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Human basophil expression profiles (in vitro) (Ref12)

ABSTRACT: Human basophils were examined in vitro for changes in their mRNA expression profiles during stimulation under a variety of conditions. Basophils were obtained from two sources prior to purification, residual cell packs from leukapheresis procedures (which represent the 80% of the sample results) or by venipuncture. For cells obtained by leukapheress, purification included application of elutration, 2-step Percoll gradients and negative selection on Miltenyi columns using StemSep basophil isolation antibodies (see J. Immunol. Methods, 385:51, 2012). For cells obtained by venipuncture, purification included application of 2-step Percoll gradients following by negative selection on Miltenyi columns using StemSep basophil isolation antibodies. The time from subject donation to the start of an in vitro study (first lysis for mRNA) ranged from 6-7 hours for leukapheresis packs to 4-5 hours for venipuncture. Basophil purities averaged 99% for these studies. For most of the studies, purified basophils were incubated in RPMI-1640 media supplemented with human serum albumin (0.03%), 20 µg/ml gentamycin and glutamine (as glutamax) for several hours to 3 days depending on the stimulus. For most experiments, the day 0 lysis acted as the initial control in order to examine profiles for changes due to simple culture. The study included stimulation with interleukin-3, inteleukin-33, interleukin-5, interleukin-2, nerve growth factor, anti-IgE antibody (6061P, Hybridoma Labs, Maryland) or fmet-leu-phe (FMLP) and the sample title indicates the mode and length of stimulation.

ORGANISM(S): Homo sapiens

PROVIDER: GSE64639 | GEO | 2015/03/20

SECONDARY ACCESSION(S): PRJNA271591

REPOSITORIES: GEO

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Human basophil expression profiles (in vitro) (Ref 8)

Project description:Human basophils were examined in vitro for changes in their mRNA expression profiles during stimulation under a variety of conditions. Basophils were obtained from two sources prior to purification, residual cell packs from leukapheresis procedures (which represent the 80% of the sample results) or by venipuncture. For cells obtained by leukapheress, purification included application of elutration, 2-step Percoll gradients and negative selection on Miltenyi columns using StemSep basophil isolation antibodies (see J. Immunol. Methods, 385:51, 2012). For cells obtained by venipuncture, purification included application of 2-step Percoll gradients following by negative selection on Miltenyi columns using StemSep basophil isolation antibodies. The time from subject donation to the start of an in vitro study (first lysis for mRNA) ranged from 6-7 hours for leukapheresis packs to 4-5 hours for venipuncture. Basophil purities averaged 99% for these studies. For most of the studies, purified basophils were incubated in RPMI-1640 media supplemented with human serum albumin (0.03%), 20 µg/ml gentamycin and glutamine (as glutamax) for several hours to 3 days depending on the stimulus. For most experiments, the day 0 lysis acted as the initial control in order to examine profiles for changes due to simple culture. The study included stimulation with interleukin-3, inteleukin-33, interleukin-5, interleukin-2, nerve growth factor, anti-IgE antibody (6061P, Hybridoma Labs, Maryland) or fmet-leu-phe (FMLP) and the sample title indicates the mode and length of stimulation.

2015-03-20 | GSE64638 | GEO

Human leukocyte expression profiles (in vitro)

Project description:CD34+ progenitor cells were cultured for 0 or 21 days in StemPro medium + supplement + IL-3 at 5 ng/ml Basophils, eosinophils and plasmacytoid dendritic cells were purified to near homogeneity and lysed for miRNA and mRNA. Basophils were purified by negative selection (StemSep Abs, miltenyi columns), eosinophils by StemSep Abs and pDC by positive selection after removing monocytes. The method starting with a 2-step Percoll gradient that put eosinophils in the pellet, basophils in the middle layer and pDC in the upper layer.

2019-11-08 | GSE138609 | GEO

Cebpa regulates gene transcription in basophils

Project description:To investigate the mechanisms by which C/EBPa drives basophil differentiation and maintains basophil identity, we examined whether or not C/EBPa promotes basophil molecular programming and simultaneously represses mast cell molecular programming. We performed genome-wide gene expression profiling on basophils and mast cells and found that 6798 genes were shared by mast cells and basophils; 2033 genes were expressed 2-10 (log2 1-3.3)-fold higher in basophils (differentially expressed in basophils); and 413 genes were expressed greater than 10 (log2 3.3)-fold in basophils (highly expressed in basophils). On the other hand, we found 569 genes were expressed 2-10 (log2 -1 to -3.3) fold higher in mast cells and 171 genes were highly expressed in mast cells [greater than 10 fold (log2 -3.3)]. We treated purified basophils prepared from Cebpaf/f RosaYFP/creER mice and Cebpa+/+ RosaYFP/creER control mice with or without 4HT treatment for five days. Gene expression in the treated basophils was analyzed using microarray analysis. Overall, deletion of C/EBPa in basophils resulted in a reduction of mRNA expression for 248 genes and led to an increase in mRNA expression for 255 genes. The majority of the C/EBPa-regulated genes were either differentially or highly expressed in basophils or mast cells. In this study, we compared gene expression in basophils and mast cell and identified genes which specifically expressed in basophils and mast cells. By using Cebpa conditional knock out mice, we identified Cebpa regulated genes in basophils.

