Representative ISH staining of IL-6 mRNA signal. Detection of IL-6 mRNA in sections of lumbar ipsilateral DRG (L-DRGi, first column, A, C, F, I, L), lumbar contralateral DRG (L-DRGc, second column, D, G, J, M), and cervical DRG (C-DRGn, third column, B, E, H, K, N). Naïve DRG (first row, A, B), and DRG from CCI- (second and third rows, C–H) and sham-operated (fourth and fifth rows, I–N) rats. Arrows indicate position of SGC. Scale bars = 50 μm.