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. 2022 Feb 8;13(2):131. doi: 10.1038/s41419-022-04551-z

Fig. 1. Repeated ionizing radiation induces a risk of radioresistance in NPC cells.

Fig. 1

A (Left) Cell survival curve for treatment with increased doses of ionizing radiation in S26 and S26-R cells, *p < 0.05, **p < 0.01, Student’s t-test. (Right) representative images of colonies formed after treatment with the indicated dose of ionizing radiation in S26 and S26-R cells. B A cell proliferation curve was constructed from the MTS assay results, data are presented as the mean ± S.D. values, **p < 0.01, Student’s t-test. C, D S26 and S26-R cells were treated with or without 4 Gy of radiation for 48 h, then subjected to flow cytometry analysis of apoptosis *p < 0.05, Student’s t-test (C) and western blotting of the apoptotic markers (D); α-tubulin was used as loading control. (NPC, nasopharyngeal carcinoma; MTS, 3-(4,5-dimethylthiazol-2-yl)−5-(3-carboxymethoxyphenyl)−2-(4-sulfophenyl)−2H-tetrazolium.).