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3 protocols using p stat3

1

Immunohistochemical Analysis of Mammary Tumors

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For immunohistochemical analysis of mammary tumors, tumors were dissected and fixed in buffered formalin solution for 48 hours. Tissues were embedded in paraffin, and 4-μm sections of the entire block were prepared. After deparaffinization and rehydration, sections were subjected to antigen retrieval in tris/EDTA buffer (pH 8.0) at 120°C for 5 min. Sections were blocked with 1.5% (v/v) horse (Ki67) or goat (p-STAT-1, p-STAT-3, and CD3) serum in PBS for 30 min at room temperature and incubated overnight (4°C) with p-STAT-1 (Tyr701) (1:500; Cell Signaling Technology), p-STAT-3 (Tyr705) (1:200; Cell Signaling Technology), Ki67- (1:400; clone #8D5, Cell Signaling Technology), or CD3-positive cells (1:200; Abcam). After washing with PBS, p-STAT-1, p-STAT-3, Ki67-, or CD3-positive cells were visualized using rabbit (p-STAT-1, p-STAT-3, and CD3) or mouse (Ki67) IgG VECTORSTAIN ABC Elite and DAB Peroxidase Substrate Kits (Vector Laboratories, UK). Sections were counterstained with hematoxylin and imaged on an Olympus CX43 microscope (Olympus, Tokyo, Japan).
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Immunolocalization of Uterine Markers

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Immunolocalization of Ki67, CD31, ESR1, PGR, p-IKK, p-STAT3, CD68, CD163, COX2, iNOS, MMP9 and p-AKT was determined in cross-sections (5 μm) of paraffin-embedded uterine sections using specific primary antibodies and a Vectastain Elite ABC Kit (Vector laboratories, Burlingame, CA, USA) or DyLight-conjugated secondary antibody (Jackson ImmunoResearch Lab, West Grove, PA, USA). Antibodies used in these analyses were: anti-CDH1 (1:120 dilution, 610181, BD Biosciences, San Jose, CA, USA), anti-Ki67 (1:200 dilution, 550609, BD Biosciences), anti-CD31 (1:100 dilution, ab28364, Abcam, Cambridge, MA, USA), anti-ESR1 (1:100 dilution, sc-542, Santa Cruz Biotechnology, Santa Cruz, CA, USA), anti-PGR (1:200 dilution, RB-9017-P0, Thermo Scientific, Rockford, IL, USA), p-IKK (1:150 dilution, 2697, Cell Signaling Technology, Danvers, MA, USA), p-STAT3 (1:50 dilution, 9145, Cell Signaling Technology), CD68 (1:300 dilution, ab955, Abcam), CD163 (1:300 dilution, ab126756, Abcam), COX2 (1:50 dilution, RM-9121, Thermo Scientific), iNOS (1:50 dilution, 610333, BD Biosciences), MMP9 (1:50 dilution, 3852, Cell Signaling Technology), and p-AKT (1:200 dilution, 3787, Cell Signaling Technology).
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Immunolocalization of Uterine Markers

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Immunolocalization of Ki67, CD31, ESR1, PGR, p-IKK, p-STAT3, CD68, CD163, COX2, iNOS, MMP9 and p-AKT was determined in cross-sections (5 μm) of paraffin-embedded uterine sections using specific primary antibodies and a Vectastain Elite ABC Kit (Vector laboratories, Burlingame, CA, USA) or DyLight-conjugated secondary antibody (Jackson ImmunoResearch Lab, West Grove, PA, USA). Antibodies used in these analyses were: anti-CDH1 (1:120 dilution, 610181, BD Biosciences, San Jose, CA, USA), anti-Ki67 (1:200 dilution, 550609, BD Biosciences), anti-CD31 (1:100 dilution, ab28364, Abcam, Cambridge, MA, USA), anti-ESR1 (1:100 dilution, sc-542, Santa Cruz Biotechnology, Santa Cruz, CA, USA), anti-PGR (1:200 dilution, RB-9017-P0, Thermo Scientific, Rockford, IL, USA), p-IKK (1:150 dilution, 2697, Cell Signaling Technology, Danvers, MA, USA), p-STAT3 (1:50 dilution, 9145, Cell Signaling Technology), CD68 (1:300 dilution, ab955, Abcam), CD163 (1:300 dilution, ab126756, Abcam), COX2 (1:50 dilution, RM-9121, Thermo Scientific), iNOS (1:50 dilution, 610333, BD Biosciences), MMP9 (1:50 dilution, 3852, Cell Signaling Technology), and p-AKT (1:200 dilution, 3787, Cell Signaling Technology).
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