scholarly journals Skeletal Muscle Atrophy Was Alleviated by Salidroside Through Suppressing Oxidative Stress and Inflammation During Denervation

2019 ◽  
Vol 10 ◽  
Author(s):  
Ziwei Huang ◽  
Qingqing Fang ◽  
Wenjing Ma ◽  
Qiuyu Zhang ◽  
Jiaying Qiu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Skeletal Muscle ◽  
Muscle Atrophy ◽  
Skeletal Muscle Atrophy

scholarly journals Hydrogen sulfide alleviates hyperhomocysteinemia-mediated skeletal muscle atrophy via mitigation of oxidative and endoplasmic reticulum stress injury

2018 ◽  
Vol 315 (5) ◽  
pp. C609-C622 ◽  
Author(s):  
Avisek Majumder ◽  
Mahavir Singh ◽  
Jyotirmaya Behera ◽  
Nicholas T. Theilen ◽  
Akash K. George ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Skeletal Muscle ◽  
Endoplasmic Reticulum ◽  
Hydrogen Sulfide ◽  
Er Stress ◽  
Muscle Atrophy ◽  
C2c12 Cells ◽  
Skeletal Muscle Atrophy ◽  
Stress Injury ◽  
Western Blots

Although hyperhomocysteinemia (HHcy) occurs because of the deficiency in cystathionine-β-synthase (CBS) causing skeletal muscle dysfunction, it is still unclear whether this effect is mediated through oxidative stress, endoplasmic reticulum (ER) stress, or both. Nevertheless, there is no treatment option available to improve HHcy-mediated muscle injury. Hydrogen sulfide (H2S) is an antioxidant compound, and patients with CBS mutation do not produce H2S. In this study, we hypothesized that H2S mitigates HHcy-induced redox imbalance/ER stress during skeletal muscle atrophy via JNK phosphorylation. We used CBS+/−mice to study HHcy-mediated muscle atrophy, and treated them with sodium hydrogen sulfide (NaHS; an H2S donor). Proteins and mRNAs were examined by Western blots and quantitative PCR. Proinflammatory cytokines were also measured. Muscle mass and strength were studied via fatigue susceptibility test. Our data revealed that HHcy was detrimental to skeletal mass, particularly gastrocnemius and quadriceps muscle weight. We noticed that oxidative stress was reversed by NaHS in homocysteine (Hcy)-treated C2C12 cells. Interestingly, ER stress markers (GRP78, ATF6, pIRE1α, and pJNK) were elevated in vivo and in vitro, and NaHS mitigated these effects. Additionally, we observed that JNK phosphorylation was upregulated in C2C12 after Hcy treatment, but NaHS could not reduce this effect. Furthermore, inflammatory cytokines IL-6 and TNF-α were higher in plasma from CBS as compared with wild-type mice. FOXO1-mediated Atrogin-1 and MuRF-1 upregulation were attenuated by NaHS. Functional studies revealed that NaHS administration improved muscle fatigability in CBS+/−mice. In conclusion, our work provides evidence that NaHS is beneficial in mitigating HHcy-mediated skeletal injury incited by oxidative/ER stress responses.

scholarly journals Mitochondrial-targeted antioxidants protect skeletal muscle against immobilization-induced muscle atrophy

2011 ◽  
Vol 111 (5) ◽  
pp. 1459-1466 ◽  
Author(s):  
Kisuk Min ◽  
Ashley J. Smuder ◽  
Oh-sung Kwon ◽  
Andreas N. Kavazis ◽  
Hazel H. Szeto ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Skeletal Muscle ◽  
Muscle Atrophy ◽  
Muscle Fibers ◽  
Skeletal Muscle Atrophy ◽  
Ros Production ◽  
Oxygen Species ◽  
Mitochondrial Ros ◽  
Protease Activation ◽  
Limb Immobilization

