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4 protocols using anti evi1

1

EVI1 Chromatin Immunoprecipitation Assay

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Chromatin immunoprecipitation was done with anti-EVI1 (#2593), IgG (#7076) and H3 (#9715) antibodies from Cell Signaling Technology (CST, Danvers, MA, USA) with the EZ-ChIP kit (#17–371) from Millipore (Etobicoke, ON, Canada) as directed. EVI1 binding enrichment at the +1379bp and -1000bp (negative control) sites was examined using quantitative PCR as previously described (Dzneladze et al., 2015). The following primers were used: EVI1 +1379bp 5’-TACCTTTGAACGGCTCCATC-3’ (sense) and 5’- CCCACTTCCTAGCCCCTAAC-3’ (antisense); EVI1 -1000bp 5’- TACTGGAAAACCCGGTAGG-3’ (sense) and 5’- CTGACAGGAAGGAGATATGCAA-3’ (antisense).
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2

Antibody Sources for Protein Analysis

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Specific antibodies were purchased from the following commercial sources: Anti-AFP, anti-ALB, anti-CD44, anti-Evi1, anti-flag (mouse), anti-HA, anti-HNF4α, anti-H3, anti-H3K36me3, anti-Myc, anti-OCT4A, anti-P300, anti-PPM1A (rabbit), anti-pSmad2 (S465/467), anti-pSmad2 (S245/250/255), anti-pSmad3 (s423/425), anti-Smad2, anti-Smad3 (rabbit), anti-SnoN, anti-Sox2, anti-TAT, and normal rabbit IgG from Cell Signaling Technology (Danvers, MA); anti-PPM1A (mouse), anti-SC35, and anti-SETD2 were from Abcam (Cambridge, MA); Anti-Smad4 and normal mouse IgG were from Santa Cruz Biotechnology (Santa Cruz, CA); Anti-β-actin, and anti-flag (rabbit) from Sigma-Aldrich (St. Louis, MO); Alexa594 goat anti-mouse IgG from Life Technology (Carlsbad, CA); Dylight488 goat anti-rabbit IgG from Vector Labs (Burlingame, CA).
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3

ChIP-seq assay for EVI1 transcription factor

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Assays were prepared using 107 cells of each cell line per condition. Chromatin was fragmented by sonication (Bioruptor, Diagenode, Denville, NJ, USA) for 30 min (30-s pulses, 30-s pauses) and assays were carried out following the manufacturer's protocol (kch-mahigh-A16, HighCell# ChIP Kit, Diagenode), using anti-EVI1 (#2593, Cell Signaling Technology) or an equal amount of IgG isotype as negative control (#2729, Cell Signaling Technology). The amount of DNA was analyzed by real-time polymerase chain reactions using SYBR Green-based assays (Applied Biosystems, Life Technologies, Foster City, CA, USA). The results were calculated using the ΔCt method. A genomic region of the GAPDH gene was used as negative control (Diagenode). The corresponding human genome coordinates, EVI1-binding sites and primers designed for the assays are detailed in Supplementary Table 5. Whole-genome ChIP data were obtained by hybridization to SurePrint G3 Human Promoter 1x1M microarrays (IRB Core Facility) and analyzed by MACS (version 2.0.9).60 (link) The data have been deposited under the GEO reference GSE50905. The complete ranking of differential EVI1 binding between adapted and sensitive MCF7 or HCC1937 cells was used as input for the GSEA of transcription factor targets.
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4

Immunohistochemistry of Pancreatic Tissues

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Pancreas tissue and cell pellets were fixed overnight at room temperature in 10% neutral-buffered formalin (KliniPath, Olen, Belgium). Next, samples were washed twice with PBS, dehydrated, and embedded in paraffin. Sections of 4 µm thickness were cut. Automated stainings were performed on the Leica Bond RX™. Primary antibodies used are: anti-EVI-1 (1/1000, C50E12, Cell Signaling Technology, Danvers, MA, USA), anti-cleaved caspase 3 (1/200, 9661, Cell Signaling Technology), anti-CD3 (1/50, A0452, Agilent), anti-Krt19 (1/100, TromaIII, Developmental Studies Hybridoma Bank, Iowa City, IA, USA), anti-F4/80 (1/100, APC clone BM8.1, Sigma-Aldrich), anti-CD142 (1/100, AF2419, Bio-techne, Minneapolis, MN, USA), anti-Krt19 (1/20, M0888, Agilent, Santa-Clara, CA, USA), anti-CD19 (1/500, ab245235, Abcam), anti-collagen IV (1/500, 1340-01, Southern Biotechnology Associates) Trichrome Masson’s staining was performed automated at the Pathology Department of UZ Brussel, Brussels, Belgium. DNA staining was performed with DAPI (Agilent) or Hoechst.
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