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Comparative gene expression of mouse Pancreatic specific transcription factor 1a (Ptf1a/p48) in pancreatic progenitor cells

ABSTRACT: Ptf1a was identified as the essential transcription factor which controls pancreatic exocrine enzyme expression. With lineage tracing eperiments Ptf1a was recognized as an important pancreatic progenitor transcription factor and Ptf1a null mice do not develop a pancreas. We used gene expression arrays to determine the global differeences in expression levels when pancreatic progenitor cells are expanding in Ptf1a heterozygote versus null mutants at E10.5.

ORGANISM(S): Mus musculus

PROVIDER: GSE26816 | GEO | 2011/01/24

SECONDARY ACCESSION(S): PRJNA136011

REPOSITORIES: GEO

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Comparative gene expression of mouse Pancreatic specific transcription factor 1a (Ptf1a/p48) in pancreatic progenitor cells

Project description:Ptf1a was identified as the essential transcription factor which controls pancreatic exocrine enzyme expression. With lineage tracing eperiments Ptf1a was recognized as an important pancreatic progenitor transcription factor and Ptf1a null mice do not develop a pancreas. We used gene expression arrays to determine the global differeences in expression levels when pancreatic progenitor cells are expanding in Ptf1a heterozygote versus null mutants at E10.5. Ptf1a E10.5 dorsal pancreas total RNA from pools of 3 embryos was twice linear amplified and hybridized to Affymetrix GeneChip Mouse Genome 430 2.0 in triplicate for the Ptf1a KO and in duplicate for the Ptf1a heterozygote

2011-01-24 | E-GEOD-26816 | biostudies-arrayexpress

RNA-Seq of mouse genotypes Ptf1a^YFP/+ and Ptf1a^YFP/YFP

Project description:This experiment used RNA-Seq technology to explore gene expression in mouse Ptf1a^YFP/+ [het] FACS sorted cells at E11.5 (early pancreatic Multipotent Progenitor Cells) and E15.5 (nascent acinar cells) as well as in Ptf1a^YFP/YFP [null] at E11.5 (delayed early MPC). 376 selected genes identified as differentially expressed between early pancreatic MPC and nascent acinar cells or between early pancreatic and delayed early MPCs have then been examined by Taqman Low Density Arrays (TLDAs) with Real Time RT-PCR for each 1-day time point from E10.5 to E15. 5 in Ptf1a^YFP/+ [het] and for E10.5 and E11.5 in Ptf1aYFP/YFP [null] . Finally, 94 genes identified in the first phase of TLDAs (including 2 endogenous control, Gapdh and 18S) were analyzed in a second TLDA phase for each 1-day time point from E10.5 to -E18.5 in Ptf1a^YFP/+ [het] and for E11.5 in Ptf1aYFP/YFP [null] with biological replicates (n>=3) for each time point.

2014-11-15 | E-MTAB-449 | biostudies-arrayexpress

Ptf1a-dependent gene expression during pancreas development (TLDA part)

Project description:We first used RNA-Seq technology to explore gene expression in mouse Ptf1a^YFP/+ [het] FACS sorted cells at E11.5 (early pancreatic Multipotent Progenitor Cells) and E15.5 (nascent acinar cells) as well as in Ptf1a^YFP/YFP [null] at E11.5 (delayed early MPC): this is deposited with accession number E-MTAB-449. We then examined 376 selected genes identified as differentially expressed between early pancreatic MPC and nascent acinar cells or between early pancreatic and delayed early MPCs by Taqman Low Density Arrays (TLDAs) with Real Time RT-PCR for each 1-day time point from E10.5 to E15. 5 in Ptf1a^YFP/+ [het] and for E10.5 and E11.5 in Ptf1aYFP/YFP [null] . Finally, 94 genes identified in the first phase of TLDAs (including 2 endogenous control, Gapdh and 18S) were analyzed in a second TLDA phase for each 1-day time point from E10.5 to -E18.5 in Ptf1a^YFP/+ [het] and for E11.5 in Ptf1aYFP/YFP [null] with biological replicates (n>=3) for each time point.

2014-11-15 | E-MTAB-2780 | biostudies-arrayexpress

Ptf1a binding sites in a pancreatic cell line which mimics embryonic day E10.5 pancreas progenitors.

Project description:Pancreatic specific transcription factor1a (Ptf1a) immunoprecipitated chromatin from 266.6 cells produced 26 million tags with the Illumina high throughput sequencing technology. Many of the mapped tags were genes which were found to be differentially expressed at E10.5 in the microarray experiments comparing Ptf1a heterozygotes versus null mutant mice (study GSE26816). As Ptf1a is a bHLH transcription factor, it recognizes an E Box on the chromatin CANNTG. Since it belongs to a transcription factor complex, one of which recognizes the binding site TGGGAA, we also found this sequence one, two or three helical turns of DNA away from the E-box where peaks were detected. Ptf1a chromatin immunoprecipitation of cross-linked pancreatic cells, 266.6, to compare with the expressed genes in Ptf1a +/- vs -/- E10.5 pancreatic dorsal buds.

2013-02-14 | E-GEOD-27295 | biostudies-arrayexpress

Ptf1a binding sites in a pancreatic cell line which mimics embryonic day E10.5 pancreas progenitors.

2013-02-14 | GSE27295 | GEO

Pancreatic tissue of 9 week old mice with genotypes Ptf1a-Cre;LSL-KrasG12D and Ptf1a-Cre;LSL-KrasG12D;Ptpn11fl/fl

Project description:To investigate the role of SHP2 (Ptpn11) in pancreatic carcinogenesis, murine pancreatic whole tissue RNA samples of 9 week old mice with the genotypes Ptf1a-Cre;LSL-KrasG12D (ID-labels Kxxx) and Ptf1a-Cre;LSL-KrasG12D;Ptpn11fl/fl (ID-labels Mxxxx) were analyzed by microarray.

2018-03-30 | E-MTAB-6399 | biostudies-arrayexpress

Transcription profiling of pancreatic buds from wild type and Ipf1/Pdx1 knock-out mouse embryos

Project description:Identification of genes regulated by IPF1/PDX1 in early pancreatic progenitor cells, analysis of Ipf1/Pdx1 global null mutants e10.5 embryonic pancreatic buds compared to wt

2008-02-12 | E-MEXP-1047 | biostudies-arrayexpress

Transcriptional Maintenance of Pancreatic Acinar Identity, Differentiation and Homeostasis by PTF1A [6-day RNA-Seq]

Project description:RNA-seq analysis documented mRNA changes in total pancreatic RNA preparations 6 days after Ptf1a inactivation.

2016-09-01 | GSE86261 | GEO

Induced MIST1 and PTF1a Expression in Pancreatic Ductal Adenocarcinoma Cells

Project description:Purpose: The goal of the study was to determine the effects of forced expression of the acinar transcription factors MIST1 and PTF1a in PDAC cells. Methods: Doxycycline inducible MIST1myc and PTF1amyc Panc-1 cells were generated using Clontech's Tetone System and subjected to RNA-Sequencing following doxycycline treatment. Results: 50 million sequence reads were mapped to the human genome. Data suggests acinar associated molecules were induced upon doxycyline treatment. Conclusions: MIST1 and PTF1a retain functional activity and can promote acinar gene expression in the context of pancreatic cancer cells.

2018-10-27 | GSE106290 | GEO

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

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