Aim To study the effect of stromal cell derived factor 1 alpha (SDF-1α) on CXCR4 expression in THP-1 monocyte, and the effect of SDF-1α and CXCR4 antibody on monocyte/endothelium adhesion. Methods CXCR4 InRNA and protein expressions were detected by RT-PCR and Western blotting respectively in moncyte pretreated with 100 μg/L of SDF-1α for 0 and 30 min. ECV-304 endothelial cells pretreated with 0, 50, 100 and 200 μg/L SDF-1α for 30 minutes and sub-incubated with THP-1 cells, with or without CXCR4 antibody (10 mg/L), THP-1/ECV-304 adhes...