorus were determined by Electron Probe Microanalysis in mouse mature oocytes and zygotes. The oocytes were characterized by insignificant variations in the concentrations of these elements in the cytoplasm: 60 +/- 4 and 103 +/- 6 mM, respectively. In zygotes, on the contrary, significant variations were observed: 64 +/- 16 and 84 +/- 14 mM, respectively. Changes in the potassium homeostasis during the first cell cycle have been discussed.
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Gol'dshtein DV, Vikhlyantseva EV, Sakharova NK, Maevskii EI, Pogorelov AG, Uchitel' ML. Histological method for evaluation of the efficiency of Enerlit-Clima. Bull Exp Biol Med 2005; 138:205-6. [PMID: 15662473 DOI: 10.1023/b:bebm.0000048390.58193.2a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
We propose a method of evaluation of anticlimacteric efficiency of a drug by its effect on the estrous cycle. The study was carried out on 9-month-old mice with retained, but notably reduced reproductive function. Analysis of the cell components of the estrous cycle was carried out on histological preparations of vaginal smears.
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Pogorelov AG, Kantor GM, Sakharova NI, Smirnov AA, Aksirov AM, Chaĭlakhian LM. [3-D reconstruction of early preimplantation mouse embryo]. TSITOLOGIIA 2005; 47:686-91. [PMID: 16706211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Method of 3-D reconstruction approaches for early mouse embryo in preimplantation stages was modified. The developed technique is based on application of light microscopy of serial thin sections and well known soft operating. The designed method enabled us 1) to get serial sections of a single mouse embryo; 2) to create an orthogonal system independent on the sample for orientation of virtual sections. The adequacy of 3-DR protocol was checked on reconstruction of air bubbles embedded in epoxy resin as a model of sphere.
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Gol'dshtein DV, Smolyaninova EI, Pogorelov AG. Potassium assay in blastomere of two-cell mouse embryo after equilibration and washing from cryoprotector. Bull Exp Biol Med 2004; 138:40-1. [PMID: 15514718 DOI: 10.1023/b:bebm.0000046933.90918.1d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The need for effective methods of cryopreservation of early mammalian embryos necessitates the study of the mechanisms of blastomere adaptation to the equilibration procedure and subsequent washing from the cryoprotector. The osmotic effects during these procedures can cause electrolyte imbalance in embryonic cells. Intracellular potassium concentrations at the stage of two-blastomere mouse embryo were studied by electron probe microanalysis.
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Gol'dshtein DV, Pogorelov AG, Chailakhyan TA, Smirnov AA. Changes in intracellular potassium concentration in a one-cell mouse embryo after enucleation. Bull Exp Biol Med 2004; 138:243-4. [PMID: 15665913 DOI: 10.1007/s10517-005-0010-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Comparative analysis of potassium concentrations in the cytoplasm of intact and enucleated one-cell mouse embryos of showed that microsurgical manipulations during collection of pronuclei disordered potassium homeostasis in the embryonic cell.
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Pogorelov AG, Kantor GM, Karnaukhov AV, Sakharova NY, Chailakhyan LM. The use of light microscopy for three-dimensional reconstruction of early embryos of mammals. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2004; 395:146-8. [PMID: 15255148 DOI: 10.1023/b:dobs.0000025243.36917.c6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Pogorelov AG, Pogorelova VN, Khrenova EV, Dubrovkin MI, Demin IP, Goldstein DV. The Role of “Dormant” Mechanisms in Regulation of K/Na Balance in the Rat Cardiac Muscle Cell during Hypoxia. J EVOL BIOCHEM PHYS+ 2004. [DOI: 10.1023/b:joey.0000046542.80513.a0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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47
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Gol’dshtein DV, Smol’yaninova EI, Pogorelov AG. Potassium assay in blastomere of two-cell mouse embryo after equilibration and washing from cryoprotector. Bull Exp Biol Med 2004. [DOI: 10.1007/bf02694469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Pogorelov AG, Pogorelova VN, Khrenova EV, Dubrovkin MI, Demin IP. ["Sleeping" mechanisms in the regulation of K/Na homeostasis in rat cardiomyocytes in hypoxia]. ZHURNAL EVOLIUTSIONNOI BIOKHIMII I FIZIOLOGII 2004; 40:353-8. [PMID: 15481375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
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Gol'dshtein DV, Zakaryan AA, Kuz'min VS, Pogorelov AG, Sukhova GS, Khrenova EV. Preclinical Study of the Effect of Cardiotropic Agents on Isolated Heart. Bull Exp Biol Med 2004; 137:566-7. [PMID: 15455086 DOI: 10.1023/b:bebm.0000042713.18766.4d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Direct effects of cardiotropic preparations on the hearts isolated from Wistar rats were examined. Deenergization of cardiomyocytes was modeled under conditions of hypoxic perfusion. Recovery of cardiac function during reperfusion was assessed by changes in the heart rate and contraction amplitude.
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Pogorelov AG, Pogorelova VN, Dubrovkin MI, Demin IP, Khrenova EV. [Activation of specific membrane mechanisms in the myocardium cells on early stages of ischemia]. BIOFIZIKA 2002; 47:744-51. [PMID: 12298216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
Electron probe microanalysis was employed to determine the elemental concentration (K,Na,Cl) in a myocyte on cryosections of the papillary muscle of the isolated rat (Wistar) heart. Protocols of global ischemia and ischemic conditions under glucose-free anoxic perfusion were applied. It was shown that global ischemia induces potassium deficiency (94 +/- 2 mM) in the myocyte and an increase in the level of sodium (72 +/- 4 mM) and chlorine (42 +/- 1 mM) in the cytoplasm compared with intact cell (122 +/- 2; 36 +/- 1; 24 +/- 1 mM). Glucose-free anoxic perfusion leads to a smooth fall of potassium concentration in the cell up to 54 +/- 2 mM with the retention of intracellular sodium (40 +/- 1 mM) and chlorine (26 +/- 1 mM) level. The present finding suggest that, in early ischemia, specific membrane mechanisms of ion transport are activated. Among these are KNa channel, Hi(+)-Nao+ exchange, KATP channel, lactate transport from the cell, associated either with potassium efflux to the extracellular space or chlorine influx into the myocyte. It is assumed that Na/K-ATPase is also activated under ischemic conditions.
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