scholarly journals The prolyl hydroxylase PHD3 maintains β-cell glucose metabolism during fatty acid excess

2020 ◽  
Author(s):  
Daniela Nasteska ◽  
Federica Cuozzo ◽  
Alpesh Thakker ◽  
Rula Bany Bakar ◽  
Rebecca Westbrook ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Insulin Secretion ◽  
Fatty Acid ◽  
Glucose Metabolism ◽  
High Fat Diet ◽  
High Fat ◽  
Β Cells ◽  
Β Cell ◽  
Cell Glucose ◽  
Fuel Source

ABSTRACTThe alpha ketoglutarate-dependent dioxygenase, prolyl-4-hydroxylase 3 (PHD3), is a hypoxia-inducible factor target that uses molecular oxygen to hydroxylate proline. While PHD3 has been reported to influence cancer cell metabolism and liver insulin sensitivity, relatively little is known about effects of this highly conserved enzyme in insulin-secreting β-cells. Here, we show that deletion of PHD3 specifically in β-cells (βPHD3KO) is associated with impaired glucose homeostasis in mice fed high fat diet. In the early stages of dietary fat excess, βPHD3KO islets energetically rewire, leading to defects in the management of pyruvate fate and a shift away from glycolysis. However, βPHD3KO islets are able to maintain oxidative phosphorylation and insulin secretion by increasing utilization of fatty acids to supply the tricarboxylic acid cycle. This nutrient-sensing switch cannot be sustained and βPHD3KO islets begin to show signs of failure in response to prolonged metabolic stress, including impaired glucose-stimulated ATP/ADP rises, Ca2+ fluxes and insulin secretion. Thus, PHD3 might be a pivotal component of the β-cell glucose metabolism machinery by suppressing the use of fatty acids as a primary fuel source, under obesogenic and insulin resistant states.SIGNIFICANCE STATEMENTProlyl-4-hydroxylase 3 (PHD3) is involved in the oxygen-dependent regulation of cell phenotype. A number of recent studies have shown that PHD3 might operate at the interface between oxygen availability and metabolism. To understand how PHD3 influences insulin secretion, which depends on intact glucose metabolism, we generated mice lacking PHD3 specifically in pancreatic β-cells. These mice, termed βPHD3KO, are apparently normal until fed high fat diet at which point their β-cells switch to fatty acids as a fuel source. This switch cannot be tolerated and β-cells in βPHD3KO mice eventually fail. Thus, PHD3 maintains glucose-stimulated insulin secretion in β-cells during states of fatty acid excess, such as diabetes and obesity.

scholarly journals SUN-658 CHL1 Increases Insulin Secretion&Negatively Regulates the Poliferation of Pancreatic β Cell

2020 ◽  
Vol 4 (Supplement_1) ◽  
Author(s):  
Tao Yang ◽  
Qi Fu ◽  
Hemin Jiang
Keyword(s):  
Cell Cycle ◽  
Insulin Secretion ◽  
Pancreatic Islets ◽  
High Fat Diet ◽  
Nod Mice ◽  
Pancreatic Β Cell ◽  
High Fat ◽  
Β Cells ◽  
Β Cell ◽  
Min6 Cells

