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7 protocols using prolong gold anti fade reagent with dapi

1

Immunohistochemical Analysis of Abdominal Arteries

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After blocked with BSA for 30 minutes, sections (5 μm) of abdominal arteries were incubated with rabbit anti‐COX‐2 (1:100, Abcam), mouse anti‐CD68 (1:100, Abcam) or mouse anti‐α‐SM actin (1:100, Sigma‐Aldrich) overnight at 4°C. After incubated with secondary antibodies, a drop of Prolong Gold anti‐fade reagent with DAPI (Vector Laboratories) was used to seal the coverslip. Images were acquired by laser scanning confocal microscopy (LSM 710, Zeiss).
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2

Immunocytochemistry of Cell Transfection

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Cells were plated into Millicell EZ SLIDE 8‐well glass (Millipore PEZGS0816) at a density of 2 ×104 cells/well and transfected with gapmers (Table S1) at 50 nM for 24 h. Cells were fixed in 4% PFA and blocked with blocking buffer (PBS/5% normal serum/0.3% Triton™ X‐100) at room temperature for 60 min. Cells on slides were incubated with primary antibody at the dilutions indicated in the next section in antibody dilution buffer (PBS/1% BSA/0.3% Triton™ X‐100) at 4°C overnight. After primary antibody incubation, the cells were incubated with fluorochrome‐conjugated secondary antibodies according to the manufacturer's instructions at room temperature for 1 h in the dark. The slides were then washed with PBS three times for 10 min each, then mounted with Prolong® Gold Antifade Reagent with DAPI (Vector Laboratories, H‐1200‐10).
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3

Immunofluorescence Imaging of HMGB1 and ICAM-1

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After stimulation, HUVECs were fixed in 4% paraformaldehyde and permeabilized in 0.1% Triton X-100/PBS for 5 min. After being blocked with BSA for 30 min, cells were incubated with the primary antibodies rabbit monoclonal anti-HMGB1 (1:1000, Abcam) and mouse monoclonal anti-ICAM-1 (1:500; Santa Cruz Biotechnology) overnight at 4°C. After being washed with TBS-T, cells were incubated with secondary antibodies (1:500; Jackson immunoresearch). A drop of Prolong Gold antifade reagent with DAPI (Vector Laboratories, CA, USA) was used to seal the coverslip. Images were acquired by laser scanning confocal microscopy (LSM 710; Carl Zeiss, Germany). Data were analyzed by use of Image-Pro Plus 6.0.
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4

Quantifying NF-κB Activation in Vascular Smooth Muscle

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Vascular smooth muscle cells were cultured, transfected with si‐NONO and stimulated with Ang II as explained earlier. Cells were fixed using 4% paraformaldehyde for 20 minutes and permeabilized in PBS with 0.1% Triton X‐100. Following the blocking with goat serum for 30 minutes at RT, samples were incubated with rabbit anti‐NF‐κB p65 (Cell Signaling Technology, 8424, 1:100) and mouse anti‐NONO (Santa Cruz, sc‐166702x, 1:100) antibodies overnight at 4°C. Alexa 488‐conjugated goat anti‐mouse IgG and Alexa 594‐conjugated goat anti‐rabbit IgG (Invitrogen) were used as the secondary antibodies. IgG and secondary antibodies were considered as negative controls. A droplet of Prolong Gold anti‐fade reagent with DAPI (Vector Laboratories) was added to fix the coverslip. Images were captured via laser scanning confocal microscopy (LSM 710, Zeiss).
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5

Immunofluorescence Staining of Cell Lines

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U2OS, HeLa, and NIH3T3 cells were plated on LabTek™ chamber slides (Thermo Fisher Scientific), and mESCs were plated on μ-Slide (ibidi). Cells were pre-extracted with CSK buffer (10 mM PIPES, 100 mM NaCl, 300 mM sucrose, 3 mM MgCl2, 1 mM EGTA, and 0.5% Triton X-100) for 10 min at 4°C and fixed with 4% paraformaldehyde for 20 min at room temperature. The fixed cells were incubated with the primary antibodies diluted in PBS supplemented with 10% fetal bovine serum for 1 h at room temperature. After three washes with 0.05% Triton X-100 in PBS, Alexa Fluor®–conjugated secondary antibodies (Thermo Fisher Scientific) were added and incubated for 30 min. Cells were mounted using ProLong® Gold antifade reagent with DAPI (Vector Laboratories).
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6

Germ Cell Identification in Chick Testis

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Immunohistochemistry was performed to identify the expression of GFP and DAZL in germ cells of DAZL::GFP chick testis. Testes of chicks at hatching day were paraffin‐embedded and sectioned (thickness, 9–10 μm). After deparaffinization, sections were washed three times with PBS and blocked with a blocking buffer (5% goat serum and 1% bovine serum albumin in PBS) for 1 h at room temperature. Sections were then incubated at 4 °C overnight with primary antibodies, rabbit anti‐GFP (Invitrogen, Thermo Fisher Scientific Inc., Carlsbad, CA, USA), or rabbit anti‐DAZL [16 (link)]. After washing three times with PBS, sections were incubated with fluorescence‐conjugated secondary antibodies (Alexa Fluor 488 or 568) for 1 h at room temperature. After washing three times, sections were mounted with ProLong Gold antifade reagent with DAPI (Vector Laboratories, Burlingame, CA, USA) and visualized on a fluorescence microscope.
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7

Immunofluorescence analysis of recombinant CL-K1

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CHO DG44 cells expressing and secreting recombinant full-length CL-K1 (see above) were cultivated in suspension in PowerCHO 2 serum free media (Lonza). The cells were transferred by cytospin onto Superfrost plus slides (Thermo Scientific) coated with polylysine. Cells were fixed with 1% PFA in PBS for 10 min at RT. After fixation, the cells were washed thrice with PBS before permeabilization with BD Perm/wash buffer containing Saponin (Becton Dickinson) for 15 min at RT. After permeabilization, cells were rinsed thrice with PBS and blocked for 1 hr. with PBS, 1% BSA and 0.3 % Trition-X-100. After blocking, cells were incubated with 1 μg Alexa 488 conjugated mAb 16-25 per ml blocking buffer and incubated for 2h at RT. The mAb:Alexa ratio was 1:25 and the conjugation was performed with (non-biotinylated) mAb in solution and not on beads. After incubation, the cells were rinsed in the blocking buffer, coverslips were mounted with Prolong Gold Antifade Reagent with DAPI (Vector Laboratories) and dried ON, before imaging on a confocal laser-scanning microscope (Olympus FV100 MPE). A 488 nm laser line was used to excite Alexa 488 mAb and 405 nm for DAPI.
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