Gilteritinib-induced upregulation of S100A9 is mediated through BCL6 in Acute Myeloid Leukemia
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ABSTRACT:
PROVIDER: PRJNA743665 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR15037994.fastq.gz | Fastqsanger.gz | |||
| SRR15037994_1.fastq.gz | Fastqsanger.gz | |||
| SRR15037994_2.fastq.gz | Fastqsanger.gz | |||
| SRR15037995.fastq.gz | Fastqsanger.gz | |||
| SRR15037995_1.fastq.gz | Fastqsanger.gz |
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Project description:Gilteritinib-induced upregulation of S100A9 is mediated through BCL6 in Acute Myeloid Leukemia (RNA-Seq I)
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Project description:Gilteritinib-induced upregulation of S100A9 is mediated through BCL6 in Acute Myeloid Leukemia (RNA-Seq II)
| PRJNA746984 | ENA
Project description:Purpose: Compare transcriptional changes between drug treated (gilteritinib, TP-0903) and vehicle in acute myeloid leukemia xenografts. Methods: FLT3-ITD+ MOLM13-RES-Luc+ (MOLM13 cells with a D835Y mutation generating a resistant phenotype) AML cells were xenografted into NSG mice. Mice were randomized according to bioluminescence imaging, and treatment of FLT3 tyrosine kinase inhibitor (gilteritinib, 30 mg/kg, once daily for 5 days/week) was started on day 13 post-tail vein injection. At study end point, mice were humanely euthanized and bone marrow was collected. AML cells (human CD45+) were isolated, and ATAC-seq was performed on HiSeq 4000, total RNA. Sequencing reads were aligned and analyzed for differential gene expression of treatment vs vehicle cohorts. Results: The analysis revealed the chromatin accessibility changes induced by gilteritinib in MOLM13-RES AML xenograft model.
2021-07-07 | GSE179421 | GEO
Project description:Purpose: Compare transcriptional changes between drug treated (gilteritinib, TP-0903) and vehicle in acute myeloid leukemia xenografts. Methods: FLT3-ITD+ MOLM13-Luc+ AML cells were xenografted into NSG mice. Mice were randomized according to bioluminescence imaging, and treatment of FLT3 tyrosine kinase inhibitors (TP-0903, 60 mg/kg, once daily for 5 days/week; gilteritinib, 30 mg/kg, once daily for 5 days/week) was started on day 7 post-tail vein injection. At study end point, mice were humanely euthanized and bone marrow was collected. AML cells (human CD45+) were isolated, and RNA-seq was performed on total RNA. Sequencing reads were aligned and analyzed for differential gene expression of treatment vs vehicle cohorts. Results: The analysis revealed the transcriptional changes induced by TP-0903 or gilteritinib in MOLM13 AML xenograft model.
2021-07-22 | GSE180181 | GEO
Project description:Purpose: Compare transcriptional changes between drug treated (gilteritinib, TP-0903) and vehicle in acute myeloid leukemia xenografts. Methods: FLT3-ITD+ MOLM13-RES-Luc+ (MOLM13 cells with a D835Y mutation generating a resistant phenotype) AML cells were xenografted into NSG mice. Mice were randomized according to bioluminescence imaging, and treatment of FLT3 tyrosine kinase inhibitors (TP-0903, 60 mg/kg, once daily for 5 days/week; gilteritinib, 30 mg/kg, once daily for 5 days/week) was started on day 13 post-tail vein injection. At study end point, mice were humanely euthanized and bone marrow was collected. AML cells (human CD45+) were isolated, and RNA-seq was performed on total RNA. Sequencing reads were aligned and analyzed for differential gene expression of treatment vs vehicle cohorts. Results: The analysis revealed the transcriptional changes induced by TP-0903 or gilteritinib in MOLM13-RES AML xenograft model.
2021-07-22 | GSE180180 | GEO
Project description:Drug resistance and relapse are common challenges in acute myeloid leukemia (AML), particularly in an aggressive subset bearing internal tandem duplications (ITDs) of the FLT3 receptor (FLT3-ITD+). The tyrosine kinase inhibitor gilteritinib is approved for the treatment of relapse/refractory AML with FLT3 mutations, yet resistance to gilteritinib remains a clinical concern, and the underlying mechanisms remain incompletely understood. Using transcriptomic analyses and functional validation studies, we identified the calcium-binding proteins S100A8 and S100A9 (S100A8/A9) as contributors to gilteritinib resistance in FLT3-ITD+ AML. Exposure of FLT3-ITD+ AML cells to gilteritinib increased S100A8/A9 expression in vivo and in vitro and decreased free calcium levels, and genetic manipulation of S100A9 was associated with altered sensitivity to gilteritinib. Using a transcription factor screen, we identified the transcriptional corepressor BCL6, as a regulator of S100A9 expression and found that gilteritinib decreased BCL6 binding to the S100A9 promoter, thereby increasing S100A9 expression. Furthermore, pharmacological inhibition of BCL6 accelerated the growth rate of gilteritinib-resistant FLT3-ITD+ AML cells, suggesting that S100A9 is a functional target of BCL6. These findings shed light on mechanisms of resistance to gilteritinib through regulation of a target that can be therapeutically exploited to enhance the antileukemic effects of gilteritinib.
