Expression data from adult mouse islets
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE31961 | GEO | 2014/09/01
SECONDARY ACCESSION(S): PRJNA144989
REPOSITORIES: GEO
Similar Datasets
Project description:Zinc finger protein ZBTB20 plays a critical role in regulating insulin expression from islet beta-cells by orchestrating their gene expression profile. We used microarrays to investigate the target gene of ZBTB20 in mouse pancreatic beta-cells. Adult mouse islets were harvested for RNA extraction and hybridization on Affymetrix microarrays. We sought to identify the target genes of transcription factor ZBTB20 in beta-cells. To that end, we isolated the islets from adult beta cell-specific ZBTB20 knockout and their littermate control mice.
2014-09-01 | E-GEOD-31961 | biostudies-arrayexpress
Project description:Zinc finger protein ZBTB20 plays a critical role in mouse hippocampal development by orchestrating gene expression profile of hippocampal neurons. We used microarrays to investigate the target gene of ZBTB20 in mouse hippocampal development. Mouse hippocampi were harvested at postnatal day 2 for RNA extraction and hybridization on Affymetrix microarrays. We sought to identify the target genes of transcription factor ZBTB20 in hippocampal development. To that end, we isolated the hippocampi from ZBTB20 knockout and their littermate control mice.
2010-03-08 | E-GEOD-19513 | biostudies-arrayexpress
Project description:Zinc finger protein ZBTB20 plays a critical role in mouse hippocampal development by orchestrating gene expression profile of hippocampal neurons. We used microarrays to investigate the target gene of ZBTB20 in mouse hippocampal development.
2010-03-08 | GSE19513 | GEO
Project description:The zinc finger factor Insm1 is known to regulate differentiation of pancreatic β cells during development, Here we show that Insm1 is essential for the maintenance of functionally mature pancreatic β cells in mice. We used microarrays to analyse the global gene expression after deletion of insm1 in adult pancreatic β cells and identified functional important genes and immature islets releated genes deregulated in the mutatant islets.
2015-03-31 | GSE54044 | GEO
Project description:Zfp92, a repressive KRAB domain-containing zinc-finger protein, was identified by Gene Co-expression Network analysis to be an interesting candidate gene involved in endocrine specification and maturation. We examined the role of Zfp92, a KRAB-ZFP that is highly expressed in pancreatic islets of adult mice, by analyzing global Zfp92 knockout (KO) mice. Adult Zfp92 KO animals exhibited only mild changes in glucose homeostasis and no change in islet structure, although, male KO mice exhibited decreased growth, and female KO mice exhibited increased body fat accumulation on a high fat diet. We found that Zfp92 regulates a subset of transposable elements as well as Mafb, a transcription factor involved in islet development.
2022-12-02 | E-MTAB-11637 | biostudies-arrayexpress
Project description:The inability of the beta-cell to meet the demand for insulin brought about by insulin resistance leads to type 2 diabetes. In adults, beta-cell replication is one of the mechanisms thought to cause the expansion of beta-cell mass. Efforts to treat diabetes require knowledge of the pathways that drive facultative beta-cell proliferation in vivo. A robust physiological stimulus of beta-cell expansion is pregnancy, and identifying the mechanisms underlying this stimulus may provide therapeutic leads for the treatment of type 2 diabetes. The peak in beta-cell proliferation during pregnancy occurs on day 14.5 of gestation in mice. Using advanced genomic approaches, we globally characterize the gene expression signature of pancreatic islets on day 14.5 of gestation during pregnancy. We identify a total of 1,907 genes as differentially expressed in the islet during pregnancy. We demonstrate that the islet's ability to compensate for relative insulin deficiency during metabolic stress is associated with the induction of both proliferative and survival pathways. A comparison of the genes induced in three different models of islet expansion suggests that diverse mechanisms can be recruited to expand islet mass. The identification of many novel genes involved in islet expansion during pregnancy provides an important resource for diabetes researchers to further investigate how these factors contribute to the maintenance of not only islet mass, but ultimately beta-cell mass.
