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1.
Dokl Biochem Biophys ; 476(1): 326-328, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-29101746

RESUMO

Quantitative proteomic analysis of 50 blood plasma samples of healthy volunteers who underwent a comprehensive medical examination and were found eligible for space flights was performed. As a result of directed mass spectrometric analysis, signals for 128 proteins, which accounted for nearly 40% of the total number of chromosome 13 gene products, were detected. The analysis of interindividual variation of concentrations of chromosome 13 proteins showed the presence of a pool comprising 41 proteins with a low variation (CV < 30%), which can potentially be used as biomarkers.


Assuntos
Proteínas Sanguíneas/genética , Proteínas Sanguíneas/metabolismo , Cromossomos Humanos Par 13/genética , Proteômica , Voluntários Saudáveis , Humanos
2.
Fiziol Cheloveka ; 41(4): 132-6, 2015.
Artigo em Russo | MEDLINE | ID: mdl-26485798

RESUMO

In this study the effect of factors of hermetic chamber with modified gas medium on the hemostasis system is analyzed in order to estimate and to compare different diving breathing gases. The parameters characterizing pro-, anticoagulant as well as fibrinolytic components of hemostasis were determined using clotting, chromogenic and immunological methods. The applied exposure did not affect the activity and regulatory potential of hemostasis significantly; however, the nitrogen-oxygen and argon-oxygen diving gases have a different effect on the hemostasis functioning, especially in the recovery period.


Assuntos
Argônio/administração & dosagem , Hemostasia/fisiologia , Hipóxia/sangue , Nitrogênio/administração & dosagem , Oxigênio/administração & dosagem , Adaptação Fisiológica , Adulto , Argônio/metabolismo , Voluntários Saudáveis , Humanos , Masculino , Nitrogênio/metabolismo , Oxigênio/metabolismo , Consumo de Oxigênio/fisiologia , Adulto Jovem
3.
Aviakosm Ekolog Med ; 49(3): 19-24, 2015.
Artigo em Russo | MEDLINE | ID: mdl-26292421

RESUMO

The paper is devoted to the hemostasis studies in the course of long-term (520 d) isolation in an airtight chamber. Measured parameters included activated partial thromboplastin time (APTT), international normalized ratio (INR), thrombin time (TT); concentrations of fibrinogen (FBG), plasminogen (PG), Willebrand factor (WF), tissue factor pathway inhibitor (TFPI), and tissue plasminogen activator (TPA), thrombomodulin (TM); activities of the coagulation cascade factors (II, V, VII, X, VIII, IX, XI, XII), antithrombin III (ATIII), protein C (PC), C1-inhibitor (C1), α2-antiplasmin (AP), TPA and TFPI. The investigation revealed a diversity of changes in the plasma fibrinogen concentration, slower blood coagulation in the intrinsic pathway and the final stage, and a relative rise in the activities of ATIII and PC-inhibited factors. The rest parameters showed different trends.


Assuntos
Hemostasia/fisiologia , Voo Espacial , Astronave , Adulto , Voluntários Saudáveis , Humanos , Masculino
4.
Aviakosm Ekolog Med ; 49(3): 56-60, 2015.
Artigo em Russo | MEDLINE | ID: mdl-26292427

RESUMO

In an experiment with space flight simulation, atomic emission spectral analysis with inductively coupled argon plasma was employed to measure iron, zinc, stable strontium and lithium in blood serum and its ultrafiltered fraction, and excretion with daily urine and hair. Monitoring of serum iron and its ultraviolet fraction showed good balance of these parameters in all periods of the experiment. Blood serum was found to contain exclusively iron bound with protein carriers. In the experiment, serum zinc was distinctively dependent on the nutrient status. Stable strontium excretion with daily urine can be a biological indicator of its homeostasis. The experiment factors had no effect on the lithium form in serum, i.e. lithium was invariably present in the ionized form and in quantities equal to ultrafiltered lithium in all blood samples in all periods of the experiment.


