Live/dead and CyQuant viability assays were performed as previously described (12 (link)). For live/dead assays, hBMECs were costained with calcein-AM (live/green, 3 μM; Invitrogen) and propidium iodide (dead/red, 2.5 μM; Calbiochem). calcein-AM-positive versus PI-positive cells were resolved using an Olympus IX51 microscope and overlaid using Adobe Photoshop. hBMECs were incubated with CyQuant-NF (Thermo Fisher), and fluorescence was quantified using a BioTek FLx800 fluorimeter.
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