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CXCR4 is overexpressed in BM-EPCs. BM-EPCs were transfected with empty vector or adenovirus-CXCR4. (A) The mRNA expression level of CXCR4 was measured by reverse transcription-quantitative PCR assay in BM-EPCs (**P<0.01 vs. vector group). (B) The protein expression level of CXCR4 was examined by western blotting assay in BM-EPCs. BM-EPCs, bone marrow-derived endothelial progenitor cells; CXCR4, chemokine receptor-4.
