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Transcription profiling of rat kidney progenitor tissue from embryo at E13

ABSTRACT: In this study we compared genes expressed in the unbudded portion of the Wolffian duct with the isolated ureteric bud to find genes novel to early kidney development. We used the Affymetrix Rat Genome 230 2.0 Array to compare the unbudded tissues with the budded samples. We used microarrays to find novel genes regulating early kidney formation. Experiment Overall Design: Isolated ureteric buds (UB) were separated from the embryonic kidney after a light trypsinization step. Approximately 100 UBs were pooled together into each replicate. Approximately 100 isolated Wolffian ducts were dissected from E13 rat embryoes and pooled into each sample. Approximately 50 Wolffian ducts with attached mesodermal cells were pooled into each replicate.

ORGANISM(S): Rattus norvegicus

SUBMITTER: Yohan Choi

PROVIDER: E-GEOD-18260 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Neuropeptide Y functions as a facilitator of GDNF-induced budding of the Wolffian duct.

Choi Yohan Y Tee James B JB Gallegos Thomas F TF Shah Mita M MM Oishi Hideto H Sakurai Hiroyuki H Kitamura Shinji S Wu Wei W Bush Kevin T KT Nigam Sanjay K SK

Development (Cambridge, England) 20091201 24

Ureteric bud (UB) emergence from the Wolffian duct (WD), the initiating step in metanephric kidney morphogenesis, is dependent on GDNF; however, GDNF by itself is generally insufficient to induce robust budding of the isolated WD in culture. Thus, additional factors, presumably peptides or polypeptide growth factors, might be involved. Microarray data from in vivo budding and non-budding conditions were analyzed using non-negative matrix factorization followed by gene ontology filtering and netw ...[more]

PMID: 19934016

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Expression data for kidney progenitor tissue from rat embryo at E13

Project description:In this study we compared genes expressed in the unbudded portion of the Wolffian duct with the isolated ureteric bud to find genes novel to early kidney development. We used the Affymetrix Rat Genome 230 2.0 Array to compare the unbudded tissues with the budded samples. We used microarrays to find novel genes regulating early kidney formation.

2009-12-10 | GSE18260 | GEO

Expression data from embryonic rat kidney timepoints and a budded WD-MM recombination tissue

Project description:Here we compared the expression of an engineered kidney tissue, created by recombining an in vitro budded Wolffian duct with fresh E13 metanephric mesenchyme, with that of three in vivo rat embryonic kidney timepoints (E13, E18, and week 4) Keywords: time course

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RNA-SEQ analysis of various developing and adult kidney components.

Project description:We used micro-dissection techniques and/or FACS to isolate cell types from the developing and adult kidney (E11.5 ureteric buds, E12.5, P1 and P4 cap mesenchyme, E15.5 collecting ducts, proximal tubules, ureter, Adult renal proximal tubules, podocytes, endothelial and mesangial cells). RNA-SEQ analysis was performed to determine the transcriptional profile of each cell type, identify component specific transcripts and isoforms and cell-type specific long-noncoding RNAs. In addition the unbiased nature of RNA-SEQ will potentially identify novel transcripts that have not been annotated in the database. Total RNA is obtained from micro-dissected and/or FACS isolated embryonic and adult kidney components. The long term goal is to generate a transcriptional atlas of developing kidney.

2015-01-27 | E-GEOD-64959 | biostudies-arrayexpress

Distal nephron plasticity allows the induction of ureteric tip and stalk for the modelling of collecting duct disease

Project description:During development, distinct progenitors contribute to the nephrons versus the ureteric epithelium of the kidney. Indeed, previous pluripotent stem cell-derived models of kidney tissue either contain nephrons or pattern specifically to the ureteric epithelium. By reanalysing the transcriptional distinction between distal nephron and ureteric epithelium in human fetal kidney, we show here that while existing nephron-containing kidney organoids contain distal nephron epithelium and no ureteric epithelium, this distal nephron segment alone displays significant in vitro plasticity and can adopt a ureteric epithelial tip identity when isolated and cultured in defined conditions. “Induced” ureteric epithelium cultures can be cryopreserved, serially passaged without loss of identity and transitioned towards a collecting duct fate. Indeed, cultures harbouring loss-of-function mutations in PKHD1 recapitulate the cystic phenotype associated with autosomal recessive polycystic kidney disease.

