Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA276674 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:BCL6 orchestrates Tfh differentiation via multiple distinct mechanisms
| PRJNA257089 | ENA
Project description:T follicular helper (TFH) cells are a distinct type of CD4 T cells that are essential for most antibody and B lymphocyte responses. TFH regulation and dysregulation is involved in a range of diseases. Bcl6 is the lineage defining transcription factor of TFH cells and its activity is essential for TFH cell differentiation and function. However, how Bcl6 controls TFH biology has largely remained unclear, at least in part due to intrinsic challenges of connecting repressors to gene upregulation in complex cell types with multiple possible differentiation fates. Multiple competing models were tested here by a series of experimental approaches to determine that Bcl6 exhibits negative autoregulation and controls pleiotropic attributes of TFH differentiation and function (migration, costimulation, inhibitory receptors, and cytokines) via multiple repressor-of-repressor gene circuits.
2020-05-03 | GSE137383 | GEO
Project description:T follicular helper (TFH) cells are a distinct type of CD4 T cells that are essential for most antibody and B lymphocyte responses. TFH regulation and dysregulation is involved in a range of diseases. Bcl6 is the lineage defining transcription factor of TFH cells and its activity is essential for TFH cell differentiation and function. However, how Bcl6 controls TFH biology has largely remained unclear, at least in part due to intrinsic challenges of connecting repressors to gene upregulation in complex cell types with multiple possible differentiation fates. Multiple competing models were tested here by a series of experimental approaches to determine that Bcl6 exhibits negative autoregulation and controls pleiotropic attributes of TFH differentiation and function (migration, costimulation, inhibitory receptors, and cytokines) via multiple repressor-of-repressor gene circuits.
2020-05-03 | GSE137122 | GEO
Project description:T follicular helper (TFH) cells are a distinct type of CD4 T cells that are essential for most antibody and B lymphocyte responses. TFH regulation and dysregulation is involved in a range of diseases. Bcl6 is the lineage defining transcription factor of TFH cells and its activity is essential for TFH cell differentiation and function. However, how Bcl6 controls TFH biology has largely remained unclear, at least in part due to intrinsic challenges of connecting repressors to gene upregulation in complex cell types with multiple possible differentiation fates. Multiple competing models were tested here by a series of experimental approaches to determine that Bcl6 exhibits negative autoregulation and controls pleiotropic attributes of TFH differentiation and function (migration, costimulation, inhibitory receptors, and cytokines) via multiple repressor-of-repressor gene circuits.
2020-05-03 | GSE137121 | GEO
Project description:During the immune response, CD4+ T cells differentiate into distinct effector subtypes, including follicular helper T (Tfh) cells that help B cells, and into memory cells. Tfh and memory cells are required for long-term immunity; both depend on the transcription factor Bcl6, raising the question of whether they differentiate through similar mechanisms. Here, using notably single-cell RNA and ATAC sequencing, we show that virus-responding CD4+ T cells lacking both Bcl6 and Blimp1 can differentiate into cells with transcriptomic, chromatin accessibility and function attributes of memory cells, but not of Tfh cells. Thus, Bcl6 promotes memory cell differentiation primarily through its repression of Blimp1. These findings demonstrate that distinct mechanisms underpin the differentiation of memory and Tfh CD4+ cell and define the Bcl6-Blimp1 axis as a potential target for promoting long-term memory T cell differentiation.
2021-11-14 | GSE184847 | GEO
Project description:During the immune response, CD4+ T cells differentiate into distinct effector subtypes, including follicular helper T (Tfh) cells that help B cells, and into memory cells. Tfh and memory cells are required for long-term immunity; both depend on the transcription factor Bcl6, raising the question of whether they differentiate through similar mechanisms. Here, using notably single-cell RNA and ATAC sequencing, we show that virus-responding CD4+ T cells lacking both Bcl6 and Blimp1 can differentiate into cells with transcriptomic, chromatin accessibility and function attributes of memory cells, but not of Tfh cells. Thus, Bcl6 promotes memory cell differentiation primarily through its repression of Blimp1. These findings demonstrate that distinct mechanisms underpin the differentiation of memory and Tfh CD4+ cell and define the Bcl6-Blimp1 axis as a potential target for promoting long-term memory T cell differentiation.
