Whole-genome sequencing in gastric cancer (part2)
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ABSTRACT:
PROVIDER: EGAS00001006575 | EGA |
REPOSITORIES: EGA
Similar Datasets
Project description:UBTF tandem duplications (UBTF-TD) were identified frequently in relapsed pediatric acute myeloid leukemia. The purpose of this study is to investigate the functional consequence of the overexpression of UBTF-TD in normal cord blood CD34+ cells.
2022-02-22 | GSE189901 | GEO
Project description:T follicular helper (Tfh) cell migration into germinal centers (GC) is essential for the generation of GC B cells and antibody responses to T dependent (TD) antigens. This process requires interactions between LFA-1 on Tfh cells and ICAMs on B cells. The mechanisms underlying defective antibody responses to TD antigens in DOCK8 deficiency are incompletely understood. We show that mice selectively lacking DOCK8 in T cells have impaired IgG antibody responses to TD antigens, decreased GC size, and reduced numbers of GC B cells. However, they develop normal numbers of Tfh cells with intact capacity for driving B cell differentiation into a GC phenotype in vitro. Notably, migration of DOCK8 deficient T cells into GCs is defective. Following TCR/CD3 ligation, DOCK8 deficient T cells have impaired LFA-1 activation and reduced binding to ICAM-1. DOCK8 is important for LFA1-dependent positioning of Tfh cells in GCs, and thereby the generation of GC B cells and IgG antibody responses to TD antigen.
2020-07-23 | GSE154897 | GEO
Project description:Whole-genome tiling arrays were used to validate deletions and tandem duplications that were inferred based on next-generation sequencing data. The arrays were generated for six samples of the Drosophila melanogaster Genetic Reference Panel (DGRP) as well as the Berkeley reference strain. Structural variations (SVs) were assessed by comparing probe intensities within the region of interest between the sample for which the SV was predicted and the reference strain.
2012-11-29 | E-MTAB-1105 | biostudies-arrayexpress
Project description:Somatic genome rearrangements are thought to play important roles in cancer development. We optimized a long span paired-end-tag (PET) sequencing approach using 10 Kb genomic DNA inserts to study human genome structural variations (SVs). The use of 10 Kb insert size allows the identification of breakpoints within repetitive or homology containing regions of a few Kb in size and results in a higher physical coverage compared to small insert libraries with the same sequencing effort. We have applied this approach to comprehensively characterize the SVs of 15 cancer and 2 non-cancer genomes and used a filtering approach to strongly enrich for somatic SVs in the cancer genomes. Our analyses revealed that most inversions, deletions, and insertions are germline SVs, whereas tandem duplications, unpaired inversions, inter-chromosomal translocations, and complex rearrangements are overrepresented among somatic rearrangements in cancer genomes. We demonstrate that the quantitative and connective nature of DNA-PET data is precise in delineating the genealogy of complex rearrangement events, we observe signatures which are compatible with breakage-fusion-bridge cycles, and discover that large duplications are among the initial rearrangements that trigger genome instability for extensive amplification in epithelial cancers. Structural variations of 15 human cancer samples and 2 human normal samples were identified by long span paired-end sequencing
2011-04-06 | E-GEOD-26954 | biostudies-arrayexpress
Project description:UBTF tandem duplications (TD) have recently emerged as a subtype-defining alteration in pediatric acute myeloid leukemia (pAML), which is characterized by HOXB gene dysregulation and a poor response to conventional chemotherapy. Here, we use protein-protein interaction studies to show that UBTF-TD maintains interactions with components of the RNA pol I complex, while also engaging with a network of unique protein interactors specific to UBTF-TD, like KMT2A. These data suggest that UBTF- TD both preserves canonical UBTF functions and demonstrates gain of function activities. Furthermore, we show that UBTF-TD and KMT2A co-localize to key genomic targets dysregulated in UBTF-TD myeloid malignancies, like HOXB gene clusters and MEIS1. Using a protein degradation system, we show that stemness, proliferation, and the HOXB molecular signature are dependent on sustained UBTF-TD localization to chromatin. Finally, we show UBTF-TD leukemias are sensitive to menin inhibition—providing a viable therapeutic strategy for children with this high-risk AML subtype.
2024-02-12 | GSE229664 | GEO
Project description:UBTF tandem duplications (TD) have recently emerged as a subtype-defining alteration in pediatric acute myeloid leukemia (pAML), which is characterized by HOXB gene dysregulation and a poor response to conventional chemotherapy. Here, we use protein-protein interaction studies to show that UBTF-TD maintains interactions with components of the RNA pol I complex, while also engaging with a network of unique protein interactors specific to UBTF-TD, like KMT2A. These data suggest that UBTF- TD both preserves canonical UBTF functions and demonstrates gain of function activities. Furthermore, we show that UBTF-TD and KMT2A co-localize to key genomic targets dysregulated in UBTF-TD myeloid malignancies, like HOXB gene clusters and MEIS1. Using a protein degradation system, we show that stemness, proliferation, and the HOXB molecular signature are dependent on sustained UBTF-TD localization to chromatin. Finally, we show UBTF-TD leukemias are sensitive to menin inhibition—providing a viable therapeutic strategy for children with this high-risk AML subtype.
