ABSTRACT
BACKGROUND:Current research on mesenchymal stem cels (MSCs) is mostly focused on its immune regulatory function, while little is reported on the antioxidant capacity of the cels and culture supernatant.OBJECTIVE: To investigate the anti-oxidative capacity of the supernatant harvested from human fetal placenta MSCs (fPMSCs) under a condition of serum free culture. METHODS:fPMSCs were cultured with serum free media, and the supernatants of cels at passages 2-6 were colected at 48 hours after culture. Vitamin C was added into the culture medium, as a positive control, and its concentration was 100 μmol/L. The total antioxidant capacity, scavenging capacity of free radicals and antioxidant enzymatic activities of supernatants were measured. RESULTS AND CONCLUSION: By comparing anti-oxidative activities of vitamin C and na?ve culture medium, supernatants colected from fPMSCs cultures exhibited obvious antioxidant capacities at different extents between passages of cel cultures. The total antioxidant capacity of the culture supernatant was comparable to 40-80 μmol/L vitamin C. In addition, al supernatants derived from cels with different passages displayed capacities to scavenge free radicals, including 2,2-diphenyl-1-picrylhydrazyl radical (DPPH?), hydroxyl radical (?OH), superoxide anion radical (O2-). Even more, activities of antioxidant enzymes, including superoxide dismutase and glutathione peroxidase, were also detected in supernatants colected from different passages of fPMSCs. Under the serum-free condition, the culture supernatants of fPMSCs have antioxidant capacities at certain extent. However, the antioxidant components and underlying mechanisms need to be further studied.