Rattus norvegicus
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ABSTRACT:
PROVIDER: PRJNA319170 | ENA |
REPOSITORIES: ENA
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Project description:Modulation of the diet and gastrointestinal microbiota normalizes systemic inflammation and β-cell chemokine expression associated with autoimmune diabetes susceptibility
| PRJNA319170 | ENA
Project description:Modulation of the gastrointestinal microbiota normalizes the systemic inflammation and islet immunocyte recruitment capacity associated with autoimmune diabetes (in Biobreeding rats)
| PRJNA319167 | ENA
Project description:Modulation of the gastrointestinal microbiota normalizes the systemic inflammation and islet immunocyte recruitment capacity associated with autoimmune diabetes (in Biobreeding rats) [RatIslet_Longitudinal]
| PRJNA319169 | ENA
Project description:Modulation of the gastrointestinal microbiota normalizes the systemic inflammation and islet immunocyte recruitment capacity associated with autoimmune diabetes (in Biobreeding rats) [RatPBMC_D30HCD-ABS]
| PRJNA319168 | ENA
Project description:Type 1 diabetes (T1D) is an autoimmune disease characterized by destruction of the pancreatic β-cells. T1D pathogenesis has a strong genetic basis. However, in recent decades, the prevalence of high-risk HLA haplotypes among new diagnoses has declined, the age of onset has decreased, and T1D incidence has increased. These changes are consistent with increased environmental pressure and coincide with introduction of the Western diet, widespread antibiotic use and reduced breast feeding. These factors are thought to drive intestinal dysbiosis, increased gut permeability and systemic inflammation. Notably, our studies of T1D families and the BioBreeding (BB) rat have identified a peripheral inflammatory state associated with diabetes susceptibility that is consistent with microbial antigen exposure and pattern recognition receptor ligation. Lactiplantibacillus plantarum 299v (Lp299v), a probiotic strain, is reported to increase plasma and stool levels of anti-inflammatory short chain fatty acids (SCFA) and promote IL-10 signaling in colonic derived macrophages and T-cells. Here we investigated the effect of Lp299v supplement on T1D progression and inflammatory phenotypes in diabetes prone BB DRlyp/lyp rats. Rats were weaned at 21 days onto a normal cereal diet (ND) or a gluten-free hydrolyzed casein diet (HCD), with and without daily Lp299v supplementation. All DRlyp/lyp ND rats developed T1D by day 83 (mean time to onset of 62.8+/-7.9 days). DRlyp/lyp ND+Lp299v rats exhibited an insignificant delay in T1D onset (62.6+/-6.5 days), however 8% remained diabetes-free to day 130. Providing DRlyp/lyp rats HCD prevented T1D in 17% of rats (to age 130 days) and significantly delayed onset (mean time to onset 72.8+/-7.3 days, p<0.001). Providing DRlyp/lyp rats HCD+Lp299v prevented T1D in 25% of rats and more robustly delayed onset (mean time to onset 84.9 +/-14.3 days, p<0.001). While multiplex ELISA failed to detect significantly altered plasma cytokine/chemokine levels at 40 days of life, plasma induced transcription revealed greatest normalization of systemic inflammation in the HCD+Lp299v group. Plasma SCFA levels (propionate and butyrate, p<0.01) were elevated in the HCD+Lp299v group compared to the ND group. Global gene expression analysis of pancreatic islets was conducted at 40 days, prior to insulitis. Endoplasmic reticulum (ER) stress has been implicated in the formation of islet neoantigens that may underlie the initial loss of immune tolerance in T1D. Under one or both diets, Lp299v favorably modulated islet expression levels of pathways and transcripts related to inflammation and innate immunity (Cxcl9, Cxcl10), oxidative stress (Gsta1, Gsta4, Gstp1, Gstk1), as well as ER stress and unfolded protein response (Cirbp, Edem1, Hspa1a, Atf4). These ongoing studies add to a growing understanding that inherited susceptibility can be modulated by diet and microbiota.
