Mixed
Antioxidant enzymes (SOD, CAT, GPX, HO-1) are essential for skeletal muscle regeneration, as they regulate the viability, proliferation, and differentiation of muscle satellite cells and myoblasts, while also modulating inflammation and angiogenesis.
Muscle regeneration relies on a balance of oxidative stress and antioxidant defense. While antioxidant enzymes (SOD, CAT, GPX) are crucial for protecting and proliferating muscle stem cells, completely eliminating reactive oxygen species (ROS) may hinder the inflammatory signaling needed for proper repair. Natural upregulation of these enzymes through exercise or healthy diet is preferred over high-dose supplementation which might blunt necessary repair signals.
These enzymes not only neutralise excessive ROS, but also affect myogenic regeneration at several reaction stages: enhance viability and proliferation of muscle satellite cells and myoblasts and affect their differentiation. Finally, antioxidant enzymes regulate also processes accompanying muscle regeneration—induce angiogenesis and reduce fibrosis.
Why this rating
Review article citing multiple primary studies and animal models; high mechanistic detail but lacks direct human clinical trial data for specific interventions.
Source
The role of oxidative stress in skeletal muscle injury and regeneration: focus on antioxidant enzymes
Magdalena Kozakowska et al. · Journal of Muscle Research and Cell Motility · 2015
DOI 10.1007/s10974-015-9438-9
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- Heme oxygenase-1 (HO-1) promotes early muscle regeneration by enhancing myoblast proliferation and reducing mortality, but its temporal regulation is critical; sustained HO-1 expression inhibits terminal differentiation by blocking MyoD and myogenin.Good
- Reactive oxygen species (ROS) are not merely damaging byproducts but essential signaling molecules that regulate muscle regeneration, inflammation, and satellite cell activation.Good
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