Assuntos
Líquidos Corporais/química , Ferro/análise , Lítio/análise , Simulação de Ambiente Espacial , Estrôncio/análise , Zinco/análise , Adulto , Voluntários Saudáveis , Humanos , Masculino , Voo Espacial , Espectrofotometria Atômica
5.
Aviakosm Ekolog Med ; 48(6): 10-5, 2014.
Artigo em Russo | MEDLINE | ID: mdl-25928978

RESUMO

The results of studying the system of osteoprotegerin/ receptor activator of nuclear factor kappa-B ligand (OPG/RANKL) in 22 cosmonauts after long-duration (124 to 199 days) ISS missions are presented. Immediately on return to 1 g, changes were observed in OPG and RANKL serum levels and the ability to produce unstimulated and stimulated PGA of peripheral blood mononuclear cells in vitro. Individual variability of these changes was noticed. Our findings suggest that the cytokine OPG/RANKL-system is involved in bone remodeling in members of long-duration space missions.


Assuntos
Leucócitos Mononucleares/metabolismo , Osteoclastos/metabolismo , Osteoprotegerina/sangue , Ligante RANK/sangue , Medicina Aeroespacial , Astronautas , Humanos , Voo Espacial
6.
Aviakosm Ekolog Med ; 47(3): 30-4, 2013.
Artigo em Russo | MEDLINE | ID: mdl-24032162

RESUMO

In an experiment with 7-d dry immersion for testing the mechanic foot and electrical muscle stimulation procedures of compensating the support load deficiency the following biochemical parameters were studied: activated partial thromboplastin time, prothrombin time, prothrombin index, international normalized ratio, thrombin time (TT), fibrinogen, soluble fibrin-monomer complexes, D-dimer (DD), plasminogen (PG); antithrombin III activity (ATIII), protein C (PC) and alpha2-antiplasmin (AP). Control subjects (immersed w/o stimulation) did not exhibit significant shifts in the hemostasis system: however, they decreased ATIII, PC and PG in the post-experimental period. Mechanic foot stimulation did not have a noteworthy effect on the hemostasis system functioning during immersion, whereas electromyostimulation increased procoagulant and fibrinolytic activity in blood plasma.


Assuntos
Hemostasia/fisiologia , Simulação de Ambiente Espacial , Contramedidas de Ausência de Peso , Testes de Coagulação Sanguínea , Estimulação Elétrica , Humanos , Federação Russa , Fatores de Tempo
7.
Aviakosm Ekolog Med ; 47(2): 48-50, 2013.
Artigo em Russo | MEDLINE | ID: mdl-23814899

RESUMO

In the 520-d chamber experiment within the international project Mars-500 blood samples of 6 male test-subjects of 28 to 39 years of age were analyzed for water-soluble antioxidants: total bilirubin and uric acid; in addition, total antioxidant capacity of blood plasma was determined. Maximal values of these parameters were associated with the most stressful periods of the experiment, i.e. adaptation to the life in isolation and confinement, simulation of the egress onto Martian surface, and change of the diet. On attainment of the homeostatic equilibrium the parameters stabilized on levels slightly lower relative to baseline (pre-isolation) values. Therefore, dynamics of the water-soluble antioxidants reflected adequately the homeostatic reactions to and compensation by organism of the effects of the 520-day life in isolation and confinement.


Assuntos
Adaptação Fisiológica , Antioxidantes/metabolismo , Sistemas Ecológicos Fechados , Homeostase/fisiologia , Voo Espacial , Adulto , Bilirrubina/sangue , Alimentos Formulados , Humanos , Masculino , Marte , Solubilidade , Ácido Úrico/sangue , Água/metabolismo
8.
Fiziol Cheloveka ; 39(2): 19-30, 2013.
Artigo em Russo | MEDLINE | ID: mdl-23789382

