scholarly journals The Electrical Stimulation of the Bed Nucleus of the Stria Terminalis Causes Oxidative Stress in Skeletal Muscle of Rats

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Mateusz Jakub Karnia ◽  
Dorota Myslinska ◽  
Katarzyna Patrycja Dzik ◽  
Damian Jozef Flis ◽  
Ziemowit Maciej Ciepielewski ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Skeletal Muscle ◽  
Enzyme Activity ◽  
Electrical Stimulation ◽  
Antioxidant Enzyme Activity ◽  
Stria Terminalis ◽  
Free Radical Damage ◽  
Bed Nucleus ◽  
Radical Damage ◽  
Stimulation Of

Recent studies indicate that activation of hypothalamus-pituitary-adrenocortical axis (HPA) plays the crucial role in stress response, while several lines of evidence mark the bed nucleus of the stria terminalis (BST) as a major mediator of the HPA axis responses to stress. The purpose of this study was to investigate the influence of the corticosterone flux induced by the electrical stimulation of BST on markers of free radical damage of lipids and proteins and antioxidant enzyme activity in skeletal muscle of rats. The male Wistar rats were used and assigned to one of three groups: sham-operated (SHM; n=6), two-week (ST2; n=6), and four-week stimulated (ST4; n=5) groups. Blood, soleus, and extensor digitorum longus muscles were collected. The chronic, 4-week electrical stimulation of the BST evokes increased plasma corticosterone concentration, which resulted in oxidative stress in skeletal muscles. We found higher level of lipid peroxidation markers, lower level of protein oxidation marker, and elevated antioxidant enzyme activity in both muscles. Our findings have also potential implication showing that reaction to the long-term “psychological stress” may lead to free radical damage of muscle.

scholarly journals Electrical stimulation of the bed nucleus of the stria terminalis reduces anxiety in a rat model

2017 ◽  
Vol 7 (2) ◽  
pp. e1033-e1033 ◽  
Author(s):  
K Luyck ◽  
T Tambuyzer ◽  
M Deprez ◽  
J Rangarajan ◽  
B Nuttin ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Rat Model ◽  
Stria Terminalis ◽  
Bed Nucleus ◽  
Stimulation Of

The Effect of Progressive Resistance Training on Oxidative Stress and Antioxidant Enzyme Activity in Erythrocytes in Untrained Men

2013 ◽  
Vol 23 (3) ◽  
pp. 230-238 ◽  
Author(s):  
Kamal Azizbeigi ◽  
Mohammad Ali Azarbayjani ◽  
Maghsoud Peeri ◽  
Hamid Agha-alinejad ◽  
Stephen Stannard
Keyword(s):  
Oxidative Stress ◽  
Enzyme Activity ◽  
Resistance Training ◽  
Antioxidant Enzyme ◽  
Antioxidant Enzyme Activity ◽  
Progressive Resistance Training ◽  
Sod Activity ◽  
Free Radical Damage ◽  
Before And After ◽  
Progressive Resistance

This study was undertaken to investigate the effects of progressive resistance-training (PRT) on plasma oxidative stress and antioxidant enzyme activity in erythrocytes. Twenty male volunteers were randomly assigned to 2 groups: PRT and control. Blood samples were collected before and after 8 wk of PRT and analyzed for enzymatic activities of superoxide dismutase (SOD) and glutathione peroxidase (GPx) in erythrocytes, plasma total antioxidant capacity (TAC), and malondialdehyde concentration (MDA, an index of lipid per oxidation in plasma). Resistance training commenced with 8 exercises on nonconsecutive days for 8 wk at 50% of estimated 1-repetition maximum (E1RM) and reached 80% E1RM by Week 8. The results showed that PRT significantly increased erythrocyte SOD activity (1,323 ± 212.52 vs. 1,449.9 ± 173.8 U/g Hb, p = .014). Plasma concentration of MDA also decreased (5.39 ± 1.7 vs. 3.67.4 ± 0.7 nmol/ml, p = .030), although TAC (1.42 ± 0.21 vs. 1.61 ± 0.19 mmol/L, p = .1530) and GPx (39.87 ± 11.5 vs. 48.18 ± 14.48 U/g Hb, p = .883) activity did not undergo any considerable changes. Based on these data, the authors conclude that an 8-wk program of PRT strengthens the defensive system of erythrocytes against free-radical damage and therefore can be applied as a useful approach to alleviate oxidative stress.

Long-term electrical stimulation of bed nucleus of stria terminalis for obsessive-compulsive disorder

2016 ◽  
Vol 22 (6) ◽  
pp. 931-934 ◽  
Author(s):  
S Raymaekers ◽  
K Vansteelandt ◽  
L Luyten ◽  
C Bervoets ◽  
K Demyttenaere ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Obsessive Compulsive Disorder ◽  
Stria Terminalis ◽  
Obsessive Compulsive ◽  
Bed Nucleus ◽  
Compulsive Disorder ◽  
Stimulation Of

ATP concentrations and muscle tension increase linearly with muscle contraction

2003 ◽  
Vol 95 (2) ◽  
pp. 577-583 ◽  
Author(s):  
Jianhua Li ◽  
Nicholas C. King ◽  
Lawrence I. Sinoway
Keyword(s):  
Skeletal Muscle ◽  
Electrical Stimulation ◽  
Muscle Contraction ◽  
Motor Nerve ◽  
Muscle Tension ◽  
Nerve Fibers ◽  
Ventral Root ◽  
Ventral Roots ◽  
Root Stimulation ◽  
Stimulation Of

Previous studies have suggested that activation of ATP-sensitive P2X receptors in skeletal muscle play a role in mediating the exercise pressor reflex (Li J and Sinoway LI. Am J Physiol Heart Circ Physiol 283: H2636–H2643, 2002). To determine the role ATP plays in this reflex, it is necessary to examine whether muscle interstitial ATP (ATPi) concentrations rise with muscle contraction. Accordingly, in this study, muscle contraction was evoked by electrical stimulation of the L7 and S1 ventral roots of the spinal cord in 12 decerebrate cats. Muscle ATPi was collected from microdialysis probes inserted in the muscle. ATP concentrations were determined by the HPLC method. Electrical stimulation of the ventral roots at 3 and 5 Hz increased mean arterial pressure by 13 ± 2 and 16 ± 3 mmHg ( P < 0.05), respectively, and it increased ATP concentration in contracting muscle by 150% ( P < 0.05) and 200% ( P < 0.05), respectively. ATP measured in the opposite control limb did not rise with ventral root stimulation. Section of the L7 and S1 dorsal roots did not affect the ATPi seen with 5-Hz ventral root stimulation. Finally, ventral roots stimulation sufficient to drive motor nerve fibers did not increase ATP in previously paralyzed cats. Thus ATPi is not largely released from sympathetic or motor nerves and does not require an intact afferent reflex pathway. We conclude that ATPi is due to the release of ATP from contracting skeletal muscle cells.

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