Abstract CHL1 Increases Insulin Secretion & Negatively Regulates The Poliferation Of Pancreatic β Cell Objective: CHL1 belongs to neural recognition molecules of the immunoglobulin superfamily, is mainly expressed in the nervous system. CHL1 is involved in neuronal migration, axonal growth, and dendritic projection. RNA sequencing of single human islet cells confirmed that CHL1 had an expression difference in β cells of type 2 diabetes and healthy controls. However, whether CHL1 gene regulates islet function remained to be explored. Methods: PCR and Western Blot were applied to investigate the tissue distribution of CHL1 in wild-type C57BL/6J mice. The islet expression of CHL1 gene was observed in pancreatic islets of NOD mice and high-fat-diet C57BL/6J mice of different ages. MIN6 cells with siRNA to silence CHL1 or with lentivirus to overexpress CHL1 were constructed. Effects of the gene on proliferation, apoptosis, cell cycle and insulin secretion were determined by using CCK8, EdU, TUNEL, AV/PI, GSIS, electron microscopy and flow cytometry. Results: CHL1 was localized on the cell membrane and expressed in the nervous system, islet of pancreas and gastrointestinal tract. CHL1 was hypoexpressed in the pancreatic islets of obese mice, hyperexpressed in the pancreatic islets of NOD mice and in vitro after treated with cytokines. After silencing CHL1 in MIN6 cells, insulin secretion decreased in 20 mM glucose with down-regulation of INS1, SLC2A2 gene, and transmission electron microscope showed the number of insulin secretary granules <50nm from the cell membrane was significantly reduced. Silencing of CHL1 in MIN6 cells induced cell proliferation, reduced apoptosis rate, prolonged the S phase of cell cycle and shortened the G1 phase with downregulated expression of p21, p53 and up-regulated expression of cyclin D1, opposite results were found in CHL1 over-expressing MIN6 cells. Proliferation induced by silencing of CHL1 was inhibited by ERK inhibitor (PD98059), which indicates that ERK pathway is essential for signaling by these molecules in pancreatic β cell. Conclusion: The expression of CHL1 gene was significantly decreased in the pancreatic islets of obese mice induced by high-fat diet. The low expression of CHL1 gene promotes the proliferation of MIN6 cells through the ERK pathway and affect cell cycle through the p53 pathway. This may be one of the mechanisms that pancreatic β cells compensatory hyperplasia in the stage of obesity-induced pre-diabetes.

scholarly journals γ-Oryzanol Protects Pancreatic β-Cells Against Endoplasmic Reticulum Stress in Male Mice

Endocrinology ◽  
2015 ◽  
Vol 156 (4) ◽  
pp. 1242-1250 ◽  
Author(s):  
Chisayo Kozuka ◽  
Sumito Sunagawa ◽  
Rei Ueda ◽  
Moritake Higa ◽  
Hideaki Tanaka ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Insulin Secretion ◽  
Er Stress ◽  
High Fat Diet ◽  
Diabetic Mice ◽  
High Fat ◽  
Β Cells ◽  
Β Cell ◽  
Pancreatic Β Cells ◽  
Glucose Stimulated Insulin Secretion

Abstract Endoplasmic reticulum (ER) stress is profoundly involved in dysfunction of β-cells under high-fat diet and hyperglycemia. Our recent study in mice showed that γ-oryzanol, a unique component of brown rice, acts as a chemical chaperone in the hypothalamus and improves feeding behavior and diet-induced dysmetabolism. However, the entire mechanism whereby γ-oryzanol improves glucose metabolism throughout the body still remains unclear. In this context, we tested whether γ-oryzanol reduces ER stress and improves function and survival of pancreatic β-cells using murine β-cell line MIN6. In MIN6 cells with augmented ER stress by tunicamycin, γ-oryzanol decreased exaggerated expression of ER stress-related genes and phosphorylation of eukaryotic initiation factor-2α, resulting in restoration of glucose-stimulated insulin secretion and prevention of apoptosis. In islets from high-fat diet-fed diabetic mice, oral administration of γ-oryzanol improved glucose-stimulated insulin secretion on following reduction of exaggerated ER stress and apoptosis. Furthermore, we examined the impact of γ-oryzanol on low-dose streptozotocin-induced diabetic mice, where exaggerated ER stress and resultant apoptosis in β-cells were observed. Also in this model, γ-oryzanol attenuated mRNA level of genes involved in ER stress and apoptotic signaling in islets, leading to amelioration of glucose dysmetabolism. Taken together, our findings demonstrate that γ-oryzanol directly ameliorates ER stress-induced β-cell dysfunction and subsequent apoptosis, highlighting usefulness of γ-oryzanol for the treatment of diabetes mellitus.

scholarly journals Adenovirus-mediated overexpression of liver carnitine palmitoyltransferase I in INS1E cells: effects on cell metabolism and insulin secretion

2002 ◽  
Vol 364 (1) ◽  
pp. 219-226 ◽  
Author(s):  
Blanca RUBÍ ◽  
Peter A. ANTINOZZI ◽  
Laura HERRERO ◽  
Hisamitsu ISHIHARA ◽  
Guillermina ASINS ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Insulin Secretion ◽  
Fatty Acid ◽  
Fatty Acid Oxidation ◽  
Fold Increase ◽  
Acid Oxidation ◽  
Β Cells ◽  
Β Cell ◽  
Carnitine Palmitoyltransferase I ◽  
Cpt I