RESUMO

The paper deals with the results of the effects of 520-day isolation and confinement modeling some elements of a mission to Mars on the immune system. Longitudinal analyses revealed that the mechanisms of adaptive response of the human immune system to the conditions of extremely long isolation led to a change of the parameters, characterizing innate and adaptive immunity. Among them the most important are: changes in the signaling PRRs--TLR, manifested in the reduction of the percentage of circulating monocytes and granulocytes expressed on its own surfaces TLR2, TLR4 and TLR6, decreases early NK cell activation potential, increases in the percentage T- and B-lymphocytes, that expressed early activation marker CD69 after adequate stimulation, and in production of cytokines in response to PHA stimulation. The active mobilization of the mechanisms of adaptive immunity, the implementation of the function of the level of immunity to a qualitatively different level, apparently, should be taken as a sign of adaptive adjustment of an organism in response to the complex influence of unfavorable factors, aimed at the preservation of immune homeostasis.


Assuntos
Imunidade Adaptativa/fisiologia , Medicina Aeroespacial , Imunidade Inata/fisiologia , Voo Espacial , Astronautas , Humanos , Marte , Monócitos/imunologia , Missões Religiosas , Transdução de Sinais/imunologia , Receptor 2 Toll-Like/imunologia , Receptor 4 Toll-Like/imunologia , Receptor 6 Toll-Like/imunologia
9.
Fiziol Cheloveka ; 39(2): 79-84, 2013.
Artigo em Russo | MEDLINE | ID: mdl-23789387

RESUMO

Within the period of 2000 to 2012 the values of 40 diagnostically significant biochemical indices in venous blood were being determined during the pre-flight clinical and physiological examination of 28 Russian cosmonauts aged 35 to 54, members of main and back-up crews of expeditions to the International Space Station. The above examination was conducted 45-30 days prior to the launch. Taking account of the fact that each of the most of the cosmonauts performed several flights over the mentioned period and they were repeatedly included in back-up crews over and over again, each of cosmonauts participated in pre-flight examinations 1 to 5 times. Reference values were calculated for each of the studied indices. It was found that reference interval boundaries for 15 indices were narrower as compared to the generally accepted ranges. The upper boundaries of activity reference ranges of a number of enzymes, as well as of concentration of some metabolites of energy and plasticity metabolism were raised relative to mean population values. Thus, it was found that Russian cosmonauts being a specific professional team featured inherent reference values which differed from mean population values in a number of blood biochemical indices. It is conditioned by peculiarities of selection, physical training and psychic and emotional status of crew members during a pre-flight period.


Assuntos
Astronautas , Análise Química do Sangue/métodos , Padrões de Referência , Voo Espacial , Adaptação Fisiológica , Adulto , Análise Química do Sangue/normas , Hemodinâmica , Humanos , Masculino , Pessoa de Meia-Idade , Federação Russa , Ausência de Peso
10.
Aviakosm Ekolog Med ; 47(5): 48-53, 2013.
Artigo em Russo | MEDLINE | ID: mdl-24490288

RESUMO

In experiment MARS-500 on remote space flight simulation, atomic emission spectral analysis with inductively coupled argon plasma was used to measure serum copper and its ultrafiltration fraction. It was shown that, in contrast to baseline data, the Cu serum level varied within the normal physiological boundaries throughout the entire simulation experiment. These variations were sync in all the serum samples. In several periods in the experiment reductions in serum Cu within the baseline range were equivalent to simultaneous reductions in ceruloplasmin. Amount of the free Cu (ultrafiltration) fraction, i.e. not bound to proteins in blood serum, was constant at all times. Since the simulation experiment is not a perfect analogy of space flight because of nonreproducibility of some factors, ionizing radiation specifically, we should take into consideration shifts in the serum copper balance caused by the action of space radiation on human organism. Radiation-induced imbalance is not only a marker of disturbed oxidase function of blood but also points to a mechanism of potential pathological outcome of toxic excessive copper accumulated in the brain, liver and kidney.


