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Endothelial to Mesenchymal Transition compromises vascular integrity to induce hypoxia and Myc mediated metabolic reprogramming of tubular epithelial cells in kidney fibrosis

ABSTRACT: Endothelial to Mesenchymal Transition compromises vascular integrity to induce hypoxia and Myc mediated metabolic reprogramming of tubular epithelial cells in kidney fibrosis

PROVIDER: PRJNA604610 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11007200_1.fastq.gz	Fastqsanger.gz
	SRR11007200_2.fastq.gz	Fastqsanger.gz
	SRR11007201_1.fastq.gz	Fastqsanger.gz
	SRR11007201_2.fastq.gz	Fastqsanger.gz
	SRR11007202_1.fastq.gz	Fastqsanger.gz

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Endothelial to Mesenchymal Transition compromises vascular integrity to induce hypoxia and Myc mediated metabolic reprogramming of tubular epithelial cells in kidney fibrosis

Project description:The aim of this study was to identify the functional impact of Endothelial-to-Mesenchymal Transition (EndMT) in kidney fibrosis. For this purpose EndMT has been conditionally deleted in endothelial cells by the genetic deletion of Twist and Snail in the endothelial cells, using the tamoxifen inducible Cdh5-ERT2 Cre model. Twist EndMT–cKO and Snail EndMT–cKO mice, together with WT mice, were challanged with the unilateral ureteral obstruction model (UUO) to induce kidney fibrosis. Mice were euthanized 10 days after surgery. In addition, since we found that EndMT-induced vascular damage and hypoxia induces Myc upregulation in tubular epithelial cells (TECs), we deleted Myc in TECs (using the GGT-Cre model). Myc GGT–cKO mice were also challenged with the UUO model and euthanized 10 days after surgery.

2020-06-09 | GSE144701 | GEO

Endothelial-to-mesenchymal transition compromises vascular integrity to induce Myc-mediated metabolic reprogramming in kidney fibrosis.

Project description:Endothelial-to-mesenchymal transition (EndMT) is a cellular transdifferentiation program in which endothelial cells partially lose their endothelial identity and acquire mesenchymal-like features. Renal capillary endothelial cells can undergo EndMT in association with persistent damage of the renal parenchyma. The functional consequence(s) of EndMT in kidney fibrosis remains unexplored. Here, we studied the effect of Twist or Snail deficiency in endothelial cells on EndMT in kidney fibrosis. Conditional deletion of Twist1 (which encodes Twist) or Snai1 (which encodes Snail) in VE-cadherin+ or Tie1+ endothelial cells inhibited the emergence of EndMT and improved kidney fibrosis in two different kidney injury/fibrosis mouse models. Suppression of EndMT limited peritubular vascular leakage, reduced tissue hypoxia, and preserved tubular epithelial health and function. Hypoxia, which was exacerbated by EndMT, resulted in increased Myc abundance in tubular epithelial cells, enhanced glycolysis, and suppression of fatty acid oxidation. Pharmacological suppression or epithelial-specific genetic ablation of Myc in tubular epithelial cells ameliorated fibrosis and restored renal parenchymal function and metabolic homeostasis. Together, these findings demonstrate a functional role for EndMT in the response to kidney capillary endothelial injury and highlight the contribution of endothelial-epithelial cross-talk in the development of kidney fibrosis with a potential for therapeutic intervention.

| S-EPMC7790440 | biostudies-literature

Excessive Plasmin Compromises Hepatic Sinusoidal Vascular Integrity After Acetaminophen Overdose.

Project description:The serine protease plasmin degrades extracellular matrix (ECM) components both directly and indirectly through activation of matrix metalloproteinases. Excessive plasmin activity and subsequent ECM degradation cause hepatic sinusoidal fragility and hemorrhage in developing embryos. We report here that excessive plasmin activity in a murine acetaminophen (APAP) overdose model likewise compromises hepatic sinusoidal vascular integrity in adult animals. We found that hepatic plasmin activity is up-regulated significantly at 6 hours after APAP overdose. This plasmin up-regulation precedes both degradation of the ECM component fibronectin around liver vasculature and bleeding from centrilobular sinusoids. Importantly, administration of the pharmacological plasmin inhibitor tranexamic acid or genetic reduction of plasminogen, the circulating zymogen of plasmin, ameliorates APAP-induced hepatic fibronectin degradation and sinusoidal bleeding. Conclusion: These studies demonstrate that reduction of plasmin stabilizes hepatic sinusoidal vascular integrity after APAP overdose. (Hepatology 2018; 00:1-13).

