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58 protocols using dihydrotestosterone

1

Platelet Activation Measurement Protocol

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LC–MS grade, acetonitrile (MeCN), methanol (MeOH), tetrahydrofuran (THF), dimethyl sulfoxide, MS grade formic acid (HCOOH) and all the analytical standards of testosterone, dihydrotestosterone, α-estradiol, β-estradiol, methyltestosterone, as well as the hormone preparations used for in vitro measurements of platelet activation/reactivity were obtained from Sigma (St. Louis, MO, USA) and had a minimum purity specification of 99%. Nitric acid (HNO3) was purchased from POCH (Gliwice, Poland). Dichloromethane (DCHM, HPLC grade) was provided by VWR International (Radnor, PA, USA).
PBS was from Avantor Performance Materials Poland S.A. (Gliwice, Poland). Arachidonate, equine tendon collagen and ADP were from Chrono-Log Corp. (Havertown, PA, USA). Fluorolabelled monoclonal antibodies (moAbs): anti-CD61/PerCP, antiCD62/PE, PAC-1/FITC, isotype controls IgG/PE and IgM/FITC, as well as CellFix (1% formaldehyde in PBS) were from Becton Dickinson (San Diego, CA, USA). Ultrapure water was obtained from Milli-Q purification system (Millipore, Bedford, MA, USA). Nitrogen (NM32LA Nitrogen Generator, Peak Scientific Instruments, Billerica, MA, USA) was used as a drying gas.
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2

Steroid Biomarker Quantification Protocol

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Calibrator stock solutions were prepared separately for each steroid by dissolving reference steroids in ethyl acetate. The stock solutions were then pooled to a calibrator standard solution and diluted in 50% methanol/ water. Eight calibrator working solutions were made within the calibration range presented in Supplementary Table 1 (4 (link)). Estradiol, estrone, dihydrotestosterone, progesterone, androstenedione, DHEA, and 17α-hydroxyprogesterone were purchased from Sigma-Aldrich (St. Louis, MO, USA). Testosterone was purchased from Fluka (Buchs, Germany). Calibration was performed by determining the peak area ratio between the target analyte and the isotope-labeled internal standard. Before each run, calibrator samples were freshly prepared by spiking 25 µL calibrator working solution to 225 µL of 0.5% BSA in PBS buffer. Internal standard stock solutions were made separately using 13C3-labeled versions of each steroid, except for DHEA that was labeled with d6. An internal standard working solution with labeled steroid concentrations in the middle of the calibration range was prepared in 50% methanol/water and aliquoted. All calibrator and internal standard stock and working solutions were stored at −80 °C until use.
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3

Prostate Cancer Cell Line Cultivation

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LNCaP, MDA-PCa-2b, and PC3 cell lines were acquired from ATCC (Manassas, VA, USA). PC3 and LNCaP cells lines were cultured in 10% fetal bovine serum (FBS), RPMI 1640, and 1% antibiotic-antimycotic. The MDA-PCa-2b cell line was cultured in BRFF-HPC1 media purchased from AthenaES (Baltimore, MD, USA) supplemented with 20% FBS. Dihydrotestosterone was acquired from Sigma-Aldrich (St. Louis, MO, USA). Androgen depleted media consisted of 10% charcoal stripped FBS with phenol red free RPMI 1640. Docetaxel was acquired from Sigma-Aldrich. Temsirolimus and SB202190 were purchased from Selleckchem (Houston, TX, USA). All other inhibitors were purchased from EMD Millipore (Billerica, MA, USA). Unless otherwise stated all other cell culture reagents were acquired from Invitrogen (Grand Island, NY, USA).
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4

Biosynthesis and Evaluation of Depsidones

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The depsidones Unguinol and Aspergillusidone D were provided by the Chulabhorn Research Institute and have been biosynthesized according to Sureram et al. [12 ]. The other compounds tested, i.e. 17β-estradiol (purity >98%), testosterone C-III (purity >98%), 5α-androstan-17β-ol-one C-III or dihydrotestosterone (purity 97.5%), colchicine (purity ±95%) and doxorubicin (purity >98%) were purchased from Sigma-Aldrich (Sigma-Aldrich, St. Louis, MO, USA). These compounds were dissolved and diluted in dimethyl sulphoxide (DMSO) Hybri-max from Sigma-Aldrich (St. Louis, MO, USA) and added to the exposure medium at <0.5% (v/v).
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5

Metastatic Pancreatic Cancer Organoid Establishment

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For identifying the HM-SE genes, 2 patients with PT and 2 patients with HM were enrolled for H3K27ac ChIP-Seq analysis (Table S1). The samples were obtained from Ruijin Hospital, Shanghai Jiaotong University School of Medicine. The study protocol was approved by the Research Ethics Committee of Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University. All enrolled participants consented to attend this cohort study and signed written informed consent. To create the metastatic patient-derived organoids (MDO), the fresh ccPDAC tissues were enzymatically digested and then treated for 1 hour at 37°C with 200 U/ml of deoxyribonuclease I (Roche) and collagenase type IV (SigmaAldrich) (Table S1). The cells plated in Basement Membrane (OuMel, #WM-MG-01) were filtered using a 70-m nylon mesh and and cultured by DMEM/F12 media containing 2% B27, N-acetyl-l-cysteine (SigmaAldrich, 1.25 mM), EGF (Gibco, 50 ng/mL), A83-01 (SigmaAldrich, 200 nM), Noggin (SigmaAldrich, 100 ng/mL), R-spondin 1 (SigmaAldrich, 500 ng/mL), Y-27632 (MedChemExpress, 10 mM), and dihydrotestosterone (SigmaAldrich, 1 nM).
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6

