The authors claim that Figs. 5a and b, and 6a and d, reporting data from in vitro invasion assays were published incorrectly. Specifically, two images of invaded cells were by mistake duplicated. The authors performed 2 additional experiments to confirm their data. The results from these experiments are reported in the corrected versions of the figures and legends, as well as the corresponding results section that are shown below. The authors claim that this correction does not influence the conclusion of the study and would like to apologize for this oversight.
CXCR4 is essential for CXCL12-induced invasion
Disruption of CXCR4 and CXCL12 interaction by selective antagonists or anti-CXCR4 antibody blocks cancer metastasis, suggesting an essential role for CXCR4. Therefore, when HCT116 cells were transfected with siRNA specific for CXCR4, it efficiently inhibited CXCL12-mediated invasion to about 31 % compared to the control condition. (Fig. 5a, b). Indeed, the CXCR4-specific siRNA reduced CXCR4 protein expression (Fig. 5c).
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