Assuntos
Cobre/sangue , Soro/química , Voo Espacial , Ultrafiltração , Adulto , Seguimentos , Humanos , Masculino , Espectrofotometria Atômica
11.
Aviakosm Ekolog Med ; 46(3): 28-31, 2012.
Artigo em Russo | MEDLINE | ID: mdl-23074947

RESUMO

Total and ionized magnesium in blood serum and in daily urine were determined before (baseline values) and on days 30, 60 and 105 of the experiment with 105-d isolation and confinement (Mars-105)/ Magnesium in hair was investigated before (baseline values) and on day-105 of the experiment. The investigations were performed using atomic emission spectrometry with inductively coupled argon plasma. Changes in magnesium were most significant over the initial 30 days in the experiment. Reduction of serum magnesium was accounted for by the fall in the ionized fraction. In organism magnesium is controlled by the ion-regulatory function of the kidney and varies with individuals. Levels of ionized magnesium in blood serum and excreted with daily urine can serve as indicators of stress resistivity .


Assuntos
Cabelo/química , Rim/fisiologia , Magnésio , Adulto , Astronautas , Humanos , Magnésio/sangue , Magnésio/urina , Masculino , Isolamento Social , Voo Espacial , Simulação de Ambiente Espacial , Espectrofotometria Atômica , Estresse Fisiológico
12.
Fiziol Cheloveka ; 38(5): 120-3, 2012.
Artigo em Russo | MEDLINE | ID: mdl-23101250

RESUMO

In the course of a 3-day "dry" immersion experiment involving participation of five male test volunteers aged 25 to 40, in the blood serum of participants were determined the content of LPO (lipid peroxidation) products, namely diene conjugates, malon dialdehyde, shiffbases, as well as the values of the antioxidant protection system (AOP) indices - the concentration of tocopherol as the main lipid antioxidant and the level of general antioxidant activity. During the immersion action no deviations of indices under study from the background values were revealed, with the exception of a certain increase in tocopherol concentration within two hours after experiment beginning. At the restoring period after two hours upon immersion completion a reliable increase of lipid peroxidation products, particularly diene conjugates in participants' blood serum was made evident. At this, the tocopherol content was significantly below the background values. It is therefore concluded that the test participants' adaptation to the simulated weightlessness conditions shows no pronounced stress component, whereas bringing back to normal vital functions after exposure to immersion occurs with significantly pronounced stress reaction development, as demonstrated by considerable growth of LPO processes against the background of AOP system functional activity reducing.


Assuntos
Adaptação Fisiológica , Antioxidantes/metabolismo , Peroxidação de Lipídeos , Malondialdeído/sangue , Tocoferóis/sangue , Ausência de Peso , Adulto , Humanos , Imersão , Masculino , Fatores de Tempo
13.
Aviakosm Ekolog Med ; 45(4): 28-34, 2011.
Artigo em Russo | MEDLINE | ID: mdl-21970040

RESUMO

Metabolic effects of physical countermeasures against deficient weight-loading were studied in three groups of 21-30 y.o. volunteers for 7-d dry immersion. Blood serum was investigated for 38 biochemical parameters that characterize myocardium, skeletal musculature, hepatobiliary system, kidney, pancreas, GI tract, prostate, and protein-nucleic, carbohydrate, electrolyte and mineral metabolism. Seven-day DI w/o countermeasures (n = 5) increased concentration of conjugated bilirubin, suppressed activities of muscular (creatine phosphokinase MM) and myocardial enzymes (CPK MB, OBDH), and caused an upward trend in cholesterol, its atherogenic LDP fraction and triglycerides. Mechanic sole stimulation (n = 6) intensified, within the physiological norm, erythrocyte hematolysis raising total bilirubin and potassium. Despite the stimulation, activity of muscle and myocardial enzymes made a decrease. Blood creatinine decreased to a less extent than in the immersed group w/o stimulation, however, lipid parameters did not rise. High-frequency stimulation of the lower leg and hip muscles in the course of immersion (n = 5) was noted to heighten the activity of muscle enzymes and potassium level in blood beyond the physiological norm. Change in creatinine did not reach a statistical significance and lipid metabolism parameters were not different from baseline values. Application of these physical methods of counteracting deficiency of weight bearing did not interfere with redistribution of body liquids due to immersion. Values of the parameters under study were mostly within the normal limits throughout the experimental exposure suggesting absence of pathological developments during DI or in consequence of physical stimulation. Therefore, the reactions were obviously of normal adaptive character.


