Ros-mediated activation of NF-??B and foxo during muscle disuse

  • Dodd S
  • Gagnon B
  • Senf S
 et al. 
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We examined reactive oxygen species as upstream activators of nuclear factor kappaB; (NF-kappaB) and forkhead box O (Foxo) in skeletal muscle during disuse atrophy. Catalase, an enzyme that degrades H2O2, was overexpressed in soleus muscles via plasmid injection prior to 7 days of hindlimb immobilization. The increased catalase activity abolished immobilization-induced transactivation of both NF-kappaB and Foxo and attenuated the loss of muscle mass. Thus, H2O2 may be an important initiator of these signaling pathways that lead to muscle atrophy.

Author-supplied keywords

  • Antioxidant
  • Atrophy
  • Cell signaling
  • Muscle wasting
  • Oxidative stress

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  • Stephen L. Dodd

  • Brittany J. Gagnon

  • Sarah M. Senf

  • Brian A. Hain

  • Andrew R. Judge

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