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SCOPE 4 proteomics - Dual targeting of p53 and c-MYC selectively eliminates leukaemic stem cells

ABSTRACT: BaF3 were transfected with Jak2 V617F, Jak2 K539L or Mpl W515L, shotgun proteomic analysis with iTRAQ was performed

OTHER RELATED OMICS DATASETS IN: PRJNA112367PRJNA132313PRJNA208363PRJNA96045

INSTRUMENT(S): QSTAR

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): B Cell, Blood

DISEASE(S): Acute Leukemia

SUBMITTER: Andrew Williamson

LAB HEAD: Prof. Tony Whetton

PROVIDER: PXD002782 | Pride | 2016-05-26

REPOSITORIES: Pride

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Dataset's files

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			Action	DRS
	012111_AP_Scope4.4_Cyto_17.mzML	Mzml
	012111_AP_Scope4.4_Cyto_17.wiff	Wiff
	012111_AP_Scope4.4_Cyto_17.wiff.scan	Wiff
	012111_AP_Scope4.4_Cyto_18.mzML	Mzml
	012111_AP_Scope4.4_Cyto_18.wiff	Wiff

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Publications

Dual targeting of p53 and c-MYC selectively eliminates leukaemic stem cells.

Abraham Sheela A SA Hopcroft Lisa E M LE Carrick Emma E Drotar Mark E ME Dunn Karen K Williamson Andrew J K AJ Korfi Koorosh K Baquero Pablo P Park Laura E LE Scott Mary T MT Pellicano Francesca F Pierce Andrew A Copland Mhairi M Nourse Craig C Grimmond Sean M SM Vetrie David D Whetton Anthony D AD Holyoake Tessa L TL

Nature 20160608 7607

Chronic myeloid leukaemia (CML) arises after transformation of a haemopoietic stem cell (HSC) by the protein-tyrosine kinase BCR-ABL. Direct inhibition of BCR-ABL kinase has revolutionized disease management, but fails to eradicate leukaemic stem cells (LSCs), which maintain CML. LSCs are independent of BCR-ABL for survival, providing a rationale for identifying and targeting kinase-independent pathways. Here we show--using proteomics, transcriptomics and network analyses--that in human LSCs, ab ...[more]

PMID: 27281222

Similar Datasets

Dual targeting of p53 and c-MYC selectively eliminates leukaemic stem cells.

Project description:Chronic myeloid leukaemia (CML) arises after transformation of a haemopoietic stem cell (HSC) by the protein-tyrosine kinase BCR-ABL. Direct inhibition of BCR-ABL kinase has revolutionized disease management, but fails to eradicate leukaemic stem cells (LSCs), which maintain CML. LSCs are independent of BCR-ABL for survival, providing a rationale for identifying and targeting kinase-independent pathways. Here we show--using proteomics, transcriptomics and network analyses--that in human LSCs, aberrantly expressed proteins, in both imatinib-responder and non-responder patients, are modulated in concert with p53 (also known as TP53) and c-MYC regulation. Perturbation of both p53 and c-MYC, and not BCR-ABL itself, leads to synergistic cell kill, differentiation, and near elimination of transplantable human LSCs in mice, while sparing normal HSCs. This unbiased systems approach targeting connected nodes exemplifies a novel precision medicine strategy providing evidence that LSCs can be eradicated.

| S-EPMC4913876 | biostudies-literature

Analysis of mouse T cell transcription profile after co-culture with BaF3 cells with or without the oncogenic point mutation JAK2 V617F

Project description:The activation of PD-1 (Programmed Death receptor-1) on T cells can cause T cell exhaustion and immune tolerance. Some tumors up-regulate the expression of the ligand of PD-1, namely PD-L1 (Programmed Death Receptor-Ligand 1), thus preventing anti-tumor immune response and promoting immune-escape. Previous studies have shown that JAK2 (Janus Kinase 2) signaling can promote PD-L1 expression in Hodgkin Lymphoma. In Myeloproliferative Neoplasms (MPN), JAK2 is frequently characterized by the the presence of the point-mutation V617F, which leads to its constitutive activation and to uncontrolled cell proliferation and survival. Accordingly, tumor cell lines expressing JAK2 V617F express higher levels of PD-L1 as compared to tumor cell lines negative for such mutations. In this experiment, we transfected BaF3 cells with a vector (plasmid for Murine Stem Cell Virus) containing the gene for JAK2 with the point-mutation V617F. As control, we used BaF3 cells transfected with the same vector, but without the gene for JAK2 V617F (empty vector). Both the cell lines (with/without JAK2 V617F) were co-cultured with primary murine T cells. When co-cultured with BaF3 cells expressing JAK2 V617F, T cells upregulated genes connected to senescence pathways, showed increased apoptosis, less cytokine production, and displayed other forms of dysfunction which can be associated with the activation of PD-1.

2018-12-01 | E-MTAB-5028 | biostudies-arrayexpress

CML proteome analysis, QSTAR - Dual targeting of p53 and c-MYC selectively eliminates leukaemic stem cells

Project description:Using mass spectrometry the proteomesof CML were compared to normal tissue.