Lipid metabolism in the β-cell is critical for the regulation of insulin secretion. Pancreatic β-cells chronically exposed to fatty acids show higher carnitine palmitoyltransferase I (CPT I) protein levels, higher palmitate oxidation rates and an altered insulin response to glucose. We examined the effect of increasing CPT I levels on insulin secretion in cultured β-cells. We prepared a recombinant adenovirus containing the cDNA for the rat liver isoform of CPT I. The overexpression of CPT I in INS1E cells caused a more than a 5-fold increase in the levels of CPT I protein (detected by Western blotting), a 6-fold increase in the CPT activity, and an increase in fatty acid oxidation at 2.5mM glucose (1.7-fold) and 15mM glucose (3.1-fold). Insulin secretion was stimulated in control cells by 15mM glucose or 30mM KCl. INS1E cells overexpressing CPT I showed lower insulin secretion on stimulation with 15mM glucose (−40%; P<0.05). This decrease depended on CPT I activity, since the presence of etomoxir, a specific inhibitor of CPT I, in the preincubation medium normalized the CPT I activity, the fatty-acid oxidation rate and the insulin secretion in response to glucose. Exogenous palmitate (0.25mM) rescued glucose-stimulated insulin secretion (GSIS) in CPT I-overexpressing cells, indicating that the mechanism of impaired GSIS was through the depletion of a critical lipid. Depolarizing the cells with KCl or intermediary glucose concentrations (7.5mM) elicited similar insulin secretion in control cells and cells overexpressing CPT I. Glucose-induced ATP increase, glucose metabolism and the triacylglycerol content remained unchanged. These results provide further evidence that CPT I activity regulates insulin secretion in the β-cell. They also indicate that up-regulation of CPT I contributes to the loss of response to high glucose in β-cells exposed to fatty acids.

scholarly journals Inhibition of Small Maf Function in Pancreatic β-Cells Improves Glucose Tolerance Through the Enhancement of Insulin Gene Transcription and Insulin Secretion

Endocrinology ◽  
2015 ◽  
Vol 156 (10) ◽  
pp. 3570-3580 ◽  
Author(s):  
Hiroshi Nomoto ◽  
Takuma Kondo ◽  
Hideaki Miyoshi ◽  
Akinobu Nakamura ◽  
Yoko Hida ◽  
...  
Keyword(s):  
Insulin Secretion ◽  
Glucose Tolerance ◽  
High Fat Diet ◽  
Cell Function ◽  
High Fat ◽  
Β Cells ◽  
Β Cell ◽  
Β Cell Function

The large-Maf transcription factor v-maf musculoaponeurotic fibrosarcoma oncogene homolog A (MafA) has been found to be crucial for insulin transcription and synthesis and for pancreatic β-cell function and maturation. However, insights about the effects of small Maf factors on β-cells are limited. Our goal was to elucidate the function of small-Maf factors on β-cells using an animal model of endogenous small-Maf dysfunction. Transgenic (Tg) mice with β-cell-specific expression of dominant-negative MafK (DN-MafK) experiments, which can suppress the function of all endogenous small-Mafs, were fed a high-fat diet, and their in vivo phenotypes were evaluated. Phenotypic analysis, glucose tolerance tests, morphologic examination of β-cells, and islet experiments were performed. DN-MafK-expressed MIN6 cells were also used for in vitro analysis. The results showed that DN-MafK expression inhibited endogenous small-Maf binding to insulin promoter while increasing MafA binding. DN-MafK Tg mice under high-fat diet conditions showed improved glucose metabolism compared with control mice via incremental insulin secretion, without causing changes in insulin sensitivity or MafA expression. Moreover, up-regulation of insulin and glucokinase gene expression was observed both in vivo and in vitro under DN-MafK expression. We concluded that endogenous small-Maf factors negatively regulates β-cell function by competing for MafA binding, and thus, the inhibition of small-Maf activity can improve β-cell function.

scholarly journals Glucose and Insulin Stimulate Heparin-releasable Lipoprotein Lipase Activity in Mouse Islets and INS-1 Cells

