Project description:Transgenic mice were generated that expressed the inhibitor of apoptosis and mitotic regulator survivin in pancreatic islet beta cells. Control non-transgenic or transgenic islets were then used in a model of islet transplantation in diabetic recipient mice and tested for their ability to correct hyperglycemia and allow long-term engraftment of tranplanted islets in vivo. Control or transgenic islets were analyzed by chip microarray for potential transcriptional changes associated with transgenic expression of survivin, in vivo.
Project description:C57BLKS/J mice are susceptible to diabetes, because of islet dysfunction, whereas C57BL6/J mice are not. Differences in gene expression between the two strains may account for this sensitivity. Furthermore these differences may only be evident in the hyperstimulated (diabetic or hyperglycemic) state. To this end profiling islets from these two strains cultured in both low and high glucose may reveal the underlying mechanism. Keywords: Mouse strain comparison under different culture conditions In the study presented here, pancreatic islets from 20 mice grown in low and high glucose conditions were assayed for differences in gene expression. (five C57BLKS/J low glucose, four C57BLKS/J high glucose, six C57BL6/J low glucose, five C57BL6/J high glucose). Technical replicates are achieved by labeling each sample with both Cy3 and Cy5, and combining the values for each hybridization.
Project description:loss of Men1 in mouse pancreatic islet cells alters the epigenetic landscape of a subset of target genes. H3K4me3 ChIP-seq from either mouse pancreatic islets or mouse pancreatic islet tumors harvested at different stages.
Project description:The goal of this study is to investigate how WTAP regulates islet β-cell function. Islets were isolated from pancreatic islets of Wtapflox/flox and Wtap-βKO mice at 7 weeks old. One islet sample was combined from three mice. Total RNA was extracted using Tripure Isolation Reagent (Roche, Mannheim, Germany). Three independent biological replicates for each group were used for RNA-seq. RNA-seq was performed by deep sequencing using an Illumina Novaseq 6000 platform. Paired-end clean reads were aligned to the mouse reference genome(GRCm38/mm10) with Hisat2 v2.0.5, and the aligned reads were used to quantify mRNA expression by using featureCounts v1.5.0-p3. Our study represents the first detailed analysis of islet transcriptomes from Wtapflox/flox and Wtap-βKO mice, generated by RNA-seq technology. The RNA-seq analysis showed that 3015 genes were downregulated and 2900 genes were upregulated in the pancreatic islets of Wtap-βKO mice.
