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Effect of combination of IR and AuNPs on the viability of human cancer cells in vitro. (A) DU145 (prostate) and (B) A549 (lung) cancer cells were treated with 1 mM AuNPs for 24 h prior to exposure to 0–6 Gy of 6 MV X-rays and cell viability (viability %) was measured after 24 h or 48 h post-irradiation using the MTS assay. Results expressed as the mean ± SEM of 3 replicates.
