Fig. 4. (a) Uptake of the BBB-shuttles THRre_1f and THRre_2f by bEnd.3 cells. (b) Uptake of GFP conjugates by bEnd.3 cells. (c) Permeability in the in vitro BBB cellular model of GFP disulphide bridge conjugates. All values are reported as the mean ± SEM (n = 3–10, ****P < 0.0001, ***P < 0.001, **P < 0.01; t-test).
