Figure 1.

Effects of melatonin on cell viability. (A) Chemical structure of melatonin (from National Center of Biotechnology Information, PubChem CID: 896). (B) Human MSCs were seeded in 96-well plates at a density of 8 × 10³ cells/well and then treated with or without ODM containing indicated concentrations of melatonin for 3 days. Cell viability was determined using the MTT assay. Data are represented as mean ± SEM of three individual experiments (n = 3). Statistical significance was determined using Student's t-test (^*p < 0.05; ^**p < 0.01; compared with untreated control).