The mRNA expression levels of IL-1β, IL-6, IL-18, TNFα, and IFNγ in the spinal dorsal horn (A, B) and thalamus (C, D) were evaluated with RT-qPCR using the comparative CT method (2−ΔCT). Basal mRNA expression levels of these cytokines relative to β-actin (ACTB) in the non-diabetic group are shown in A and C. Fold changes of mRNA expression levels in the type 2 diabetic group compared to that in the non-diabetic control group are shown in B and D. Each value is presented as the mean ± SEM (n=6–7). *P < 0.05 vs. non-diabetic.