2024-02-12 | GSE229663 | GEO
Project description:UBTF tandem duplications (TD) have recently emerged as a subtype-defining alteration in pediatric AML (pAML), which is characterized by HOXB gene dysregulation and a poor response to conventional chemotherapy. Here, we use protein-protein interaction studies to show that UBTF-TD maintains interactions with components of the RNA pol I complex, while also engaging with a network of unique protein interactors specific to UBTF-TD, like KMT2A. These data suggest that UBTF-TD both preserves canonical UBTF functions and demonstrates gain of function activities. Furthermore, we show that UBTF-TD and KMT2A co-localize to key genomic targets dysregulated in UBTF-TD leukemias, like HOXB gene clusters and MEIS1. Using a protein degradation system, we show that stemness, proliferation, and the HOXB molecular signature are dependent on sustained UBTF-TD localization to chromatin. Finally, we show UBTF-TD leukemias are sensitive to menin inhibition—providing a viable therapeutic strategy for children with this high-risk AML subtype
2025-11-06 | PXD041253 | Pride
Project description:UBTF tandem duplications (UBTF-TD) define a high-risk molecular subtype of acute myeloid leukemia (AML) characterized by poor clinical outcomes. While menin inhibitors have shown therapeutic promise, acquired resistance remains a significant challenge. Here, we use proteomic, genomic, and functional analyses to uncover mechanisms underlying UBTF-TD mediated leukemogenesis. We show that TDs create nuclear export signal (NES) motifs, which mediate interactions with Exportin-1 (XPO1) and chromatin-associated partners. These interactions drive aberrant chromatin binding and transcriptional activation of genes commonly dysregulated in UBTF-TD tumors, including the HOXA/HOXB clusters. We demonstrate that these NES motifs are critical for mislocalization of UBTF-TD proteins, cellular transformation, and transcriptional dysregulation. Importantly, we identify the XPO1 inhibitor eltanexor as a potential therapeutic strategy. Eltanexor treatment disrupts UBTF-TD chromatin localization, reduces tumor burden, and promotes differentiation in preclinical models. These findings provide mechanistic insights into UBTF-TD-driven leukemogenesis and highlight XPO1 inhibition as a promising therapy for UBTF-TD AMLs.
2025-10-01 | GSE290440 | GEO
Project description:UBTF tandem duplications (UBTF-TD) define a high-risk molecular subtype of acute myeloid leukemia (AML) characterized by poor clinical outcomes. While menin inhibitors have shown therapeutic promise, acquired resistance remains a significant challenge. Here, we use proteomic, genomic, and functional analyses to uncover mechanisms underlying UBTF-TD mediated leukemogenesis. We show that TDs create nuclear export signal (NES) motifs, which mediate interactions with Exportin-1 (XPO1) and chromatin-associated partners. These interactions drive aberrant chromatin binding and transcriptional activation of genes commonly dysregulated in UBTF-TD tumors, including the HOXA/HOXB clusters. We demonstrate that these NES motifs are critical for mislocalization of UBTF-TD proteins, cellular transformation, and transcriptional dysregulation. Importantly, we identify the XPO1 inhibitor eltanexor as a potential therapeutic strategy. Eltanexor treatment disrupts UBTF-TD chromatin localization, reduces tumor burden, and promotes differentiation in preclinical models. These findings provide mechanistic insights into UBTF-TD-driven leukemogenesis and highlight XPO1 inhibition as a promising therapy for UBTF-TD AMLs.
2025-10-01 | GSE290439 | GEO
Project description:UBTF tandem duplications (UBTF-TD) define a high-risk molecular subtype of acute myeloid leukemia (AML) characterized by poor clinical outcomes. While menin inhibitors have shown therapeutic promise, acquired resistance remains a significant challenge. Here, we use proteomic, genomic, and functional analyses to uncover mechanisms underlying UBTF-TD mediated leukemogenesis. We show that TDs create nuclear export signal (NES) motifs, which mediate interactions with Exportin-1 (XPO1) and chromatin-associated partners. These interactions drive aberrant chromatin binding and transcriptional activation of genes commonly dysregulated in UBTF-TD tumors, including the HOXA/HOXB clusters. We demonstrate that these NES motifs are critical for mislocalization of UBTF-TD proteins, cellular transformation, and transcriptional dysregulation. Importantly, we identify the XPO1 inhibitor eltanexor as a potential therapeutic strategy. Eltanexor treatment disrupts UBTF-TD chromatin localization, reduces tumor burden, and promotes differentiation in preclinical models. These findings provide mechanistic insights into UBTF-TD-driven leukemogenesis and highlight XPO1 inhibition as a promising therapy for UBTF-TD AMLs.
2025-10-01 | GSE290438 | GEO