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Glucocorticoids induce a maladaptive epithelial stress response to aggravate acute kidney injury [ATAC]

ABSTRACT: Glucocorticoids induce a maladaptive epithelial stress response to aggravate acute kidney injury [ATAC]

PROVIDER: PRJNA1154561 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR30484400_1.fastq.gz	Fastqsanger.gz
	SRR30484400_2.fastq.gz	Fastqsanger.gz
	SRR30484401_1.fastq.gz	Fastqsanger.gz
	SRR30484401_2.fastq.gz	Fastqsanger.gz
	SRR30484402_1.fastq.gz	Fastqsanger.gz

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Glucocorticoids induce a maladaptive epithelial stress response to aggravate acute kidney injury

Project description:Glucocorticoids induce a maladaptive epithelial stress response to aggravate acute kidney injury

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Glucocorticoids induce a maladaptive epithelial stress response to aggravate acute kidney injury [RNA]

Project description:Glucocorticoids induce a maladaptive epithelial stress response to aggravate acute kidney injury [RNA]

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Glucocorticoids induce a maladaptive epithelial stress response to aggravate acute kidney injury [RNA]

Project description:Acute kidney injury (AKI) is a frequent and challenging clinical condition associated with high morbidity and mortality. In AKI, renal tubular epithelial cells (TECs) are a primary site of damage, and recovery from AKI depends on TEC plasticity. However, the molecular mechanisms underlying adaptation and maladaptation of TECs in AKI remain largely unclear. Here, our analyses of mouse kidney tubuloids showed that TEC injury resulted in activation of the glucocortiocoid receptor by endogenous glucocorticoids, which aggravated tubular damage. The detrimental effect of endogenous glucocorticoids on injured TECs was exacerbated by the administration of the widely clinically used synthetic glucocorticoid, dexamethasone, as indicated by experiments in mouse kidney tubuloids. Mechanistically, studies in mouse tubuloids demonstrated that glucocorticoid receptor signaling in injured TECs orchestrated a maladaptive transcriptional program to hinder DNA repair and to amplify injury-induced DNA double-strand break formation, as well as to dampen mTOR activity and mitochondrial bioenergetics. This study identifies glucocortiocoid receptor activation as a mechanism of epithelial maladaptation, which is functionally important for acute kidney injury.

2024-09-14 | GSE276040 | GEO

Glucocorticoids induce a maladaptive epithelial stress response to aggravate acute kidney injury [ATAC]

2024-09-14 | GSE276041 | GEO

Glucocorticoids induce a maladaptive epithelial stress response to aggravate acute kidney injury

Project description:This SuperSeries is composed of the SubSeries listed below.

2024-09-14 | GSE276043 | GEO

Lineage tracing and single nuclear multiomics reveal novel features of adaptive and maladaptive repair after acute kidney injury

Project description:We combined lineage tracing of cycling (Ki67+) cells with single nuclear multiomics (single nucleus RNA-seq + single nucleus ATAC-seq) to characterize the long-term (4 weeks and 6 months) outcome of cells that initiate proliferation early after acute kidney injury (AKI). The data document a broad proliferative response to injury in epithelial and non-epithelial kidney cell types, identify novel transcription factors governing the adaptive and maladaptive proximal tubule cell state and highlight the importance of enhancer dynamics in determining cell states. Comparison of lineage traced with control proximal tubule cells reveals long-term effects of AKI on proximal tubule cells, even following adaptive repair.

2022-11-22 | GSE209610 | GEO

Immunohistochemical Investigation for Renal Tubules in Adaptive and Maladaptive Repair Process after Renal Tubular Injury in the Kidney of Rats