Assuntos
Adaptação Fisiológica , Astronautas , Imersão/efeitos adversos , Voo Espacial , Simulação de Ausência de Peso/efeitos adversos , Adulto , Medicina Aeroespacial , Biomarcadores/sangue , Biomarcadores/metabolismo , Estimulação Elétrica , Meio Ambiente Extraterreno , Humanos , Masculino , Suporte de Carga , Adulto Jovem
14.
Aviakosm Ekolog Med ; 45(3): 24-9, 2011.
Artigo em Russo | MEDLINE | ID: mdl-21916247

RESUMO

Six male volunteers (aged 25 to 40 years) were subjects in all-round psychophysiological, hormonal and immunological studies before, in and after 105-day isolation and confinement. Blood was drawn and the 16-factorial Cattell personality inventory was filled out every 30 days. Concentrations of blood hormones, neurospecific proteins and cytokines point to a close interrelation between antibody titers to myelin-associated glycoprotein and changes in the parameters of metabolism and reproduction-related hormones, as well as cytokines and individual psychophysiology (extra-introversion, dominance, intropunitiveness, social contact selectivity, etc.), and suggest a minimum risk of demyelinizing neuropathy due to exposure to the conditions of isolation and confinement.


Assuntos
Doenças Desmielinizantes/sangue , Doenças Desmielinizantes/imunologia , Glicoproteína Associada a Mielina/biossíntese , Polineuropatias/sangue , Polineuropatias/imunologia , Isolamento Social/psicologia , Simulação de Ambiente Espacial/métodos , Adulto , Anticorpos/sangue , Anticorpos/imunologia , Citocinas/biossíntese , Citocinas/sangue , Doenças Desmielinizantes/diagnóstico , Doenças Desmielinizantes/prevenção & controle , Hormônios/biossíntese , Hormônios/sangue , Humanos , Imunoquímica , Masculino , Glicoproteína Associada a Mielina/sangue , Polineuropatias/diagnóstico , Polineuropatias/prevenção & controle , Análise de Regressão , Fatores de Risco , Comportamento Social , Voo Espacial , Inquéritos e Questionários
15.
Aviakosm Ekolog Med ; 45(3): 17-23, 2011.
Artigo em Russo | MEDLINE | ID: mdl-21916246

RESUMO

The system of congenital immunity was studied in 12 essentially healthy males 18 to 26 years of age subjected to 5-day dry immersion without use of countermeasures. Peripheral blood was analyzed for monocytes, granulocytes and lymphocytes expressing the TLR2+, TLR4+, TLR6+, CD11b+, CD14+, CD16+, CD18+, CD24+, CD36+, CD54+, CD56+ and CD206+ receptors. Expression of early activation marker CD69 on lymphocytes-natural killers was studied in unstimulated and interleukin-2 activated mononuclear cell cultures. The negative shifts in the congenital immunity system in some volunteers at the end of immersion and during recovery can be considered as warnings about depletion of the system reserve and increase of the risk of infectious diseases such as caused by normal microflora which typically does not provoke pathological reactions of the host.


