Figure 9  Tube formation by HUVECs after 20 hours of culture on Matrigel with IFN-β. IFN-β (0 ng/mL) served as the positive control (100%). Total tube length and number of branches were quantified by imaging analysis. Data with bars represent mean±SD (n=3). *P<0.05 according to Student t test compared with 0 ng/mL of IFN-β. HUVECs indicates human umbilical vein endothelial cells; IFN, interferon.
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