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5 protocols using bs 0480r

1

Comprehensive Molecular Profiling of Samples

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For immunohistochemistry, immunofluorescence, and Western blot, the following antibodies were used according to the manufacturers' instructions: mouse anti-TNF alpha (TNF-α, ab1793; Abcam), rabbit anti-IFN-γ (bs-0480R; Bioss), anti-MPO (22225-1-AP; Proteintech), anti-alpha smooth muscle actin (α-SMA, ab124964; Abcam), anti-transferrin receptor (TFR; ab214039; Abcam), anti-GPX4 (ab125066; Abcam), anti-SLC7A11 (PA1-16893; Invitrogen), anti-GAPDH (60004-1-Ig; Proteintech), goat anti-rabbit IgG H&L (HRP; ab205718; Abcam), HRP-conjugated affinipure goat anti-mouse IgG (H+L; SA00001-1; Proteintech), and goat anti-rabbit IgG H&L (Alexa Fluor 488; ab150077; Abcam) antibodies.
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2

Immunohistochemical Analysis of Bone and Immune Markers

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Tissue was fixed with 4% paraformaldehyde, embedded in paraffin, and sectioned at a thickness of 4-6 μm. Following routine procedures including quenching of endogenous peroxidase and antigen retrieval, the sections were incubated with rabbit polyclonal antibodies against osteocalcin (1:100 dilution, ab93876; Abcam, Cambridge, UK), CD3 (1:100 dilution, 17A2; Biolegend, San Diego, CA, USA), or IFN-γ (1:100 dilution, bs-0480R; Bioss, Woburn, MA, USA). After washing, the sections were incubated for 30 min with biotin-conjugated goat anti-rabbit (1:500 dilution, BA-1000; Vector, Burlingame, CA, USA) or mouse IgG (1:500 dilution, BA-9200; Vector, Burlingame, CA, USA). Tissue sections were visualized using and avidin-horseradish peroxidase (HRP) and 3,3′-diaminobenzidine (DAB), followed by counterstaining with hematoxylin. Images were acquired under a microscope.
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3

Antibody Selection and Dilution for Cellular Analysis

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Antibodies against PD-L1 (A11273, dilution for western blot, 1:1000; dilution for IHC analysis, 1:100; dilution for IF analysis, 1:100) and STAT3 (A11867, dilution for western blot, 1:1000; dilution for IF analysis, 1:100) were obtained from ABclonal (Wuhan, China). Antibodies against CD163 (bs-2527R, dilution for IHC analysis, 1:100), CD206 (bs-4727R, dilution for IHC analysis, 1:100), iNOS (bs-2072R, dilution for IHC analysis, 1:100) and IFNγ (bs-0480R, dilution for IHC analysis, 1:100) were obtained from Bioss (Beijing, China). Antibodies against Phospho-STAT3 (Tyr705) (9145S, dilution for western blot, 1:1000; dilution for IHC analysis, 1:100; dilution for IF analysis, 1:100; dilution for ChIP, 1:100) were obtained from Cell Signaling Technology (USA). Antibodies against β-actin (TA-09, dilution for western blot, 1:2000), peroxidase-conjugated goat anti-rabbit IgG (ZB-2301, dilution for western blot, 1:5000) and Peroxidase-conjugated goat anti-mouse IgG (ZB-2305, dilution for western blot, 1:5000) were obtained from ZSGB‐BIO (Beijing, China). Alexa Fluor 594 donkey anti-rabbit IgG (A21207, dilution for IF analysis, 1:1000) and Alexa Fluor 488 donkey anti-mouse IgG (A21202, dilution for IF analysis, 1:1000) were obtained from Invitrogen (USA).
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4

Histopathological Evaluation of Lung Tissue

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Freshly harvested tissues were fixed with phosphate-buffered formalin for a minimum of 48 h and then embedded in paraffin wax for histological analysis. The slides were stained with hematoxylin and eosin stain (H&E), and the images were captured as previously published [12 (link)]. Four to six images per section of each lung were scored blindly. For each sample, histologic evidence of pathology was classified in terms of the presence of infiltrated immune cells, lipid droplets, and foamy macrophages and was graded on a 7-point scale ranging from 0 to 6. Auramine-rhodamine (AR) staining of the lung and adipose tissue sections was performed, and the images were captured [4 (link)]. Four to six images per section of each lung were quantitated for fluorescence intensity by Image J. Immunohistochemical analysis (IHC) was performed on the formalin-fixed lung using CD4 specific rabbit polyclonal antibody (#NBP1-19371, Novus Biologicals), CD8 specific rabbit polyclonal antibody (#NBP2-29475, Novus Biologicals), F4/80-specific rabbit polyclonal (#ab100790, Abcam), and IFNγ-specific rabbit polyclonal antibody (#BS-0480R, Bioss Antibodies) as described earlier [13 (link)]. We analyzed the antibody-stained slides with semi-quantitative scoring system and graded them on a 7-point scale ranging from 0 to 6.
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5

Immunofluorescent Visualization of IFN-γ in Corneal Sections

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Corneas were enucleated, embedded in Tissue-Tek O.C.T. compound, and snap frozen in liquid nitrogen. Sections of 5 µm thickness were cut and mounted on glass slides coated with Poly-L-lysine, fixed in 4% paraformaldehyde, and blocked with PBS containing 2% BSA for 1 hour at room temperature. Then, sections were incubated with rabbit anti-mouse IFN-γ (catalog no. bs-0480R; Bioss; 1:200), followed by the Alexa Fluor 488-conjugated goat anti-rabbit IgG (catalog no. ab150077; Abcam; 1:500) secondary antibody. 4′, 6-diamidino-2-phenylindole dihydrochloride (DAPI; catalog no. 32670; Sigma-Aldrich, Darmstadt, Germany) was used to counterstain the cell nuclei. Slides were washed three times with PBS and visualized by Olympus DP72 fluorescent microscopy.
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