Assuntos
Antígenos CD/biossíntese , Granulócitos/metabolismo , Imunidade Inata , Células Matadoras Naturais/metabolismo , Monócitos/metabolismo , Receptores Toll-Like/biossíntese , Simulação de Ausência de Peso/métodos , Adolescente , Antígenos CD/imunologia , Células Cultivadas , Citometria de Fluxo , Imunofluorescência , Granulócitos/citologia , Granulócitos/imunologia , Humanos , Imersão/efeitos adversos , Interleucina-2/imunologia , Interleucina-2/farmacologia , Células Matadoras Naturais/citologia , Células Matadoras Naturais/imunologia , Ativação Linfocitária/efeitos dos fármacos , Masculino , Monócitos/citologia , Monócitos/imunologia , Infecções Oportunistas/etiologia , Infecções Oportunistas/prevenção & controle , Risco , Receptores Toll-Like/imunologia , Simulação de Ausência de Peso/efeitos adversos , Adulto Jovem
16.
Aviakosm Ekolog Med ; 45(2): 39-44, 2011.
Artigo em Russo | MEDLINE | ID: mdl-21848214

RESUMO

Before, in and after the experiment with 105-day isolation and confinement, 6 male volunteers from 25 to 40 years of age rationed NaCl and performed integral impedancimetric, psychological and hormonal investigations. Every 30 days blood collection for hormonal measurements was combined with filling of Cattell's 16 personal factor questionnaire. Parameters of total body fluid, body mass, basic exchange, specific hydration and basic exchange were determined. The results showed that the experimental conditions did not affect significantly body composition, metabolism or neurohumoral regulation; the metabolic variations were largely associated with motivation for and value orientation in accommodation, to the permissible extent, of the controlled diet and work/rest schedule to personal needs. In addition, it was found that evolution of the psychophysiological status of humans in isolation and confinement is governed primnarily by personality characteristics and, to a less degree, specifics and length of exposure to the artificial environment; thus, in the opinion of the volunteers normoxic, normobaric and slightly hypercapnic (0.15-0.65% CO2) atmosphere was comfortable and harmless to health. Analysis of the whole data array verified the expressed interrelation of neuroendocrine and psychophysiological parameters as well as shifts in body basic exchange and mass, salt intake and hydration rate in the conditions of isolation and confinement.


Assuntos
Adaptação Fisiológica , Adaptação Psicológica , Composição Corporal/fisiologia , Espaços Confinados , Hormônios/sangue , Simulação de Ambiente Espacial , Adulto , Seguimentos , Humanos , Masculino , Astronave , Fatores de Tempo
17.
Aviakosm Ekolog Med ; 45(2): 34-8, 2011.
Artigo em Russo | MEDLINE | ID: mdl-21848213

RESUMO

Comparison of bone mineral density and fatty-acid blood content in 9 human subjects exposed to 370-d bed rest revealed correlation of the loss in femoral neck density with parameters of lipid exchange. On day-46 of BR, the absolute lipids content in erythrocyte membranes and blood serum decreased considerably (1.5-2 times) when compared with baseline data. At the end of the experiment, lipids content in serum, on the contrary, surpassed baseline values 2-3 times: however, it remained lowered in erythrocyte membranes of the control group till day-280 of BR. Arachidonic acid correlated with prostaglandins PGE2 and PGF2alpha involved in regulation of osteoclasts and osteoblasts activities. Correlation of decreases in femoral neck density and unsaturated fatty acids in blood serum and erythrocyte membranes varied with the human subjects.


Assuntos
Repouso em Cama , Densidade Óssea/fisiologia , Hipocinesia/metabolismo , Lipídeos/sangue , Adulto , Seguimentos , Humanos , Masculino , Simulação de Ambiente Espacial , Fatores de Tempo
18.
Fiziol Cheloveka ; 37(3): 92-7, 2011.
Artigo em Russo | MEDLINE | ID: mdl-21780685