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Hypoxia inducible factor prolyl hydroxylase inhibition compromises development and progression of acute myeloid leukaemia

Project description:Acute myeloid leukaemia (AML) is a largely incurable haematological disease, for which new efficient therapeutic strategies are urgently needed. While leukaemogenesis occurs under hypoxic conditions of the bone marrow, the therapeutic tractability of the hypoxia inducible factor (HIF) system in AML is elusive. Given that inactivation of HIF-1α and HIF-2α promotes leukaemic transformation, a possible therapeutic strategy for AML treatment is to constitutively stabilise HIF- α proteins. This can be achieved by targeting the HIF-prolyl hydroxylases (PHDs), the catalysis of which promotes HIF-1α and HIF-2α degradation. Here, we demonstrate that genetic inactivation of Phd1 or Phd2 compromises initiation and progression of AML, without impacting normal haematopoiesis, thus implying the immense therapeutic potential of targeting PHDs in AML. To pharmacologically inactivate PHDs, we employed clinical grade PHD inhibitors as well as a new selective PHD inhibitor (IOX5), which stabilises HIF-α through a novel mechanism of action. Pharmacological PHD inhibition compromises AML cells in a HIF-α dependent manner to disable pro-leukaemogenic pathways in AML cells, re-program their metabolism, and induce cell death, at least in part via pro-apoptotic BNIP3. Importantly, concurrent inhibition of anti-apoptotic BCL-2 by clinically used Venetoclax potentiates the anti-leukaemic effect of PHD inhibition. Thus PHD inhibition with consequent HIF-α stabilisation is a promising new non-toxic strategy for AML treatment.

2024-02-14 | GSE232644 | GEO

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Electric Tubular Anastomosis in Rectal Cancer

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| 61578 | ecrin-mdr-crc

The Role of SOX9 in hypoxia/reoxygenation (H/R) injuried mice primary renal tubular epithelial cells

Project description:The Role of SOX9 in hypoxia/reoxygenation (H/R) injuried mice primary renal tubular epithelial cells Purpose: we performed comparative RNA-seq analyses to identify differentially expressed genes between Knockdown of Sox9 and negtive control in hypoxia/reoxygenation (H/R) injuried mice primary renal tubular epithelial cells. Methods:we grew mouse primary renal tubular epithelial cells to approximately 50% confluence, transfected using EndoFectin™ Max (GeneCopoeia, China) 12h before suffering to H/R injury. H/R was used to mimic IRI in vitro. Briefly, cells were incubated in glucose-free medium in a tri-gas incubator (94% N2, 5% CO2 and 1.0% O2) at 37 °C for 6 hours. Subsequently, cells were incubated in complete medium under normal conditions for 18 hours for reoxygenation. Cells were then collected by 1ml TRIzol (Invitrogen, Carlsbad), and sent to Annoroad Corporation (Beijing, China) for high throughout Illumina NovaSeq 6000 sequencing (GPL24247) (Illumina, San Diego, CA, USA). Results: To determine the possible pathways of Sox9 in protecting mice primary renal tubular epithelial cells from injury, we conduct the transcriptomotic sequencing. After sequence, the clean reads rate of all samples were ≥98%.The quality of the assembled transcriptome is good enough for functional annotation and further analysis. Conclusions: We performed RNA-sequencing (RNA-Seq) on isolated mouse renal tubular epithelial cells of two groups, treated with H/R and transfected with siNC (H/R+siNC group) or siSox9 (H/R+siSox9 group). SOX9-responsive genes showed significant enrichment of the WNT signaling pathway in primary tubular epithelial cells.

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Expression data from proximal tubular cells of proximal tubular cell-specific KAT5 knockout mice

Project description:Isolated proximal tubular cells from proximal tubular cell-specific KAT5 knockout mice for RNA extraction and hybridization on Affymetrix microarrays. We sought to obtain the physiological significance of KAT5 in proximal tubular cells.

2021-11-19 | GSE168535 | GEO

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