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Fig. 1 | Particle and Fibre Toxicology

Fig. 1

From: Nickel oxide nanoparticles can recruit eosinophils in the lungs of rats by the direct release of intracellular eotaxin

Fig. 1

Cytological analysis of BALF after intratracheal instillation of NiO NPs, NiCl2, and OVA. NiO NPs were instilled at 200 cm2/rat and cytological evaluation was performed at 1, 2, 3, and 4 days after instillation. NiCl2 was instilled at 378.0 μg/rat, which is equivalent to the nickel dose (171.1 μg Ni/rat) of NiO NPs at 200 cm2/rat, and cytological evaluation was performed at 1 day after instillation. a, Number of total cells. b Number of macrophages. c Number of neutrophils. d Number of eosinophils. Abbreviations: VEH, vehicle control for NiO NPs and NiCl2; OVA, ovalbumin-induced allergic airway inflammation; VEHOVA, vehicle control for OVA group. Mean ± SEM (n = 10 for NiO NPs and n = 4 for NiCl2 and OVA group). One-way ANOVA test was applied for comparison between NiO NPs and VEH with statistical significance indicated by * p < 0.05, ** p < 0.01, and *** p < 0.001. Student’s t-test was applied for comparison of NiCl2 against VEH and OVA group against VEHOVA with statistical significance indicated by ## p < 0.01 and ### p < 0.001

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