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Published on: November 8, 2016
Anti-TNF therapy using etanercept suppresses degenerative and inflammatory changes in skeletal muscle of older SJL/J
Hiroshi Nemoto1, Shingo Konno, Hideki Sugimoto
1Division of Neurology, Department of Internal Medicine, Toho University Ohashi Medical Center, 2-17-6 Ohashi, Meguro, Tokyo, Japan.
Abstract:
Limb-girdle muscular dystrophy 2B and Miyoshi myopathy are characterized by muscle fiber necrosis caused by a defect in dysferlin and inflammatory changes. SJL/J mice are deficient in dysferlin and display severe inflammatory changes, most notably the presence of cytokines, which may be related to destruction of the sarcolemma. We tested the hypothesis that tumor necrosis factor (TNF) contributes to myofibril necrosis. Administration of etanercept, an agent that blocks TNF, resulted in dose-dependent reductions in inflammatory change, necrosis, and fatty/fibrous change. These findings indicate that TNF does indeed play a role in the damage to muscle in SJL/J mice and that etanercept has the potential to reduce such damage.
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