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DNA copy number analysis from mice with radiation-induced acute myeloid leukemia

ABSTRACT: Certain mouse strains such as CBA, C3H and RFM, have high incidence of radiation-induced acute myeloid leukemia (AML). The data in this serie was generated by using spleen DNA from CBA mice which were irraidated with either gamma-rays or heavy ion (HZE) particles. Spleen DNA with radiation-induced AML was compared with DNA from normal CBA mice. Comparison of spleen DNA from CBA mice with radiation-induced AML vs genomic DNA from normal CBA mice

ORGANISM(S): Mus musculus

SUBMITTER: Lianghao Ding

PROVIDER: E-GEOD-37233 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Molecular characterisation of murine acute myeloid leukaemia induced by 56Fe ion and 137Cs gamma ray irradiation.

Steffen Leta S LS Bacher Jeffery W JW Peng Yuanlin Y Le Phuong N PN Ding Liang-Hao LH Genik Paula C PC Ray F Andrew FA Bedford Joel S JS Fallgren Christina M CM Bailey Susan M SM Ullrich Robert L RL Weil Michael M MM Story Michael D MD

Mutagenesis 20120917 1

Exposure to sparsely ionising gamma- or X-ray irradiation is known to increase the risk of leukaemia in humans. However, heavy ion radiotherapy and extended space exploration will expose humans to densely ionising high linear energy transfer (LET) radiation for which there is currently no understanding of leukaemia risk. Murine models have implicated chromosomal deletion that includes the hematopoietic transcription factor gene, PU.1 (Sfpi1), and point mutation of the second PU.1 allele as the p ...[more]

PMID: 22987027

Similar Datasets

DNA copy number analysis from mice with radiation-induced acute myeloid leukemia

Project description:Certain mouse strains such as CBA, C3H and RFM, have high incidence of radiation-induced acute myeloid leukemia (AML). The data in this serie was generated by using spleen DNA from CBA mice which were irraidated with either gamma-rays or heavy ion (HZE) particles. Spleen DNA with radiation-induced AML was compared with DNA from normal CBA mice.

2012-10-05 | GSE37233 | GEO

aCGH analysis was performed in the spleen of Î²cat(ex3)osb mice

Project description:Cells of the osteoblast lineage affect homing, number of long term repopulating hematopoietic stem cells (HSCs) HSC mobilization and lineage determination and Blymphopoiesis . More recently osteoblasts were implicated in pre-leukemic conditions in mice. Yet, it has not been shown that a single genetic event taking place in osteoblastscan induce leukemogenesis. We show here that in mice, an activating mutation of Î²-catenin leading to development of acute myeloid leukemia (AML) with common chromosomal aberrationsand cell autonomous progression. Activated Î²-catenin stimulates expression of the Notch ligand Jagged-1 in osteoblasts. Subsequent activation of Notch signaling in HSCprogenitors induces the malignant changes. Demonstrating the pathogenetic role of theNotch pathway, genetic or pharmacological inhibition of Notch signaling ameliorates AML. Nuclear accumulation and increased Î²-catenin signaling in osteoblasts was also identified in 38% ofpatients with MDS/AML. These patients showed increased Notch signaling in hematopoietic cells. These findings demonstrate that genetic alterations in osteoblasts can induce AML, identify molecular signals leading to this transformation and suggest a potential novel pharmacotherapeuticapproach to AML. The present entry describes a comparison of copy numbers of DNA from Î²cat(ex3)osb mice from the mouse spleen with that of WT (C57BL/J Mice) mice. DNA from spleen myeloid cells from Î²cat(ex3)osb mice and WT mice were hybridized to Agilent CGH 244A arrays. DNA from spleen myeloid cells from Î²cat(ex3)osb mice in C57BL/J background was labeled with red dye. DNA from spleen myeloid cells from WT (C57BL/J) mice were labeled with green dye. There were five arrays with DNA from 1 mouse of each genotype per array.

2014-01-21 | E-GEOD-51690 | biostudies-arrayexpress

Expression analysis of the first-generation offspring of irradiated male mice

Project description:Investigation of whole genome gene expression level changes in kidney, brain, liver and spleen of the offspring of CBA/Ca and BALB/c male mice exposed to 1 Gy of acute X-rays The pattern of gene expression of a number of circadian rhythm genes in the offspring of irradiated males is compromised A twenty-two 12x135K chip study using total RNA extracted from kidney, brain, liver and spleen of control CBA/Ca and BALB/c male mice and the first-generation offspring of male mice exposed to 1 Gy of acute X-rays. The expression of 42,575 genes was measured with two-fold technical redundancy.

2012-12-17 | E-GEOD-42621 | biostudies-arrayexpress

Effect of transgenic human IL8 on gene expression in mouse colon cancer tumors

Project description:mRNA expression in colon cancer tumores of CBA/C57BL/6 transgenic mice bearing a BAC which contains the human IL8 gene and promoter was compared to that of CBA/C57BL/6 controls. A. CBA/C57BL/6 mice controls (n=3) B. human IL8 transgenic CBA/C57BL/6 mice (n=3).

2013-01-11 | E-GEOD-39273 | biostudies-arrayexpress

Phosphoproteomic profiling of D816V-KIT cells

Project description:Acute Myeloid Leukaemia (AML) carries a 5 year survival rate of just 24%. Toxic chemotherapy regimens remain the backbone of standard of care for AML. The KIT tyrosine kinase is a recognised AML oncogene, associated with poor outcome. We recently identified DNA-PK as a novel therapeutic target in FLT3 mutant AML. The similarity between KIT and FLT3 regulated signalling pathways led us to investigate DNA-PK in KIT-mutant AML.

