Project description:Glucotoxicity of INS-1 cells stimulation by chronic high glucose. We used microarrays to detail the global programme of gene expression underlying cellularization and identified distinct classes of up and down-regulated genes during this process.
Project description:Four rat insulinoma cell lines (INS-1) were generated that contain a FRT site for FLP recombinase mediated site specific integration of specific genes. In addition, the cell lines contain the tetracycline repressor allowing tetracycline (tet) induction of the introduced gene. By comparing the gene expression profiles of uninduced and tet-induced cells, target genes of introduced transcription factors or other signal tranduction molecules can be identified. The expression profiles of the parental INS-1 cell line and the four derivatives were determined on a RAE230A array, showing that the highly differentiated phenotype of the parental cell line was maintained in the clones.
Project description:A rat insulinoma cell line (INS-1) was generated that contains a FRT site for FLP recombinase mediated site specific integration of specific genes. In addition, the line contains the tetracycline repressor allowing tetracycline (tet) induction of the introduced gene. By comparing the gene expression profiles of uninduced and tet-induced cells, target genes of introduced transcription factors HNF1b and HNF1b mutants were identified. Two different clones containing the same transcription factor were analyzed in the non-induced and tet-induced (24 h) state.
Project description:Long term exposure to incretin hormones is known to have salutory effects on beta cell function and viability. While short-term cAMP induction is known to have a signature CREB-CRTC target gene response, the long-term effects of cAMP on beta cell gene expression are less well understood. We used rat microarray analysis to compare the genome-wide gene expression response to short-term (2 hours) and long-term (16 hours) stimulations of the cAMP agonist forskolin in INS-1 insulinoma cells.
Project description:Long term exposure to incretin hormones is known to have salutory effects on beta cell function and viability. While short-term cAMP induction is known to have a signature CREB-CRTC target gene response, the long-term effects of cAMP on beta cell gene expression are less well understood. We used rat microarray analysis to compare the genome-wide gene expression response to short-term (2 hours) and long-term (16 hours) stimulations of the cAMP agonist forskolin in INS-1 insulinoma cells. INS-1 cells were exposed to forskolin for 2 or 16 hours in RPMI medium containing 10% serum. Control samples wer incubated for the same time without forskolin. Extracted RNA was used for hybridization on Affymetrix rat 1.0 st gene arrays.
Project description:The aim of this study was to identify the gene expression changes associated with glucose responsiveness in Rat INS-1 derived cell lines. RNA was prepared from cell lines which were shown to be highly glucose responsive and also lines which were shown to be poorly glucose responsive. Dr. Chris Newgard's lab quantified the RNA and sent it frozen in water. 3 biological replicates per condition were sent for the following conditions: (i) 832/13 and 833/15, robust glucose responsiveness; (ii)832/1 and 832/2 showed poor glucose responsiveness.
Project description:Four rat insulinoma cell lines (INS-1) were generated that contain a FRT site for FLP recombinase mediated site specific integration of specific genes. In addition, the cell lines contain the tetracycline repressor allowing tetracycline (tet) induction of the introduced gene. By comparing the gene expression profiles of uninduced and tet-induced cells, target genes of introduced transcription factors or other signal tranduction molecules can be identified. The expression profiles of the parental INS-1 cell line and the four derivatives were determined on a RAE230A array, showing that the highly differentiated phenotype of the parental cell line was maintained in the clones. Keywords: ordered
Project description:miRNAs are exported to high density lipoproteins (HDL). This study aimed to understand what miRNAs are exported from INS-1 cells to HDL in vitro.
Project description:A doxycyline-inducible INS-1 insulinoma cell line expressing proinsulin (C96Y)-GFP was engineered. Addition of doxycyline causes the production of the proinsulin (C96Y)-GFP, which is retained in the endoplasmic reticulum. This study analyzes the gene expression changes that occur after doxycyline-induced expression of proinsulin (C96Y)-GFP for 24h, 48h and 5 days. Expression changes were compared between control un-induced cells and cells treated with doxycyline. Three replicates (experiments) were performed for each time point. Stable mutant insulin-expressing insulinoma cells were treated or not with doxycyline for 24h, 48h or 5 days and RNA was extracted for expression analysis.