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Batdorf HM, Lawes LDL, Cassagne GA, Fontenot MS, Harvey IC, Richardson JT, Burk DH, Dupuy SD, Karlstad MD, Salbaum JM, Staszkiewicz J, Beyl R, Ghosh S, Burke SJ, Collier JJ. Accelerated onset of diabetes in non-obese diabetic mice fed a refined high-fat diet. Diabetes Obes Metab 2024. [PMID: 38433703 DOI: 10.1111/dom.15522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 02/09/2024] [Accepted: 02/11/2024] [Indexed: 03/05/2024]
Abstract
AIM Type 1 diabetes results from autoimmune events influenced by environmental variables, including changes in diet. This study investigated how feeding refined versus unrefined (aka 'chow') diets affects the onset and progression of hyperglycaemia in non-obese diabetic (NOD) mice. METHODS Female NOD mice were fed either unrefined diets or matched refined low- and high-fat diets. The onset of hyperglycaemia, glucose tolerance, food intake, energy expenditure, circulating insulin, liver gene expression and microbiome changes were measured for each dietary group. RESULTS NOD mice consuming unrefined (chow) diets developed hyperglycaemia at similar frequencies. By contrast, mice consuming the defined high-fat diet had an accelerated onset of hyperglycaemia compared to the matched low-fat diet. There was no change in food intake, energy expenditure, or physical activity within each respective dietary group. Microbiome changes were driven by diet type, with chow diets clustering similarly, while refined low- and high-fat bacterial diversity also grouped closely. In the defined dietary cohort, liver gene expression changes in high-fat-fed mice were consistent with a greater frequency of hyperglycaemia and impaired glucose tolerance. CONCLUSION Glucose intolerance is associated with an enhanced frequency of hyperglycaemia in female NOD mice fed a defined high-fat diet. Using an appropriate matched control diet is an essential experimental variable when studying changes in microbiome composition and diet as a modifier of disease risk.
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Affiliation(s)
- Heidi M Batdorf
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana, USA
| | | | | | - Molly S Fontenot
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
| | | | | | - David H Burk
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
| | - Samuel D Dupuy
- Department of Surgery, University of Tennessee Health Science Center, Graduate School of Medicine, Knoxville, Tennessee, USA
| | - Michael D Karlstad
- Department of Surgery, University of Tennessee Health Science Center, Graduate School of Medicine, Knoxville, Tennessee, USA
| | | | | | - Robbie Beyl
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
| | - Sujoy Ghosh
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
| | - Susan J Burke
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
| | - J Jason Collier
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana, USA
- Present address: Louisiana State University School of Medicine, New Orleans, LA, USA
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Clegg DJ, Tasman JG, Whiteaker EN, Mazonas TW, Salomon BJ, Dupuy SD, Goldman MH, Roberson PN. Ambulatory Status before Diabetic Foot Ulcer Development as a Predictor of Amputation and 1-Year Outcomes: A Retrospective Analysis. Plast Reconstr Surg Glob Open 2023; 11:e5383. [PMID: 37954216 PMCID: PMC10635617 DOI: 10.1097/gox.0000000000005383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 09/15/2023] [Indexed: 11/14/2023]
Abstract
Background Up to 25% of people with diabetes develop a diabetic foot ulcer (DFU) during their lifetime, which precedes approximately 85% of nontraumatic lower limb amputations. Diabetic limb salvage has been at the forefront of recent research, as major amputation is associated with 5-year mortality rates of 52%-80%. We sought to determine if ambulatory status before DFU diagnosis is predictive of amputations and outcomes within 1 year, as no studies have directly examined this relationship. Methods A retrospective review of patients diagnosed with DFUs from January 2011 to December 2021 was performed. Patients aged 18 years or more with type II diabetes were included. Ambulatory status was defined as the primary form of mobility reported by the patient before development of DFU, and was categorized as independent ambulation, ambulatory with assisting device (AWAD), or nonambulatory (NA). Statistical analyses included χ2, multinomial, and multivariable logistic regressions. Results After review, 506 patients were included. NA (OR = 5.10; P = 0.002) and AWAD status (OR = 2.77; P = 0.01) before DFU development were predictive of major (below or above-knee) amputation during hospitalization, emergency department visits within 30-days (NA: OR = 4.19; P = 0.01, AWAD: OR = 3.09; P = 0.02), and mortality within one-year (NA: OR = 4.19; P = 0.01, AWAD: OR = 3.09; P = 0.02). AWAD status was also associated with increased risk of hospital readmission (OR = 2.89; P < 0.001) within 30-days and any amputation (OR = 1.73; P = 0.01) within 1 year. Conclusions In patients with DFUs, NA and AWAD status were predictive of major amputation during hospitalization and are associated with poorer 1-year outcomes, including mortality. Ambulatory status assessment may be used to inform DFU treatment approaches.