2016-06-03 | PXD001503 | Pride

Mus musculus

Project description:JAK2 Naive and Persitent Murine BaF3 cells infected with MPLW515L

| PRJNA167738 | ENA

A cell competition-based drug screen identifies a novel compound that induces dual c-Myc degradation and p53 activation

Project description:BCR-Abl is a driver oncogene that causes chronic myeloid leukemia and a subset of acute lymphoid leukemias. Although tyrosine kinase inhibitors provide an effective treatment for these diseases, they generally do not kill leukemic stem cells. Leukemic stem cells are cancer-initiating cells that compete with normal hematopoietic stem cells for the bone marrow niche. Using BCR-Abl as a model oncogene, we performed a drug screen based on competition between isogenic untransformed cells and BCR-Abl-transformed cells, and identified several compounds that selectively target BCR-Abl-transformed cells. Systems-level analysis of one of these novel compounds, DJ34, revealed that it induced depletion of c-Myc and activation of p53. c-Myc depletion occurred in a wide range of tumor types, including leukemia, lymphoma, lung, glioblastoma and breast cancer. Further analyses revealed that DJ34 interferes with c-Myc synthesis at the level of transcription, and we provide data showing that DJ34 is a DNA intercalator and topoisomerase II inhibitor. Physiologically, DJ34 induced apoptosis, cell cycle arrest and cell differentiation, and primary leukemic stem cells were particularly sensitive to DJ34. Taken together, we have identified a novel compound that dually targets c-Myc and p53 in a wide variety of cancers, and with particularly strong activity against leukemic stem cells.

2020-12-07 | PXD018812 | Pride

Targeting of SMARCA4 bromodomain selectively inhibits leukemic cell proliferation

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2015-07-12 | E-GEOD-67924 | biostudies-arrayexpress

Piperlongumine and p53-reactivator APR-246 selectively induce cell death in HNSCC by targeting GSTP1.

Project description:TP53 mutations frequently occur in head and neck squamous cell carcinoma (HNSCC) patients without human papillomavirus infection. The recurrence rate for these patients is distinctly high. It has been actively explored to identify agents that target TP53 mutations and restore wild-type (WT) TP53 activities in HNSCC. PRIMA-1 (p53-reactivation and induction of massive apoptosis-1) and its methylated analogue PRIMA-1Met (also called APR-246) were found to be able to reestablish the DNA-binding activity of p53 mutants and reinstate the functions of WT p53. Herein we report that piperlongumine (PL), an alkaloid isolated from Piper longum L., synergizes with APR-246 to selectively induce apoptosis and autophagic cell death in HNSCC cells, whereas primary and immortalized mouse embryonic fibroblasts and spontaneously immortalized non-tumorigenic human skin keratinocytes (HaCat) are spared from the damage by the co-treatment. Interestingly, PL-sensitized HNSCC cells to APR-246 are TP53 mutation-independent. Instead, we demonstrated that glutathione S-transferase pi 1 (GSTP1), a GST family member that catalyzes the conjugation of GSH with electrophilic compounds to fulfill its detoxification function, is highly expressed in HNSCC tissues. Administration of PL and APR-246 significantly suppresses GSTP1 activity, resulting in the accumulation of ROS, depletion of GSH, elevation of GSSG, and DNA damage. Ectopic expression of GSTP1 or pre-treatment with antioxidant N-acetyl-L-cysteine (NAC) abrogates the ROS elevation and decreases DNA damage, apoptosis, and autophagic cell death prompted by PL/APR-246. In addition, administration of PL and APR-246 impedes UMSCC10A xenograft tumor growth in SCID mice. Taken together, our data suggest that HNSCC cells are selectively sensitive to the combination of PL and APR-246 due to a remarkably synergistic effect of the co-treatment in the induction of ROS by suppression of GSTP1.

| S-EPMC6014869 | biostudies-literature

Jak2 mediated phosphorylation and activation of TET2 in hematopoiesis

Project description:FDCP cells were stably transfected with JAK2V617F or WT JAK2 vectors and then examined for genome wide methylation with the HELP assay

2020-01-01 | GSE116537 | GEO

Targeting C-myc G-quadruplex: dual recognition by aminosugar-bisbenzimidazoles with varying linker lengths.

Project description:G-quadruplexes are therapeutically important biological targets. In this report, we present biophysical studies of neomycin-Hoechst 33258 conjugates binding to a G-quadruplex derived from the C-myc promoter sequence. Our studies indicate that conjugation of neomycin to a G-quadruplex binder, Hoechst 33258, enhances its binding. The enhancement in G-quadruplex binding of these conjugates varies with the length and composition of the linkers joining the neomycin and Hoechst 33258 units.

| S-EPMC6270413 | biostudies-literature

Dual Targeting Oncoproteins MYC and HIF1α Regresses Tumor Growth of Lung Cancer and Lymphoma.

Project description:MYC and HIF1α are among the most important oncoproteins whose pharmacologic inhibition has been challenging for the diverse mechanisms driving their abnormal expression and because of the challenge in blocking protein-DNA interactions. Surprisingly, we found that MYC and HIF1α proteins in echinomycin-treated cells were degraded through proteasome dependent pathways, respectively by the β-TrCP- or VHL-dependent mechanisms. The degradation is induced in a variety of cancer types, including those with mutations in the p53 tumor and LKB tumor suppressors and the KRAS oncogene. Consistent with inhibition of MYC and HIF1α, administration of echinomycin inhibited growth of lung adenocarcinoma xenograft and a syngeneic lymphoma model in mice. Furthermore, echinomycin efficiently induced regression of syngeneic mouse lymphoma driven by MYC over-expression. Our data demonstrated a new mechanism by which echinomycin simultaneously targets MYC and HIF1α for degradation to inhibit growth of lung cancer and lymphoma. Given the broad impact of β-TrCP or VHL in stability of oncogenic proteins, echinomycin may emerge as a non-PROTAC (proteolysis targeting chimera) degrader of oncogenic proteins.

| S-EPMC7914643 | biostudies-literature

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