Project description:Acute kidney injury (AKI) have been thought to be reversible condition, however, emerging evidence demonstrated association between AKI and subsequent development of irreversible fibrosis and chronic kidney disease. In the present study, since recovery of AKI depends on renal tubular regeneration, factors expressing in renal tubules in adaptive or maladaptive repair process were investigated to predict reversibility of kidney injury. In the kidney of female F344 rats subjected to ischemia/reperfusion (I/R), regenerative tubules and dilated tubules were observed at 3 and 7 days after I/R. In fibrotic areas of the kidney of male SD rats subjected to I/R, renal tubules were dilated or atrophied. From microarray data of regenerative tubules, survivin, sex-determining region Y (SRY)-box 9 (SOX9), and CD44 were extracted as factors possibly relating to tubular regeneration or fibrosis. Immunohistochmical analysis demonstrated that survivin and SOX9 expressed in regenerative tubules, while SOX9 also expressed in renal tubules in fibrotic area, indicating that survivin and SOX9 contribute renal tubular regeneration, but sustained SOX9 expression may lead fibrosis. CD44 expressed in dilated tubules at day 3 and 7, and tubules in fibrotic area, suggesting that CD44 expressed in maladaptive tubules. These information will be helpful to consider reversibility of kidney injury.

2020-06-01 | GSE148420 | GEO

HIF-1synergizes with glucocorticoids to promote BFU-E progenitor self-renewal

Project description:With the aim of finding small molecules that stimulate erythropoiesis earlier than erythropoietin and that enhance CFU-E production, we studied the mechanism by which glucocorticoids increase CFU-E formation. Using BFU-E and CFU-E progenitors purified by a new technique, we demonstrate that glucocorticoids stimulate the earliest (BFU-E) progenitors to undergo limited self-renewal, which increases formation of CFU-E cells > 20-fold. Interestingly, glucocorticoids induce expression of genes in BFU-E cells that contain promoter regions highly enriched for hypoxia-induced factor 1 alpha (HIF1a) binding sites. This suggests activation of HIF1a may enhance or replace the effect of glucocorticoids on BFU-E self-renewal. Indeed, HIF1a activation by a prolyl hydroxylase inhibitor (PHI) synergizes with glucocorticoids and enhances production of CFU-Es 170-fold. Since PHIs are able to increase erythroblast production at very low concentrations of glucocorticoids, PHI-induced stimulation of BFU-E progenitors thus represents a conceptually new therapeutic window for treating Epo-resistant anemia. RNA-Seq was performed on enriched populations of BFU-E, CFU-E and Ter119+ as well as BFU-E enriched cells treated with Dex and DMOG

2010-12-21 | E-GEOD-26086 | biostudies-arrayexpress

Induction of natural IgE by glucocorticoids

Project description:Allergy is one of the most prevalent chronic diseases, affecting hundreds of millions of people worldwide. In allergy, environmental allergens induce B cells to undergo class switch recombination and produce Immunoglobulin E (IgE) antibodies. IgE is a key molecule that mediates allergic responses by coating mast cell or basophil surfaces and inducing degranulation upon binding a specific allergen. IgE can also be spontaneously produced in the absence of exogenous allergens, yet the origin, regulation, and functions of such “natural” IgE still remains largely unknown. Here, we discovered that glucocorticoids, which are steroid stress hormones, enhance IgE isotype class switching in B cells both in vivo and ex vivo without antigenic challenge. Such IgE class switching is promoted by B cell-intrinsic glucocorticoid receptor signaling that reinforces CD40 signaling and synergizes with the IL-4/STAT6 pathway. In addition, we found that rare B cells in the mesenteric lymph nodes are responsible for the production of glucocorticoid-inducible IgE. Furthermore, we showed that locally produced glucocorticoids in the gut may induce natural IgE during perturbations of gut homeostasis such as dysbiosis. Notably, mice preemptively treated with glucocorticoids were protected from subsequent IgE-mediated pathogenic anaphylaxis in vivo. Together, our results suggest that glucocorticoids, classically considered to be broadly immunosuppressive, have a selective immunostimulatory role in B cells.

2022-09-09 | GSE203542 | GEO

Single cell RNA-seq analyses of kidney repair and how maladaptive repair leads to kidney atrophy following ischemia/reperfusion injury

Project description:To better understand the pathogenesis of AKI-to-CKD transition and specifically the mechanism of kidney atrophy, we compared the kidney response to an identical time of ischemic injury between mice subjected to unilateral ischemia/reperfusion (U-IRI) to induce atrophy and those subjected to unilateral IRI with contralateral nephrectomy (IRI/CL-NX) to induce adaptive repair. We performed single cell RNA-sequencing (scRNA-seq) analyses on day 14 after injury to identify major cell types in the kidney and the differential transcriptional response between the models in each cell type.

2021-02-03 | GSE161758 | GEO

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