Fig. 3. The levels of cell apoptosis were decreased with the long-term radon exposure. The BEAS-2B cells from each group were harvested after the indicated times of radon exposure. The levels of cell apoptosis were analyzed.(A) Apoptotic cells were detected with Annexin V/PI staining by flow cytometry analysis; representative apoptotic images of each group of cells with the indicated times of radon exposure are shown. (B) The levels of cell apoptosis in various radon exposure times were calculated. Results are expressed as means ± SD (n = 4). (*p < 0.05 radon exposure groups vs. control group).