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Transcriptional Profiling of the Metanephric Kidney

Project description:In this study we identify molecules with highly restricted expression patterns during the initial stages of metanephric development, when the ureteric bud has entered the metanephric mesenchyme and initiated branching morphogenesis. Using the Affymetrix Mouse Genome 430 2.0 Array, we compare gene expression patterns in ureteric bud tips, stalks and metanephric mesenchymes from mouse E12.5 embryos. To identify conserved molecular pathways, we also analyze transcriptional profiles in rat E13.5 ureteric buds and metanephric mesenchymes using the Affymetrix Rat Genome U34 Set. Taken together, these data sets help to identify conserved and highly localized transcripts in the metanephric kidney. Keywords = Mus musculus Keywords = Rattus norvegicus Keywords = metanephric mesenchyme Keywords = ureteric bud Keywords = ureteric bud tips Keywords = ureteric bud stalks Keywords = molecular screen for spatially restricted transcripts Keywords: other

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Transcription profiling of initial stages of metanephric development in mouse and rat

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Gene expression profile of zebrafish renal collecting ducts

Project description:The kidney is the main hematopoietic organ in teleost fish. Various stages of hematopoietic cells were observed in the interstitial tissue of the kidney. We recently demonstrated that zebrafish hematopoietic stem cells (HSCs) expressing jam1a were specifically localized along the renal collecting ducts in the adult kidney. Interestingly, most of HSCs invaded into the intracellular spaces of the epithelium in collecting ducts, suggesting that collecting ducts provide a specific microenvironment for HSCs. In order to identify niche factors in collecting ducts, we performed microarray analysis in collecting ducts isolated from the Tg(jam1a:EGFP) zebrafish kidney. Collecting ducts were isolated from Tg(jam1a:EGFP) zebrafish under a fluorescent microscope. To examine the effect of X-ray irradiation on the niche, collecting ducts were isolated from the fish irradiated with 25Gy. The whole kidney tissues were also used for a comparison analysis. Two independent replicates consisting of five zebrafish were prepared for each sample.

2012-08-24 | E-GEOD-32363 | biostudies-arrayexpress

Gene expression profile of zebrafish renal collecting ducts

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Transcription profiling of mouse knockouts for Etv4 and Etv5 - plusGDNF and minusGDNF comparison using U74Av2 and 430A arrays

Project description:GDNF signaling through the Ret receptor tyrosine kinase is critical for ureteric bud branching morphogenesis during kidney development yet few of the downstream genes are currently known. We find that the ETS transcription factors Etv4 and Etv5 are positively regulated by Ret signaling in ureteric bud tips. Etv4-/-Etv5+/- mice display either renal agenesis or severe hypodysplasia, while kidney development fails completely in double homozygotes. We identify several genes whose expression in the ureteric bud depends on Etv4 and Etv5, including Cxcr4, Myb, Met, Mmp14. Thus, Etv4 and Etv5 are key components of a gene network downstream of Ret that promotes and controls renal branching morphogenesis. Experiment Overall Design: 3 plus GDNF and 2 minus GDNF chips were analyzed with different pooled samples for each chip (U74Av2 and 430A). Sample comparisons and statistical analysis were performed using dChip 1.3, using the Comparison Analysis feature to identify genes differentially expressed between the two groups. The following filtering criteria were used: the “lower limit” for fold-change between the means of the +GDNF and -GDNF samples must exceed 1.2 with a 90% confidence limit, and the absolute difference between the two group means must exceed 100.

2009-10-02 | E-GEOD-18267 | biostudies-arrayexpress

Expression data from metanephric mesenchyme induced to convert into nephron epithelia

Project description:During kidney development segmented epithelia of the nephron derive from progenitor cells in the metanephric mesenchyme after induction by secreted molecules from the ureteric bud. We have identified three distinct inductive activities from a ureteric bud cell line. These include leukemia inhibitory factor (LIF), neutrophil gelatinase-associated lipocalin (NGAL) and an active fraction currently referred to as ANX. Each of these activities induces segmented nephron epithelia in isolated rat metanephric mesenchyme over a time period of 7 days. This study was designed to characterize the temporal sequence of gene expression in the course of the conversion process induced by each of the distinct inducers. Keywords: time course

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