| S-EPMC9153019 | biostudies-literature
Project description:Gilteritinib is a FLT3 inhibitor that has been approved for relapsed acute myeloid leukemia (AML) carrying FLT3 mutations. However, the effects of this drug on chromatin remodeling of AML cells remains unknown. We tested the state of chromatin openness of AML cells obtained from a patient before and after treatment with gilteritinib using Assay for Transposase-Accessible Chromatin with high-throughput sequencing (ATAC-seq).
2022-08-09 | GSE210617 | GEO
Project description:While clinical benefit has been observed with gilteritinib, most patients relapse through unknown mechanisms. To investigate mechanisms of gilteritinib resistance, we performed targeted genomic sequencing and single cell (sc) RNASeq on primary FLT3-ITD-mutated AML samples. Co-occurring mutations in RAS pathway genes were the most common. In gilteritinib-unresponsive patients, increased expression of bone marrow-derived hematopoietic cytokines and chemokines was observed after treatment compared to gilteritinib-sensitive patients. Expression of the TEK-family kinase, BMX, was higher in gilteritinib-unresponsive patients after treatment compared to gilteritinib-sensitive patients. BMX contributed to gilteritinib resistance in FLT3-mutant cells lines in a hypoxia-dependent manner by promoting pSTAT5 signaling, which was reversed with pharmacological inhibition and genetic knockout. In primary FLT3-mutated AML samples, pharmacological inhibition of BMX enhanced the antileukemic activity of gilteritinib and decreased chemokine expression. Gene module analysis associated gilteritinib responsiveness with lymphocyte differentiation and myeloid leukocyte activation. By contrast, unresponsiveness to gilteritinib associated with upregulation of cell-cycle, DNA/RNA metabolic processes, and protein translation. Together, these data support a role for microenvironment-mediated factors modulated by BMX in the escape from targeted therapy and gilteritinib resistance. This analysis provides a deeper understanding of targets and pathways for potential therapeutic intervention to restore gilteritinib sensitivity.
2022-07-07 | GSE199333 | GEO
Project description:BCL6 is a transcription repressor that plays a crucial role in germinal center formation and lymphomagenesis. However, its role in myeloid malignancies remains unclear. Here, we explored the role of BCL6 in acute myeloid leukemia (AML). Heterogeneous levels of BCL6 were found across AML cell lines and primary AML samples. Cells with higher levels of BCL6 were indeed sensitive to treatment with BCL6 inhibitors. Gene expression profiling of AML cells treated with BCL6 inhibitor revealed a subset of target genes that are common with lymphoma cells. Ex vivo treatment of primary AML cells with BCL6 peptide inhibitor (BPI) induced apoptosis and decrease colony forming capacity which correlated with the levels of BCL6 expression . Importantly, inhibition of BCL6 in primary AML cells with either BPI or BCL6 siRNA resulted in significant reduction of leukemia initiating capacity using immunodeficient mice, suggesting ablation of leukemia stem cells (LSC). Such anti-LSC activity was also observed as downregulation of LSC gene signatures using gene expression analyses of cells treated with a BCL6 inhibitor. Importantly, treatment with cytarabine (AraC) induced BCL6 expression, and the levels of BCL6 induction were correlated with resistance to AraC. Treatment of AML primary derived xenografts (PDX) revealed that when AraC was combined with BCL6 inhibitor, inhibition of BCL6 significantly potentiated the efficacy of AraC and improved cytotoxic effects by interfering with the leukemia initiating capacity of AML cells. This suggests that pharmacological inhibition of BCL6 might provide a novel therapeutic strategy for ablation of LSCs and overcome chemoresistance in AML.
2020-08-01 | GSE133112 | GEO
Project description:To identify differences in the gene regulation between BCL6+/+ and BCL6-/- CML cells a gene expression analysis has been performed. We investigated the gene expression pattern in BCL6+/+ cells in the presence or absence of Imatinib and a combination of Imatinib and RI-BPI (a novel retro-inverso BCL6 peptide inhibitor). In BCL6-/- CML cells, we investigated the gene expression pattern in the presence or absence of Imatinib. BCR-ABL1 transformed myeloid cells from BCL6+/+ mice were cultured in the presence or absence of 10µM Imatinib or 10µM Imatinib and 20µM RI-BPI for 16 hours. BCR-ABL1 transformed myeloid cells from BCL6-/- mice were cultured in the presence or absence of 10µM Imatinib. Two samples for each condition were processed.
2011-08-23 | E-GEOD-24813 | biostudies-arrayexpress