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Evi1 governs Kdm6b-mediated histone demethylation to finely regulate the Laptm4b-driven mTORC pathway in vivo [LSK]

ABSTRACT: Ecotropic viral integration site 1 (EVI1/MECOM) overexpression is common in myeloid malignancies. We present a new Evi1 transgenic mouse model with inducible expression in hematopoietic stem cells (HSCs) and progenitor cells (HPCs) at lower levels. Upon exogenous Evi1 induction, mice displayed anemia, thrombocytopenia, lymphopenia, and dysplasia in erythroid and megakaryocyte cells with a significant expansion of committed myeloid progenitor cells, resembling human Myelodysplastic syndrome/Myeloproliferative neoplasm (MDS/MPN)-like disease. Methods: LSK cells were sorted by Sony SH800 from 3 pairs of mice transplanted with WT BM cells and Evi1-OE BM cells after pIpC injection. Around 5X103 LSK cells were harvested from each mouse. Then the cells were lysated by Trizol and total RNA was extracted by phenol-chloroform. Results: Molecular pathways altered in LSK cells from recipient mice transplanted with Evi1-OE BM cells. Conclusions: Transcription profile changed in Evi1 overexpressing hematopoietic stem and progenitor cells.

ORGANISM(S): Mus musculus

PROVIDER: GSE235441 | GEO | 2023/06/27

REPOSITORIES: GEO

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Evi1 governs Kdm6b-mediated histone demethylation to finely regulate the Laptm4b-driven mTORC pathway in vivo [LK]

Project description:Ecotropic viral integration site 1 (EVI1/MECOM) overexpression is common in myeloid malignancies. We present a new Evi1 transgenic mouse model with inducible expression in hematopoietic stem cells (HSCs) and progenitor cells (HPCs) at lower levels. Upon exogenous Evi1 induction, mice displayed anemia, thrombocytopenia, lymphopenia, and dysplasia in erythroid and megakaryocyte cells with a significant expansion of committed myeloid progenitor cells, resembling human Myelodysplastic syndrome/Myeloproliferative neoplasm (MDS/MPN)-like disease. Methods: Lin-C-Kit+ cells were isolated from 3 pairs of WT and Evi1 overexpressing mice. Around 1X106 Lin-C-Kit+ cells were harvested from each mouse. Then the cells were lysated by Trizol and total RNA was extracted by phenol-chloroform. Results: Molecular pathways altered in Lin-C-Kit+ cells from Evi1-OE mice. Conclusions: Multiple molecular pathways changed in Evi1 overexpressing hematopoietic stem and progenitor cells.

2023-06-27 | GSE235440 | GEO

Evi1 governs Kdm6b-mediated histone demethylation to finely regulate the Laptm4b-driven mTORC pathway in vivo [CUT&RUN]

Project description:Ecotropic viral integration site 1 (EVI1/MECOM) overexpression is common in myeloid malignancies. We present a new Evi1 transgenic mouse model with inducible expression in hematopoietic stem cells (HSCs) and progenitor cells (HPCs) at lower levels. Upon exogenous Evi1 induction, mice displayed anemia, thrombocytopenia, lymphopenia, and dysplasia in erythroid and megakaryocyte cells with a significant expansion of committed myeloid progenitor cells, resembling human Myelodysplastic syndrome/Myeloproliferative neoplasm (MDS/MPN)-like disease. Methods: Lin-C-Kit+ cells were isolated from 2 Evi1 overexpressing mice for CUT&RUN assay using flag antibody and IgG. Lin-C-Kit+ cells were isolated from 2 pair of WT mice and Evi1 overexpressing mice for CUT&RUN assay using H3K27me3 antibody.Around 5X105 Lin-C-Kit+ cells for each group were used in CUT&RUN assay. About 10 ng of the purified CUT&RUN DNA was used for preparation of multiplexed libraries with the NEB Ultra II DNA Library Prep Kit per manufacturer's instruction (NEB #E7103). Sequencing was conducted using an Illumina NextSeq 500 Sequencing System. Results: Molecular pathways altered in Lin-C-Kit+ cells from Evi1-OE mice. Conclusions: Evi1 has a special binding profiling in Lin-C-Kit+ cells. The modification profile of H3K27me3 was altered in Evi1-OE hematopoietic stem and progenitor cells.

