Changes in oxidative stress severity and antioxidant potential during muscle atrophy and reloading in mice.
Wakana Katsuta, Masahiro Aihara, Noboru Hirose and 2 others
PMID 29410563WHAT IT FOUND
In mice, muscle mass dropped with immobilization and recovered after 14 days of reloading.
Antioxidant capacity fell to a borderline level during immobilization and one day after reloading, while oxidative stress stayed normal. This is an animal model, not human evidence.
Key findings
01Muscle wet weight in the tibialis anterior, gastrocnemius, and soleus fell significantly after cast immobilization and one day of reloading, then recovered to control levels after 14 days of reloading.
02Hydroperoxide levels, the marker of oxidative stress severity, stayed within the normal range throughout the experiment.
03Antioxidant potential dropped to a clinical borderline level two weeks into immobilization and further after one day of reloading, before recovering to the normal range.
STILL TO COME
How it was doneWhat they found
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What it does not show
The study was conducted entirely in mice, so the findings do not directly translate to human patients. The authors applied human normal values and borderline levels to mouse data because no standard reference values exist for mice. The sample size was very small, with only five mice in each group. The authors speculate that these tests could inform physical therapy interventions, but no human clinical trial was performed to test this.
The easy way to misread this
Do not read the drop in antioxidant potential as evidence that prescribing antioxidants will help human patients recover from muscle atrophy. This was a small animal study using human reference ranges for mouse blood, and the authors' suggestions for clinical practice are speculation, not tested interventions.