2001 ◽  
Vol 276 (15) ◽  
pp. 12162-12168 ◽  
Author(s):  
Wilhelm S. Cruz ◽  
Guim Kwon ◽  
Connie A. Marshall ◽  
Michael L. McDaniel ◽  
Clay F. Semenkovich
Keyword(s):  
Fatty Acids ◽  
Insulin Secretion ◽  
Glucose Metabolism ◽  
Lipoprotein Lipase ◽  
Cell Function ◽  
Β Cells ◽  
Β Cell ◽  
Protein Mass ◽  
Β Cell Function

Lipoprotein lipase (LpL) provides tissues with triglyceride-derived fatty acids. Fatty acids affect β-cell function, and LpL overexpression decreases insulin secretion in cell lines, but whether LpL is regulated in β-cells is unknown. To test the hypothesis that glucose and insulin regulate LpL activity in β-cells, we studied pancreatic islets and INS-1 cells. Acute exposure of β-cells to physiological concentrations of glucose stimulated both total cellular LpL activity and heparin-releasable LpL activity. Glucose had no effect on total LpL protein mass but instead promoted the appearance of LpL protein in a heparin-releasable fraction, suggesting that glucose stimulates the translocation of LpL from intracellular to extracellular sites in β-cells. The induction of heparin-releasable LpL activity was unaffected by treatment with diazoxide, an inhibitor of insulin exocytosis that does not alter glucose metabolism but was blocked by conditions that inhibit glucose metabolism.In vitrohyperinsulinemia had no effect on LpL activity in the presence of low concentrations of glucose but increased LpL activity in the presence of 20 mmglucose. Using dual-laser confocal microscopy, we detected intracellular LpL in vesicles distinct from those containing insulin. LpL was also detected at the cell surface and was displaced from this site by heparin in dispersed islets and INS-1 cells. These results show that glucose metabolism controls the trafficking of LpL activity in β-cells independent of insulin secretion. They suggest that hyperglycemia and hyperinsulinemia associated with insulin resistance may contribute to progressive β-cell dysfunction by increasing LpL-mediated delivery of lipid to islets.

scholarly journals NUPR1 preserves insulin secretion of pancreatic β-cells during inflammatory stress by multiple low-dose streptozotocin and high-fat diet

2020 ◽  
Vol 319 (2) ◽  
pp. E338-E344 ◽  
Author(s):  
Günter Päth ◽  
Amir E. Mehana ◽  
Ingo H. Pilz ◽  
Marcus Alt ◽  
Johannes Baumann ◽  
...  
Keyword(s):  
Insulin Secretion ◽  
High Fat Diet ◽  
Low Dose ◽  
Cell Mass ◽  
High Fat ◽  
Metabolic Disturbances ◽  
Β Cells ◽  
Β Cell ◽  
Inflammatory Stress

Obesity is associated with dyslipidemia and subclinical inflammation that promotes metabolic disturbances including insulin resistance and pancreatic β-cell dysfunction. The nuclear protein, transcriptional regulator 1 (NUPR1) responds to cellular stresses and features tissue protective properties. To characterize the role of NUPR1 in endocrine pancreatic islets during inflammatory stress, we generated transgenic mice with β-cell-specific Nupr1 overexpression (βNUPR1). Under normal conditions, βNUPR1 mice did not differ from wild type (WT) littermates and display normal glucose homeostasis and β-cell mass. For induction of inflammatory conditions, mice were treated with multiple low-dose streptozotocin (mld-STZ) and/or fed a high-fat diet (HFD). All treatments significantly worsened glycaemia in WT mice, while βNUPR1 mice substantially preserved insulin secretion and glucose tolerance. HFD increased β-cell mass in all animals, with βNUPR1 mice tending to show higher values. The improved outcome of βNUPR1 mice was accompanied by decreased NF-κB activation and lymphocyte infiltration in response to mld-STZ. In vitro, isolated βNUPR1 islets preserved insulin secretion and content with insignificantly low apoptosis during culture stress and IL-1β exposure. These findings suggest that NUPR1 plays a vital role in the protection of β-cells from apoptosis, related degradation of insulin storages and subsequent secretion during inflammatory and obesity-related tissue stress.

