Lung toxicity of a vapor-grown carbon fiber in comparison with a multi-walled carbon nanotube in F344 rats.

In the VGCF TM -H-treated groups, an increasing trend of total cells in both sexes of 1.6, 3.2, and 6.4 mg/kg groups, significantly higher values or an increasing trend of neutrophils in both sexes of 1.6, 3.2, and 6.4 mg/kg groups, an increasing trend of macrophages in the males of 6.4 mg/kg and in the females of 1.6, 3.2, and 6.4 mg/kg groups, an increasing trend of lymphocytes in the males of 1.6, 3.2, and 6.4 mg/kg groups, significantly higher values or an increasing trend of eosinophils in the males of 3.2 and 6.4 mg/kg and in the females of 1.6, 3.2, and 6.4 mg/kg groups were observed as compared to those of the vehicle-treated group.

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