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4 protocols using pd325901

1

Cell Lines and Inhibitors for Melanoma Research

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The HEK293, Malme-3M, Malme-3 and A375 cell lines were obtained from American Type Culture Collection, and SK-Mel-19 was kindly provided by Dr. Neal Rosen (Memorial Sloan-Kettering Cancer Center). The cancer cell lines derived from melanoma (SK-Mel-19, A375 and Malme-3M) were maintained in RPMI-1640 medium (Gibco) supplemented with 10% heat-inactivated fetal bovine serum (Biological Industries), 50 U/ml penicillin, and 50 μg/ml streptomycin at 37°C with 5% CO2. The Malme-3 cells, which were derived from skin fibroblasts, were grown in McCoy's 5a Medium (Gibco) supplemented with 20% heat-inactivated FBS, 50 U/ml penicillin, and 50 μg/ml streptomycin at 37°C with 5% CO2. The human embryonic kidney cell line HEK293 was maintained in Dulbecco's modified Eagle's medium (Gibco) supplemented with 5% heat-inactivated fetal bovine serum, 50 U/ml penicillin, and 50 μg/ml streptomycin at 37°C with 5% CO2. The MEK inhibitors, PD325901, PLX4032 (Selleck) and U0126 (Sigma-Aldrich), and actinomycin D (Enzo) were dissolved in DMSO as stock solutions and stored at −20°C.
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2

Detailed ChIP-PCR, Mutagenesis, and Reporter Assays

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The primers used for ChIP-PCR, mutagenesis, constructing P27p-PGL3 luciferase reporters and CREB genotyping primers were listed in Supplementary Table 1. The CREB gene was cloned into the BglII sites of pRVKM plasmid using primers listed in Supplementary Table 1. The real-time RT-PCR primers used to quantify Il17, Il17f, Il21, RORα, RORγt, IkBζ, Batf, AHR and β-actin, and the Il17p-PGL3, CNS2-Il17p-PGL3 luciferase reporter constructs were described previously (Chang et al., 2011 (link), Yang et al., 2008 (link)). Most of the protein kinase inhibitors were purchased from Selleck Chemicals LLC, including H89 (Cat# S1582) for PKA and MSK1/2, PD325901 (Cat#S1036) for ERK, SB203580 (Cat#S1076) for p38, sotrastaurin (Cat#S2791) for PKC-ϴ and KN-93 (Cat#S7423) for CamKIV. The PI3K inhibitor LY294002 (Cat#L9908) was purchased from Sigma. The CREB and p27 antibodies were purchased from Cell Signaling: CREB (Cat#9197, Clone#48H2) & phospho-CREB (Cat#9198, Clone#87G3) for ChIP assays, phospho-CREB (Cat#9187, Clone#87G3) for flowcytometry assays and p27 antibody (Cat#3688, Clone#D37H1) for western blotting.
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3

Melanoma Cell Line Viability Assay

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A375, MALME-3M, 451Lu, IGR1, CP66, and HMVII melanoma cell lines were maintained
in RPMI medium 1640 (Gibco, Life Technologies) and WM3060 cells in Leibovitz's L-15 medium
(Gibco, Life Technologies) in 10% heat-inactivated fetal bovine serum (FBS) (Gibco, Life
Technologies) at 37°C in a humidified 5% CO2 incubator. Cell lines were
authenticated by STR DNA fingerprinting (32 (link)) (STR
profiles available in Supplementary
Table 4
). Stably expressing DOX-inducible shRNA cells were cultured in Tet System
Approved FBS (Clontech). DOX treated cells were cultured in media at a concentration of
0.4 μg/mL. CellTiter-Glo® Luminescent Cell Viability Assays (Promega) were
used to measure viability following cell treatment with dabrafenib (GSK21118436),
vemurafenib (PLX4032), trametinib (GSK1120212) and MEK inhibitor (PD325901) treatment
(Selleck Chemicals). Briefly, 5000 cells were seeded in 96 well plates in triplicates and
12h later treated with drug with indicated concentrations for 72–96h. % Cell
viability calculated by comparison to DMSO no treatment control. Analysis and IC50s
calculated by GraphPad Prism 6 software.
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4

Therapeutic Screening of Cancer Drugs

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Erlotinib and dasatinib were from LC laboratories. Docetaxel and doxorubicin were from Sigma. PD325901 and BEZ235, were from Selleck Chemicals. GDC-0941 was synthesized at Genentech. Gemcitabine was from Toronto Research. TGF-β1 was from R&D Systems Inc. Additional drugs used in the screen are described in Table S3.
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