Fig. 1.

Primary choroid plexuses (CP) monolayers were treated with vehicle or 10 μM sulforaphane (SF) or allyl-isothiocyanate (AITC) for 24 h. They were then exposed to media without (control) or with 0.25 mM H₂O₂ for 3 h, and the (A) transepithelial electrical resistance (TEER) and (B) transepithelial mannitol permeability were measured. Values are means ± SE; n = 3. ** and ***Significant differences from controls at the P < 0.01 and P < 0.001 levels, respectively, NS, not significant. +++Significant difference from control + H₂O₂ at the P < 0.001 level.