Figure 2. Treatment with AT7519 or flavopiridol accelerates resolution of neutrophilic inflammation.

Tg(mpx:EGFP)ⁱ¹¹⁴ zebrafish embryos underwent tailfin transection at 3 dpf and were serially imaged at various time points post-injury. (a) Embryos were micro-injected with DMSO or (b) AT7519 at 4 hpi with representative images (80x magnification) from 4 h [i] and 24 h [ii] shown. (c [i]) Serial neutrophil numbers at each tailfin were quantified with the blue arrow indicating the 4 hpi time of drug administration. ≥40 fish from 4 independent experiments. Data expressed as ±SEM. (c [ii]) In separate experiments, Tg(mpx:EGFP)ⁱ¹¹⁴ zebrafish embryos were also treated with flavopiridol (FVP) at 4 hpi and the neutrophil numbers at the tailfin quantified. ≥31 fish from 3 independent experiments. (d) The total neutrophils in the entire embryo at 24 hpi and DMSO/AT7519/FVP treatment were imaged and quantified. ≥10 fish from 3 independent experiments. (e) Time lapse movies of embryos (3 per group) were analysed and the number of cells which migrate to the wound for 15 hpi and DMSO/AT7519 treatment was counted. *p < 0.05 at 24 hpi, data analysed by two-way ANOVA then post-test Newman-Keuls or unpaired t-test. n/s: not significant.