The long wave ultraviolet (UVA)was used to radiate mouse fibroblast cell line (NIH 3T3) and establish a model of cell injury in order to probe the protective function and mechanism of Aloe vera gel in cell oxidative damage. After UVA radiated NIH 3T3 cells

the effects of different concentrations of Aloe vera gel on the proliferation and antioxidant enzyme activities of NIH 3T3 cells were detected by CCK-8 and biochemical colorimetric assay respectively. The results show that UVA radiation caused a significant damage to the NIH 3T3 cell

but 100

200

400 μg·mL

-1

. Aloe vera gel can improve the proliferation activity of damaged cells

increase the content of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) in cells. It can simultaneously decrease the activity of lipid peroxidase. In conclusion

that UVA could damage NIH 3T3 cells

while 100~400μg·mL

-1

. Aloe vera gel can antagonize the damage of NIH 3T3 cells induced by UVA and have the effect of light protection.