Prostate Cancer Compound Evaluation

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Apalutamide, darolutamide, dexamethasone, enzalutamide, mifepristone, OTX015, and JQ1 were purchased from Selleckchem. R1881, dihydrotestosterone (DHT), and beta-estradiol were purchased from Sigma-Aldrich. BET protein degrader ZBC260 and AR protein degrader ARD-61 were described previously (28 (link), 29 (link)).
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7

Stable Cell Lines for SLX4IP Study

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All cell lines were maintained at 37°C in 5% CO2 following acquisition from ATCC. LAPC4 cells were grown in IMDM (Sigma) supplemented with 10% (v/v) FBS (Sigma) and 1 nM dihydrotestosterone (Sigma). C4–2B, CWR-R1, 22Rv1, DU145, and PC-3 cells were grown in RPMI1640 (Gibco) supplemented with 10% FBS and 1% of Penicillin 10 000 units/mL, Streptomycin 10 000 μg/mL, and 25 μg/mL Amphotericin B mixture (Antibiotic-Antimycotic, Gibco). HEK293T, HCT116, and U2OS cells were grown in DMEM (Gibco) supplemented with 10% (v/v) FBS (Sigma) and 1% Antibiotic-Antimycotic (Gibco). All cell lines were tested for Mycoplasma using the MycoAlert™ PLUS Detection Kit (Lonza) and STR validated (CWRU Genomics Core) prior to experimental testing and following each genetic modification.
Generation and selection of stable cell lines overexpressing SLX4IP and SLX4IP truncation constructs utilized an identical strategy as described previously.35 (link) To generate the 3XFLAG-tagged SLX4IP truncation constructs depicted in Figure 1a, full-length 3XFLAG-tagged SLX4IP was sub-cloned by TOP Gene Technologies, Inc. Generation and selection of stable cell lines with SLX4IP knockdown utilized an identical strategy as described previously.35 (link)
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8

Testosterone Propionate Procurement and Cell Culture

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Testosterone propionate (TP) was procured from the Tokyo Chemical Industry Co. (Tokyo, Japan). Protease inhibitor cocktail, finasteride (Fi) (≥97% pure), and dihydrotestosterone (≥99% pure) were purchased from Sigma-Aldrich Inc. (St. Louis, MO, USA). Roswell Park Memorial Institute (RPMI) medium, fetal bovine serum (FBS), and penicillin/streptomycin were purchased from Gibco (Big Cabin, OK, USA).
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9

Prostate Organoid Culture Protocol

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The organoid culture was performed as described previously (Karthaus et al., 2014 (link)). Briefly, dissociated prostate cells from 8-12 week-old C57B1/6 mice were cultured in DMEM/F12 supplemented with B27 (Life technologies, Grand Island, NY), 10 mM HEPES, Glutamax (Life technologies, Grand Island, NY), Penicillin/Streptomycin, and the following growth factors: EGF 50 ng/ml (Peprotech, Rocky Hill, NJ), 500 ng/ml recombinant R-spondin1 (Peprotech, Rocky Hill, NJ), 100 ng/ml recombinant Noggin (Peprotech, Rocky Hill, NJ), 200 μM TGF-β/Alk inhibitor A83-01 (Tocris, Ellisville, MO), and 10 μM Y-27632 (Tocris, Ellisville, MO). Dihydrotestosterone (Sigma, St. Louis, MO) was added at 1 nM final concentration. Cells were resuspended in growth factor reduced matrigel (Corning, Corning, NY) and plated in 96-well plates.
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10

Enzalutamide, DHT, and JQ-1 Protocol

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Enzalutamide was obtained from MedchemExpress (HY-70002). Dihydrotestosterone (DHT) was obtained from Sigma (A8380). For in vitro experiments, JQ-1 was obtained from BPS Bioscience (27402). For in vivo studies, JQ-1 was obtained from the laboratory of Dr. James Bradner, Dana Farber Cancer Institute Dept. of Medical Oncology/Harvard Medical School Dept. of Medicine. For in vitro studies, DMSO stocks of Enzalutamide and JQ-1 and ethanol stocks of DHT were diluted to desired working concentrations in cell culture media (RPMI with 10% charcoal-stripped fetal bovine serum unless otherwise noted) with a final vehicle concentration of 0.1%. Vehicle-only controls were used in all cases, and vehicle concentrations were normalized across all drug co-treatments. See below for information on administration of drugs for in vivo studies.
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