“These experiments revealed that Cys–X –Cys receptor (CXCR)1, CXCR2 and CXCR3 mRNAs, as well as Cys–X–Cys ligand (CXCL)9 (monokine induced by IFN-γ ) and CXCL10 (IFN-γ inducible protein 10) mRNAs, were significantly upregulated in RA as compared with OA disease.”