Similar Datasets
Project description:Chronic inflammation and tissue fibrosis are common stress responses that worsen organ function, yet their crosstalk is poorly understood. Here, we show that conditional deletion of the transcription co-activator Brd4 in Cx3cr1-positive myeloid cells ameliorates heart failure and is associated with a dramatic reduction in fibroblast activation. We identified a specific BRD4-occupied enhancer in Cx3cr1-positive cells that controls expression of Interleukin-1 beta (Il1b), and show that secreted IL1B activates a p65/RELA-dependent enhancer downstream of MEOX1, driving a profibrotic response in human cardiac fibroblasts. In vivo, antibody-mediated IL1B neutralization prevented stress-induced expression of MEOX1, inhibited fibroblast activation, and improved cardiac function in heart failure. The elucidation of BRD4-dependent crosstalk between a specific immune cell subset and fibroblasts through IL1B provides new therapeutic strategies for heart disease and other disorders of chronic inflammation and maladaptive tissue remodeling.
2024-07-03 | GSE221696 | GEO
Project description:Chronic inflammation and tissue fibrosis are common stress responses that worsen organ function, yet their crosstalk is poorly understood. Here, we show that conditional deletion of the transcription co-activator Brd4 in Cx3cr1-positive myeloid cells ameliorates heart failure and is associated with a dramatic reduction in fibroblast activation. We identified a specific BRD4-occupied enhancer in Cx3cr1-positive cells that controls expression of Interleukin-1 beta (Il1b), and show that secreted IL1B activates a p65/RELA-dependent enhancer downstream of MEOX1, driving a profibrotic response in human cardiac fibroblasts. In vivo, antibody-mediated IL1B neutralization prevented stress-induced expression of MEOX1, inhibited fibroblast activation, and improved cardiac function in heart failure. The elucidation of BRD4-dependent crosstalk between a specific immune cell subset and fibroblasts through IL1B provides new therapeutic strategies for heart disease and other disorders of chronic inflammation and maladaptive tissue remodeling.
2024-07-03 | GSE221695 | GEO
Project description:Chronic inflammation and tissue fibrosis are common stress responses that worsen organ function, yet their crosstalk is poorly understood. Here, we show that conditional deletion of the transcription co-activator Brd4 in Cx3cr1-positive myeloid cells ameliorates heart failure and is associated with a dramatic reduction in fibroblast activation. We identified a specific BRD4-occupied enhancer in Cx3cr1-positive cells that controls expression of Interleukin-1 beta (Il1b), and show that secreted IL1B activates a p65/RELA-dependent enhancer downstream of MEOX1, driving a profibrotic response in human cardiac fibroblasts. In vivo, antibody-mediated IL1B neutralization prevented stress-induced expression of MEOX1, inhibited fibroblast activation, and improved cardiac function in heart failure. The elucidation of BRD4-dependent crosstalk between a specific immune cell subset and fibroblasts through IL1B provides new therapeutic strategies for heart disease and other disorders of chronic inflammation and maladaptive tissue remodeling.
2024-07-03 | GSE221694 | GEO
Project description:Chronic inflammation and tissue fibrosis are common stress responses that worsen organ function, yet the molecular mechanisms governing their crosstalk are poorly understood. In diseased organs, stress-induced changes in gene expression fuel maladaptive cell state transitions and pathological interaction between diverse cellular compartments. Although chronic fibroblast activation worsens dysfunction of lung, liver, kidney, and heart, and exacerbates many cancers, the stress-sensing mechanisms initiating the transcriptional activation of fibroblasts are not well understood. Here, we show that conditional deletion of the transcription co-activator Brd4 in infiltrating Cx3cr1-positive myeloid cells ameliorates heart failure and is associated with a dramatic reduction in fibroblast activation. Analysis of single-cell chromatin accessibility and BRD4 occupancy in vivo in Cx3cr1-positive cells identified a large enhancer proximal to Interleukin-1 beta (Il1b), and a series of CRISPR deletions revealed the precise stress-dependent regulatory element that controlled expression of Il1b in disease. Secreted IL1B functioned non-cell autonomously to activate a p65/RELA-dependent enhancer near the transcription factor MEOX1, resulting in a profibrotic response in human cardiac fibroblasts. In vivo, antibody-mediated IL1B neutralization improved cardiac function and tissue fibrosis in heart failure. Mechanistically, systemic IL1B inhibition or targeted Il1b deletion in Cx3cr1-positive cells prevented stress-induced expression of MEOX1 and inhibited fibroblast activation. The elucidation of BRD4-dependent crosstalk between a specific immune cell subset and fibroblasts through IL1B provides new therapeutic strategies for heart disease and other disorders of chronic inflammation and maladaptive tissue remodeling.
2024-07-03 | GSE247261 | GEO
Project description:Chronic inflammation and tissue fibrosis are common stress responses that worsen organ function, yet their crosstalk is poorly understood. Here, we show that conditional deletion of the transcription co-activator Brd4 in Cx3cr1-positive myeloid cells ameliorates heart failure and is associated with a dramatic reduction in fibroblast activation. We identified a specific BRD4-occupied enhancer in Cx3cr1-positive cells that controls expression of Interleukin-1 beta (Il1b), and show that secreted IL1B activates a p65/RELA-dependent enhancer downstream of MEOX1, driving a profibrotic response in human cardiac fibroblasts. In vivo, antibody-mediated IL1B neutralization prevented stress-induced expression of MEOX1, inhibited fibroblast activation, and improved cardiac function in heart failure. The elucidation of BRD4-dependent crosstalk between a specific immune cell subset and fibroblasts through IL1B provides new therapeutic strategies for heart disease and other disorders of chronic inflammation and maladaptive tissue remodeling.
2024-07-03 | GSE221698 | GEO
Project description:Chronic inflammation and tissue fibrosis are common stress responses that worsen organ function, yet their crosstalk is poorly understood. Here, we show that conditional deletion of the transcription co-activator Brd4 in Cx3cr1-positive myeloid cells ameliorates heart failure and is associated with a dramatic reduction in fibroblast activation. We identified a specific BRD4-occupied enhancer in Cx3cr1-positive cells that controls expression of Interleukin-1 beta (Il1b), and show that secreted IL1B activates a p65/RELA-dependent enhancer downstream of MEOX1, driving a profibrotic response in human cardiac fibroblasts. In vivo, antibody-mediated IL1B neutralization prevented stress-induced expression of MEOX1, inhibited fibroblast activation, and improved cardiac function in heart failure. The elucidation of BRD4-dependent crosstalk between a specific immune cell subset and fibroblasts through IL1B provides new therapeutic strategies for heart disease and other disorders of chronic inflammation and maladaptive tissue remodeling.
2024-07-03 | GSE221693 | GEO
Project description: Not available
| S-EPMC4241450 | biostudies-literature
Project description:This SuperSeries is composed of the SubSeries listed below.
2024-01-04 | GSE240182 | GEO
Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series
2013-08-06 | E-GEOD-48112 | biostudies-arrayexpress
Project description: Not available
| S-EPMC5899445 | biostudies-literature