Fig. 3. FITC-labeled annexin-V flow cytometry detection of apoptosis in HUVECs; (A) untreated cells as the control (B, C, and D) and cells treated with TBHQ (60 μM), TQ (10 μM) and a combination of TQ and TBHQ, respectively. As is clear, treatment with TQ significantly prevented TBHQ-induced apoptosis after 24 h.