2021-11-14 | GSE184846 | GEO
Project description:T Follicular helper (Tfh) cell is an effector CD4+ T cell subset specialized in helping B cells in germinal centers (GC) reactions. Although Bcl6 was identified as a Tfh-specific transcription factor essential for their development, the molecular mechanisms underlying Bcl6 regulation and Tfh cell commitment remain unclear. Here, we report that Tox2 transcription factor is highly expressed in Tfh cells, regulated by Bcl6 and STAT3. Forced expression of Tox2 drives Bcl6 expression and Tfh development. Mechanistically, Tox2 directly binds to Tfh-associated genes, including Bcl6, and functions to promote their chromatin accessibility and modulate the activities of other Tfh-regulating factors. Conversely, genetic deletion of Tox2 results in defective Tfh differentiation, and inhibiting both Tox and Tox2 in T cells abolishes Tfh differentiation and GC response. Thus, our results demonstrate that Tox2 is a key transcription factor that regulates Bcl6 expression and Tfh development and suggest a Tox2-Bcl6 axis in feed-forward regulation of Tfh program.
2019-10-30 | GSE136539 | GEO
Project description:T Follicular helper (Tfh) cell is an effector CD4+ T cell subset specialized in helping B cells in germinal centers (GC) reactions. Although Bcl6 was identified as a Tfh-specific transcription factor essential for their development, the molecular mechanisms underlying Bcl6 regulation and Tfh cell commitment remain unclear. Here, we report that Tox2 transcription factor is highly expressed in Tfh cells, regulated by Bcl6 and STAT3. Forced expression of Tox2 drives Bcl6 expression and Tfh development. Mechanistically, Tox2 directly binds to Tfh-associated genes, including Bcl6, and functions to promote their chromatin accessibility and modulate the activities of other Tfh-regulating factors. Conversely, genetic deletion of Tox2 results in defective Tfh differentiation, and inhibiting both Tox and Tox2 in T cells abolishes Tfh differentiation and GC response. Thus, our results demonstrate that Tox2 is a key transcription factor that regulates Bcl6 expression and Tfh development and suggest a Tox2-Bcl6 axis in feed-forward regulation of Tfh program.
2019-10-30 | GSE136538 | GEO
Project description:T Follicular helper (Tfh) cell is an effector CD4+ T cell subset specialized in helping B cells in germinal centers (GC) reactions. Although Bcl6 was identified as a Tfh-specific transcription factor essential for their development, the molecular mechanisms underlying Bcl6 regulation and Tfh cell commitment remain unclear. Here, we report that Tox2 transcription factor is highly expressed in Tfh cells, regulated by Bcl6 and STAT3. Forced expression of Tox2 drives Bcl6 expression and Tfh development. Mechanistically, Tox2 directly binds to Tfh-associated genes, including Bcl6, and functions to promote their chromatin accessibility and modulate the activities of other Tfh-regulating factors. Conversely, genetic deletion of Tox2 results in defective Tfh differentiation, and inhibiting both Tox and Tox2 in T cells abolishes Tfh differentiation and GC response. Thus, our results demonstrate that Tox2 is a key transcription factor that regulates Bcl6 expression and Tfh development and suggest a Tox2-Bcl6 axis in feed-forward regulation of Tfh program.
2019-10-30 | GSE136537 | GEO
Project description:Tfh cells are required for T cell help to B cells, and BCL6 is the defining transcription factor of Tfh cells. However, the functions of Bcl6 in Tfh have largely remained unclear. Here we defined the BCL6 cistrome in primary human germinal center Tfh cells to assess mechanisms of BCL6 regulation of CD4 T cells, comparing and contrasting BCL6 function in T and B cells. BCL6 primarily acts as a repressor in Tfh cells, and BCL6 binding was associated with control of Tfh cell migration and repression of alternative cell fates. Interestingly, although some BCL6 bound genes possessed BCL6 DNA binding motifs, many BCL6-bound loci were instead characterized by the presence of DNA motifs for AP1 or STAT. AP1 complexes are key positive downstream mediators of TCR signaling and external stimuli. We show that BCL6 can directly bind AP1, and BCL6 depends on AP1 for recruitment to BCL6 binding sites with AP1 motifs, suggesting that BCL6 subverts AP1 activity. These findings reveal that BCL6 has broad and multifaceted effects on Tfh biology, and provide insight into how this master regulator mediates distinct cell-context dependent phenotypes. Sorted naM-CM-/ve tonsil cells were activated with anti-CD3+CD28 Ab coated beads and transduced with BCL6 or control lentiviral vectors as described. RNA was isolated at day 5 following LV infection and microarrays performed as discussed herein. RNA was isolated with the RNeasy Micro Kit (QIAGEN). The quantity and quality of the RNA were confirmed with a NanoDrop 2000c (Thermo Fisher Scientific) and an Experion Electrophoresis System (Bio-Rad). Samples (20 ng) were amplified with Illumina MessageAmp II aRNA Amplification Kits (Ambion), hybridized to HumanHT-12_V4 BeadChips (Illumina), and quantified with Genome Studio (Illumina). Normalized data (heatmap of blood cells) or raw data (heatmap of tonsil cells and Volcano plot) were analyzed with the GenePattern software suite.
2015-03-01 | E-GEOD-66373 | biostudies-arrayexpress