2022-10-01 | GSE198617 | GEO
Project description:The incidence of Type 1 diabetes (T1D), a T-cell mediated autoimmunity that targets the insulin secreting β-cells, has significantly increased, suggesting greater environmental pressure. In studies of T1D families and the BioBreeding rat model, we have identified a peripheral innate inflammatory state that is associated with diabetes susceptibility, consistent with pattern recognition receptor (PRR) ligation, but independent of disease progression. Here, compared to control strains, islets of spontaneously diabetic BB DRlyp/lyp and nondiatetic BB DR+/+ weanlings provided a standard cereal diet were found to temporally express a proinflammatory transcriptional program consistent with microbial antigen exposure that included numerous cytokines/chemokines. Dependence of this proinflammatory phenotype on the diet and gastrointestinal microbiota was investigated by transitioning DR+/+ weanlings to a hydrolyzed casein diet (HCD) or treating them with antibiotics to respectively alter or reduce PRR ligand exposure. Sequencing of the bacterial 16S rRNA gene revealed that these treatments significantly altered the ileal and cecal microbiota, resulting in increases in the Firmicutes:Bacteriodetes ratio, and abundances of lactobacilli and butyrate producing genera. Both treatments partially normalized the peripheral inflammatory state, reducing plasma cytokine, chemokine and TLR-4 activity levels. The proinflammatory islet transcriptome was more extensively normalized by HCD and immune-fluorescent staining revealed reductions in β-cell chemokine expression. HCD and antibiotic treatment did not normalize BB rat PBMC hyper-responsiveness to ex vivo mitogen stimulation. Combined, these studies link islet-level T1D susceptibility in BB rats to a genetically controlled innate inflammatory state that is influenced by environmental determinants encompassing the diet and the intestinal microbiota.
2018-01-23 | GSE80515 | GEO
Project description:The incidence of Type 1 diabetes (T1D), a T-cell mediated autoimmunity that targets the insulin secreting β-cells, has significantly increased, suggesting greater environmental pressure. In studies of T1D families and the BioBreeding rat model, we have identified a peripheral innate inflammatory state that is associated with diabetes susceptibility, consistent with pattern recognition receptor (PRR) ligation, but independent of disease progression. Here, compared to control strains, islets of spontaneously diabetic BB DRlyp/lyp and nondiatetic BB DR+/+ weanlings provided a standard cereal diet were found to temporally express a proinflammatory transcriptional program consistent with microbial antigen exposure that included numerous cytokines/chemokines. Dependence of this proinflammatory phenotype on the diet and gastrointestinal microbiota was investigated by transitioning DR+/+ weanlings to a hydrolyzed casein diet (HCD) or treating them with antibiotics to respectively alter or reduce PRR ligand exposure. Sequencing of the bacterial 16S rRNA gene revealed that these treatments significantly altered the ileal and cecal microbiota, resulting in increases in the Firmicutes:Bacteriodetes ratio, and abundances of lactobacilli and butyrate producing genera. Both treatments partially normalized the peripheral inflammatory state, reducing plasma cytokine, chemokine and TLR-4 activity levels. The proinflammatory islet transcriptome was more extensively normalized by HCD and immune-fluorescent staining revealed reductions in β-cell chemokine expression. HCD and antibiotic treatment did not normalize BB rat PBMC hyper-responsiveness to ex vivo mitogen stimulation. Combined, these studies link islet-level T1D susceptibility in BB rats to a genetically controlled innate inflammatory state that is influenced by environmental determinants encompassing the diet and the intestinal microbiota.
2018-01-23 | GSE80517 | GEO
Project description:The incidence of Type 1 diabetes (T1D), a T-cell mediated autoimmunity that targets the insulin secreting β-cells, has significantly increased, suggesting greater environmental pressure. In studies of T1D families and the BioBreeding rat model, we have identified a peripheral innate inflammatory state that is associated with diabetes susceptibility, consistent with pattern recognition receptor (PRR) ligation, but independent of disease progression. Here, compared to control strains, islets of spontaneously diabetic BB DRlyp/lyp and nondiatetic BB DR+/+ weanlings provided a standard cereal diet were found to temporally express a proinflammatory transcriptional program consistent with microbial antigen exposure that included numerous cytokines/chemokines. Dependence of this proinflammatory phenotype on the diet and gastrointestinal microbiota was investigated by transitioning DR+/+ weanlings to a hydrolyzed casein diet (HCD) or treating them with antibiotics to respectively alter or reduce PRR ligand exposure. Sequencing of the bacterial 16S rRNA gene revealed that these treatments significantly altered the ileal and cecal microbiota, resulting in increases in the Firmicutes:Bacteriodetes ratio, and abundances of lactobacilli and butyrate producing genera. Both treatments partially normalized the peripheral inflammatory state, reducing plasma cytokine, chemokine and TLR-4 activity levels. The proinflammatory islet transcriptome was more extensively normalized by HCD and immune-fluorescent staining revealed reductions in β-cell chemokine expression. HCD and antibiotic treatment did not normalize BB rat PBMC hyper-responsiveness to ex vivo mitogen stimulation. Combined, these studies link islet-level T1D susceptibility in BB rats to a genetically controlled innate inflammatory state that is influenced by environmental determinants encompassing the diet and the intestinal microbiota.
2018-01-23 | GSE80516 | GEO
Project description:Maternal inflammation promotes autoimmune susceptibility in offspring
| PRJNA694443 | ENA
Project description:Maternal inflammation promotes autoimmune susceptibility in offspring
| PRJNA695522 | ENA