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T cell-specific RIPK1 ablation results in villus atrophy of the duodenum in mice

ABSTRACT: RIPK1 is required in T cells with a history of CD4-expression to maintain intestinal homeostasis. We show that the pathology in the upper intestine is a result of conventional T cell apoptosis in absence of the RIPK1.

ORGANISM(S): Mus musculus

PROVIDER: GSE263990 | GEO | 2025/03/05

REPOSITORIES: GEO

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T cell-specific RIPK1 ablation results in villus atrophy of the duodenum in mice

Project description:T cell-specific RIPK1 ablation results in villus atrophy of the duodenum in mice

| PRJNA1100505 | ENA

Next Generation Sequencing to check the enrichment of RIPK1/BAF on chromatin, RIPK1-dependent chromatin state and RIPK1-dependent transcriptome during inflammatory responses.

Project description:RIPK1 is a master regulator of multiple cell death pathways, including apoptosis and necroptosis, and inflammation. Multiple RIPK1 inhibitors have been advanced into human clinical trials as new therapeutics for human inflammatory and neurodegenerative diseases, including ALS and AD. However, while the mechanism of cytosolic RIPK1 in control of cell death has been extensively investigated, how the activation of RIPK1 may promote transcription of proinflammatory cytokines is unclear as a nuclear function of RIPK1 has not been explored, nor is it clear if and how RIPK1 kinase activity may directly mediate inflammation independent of cell death. Here we show that nuclear RIPK1 is recruited by specific transcription factors and binds to the BAF complex on active enhancers and promoters marked by H3K4me1 and H3K27ac. Nuclear RIPK1 mediates the phosphorylation of SMARCC2, a key component of the BAF complex, to promote chromatin remodeling and the transcription of specific proinflammatory genes. Our results suggest that RIPK1 kinase serves a transcriptional coregulator in nucleus that can transmit extracellular stimuli to BAF complex to modulate the chromatin accessibility and directly regulate the transcription of specific genes involved in mediating inflammatory responses.

2022-07-13 | GSE179018 | GEO

Transcriptional profiles of PA1 teratoma cells transfected by RIPK1, RIPK2, RIPK3, or RIPK4

Project description:RIPK4 but not the related kinases RIPK1, RIPK2, and RIPK3 caused similar transcriptional changes to Wnt3a. PA1 cells were transfected by 8ug RIPK1, RIPK2, RIPK3, or RIPK4 for 48h, RNA were extracted and sequenced.

2013-02-04 | E-GEOD-43362 | biostudies-arrayexpress

Quantitative Transcriptome Analysis of RIPK1-KO CD4 T cells

Project description:RIPK1 is a key signaling molecule controlling cell death and inflammation through both scaffold and kinase functions of RIPK1. Human RIPK1 deficiency causes immunodeficiency and inflammatory diseases. Here we analyzed the functional roles of RIPK1 in CD4 T cells.

2022-02-27 | GSE197232 | GEO

SENP1 prevents steatohepatitis by suppressing RIPK1-driven apoptosis and inflammation

Project description:The mechanism underlying RIPK1-driven cell death and inflammation, a key process in the progression of nonalcoholic steatohepatitis, remains unclear. Here we identified SENP1, a SUMO-specific protease, as a key endogenous inhibitor of RIPK1. SENP1 is progressively reduced in proportion to NASH severity in patients. Hepatocyte-specific SENP1-knockout mice develop spontaneous NASH-related phenotypes in a RIPK1 kinase-dependent manner. We demonstrate that SENP1 deficiency sensitizes cells to RIPK1 kinase-dependent apoptosis by promoting RIPK1 activation following TNFα stimulation. Mechanistically, SENP1 deSUMOylates RIPK1 in TNF-R1 signaling complex (TNF-RSC), keeping RIPK1 in check. Loss of SENP1 leads to SUMOylation of RIPK1, which re-orchestrates TNF-RSC and modulates the ubiquitination patterns and activity of RIPK1. Notably, genetic inhibition of RIPK1 effectively reverses disease progression in hepatocyte-specific SENP1-knockout male mice with high-fat-diet-induced nonalcoholic fatty liver. We propose that deSUMOylation of RIPK1 by SENP1 provides a pathophysiologically relevant cell death-restricting checkpoint that modulates RIPK1 activation in the pathogenesis of nonalcoholic steatohepatitis.

