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4 protocols using sc 6059

1

Comprehensive Immunohistochemical Profiling

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IHC was performed with antibodies directed against B220/CD45R (RA3-6B2; R&D Systems; 1:40 dilution), CD138 (281-2; BD Biosciences; 1:50 dilution), CD3 (A0452; DAKO; 1:100 dilution), myeloperoxidase (A0398; DAKO; 1:100 dilution), Ki-67 (RM-9106-S1; Thermo Fisher Scientific; 1:200), Bcl6 (sc-858; Santa Cruz Biotechnology; 1:50), Irf4 (sc-6059; Santa Cruz Biotechnology; 1:100), and Pten (M362729-2; Agilent; 1:150 dilution). Pre-treatment of sections was conducted with EDTA for 20 min (B220, CD138, CD3, myeloperoxidase), 30 min (Ki-67, Irf4, Pten), or 40 min (Bcl6).
We used goat anti-rabbit, rabbit anti-rat, rabbit anti-goat, and rabbit anti-mouse secondary antibodies (AffiniPure Goat Anti-Rabbit IgG (H+L) [111-005-003; Jackson ImmunoResearch], AffiniPure Rabbit Anti-Rat IgG [312-005-045; Jackson ImmunoResearch], Rabbit Anti-Goat IgG [P0449; DAKO], and Rabbit Anti-Mouse IgG [ab125904; Abcam]).
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2

Protein and Cytokine Analysis of Primary Cells

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Primary cell cultures were homogenized in NP40 buffer (Beyotime, China) supplemented with a protease inhibitor cocktail (Roche). The cell lysates were subjected to Western blotting using the anti‐IRF4 (1:500, sc‐6059, Santa Cruz), anti‐TNF‐α (1:500, AF‐510‐NA, R&D), anti‐MBP (1:500, MAB382, Chemicon), anti‐EZH2 (1:500, ab3748, Abcam), and HRP‐conjugated anti‐GAPDH (Kangcheng, Shanghai, China) antibodies. The protein bands were analyzed using Image Lab analysis (Bio‐Rad).
The TNF‐α, IL‐1β, and IGF‐1 levels in the supernatants were detected using an ELISA according to the manufacturer's instructions (EK2822, EK201B2, Multi Sciences, Hangzhou, China; MG100, R&D). The sample concentrations were calculated using an equation generated from a standard curve.
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3

Regulation of IRF4 by PGC-1α

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HEK293T cells were transfected with IRF4, PGC-1α, or both. Cell lysates were collected in RIPA buffer 48h after transfection. IRF4 protein was immunoprecipitated using anti-IRF4 antibody (sc-28696; Santa Cruz). IRF4 was western blotted using anti-IRF4 antibody (sc-6059; Santa Cruz) and anti-PGC-1α antibody (AB3242; Millipore).
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4

Western Blot Analysis of Protein Markers

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Proteins were extracted with lysis buffer (Tri-HCl (pH 7.4), 150 mM NaCl, 1 mM EDTA, 1% NP-40, 0.5% NaDOC, 0.1% SDS, 1 mM Na3VO4, 1 mM phenylmethylsulphonyl fluoride, 1 μg ml−1 pepstatin, 1 μg ml−1 aprotinine and 10 μg ml−1 leupeptine) for 20 min on ice, and protein amounts were quantified using Micro BCA Protein Assay Reagent (23235; Pierce Chemical Co.). Whole-cell lysates (40 μg per lane) were resolved on SDS–polyacrylamide gels, electrotransferred onto polyvinylidene difluoride membranes and examined by immunoblot analysis. The primary antibodies used were anti-PAX5 (610862; BD PharMingen), anti-BCL6 (#4242; Cell Signaling), anti-c-MYC (NB600-302C; Novus Biologicals), anti-IRF4 (sc-6059; Santa Cruz), anti-BLIMP1 (NB600-235; Novus Biologicals), anti-XBP1 (sc-7160; Santa Cruz), anti-HO-1 (NBP1-97507; Novus Biologicals), anti-AID (provided by Dr Alt) and anti-GAPDH (#2118; Cell Signaling). Full-sized scans of all western blots shown in Figs 3 and 6 and Supplementary Figs 11 and 12 are provided in Supplementary Fig. 14. Quantification of intensity was performed using an Image J (http://imagej.nih.gov/ij/).
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