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Nevertheless, there is no treatment option available to improve HHcy-mediated muscle injury. Hydrogen sulfide (H<jats:sub>2<\/jats:sub>S) is an antioxidant compound, and patients with CBS mutation do not produce H<jats:sub>2<\/jats:sub>S. In this study, we hypothesized that H<jats:sub>2<\/jats:sub>S mitigates HHcy-induced redox imbalance\/ER stress during skeletal muscle atrophy via JNK phosphorylation. We used CBS<jats:sup>+\/\u2212<\/jats:sup> mice to study HHcy-mediated muscle atrophy, and treated them with sodium hydrogen sulfide (NaHS; an H<jats:sub>2<\/jats:sub>S 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, pIRE1\u03b1, 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-\u03b1 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<jats:sup>+\/\u2212<\/jats:sup> mice. In conclusion, our work provides evidence that NaHS is beneficial in mitigating HHcy-mediated skeletal injury incited by oxidative\/ER stress responses. <\/jats:p>","DOI":"10.1152\/ajpcell.00147.2018","type":"journal-article","created":{"date-parts":[[2018,8,15]],"date-time":"2018-08-15T21:28:54Z","timestamp":1534368534000},"page":"C609-C622","source":"Crossref","is-referenced-by-count":62,"title":["Hydrogen sulfide alleviates hyperhomocysteinemia-mediated skeletal muscle atrophy via mitigation of oxidative and endoplasmic reticulum stress injury"],"prefix":"10.1152","volume":"315","author":[{"given":"Avisek","family":"Majumder","sequence":"first","affiliation":[{"name":"Department of Physiology, University of Louisville School of Medicine, Louisville, Kentucky"},{"name":"Department of Biochemistry and Molecular Genetics, University of Louisville School of Medicine, Louisville, 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