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6 protocols using a 395

1

Chromatin Regulation Assay in Drosophila

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Sucrose (#S0389), NaCl (#S3014), CaCl2 (#C5670), MgCl2 (#M4880), KCl (#P9541), NaH2PO4 (#S3139), NaHCO3 (#S5761), and HEPES (#54457) were from Sigma-Aldrich. Hexanoic acid (Macklin, #H810882) for PER assay was purchased from Macklin. EED226 (5 μM, Selleck, #S8496), Chaetocin (5 μM, Selleck #S8068), and A-395 (10 μM, Sigma-Aldrich, #SML1923) were added to the standard medium. Flies were kept on these foods for 5 days before the assay (change fresh medium every 2 days).
The following antibodies were used: The antibodies against Histone H3 (di methyl K9) (#ab1220), acetyl histone-h3-k27 (#ab4729), Histone H3 (trimethyl K27) (#ab6002, #PTM-5002, #PTM-647RM), Histone H3 (trimethyl K9) (#ab8898), and Histone H3 antibody (#ab1791) were purchased from Abcam and Jingjie PTM BioLab. The secondary antibodies against rabbit (Alexa Fluor 633, #a21071, HRP-linked Antibody, #111-035-003) and mouse (Alexa Fluor 488, #a11001) were purchased from Jackson ImmunoResearch and Invitrogen. Fluoroshield with DAPI (#F6057) was purchased from Sigma-Aldrich.
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2

Chromatin Regulation Assay in Drosophila

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Sucrose (#S0389), NaCl (#S3014), CaCl2 (#C5670), MgCl2 (#M4880), KCl (#P9541), NaH2PO4 (#S3139), NaHCO3 (#S5761), and HEPES (#54457) were from Sigma-Aldrich. Hexanoic acid (Macklin, #H810882) for PER assay was purchased from Macklin. EED226 (5 μM, Selleck, #S8496), Chaetocin (5 μM, Selleck #S8068), and A-395 (10 μM, Sigma-Aldrich, #SML1923) were added to the standard medium. Flies were kept on these foods for 5 days before the assay (change fresh medium every 2 days).
The following antibodies were used: The antibodies against Histone H3 (di methyl K9) (#ab1220), acetyl histone-h3-k27 (#ab4729), Histone H3 (trimethyl K27) (#ab6002, #PTM-5002, #PTM-647RM), Histone H3 (trimethyl K9) (#ab8898), and Histone H3 antibody (#ab1791) were purchased from Abcam and Jingjie PTM BioLab. The secondary antibodies against rabbit (Alexa Fluor 633, #a21071, HRP-linked Antibody, #111-035-003) and mouse (Alexa Fluor 488, #a11001) were purchased from Jackson ImmunoResearch and Invitrogen. Fluoroshield with DAPI (#F6057) was purchased from Sigma-Aldrich.
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3

Synthesis and Characterization of Small-Molecule Inhibitors

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A-395 (SML1923) and A-395N
(SML1879) were
purchased from Sigma-Aldrich. EED226 (HY-101117) was purchased from
MedchemExpress. SAHA (S1047) was purchased from Selleckchem. Recombinant
human TNF-alpha (210-TA-020) was purchased from R&D Systems. UNC5679
(N-(furan-2-ylmethyl)-8-phenylimidazo[1,2-c]pyrimidin-5-amine) was synthesized as previously reported17 (link) to yield the desired product as a white solid
(6.6 mg) (see Supplemental Methods for
additional information).
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4

Generation and Characterization of Prostate Cancer Models

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Generation and molecular characterization of the CRPC (16DCRPC), ENZ-resistant AR+ NE-like (42DENZR and 42FENZR) and ENZ-resistant AR-driven (49CENZR and 49FENZR) tumours and cell lines: in brief, hormone-sensitive LNCaP cells serve as the backbone of the ENZ-resistance model, which was established through serial passaging of CRPC xenografts treated with ENZ24 (link),49 (link) (10 mg kg−1 d−1). These cell lines were cultured in RPMI-1640 containing 5% fetal bovine serum (FBS; Gibco A3160701), with the ENZ-resistant cell lines supplemented with 10 μmol l−1 ENZ for all experiments, unless otherwise noted. The LNCaP (ATCC 1740), C4–2 (ATCC 3314), VCaP (ATCC 2876) and NCI-H660 (ATCC 5813) cell lines were acquired from ATCC, LASCPC-1 cells were obtained from O. Witte (UCLA), and SKO (Ptenf/f), DKO (Ptenf/f/Rb1f/f) and TKO (Ptenf/f/Rb1f/f/Tp53f/f) GEMM cell lines were obtained from D. Goodrich (Roswell Park). The LASCPC-1 and NCI-H660 cell lines were cultured in HITES medium and GEMM cell lines were cultured in PrE medium. When indicated, cells were treated with the following inhibitors: GSK126 (Millipore 500580), GSK343 (Sigma SML0766), A-395 (Sigma SML1923) or RO-3306 (Sigma SML0569). Cultures were assessed for mycoplasma monthly, and all cell lines have been authenticated by short tandem repeat profiling.
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5

HDAC Inhibitor and Chemotherapeutic Agents

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HDAC inhibitors, TSA, Entinostat (MS-275), Romidepsin (FK228) and PCI-340510 as well as chemotherapeutics Doxorubicin and Vincristine were from Selleckchem (Houston, TX 77014 USA). A-395 was from Sigma-Aldrich (Munich, Germany). The compounds were dissolved in dimethylsulfoxide (DMSO) or DEPC-treated H2O, depending on the manufacturer’s instructions, and stored at − 20 °C.
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6

CRISPR/Cas9 Knockouts of HDAC1 and HDAC2 in EwS Cell Lines

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HDAC inhibitors, TSA, Entinostat (MS-275), Romidepsin (FK228) and PCI-340510 as well as chemotherapeutics Doxorubicin and Vincristine were from Selleckchem (Houston, TX 77014 USA). A-395 was from Sigma-Aldrich (Munich, Germany). The compounds were dissolved in dimethylsulfoxide (DMSO) or DEPC-treated H 2 O, depending on the manufacturer's instructions, and stored at -20°C. CRISPR/Cas9 knockouts CRISPR/Cas9 knockouts of HDAC1 and HDAC2 in EwS cell lines (SK-N-MC, EW7, CHLA-10) were generated using the lentiCas9-Blast vector (plasmid #52962; Addgene, Watertown, MA, USA) and lentiGuide-Puro (Addgene; plasmid #52963). The sgRNA sequence recommendations were used and synthesized from libraries for optimized sgRNA: Brunello and Brie, designed to maximize Rule Set 2 scores and minimize off-target sites with high CFD scores [27] . For lentiviral packaging the Trans-Lentiviral Packaging Kit (ThermoFisher Scienti c, Braunschweig, Germany) was used according to the manufacturer's instructions.
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