2013-04-01 | E-GEOD-41596 | biostudies-arrayexpress

Identification of novel activation marker and regulator of human basophils via transcriptomic analysis of IL-3-stimulated basophils

Project description:Human basophils regulate allergic immune responses by releasing histamine and effector cytokines such as interleukin 4 (IL-4) and IL-13. IL-3/IL-3R signaling axis plays key roles in the maturation, survival and activation of basophils. We and others have shown that IL-3-induced surface receptors e.g. ST2 and IL-17RB regulate the biology of basophils. We in this study aim to identify new basophil activation maker and regulator by transcriptomic analysis of IL-3-stimulated basophils.

2021-01-01 | GSE144096 | GEO

Gene expression profiles of pre-basophils versus mature basophils stimulated with antigen/IgE- or IL-3-stimulation.

Project description:Basophils are the least common granulocytes which represent less than 1% of peripheral blood leukocytes. Recent development of analytical tools for basophils enables us to understand their critical roles in allergic reactions and protection from parasitic infections. Nevertheless, the differentiation trajectory of basophils remains unclear. We have identified previously-unappreciated pre-basophil subpopulation which encompasses previously-defined basophil precursors (BaPs) in a series of experiments including scRNA-seq analysis (deposited to GSE206589). In this study, we explored gene expression profiles of pre-basophils and mature basophils activated by antigen/IgE-stimulation or IL-3-stimulation. We have revealed that IL-3 activated pre-basophils displayed distinct gene expression profiles from antigen/IgE- or IL-3-stimulated mature basophils, suggesting the unuque property of pre-basophils.

2023-03-21 | GSE222701 | GEO

Cebpa regulates gene transcription in basophils

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Gene expression profiles of basophil progenitors, CD34- pre-basophils and mature basophils

Project description:In this study, we explored gene expression profiles of CD34-CLEC12Ahi pre-basophils isolated from the bone marrow as well as CD34-CLEC12Alo mature basophils from the bone marrow and CD34+ basophil progenitors. We revealed that the gene expression of mature basophils isolated from the bone marrow and spleen resembled each other whereas pre-basophils and mature basophils showed distinct gene expression profiles.

2023-03-21 | GSE206591 | GEO

Transcriptomic analysis of murine splenic basophils in steady-state or on day 14 of Trichuris muris infection

Project description:Whole transcriptome analysis of genes expressed by spleen basophils in response to gasttrointestinal helminth infection, compared to naïve animals, analyzing the role of basophil-intrinsic Notch signaling using a basophil specific inhibition of Notch (Mcpt8Cre-DNMAML)

2019-04-08 | GSE129056 | GEO

Comparison of global gene expression between reactive and anergic human basophils after anti-FCERIA stimulation

Project description:Basophil functional state was determined using the Flow2CAST Basophil Activation Test (BAT). Human basophils were isolated from whole blood of three house dust mite (HDM) responsive donors with reactive basophils and two donors with anergic basophils. Basophil isolation was performed using the EasySep Human Basophil Enrichment kit (Stemcell). Purity of the basophils was determined by flow cytometry and ranged from 96 - 99%. For stimulation, 75,000 basophils were incubated for 4 hr with or without 50 ul of anti-FCERI antibody (Bühlmann Laboratories) in a total volume of 200 ul of Stimulation Buffer provided by the Flow2CAST kit. After incubation, the basophils were collected and re-suspended in TRIzol Reagent (Life Technologies). Total RNA was extracted using double extraction protocol using the guanidinium thiocyanate-phenol-chloroform extraction (Trizol Invitrogen), followed by a Qiagen RNeasy Micro clean-up procedure. cDNA and ST-ssDNA were prepared, fragmented and labeled according to Nugen WT Ovation Pico RNA Amplification and WT Ovation Exon kit and Encore Biotin protocols. The labeled ssDNA was hybridized on the Affymetrix Human GeneChip 1.0 ST Arrays, which subsequently were processed and stained using GeneChip Fluidics Station 450. The stained GeneChip Arrays were scanned in the Microarray Facility at the Biopolis Shared Facility using a GeneChip Scanner 3000. Quality control for the Arrays was performed using the Affymetrix Expression Console Software.

2017-06-15 | GSE70013 | GEO

Basophils prime group 2 innate lymphoid cells for neuropeptide-mediated inhibition [RNA-seq]

Project description:Type 2 cytokine responses promote parasitic immunity and initiate tissue repair but, can also result in immunopathologies when not properly restricted. Basophilia is recognized as a common feature of type 2 inflammation, however, the roles basophils play in regulating these responses remain unknown. Here, we demonstrate that helminth-induced ILC2 responses are exaggerated in the absence of basophils, resulting in increased inflammation and diminished lung function. Additionally, we show that ILC2s from basophil-depleted mice express reduced levels of the receptor for the neuropeptide, neuromedin B (NMB). Critically, NMB stimulation inhibited ILC2 responses from control but not basophil-depleted mice, and basophils were sufficient to directly enhance NMB receptor (NMBR) expression on ILC2s. These studies suggest that basophils prime ILC2s to respond to neuron-derived signals necessary to maintain tissue integrity. Further, these data provide mechanistic insight into the functions of basophils and identify NMB as a potent inhibitor of type 2 inflammation.

2020-07-20 | GSE152913 | GEO

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