To identify genes responsive to treatment with the HIF2a inhibitor PT2399
Ontology highlight
ABSTRACT: HIF2a function is both necessary and sufficient for the growth of VHL-null clear cell Renal Cell Carcinoma (ccRCC). Targeting HIF2a function can therefore be a promising therapeutic strategy. We used microarray analysis to characterize a novel pharmacological inhibitor of HIF2a named PT2399. By comparing genes that are responsive to PT2399 in parental cells vs cells lacking HIF2a, by virtue of CRISPR-mediated genetic editing, we characterized gene signatures that are regulated by PT2399 in a HIF2a dependent manner. Cells were treated with either DMSO (control) or 2uM PT2399 for indicated time periods, total RNA was extracted and analyzed. Please note that the experiments with 786O Parental and HIF2a null cells were conducted independently.
Project description:HIF2a function is both necessary and sufficient for the growth of VHL-null clear cell Renal Cell Carcinoma (ccRCC). Targeting HIF2a function can therefore be a promising therapeutic strategy. We used microarray analysis to characterize a novel pharmacological inhibitor of HIF2a named PT2399. By comparing genes that are responsive to PT2399 in parental cells vs cells lacking HIF2a, by virtue of CRISPR-mediated genetic editing, we characterized gene signatures that are regulated by PT2399 in a HIF2a dependent manner.
Project description:Gene expression profiling was performed in ccRCC cells, which either express both HIF1alpha and HIF2alpha (either naturally or by virtue of induced expression of HIF1alpha) or express HIF2alpha alone (either naturally or by virtue of a HIF1alpha shRNA), to identify genes regulated by HIF1alpha in ccRCC cells. Three H2 cell lines 769P, A498, and SLR24 were stably infected with retrovirus encoding doxycycline-inducible Luciferase (control) or HIF1alpha, and two H1H2 cell lines Caki-2 and SLR25 were stably infected with retroviruses encoding scrambled (control) or HIF1alpha shRNA. Duplicated samples were used for each condition.
Project description:Gain-of-function mutations in NOTCH1 are common in T-cell lymphoblastic leukemias making this receptor a promising target for drugs such as gamma-secretase inhibitors (GSI), which block a proteolytic cleavage required for NOTCH1 activation. However, the enthusiasm for these therapies has been tempered by tumor resistance and the paucity of information on the oncogenic programs regulated by oncogenic NOTCH1. Analysis of gene expression in GSI-responsive and GSI-resistant cell lines treated with Compound E identifies differential resopnses to GSI. Keywords: Drug response Samples for microarray analysis were prepared and hybridized in Affymetrix Human U133 Plus 2.0 arrays according to the manufacturerâs instructions and as previously described. RNA was extracted from duplicate cultures of GSI-sensitive (ALL-SIL, CUTLL1, DND41, HPB-ALL, KOPTK1) and GSI-resistant (CCRF-CEM, MOLT3, P12 ICHIKAWA, PF382 and RPMI8402) T-ALL cell lines treated for 24 h with vehicle (DMSO) or 500 nM CompE. Interarray intensity differences were normalized with Dchip.
Project description:During mammalian kidney development, mesenchymal nephron progenitors (cap mesenchyme) differentiate into the epithelial cells that go on to form the nephron. Although differentiation of nephron progenitors is triggered by activation of Wnt/b-catenin signaling, constitutive activation of Wnt/b-catenin signaling blocks epithelialization of nephron progenitors. Full epithelialization of nephron progenitors requires transient activation of Wnt/b-catenin signaling. We performed transcriptional profiling of nephron progenitors responding to constitutive or transient activation of Wnt/b-catenin signaling. Nephron progenitors were FACS-isolated from BAC transgenic Six2GFPcre-positive embryonic kidneys at E16.5. Cells were aggregated by centrifugation at 850g for 5min and incubated in 10%FBS/DMEM containing either 4uM BIO or the equal volume of DMSO for 24hrs or 48hrs.
Project description:Analysis of five Notch signaling-dependent human T-ALL cell lines (ALLSIL, DND41, HPBALL, KOPTK1, TALL-1) treated with gamma-secretase inhibitor (GSI) to block Notch signaling. Samples include parental cells, cells rescued by retroviral transduction with ICN (a GSI-independent form of activated Notch1), and cells retrovirally transduced with c-Myc (an important downstream target of Notch1). Results allow segregation of bona fide Notch targets from other genes affected by gamma-secretase inhibition as well as from targets downstream of c-Myc. Thirty samples were analyzed. Five human T-ALL cell lines (ALLSIL, DND41, HPBALL, KOPTK1, TALL-1) were treated with gamma-secretase inhibitor (1.0 micromolar compound E) vs. DMSO vehicle control for 12 hours. Each cell line was also retrovirally transduced with ICN or c-Myc, FACS sorted, and then treated with GSI vs. DMSO.
Project description:HIF2A(EPAS1) geenome_wide localization by Cut & Tag in MRC5 human fibroblasts ectopically expressing HIF2A in the pBabe vector, and in control MRC5 human fibroblasts containing only the pBabe vector. 2 biological replicates were done for the MRC5-HIF2A cells. Cut & Tag with an anti-H3-K27me3 Ab was done as a positive control for the Cut & Tag experiments.
Project description:We reasoned that the pi-RISC, by virtue of the enormous sequence portfolio of piRNAs, might mediate elimination of a large variety of mRNAs in late stages of spermiogenesis. Both Miwi-null and Caf1-null mice showed early spermiogenic arrest, preventing us from determining the role of MIWI and CAF1 in elongating spermatids using the existing genetic models. We therefore used microarrays to detail the global effect of MIWI or CAF1 on mRNA levels in mouse elongating spermatids.
Project description:Acquired drug resistance prevents targeted cancer therapy from achieving stable and complete responses. Emerging evidence implicates a key role for nonmutational mechanisms including changes in cell state during early stages of acquired drug resistance. Targeting nonmutational resistance may therefore present a therapeutic opportunity to eliminate residual surviving tumor cells and impede relapse. A variety of cancer cell lines harbor quiescent, reversibly drug-tolerant âpersisterâ cells which survive cytotoxic drugs including targeted therapies and chemotherapies. These persister cells survive drug through nonmutational mechanisms which are poorly understood. Specifically targeting persister cells is a promising strategy to prevent tumor relapse. We sought to identify therapeutically exploitable vulnerabilities in persister cells using the HER2-amplified breast cancer line BT474 as an experimental model. Similar to other persister cell models, upon treatment with the HER2 inhibitor lapatinib (2uM concentration) for nine or more days, the majority of BT474 cells die, revealing a small population of quiescent surviving persister cells. Removal of lapatinib allows the persister cells to regrow and to re-acquire sensitivity to lapatinib. Subsequent lapatinib treatment re-derives persister cells. The reversibility of persister cell drug resistance indicates a nonmutational resistance mechanism. Here we provide RNAseq gene expression profiling data generated from parental BT474 cells compared to BT474 persister cells generated from nine days of treatment with 2 uM lapatinib. These data can be used to identify genes and pathways which are upregulated in persister cells, revealing potential therapeutic targets. 3 biological replicates of BT474 persister cells, two biological replicates of BT474 parental cells