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Objective To explore the effects of percutaneous impulsive current stimulation in hepatic region on the activity of hepatic mitochondrial Na+-K+-ATPase and Ca2+-Mg2+-ATPase in exercise-induced fatigued rats, in order to investigate the effect of exercise-induced fatigue. Methods Seventy-two 8-week old male Wistar rats were randomly divided into 4 groups (18 each): control group (group A), fatigue group (group B), stimulation before fatigue group (group C) and stimulation after fatigue group (group D). Exhaustion of animals in B, C and D groups were reproduced by prolonged swimming. Current stimulation (1024Hz, 10mA, current cycle 1sec) for 20 minutes was given to the rats of group C before swimming, and to those in group D after exhaustion. At the weekend of 1st, 3rd and 5th week after modeling, the rats were sacrificed in batches from each group (6 each). The activities of hepatic mitochondrial Na+-K+-ATPase and Ca2+-Mg2+-ATPase were determined by spectrophotometry, and Bradfood protein quantification was employed to quantitate the protein in rats' hepatic mitochondria. Results No significant difference was found in swimming-exhaustion time among 3 groups at the first weekend (P>0.05), while the swimming-exhaustion time was significantly prolonged at the 3rd and 5th weekends in group D than in group B and C (P+-K+-ATPase and Ca2+-Mg2+-ATPase among the 4 groups (including group A) at the weekend of the 1st week (P>0.05), while the enzyme activities were obviously lower at the 3rd and 5th weekend in group B than that in groups A, C and D (P+-K+-ATPase and Ca2+-Mg2+-ATPase. Percutaneous pulsive current stimulating hepatic region of exercise-induced fatigued rats may improve the enzyme activity, reduce the concentration of free calcium and calcium overload in mitochondria, stimulate the oxidative phosphorylation, accelerate the rate of respiratory chain, promote exercise endurance and score, and relieve exercise-induced fatigue rapidly.
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Objective: To screen the active parts with enriching the blood effects of different solvent extraction parts from Jiaoai Decoction (JAD) by comparing the peripheral blood, immune organ index, interleukin 2 (IL-2), and erythropoietin (EPO) and the effect of content of erythrocyte membrane and energy metabolism enzyme activity of blood deficiency model rats. Methods: Taking the fundus venous plexus blood 5 mL/kg every day, continuous bleeding for 12 d, to establish the rat model of blood deficiency; The model animals in each group were ig given JAD and n-butanol, petroleum ether, ethyl acetate, parts of water extract (12 g/kg crude drug) with compound E-Jiao slurry as a positive control. On day 12 of modeling, the erythrocyte count (RBC), hemoglobin (HGB), red blood cell hematocrit (HCT), platelet count (PLT) were detected in rats and immune organ indexes of spleen and thymus were calculated, the levels of IL-2 and EPO content were detected, energy metabolism enzymes (Na+, K+-ATPase and Ca2+, Mg2+-ATPase) activity were investigated; The difference of the chemical constituents in the different solvent extraction of JAD was analyzed by UPLC. Results: Compared with the control group, the RBC, HGB, HCT, PLT, thymus index, and IL-2 levels of rats in the model group decreased significantly, Na+, K+-ATPase and Ca2+, Mg2+-ATPase activity weakened significantly, the spleen index and EPO levels were significantly increased, indicating that blood deficiency model was successfully established. Compared with the model group, HCT, RBC, HGB, and PLT (P<0.05, 0.01) of rats in n-butyl alcohol group could be significantly increased; The spleen index and the content of EPO (P<0.05, 0.01) were reduced; The thymus index and the content of IL-2 (P<0.01) were increased, the erythrocyte Ca2+, Mg2+-ATPase and Na+, K+-ATPase activity (P<0.05, 0.01) was elevated. The contents of PLT and IL-2 (P<0.01) in petroleum ether group could be obviously increased; The content of EPO and the spleen index (P<0.05, 0.01) were decreased. The ethyl acetate fractions could obviously reduce the spleen index and the content of EPO (P<0.01), increase Ca2+, Mg2+-ATPase activity in erythrocytes (P<0.05). In water group PLT (P<0.05) could be significantly increased and the content of EPO (P<0.01) be decreased. There were no coffee acid, benzoyl paeoniflorin, and ammonium glycyrrhizinate in other solvent extracts of JAD, while the content of gallic acid, protocatechuic acid, ligustrazine phosphate, and chlorogenic acid in n-butanol extract were higher than those in ethyl acetate and water extract parts of JAD. Conclusion: The n-butanol extract is the most active part of JAD for enriching the blood.
