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Comparison of gene expression profiles of FCRL5+/CD21-/lo/CD27- and FCRL5-/CD21-/lo/CD27- peripheral B cells from healthy donors

ABSTRACT: To compare gene expression profile of FCRL5+ and FCRL5- tissue-like memory B cells (CD21-/lo/CD27-/CD19+), we have employed whole genome microarray expression profiling to identify differentially regulated genes in these two B cell subgroups. B cells freshly isolated from leukapheresis of healthy donors were used in the experiment.

ORGANISM(S): Homo sapiens

PROVIDER: GSE66470 | GEO | 2016/04/26

SECONDARY ACCESSION(S): PRJNA277027

REPOSITORIES: GEO

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Homo sapiens

Project description:Comparison of gene expression profiles of FCRL5+/CD21-/lo/CD27- and FCRL5-/CD21-/lo/CD27- peripheral B cells from healthy donors

| PRJNA277027 | ENA

Transcription profiling of human heumatoid arthritis or common variable immunodeficiency patients reveals defective receptor editing results in the appearance of anergic B cells in humans

Project description:B cell tolerance is established using deletion, anergy and receptor editing mediated by secondary recombination but it is unclear why autoreactive B cells choose a tolerance mechanism over another. We identified subgroups of patients with either rheumatoid arthritis or common variable immunodeficiency who presented defects in secondary recombination, which correlated with unusual CD21-/lo naïve B cells in their blood. CD21-/lo B cells were unable to induce calcium flux, get activated or proliferate in response to B cell receptor and/or CD40 triggering, suggesting that these B cells are anergic. Moreover, CD21-/lo B cells are often autoreactive and may express anti-nuclear antibodies. Thus, anergy can be a default tolerance mechanism mainly induced when receptor editing fails to silence developing autoreactive B cells. Experiment Overall Design: RNA was extracted from batch sorted CD19+CD21+CD10-CD27- and CD19+CD21-CD10-CD27- naïve B cells isolated from donors using the Absolutely RNA microprep kit (Stratagene). 100-200 ng of RNA was obtained per sample, and the quality of the purified RNA was assessed by the Bioanalyzer from Agilent. Using the Ovation biotin system kit from Nugen, 30-50ng of RNA was amplified and labeled to produce cDNA. Labeled cDNA was hybridized on chips containing the whole human genome (Human Genome U133 2.0 from Affymetrix). Data from CD21+ and CD21- B cell populations were compared in order to determine the gene signature of the newly described CD21- B cells.

2009-12-04 | E-GEOD-13917 | biostudies-arrayexpress

Expansion of an FCRL5+ B cell subset resembling atypical memory B cells in an animal model of malaria

Project description:Background: In human malaria, parasites of the genus Plasmodium elicit expansion of atypical memory B cells (atMBCs), which lack the classical markers CD21 and CD27. We have identified a putative population of analogous B cells in a murine model of infection with P. chabaudi, delineated by the marker FCRL5. We performed RNA-Seq on FCRL5+ and FCRL5- B cells sorted from infected mice, so as to characterize the transcriptional profile of these cells and permit comparison to atMBCs in humans. Results: FCRL5+ B cells were found to have distinct transcriptional profiles from FCRL5- B cells, with approximately 400 genes exhibiting significant differences between the two groups. Additionally, about 25% of these differentially expressed genes were also differentially expressed in human atMBCs versus classical MBCs, as previously described by Sullivan et al (PLoS Pathogens 2015). Conclusions: FCRL5+ class-switched B cells are a transcriptionally distinct subset arising in P. chabaudi infection, with transcriptional similarities to human atMBCs that develop in chronic malaria settings.

2019-04-16 | GSE85205 | GEO

Complement receptor 2/CD21– human naive B cells contain mostly autoreactive unresponsive clones

Project description:Complement receptor 2–negative (CR2/CD21–) B cells have been found enriched in patients with autoimmune diseases and in common variable immunodeficiency (CVID) patients who are prone to autoimmunity. However, the physiology of CD21–/lo B cells remains poorly characterized. We found that some rheumatoid arthritis (RA) patients also display an increased frequency of CD21–/lo B cells in their blood. A majority of CD21–/lo B cells from RA and CVID patients expressed germline autoreactive antibodies, which recognized nuclear and cytoplasmic structures. In addition, these B cells were unable to induce calcium flux, become activated, or proliferate in response to B-cell receptor and/or CD40 triggering, suggesting that these autoreactive B cells may be anergic. Moreover, gene array analyses of CD21–/lo B cells revealed molecules specifically expressed in these B cells and that are likely to induce their unresponsive stage. Thus, CD21–/lo B cells contain mostly autoreactive unresponsive clones, which express a specific set of molecules that may represent new biomarkers to identify anergic B cells in humans.

