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3 protocols using un scan it gel version

1

Quantification of Hippocampal Proteins

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Protein concentration in hippocampal extracts from mice and human tissue was
measured using the BCA Protein Assay Kit (Cole-Parmer). Forty micrograms of
protein/lane were electrophoretically separated on a 12% SDS polyacrylamide gel
and electrically transferred onto a Hybond-P PVDF transfer membrane (Millipore)
for 1 h. Membranes were blocked in PBS-milk 5% at RT for 1 h. Next, membranes
were incubated in block solution overnight with the following primary
antibodies: mouse anti-glutamine synthetase (1:500; Abcam), mouse anti-GAPDH
(1:1,000; Abcam), rabbit anti-Cyclophilin B (1:1,000; Sigma) and rabbit
anti-β-actin (1:1,000; Abcam). Membranes were incubated for 1 h with IRDye 680CW
goat anti-mouse antibody, IRDye 800CW goat anti-mouse antibody, or IRDye 800CW
goat anti-rabbit antibody (LI-COR, 1:20,000), then scanned with an Odyssey
infrared imaging system (LI-COR) and analyzed using Un-Scan-It gel version 6.1
(Silk Scientific).
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2

Quantitative Western Blot Analysis

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Protein concentrations were determined using the BCA protein assay (Cat# PI23225, Thermo Fisher Scientific, Waltham, MA). Indicated samples were loaded on 4-20% Novex® gels (Cat# EC60285BOX, Thermo Fisher Scientific, Waltham, MA). Proteins were transferred for 1h at 120 V using TGS (25mM Tris pH=8.5, 192mM glycine, 0.1% (mass/vol) SDS), 20% (vol/vol) methanol as transfer buffer to polyvinylidene difluoride (PVDF) membranes 0.45μm (Cat# IPVH00010, Millipore, Billerica, MA), pre-activated in pure methanol. After transfer, the membranes were blocked at room temperature for 1 hour with TBST (50 mM Tris-HCl, pH 7.4, 150 mM NaCl, 0.1 % Tween 20), 5% (mass/vol) non-fat dry milk, then incubated separately in the primary antibodies VEGFR2 (Cat#PA5-16487, ThermoFisher), pY1175 VEGFR2 (Cat#PA5-105167, ThermoFisher), Flotilin (Cat#F1180, Sigma) or Neuropilin-1 (Cat#sc-5307, Santa Cruz biotechnology) in TBST, 5% (mass/vol) BSA, overnight at 4°C. Following incubation in horseradish peroxidase-conjugated secondary antibodies from Jackson immunoresearch, blots were revealed by enhanced luminescence (WBKLS0500, Millipore, Billerica, MA) before exposure to photographic film. Films were scanned, digitized, and quantified using Un-Scan-It gel version 7.1 scanning software by Silk Scientific Inc.
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3

Quantification of VEGFR2 Signaling Cascade

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Protein concentrations were determined using the BCA protein assay (Cat# PI23225, Thermo Fisher Scientific, Waltham, MA). Indicated samples were loaded on 4–20% Novex® gels (Cat# EC60285BOX, Thermo Fisher Scientific, Waltham, MA). Proteins were transferred for 1h at 120 V using TGS (25mM Tris pH=8.5, 192mM glycine, 0.1% (mass/vol) SDS), 20% (vol/vol) methanol as transfer buffer to polyvinylidene difluoride (PVDF) membranes 0.45μm (Cat# IPVH00010, Millipore, Billerica, MA), pre-activated in pure methanol. After transfer, the membranes were blocked at room temperature for 1 hour with TBST (50 mM Tris-HCl, pH 7.4, 150 mM NaCl, 0.1 % Tween 20), 5% (mass/vol) non-fat dry milk, then incubated separately in the primary antibodies VEGFR2 (Cat#PA5–16487, ThermoFisher), pY1175 VEGFR2 (Cat#PA5–105167, ThermoFisher), Flotilin (Cat#F1180, Sigma) or Neuropilin-1 (Cat#sc-5307, Santa Cruz biotechnology) in TBST, 5% (mass/vol) BSA, overnight at 4°C. Following incubation in horseradish peroxidase-conjugated secondary antibodies from Jackson immunoresearch, blots were revealed by enhanced luminescence (WBKLS0500, Millipore, Billerica, MA) before exposure to photographic film. Films were scanned, digitized, and quantified using Un-Scan-It gel version 7.1 scanning software by Silk Scientific Inc.
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