Hematopoietic stem and progenitor cell formation in a BCR-ABL inducible expression embryonic stem cell model
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE198018 | GEO | 2023/03/07
REPOSITORIES: GEO
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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
Project description:Chronic myelogenous leukemia (CML) is a malignant disease of the hematopoietic stem cell, characterized by the expression of the Bcr-Abl oncogene by leukemic cells. In order to analyze the molecular pathways modulated by Bcr-Abl, we have previously generated an inducible model of Bcr-Abl expression in the murine Ba/F3 cell line based on the Tet-OFF system. In the present study, through a microarray approach applied to cells grown with (Bcr-Abl-expression OFF) or without (Bcr-Abl-expression ON) doxycycline, a tetracycline analogue, we analyzed the gene expression variations upon Bcr-Abl expression. Keywords: repeat sample
2005-05-01 | GSE1429 | GEO
Project description:Chronic myelogenous leukemia (CML) is a malignant disease of the hematopoietic stem cell, characterized by the expression of the Bcr-Abl oncogene by leukemic cells. In order to analyze the molecular pathways modulated by Bcr-Abl, we have previously generated an inducible model of Bcr-Abl expression in the murine Ba/F3 cell line based on the Tet-OFF system. In the present study, through a microarray approach applied to cells grown with (Bcr-Abl-expression OFF) or without (Bcr-Abl-expression ON) doxycycline, a tetracycline analogue, we analyzed the gene expression variations upon Bcr-Abl expression.
2005-05-01 | E-GEOD-1429 | biostudies-arrayexpress
Project description:BCR-ABL enhances differentiation of long-term repopulating hematopoietic stem cells
| PRJNA118159 | ENA
Project description:The BCR-ABL oncogene, generated by Philadelphia chromosome, is present in about 95% human Chronic myeloid leukemia (CML) and 20~30% acute lymphoblastic leukemia (ALL). One of BCR-ABL isoforms, P210, is more often detected in CML and ALL patients. Although BCR-ABL kinase inhibitors are effective in controlling the diseases, they do not provide cure due to the development of drug resistance and the insensitivity of leukemia stem cells to these drugs. Identification of new therapeutic targets is critical. To identify potential target against leukemia stem cells, we studied gene expression in leukemia stem cells, which were identified in mice in our lab (Hu Y, Swerdlow S, Duffy TM, Weinmann R, Lee FY, Li S. 2006. Targeting multiple kinase pathways in leukemic progenitors and stem cells is essential for improved treatment of Ph+ leukemia. Proc Natl Acad Sci USA 103(45):16870-16875.). The sorted leukemia stem cells that expressed BCR-ABL were used for isolation of RNA, followed by the analysis of gene expression using the DNA microarray. The same lineage of non-BCR-ABL-expressing normal hematopoietic stem cells was used as control. We have identified some interesting genes that are up- or down-regulated by BCR-ABL in these leukemia stem cells. We are currently studying the functions of these identified genes. Experiment Overall Design: Identification of genes that are regulated by BCR/ABL in HSCs. Experiment Overall Design: Bone marrow cells are isolated from the long bones of CML mice that are untreated or treated with imatinib. BCR-ABL-expressing or non-BCR-ABL-expressing (transduced with the empty GFP vector) hematopoietic stem cells (GFP+Lin-c-Kit+Sca-1+) are stored by FACS directly into RNAlater (Ambion, Austin, TX) and are homogenized in RLT Buffer (RNeasy Micro Kit (Qiagen, Valencia, CA)). Total RNA is isolated by following the protocol for the RNeasy Micro Kit, and quality is assessed using a 2100 Bioanalyzer instrument and RNA 6000 Pico LabChip assay (Agilent Technologies, Palo Alto, CA). Utilizing the GeneChip Whole Transcript Sense Target Labeling Assay kit (Affymetrix, Santa Clara, CA.) between 100-300ng of total RNA undergoes reverse transcription with random hexamers tagged with T7 sequence. The double stranded cDNA that is generated is then amplified by T7 RNA polymerase to produce cRNA. Second cycle first strand cDNA synthesis then takes place incorporating dUTP which is later used as sites where fragmentation occurs by utilizing an uracil DNA glycosylase and apurinic/apyrimidinic endonuclease 1 enzyme mix. The fragmented cDNA is then labeled by terminal transferase attaching a biotin molecule using Affymetrix proprietary DNA labeling Reagent. Approximately 2.0µg of fragmented and biotin-labeled cDNA is then hybridized onto a Mouse Gene ST 1.0 Array (Affymetrix, Santa Clara, CA.) for 16 hours at 45°C. Post-hybridization staining and washing are performed according to manufacturer's protocols using the Fluidics Station 450 instrument (Affymetrix). Finally, the arrays are scanned with a GeneChip? Scanner 3000. Images are acquired and cel files generated which are then used for analysis.
