NaV1.8 protein is down-regulated in the DRG and up-regulated in the nerve after SNE. A: Nav1.8-ir in representative DRG sections after SNE. B: Quantification of fluorescence intensity in DRG neurons. Neurons are classified by cell area. □: contralateral. ▪: ipsilateral. DRG measurements were from 3 contralateral and 6 ipsilateral sections (n = 3. *; p < 0.05, one-way ANOVA, Tukey post-hoc). C: NaV1.8-ir in representative sections of sciatic nerve after SNE. D: Quantification of fluorescence intensity in sciatic nerve. Measurements were made from 8 contralateral and 8 ipsilateral sections. (n = 3, *; p < 0.05, t-test). Scale bar: 100 μm for A and C. Tissue was harvested 2 weeks after SNE. For both DRG and nerve sections, average intensity was measured using ImageJ software. Output intensity values were on a 0–255 scale based on the 255 shades of grey present in the image, with 0 representing black and 255 representing white. The output numerical intensity value was defined as "relative fluorescence."