Prolonged periods of muscular inactivity (e.g., limb immobilization) result in skeletal muscle atrophy. Although it is established that reactive oxygen species (ROS) play a role in inactivity-induced skeletal muscle atrophy, the cellular pathway(s) responsible for inactivity-induced ROS production remain(s) unclear. To investigate this important issue, we tested the hypothesis that elevated mitochondrial ROS production contributes to immobilization-induced increases in oxidative stress, protease activation, and myofiber atrophy in skeletal muscle. Cause-and-effect was determined by administration of a novel mitochondrial-targeted antioxidant (SS-31) to prevent immobilization-induced mitochondrial ROS production in skeletal muscle fibers. Compared with ambulatory controls, 14 days of muscle immobilization resulted in significant muscle atrophy, along with increased mitochondrial ROS production, muscle oxidative damage, and protease activation. Importantly, treatment with a mitochondrial-targeted antioxidant attenuated the inactivity-induced increase in mitochondrial ROS production and prevented oxidative stress, protease activation, and myofiber atrophy. These results support the hypothesis that redox disturbances contribute to immobilization-induced skeletal muscle atrophy and that mitochondria are an important source of ROS production in muscle fibers during prolonged periods of inactivity.

scholarly journals Denervation does not induce muscle atrophy through oxidative stress

2017 ◽  
Vol 27 (1) ◽  
Author(s):  
Eva Pigna ◽  
Emanuela Greco ◽  
Giulio Morozzi ◽  
Silvia Grottelli ◽  
Alessio Rotini ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Skeletal Muscle ◽  
Stress Response ◽  
Muscle Atrophy ◽  
Oxidative Stress Response ◽  
Skeletal Muscle Atrophy ◽  
Molecular Pathways ◽  
Ubiquitin Proteasome ◽  
Anti Oxidant ◽  
Kinetics Of

Denervation leads to the activation of the catabolic pathways, such as the ubiquitin-proteasome and autophagy, resulting in skeletal muscle atrophy and weakness. Furthermore, denervation induces oxidative stress in skeletal muscle, which is thought to contribute to the induction of skeletal muscle atrophy. Several muscle diseases are characterized by denervation, but the molecular pathways contributing to muscle atrophy have been only partially described. Our study delineates the kinetics of activation of oxidative stress response in skeletal muscle following denervation. Despite the denervation-dependent induction of oxidative stress in skeletal muscle, treatments with anti-oxidant drugs do not prevent the reduction of muscle mass. Our results indicate that, although oxidative stress may contribute to the activation of the response to denervation, it is not responsible by itself of oxidative damage or neurogenic muscle atrophy.

scholarly journals Limited Oxidative Stress Favors Resistance to Skeletal Muscle Atrophy in Hibernating Brown Bears (Ursus Arctos)

Antioxidants ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 334 ◽  
Author(s):  
Chazarin ◽  
Ziemianin ◽  
Evans ◽  
Meugnier ◽  
Loizon ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Skeletal Muscle ◽  
Muscle Atrophy ◽  
Ursus Arctos ◽  
Energy Savings ◽  
Muscle Protein ◽  
Skeletal Muscle Atrophy ◽  
Antioxidant Systems ◽  
Brown Bears ◽  
Chain Complexes

Oxidative stress, which is believed to promote muscle atrophy, has been reported to occur in a few hibernators. However, hibernating bears exhibit efficient energy savings and muscle protein sparing, despite long-term physical inactivity and fasting. We hypothesized that the regulation of the oxidant/antioxidant balance and oxidative stress could favor skeletal muscle maintenance in hibernating brown bears. We showed that increased expressions of cold-inducible proteins CIRBP and RBM3 could favor muscle mass maintenance and alleviate oxidative stress during hibernation. Downregulation of the subunits of the mitochondrial electron transfer chain complexes I, II, and III, and antioxidant enzymes, possibly due to the reduced mitochondrial content, indicated a possible reduction of the production of reactive oxygen species in the hibernating muscle. Concomitantly, the upregulation of cytosolic antioxidant systems, under the control of the transcription factor NRF2, and the maintenance of the GSH/GSSG ratio suggested that bear skeletal muscle is not under a significant oxidative insult during hibernation. Accordingly, lower levels of oxidative damage were recorded in hibernating bear skeletal muscles. These results identify mechanisms by which limited oxidative stress may underlie the resistance to skeletal muscle atrophy in hibernating brown bears. They may constitute therapeutic targets for the treatment of human muscle atrophy.

