FIGURE 2.
Micronucleus induction in non-irradiated bystander cells of HepG2 and T98G under hypoxic and normoxic conditions. The bystander cells were either co-cultured with irradiated conspecific cells (CC-O2 and CC-N2) or treated with the conditioned medium (CM-O2 and CM-N2) harvested from irradiated conspecific cells under the same oxygen conditions. The ratio of bystander micronucleus (A,B) to radiation-induced micronucleus of HepG2 cells (C) and T98G cells (D) under hypoxic and normoxic conditions was plotted. a, p < 0.05 compared with the 0-Gy group; b, p < 0.05 compared with the 2-Gy group; c, p < 0.05 compared with the normoxic group.