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. 2018 Jan 1;2(1):1–11. doi: 10.7150/ntno.22335

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The effect of RT on viability (A) of A431 (blue bars) and FaDu cells (red bars) and genomic DNA damage (B) pre- (solid bars) and post- (hatched bars) radiation treatment. Both viability and the damage to DNA were determined by using flow cytometry. Control cells (no pre-incubation), or experimental cells incubated with 1) Cetuximab (control as a standard immunotherapy for head and neck cancer), 2) STAT3d or 3) AuNP-NUAP-STAT3d for 20h and then either mock-irradiated or irradiated with a single dose of 4Gy. Staining performed with FITC- labeled rabbit polyclonal anti- γ-H2AX antibodies and analyzed by FACS. * - Indicates statistical significance, p<0.005.