scholarly journals Camphene Attenuates Skeletal Muscle Atrophy by Regulating Oxidative Stress and Lipid Metabolism in Rats

Nutrients ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3731
Author(s):  
Suji Baek ◽  
Jisu Kim ◽  
Byung Seok Moon ◽  
Sun Mi Park ◽  
Da Eun Jung ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Skeletal Muscle ◽  
Lipid Metabolism ◽  
Muscle Atrophy ◽  
Gas Analysis ◽  
Skeletal Muscle Atrophy ◽  
Ros Scavenging ◽  
In Vivo Models

Sarcopenia- or cachexia-related muscle atrophy is due to imbalanced energy metabolism and oxidative stress-induced muscle dysfunction. Monoterpenes play biological and pharmacological reactive oxygen species (ROS) scavenging roles. Hence, we explored the effects of camphene, a bicyclic monoterpene, on skeletal muscle atrophy in vitro and in vivo. We treated L6 myoblast cells with camphene and then examined the ROS-related oxidative stress using Mito TrackerTM Red FM and anti-8-oxoguanine antibody staining. To investigate lipid metabolism, we performed real-time polymerase chain reactions, holotomographic microscopy, and respiratory gas analysis. Rat muscle atrophy in in vivo models was observed using 18F-fluoro-2-deoxy-D-glucose positron emission tomography/computed tomography and immunocytochemistry. Camphene reversed the aberrant cell size and muscle morphology of L6 myoblasts under starvation and in in vivo models. Camphene also attenuated E3 ubiquitin ligase muscle RING-finger protein-1, mitochondrial fission, and 8-oxoguanine nuclear expression in starved myotubes and hydrogen peroxide (H2O2)-treated cells. Moreover, camphene significantly regulated lipid metabolism in H2O2-treated cells and in vivo models. These findings suggest that camphene may potentially affect skeletal muscle atrophy by regulating oxidative stress and lipid metabolism.

scholarly journals Butyrate ameliorate skeletal muscle atrophy in Diabetic Nephropathy via enhancing gut barrier function and GPR43 mediated PI3K/AKT/mTOR signals

2020 ◽  
Author(s):  
Gang Tang ◽  
Yi Du ◽  
Haochen Guan ◽  
Jieshuang Jia ◽  
Nan Zhu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Skeletal Muscle ◽  
Diabetic Nephropathy ◽  
Muscle Atrophy ◽  
Barrier Function ◽  
Muscle Protein ◽  
C2c12 Cells ◽  
Skeletal Muscle Atrophy ◽  
Intestinal Barrier Function ◽  
Gut Barrier Function

Muscle protein catabolism in patients with diabetic nephropathy (DN) results in striking losses of muscle proteins, which increases morbidity and mortality risks. Emerging evidence shows that short-chain fatty acids (SCFAs) play an important role in the maintenance of health and disease development. Recently, the connection between butyrate (a SCFA) and DN has been revealed, although the relationship between butyrate and muscle atrophy is still not clear. In our study, we found a significant decrease in butyrate in DN using metabolomics analyses. The addition of butyrate remarkably intestinal barrier function. Concurrently, butyrate could alleviate muscle atrophy and promote PI3K/AKT/mTOR signals, and suppress oxidative stress and autophagy in the skeletal muscle of db/db mice as well as high glucose/lipopolysaccharide (HG/LPS)-induced C2C12 cells. To further explore the mechanism, we found that GPR43, the key SCFAs signaling molecule, was significantly decreased in the skeletal muscle of db/db mice and HG/LPS-induced C2C12 cells. Overexpression of GPR43 could activate PI3K/AKT/mTOR signals and inhibit oxidative stress and autophagy in HG/LPS-induced C2C12 cells. Silencing of GPR43 blocked PI3K/AKT/mTOR signals improved by butyrate, as well as suppression of oxidative stress and reduction of autophagy. Ultimately, butyrate alleviated muscle atrophy in DN via GPR43-mediated PI3K/AKT/mTOR pathway

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