Objective To investigate the expression level of chemokine receptor CXCR7 in esophageal cancer and its effect on esophageal cancer cell proliferation. Methods The quantitative real time polymerase chain reaction( q RT-PCR)technique was used to detect the expression level of CXCR7 in esophageal cancer tissues and their adjacent normal tissues. Human wild type and mutant CXCR7 c DNAs were amplified by PCR technique,and then p EGFP-wt CXCR7 and p EGFP-CXCR7ΔC were contructed through double enzyme digestion and...