2008-04-04 | E-GEOD-10912 | biostudies-arrayexpress
Project description:The BCR-ABL oncogene, generated by Philadelphia chromosome, is present in about 95% human Chronic myeloid leukemia (CML) and 20~30% acute lymphoblastic leukemia (ALL). One of BCR-ABL isoforms, P210, is more often detected in CML and ALL patients. Although BCR-ABL kinase inhibitors are effective in controlling the diseases, they do not provide cure due to the development of drug resistance and the insensitivity of leukemia stem cells to these drugs. Identification of new therapeutic targets is critical. To identify potential target against leukemia stem cells, we studied gene expression in leukemia stem cells, which were identified in mice in our lab (Hu Y, Swerdlow S, Duffy TM, Weinmann R, Lee FY, Li S. 2006. Targeting multiple kinase pathways in leukemic progenitors and stem cells is essential for improved treatment of Ph+ leukemia. Proc Natl Acad Sci USA 103(45):16870-16875.). The sorted leukemia stem cells that expressed BCR-ABL were used for isolation of RNA, followed by the analysis of gene expression using the DNA microarray. The same lineage of non-BCR-ABL-expressing normal hematopoietic stem cells was used as control. We have identified some interesting genes that are up- or down-regulated by BCR-ABL in these leukemia stem cells. We are currently studying the functions of these identified genes. Keywords: Genetic modification
2008-03-22 | GSE10912 | GEO
Project description:Background In the ongoing battle against BCR-ABL+ leukemia, despite significant advances with tyrosine kinase inhibitors (TKIs), the persistent challenges of drug resistance and the enduring presence of leukemic stem cells (LSCs) remain formidable barriers to achieving a cure. Methods In this study, we demonstrated that Disulfiram (DSF) induces ferroptosis to synergize with TKIs in inhibiting BCR-ABL+ cells, particularly targeting resistant cells and LSCs, using cell models, mouse models, and primary cells from patients. We elucidated the mechanism by which DSF promotes GPX4 degradation to induce ferroptosis through immunofluorescence, co-immunoprecipitation (CO-IP), RNA sequencing, lipid peroxidation assays, and rescue experiments. Results Here, we present compelling evidence elucidating the sensitivity of DSF, an FDA-approved drug for alcohol dependence, towards BCR-ABL+ cells. Our findings underscore DSF's ability to selectively induce a potent cytotoxic effect on BCR-ABL+ cell lines and effectively inhibit primary BCR-ABL+ leukemia cells. Crucially, the combined treatment of DSF with TKIs selectively eradicates TKI-insensitive stem cells and resistant cells. Of particular note is DSF's capacity to disrupt GPX4 stability, elevate the labile iron pool, and intensify lipid peroxidation, ultimately leading to ferroptotic cell death. Our investigation shows that BCR-ABL expression induces alterations in cellular iron metabolism and increases GPX4 expression. Additionally, we demonstrate the indispensability of GPX4 for LSC development and the initiation/maintenance of BCR-ABL+ leukemia. Mechanical analysis further elucidates DSF's ability to circumvent resistance by reducing GPX4 levels through the disruption of its binding with HSPA8, thereby promoting GPX4 ubiquitination and subsequent degradation. Furthermore, the combined treatment of DSF with TKIs effectively targets both BCR-ABL+ blast cells and drug-insensitive LSCs, conferring a significant survival advantage in mouse models. Conclusion In summary, the dual inhibition of GPX4 and BCR-ABL presents a promising therapeutic strategy to synergistically target blast cells and drug-insensitive LSCs in patients, offering potential avenues for advancing leukemia treatment.