2010-06-26 | E-MTAB-120 | biostudies-arrayexpress
Project description:The cannabinoid 1 receptor (CB1) regulates insulin sensitivity and glucose metabolism in peripheral tissues. CB1 is expressed on pancreatic beta (β)-cells where its functions have not been fully described. We generated a β-cell-specific CB1-knockout (β-CB1-/-) mouse to study the long-term consequences of CB1 ablation on β-cell function in adult mice. β-CB1-/- mice had increased basal- and stimulated-insulin secretion and intra-islet cAMP levels, resulting in primary hyperinsulinemia, as well as increased β-cell viability, proliferation, and islet area. Hyperinsulinemia led to insulin resistance, which was aggravated by a high fat/high glucose diet and weight gain, although β-cells maintained their insulin secretory capacity in response to glucose. Strikingly, islets from β-CB1-/- mice were protected from diet-induced inflammation. Mechanistically we show that this is a consequence of curtailment of oxidative stress and reduced activation of Nlrp3 inflammasome in β-cells. Our data demonstrate CB1 to be a negative regulator of β-cells and a mediator of islet inflammation under conditions of metabolic stress.
2018-03-07 | GSE102027 | GEO
Project description:This submission comprises RNA-Seq profiling of in vivo differentiated pancreatic beta cells types and primary islet-derived pancreatic beta cell sources. The study reports that re-aggregation of immature beta-like cells (d20Beta) and removal of progenitor cells leads to further maturation in vitro resulting in beta-cells (eBCBeta) that are closer to human primary islet-derived beta-cells(IsletBeta). As a control stem cell derived spheres were dissocated, reassociated and taken through till the end of the protocol (NECBeta).
2019-02-01 | GSE109795 | GEO
Project description:Pancreatic islet transplantation as a cure for type 1 diabetes (T1D) cannot be scaled up due to a scarcity of human pancreas donors. In vitro expansion of beta cells from mature human pancreatic islets provides an alternative source of insulin-producing cells. The exact nature of the expanded cells produced by diverse expansion protocols, and their potential for differentiation into functional beta cells, remain elusive. We performed a large-scale meta-analysis of gene expression in human pancreatic islet cells, which were processed using three different previously described protocols for expansion and attempted re-differentiation. All three expansion protocols induced dramatic changes in the expression profiles of pancreatic islets; many of these changes are shared among the three protocols. Attempts at re-differentiation of expanded cells induce a limited number of gene expression changes. Nevertheless, these fail to restore a pancreatic islet-like gene expression pattern. Comparison with a collection of public microarray datasets confirmed that expanded cells are highly comparable to mesenchymal stem cells. Genes induced in expanded cells are also enriched for targets of transcription factors important for pluripotency induction. The present data increases our understanding of the active pathways in expanded and re-differentiated islets. Knowledge of the mesenchymal stem cell potential may help development of drug therapeutics to restore beta cell mass in T1D patients. Experiment Overall Design: In this study, we have tested three different protocols to expand human pancreatic islets in monolayer and after attempted maneuvers to re-differentiate the expanded cells back to islets. We have characterized the resulting cells in detail by performing microarray analyses with fresh pancreatic islets, expanded islet cells and re-differentiated cells. Genes modified by either of three protocols have 70 to 80% overlap with the genes changed by the other two protocols. Although there are promising changes in the right direction, none of the three protocols could achieve a return to a functional islet state. The expanded cells highly resemble Mesenchymal Stem Cells (MSC), and similar gene regulatory networks seem to be active in both cell types. On the other hand, the expanded islet cells are different from MSC in that they seem to retain activity of some islet gene modules. The current results highlight the importance of designing new strategies that take into account the MSC potential of expanded cells.
2009-08-07 | E-GEOD-15543 | biostudies-arrayexpress
Project description:The zinc finger factor Insm1 is known to regulate differentiation of pancreatic ? cells during development, Here we show that Insm1 is essential for the maintenance of functionally mature pancreatic ? cells in mice. We used microarrays to analyse the global gene expression after deletion of insm1 in adult pancreatic ? cells and identified functional important genes and immature islets releated genes deregulated in the mutatant islets. We used 8 mutant and 8 litter matched control mice for the islets preparation.
2015-03-31 | E-GEOD-54044 | biostudies-arrayexpress