Fig. 1.

Photomicrographs of L6 myotubes incubated with hydrogen peroxide—H₂O₂ (a), control—CTR (b), pre-treated with melatonin and then incubated in hydrogen peroxide—MEL + H₂O₂ (c) or pre-treated with LA and then incubated in hydrogen peroxide—LA+ H₂O₂ (d). The myotube viability is expressed as percentage of viable cells (e) and cell size as myotube diameter in micrometer (f). * p < 0.05 vs control cells, #p < 0.05 vs hydrogen peroxide-treated cells and +p < 0.05 vs pre-treated with melatonin and then incubated in hydrogen peroxide