The link between diabetes main metabolic alterations and breast cancer progression
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PROVIDER: PRJNA744920 | ENA |
REPOSITORIES: ENA
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Project description:Several reports have linked diabetes to cancer development, however, the exact molecular mechanism of how diabetes-related traits contribute to cancer progression is not fully understood. The current study aimed to explore the molecular mechanism underlying the potential effect of hyperglycemia combined with hyperinsulinemia in the progression of breast cancer cells. To this end, gene dysregulation induced by the exposure of MCF-7 breast cancer cells to hyperglycemia, or a combination of hyperglycemia and hyperinsulinemia was analyzed using Microarray gene expression assay. Hyperglycemia combined with hyperinsulinemia induced differential expression of 45 genes (greater than or equal to two-fold), which were not shared by other treatments in this study.
2023-07-22 | GSE179768 | GEO
Project description:The understanding of protein alterations in the diabetic heart is of vital importance because of increased risk of cardiovascular co-morbidities. The study aims at elucidating metabolic pathways in the diabetic rat heart during development of Type 2 diabetes mellitus using MS based proteomics.
2018-06-26 | PXD009538 | Pride
Project description:The understanding of protein alterations in the diabetic heart is of vital importance because of increased risk of cardiovascular co-morbidities. The study aims at elucidating metabolic pathways in the diabetic rat heart during development of Type 2 diabetes mellitus using MS based proteomics.
2018-06-26 | PXD009554 | Pride
Project description:The understanding of protein alterations in the diabetic heart is of vital importance because of increased risk of cardiovascular co-morbidities. The study aims at elucidating metabolic pathways in the diabetic rat heart during development of Type 2 diabetes mellitus using MS based proteomics.
2018-06-26 | PXD009555 | Pride
Project description:The goals and objectives: To study Type 2 diabetes progression and the development of insulin resistance in two animal models with and without a high fat diet superimposed on these models. Background: Diabetes is a systemic metabolic imbalance involving multiple tissues/organs, and an early hallmark feature of this disease state is insulin resistance. Multifactorial interactions of genetics, prenatal environmental factors (fetal programming) and postnatal environmental factors (nutrition and activity) likely contribute to the diabetic phenotype.Animal models can serve as a valuable tool for studying diabetes disease progression and for identifying useful biomarkers of type 2 diabetes. Several inbred rodent models are available for diabetes related studies. The GK rat is an obvious choice among available inbred models as the genetic basis for this inheritable form of diabetes is polygenic (5), unlike most other inbred rodent models that exhibit single gene defects. Many of the characteristics of the GK rat mirror human diabetes (hyperglycemia, glucose intolerance, insulin resistance), although hyperlipidemia does not appear to be prominent in the GK rat. Due to its polygenic mode of inheritance and 100% penetrance, the GK rat may be a useful model for human diabetes. Induced animal models can also be useful in diabetes studies. One such model is metabolic syndrome resulting from experimentally induced fetal programming (produced by maternal malnutrition or by exposure to corticosteroids in the third trimester). Both in humans and animals, accumulating evidence suggests that alterations in the human fetal environment can result in permanent physiologic changes that manifest as increased incidence of adult onset pathology. Numerous epidemiological studies have forged a strong link between low birth weight and the development of metabolic syndrome in adulthood. From such observations has arisen the concept of âfetal programmingâ whereby exposure to some factor(s) during crucial stages in development can permanently alter or âresetâ physiologic/metabolic functions. In the rat, exposure to corticosteroids during a âwindowâ in third trimester gestation (CS programming) results in fetal growth retardation and insulin resistance in adult offspring. Genetic factors play a primarily role in the etiology of diabetes in the GK rat, whereas fetal environmental factors are causative in CS programming. (It should be noted that although altered fetal environmental effects, most likely stemming from maternal hyperglycemia, have been implicated to play some role in the decreased pancreatic B cell mass in GK rats, these effects occur earlier in gestation and therefore differ from programming by CS in late gestation.) A comparison of the development of insulin resistance in the GK rat with development in the CS programmed rat will provide insight into genetic and fetal environmental factors in disease development. Superimposing dietary alterations (i.e., high fat feeding) (11) on both animal models may aid in the dissection of multiple interacting factors (genetic, fetal environmental factors, postnatal environmental factors) on the development and progression of insulin resistance and type 2 diabetes. Such studies may also aid in the identification of useful biomarkers for insulin resistance and type 2 diabetes in humans. Proposed research: Experiments are designed to study disease progression and the development of insulin resistance in two animal models: the GK rat and the CS programmed rat, with and without a high fat diet superimposed on these models. Animals will be maintained in our facility from weaning (GK rats) or birth (CS programmed - WKY), and body weights taken weekly. Appropriate diets (normal or high fat) will be introduced at weaning. Groups of animals (N=6) will be sacrificed at 5 different ages: 4, 8, 12, 16, and 20 weeks. Plasma samples will be analyzed for markers of hyperglycemia, hyperinsulinemia, dyslipidimia, and for selected other hormonal factors which may contribute to disease etiology (adiponectin, leptin, corticosterone). At sacrifice, muscle is harvested, flash-frozen in liquid nitrogen, and warehoused in our tissue collection maintained at - 80 degrees C for this and possible future work. Study will initially focus on examination of selected molecular markers of insulin resistance at the mRNA level in rat abdominal fat (PEPCK, IRS-1). Experiment Overall Design: The study contains: 50 adipose tissue samples from GK (GotoKakizake) rats and 51 adipose tissue samples from WKY (WistarKyoto) rats feeded with normal diet (ND) and high fat diet (HFD) and sacrificed at 5 different ages: 4, 8, 12, 16, and 20 weeks. So, each time point contains 5 GK samples with ND, 5 GK samples with HFD, 5 WKY samples with ND and 5 WKY samples with HFD.
