Fig. 5
From: Cobalt nanoparticles induce lung injury, DNA damage and mutations in mice
8-OHdG level (a) and gpt mutant frequency (b) in the genomic DNA of lungs from mice exposed to metal nanoparticles. Mice were instilled intratracheally with 50 μg per mouse of Nano-Co or Nano-TiO2. Control mice were instilled with physiological saline. Lung tissues were collected four months after exposure. Data are mean ± SE of 4 ~ 6 mice. * p < 0.05 vs. Control