Nascent RNA sequencing defines dynamic aryl hydrocarbon receptor signaling responses to wood smoke particles
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA704405 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR13772342_1.fastq.gz | Fastqsanger.gz | |||
| SRR13772342_2.fastq.gz | Fastqsanger.gz | |||
| SRR13772343_1.fastq.gz | Fastqsanger.gz | |||
| SRR13772343_2.fastq.gz | Fastqsanger.gz | |||
| SRR13772344_1.fastq.gz | Fastqsanger.gz |
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Project description:Transcriptional responses to wildfire smoke, an increasingly important cause of human morbidity, are poorly understood. Here, using a combination of precision nuclear run-on sequencing (PRO-seq) and the assay for transposase-accessible chromatin using sequencing (ATAC-seq), we identify rapid and dynamic changes in transcription and chromatin structure in Beas-2B airway epithelial cells after exposure to wood smoke particles (WSP). By comparing 30 and 120 minutes of WSP exposure, we defined three distinct temporal patterns of transcriptional induction and chromatin responses to WSP. Whereas transcription of canonical targets of the aryl hydrocarbon receptor (AHR), such as CYP1A1 and AHRR, was robustly increased after 30 minutes of WSP exposure, transcription of these genes and associated enhancers returned to near baseline at 120 minutes. ChIP-qPCR assays and AHR knockdown confirmed a role for AHR in regulating these transcriptional responses, and we applied bioinformatics approaches to identify novel AHR-regulated pathways and targets including the DNA methyltransferase, DNMT3L, and its interacting factor, SPOCD1. Our analysis also defined a role for NFkB as a primary transcriptional effector of WSP-induced changes in gene expression. The kinetics of AHR- and NFkB-regulated responses to WSP were distinguishable based on the timing of both transcriptional responses and chromatin remodeling, with induction of several cytokines implicated in maintaining the NFkB response. In aggregate, our data establish a direct and primary role for AHR in mediating airway epithelial responses to WSP and identify crosstalk between AHR and NFkB signaling in controlling pro-inflammatory gene expression.
2021-02-24 | GSE167371 | GEO
Project description:Transcriptional responses to wildfire smoke, an increasingly important cause of human morbidity, are poorly understood. Here, using a combination of precision nuclear run-on sequencing (PRO-seq) and the assay for transposase-accessible chromatin using sequencing (ATAC-seq), we identify rapid and dynamic changes in transcription and chromatin structure in Beas-2B airway epithelial cells after exposure to wood smoke particles (WSP). By comparing 30 and 120 minutes of WSP exposure, we defined three distinct temporal patterns of transcriptional induction and chromatin responses to WSP. Whereas transcription of canonical targets of the aryl hydrocarbon receptor (AHR), such as CYP1A1 and AHRR, was robustly increased after 30 minutes of WSP exposure, transcription of these genes and associated enhancers returned to near baseline at 120 minutes. ChIP-qPCR assays and AHR knockdown confirmed a role for AHR in regulating these transcriptional responses, and we applied bioinformatics approaches to identify novel AHR-regulated pathways and targets including the DNA methyltransferase, DNMT3L, and its interacting factor, SPOCD1. Our analysis also defined a role for NFkB as a primary transcriptional effector of WSP-induced changes in gene expression. The kinetics of AHR- and NFkB-regulated responses to WSP were distinguishable based on the timing of both transcriptional responses and chromatin remodeling, with induction of several cytokines implicated in maintaining the NFkB response. In aggregate, our data establish a direct and primary role for AHR in mediating airway epithelial responses to WSP and identify crosstalk between AHR and NFkB signaling in controlling pro-inflammatory gene expression.
2021-02-24 | GSE167370 | GEO
Project description:Nascent RNA sequencing defines dynamic aryl hydrocarbon receptor signaling responses to wood smoke particles [ATAC-seq]
| PRJNA704406 | ENA
Project description:Nascent RNA sequencing defines dynamic aryl hydrocarbon receptor signaling responses to wood smoke particles [PRO-seq]
| PRJNA704407 | ENA
Project description:This SuperSeries is composed of the SubSeries listed below.
2021-02-24 | GSE167372 | GEO
Project description:The heterogeneity of respirable particulates and compounds complicates our understanding of transcriptional responses to air pollution. Here, we address this by applying precision nuclear run-on sequencing and the assay for transposase-accessible chromatin sequencing to measure nascent transcription and chromatin accessibility in airway epithelial cells after wood smoke particle (WSP) exposure. We used transcription factor enrichment analysis to identify temporally distinct roles for ternary response factor-serum response factor complexes, the aryl hydrocarbon receptor (AHR), and NFκB in regulating transcriptional changes induced by WSP. Transcription of canonical targets of the AHR, such as CYP1A1 and AHRR, was robustly increased after just 30 min of WSP exposure, and we discovered novel AHR-regulated pathways and targets including the DNA methyltransferase, DNMT3L. Transcription of these genes and associated enhancers rapidly returned to near baseline by 120 min after exposure. The kinetics of AHR- and NFκB-regulated responses to WSP were distinguishable based on the timing of both transcriptional responses and chromatin remodeling, with induction of several cytokines implicated in maintaining NFκB-mediated responses through 120 min of exposure. In aggregate, our data establish a direct and primary role for AHR in mediating airway epithelial responses to WSP and identify crosstalk between AHR and NFκB signaling in controlling proinflammatory gene expression. This work also defines an integrated genomics-based strategy for deconvoluting multiplexed transcriptional responses to heterogeneous environmental exposures.
