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2 protocols using nf κb oligonucleotide

1

NF-κB Activation and Apoptosis Assay

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NF-κB oligonucleotide: Promega, Mannheim, Germany; [γ33P]ATP: Hartmann Analytic, Braunschweig, Germany; T4 polynucleotide kinase: New England Biolabs, Frankfurt, Germany; William's medium E, L-glutamine and DMEM: Biochrome, Berlin, Germany; LightCycler 480 Probes Master, penicillin-streptomycin, poly(dI-dC), cOmplete EDTA free protease inhibitor cocktail, PhosSTOP phosphatase inhibitor cocktail, 0.45 µm PVDF membrane and Cell Death Detection ELISAPLUS Kit: Roche, Mannheim, Germany; Quantikine Cytochrome c ELISA, recombinant IL-1β and recombinant TNFα: R&D Systems, Minneapolis, USA; RNeasy Plus Mini Kit and QuantiTect Reverse Transcription Kit: Qiagen, Hilden, Germany; primer and probes for quantitative RT-PCR 2: Sigma, Steinheim, Germany; actinomycin D (ActD): Enzo Life Sciences, Lörrach, Germany; p38 inhibitor RN3503 and JNK inhibitor SP600125: Prof. S. Laufer, University of Tübingen, Germany; Bradford Quick Start Dye: Bio-Rad Laboratories, Munich, Germany; ECL western blotting detection reagents, GE Healthcare, Little Chalfont, UK; pJNK, JNK, PARP, XIAP, A20/TNFAIP3, α-tubulin, pro-caspase-3 and cleaved caspase-3 antibodies: Cell Signaling, Danvers, USA; horseradish peroxidase conjugated anti-rabbit and anti-mouse secondary antibodies: Jackson Immuno Research, Newmarket, UK.
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2

NF-κB Activation Assay in Cells

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RINm5F cells were pretreated with varying doses of celastrol for 1 h, and then stimulated with cytokines (5 ng/ml IL-1β, 10 ng/ml TNF-α, and 10 ng/ml IFN-γ) for 30 min. Nuclear extracts were prepared, and the EMSA was performed as described previously (24) (link). Nuclear extracts (10 μg) were incubated with 32P-end labeled double-stranded NF-κB oligonucleotide (5'-AGT TGA GGG GAC TTT CCC AGG C-3'; Promega) in binding buffer (10 mM Tris-HCl, pH 8.0, 75 mM KCl, 2.5 mM MgCl2, 0.1 mM EDTA, 10% glycerol, 0.25 mM DTT, and 1 μg of poly dI/dC) for 30 min. The DNA-protein complexes were analyzed by electrophoresis on a 6% native polyacrylamide gel in TBE buffer (89 mM Tris-HCl, 89 mM boric acid, and 2 mM EDTA). Then, the gels were dried and examined by autoradiography.
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