Ed as described above and washed in PBS (140 mM NaCl, three mM KCl, 20 mM Na2HPO4, 1.five mM KH2PO4, pH 7.four) just before centrifugation at 14,000 g for ten min at 4 . The pellets have been resuspended inside the immunoprecipitation buffer (IPB; containing 20 mM Tris, pH 7.0, one hundred mM NaCl, 2 mM EDTA, 2 mM EGTA, 50 mM NaF, 1 mM sodium orthovanadate, 1 M okadaic acid, 0.1 mM PMSF, and 1:1000 protease inhibitor mixture) with 1 Triton X-100, sonicated for 30 s on ice and additional spun down for ten min to eliminate insoluble supplies. A sample was collected for determining protein concentration employing the BCA assay, a different was stored at 20 as input (positive manage), as well as the rest was processed for immunoprecipitation at a dilution of 0.five mg/ml. Protein A Sepharose beads have been incubated with all the sample for 1 h at 4 below rotation to preabsorb any protein that nonspecifically bound for the protein A Sepharose beads. The supernatant was recovered by centrifugation and 3 g of anti-A2AR antibody (Millipore) or irrelevant IgG (for damaging manage) had been added and incubated for three h at 4 under rotation. To pool-down the immune complexes, the samples were incubated with protein A Sepharose beads for 2 h at four and centrifuged. The pellets have been washed twice in IPB with 1 Triton X-100, 3 occasions in IPB with 1 Triton X-100 and 500 mM NaCl, and twice in IPB. The immunoprecipitates have been resolved by SDS-PAGE buffer, and Western blots have been performed with anti-NKA- 2 isoform or anti-GLTI/EAAT2 antibodies (see Western blot).18494 J. Neurosci., November 20, 2013 33(47):18492Matos et al. A2A Receptor Controls Na /K -ATPaseWestern blot. Western blotting of gliosomal or synaptosomal extracts was performed as previously described (Canas et al., 2009; Matos et al., 2012a). Incubation with the main antibodies, namely anti-A2AR (1: 200; Millipore), anti-GLT-I/EAAT2 (1:1000; Millipore), anti-NKA- 2 isoform (1:200; Millipore), and anti- -actin (1:5000; Sigma-Aldrich), all diluted in Tris-buffered SIRT1 Modulator list saline (TBS; 137 mM NaCl, 20 mM Tris-HCl, pH 7.six) with 0.1 Tween and three BSA (fatty acid absolutely free), was performed overnight at 4 . After washing, the membranes were revealed making use of an enhanced chemifluorescence kit (GE Healthcare) and visualized under a fluorescence LAS-4000 digital imaging system (Fujifilm). The densiometric analysis of protein bands was performed employing Quantity One particular software version four.four.1 (Bio-Rad). Immunohistochemistry. Immunohistochemistry in brain slices was performed as described previously (Canas et al., 2009). Following a transcardiac perfusion, the brains have been postfixed overnight in PBS with four paraformaldehyde and cryopreserved in PBS containing 25 sucrose. The frozen brains were sectioned (30 m coronal slices) using a Leica CM3050S cryostat (Leica Microsystems). The sections corresponding to cortex and striatum were permeabilized, blocked, and incubated overnight at area TIP60 Activator web temperature inside the presence of goat polyclonal antiNKA- 2 isoform antibody (1:500) and mouse monoclonal anti-GLT-I/ EAAT2 (1:1000) antibody. The sections have been subsequently incubated with donkey anti-mouse and anti-goat secondary antibody conjugated with a fluorophore (Alexa Fluor 488 or Alexa Fluor 555, 1:200; Invitrogen) for 2 h at space temperature. Right after rinsing, the sections have been mounted on slides and allowed to dry. Vectashield mounting medium with DAPI (Vector Laboratories) was applied too because the cover glass. All sections had been examined beneath a fluorescence Nikon eclipse E600 microscope, with SPOT softw.
