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Effects of indirubin on Td-EC tube formation in vitro.
Notes: HUVEC (A, B) and Td-EC (C, D) were treated with 5 µM indirubin. DMSO was used as a negative control. The tube-like structures are indicated by black arrows. Magnification 100×. Scale bars =100 µm. Quantification of tube formation number (%) is shown in (E). *P<0.05.
Abbreviations: DMSO, dimethylsulfoxide; HUVEC, human umbilical vein endothelial cells; Td-EC, tumor-derived endothelial cells.
