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5 protocols using nunc lab tek 2 8 well chamber slide system

1

Immunofluorescence Staining of GFAP

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Cells were plated in Nunc Lab-Tek II Chamber slide system (8-well) (ThermoFischer Scientific). Slides were fixed with 4% paraformaldehyde in 2% bovine serum albumin (BSA) for 15 min at room temperature, followed by washing three times with PBS. Cells were permeabilized by 0.05% Triton X-100, 2% BSA, 5% normal goat serum (NGS) in PBS followed by 3 PBS washes. Slides were blocked with 2% BSA, 5% NGS in PBS for 1 hour, followed by overnight incubation with anti-GFAP rabbit monoclonal antibody (Cell Signalling #12389) at 1:200 dilution in blocking solution. Cells were washed 3 times with PBS and incubated for 1 hour with 1:500 dilution of Goat anti-rabbit IgG cross-adsorbed secondary antibody, Alexa Fluor 488 (ThermoFischer Scientific) in blocking solution. Slides were washed 3 times in PBS and Prolong Gold antifade reagent with DAPI (Invitrogen) was applied. Slides were photographed with Zeiss LSM780 Laser Scanning Confocal Microscope at 20X and 63X magnification.
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2

Immunofluorescence Staining of GFAP

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Cells were plated in Nunc Lab-Tek II Chamber slide system (8-well) (ThermoFischer Scientific). Slides were fixed with 4% paraformaldehyde in 2% bovine serum albumin (BSA) for 15 min at room temperature, followed by washing three times with PBS. Cells were permeabilized by 0.05% Triton X-100, 2% BSA, 5% normal goat serum (NGS) in PBS followed by 3 PBS washes. Slides were blocked with 2% BSA, 5% NGS in PBS for 1 hour, followed by overnight incubation with anti-GFAP rabbit monoclonal antibody (Cell Signalling #12389) at 1:200 dilution in blocking solution. Cells were washed 3 times with PBS and incubated for 1 hour with 1:500 dilution of Goat anti-rabbit IgG cross-adsorbed secondary antibody, Alexa Fluor 488 (ThermoFischer Scientific) in blocking solution. Slides were washed 3 times in PBS and Prolong Gold antifade reagent with DAPI (Invitrogen) was applied. Slides were photographed with Zeiss LSM780 Laser Scanning Confocal Microscope at 20X and 63X magnification.
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3

Fluorescent Micelle Visualization in Cells

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To obtain fluorescent micelles, DiD was dissolved in macrophage media to 5 µM and pluronic L101 added to a final concentration of 0.01% (w/v). RAW 264.7 and THP-1 cells (seeded at 2 × 104 cell per well in a Nunc™ Lab-Tek™ II 8 well chamber slide system, 12-565-8, Thermo Scientific, Waltham, MA, USA) were treated with DiD-loaded micelles, or with DiD alone for 30 min. The cell membrane was stained using MemBrite® Fix Staining (30095, Biotium, Fremont, CA, USA) following the manufacturer’s instructions. Cells were fixed in 2% paraformaldehyde, and permeabilized with 0.1% Triton-X (X100; Sigma-Aldrich, St. Louis, MO, USA). Cells were then stained with 0.0012 µM DAPI (D3571; Invitrogen, Carlsbad, CA, USA) and mounted with ProLong™ Gold Antifade Mountant (P36930, Thermo Scientific, Waltham, MA, USA). Three-dimensional image acquisition was done using a LSM 780 laser scanning confocal microscope (Carl Zeiss Microscopy, Jena, Germany). Three-dimensional reconstructions were carried out using Imaris v9.5.0 (Bitplane AG, Zürich, Switzerland).
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4

Osteoclastogenesis Modulation by AdipoRon

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For osteoclastogenesis, a total of 1 × 104 RAW 264.7 (ATCC) cells were seeded per well on 24-well plates in 500 μl αMEM containing 5% FCS (Hyclone, GE Healthcare), 1% penicillin-streptomycin (Gibco) as well as 50 μM β-mercaptoethanol (Gibco) and 30 ng/ml murine RANKL (R&D Systems). To study the impact of AdipoRon on osteoclast differentiation, 10 μM AdipoRon (Sigma-Aldrich) were added to the culture medium. Tartrate-resistant acid phosphatase (TRAcP) activity was examined using the leucocyte acid phosphatase kit (Sigma-Aldrich) according to manufacturer’s specifications. TRAcP+ cells with ≥3 nuclei were considered as osteoclasts. In addition, 5 × 103 RAW 264.7 cells were seeded per well in a Nunc Lab-Tek II 8-well Chamber Slide system (ThermoFisher Scientific) in a total of 300 μl osteoclast differentiation medium containing 30 ng/ml RANKL. Fully differentiated osteoclasts were treated with 10 μM AdipoRon for the indicated time points. FACS analysis as well as sorting of mature OCLs for subsequent Western-blot analyses was performed as described previously (Madel et al., 2018 ).
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5

Osteoclastogenesis Protocol with AdipoRon

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For osteoclastogenesis, a total of 1x10 4 RAW 264.7 (ATCC) cells were seeded per well on 24well plates in 500 µl αMEM containing 5% FCS (Hyclone, GE Healthcare), 1% penicillinstreptomycin (Gibco) as well as 50 μM β-mercaptoethanol (Gibco) and 30 ng/ml murine RANKL (R&D Systems). To study the impact of AdipoRon on osteoclast differentiation, 10 µM AdipoRon (Sigma-Aldrich) were added to the culture medium. Tartrate-resistant acid phosphatase (TRAcP) activity was examined using the leucocyte acid phosphatase kit (Sigma-Aldrich) according to manufacturer's specifications. TRAcP + cells with ≥3 nuclei were considered as osteoclasts. In addition, 5x10 3 RAW 264.7 cells were seeded per well in a Nunc
Lab-Tek II 8-well Chamber Slide system (ThermoFisher Scientific) in a total of 300 µl osteoclast differentiation medium containing 30 ng/ml RANKL. Fully differentiated osteoclasts were treated with 10 µM AdipoRon for the indicated time points. FACS analysis as well as sorting of mature OCLs for subsequent Western-blot analyses was performed as described previously (Madel et al., 2018) (link).
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