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3 protocols using 14c phenytoin

1

Radiolabeled Compound Uptake Assay

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Fetal Bovine Serum (FBS), Penicillin/streptomycin, glutamine, Dextran, Texas Red™ (3000, 10,000, 40,000 and 70,000 MW), B-27™ Supplement (50X), HEPES and Hoechst 33342 were from Invitrogen (Thermo Fisher, Monza, Italy). [14C]sucrose, [14C]mannitol, [3H]methyl-glucose, [3H]citalopram, [14C]leucine, [14C]phenytoin, [14C]phenylalanine, [14C]caffeine, [3H]daunomycin, [3H]testosterone, [3H] [D-Ala2]-Deltorphin II, [3H]propranolol, [3H]verapamil, [3H]prazosin and Microscint 20 Scintillation liquid were purchased from Perkin Elmer, Milan, Italy. [3H]vinblastine, [3H]L-DOPA, [3H]bupropion, [14C]taxol, [3H]gabapentin, [3H]indomethacin, [3H]raclopride, and [3H]flumazenil are from BIOTREND Chemikalien GmbH (Köln, Germany). Dimethyl sulfoxide (DMSO), lucifer yellow (LY), kynurenic acid, (GF120918), KO143, JPH203, phloretin, and triton X100 were purchased from Sigma-Aldrich, Milan, Italy. Aqueous solutions of 8% paraformaldehyde were obtained from Electron Microscopy Sciences (Hatfield, PA, USA).
Tissue-culture-treated multi-well plates and transwell filter inserts (1.12 cm2 growth area, 0.4 µm pore size; transparent polyester) and Corning 96-well plates polystyrene were obtained from Corning (Sigma-Aldrich, Milan, Italy). Optiplate-96 and white Opaque 96-well microplate were from Perkin Elmer, Milan, Italy.
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2

Measuring Cerebrovascular Permeability

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Boluses (1.0 mL each) of the radioactive tracers [14C]phenytoin (PerkinElmer, Boston, Massachusetts; catalog NEC‐246) and [3H]sucrose (Amersham Biosciences, Piscataway, New Jersey; catalog TRA‐322) were injected upstream into the lumen as described previously (Appendix S1).15, 23 The permeability across the cerebrovascular bed was calculated by graphical integration of drug concentration in the corresponding lumen and ECSs over 10 minutes (n = 4 donors in triplicate per condition).20, 22 Permeability values were obtained by integrating the area under the ECSs and the lumen according to an equation described previously.23
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3

Detailed Research Reagent Procurement

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Fetal bovine serum, penicillin/streptomycin, glutamine, HEPES, fungizone, deoxyribonuclease I, and Hoechst 33342 were from Invitrogen (Thermo Fisher, Monza Italy). [14C]sucrose, [14C]mannitol, [3H]methyl-glucose, [14C]leucine, [14C]phenytoin, [14C]caffeine, [3H]digoxin, [3H]daunomycin, [3H]testosterone, [3H] [D-Ala2]-deltorphin II, [3H]propranolol, [3H]prazosin and Microscint 20 scintillation liquid were purchased from Perkin Elmer, Milan Italy and [3H]vinblastine, [14C]Taxol, [3H]methotrexate, [3H]gabapentin and [3H]flumazenil were from BIOTREND Chemikalien GmbH (Köln, Germany).
Fluorescein isothiocyanate-labelled FITC-dextran 40, dimethyl sulfoxide (DMSO), lucifer yellow, rhodamine-123, kynurenic acid, elacridar (GF120918), Y-27632 (ROCK inhibitor), and triton X100 were purchased from Sigma–Aldrich, Milan, Italy, and 8% paraformaldehyde aqueous solution was from Electron Microscopy Sciences (Hatfield, PA, USA).
CHDI compounds, denoted cp (A to J) and histone deacetylase (HDAC) inhibitor (cp K) were synthesized as previously described [10 (link),11 (link)].
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