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RNA-seq of mouse macrophages to investigate how interferon gene therapy reprograms the leukemia microenvironment

ABSTRACT: Bulk transcriptome profiling of macrophages isolated from the spleen of control and tumor-bearing mice, treated or not with IFN gene therapy.

INSTRUMENT(S): NextSeq 500

ORGANISM(S): Mus musculus

SUBMITTER: Luigi Naldini

PROVIDER: E-MTAB-6482 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Interferon gene therapy reprograms the leukemia microenvironment inducing protective immunity to multiple tumor antigens

Project description:Single-cell transcriptome profiling using a 3' droplet-based platform (Chromium,10x Genomics) of CD11b+ cells isolated from the spleen of control and tumor-bearing mice, treated or not with IFN gene therapy.

2019-05-16 | E-MTAB-6487 | biostudies-arrayexpress

miR-126 Orchestrates an Oncogenic Program in B-Cell Precursor Acute Lymphoblastic Leukemia

Project description:MicroRNA (miRNA)-126 is a known regulator of hematopoietic stem cell quiescence. We engineered murine hematopoiesis to express miRNA-126 across all differentiation stages. Thirty percent of mice developed monoclonal B cell leukemia, which was prevented or regressed when a tetracycline-repressible miRNA-126 cassette was switched off. Regression was accompanied by upregulation of cell-cycle regulators and B cell differentiation genes, and downregulation of oncogenic signaling pathways. Expression of dominant-negative p53 delayed blast clearance upon miRNA-126 switch-off, highlighting the relevance of p53 inhibition in miRNA-126 addiction. Forced miRNA-126 expression in mouse and human progenitors reduced p53 transcriptional activity through regulation of multiple p53-related targets. miRNA-126 is highly expressed in a subset of human B-ALL, and antagonizing miRNA-126 in ALL xenograft models triggered apoptosis and reduced disease burden. Study 1: Turning off miR-126 expression from an experimental murine B-ALL in vivo; Study 2: Modulation of miR-126 expression in human cord blood stem and progenitor cell populations in vitro.

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RNAseq of the spleen of Hbb(th3/+) mice transplanted with bone marrow from Tfr2-ko or Tfr2 wt mice

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Proteomics on sera of mice following local high-dose heart irradiation

Project description:Background and Purpose: Cardiotoxicity is a well-known adverse effect of radiation therapy. Measurable abnormalities in the heart function indicate advanced and often irreversible heart damage. Therefore, early detection of cardiac toxicity is necessary to delay and alleviate the development of the disease. The present study investigated long-term serum proteome alterations following local heart irradiation using a mouse model with the aim to detect biomarkers of radiation-induced cardiac toxicity. Materials and Methods: Serum samples from C57BL/6J mice were collected 20 weeks after local heart irradiation with 8 Gy or 16 Gy X-ray; the controls were sham-irradiated. The samples were analyzed by quantitative proteomics based on data-independent acquisition mass spectrometry. The proteomics data were further investigated using bioinformatics and ELISA. Results: The analysis showed radiation-induced changes in the level of several serum proteins involved in the acute phase response, inflammation and cholesterol metabolism. We found significantly enhanced expression of pro-inflammatory cytokines (TNF-, TGF-, IL-1 and IL-6) in the serum of the irradiated mice. The level of free fatty acids, total cholesterol, low density lipoprotein (LDL) and oxidized LDL was increased whereas that of high density lipoprotein was decreased by irradiation. Conclusions: This study provides information on systemic effects of heart irradiation. It elucidates a radiation fingerprint in the serum that may be used to elucidate adverse cardiac effects after radiation therapy.

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gamma-catenin (junction plakoglobin, Jup) dependent signals mediate the progression of BCR-ABL1+ B-ALL

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