Indigo naturalis and its component tryptanthrin exert anti-angiogenic effect by arresting cell cycle and inhibiting Akt and FAK signaling in human vascular endothelial cells - Chang, H N; Huang, S T; Yeh, Y C; Wang, H S; Wang, T H; Wu, Y H; Pang, J HS (J Ethnopharmacol, 2015)