Fig. 6
a Growth of C6 xenografted tumors in nude mice treated with saline, Au PENPs, Au PENPs-CTX, 131I-Au PENPs, and 131I-Au PENPs-CTX, respectively. The relative tumor volume was normalized according to their initial tumor volume (mean ± SD, n = 5). b Survival rate, c H&E staining and d TUNEL assay of C6 tumor-bearing mice after various treatments (mean ± SD, n = 5). The scale bar shown in both panels represents 200 μm