Project description:Protein source in diet greatly influences the incidence of type-1 diabetes (T1D) in non-obese diabetic (NOD) mouse colonies. NOD mice fed a diet containing hydrolyzed casein (HC) as the sole protein source are protected from T1D. Replacing 1/5th of the HC with gluten restores high T1D to NOD mice. We hypothesized that gluten might promote inflammation in the islets. We used single cell RNA sequencing (scRNAseq) to characterize and contrast the transcriptional profiles of endocrine cells and islet infiltrating leukocytes from the pancreatic islets of Langerhans of NOD mice fed a 20% HC diet or a 16% HC + 4% gluten diet.
Project description:Protein source in diet greatly influences the incidence of type-1 diabetes (T1D) in non-obese diabetic (NOD) mouse colonies. NOD mice fed a diet containing hydrolyzed casein (HC) as the sole protein source are protected from T1D. Replacing 1/5th of the HC with gluten restores high T1D to NOD mice. We hypothesized that gluten might promote inflammation in the islets. We used TCR sequencing to characterize the clonal frequency of infiltrating T cells from the pancreatic islets of Langerhans of NOD mice fed a 20% HC diet or a 16% HC + 4% gluten diet.
Project description:Islets from 6-week old NOR and NOD mice were submitted to proteomics analysis to study differences in insulitis and type 1 diabetes development.
Project description:NOD-Idd22 mice are congenic mice of NOD background with a piece of chromosome 8 being substituted with ALR genetic material. These mice are resistant to spontaneous autoimmune diabetes as well as chemically induced in vivo islet beta cell destructions. The goal of this project is to come pare gene expressions in islets between NOD-Idd22 and NOD mice. NOD-Rag1 was used instead of NOD to avoid lymphocyte infiltrtation in isltes.
Project description:Fluoride (F) is used in dentistry, in therapeutic doses, to prevent dental caries. Recently, animal studies have suggested that in low doses, F might reduce glucose and be beneficial in the prophylaxis of diabetes, but the involved mechanisms are still unknown. The present study evaluated changes in the pancreatic islets of NOD mice exposed to low dose of F, using morphological, immunohistochemical and proteomic tools.
Project description:Purpose: The goals of this study is to examine if feeding NOD mice with diets supplemented with SCFAs causes altered gene expression in Splenic B cells Methods: B cell RNA profiles from NOD.LT mice fed fed different diets, a non-purified diet (n=4), a high amylose diet (n=4), a high amylose diet supplemented with acetate (n=4) or a high amylose diet supplemented with butyrate (n=4) were generated by deep sequencing, in triplicate, by Illumina 100 - base HT mode the sequence reads that passed quality filters were summarized into gene models using featureCounts from the Rsubread package, and differential gene expression for the various contrasts between dietary treatments was identified using the EdgeR analysis in R Results: Using an optimized data analysis workflow, we mapped about 20 million sequence reads per sample to the mouse genome (build GRCm38) and identified 16,257 transcripts present in B cells from NOD.LT mice fed different diet. Conclusions: Our study investigates how differing diets alter the expression of important genes in B cells, allowing us to further understand the role diets can play in modulating T1D development.
Project description:Single cell RNA sequencing was performed on adult NOD-SCID mice to identify the various cell types in the pancreatic islets of Langerhans