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Identification of Sox9-Regulated Pathways During the Secondary Transition Stage of Pancreas Development

ABSTRACT: Sox9 target genes were identified during the secondary transition stage of pancreas development by comparing gene expression in Sox9-ablated versus wild-type pancreata using microarray analysis.

ORGANISM(S): Mus musculus

PROVIDER: GSE28670 | GEO | 2012/08/02

SECONDARY ACCESSION(S): PRJNA143073

REPOSITORIES: GEO

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Identification of Sox9-Regulated Pathways During the Secondary Transition Stage of Pancreas Development

Project description:Sox9 target genes were identified during the secondary transition stage of pancreas development by comparing gene expression in Sox9-ablated versus wild-type pancreata using microarray analysis. Sox9 was conditionally ablated during the secondary transition in the developing pancreas via recombination of a Sox9-flox allele (Kist et al., 2002) using the tamoxifen-inducible Rosa26-CreER allele (Vooijs et al., 2001). Dams were injected with 6 mg/40 g tamoxifen in corn oil at e12.5. Pancreata were manually microdissected at e15.5. Total RNA was isolated and pooled from pancreata of e15.5 Sox9fl/fl; Rosa26-CreER (mutant) versus Rosa26-CreER (wild-type) littermates for four biological replicates.

2012-08-01 | E-GEOD-28670 | biostudies-arrayexpress

Identification of Sox9-Regulated Pathways During Early Pancreas Organogenesis

Project description:Sox9 target genes were identified by comparing gene expression in Sox9-ablated versus wild-type pancreata using microarray analysis. Sox9 was conditionally ablated in the developing pancreas via recombination of a Sox9-flox allele (Kist et al., 2002) using the Pdx1-Cre transgene (Gu et al., 2002). Total RNA was isolated and pooled from dorsal pancreatic epithelia of e12.5 Sox9fl/fl; Pdx1-Cre (mutant) versus Sox9fl/fl (wild-type) littermates for three biological replicates.

2012-08-01 | E-GEOD-28669 | biostudies-arrayexpress

Identification of Sox9-Regulated Pathways During Early Pancreas Organogenesis

Project description:Sox9 target genes were identified by comparing gene expression in Sox9-ablated versus wild-type pancreata using microarray analysis.

2012-08-02 | GSE28669 | GEO

Identification of Sox9/Pdx1-coregulated Genes During Pancreas Organogenesis

Project description:Sox9/Pdx1 co-regulated target genes were identified by comparing gene expression in Sox9/Pdx1-double heterozygates versus Sox9- or Pdx1- heterozygates pancreata using microarray analysis. Pdx1LacZko (herein designated Pdx1-/+) (Offield et al. 1996) and one Sox9 allele was conditionally deleted in the developing pancreas via recombination of a Sox9-flox allele (Kist et al., 2002) using the Foxa3-Cre transgene (Lee et al., 2005). Total RNA was isolated and pooled from dorsal pancreatic epithelia of e12.5 Sox9fl/+; Foxa3-Cre (Sox9 het), Pdx1-/+ (Pdx1 het) versus Sox9fl/+; Foxa3-Cre; Pdx1-/+ (Sox9/Pdx1 double hets) littermates for three biological replicates

2015-08-07 | E-GEOD-62023 | biostudies-arrayexpress

Identification of Sox9-Regulated Pathways During Pancreas Development

Project description:This SuperSeries is composed of the following subset Series: GSE28669: Identification of Sox9-Regulated Pathways During Early Pancreas Organogenesis GSE28670: Identification of Sox9-Regulated Pathways During the Secondary Transition Stage of Pancreas Development Refer to individual Series

2012-08-01 | E-GEOD-28671 | biostudies-arrayexpress

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Expression data of Sox9+ and Ngn3+ mouse pancreas cells at different stages of development

Project description:Genes specific to Sox9+ pancreatic progenitors were identified by comparing the gene expression in embryonic and adult Sox9+ cells. We used microarray analysis to detail the global changes in gene expression as Sox9 positive embryonic pancreatic progenitors differentiatiate into adult ductal cells or the endocrine lineage. GFP positive cells from Sox9-EGFP mouse pancreas were isolated by FACS at different stages of development (e10.5, e15.5, and p23) for RNA extraction and hybridization to Affymetrix microarrays. To obtain populations highly enriched in Sox9 expression, we collected only GFP Hi populations for analysis. To identify gene expression changes specific to the differentiation of progenitors to ductal cells or endocrine cells, we also isolated and analyzed the gene expression profile of GFP negative cells isolated at p23, as well as GFP positive cells isolated from Ngn3-EGFP mouse pancreas at e15.5. These two populations allow the identification of genes whose expression is associated with the newly differentiated endocrine progeny in the embryo (Ngn3-GFP positive) and adult acinar and endocrine cells at p23.

2012-08-01 | E-GEOD-34060 | biostudies-arrayexpress

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Project description:Pancreata of wild type and a neuronatin deficient mouse strain were homogenised and the peptidome characterised. Particular attention was paid to the processing of insulin, to assess if neuronatin deficiency causes changes in the processing efficiency of insulin and other bioactive peptides produced in the pancreas

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SOX9+/PTF1A+ Cells Define the Tip Progenitor Cells of the Human Fetal Pancreas of the Second Trimester

Project description:Significant progress has been made in recent years in characterizing human multipotent progenitor cells (hMPCs) of the early pancreas; however, the identity and persistence of these cells during the second trimester, after the initiation of branching morphogenesis, remain elusive. Additionally, studies on hMPCs have been hindered by few isolation methods that allow for the recovery of live cells. Here, we investigated the tip progenitor domain in the branched epithelium of human fetal pancreas between 13.5 and 17.5 gestational weeks by immunohistological staining. We also used a novel RNA‐based technology to isolate live cells followed by gene expression analyses. We identified cells co‐expressing SOX9 and PTF1A, two transcription factors known to be important for pancreatic MPCs, within the tips of the epithelium and observed a decrease in their proportions over time. Pancreatic SOX9+/PTF1A+ cells were enriched for MPC markers, including MYC and GATA6. These cells were proliferative and appeared active in branching morphogenesis and matrix remodeling, as evidenced by gene set enrichment analysis. We identified a hub of genes pertaining to the expanding tip progenitor niche, such as FOXF1, GLI3, TBX3, FGFR1, TGFBR2, ITGAV, ITGA2, and ITGB3. YAP1 of the Hippo pathway emerged as a highly enriched component within the SOX9+/PTF1A+ cells. Single‐cell RNA‐sequencing further corroborated the findings by identifying a cluster of SOX9+/PTF1A+ cells with multipotent characteristics. Based on these results, we propose that the SOX9+/PTF1A+ cells in the human pancreas are uncommitted MPC‐like cells that reside at the tips of the expanding pancreatic epithelium, directing self‐renewal and inducing pancreatic organogenesis.

2019-11-27 | GSE141087 | GEO

Comparison of Hox6 mutant and control E12.5 mouse pancreas

Project description:Hox genes are critical developmental transcription factor. We found that in mice with disrupted expression of Hoxa6, Hoxb6 and Hoxc6 there is significantly disrupted endocrine pancreas development. We used microarray analysis to probe for possible molecular mechanisms involed in Hox6 signaling in pancreas development. We dissected pancreata from E12.5 control and Hox6 null embryos and extracted total RNA.

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