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Murine bone marrow-derived mast cells (BMMCs) transduced with pAPM lentiviruses overexpressing miR-221 vs control overexpressing miR-221m.

ABSTRACT: Bone marrow-derived mast cells were derived from three different female C57Bl/6 mice of similar age. Cells were transduced with pAPM lentiviruses either overexpressing microRNA-221 or a non functional microRNA-221 mutant, termed miR-221m, where four point-mutations were introduced in the seed sequence of miR-221. The samples overexpressing miR-221m were used as references for the corresponding miR-221 overexpressing BMMCs from the same mouse (mouse matched reference). The experiment was performed in order to gain more insights about the molecular mechanisms underlying miR-221 effects in mast cells.

ORGANISM(S): Mus musculus

PROVIDER: GSE24462 | GEO | 2011/11/23

SECONDARY ACCESSION(S): PRJNA132755

REPOSITORIES: GEO

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Murine bone marrow-derived mast cells (BMMCs) transduced with pAPM lentiviruses overexpressing miR-221 vs control overexpressing miR-221m.

Project description:Bone marrow-derived mast cells were derived from three different female C57Bl/6 mice of similar age. Cells were transduced with pAPM lentiviruses either overexpressing microRNA-221 or a non functional microRNA-221 mutant, termed miR-221m, where four point-mutations were introduced in the seed sequence of miR-221. The samples overexpressing miR-221m were used as references for the corresponding miR-221 overexpressing BMMCs from the same mouse (mouse matched reference). The experiment was performed in order to gain more insights about the molecular mechanisms underlying miR-221 effects in mast cells. Two-condition experiment, BMMC overexpressing miR-221 vs BMMC overexpressing miR-221m. Biological replicates: 3 replicates overexpressing miR-221, 3 control replicates overexpressing miR-221m.

2011-11-23 | E-GEOD-24462 | biostudies-arrayexpress

Mus musculus

Project description:Murine bone marrow-derived mast cells (BMMCs) transduced with pAPM lentiviruses overexpressing miR-221 vs control overexpressing miR-221m.

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MicroRNA profiling of mouse bone marrow-derived mast cells during mucosal differentiation and IgE-mediated activation

Project description:The aim of this study was to investigate microRNA expression pattern and its functional relevance on the commitment toward mucosal differentiation and on IgE-mediated activation of mast cells. To identify microRNA genes the expression of which change during the differentiation and activation of murine primary mast cells in vitro, the putative committed progenitors (c-kit+ cells isolated on day 6 from differentiating cultures), immature mast cells (BMMC), mucosal-type mast cells (MMC), and IgE-activated mast cells were compared by Agilent microRNA array. RNA was isolated by miRNeasy (Qiagen) from: 1) c-kit+ cells, isolated from differentiating cultures (in the presence of IL3 and SCF) derived from the bone marrow using MACS column purification, 2) immature BMMCs obtained by cultivation of bone marrow cells in the presence of IL3 and SCF for 4 weeks, 3) mucosal-type mast cells by additional differentiation of immature BMMCs for 5 days by supplementation of IL9 and TGFbeta, and 4) activated mast cells by presensitization with anti-DNP IgE followed by IgE-crosslinking by DNP-antigen challenge for 2 hours. Agilent microRNA microarray was run on these experimental groups. Four biological replicates were included in every experimental group.

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Microarray analysis of naïve bone marrow derived mast cells (BMMCs) and BMMCs 4hr post ionomycin activation

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Mast Cell Maturation is Driven via a Novel Group III Phospholipase A2-Prostaglandin D2-DP1 Receptor Paracrine Axis

Project description:Microenvironment-based alterations in mast cell phenotypes influence the susceptibility to anaphylaxis, yet the mechanisms underlying proper maturation of mast cells toward an anaphylaxis-sensitive phenotype are incompletely understood. Here we report that PLA2G3, a mammalian homolog of anaphylactic bee venom phospholipase A2, regulates this process. PLA2G3 secreted from mast cells is coupled with fibroblastic lipocalin-type PGD2 synthase (L-PGDS) to provide PGD2, which facilitates mast cell maturation via PGD2 receptor (DP1). Mice lacking PLA2G3, L-PGDS or DP1, mast cell-deficient mice reconstituted with PLA2G3- or DP1-null mast cells, or mast cells cocultured with L-PGDS-ablated fibroblasts exhibited impaired mast cell maturation and anaphylaxis. Thus, we describe a lipid-driven PLA2G3-L-PGDS-DP1 loop that drives mast cell maturation. Mast cell maturation; immature and mature bone marrow-derived mast cells (BMMCs); Four-condition experiment (mature BMMCs vs immature BMMCs, Pla2g3M-bM-^@M-^S/M-bM-^@M-^S vs Pla2g3+/+); 3 replicates of Pla2g3+/+ BMMCs, 4 replicates of Pla2g3M-bM-^@M-^S/M-bM-^@M-^S BMMCs, 4 replicates of Pla2g3+/+ cocultured BMMCs, 3 replicates of Pla2g3M-bM-^@M-^S/M-bM-^@M-^S cocultured BMMCs

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Microarray analysis of naïve bone marrow derived mast cells (BMMCs) and BMMCs 4hr post ionomycin activation

Project description:Gene expression profile of BMMCs four hours post activation with ionomycin compared to naive BMMCs.

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Protein expression profile of miR-33b overexpressing ES-2 cells upon OCM treatment

Project description:Omentum conditioned medium (OCM) is known to enhance ovarian cancer oncogenesis. In this study, miR-33b exerts tumor suppressive effects on ovarian cancer cells in response to omentum conditioned medium (OCM) treatment. To identify the molecular mechanism and main biological pathways involved in the tumor inhibiting activity by miR-33b in the ovarian cancer metastasis. To achieve this, miR-33b was stably overexpressed in ovarian cancer cell line ES-2, and the protein expression profile of miR-33b overexpressing ES-2 cells upon OCM treatment was determined.

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