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Transcriptomic Changes in Microdissected CCDs after Three Hours Lipopolysaccharide (LPS) Administration in Rats

ABSTRACT: Ureteral obstruction is marked by disappearance of the vasopressin-dependent water channel aquaporin-2 (AQP2) in the renal collecting duct and polyuria upon reversal. Most studies of unilateral ureteral obstruction (UUO) models have examined late time points, obscuring the early signals that trigger loss of AQP2. Here, we performed RNA-Seq on microdissected rat cortical collecting ducts (CCDs) to identify early signaling pathways post-UUO. To address whether the induction of inflammatory signaling is a cause of loss of AQP2 expression, we directly induced inflammatory signaling in rats with lipopolysaccharide (LPS) administration

ORGANISM(S): Rattus norvegicus

PROVIDER: GSE200928 | GEO | 2022/07/20

REPOSITORIES: GEO

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Early molecular events mediating loss of aquaporin-2 in kidney collecting duct during ureteral obstruction

Project description:Early stages of ureteral obstruction are marked by polyuria with impaired urinary concentrating ability, associated with loss of aquaporin-2 (AQP2) expression. Most mechanistic work in unilateral ureteral obstruction (UUO) models has been done at relatively late time points, making it difficult to discriminate the early effect on collecting ducts (CDs) in gene expression. Here, we use single-tubule RNA-Seq to identity signaling pathways at earlier time points after UUO in rat models.

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2018-01-02 | GSE95007 | GEO

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2018-03-26 | GSE108786 | GEO

Expression data from mouse collecting duct cell, mpkCCD, in response to a peptide hormone vasopressin analog, dDAVP

2010-12-09 | GSE19938 | GEO

Expression data from mouse collecting duct cell, mpkCCD, in response to a peptide hormone vasopressin analog, dDAVP

Project description:Vasopressin is the major hormone that regulates renal water excretion. It does so by binding to a receptor in renal collecting duct cells, triggering signaling pathways that ultimately regulate the abundance, location, and activity of the water channel protein aquaporin 2. We took an advantage of quantitative large scale proteomic technologies and oligonucleotide microarrays to quantify steady state changes in protein and transcript abundances in response to vasopressin in a collecting duct cell line, mpkCCD clone 11 (Yu et al. PNAS 2009, 106:2441-2446). This cell line originally developed by Alan Vandewalle’s group recapitulates vasopressin-mediated AQP2 expression and phosphorylation as seen in native colleting duct cells. The mpkCCD cells were grown on membrane supports to permit polarization. Once transepithelial resistance reached 5kohm per centimeter square and higher, the cells were exposed to the vasopressin V2 receptor analog, dDAVP, at a physiological concentration, 0.1nM, for 5 days. Control experiments were done with cells exposed to vehicle alone. Total RNA was harvested and processed for transcript expression analysis using Affymetrix GeneChip Mouse Genome 430 2.0 Arrays. Each experimental treatment, vehicle and dDAVP, was repeated 3 times.

2010-12-09 | E-GEOD-19938 | biostudies-arrayexpress

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2022-07-23 | PXD033859 | Pride

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2022-07-23 | PXD033852 | Pride

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Project description:This series of microarray data contain transcript intensity of mpkCCD cells. Experiment Overall Design: The mpkCCDc14 cells were cloned into colonies with varying aquaporin 2 (AQP2) expression levels in the presence of vasopressin analogy dDAVP. Transcript profiling was done for the original cells and cell clones 2, 3, 9, 10, and 11. By studying transcripts that correlate with AQP2 mRNA levels among cell clones, the objective was to identify transcripts responsible for cell-specific expression of AQP2.

2009-01-31 | E-GEOD-13667 | biostudies-arrayexpress

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