Fig. 2From: Multi-walled carbon nanotube oxidation dependent keratinocyte cytotoxicity and skin inflammationEffects of MWCNT on the DNFB induced CHS ear swelling responses after 24 h. Mice were sensitized with 30 μl of 0.05% DNFB in a 4:1 acetone/olive oil vehicle on the lower dorsum on day 0. On day 5, the mice were challenged with either vehicle or 0.2% DNFB. The right ears (black bars) are controls that were not treated with MWCNT. The left ears (gray bars) were treated with either pristine MWCNT, MWCNT Low-COOH, MWCNT High-COOH, or MWCNT High-COOH 0.45 μm filtrate. The DNFB increased ear swelling significantly, compared to all vehicle treated mice. Only ears treated with DNFB and MWCNT High-COOH displayed significantly increased swelling responses, compared to DNFB only. Graphs represent changes in mean ear swelling after 24 h (+/− SEM), N = 5. A Student’s T-test was used to analyze all data presented here, since comparisons were between corresponding right and left ears. Significance is defined at a p-value < 0.05, and # indicates significance between groupsBack to article page