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To explore the mechanism of platelet activateation in vascular dementia(VD), the activity of myosin light chain phosphorylation and Ca 2+ Mg 2+ ATPase,the concentration of [Ca 2+ ]i were measured in 28 healthy controls, 38 patients with acute cerebral infarction (ACI), and 32 patients with VD. The activity of MLCK in VD and ACI groups was significantly higher than that in the controls( P
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Objective To study the effects of Qinglongyi polysaccharide on sialic acid (SA) content, Na+, K+-ATP and Ca2+, Mg2+-ATPase activity, and membrane potential in erythrocytes of S180 mice. Methods Using Kit to determine the SA content and Na+, K+-ATPase, Ca2+, Mg2+-ATPase activity, using flow cytometry to determine the membrane potential of erythrocytes of S180 mice. Results In the treated groups with three doses, it showed Qinglongyi polysaccharide could make the SA content increased (P
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Objective To explore the dynamic alteration of intracellular free calcium concentration([Ca 2+ ]i),ATP level and membrane Ca 2+ Mg 2+ ATPase activity of erythrocyte in the patients with acute cerebral infarction(CI).Methods we examined [Ca 2+ ]i,ATP level and membrane Ca 2+ Mg 2+ ATPase activity of erythrocyte in 30 patients with acute CI and 28 health controls by Fluorescence Activated Cell Sorter.Results [Ca 2+ ]i in erythrocyte increased significantly in CI group( P
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Objective To study the mechanism of the rat’s myocardium induced by macleaya cordata. Methods36 SD rats were randomly assigned to 2 experimental groups treated by macleaya cordata decoction with a dose of 1/6 LD50, 1/3 LD50 respectively and a control group treated with distilled water by oral administration. The rats were killed 6 hours after the administration for taking the cardiac muscle to examine the Ca2+.Mg2+-ATPase, SDH while observing the structures. ResoultsIn the group treated by macleaya cordata with dose of 1/6 LD50, the activity of Ca2+.Mg2+-ATPase and SDH were increased significantly.However, the groups treated by macleaya cordata with dose of 1/3 LD50 and distilled water, the activity of Ca2+.Mg2+-ATPase,SDH showed no significant change. The apoptosise in myocardium cells of rat’s can be observed in the experimental groups,while the changes were not seen in control group. ConclusionThe results indicate that the macleaye cordata can induce and improve the apoptosis of myocardium cells in low dose, and these effects may be induced by stimulating the activity of Ca2+.Mg2+-ATPase,SDH in myocardium cells.
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Objective To study the changes of Na+K+-ATPase,Ca2+Mg2+-ATPase activities in erythrocyte membrane and blood viscosity in children with essential hypertension.Methods The activities of Na+K+-ATPase,Ca2+Mg2+-ATPase in erythrocyte membrane were determined by a colorimetric method.Blood viscosity was measured and analyzed with the statistic analysis SPSS 12.0 software in 50 children from Nov.2004 to Dec.2004 in the people's hospital of guizhou province and adolescents with essential hypertension.Thirty healthy children were collected as control group.Results The activities of Na+ K+-ATPase[(6.12?1.30)?molpi/(gHb?h)and(4.59?1.40)?molpi/(gHb?h)],Ca2+Mg2+-ATPase[(7.46?1.30)?molpi/(gHb?h)and(5.81?1.20)?molpi/(gHb?h)] were lower significantly in hypertension group than those in control group(Pa
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AIM: Studying the mechanism of protective role of metallothionein (MT) in hypoxic preconditioning(HPC) of cultivated rat cardiomyocytes. METHODS: Using the model of hypoxia/reoxygenation of cultivated rat cardiomyocytes. Determing the contents of MT, malonyldialdehyde (MDA) - metabolism product of lipid peroxidation and the activities of Na+ - K+ ATPase, Ca2+ - Mg2+ ATPase of cardiomyocytes 24 h after HPC, the determining the relevant changes after using MT antibody. RESULTS: After 24 h in HPC, the contents of MT and activities of Na+ - K+ ATPase, Ca2+ - Mg2+ ATPase were obviously higher than those in the control and hypoxia/reoxygenation(P＜ 0. 05 ), and the contents of MDA were decreased remarkedly (P ＜ 0.01 ). Then after using MT antibody, the activities of two enzyme were progressively decreased and the contents of MDA were significanily higher than those in the control and MT antibody - free groups(P ＜ 0.01 ). CONCLUSION: HPC may induce excessive synthesis of MT, and MT can protect myocardial reoxygenation injury by eliminating lipid peroxidation and rising the activities of Na+ - K+ ATPase and Ca2+ - Mg2+ ATPase.
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The basal and calmodulin stimulated Ca2+-Mg2+-ATPase activities in erythrocyte membranes were measured in 40 diabetic patients and 36 normal subjects as control. The results showed that the enzyme activity is significantly decreased in diabetics. The reduction of enzyme activity is inversely related to serum glucose as well as glycosylated hemoglobin. It is suggested that the function of Ca2+-Mg2+-ATPase in red cell membrane of diabetics is decreased. This may be one of the factors causing diabetic microangiopathy. Furthermore, the reduction of enzyme activity might casually be related with hyperglycemia.
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The carbohydrate and lipid contents and Ca2+-Mg2+ ATPase activity of erythrocyte membrane were studied in 10 patients with DMD. The results demonstrated that the sialic acid content was markedly decreased, and the neutral sugar content normal. The cholesterol was significantly increased, but the phospholipids unchanged, resulting in a significantly reduced P/C ratio. The activity of Ca2+-Mg2+ ATPase elevated markedly. The study suggests that the erythrocyte membranes with DMD are altered both in composition and function.
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The activity of alkaline phosphate and Ca2+–Mg2+ adenosine triphosphatase, two of the enzymes involved in limpid and calcium uptake across the intestinal membrane, were increased in experimental atherosclerosis. Administration of Annapavala sindhooram, an antiatherosclerotic drug, lowers these enzyme levels to near normal values. Prostaglandin E2 stimulated the enzyme activities in vitro, while prostaglandin endoperoxide inhibited the activity. Thromboxane and other prostaglandins had no effect on the enzyme activities. Addition of the antiatherosclerotic drug to the in vitro assay system reversed the effect of both prostaglandin E2 and prostaglandin endoperoxide.