2009-11-10 | E-GEOD-13268 | biostudies-arrayexpress
Project description:Diabetes mellitus is associated with serious long-term complications, including increased cardiovascular risk and a higher occurrence of infections. These diabetes-related complications are suggestive of altered responses of the innate immune system. Recent studies have shown that energy metabolism of monocytes is a crucial determinant of their functionality. Here we investigate whether metabolism and function of monocytes are changed in patients with diabetes and aim to identify diabetes-associated factors driving these alterations. Patients with type 1 diabetes (T1D) and healthy age-, sex- and BMI-matched nondiabetic controls were recruited and detailed characteristics related to disease status including diabetes duration and glycemic burden (HbA1c levels) were collected. Monocytes were isolated from peripheral blood to determine immune functionality, metabolic responses and to perform transcriptome analyses. Upon ex vivo stimulation with TLR-4 agonist LPS or TLR-2 agonist P3C, monocytes of patients with T1D secreted lower levels of various cytokines (TNFα, IL-1β and IL-1Ra) and had lower glycolytic rates in comparison to monocytes isolated from matched controls. Stratification based on HbA1c levels revealed that a lower cytokine secretion was coupled to a higher glycolytic rate of monocytes in patients with a higher glycemic burden. Gene expression signatures of circulating monocytes displayed an enhanced inflammatory expression pattern that was associated with this high glycemic burden. A high glycemic burden in patients with T1D promotes expression of inflammatory genes of monocytes in vivo and is coupled to an impaired relationship between metabolism and inflammatory function upon activation ex vivo.
2020-10-09 | GSE154609 | GEO
Project description:Pancreatic islet beta cell heterogeneity has been identified, which plays a pivotal role in the pathological alterations of pancreatic islets in type 2 diabetes (T2D) mice. However, pathological alterations of beta cells in type 2 diabetes (T2D) mice remain to be investigated. We isolated pancreatic islets from the control and T2D mice and conducted scRNA-seq analysis using the 10x Genomics platform. Pathological alterations of beta cells in T2D were also explored.
2022-04-09 | GSE200531 | GEO
Project description:The goals and objectives: To study Type 2 diabetes progression and the development of insulin resistance in two animal models with and without a high fat diet superimposed on these models. Background: Diabetes is a systemic metabolic imbalance involving multiple tissues/organs, and an early hallmark feature of this disease state is insulin resistance. Multifactorial interactions of genetics, prenatal environmental factors (fetal programming) and postnatal environmental factors (nutrition and activity) likely contribute to the diabetic phenotype.Animal models can serve as a valuable tool for studying diabetes disease progression and for identifying useful biomarkers of type 2 diabetes. Several inbred rodent models are available for diabetes related studies. The GK rat is an obvious choice among available inbred models as the genetic basis for this inheritable form of diabetes is polygenic (5), unlike most other inbred rodent models that exhibit single gene defects. Many of the characteristics of the GK rat mirror human diabetes (hyperglycemia, glucose intolerance, insulin resistance), although hyperlipidemia does not appear to be prominent in the GK rat. Due to its polygenic mode of inheritance and 100% penetrance, the GK rat may be a useful model for human diabetes. Induced animal models can also be useful in diabetes studies. One such model is metabolic syndrome resulting from experimentally induced fetal programming (produced by maternal malnutrition or by exposure to corticosteroids in the third trimester). Both in humans and animals, accumulating evidence suggests that alterations in the human fetal environment can result in permanent physiologic changes that manifest as increased incidence of adult onset pathology. Numerous epidemiological studies have forged a strong link between low birth weight and the development of metabolic syndrome in adulthood. From such observations has arisen the concept of “fetal programming” whereby exposure to some factor(s) during crucial stages in development can permanently alter or “reset” physiologic/metabolic functions. In the rat, exposure to corticosteroids during a “window” in third trimester gestation (CS programming) results in fetal growth retardation and insulin resistance in adult offspring. Genetic factors play a primarily role in the etiology of diabetes in the GK rat, whereas fetal environmental factors are causative in CS programming. (It should be noted that although altered fetal environmental effects, most likely stemming from maternal hyperglycemia, have been implicated to play some role in the decreased pancreatic B cell mass in GK rats, these effects occur earlier in gestation and therefore differ from programming by CS in late gestation.) A comparison