FIGURE 3.

GA‐GNPs demonstrate cytotoxic effect on human glioma U251 cells and lead to sensitization to radiation. (a) U251 cells were treated with different concentrations of GNPs or GA‐GNPs (100, 150, 200 μg/ml) for indicated time points (days 1, 2, and 3). Cell survival was determined by MTT analysis. B. U251 cells were treated with combination of different concentrations of GA‐GNPs (100, 150, and 200 μg/ml) and multiple dose of radiation (0, 2, 4, 6, 8,10, and 12 Gy). After 48 hr, cell viability was determined by MTT analysis