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

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

ORGANISM(S): Mus musculus

PROVIDER: GSE207235 | GEO | 2022/09/27

REPOSITORIES: GEO

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

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

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

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

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Project description:Purpose: To transcriptome widely reveal 5-mC regulation by Tet2, we performed bisulfite-sequencing of mRNAs from Tet2-deficient BMMCs and the control cells.Methods: Mouse BMMCs were generated from bone marrow cells in RPMI-1640 medium with recombinant mouse IL-3 and SCF. BMMCs were stained to confirm the surface expression of FcɛRI and c-Kit. Cells with purity >97.5% were used for RNA isolation. Results: We carried out an unbiased global analysis of m5C in poly(A)RNA of mouse bone marrow derived mast cells (BMMCs).We show that there were indeed much more mCs in Tet2-deficient group compared with the control, more than half of which located in genic region. Furthermore, we observed that although much less mCs distributed in the three elements of exon regions, more mCs located in 3`-UTR for Tet2-deficient group compared with the control.

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Project description:Non-T cell activation linker (NTAL, also called Lab or LAT2) is a transmembrane adaptor protein involved in the high affinity IgE receptor (FcεRI) signaling in mast cells. Studies with bone marrow-derived mast cells (BMMCs) from NTAL-/- mice indicated that NTAL is a negative regulator of FcεRI signaling. In contrast, depletion of NTAL by RNA interference in human or rat mast cells suggested its positive regulatory role. To determine whether compensatory developmental alterations are responsible for the observed discrepancies, we compared FcεRI-mediated signaling events in BMMCs isolated from NTAL-/- mice or BMMCs of wild type in which NTAL expression was decreased by RNA interference. We found that when compared to corresponding controls, NTAL-deficient cells, both knockouts (KOs) and knockdowns (KDs), exhibited enhanced degranulation, calcium mobilization, tyrosine phosphorylation of linker for activation of T cells (LAT) and ERK, depolymerization of filamentous actin and chemotaxis. These data indicate that NTAL in mouse BMMCs is a negative regulator of FcεRI signaling, independently of compensatory developmental alterations. To gain more insight into NTAL function, we examined gene expression profiles of resting and antigen-activated BMMCs with NTAL KO or KD and corresponding controls and identified several genes that were more than 1.8-fold differentially expressed in resting and FcεRI-activated NTAL-deficient cells, when compared to wild-type controls. We provide evidence that at least some of these genes could be involved in regulation of cholesterol-dependent events in chemotaxis towards antigen.

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