| S-EPMC8517214 | biostudies-literature
Project description:Climate change is impacting human health through a historic rise in wildfire smoke across the United States and the world. Whereas the deleterious effects of wildfire smoke and associated air pollution on asthma outcomes are well-established epidemiologically, genetic risks and molecular mechanisms of how wildfire smoke affects asthma are unknown. This knowledge gap hinders the identification of high-risk individuals and the creation of targeted therapies or recommendations to protect these individuals. Here, we employ a genetic approach to identify common variant (minor allele frequency > 0.05) exposure-conditional genetic risk variants that localize with genomic responses to wood smoke particles (WSP), a model of wildfire smoke exposure, and associate with asthma in the Genetic Epidemiology Research on Aging (GERA) cohort. Our novel approach used nascent transcriptional signatures derived from WSP-exposed Beas-2B airway epithelial cells to reduce the genome sequence for discovery and allow a permutation-based statistical approach to identify 52 candidate SNPs. We applied biologic and bioinformatic filters to prioritize variants for direct testing of allele-dependent transcriptional regulatory function in plasmid reporters. The rs3861144 variant identified by this approach controls WSP responses of airway epithelial cells to SPRY2, which we showed is involved in mechanical injury repair in cell culture. Our results demonstrate that wildfire particulates contribute to asthma risk at the molecular level, and we have identified mechanistic targets and genetic variant candidates to apply for clinical risk prediction and development of targeted therapies for high-risk individuals.
2024-12-02 | GSE283113 | GEO
Project description:Increase in frequency and size of wildfire raises a significant public health concern due to rapid climate change. Epidemiological studies have shown that wildfire smoke exposure can increase the risk of neurological disorders. Our study aims to understand how wildfire smoke particles affect brain endothelial cells using both primary human brain microvascular endothelial cells (HBMEC) and an immortalized human cerebral microvascular endothelial cell line (hCMEC/D3). HBMEC and hCMEC/D3 were exposed to different levels of smoldering eucalyptus smoke particles (10, 30, 50 ug/mL) for 24 hr. Supernatants were collected for LDH and ELISA array, cell lysates were collected for RNAseq, and cells were fixed and stained for tight junction marker (Zonula Occludens-1, ZO-1) via ICC. Our study found that treatment to smoldering eucalyptus particles can increase inflammatory cytokine production dose-dependently in HBMECs and hCMEC/D3. Moreover, RNAseq analyses resulted in dose-dependent changes in HBMEC and hCMEC/D3 from wood smoke treatment that could be mediated via AhR and Nrf2 pathways.
2024-10-02 | GSE271935 | GEO
Project description:This study tested the hypothesis that a medicinal plant, Vasaka, typically consumed as a tea to treat respiratory malaise, could protect airway epithelial cells (AECs) from wood smoke particle-induced damage and prevent pathological mucus expression. Wood/biomass smoke is a common pneumotoxic air pollutant that activates transient receptor potential ankyrin 1 (TRPA1) and causes endoplasmic reticulum (ER) stress and AEC damage. This stimulates epidermal growth factor receptor and mucin 5AC (MUC5AC) production by AECs. Mucus normally protects the airways, but excessive MUC5AC production can obstruct airflow and cause respiratory distress. Vasaka tea pre- and co-treatment dose-dependently inhibited MUC5AC mRNA induction in cells treated with wood smoke particles. This correlated with TRPA1 inhibition, an attenuation of ER stress, and AEC damage/death, among other effects. Induction of mRNA for Anterior Gradient 2 (AGR2), an ER chaperone/disulfide isomerase required for MUC5AC production, and TRP vanilloid-3 (TRPV3), a gene that suppresses ER stress and wood smoke particle-induced cell death, were also attenuated. Variable inhibition of TRPA1, ER stress, and MUC5AC mRNA induction was observed using selected chemicals identified in Vasaka tea including vasicine, vasicinone, apigenin, 9-oxoODE, and 9,10-EpOME. 9,10-EpOME and apigenin were the most cytoprotective and mucosuppressive. Cytochrome P450 1A1 mRNA was also induced by Vasaka tea and wood smoke particles. Inhibition of CYP1A1 enhanced ER stress and MUC5AC mRNA expression, suggesting a role in producing protective oxylipins in stressed cells. The results provide mechanistic insights and support for the purported benefits of Vasaka tea in treating lung inflammatory conditions, raising the possibility of further development as a preventative therapy.
2023-07-05 | GSE232172 | GEO
Project description:This SuperSeries is composed of the following subset Series: GSE15857: The Aryl Hydrocarbon Receptor Regulates Tissue-Specific Dioxin-Dependent and Dioxin-Independent Gene Batteries: Kidney GSE15858: The Aryl Hydrocarbon Receptor Regulates Tissue-Specific Dioxin-Dependent and Dioxin-Independent Gene Batteries: Liver Refer to individual Series
2010-05-05 | E-GEOD-15859 | biostudies-arrayexpress