For each chemokine receptor, with the exception of CCR3, CXCR1, CXCR2, CXCR4, and CXCR5 the corresponding chemokine(s) was expressed by WC007 CRC cells, as determined by RT-PCR and protein expression confirmed by ELISA (Table 4). The gene discussed is CXCR1; the disease is colorectal carcinoma.