2024-09-05 | GSE276122 | GEO
Project description:Aberrant long noncoding RNA (lncRNA) expression has been described in many human malignancies, including leukemia. Philadelphia-positive (Ph+) chronic myeloid leukemia (CML) is a stem cell disease induced by Bcr-Abl hybrid gene. Here we attempt to identify lncRNAs associated with CML by analyzing lncRNA expression profiles in K562 cells when Bcr-Abl gene silenced. LncRNA microarray analysis revealed a group of lncRNAs that exhibit Bcr-Abl-dependent expression. In this study, we focused on lncRNA-X that was downregulated by Bcr-Abl, suggesting that lncRNA-X might have a function of tumor suppression. We showed that lncRNA-X over-expression delays Bcr-Abl-induced tumorigenesis in vivo, maybe through its effect on cell survival by modulating STAT5-dependent expression of anti-apoptotic Bcl-XL protein. We also demonstrated that lncRNA-X may affect tumor formation behavior of Bcr-Abl-transformed cells by regulating signaling pathways associated with leukemia stem cells of CML. Together, these results suggest that lncRNA-X suppresses Bcr-Abl-induced tumorigenesis, and the tumor suppressor function of lncRNA-X may be of significance for exploring novel therapeutic strategies for treating CML. This microarray was performed to identify lncRNAs associated with Bcr-Abl-induced chronic myeloid leukemia (CML).
2015-07-20 | GSE42269 | GEO
Project description:Purpose: The goals of this study are to further clarify the regulation mechanism after BCR/ABL expression was induced for three weeks in Scl/tTA-BCR/ABL trangenic mouse hematopoietic stem-progenitor cells. Moreover, integrated analysis of miRNA-mRNA regulatory network was built by combining the transcriptomic data with miRNA microarray data. Methods: Hematopoietic stem-progenitor cells mRNA profiles of BA mice after BCR/ABL expression induced for 0 week and 3 weeks were generated by deep sequencing, using Illumina Hiseq 2500, hematopoietic stem-progenitor cells of 3 mice were mixed in each group. The sequence reads that passed quality filters were analyzed at the transcript isoform level with TopHat followed by edgeR. qRT–PCR validation was performed using SYBR Green assays. Results: Using an optimized data analysis workflow, we investigated the regulation of mRNAs in BM LSKs during murine CML progression, GSEA and GO analysis were taken for the RNA-seq data, revealing that apoptosis pathway was downregulated while cell cycle was upregulated. Then, we comblined RNA-seq data with miRNA microarray data and identified integrated regulatory networks. To validate the analysis results, functional assays were performed with BM LSKs of BA mice and 32D-BCR/ABL cell line. Conclusions: Our study represents mRNA expression profiles bone marrow (BM) LSKs (Lin-Sca-1+C-kit+) at 0 and 3 weeks after doxycyline withdrawal of BA mice, the analysis identified that several pathways including cell cycle, apoptosis, myeloid differentiation and DNA damage were influenced by BCR/ABL expression.
2021-11-01 | GSE122213 | GEO
Project description:Using BCR-ABL-induced chronic myeloid leukemia (CML) as a disease model for leukemia stem cells (LSCs), we showed that BCR-ABL down-regulates the B lymphoid kinase (Blk) gene in leukemia stem cells in CML mice and that Blk functions as a tumor suppressor in LSCs and suppresses LSC function. Inhibition of this Blk pathway accelerates CML development, whereas increased activity of the Blk pathway delays CML development. To identify the pathways in which Blk regulates function of LSCs, we performed a comparative DNA microarray analysis using total RNA isolated from non-BCR-ABL-expressing Lin-Sca-1+c-Kit+, BCR-ABL- and BCR-ABL-Blk expressing LSCs. This analysis revealed a large group of candidate genes that exhibited changes in the levels of transcription in the Blk expressing LSCs, and uncovered the molecular mechanisms by which Blk suppresses LSCs and CML development. Bone marrow cells were transduced with GFP, BCR-ABL-GFP or BCR-ABL-Blk-GFP, followed by transplantation into recipient mice. Fourteen days after transplantation, bone marrow cells were isolated and LSCs were sorted by FACS for isolation of total RNA for DNA microarray analysis.
2012-07-05 | E-GEOD-36096 | biostudies-arrayexpress