Mixed
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.
HO-1 is a key enzyme that helps muscle stem cells multiply after injury, but it must be turned off later to allow muscles to fully mature. Artificially maintaining high HO-1 levels might stop muscles from finishing their repair process. Focus on natural recovery processes rather than trying to sustain high levels of specific enzymes indefinitely.
When expression of HO-1 was temporally regulated, to be induced only during first days after ischemic muscle injury, it decreased mortality in muscle tissue, enhanced myoblast proliferation and inhibited drivers of differentiation... Switching off HO-1 at later time points improved myogenic differentiation by upregulating miR-206 and myogenin.
Why this rating
Based on animal models (mice) and in vitro studies cited in the review.
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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