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A cutting-edge approach unravels a novel role for CDK6 in leukemic progenitor cells

ABSTRACT: A cutting-edge approach unravels a novel role for CDK6 in leukemic progenitor cells

PROVIDER: PRJNA646386 | ENA |

REPOSITORIES: ENA

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A cutting-edge approach unravels a novel role for CDK6 in leukemic progenitor cells

Project description:CDK6 induces a complex transcriptional program to block p53 in hematopoietic cells. CDK6 binds to the promoters of genes including p53-antagonists. Cells lacking CDK6 kinase function are required to mutate p53 to achieve a fully transformed immortalized state.

2021-01-22 | GSE154464 | GEO

CDK6 as key regulator of hematopoietic and leukemic stem cell activation.

Project description:The cyclin-dependent kinases (CDK) CDK6 and CDK4 have redundant functions in regulating cell-cycle progression. We describe a novel role for CDK6 in hematopoietic and leukemic stem cells (HSCs and LSCs) that exceeds its function as cell-cycle regulator. Although hematopoiesis appears regular under steady state conditions Cdk6-/- HSCs do not efficiently repopulate upon competitive transplantation and Cdk6-deficient mice are significantly more susceptible to 5-fluorouracil (5-FU) treatment. We find that activation of HSCs requires CDK6, which interferes with transcription of key regulators including Egr1. The central role of Egr1 is supported by transcriptional profiling of HSCs. The impaired repopulation capacity extends to BCR-ABLp210+ leukemic stem cells. Transplantation with BCR-ABLp210+-infected bone marrow (BM) from Cdk6-/- mice fails to induce disease although recipient mice do harbor LSCs. Egr1 knock-down in cdk6-/- BCR-ABLp210+ LSKs significantly enhances colony formation underlining the importance of the Cdk6-Egr1 axis. Our findings define CDK6 as an important regulator of stem cell activation and as essential component of a transcriptional complex that suppresses Egr1 in HSCs and LSCs. Four-condition experiment, Untreated or polyI:C-treated CDK6-/- cells versus untreated or polyI:C-treated wild-type cells. Biological replicates: 3 untreated replicates, 3 polyI:C-treated replicates.

2015-02-20 | E-GEOD-62012 | biostudies-arrayexpress

CDK6 as key regulator of hematopoietic and leukemic stem cell activation.

2015-02-20 | GSE62012 | GEO

ChIP sequencing experiment of HA-tagged WT CDK6 or of a C-terminally truncated variant of CDK6 (CDK6 delta-C) in BCR-ABL1 expressing cell lines

Project description:The cell cycle kinase CDK6 interacts with a variety of proteins including cyclins and members of the INK4 and Cip/Kip families. These interactions are thought to involve primarily the N-lobe of the protein. Less is known about the role of the C-lobe for the function of CDK6. In this experiment we assessed the function of the C-lobe in CDK6's interaction with transcriptional complexes. We generated cell lines by retroviral over-expression of BCR-ABL1 in bone marrow cells from CDK6 knock-out mice. We then introduced HA-tagged variants of CDK6 - either wildtype CDK6 (CDK6_WT) or a C-terminally truncated variant of CDK6 lacking the last 32 amino acids of the protein (CDK6_delta-C). ChIP was performed with an antibody against the HA tag. CDK6 KO cell lines were used as controls.

2024-06-30 | E-MTAB-13798 | biostudies-arrayexpress

RNA-seq data from VavCre;Jak2+/+; Cdk6+/+, VavCre;Jak2V617F; Cdk6+/+, VavCre;Jak2V617F; Cdk6-/-, VavCre; Jak2+/+; Cdk6-/- murine bone marrow LSK cells and VavCre; Jak2V617F; Cdk6+/+ Palbociclib treated murine bone marrow LSK cells

Project description:We describe a critical role for Cdk6 in JAK2V617F+ MPN evolution. The absence of Cdk6 ameliorates clinical symptoms and prolongs survival of JAK2V617F fl/+ vav-Cre mice. The Cdk6 protein interferes with three hallmarks of disease: besides regulating malignant stem cell quiescence, it promotes NFkB signaling and contributes to cytokine production while inhibiting apoptosis. The treatment with palbociclib did not mirror these effects, showing that the functions of Cdk6 in MPN pathogenesis are largely kinase-independent.

2019-06-10 | GSE123401 | GEO

Gene expression profiling of murine BCR-ABL+ CDK6-wt and CDK6-KO cells

Project description:Dertermination of chromatin accessibility in murine BCR-ABL+ CDK6-wt and CDK6-KO cells

2020-11-24 | GSE156966 | GEO

CDK6 antagonizes p53-induced responses during tumorigenesis

2018-08-06 | GSE113752 | GEO

Crosstalk with astrocytes establishes tumor edge in glioblastoma

Project description:Clinical outcomes for patients with glioblastoma (GBM) are extremely poor due to inevitable tumor recurrence even after extensive treatments. These recurrences are thought to manifest from cells located within the tumor edge. Despite this, the precise molecular mechanism governing GBM spatial phenotypic heterogeneity (e.g. edge vs. core) and subsequent tumor recurrence remains poorly elucidated. Here, using patient-derived GBM core and edge tissues, we analyzed transcriptional and metabolic signatures in an effort to determine how GBM facilitates the edge phenotype and its associated recurrence-initiating cells (RICs). In so doing, we unexpectedly identified CD38 as an essential protein in the formation of the edge phenotype and found a CD38-driven interaction between edge GBM cells and neighboring astrocytes that communally develops a GBM edge that is unresectable by surgery and retains RICs.

2021-12-25 | GSE135408 | GEO

ChIP seq of CDK6-WT and CDK6-K43M in murine BCR-ABL(p185)+ pre/pro B-cells

Project description:The aim of this experiment was to study the DNA interaction of a kinase-dead mutant of the cell cycle kinase CDK6 (CDK6-K43M) in a murine model of BCR-ABL driven leukemia.

2024-06-30 | GSE264219 | GEO

Single cell RNA Seq to study the effects of kinase-inactivated Cdk6 or a Cdk6 knock-out in the mouse LSK cell compartment

Project description:To understand kinase-dependent and kinase-independent functions of Cdk6 in the hematopoietic stem and progenitor compartment, mouse models carrying wild-type Cdk6 (Cdk6_WT), a homozygous knock-in of a kinase-inactivated variant of Cdk6 (Cdk6_K43M) or a homozygous Cdk6 knock-out (Cdk6_KO) were used. From these mice, lineage-negative, Sca1-positive, c-Kit-positive cells (LSK cells) were isolated by means of flow cytometry cell sorting. 30000 LSK cells per mouse were subjected to library prep for single cell RNA Sequencing using the Chromium NextGem Single Cell 5’ v2 Kit (10x Genomics, Pleasanton, CA, USA)

2024-05-22 | E-MTAB-13149 | biostudies-arrayexpress

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