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Male Wistar rats (n\u2009=\u200915) were provided orally with pyridostigmine bromide (PB) 1.3\u00a0mg\/kg\/day, permethrin (PM) 0.13\u00a0mg\/kg\/day (skin), DEET 40\u00a0mg\/kg\/day (skin) and were physically restrained for 5\u00a0min\/day for 3\u00a0weeks. A one-week period ensued to fully develop the GWI-like profile followed by 2\u00a0weeks of either Epi treatment at 1\u00a0mg\/kg\/day by gavage (n\u2009=\u20098) or water (n\u2009=\u20097) for controls. A normal, control group (n\u2009=\u200915) was given vehicle and not restrained. At 6\u00a0weeks, animals were subjected to treadmill and limb strength testing followed by euthanasia. SkM and blood sampling was used for histological, biochemical and plasma pro-inflammatory cytokine and metabolomics assessments. GWI animals developed an intoxication profile characterized SkM atrophy and loss of function accompanied by increases in modulators of muscle atrophy, degradation markers and plasma pro-inflammatory cytokine levels. Treatment of GWI animals with Epi yielded either a significant partial or full normalization of the above stated indicators relative to normal controls. Plasma metabolomics revealed that metabolites linked to inflammation and SkM waste pathways were dysregulated in the GWI group whereas Epi, attenuated such changes. In conclusion, in a rat model of GWI, Epi partially reverses detrimental changes in SkM structure including modulators of atrophy, inflammation and select plasma metabolites yielding improved function.<\/jats:p>","DOI":"10.1038\/s41598-021-01093-w","type":"journal-article","created":{"date-parts":[[2021,11,8]],"date-time":"2021-11-08T11:04:23Z","timestamp":1636369463000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Restorative potential of (\u2212)-epicatechin in a rat model of Gulf War illness muscle atrophy and fatigue"],"prefix":"10.1038","volume":"11","author":[{"given":"Israel","family":"Ramirez-Sanchez","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Viridiana","family":"Navarrete-Ya\u00f1ez","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alejandra","family":"Garate-Carrillo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Modesto","family":"Lara-Hernandez","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Judith","family":"Espinosa-Raya","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aldo","family":"Moreno-Ulloa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Benjamin","family":"Gomez-Diaz","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ana Lilia","family":"Cede\u00f1o-Garcidue\u00f1as","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guillermo","family":"Ceballos","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Francisco","family":"Villarreal","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2021,11,8]]},"reference":[{"key":"1093_CR1","doi-asserted-by":"publisher","first-page":"13","DOI":"10.1136\/jramc-146-01-03","volume":"146","author":"D Upshall","year":"2000","unstructured":"Upshall, D. 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