scholarly journals Effects of dietary cis and trans unsaturated and saturated fatty acids on the glucose metabolites and enzymes of rats

2006 ◽  
Vol 95 (5) ◽  
pp. 947-954 ◽  
Author(s):  
Claudio A. Bernal ◽  
Jordi Rovira ◽  
Maryé E. Colandré ◽  
Roser Cussó ◽  
Joan A. Cadefau
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Glucose Metabolism ◽  
Saturated Fatty Acid ◽  
High Fat Diet ◽  
Saturated Fatty Acids ◽  
Control Group ◽  
High Fat ◽  
Glucose Metabolites ◽  
Intracellular Glucose

The aim of the present study was to examine whether the level of dietary cis fatty acid (c FA), or the isomers (trans or cis) and/or the saturation of the fatty acids at high dietary fat levels altered the intracellular glucose metabolites and certain regulatory enzyme activities in the skeletal muscle and liver of rats. The animals were fed for 30 d on either a recommended control diet (7% c FA, w/w) or a high-fat diet (20% fatty acids, w/w). The high-fat diet was enriched with either c FA, trans fatty acid (t FA), a moderate proportion of saturated fatty acid (MSFA), or a high proportion of saturated fatty acid (HSFA). The most striking findings were observed in the gastrocnemius muscle with a HSFA diet. There was a significant increase in glucose-6-phosphate (306 %), glucose-1-phosphate (245 %), fructose-6-phosphate (400 %), fructose-1,6-bisphosphate (86 %), glyceraldehyde- 3-phosphate (38 %), pyruvate (341 %), lactate (325 %), citrate (79 %) and the bisphosphorylated sugars as compared with the cFA diet. These changes were paralleled by an increase in muscle triacylglycerol content (49 %) and a decrease in glucose (39 %). In addition, the amount of cFA and the other types of fatty acid (i.e. t FA and MSFA) led to no great differences in glucose metabolism as compared with the respective control group. These data support the hypothesis that glucose changes induced by a HSFA diet are a multifaceted abnormality. Glucose and lactate transport and intracellular glucose metabolism could be the key biochemical defects involved in this detrimental effect on glucose metabolism.

Lipid rather than glucose metabolism is implicated in altered insulin secretion caused by oleate in INS-1 cells

1999 ◽  
Vol 277 (3) ◽  
pp. E521-E528 ◽  
Author(s):  
Laura Segall ◽  
Nathalie Lameloise ◽  
Françoise Assimacopoulos-Jeannet ◽  
Enrique Roche ◽  
Pamela Corkey ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Insulin Secretion ◽  
Fatty Acid ◽  
Glucose Metabolism ◽  
Acid Oxidation ◽  
Β Cells ◽  
Malonyl Coa ◽  
Basal Insulin Secretion ◽  
Low Glucose ◽  
Glucose Fatty Acid Cycle

A comprehensive metabolic study was carried out to understand how chronic exposure of pancreatic β-cells to fatty acids causes high basal secretion and impairs glucose-induced insulin release. INS-1 β-cells were exposed to 0.4 mM oleate for 3 days and subsequently incubated at 5 or 25 mM glucose, after which various parameters were measured. Chronic oleate promoted triglyceride deposition, increased fatty acid oxidation and esterification, and reduced malonyl-CoA at low glucose in association with elevated basal O2 consumption and redox state. Oleate caused a modest (25%) reduction in glucose oxidation but did not affect glucose usage, the glucose 6-phosphate and citrate contents, and the activity of pyruvate dehydrogenase of INS-1 cells. Thus changes in glucose metabolism and a Randle-glucose/fatty acid cycle do not explain the altered secretory properties of β-cells exposed to fatty acids. The main response of INS-1 cells to chronic oleate, which is to increase the oxidation and esterification of fatty acids, may contribute to cause high basal insulin secretion via increased production of reducing equivalents and/or the generation of complex lipid messenger molecule(s).

scholarly journals Fatty Acid and Lipopolysaccharide Effect on Beta Cells Proteostasis and its Impact on Insulin Secretion