2023-01-26 | PXD030005 | Pride

Genome-wide study of DNA methylation in AML by MeDIP-seq

Project description:Methylated DNA immunoprecipitation followed by high-throughput sequencing (MeDIP-seq) has the potential to identify changes in DNA methylation important in cancer development. In order to understand the role of epigenetic modulation in the development of acute myeloid leukemia (AML) we have applied MeDIP-seq to the DNA of 12 AML patients and 4 normal bone marrows. This analysis revealed leukemia-associated differentially methylated regions that included gene promoters, gene bodies, CpG islands and CpG island shores. Two genes (SPHKAP and DPP6) with significantly methylated promoters were of interest and further analysis of their expression showed them to be repressed in AML. We also demonstrated considerable cytogenetic subtype specificity in the methylomes affecting different genomic features. Significantly distinct patterns of hypomethylation of certain interspersed repeat elements were associated with cytogenetic subtypes. The methylation patterns of members of the SINE family tightly clustered all leukemic patients with an enrichment of Alu repeats with a high CpG density (P < 0.0001). We were able to demonstrate significant inverse correlation between intragenic interspersed repeat sequence methylation and gene expression with SINEs showing the strongest inverse correlation (R2 = 0.7). We conclude that the alterations in DNA methylation that accompany the development of AML affect not only the promoters, but also the non-promoter genomic features, with significant demethylation of certain interspersed repeat DNA elements being associated with AML cytogenetic subtypes. MeDIP-seq data were validated using bisulfite pyrosequencing and the Infinium array. Examination of DNA methylation of 12 AML patients versus normal bone marrow from 4 healthy donors

2012-04-02 | E-GEOD-28314 | biostudies-arrayexpress

A genome-wide transcriptomic analysis of radiation-responsive genes in the radiation-resistant fungus, C. neoformans

Project description:The basidiomycetous fungus Cryptococcus has been known as radiation resistant fungi and is found in highly radioactive environments such as the damaged nuclear reactor at Chernobyl. Although Cryptococcus exhibits greater resistant for gamma radiation than the model yeast Saccharomyces cerevisiae, the resistant mechanism of gamma radiation remains elusive. To elucidate a unique regulatory system for radiation-resistance in C. neoformans, we performed genome-wide comparative analysis through DNA microarray analysis using C. neoformans WT strain (serotype A, H99 strain) responding gamma radiation. Based on the transcriptome analysis, genes involved in DNA damage repair systems (RAD51, RDH54, and RAD54) were significantly increased in response to gamma radiation. Actually, rad54â?? and rdh54â?? mutants exhibited sensitivity against both gamma radiation and DNA damage inducers. Furthermore, genes regarding to molecular chaperone and ubiquitination systems were strongly induced. In contrast, expression levels of genes related to protein synthesis, fatty acids/sterols synthesis, and other cellular molecules. Especially, ergosterol homeostasis is required for gamma radiation resistance. Furthermore, radiation-induced genes such as RIG4, RIG5, and RIG6 in C. neoformans play critical roles in gamma radiation resistance. Taken together, the transcriptome analysis contributes to understanding unique molecular mechanism of radiation-resistant fungus C. neoformans. To elucidate transcriptome change during recovery process post irrdiation, samples were taken at three time interval (30 min, 60 min, and 120 min). The three independent DNA microarry with three independent biological replicates were analyzed to obtain high reliability.

2016-06-01 | E-GEOD-80230 | biostudies-arrayexpress

DNA methylation data from human liver, frontal cortex, spleen and colon

Project description:DNA methylation data from human tissues: 5 samples each of normal liver, frontal cortex, spleen and colon. 5 samples of colon tumor. Genomic DNA was isolated and hybridized to custom-designed Nimblegen microarrays (CHARM human array v1). 4 normal tissues and 1 colon tumor

2010-08-28 | E-GEOD-23841 | biostudies-arrayexpress

Isolation of spleen lymph during leukemia development

Project description:Here we asked whether infiltration of leukemic blasts initiated a response that could be detected in the interstitial fluid phase of the spleen in a rat model known to mimic human acute myeloid leukemia (AML). By cannulating efferent lymphatic vessels, we were able to monitor the response of the spleen microenvironment during leukemia development. Flow cytometric analysis of lymphocytes isolated from spleen lymph showed increased STAT3 and CREB signaling, and proteins related to these pathways were identified with a different profile in leukemic when compared with control spleen lymph. Additionally, SPARC-like 1 protein, recently identified as a promoter of AML cell growth and a biomarker of patient outcome, was locally produced in the spleen and upregulated in the leukemic setting. Thus, interstitial fluid, and its surrogate efferent lymph, can be used to provide unique information about spleen responses and substances released to the general circulation during leukemia development.

2023-06-23 | PXD011399 | Pride

De novo copy number variations in cloned dogs (Nimblegen)

Project description:De novo copy number variations in cloned dogs from the same nuclear donor In this study, we aimed to identify de novo post-cloning CNV events and estimated the rate of CNV mosaicism in cloned dogs with the identical genetic background. We analyzed CNVs in seven cloned dogs using the nuclear donor genome as reference by array-CGH

2013-12-17 | E-GEOD-49092 | biostudies-arrayexpress

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