2023-06-27 | GSE235439 | GEO

Evi1 governs Kdm6b-mediated histone demethylation to finely regulate the Laptm4b-driven mTORC pathway in vivo [LSK]

Project description:Evi1 governs Kdm6b-mediated histone demethylation to finely regulate the Laptm4b-driven mTORC pathway in vivo [LSK]

| PRJNA986077 | ENA

Evi1 governs Kdm6b-mediated histone demethylation to finely regulate the Laptm4b-driven mTORC pathway in vivo

Project description:This SuperSeries is composed of the SubSeries listed below.

2023-06-27 | GSE235442 | GEO

Evi1 governs Kdm6b-mediated histone demethylation to finely regulate the Laptm4b-driven mTORC pathway in vivo

Project description:Evi1 governs Kdm6b-mediated histone demethylation to finely regulate the Laptm4b-driven mTORC pathway in vivo

| PRJNA986072 | ENA

Evi1 governs Kdm6b-mediated histone demethylation to finely regulate the Laptm4b-driven mTORC pathway in vivo [LK]

Project description:Evi1 governs Kdm6b-mediated histone demethylation to finely regulate the Laptm4b-driven mTORC pathway in vivo [LK]

| PRJNA986078 | ENA

Evi1 governs Kdm6b-mediated histone demethylation to finely regulate the Laptm4b-driven mTORC pathway in vivo [CUT&RUN]

Project description:Evi1 governs Kdm6b-mediated histone demethylation to finely regulate the Laptm4b-driven mTORC pathway in vivo [CUT&RUN]

| PRJNA986076 | ENA

BCR-ABL enhances differentiation of long-term repopulating hematopoietic stem cells

Project description:The biology of chronic myeloid leukemia (CML)-stem cells is still incompletely understood. Therefore, we previously developed an inducible transgenic mouse model in which stem cell targeted induction of BCR-ABL expression leads to chronic phase CML-like disease. Here, we now demonstrate that the disease is transplantable using BCR-ABL positive LSK cells (lin-Sca-1+c-kit+). Interestingly, the phenotype is enhanced when unfractionated bone marrow (BM) cells are transplanted. However, neither progenitor cells (lin-Sca-1-c-kit+) nor mature granulocytes (CD11b+Gr-1+), or potential stem cell niche cells were able to transmit the disease or alter the phenotype. The phenotype was largely independent of BCR ABL priming prior to transplant. However, BCR-ABL abrogated the potential of LSK cells to induce full blown disease in secondary recipients. Subsequently, we found that BCR-ABL increased the fraction of multipotent progenitor cells (MPP) at the expense of long term HSC (LT-HSC) in the BM. Microarray analyses of LSK cells revealed that BCR-ABL alters the expression of genes involved in proliferation, survival, and hematopoietic development. Our results suggest that BCR-ABL induces differentiation of LT-HSC and decreases their self renewal capacity. Furthermore, reversion of BCR-ABL eradicates mature cells while leukemic stem cells persist, giving rise to relapsed CML upon re-induction of BCR-ABL.

2010-01-01 | GSE18446 | GEO

In vivo haematopoietic cell production by bone marrow-derived hemogenic endothelium

Project description:By tracing the VE-cadherin expression in the newborn bone marrow hematopoietic LSK (lineage minus/Sca-positive/Kit-positive) cells, we demonstrated that the late foetal/newborn BM hemogenic endothelial cells produce a small cohort of hematopoietic stem and progenitor cells (HSPCs) capable of circulating and colonizing the secondary haematopoietic organs. Phenotypic and functional analyses disclosed that BM endothelium-derived HSPCs are mainly Multipotent Progenitors (MPPs) and a few Hematopoietic Stem Cells. We used microarrays to detail the global programme of gene expression underlying the endothelial origin of LSK cells in the newborn bone marrow.

2018-11-24 | GSE122857 | GEO

RNA-sequencing of stably engrafted miR-99 KD LSKs

Project description:We FACS-purified GFP+ LSK cells from mice transplanted with stably engrafted miR-99 KD and Scr HSCs and performed RNA-sequencing, demonstrating miR-99 KD results in significant depletion of hematopoietic stem cell gene expression signature and induces a differentiated progenitor gene expression signature.

2017-07-27 | GSE101903 | GEO

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