Among all genes tested, the expression levels of Cxcl1, Mcp1, Il-1b, and Il-6 were significantly upregulated in the DRG after arthritis remission (Figures 8A–D) whereas no significant changes in Tnfα mRNA expression in the DRG were observed (Figure 8E). The gene discussed is CXCL1; the disease is arthritic joint disease.