Expression of CXCL8 mRNA in the PBNs of chronic renal failure. M, DL2000; 1 and 2, GAPDHC and CXCL8 of normal control; 3, 4, 5 and 6, GAPDH and CXCL8 of CRF without infection (patient 1 and patient 2); 7, 8, 9 and 10, GAPDH and CXCL8 of CRF with infection (patient 3 and patient 4).