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5 protocols using anti homer

1

Synaptic Protein Localization Assay

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Amino-5-phosphonopentanoic acid (D-APV), 6-cyano-7-nitroquinoxaline-2,3-dione (CNQX), tetrodotoxin (TTX), BafilomycinA1, and SecinH3 were from Tocris Bioscience (Cookson, USA). Restriction enzymes were from New England Biolabs (Ipswich, USA). Cell culture media were from Invitrogen (Carlsbad, CA, USA). Soluble horseradish peroxidase (HRP) type VI, 3,3′-Diaminobenzidine (DAB) ( #P6782 and #D8001) and all other chemicals were from Sigma-Aldrich, St. Louis, MO. The following primary antibodies have been used: anti-GFP (#MAB3580; Millipore, Darmstadt, Germany); anti-synaptobrevin-2 (Syb2; #104 202; Synaptic Systems, Goettingen, Germany); anti-actin (#A4700) and anti-Arf6 (#A5230, Sigma); anti-Arf6 (#ARP54598_P050; Aviva, San Diego, CA); anti-Rab5(#108 011 Synaptic Systems); anti-Arf1 (#05–1427; EMD Millipore); anti-V5 (#60708; Invitrogen); anti-β-tubulin (#T8328; Sigma) anti-p38 (Mab5258, EMD Millipore); anti-Homer (#106 011; Synaptic Systems); anti-Vglut1 (#135 304; Synaptic Systems).
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2

Immunostaining of Synaptic Proteins

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Cell culture media was from Invitrogen. Poly-L-lysine was from Sigma. The following primary antibodies were used: mouse monoclonal anti-Bassoon clone SAP7F407 (Abcam, UK), mouse monoclonal anti-Synapsin IIa (BD Biosciences, UK), rabbit polyclonal anti-Homer, rabbit polyclonal anti-Shank3, rabbit polyclonal anti-vGlut1 (Synaptic Systems, Germany). Secondary antibodies were from Jackson Immunoresearch (USA). APV, NBQX, TTX were from Tocris (UK).
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3

Comprehensive Neuronal Protein Analysis

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All chemicals, unless otherwise stated were purchased from Sigma-Aldrich (St. Louis, MO). The following primary antibodies were used: anti-PSD95 (Santa Cruz Biotechnology, Dallas, TX, catalog #SC-32290), anti-GAPDH (Santa Cruz Biotechnology, Dallas, TX, catalog #SC-25778) anti-flotillin1 (BD Biosciences, San Jose, CA, catalog #610821), anti-caveolin1 (BD Biosciences, San Jose, CA, catalog #610059), anti-α-synuclein (BD Biosciences, San Jose, CA, catalog #610787), anti-synaptophysin (Synaptic Systems, Goettingen, Germany, catalog #101011), anti-Homer (Synaptic Systems, Goettingen, Germany, catalog #160003), anti-synaptotagmin-1 (Synaptic Systems, Goettingen, Germany, catalog #105011) anti-NMDAR2a (Abcam plc, Cambridge, UK, catalog #ab133265), anti-NMDAR2b (Abcam plc, Cambridge, UK, catalog #ab28373), anti-NMDAR2b phospho S1480 (Abcam plc, Cambridge, UK, catalog #ab73014), anti-PKA (Santa Cruz Biotechnology, #sc-390548), and anti-GluA1 (Abcam plc, Cambridge, UK, catalog #ab32436). Syn peptides (amino acids 12–23 and 34–45) were obtained from Primmbiotech.
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4

Characterizing Neuronal Protein Expression

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Standard immunocytochemistry and Western blot techniques were used to characterize cell type–specific markers and phenotypically relevant protein levels. The following antibodies were used for immunostaining according to the manufacturers’ instructions: anti-GFP (#1010; Aves Labs Inc), anti-PAX6 (PRB-278P; Covance), anti-Nestin (PRB-315C; Covance), anti-Map2 (#M2320; Sigma-Aldrich), and anti-Ctip2 (ab18465; Abcam). The following antibodies were used for Western blot assays: anti-Shank3 (sc30193; Santa Cruz), anti-Shank3 (sc 23547; Santa Cruz), anti-PSD95 (ab2723; Abcam), anti-Homer (#160011; Synaptic Systems), anti-NLGN1 (SAB1407153; Sigma-Aldrich), anti-PIKE (#07-675; Upstate), anti-Akt (#4691S; Cell Signaling), anti-phospho Akt (#4058; Cell Signaling), anti-mTOR (#4691; Cell Signaling), anti-phospho mTOR (#2971; Cell Signaling), anti-Jip2 (N135/37; NeuroMab), anti-NRP1 (SAB1411572; Sigma-Aldrich), anti-JNK1/3 (sc474; Santa Cruz), anti-phosphor JNK (#V793A; Promega), anti-DCX (#4604; Cell Signaling), anti-NeuN (#MAB377; EMD Millipore), anti-Tuj1 (#903401; BioLegend), anti-GAPDH (sc 47724; Santa Cruz), and anti-Actin (sc1616; Santa Cruz). Western blot quantification was performed using ImageJ.
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5

Immunostaining and Confocal Imaging of Synaptic Proteins

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Cells were stained as described53 (link). The following primary antibodies were used: anti-vesicular glutamate transporter-1 (VGLUT1, #135 304; Synaptic Systems, Gottingen, Germany), anti-Homer (#160011; Synaptic Systems), anti-vesicular GABA transporter (VGAT; #131003, Synaptic System), anti-Gephyrin (#147011; Synaptic System), anti-β-catenin (#PA5–19469; Thermo-Fisher Scientific), and guinea pig anti-Iba1 (#234004; Synaptic Systems). Fluorescently conjugated secondary antibodies were from Molecular Probes (Thermo-Fischer Scientific). Image acquisitions were performed using a confocal microscope (SP8, Leica Microsystems, Wetzlar, Germany) at ×63 (1.4 NA) magnification. Z-stacks were acquired every 300 nm, 10 fields/sample. 4,6-Diamidino-2-phenylindole staining was used to stain nuclei. The colocalization analysis was performed by evaluating the labeling of the VGLUT1/Homer1 or VGAT/Gephyrin synaptic protein couples. Co-localization puncta with areas of 0.1–2 mm2 were considered bona fide synaptic boutons. Synaptic boutons along neurites were manually counted on 30 μm stretches starting from the cell body.
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