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Induction of insulin gene transcription by Gli-similar Krüppel-like zinc finger protein 3, Glis3, in αTC1-9 cells

ABSTRACT: In this study, we examined the effect of Glis3 on the transcriptional activation of gene expression, including insulin gene, in pancreatic α-cell line, αTC1-9, which do not express the insulin gene. We demonstrate that Glis3 induces the transcription of the insulin and identified a number of other genes that are induced by Glis3.

ORGANISM(S): Mus musculus

PROVIDER: GSE72566 | GEO | 2016/03/14

SECONDARY ACCESSION(S): PRJNA294334

REPOSITORIES: GEO

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Induction of insulin gene transcription by Gli-similar KrÃ¼ppel-like zinc finger protein 3, Glis3, in Î±TC1-9 cells

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Project description:Glis3 is expressed in pancreatic beta and PP cells. To identify down stream target genes of Glis3, we performed microarray analysis using pancreas total RNAs from 1 week-old WT and Glis3KO2 mice. insulin and pancreatic polypeptide (Ppy) was significantly decreased together with several other Î² cell markers, Glut2 and MafA by microarray analysis. Immunohistochemistry, QRT-PCR, and transmission electron microscopy indicated that postnatal Glis3KO2 pancreas still contains a large population of Î² cells that express Pdx-1, Nkx6.1, and Isl-1; however, insulin production and secretory granules were greatly reduced in these cells. In addition, chromogranin A (ChgA) and Urocortin 3, which are associated with mature Î² cells, was dramatically decreased in Glis3KO2 pancreas. These observations suggest that Glis3 plays a critical role in the maturation of pancreatic Î² cell phenotype. Pancreatic total RNAs were purified from 4 WT and 4 Glis3KO2 at 1 week old age. Then the samples were applied to Agilent mouse genome chip.

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