FIGURE 3.

Effect of ATP-depletion and influx or efflux transporter inhibitors on Rb₁ uptake into rBMEC. Rb₁ uptake (60 μg/mL) was measured in the absence (control) or presence of sodium azide (NaN₃, 500 μM), probenecid (100 μM), cytochalasin A (CsA, 25, 50, and 100 μM), and phloretin (5 μM) at 37°C for 120 min. Each column represents the mean ± SE (n = 3) with significant differences from control shown as ^∗∗P < 0.01.