Cells ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 884 ◽  
Author(s):  
Paloma Acosta-Montaño ◽  
Eustolia Rodríguez-Velázquez ◽  
Esmeralda Ibarra-López ◽  
Héctor Frayde-Gómez ◽  
Jaime Mas-Oliva ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Endoplasmic Reticulum ◽  
Insulin Secretion ◽  
Fatty Acid ◽  
Cell Viability ◽  
Insulin Release ◽  
Palmitoleic Acid ◽  
Cell Mass ◽  
Β Cells ◽  
Β Cell

Metabolic overload by saturated fatty acids (SFA), which comprises β-cell function, and impaired glucose-stimulated insulin secretion are frequently observed in patients suffering from obesity and type 2 diabetes mellitus. The increase of intracellular Ca2+ triggers insulin granule release, therefore several mechanisms regulate Ca2+ efflux within the β-cells, among others, the plasma membrane Ca2+-ATPase (PMCA). In this work, we describe that lipotoxicity mediated mainly by the saturated palmitic acid (PA) (16C) is associated with loss of protein homeostasis (proteostasis) and potentially cell viability, a phenomenon that was induced to a lesser extent by stearic (18C), myristic (14C) and lauric (12C) acids. PA was localized on endoplasmic reticulum, activating arms of the unfolded protein response (UPR), as also promoted by lipopolysaccharides (LPS)-endotoxins. In particular, our findings demonstrate an alteration in PMCA1/4 expression caused by PA and LPS which trigger the UPR, affecting not only insulin release and contributing to β-cell mass reduction, but also increasing reactive nitrogen species. Nonetheless, stearic acid (SA) did not show these effects. Remarkably, the proteolytic degradation of PMCA1/4 prompted by PA and LPS was avoided by the action of monounsaturated fatty acids such as oleic and palmitoleic acid. Oleic acid recovered cell viability after treatment with PA/LPS and, more interestingly, relieved endoplasmic reticulum (ER) stress. While palmitoleic acid improved the insulin release, this fatty acid seems to have more relevant effects upon the expression of regulatory pumps of intracellular Ca2+. Therefore, chain length and unsaturation of fatty acids are determinant cues in proteostasis of β-cells and, consequently, on the regulation of calcium and insulin secretion.

scholarly journals The Loss of ARNT/HIF1β in Male Pancreatic β-Cells Is Protective Against High-Fat Diet–Induced Diabetes

Endocrinology ◽  
2019 ◽  
Vol 160 (12) ◽  
pp. 2825-2836 ◽  
Author(s):  
Monica Hoang ◽  
Sabina Paglialunga ◽  
Eric Bombardier ◽  
A Russell Tupling ◽  
Jamie W Joseph
Keyword(s):  
Insulin Secretion ◽  
High Fat Diet ◽  
Cell Function ◽  
Glucose Sensing ◽  
Lipid Signaling ◽  
High Fat ◽  
Β Cells ◽  
Β Cell

Abstract The transcription factor aryl hydrocarbon receptor nuclear translocator (ARNT)/hypoxia-inducible factor (HIF)-1β (ARNT/HIF1β) plays a key role in maintaining β-cell function and has been shown to be one of the most downregulated transcription factors in islets from patients with type 2 diabetes. We have shown a role for ARNT/HIF1β in glucose sensing and insulin secretion in vitro and no defects in in vivo glucose homeostasis. To gain a better understanding of the role of ARNT/HIF1β in the development of diabetes, we placed control (+/+/Cre) and β-cell–specific ARNT/HIF1β knockout (fl/fl/Cre) mice on a high-fat diet (HFD). Unlike the control (+/+/Cre) mice, HFD-fed fl/fl/Cre mice had no impairment in in vivo glucose tolerance. The lack of impairment in HFD-fed fl/fl/Cre mice was partly due to an improved islet glucose-stimulated NADPH/NADP+ ratio and glucose-stimulated insulin secretion. The effects of the HFD-rescued insulin secretion in fl/fl/Cre islets could be reproduced by treating low-fat diet (LFD)–fed fl/fl/Cre islets with the lipid signaling molecule 1-monoacylglcyerol. This suggests that the defects seen in LFD-fed fl/fl/Cre islet insulin secretion involve lipid signaling molecules. Overall, mice lacking ARNT/HIF1β in β-cells have altered lipid signaling in vivo and are resistant to an HFD’s ability to induce diabetes.

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