RESUMO

In the blood serum of seventeen members of crews which participated in 14 orbital expeditions to the International Space Station with the duration of 125 to 217 days, during the pre-flight period and on the day of landing on the 1st, 7th and 14th days of the rehabilitation period (RP) the content of LPO products was determined, namely diene conjugates (DC), malon dialdehyde (MDA), shiffbases (SB) and the main lipid oxidant - tocopherol (TP). The group of astronauts who made landing in the Space Shuttle spacecraft (8 persons) and the group of astronauts who accomplished space mission in the Soyus TM spacecraft (9 persons) demonstrated a decrease in DC and MDA levels with a rise in TF concentration in the course of the rehabilitation period. Changes in the group of the American spacecraft astronauts were more pronounced. LPO inhibition during the rehabilitation period is recognized [treated] as an adequate reaction to the stress caused by re-adaptation to the ground conditions. Also are discussed probable mechanisms of intergroup differencies in LPO intensity degree: biomembrane phase state changing under the influence of overloads during de-orbiting and stress response intensity during landing in different types of spacecraft.


Assuntos
Adaptação Fisiológica/fisiologia , Antioxidantes/metabolismo , Peroxidação de Lipídeos , Voo Espacial , Estresse Fisiológico/fisiologia , Adulto , Astronautas , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de Tempo
19.
Fiziol Cheloveka ; 37(3): 129-31, 2011.
Artigo em Russo | MEDLINE | ID: mdl-21780689

RESUMO

The present paper deals with studying of hemostasis system indices in the course of the experiment with a 105-day isolation in a hermo chamber. The following values were determined: activated partial thromboplastin time, prothrombin time (PT), prothrombin index (PI), international normalized ratio [relationship] (INR), thrombin time, fibrinogen concentration, soluble fibrin-monomer complexes, D-dimer, plasminogen (PG), activity of antithrombin III, protein C, alpha2-antiplasmin. According to the experiment results, isolation is accompanied by PT prolongation (PI decreasing, INR increasing) which conserves up to the 7th day of the aftereffect period, as well as by PG concentration decreasing. Changes are likely to be connected with peculiarities of reduced motion activity conditions, compensatory physical activity influence, protein and lipid metabolism characteristics changing.


Assuntos
Proteínas Sanguíneas/análise , Sistemas Ecológicos Fechados , Homeostase , Adulto , Testes de Coagulação Sanguínea , Proteínas Sanguíneas/metabolismo , Humanos , Masculino , Fatores de Tempo
20.
Aviakosm Ekolog Med ; 45(1): 40-5, 2011.
Artigo em Russo | MEDLINE | ID: mdl-21675192

RESUMO

Effects of strict 105-d isolation on blood antioxidant status, erythrocyte membrane processes and oxygen-binding properties of hemoglobin were studied in 6 male volunteers (25 to 40 y.o.) in ground-based simulation of a mission to Mars (experiment Mars-105). The parameters were measured using venous blood samples collected during BDC, on days 35, 70 and 105 of the experiment and on days 7 and 14-15 after its completion. Methods of biochemistry (determination of enzyme activity and thin-layer chromatography) and biophysical (laser interference microscopy, Raman spectroscopy) showed changes in relative content of lipid and phospholipid fractions suggesting growth of membrane microviscosity and increase in TBA-AP (active products of lipids peroxidation interacting with thiobarbituric acid). A significant increase in glucose-6-phosphate dehydrogenase and superoxide dismutase activities against reduction of catalase activity points to both reparative processes in erythrocytes and disbalance between the number of evolving active forms of oxygen and antioxidant protection mechanisms in cells. Hemoglobin sensitivity of oxygen and blood level of oxyhemoglobin were found to increase, too. It is presumed that adaptation of organism to stresses experienced during and after the experiment may destroy balance of the antioxidant protection systems which is conducive to oxidation of membrane phospholipids, alteration of their content, increase of membrane microviscosity and eventual failure of the gas-exchange function of erythrocytes.


Assuntos
Antioxidantes/farmacologia , Eritrócitos/metabolismo , Oxigênio/metabolismo , Transporte Respiratório/fisiologia , Simulação de Ambiente Espacial , Adulto , Cromatografia em Camada Fina , Contagem de Eritrócitos , Seguimentos , Humanos , Peroxidação de Lipídeos , Masculino , Valores de Referência , Fatores de Tempo
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