of the development of insulin resistance in the GK rat with development in the CS programmed rat will provide insight into genetic and fetal environmental factors in disease development. Superimposing dietary alterations (i.e., high fat feeding) (11) on both animal models may aid in the dissection of multiple interacting factors (genetic, fetal environmental factors, postnatal environmental factors) on the development and progression of insulin resistance and type 2 diabetes. Such studies may also aid in the identification of useful biomarkers for insulin resistance and type 2 diabetes in humans. Proposed research: Experiments are designed to study disease progression and the development of insulin resistance in two animal models: the GK rat and the CS programmed rat, with and without a high fat diet superimposed on these models. Animals will be maintained in our facility from weaning (GK rats) or birth (CS programmed - WKY), and body weights taken weekly. Appropriate diets (normal or high fat) will be introduced at weaning. Groups of animals (N=6) will be sacrificed at 5 different ages: 4, 8, 12, 16, and 20 weeks. Plasma samples will be analyzed for markers of hyperglycemia, hyperinsulinemia, dyslipidimia, and for selected other hormonal factors which may contribute to disease etiology (adiponectin, leptin, corticosterone). At sacrifice, muscle is harvested, flash-frozen in liquid nitrogen, and warehoused in our tissue collection maintained at - 80 degrees C for this and possible future work. Study will initially focus on examination of selected molecular markers of insulin resistance at the mRNA level in rat liver (PEPCK, PDK4). Keywords: Type 2 diabetes, biomarker, rat, liver, time series
2009-10-21 | GSE13270 | GEO
Project description:<p><strong>AIMS: </strong>Previous metabolomics studies suggest that type 1 diabetes is preceded by specific metabolic disturbances. The aim of this study was to investigate whether distinct metabolic patterns occur in peripheral blood mononuclear cells (PBMCs) of children who later develop pancreatic beta cell autoimmunity or overt type 1 diabetes.</p><p><strong>METHODS:</strong> In a longitudinal cohort setting, PBMC metabolomic analysis was applied in children who (1) progressed to type 1 diabetes (PT1D, n = 34), (2) seroconverted to ≥1 islet autoantibody without progressing to type 1 diabetes (P1Ab, n = 27) or (3) remained autoantibody negative during follow-up (CTRL, n = 10).</p><p><strong>RESULTS:</strong> During the first year of life, levels of most lipids and polar metabolites were lower in the PT1D and P1Ab groups compared with the CTRL group. Pathway over-representation analysis suggested alanine, aspartate, glutamate, glycerophospholipid and sphingolipid metabolism were over-represented in PT1D. Genome-scale metabolic models of PBMCs during type 1 diabetes progression were developed by using publicly available transcriptomics data and constrained with metabolomics data from our study. Metabolic modelling confirmed altered ceramide pathways, known to play an important role in immune regulation, as specifically associated with type 1 diabetes progression.</p><p><strong>CONCLUSIONS:</strong> Our data suggest that systemic dysregulation of lipid metabolism, as observed in plasma, may impact the metabolism and function of immune cells during progression to overt type 1 diabetes.</p><p><br></p><p><strong>Links: </strong></p><p>The GEMs for PBMCs have been submitted to <a href='https://www.ebi.ac.uk/biomodels/MODEL1905270001' rel='noopener noreferrer' target='_blank'>BioModels</a>, under accession number MODEL1905270001.</p>
2020-08-10 | MTBLS1015 | MetaboLights
Project description:Pancreatitis is more frequent in type 2 diabetes (T2DM) although the underlying cause is unknown. We tested the hypothesis that ongoing beta-cell stress and apoptosis in T2DM induces ductal tree proliferation, particularly the pancreatic duct gland (PDG) compartment, and thus potentially obstructs exocrine outflow. PDG replication was increased two-fold in human pancreas from individuals with T2DM (P<0.01), and was associated with increased pancreatic intraepithelial neoplasia (PanINs) (P<0.05), lesions associated with pancreatic inflammation and with the potential to obstruct pancreatic outflow. Increased PDG replication (p<0.05) in the prediabetic HIP rat model of T2DM was concordant with increased beta-cell stress but preceding metabolic derangement. Moreover, the most abundantly expressed chemokines released by the islets in response to beta-cell stress in T2DM, CXCL1, 4 and 10, induced proliferation in human pancreatic ductal epithelium (p<0.05). Also, the diabetes medications that are reported as potential modifiers for the risk of pancreatitis in T2DM modulated PDG proliferation accordingly. We conclude that chronic stimulation and proliferation of the PDG compartment of the pancreas in response to islet inflammation in T2DM is a novel mechanism that serves as a link to the increased risk for pancreatitis in T2DM and may potentially be modified by currently available diabetes therapy.
2016-12-02 | GSE90779 | GEO