2009-12-01 | GSE13917 | GEO

Transcriptome differences in FCRL5 positive and negative Influenza-specific memory B cells

Project description:We examined the transcriptional differences between circulating B cell subsets post-vaccination. Using FCRL5 as a marker of Tbet expressing B cells, we sorted FCRL5+ (Tbet+) and FCRL5- (Tbet-) memory B cells, naïve B cells, and antibody secreting plasmablasts at day 7 and day 14 post-vaccination. Additionally, we used H1 B cell tetramers to track cells responding to the influenza vaccine. These data provide insights into the transcriptional programming of distinct B cell subsets that respond to influenza vaccination.

2023-03-01 | GSE163989 | GEO

Accessible chromatin differences in FCRL5 positive and negative influenza-specific memory B cells

Project description:We examined the accessible chromatin differences between circulating B cell subsets post-vaccination. Using FCRL5 as a marker of Tbet expressing B cells, we sorted FCRL5+ (Tbet+) and FCRL5- (Tbet-) memory B cells, and antibody secreting plasmablasts at day 7 and day 14 post-vaccination. Additionally, we used H1 B cell tetramers to track cells responding to the influenza vaccine in a subset of samples. These data provide insights into the accessible chromatin landscape of distinct B cell subsets that respond to influenza vaccination.

2023-03-01 | GSE203112 | GEO

Transcriptional profile of B cells isolated from neonatal and adult hearts

Project description:We have identified four distinct B cell subgroups within the naïve murine heart, whose relative expression changed markedly throughout development, including CD19+CD11b+CD5+, CD19+CD11b+CD5-, CD19+CD11b-CD21+CD23+, and CD19+CD11b-CD21-CD23- B cells. In order to gain further insight into the identity of the various myocardial B cells subsets, we performed single cell RNA sequencing (scRNAseq) of neonatal (2 weeks) and adult (8 weeks) myocardial B cells. We combined 10X single cell gene expression analysis with immunostaining using TotalSeq antibodies against CD11b, CD23, and CD21.

2020-09-08 | GSE153568 | GEO

RNA sequencing analysis of ex vivo expanded CD27+CD70- and CD27-CD70+ human regulatory T cells

Project description:Our study shows that after extended stimulation of human CD4+CD25+CD127- Tregs in vitro, a stable cell subset that downregulates CD27 and upregulates CD70 develops. Expanded CD27+CD70- Tregs display a gene profile which closely relates to the previously described “Treg gene signature”, whereas CD27-CD70+ Tregs express some genes associated with Treg gene signature and some genes overexpressed in conventional T cells.

2020-07-10 | GSE129251 | GEO

Transcriptomic profile of cord blood B cells and thymic B cell subsets in human neonates

Project description:We reported two major thymic B cell subsets (CD21+CD35+ and CD21-CD35-) with different morphology, functions and transcriptome profile. For this purpose, mRNA was extracted from cord blood CD19+ B cells and thymic B cells (CD21+CD35+ and CD21-CD35-) from neonatal donors ranged between 1 day and 4 months and sequenced using Illumina HiSeq4000.

2020-09-30 | GSE152453 | GEO

Fc receptor-like 4 (FCLR4) and Fc receptor-like receptor 5 (FCRL5) define and control human atypical memory B cells [RNA-Seq]

Project description:We performed NGS on Ig heavy chain V sequences amplified from RNA obtained from human tonsillar B cell subsets. From these NGS data, we reconstructed ongoing B cell responses as lineage trees, providing crucial in vivo developmental context. Each memory subset typically maintained its lineage, denoting mechanisms enforcing their phenotypes. FCRL4-FCRL5+ cells were the most represented memory subset in lineage trees, indicating robust participation in ongoing responses. Affinity maturation of both FCRL4-FCRL5+ and FCRL4+FCRL5+ atypical memory cells was stalled in chronic streptococcus infection, conceivably due to negative feedback from IgG immune complexes. We propose that FCRL4 and FCRL5 function as sensors of immune complexes, thus controlling atypical memory B cell responses.

2020-08-04 | GSE145519 | GEO

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