2022-10-20 | GSE193509 | GEO

Genome wide Affymetric Microarray analysis for RIPK1 dependent inflammatory changes in Bone Marrow Derived Macrophages (BMDMs)

Project description:Gene level expression estimate using the Whole Transcript (WT) Assay approach of the Gene 1.0 ST Array System for Mouse. This assay was done to identify the RIPK1-dependent gene expression changes in mouse BMDMs. Cost-effective gene-level analysis based on whole-transcript coverage. We analyzed Bone Marrow Derived Macrophages (BMDMs) under 4 different conditions (Control, LPS, LPS/zVAD, LPS/zVAD/Nec-1) to assess inflammatory changes in RIPK1 kinase dependent manner compared to LPS, LPS/zVAD plus RIPK1 inhibitor Nec-1 and control.

2016-09-07 | E-GEOD-72797 | biostudies-arrayexpress

Reduction of intestinal RIPK1 ameliorates HFD-induced metabolic disorders in female mice

Project description:Background Metabolic disorders including obesity, impaired glucose tolerance, dyslipidemia, and insulin resistance constitute a global public health problem that increases the risk of cardiovascular and type 2 diabetes. In modern society, a major cause of metabolic disorder is excessive nutrient intake from food. Therefore, as the main site of nutrient absorption, the intestine plays an important role in diet-induced metabolic disorders. However, it is still largely unknown on how the intestine participates in such a process. Results Here we show that ‘ileal jejunization’ is responsible for high-fat diet-induced metabolic disorders in female mice. Upon HFD-feeding, the transcriptional profile of the ileum was shifted towards that of jejunum which is characterized by increased expression of jejunal feature genes. Accordantly, the lipids uptake was increased in the ileum. Importantly, the HFD-induced ileal jejunization and metabolic disorders can be profoundly attenuated by intestinal-specific reduction of RIPK1. Interestingly, the HFD-induced increase in the expression of the jejunal feature genes in the ileum, and the effect of RIPK1 reduction were not observed in male mice.

2025-03-05 | GSE282889 | GEO

RIPK1 kinase-dependent gene expression in human astrocytes in vitro

Project description:To determine the role of RIPK1 kinase-dependent transcriptional signaling in human fetal-derived astrocytes, we stimulated cells with the RIPK1 kinase-activating stimulus TNF/Smac/zVAD in the presence or absence of the RIPK1 kinase inhibitor Nec-1s. We identified various genes modulated in a RIPK1 kinase-dependent manner in human astrocytes, and the main biological pathways were related to an interferon signaling and anti-viral response.

2021-08-12 | GSE172027 | GEO

RIPK1 kinase-dependent gene expression in mouse microglia and astrocytes in vitro

Project description:To determine the role of RIPK1 kinase-dependent transcriptional signaling in microglia and astrocytes, we stimulated cells with RIPK1 kinase-activating stimuli TNF/5z-7 and TNF/Smac/zVAD in the presence or absence of the RIPK1 kinase inhibitor Nec-1s. We identified various genes modulated in a RIPK1 kinase-dependent manner with each stimulation in both microglia and astrocytes, and the main biological pathways were related to an inflammatory and immune response. We identified many cytokines and chemokines upregulated in both microglia and astrocytes upon RIPK1 kinase activation, demonstrating the contribution of RIPK1 kinase signaling to pro-inflammatory responses in microglia and astrocytes

2021-08-12 | GSE154230 | GEO

Cooperation of TRADD- and RIPK1-dependent Cell Death Pathways in Maintaining Intestinal Homeostasis

Project description:Dysfunctional NF-kB signaling is critically involved in Inflammatory bowel disease (IBD). We investigated the mechanism by which RIPK1 and TRADD, two key mediators of NF-kB signaling, in mediating intestinal pathology using TAK1 IEC deficient model. We show that phosphorylation of TRADD by TAK1 modulates RIPK1-dependent apoptosis. TRADD and RIPK1 act cooperatively to mediate cell death mediated by TNF and TLR signaling. We demonstrate the pathological evolution from RIPK1-dependent ileitis to RIPK1- and TRADD-co-dependent colitis in TAK1 IEC deficient condition. Combined RIPK1 inhibition and TRADD knockout completely protect against intestinal pathology and lethality in TAK1 IEC KO mice. Furthermore, we identify distinctive microbiota dysbiosis biomarkers for RIPK1-dependent ileitis and TRADD-dependent colitis. These findings reveal the cooperation between RIPK1 and TRADD in mediating cell death and inflammation in IBD with NF-kB deficiency and suggest the possibility of combined RIPK1 kinase inhibition and TRADD knockout as a new therapeutic strategy for IBD.

2025-01-22 | GSE279034 | GEO

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