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Affiliation(s)
- Devin J. Clegg
- From the Department of Surgery, University of Tennessee Graduate School of Medicine, Knoxville, Tenn
| | - Jordan G. Tasman
- Departments of Psychology and Surgery, University of Tennessee, Knoxville, Tenn
| | - Erica N. Whiteaker
- College of Medicine, University of Tennessee Health Science Center, Memphis, Tenn
| | - Thomas W. Mazonas
- From the Department of Surgery, University of Tennessee Graduate School of Medicine, Knoxville, Tenn
| | - Brett J. Salomon
- From the Department of Surgery, University of Tennessee Graduate School of Medicine, Knoxville, Tenn
| | - Samuel D. Dupuy
- From the Department of Surgery, University of Tennessee Graduate School of Medicine, Knoxville, Tenn
| | - Mitchell H. Goldman
- Department of Surgery, Division of Vascular & Endovascular Surgery, University of Tennessee Graduate School of Medicine, Knoxville, Tenn
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Batdorf HM, Lawes LDL, Richardson JT, Burk DH, Dupuy SD, Karlstad MD, Noland RC, Burke SJ, Collier JJ. NOD mice have distinct metabolic and immunologic profiles when compared with genetically similar MHC-matched ICR mice. Am J Physiol Endocrinol Metab 2023; 325:E336-E345. [PMID: 37610410 PMCID: PMC10642984 DOI: 10.1152/ajpendo.00033.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 08/18/2023] [Accepted: 08/18/2023] [Indexed: 08/24/2023]
Abstract
Nonobese diabetic (NOD) mice are the most commonly used rodent model to study mechanisms relevant to the autoimmunity and immunology of type 1 diabetes. Although many different strains of mice have been used as controls for studies comparing nondiabetic lines to the NOD strain, we hypothesized that the parental strain that gave rise to the NOD line might be one of the best options. Therefore, we compared female ICR and NOD mice, which are matched at key major histocompatibility complex (MHC) loci, to understand their metabolic and immunologic similarities and differences. Several novel observations emerged: 1) NOD mice have greater circulating proinsulin when compared with ICR mice. 2) NOD mice display CD3+ and IBA1+ cell infiltration into and near pancreatic islets before hyperglycemia. 3) NOD mice show increased expression of the Il1b and Cxcl11 genes in islets when compared with islets from age-matched ICR mice. 4) NOD mice have a greater abundance of STAT1 and ICAM-1 protein in islets when compared with ICR mice. These data show that ICR mice, which are genetically similar to NOD mice, do not retain the same immunologic outcomes. Thus, ICR mice are an excellent choice as a genetically similar and MHC-matched control for NOD mice in studies designed to understand mechanisms relevant to autoimmune-mediated diabetes onset as well as novel therapeutic interventions.NEW & NOTEWORTHY Nonobese diabetic (NOD) mice have more proinsulin in circulation and STAT1 protein in islets compared with the major histocompatibility complex (MHC)-matched ICR line. NOD mice also display greater expression of cytokines and chemokines in pancreatic islets consistent with immune cell infiltration before hyperglycemia when compared with age-matched ICR mice. Thus, ICR mice represent an excellent control for autoimmunity and inflammation studies using the NOD line of mice.
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Affiliation(s)
- Heidi M Batdorf
- Laboratory of Islet Biology and Inflammation, Pennington Biomedical Research Center, Baton Rouge, Louisiana, United States
| | - Luz de Luna Lawes
- Laboratory of Islet Biology and Inflammation, Pennington Biomedical Research Center, Baton Rouge, Louisiana, United States
| | - Jeremy T Richardson
- Laboratory of Islet Biology and Inflammation, Pennington Biomedical Research Center, Baton Rouge, Louisiana, United States
| | - David H Burk
- Cell Biology and Bioimaging Core Facility, Pennington Biomedical Research Center, Baton Rouge, Louisiana, United States
| | - Samuel D Dupuy
- Department of Surgery, Graduate School of Medicine, University of Tennessee Health Science Center, Knoxville, Tennessee, United States
| | - Michael D Karlstad
- Department of Surgery, Graduate School of Medicine, University of Tennessee Health Science Center, Knoxville, Tennessee, United States
| | - Robert C Noland
- Skeletal Muscle Metabolism Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana, United States
| | - Susan J Burke
- Laboratory of Immunogenetics, Pennington Biomedical Research Center, Baton Rouge, Louisiana, United States
| | - J Jason Collier
- Laboratory of Islet Biology and Inflammation, Pennington Biomedical Research Center, Baton Rouge, Louisiana, United States
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Antevska A, Long CC, Dupuy SD, Collier JJ, Karlstad MD, Do TD. Mouse Pancreatic Peptide Hormones Probed at the Sub-Single-Islet Level: The Effects of Acute Corticosterone Treatment. J Proteome Res 2023; 22:235-245. [PMID: 36412564 DOI: 10.1021/acs.jproteome.2c00668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We combine liquid chromatography coupled with ion mobility spectrometry-mass spectrometry to elucidate how short exposure to corticosterone (Cort) alters the output of mouse pancreatic islet hormones. The workflow enables the robust separation of mouse insulin 1 (Ins1) and insulin 2 (Ins2) and the detection of major islet hormones in a homogenate equivalent to 100-150 islet cells. We show that Ins2 has a unique structure and is degraded much faster than Ins1. Further investigation indicates that Ins2 may populate both T and R states, whereas Ins1 may not. The assemblies of Ins1's B-chain also introduce more structural heterogeneity than Ins2. Collectively, these features account for their unique degradation profiles, the diabetes risk associated with Ins1, and the protective effect of Ins2. In the same experiments, we observe that the ratio of amylin to Ins1 increased significantly in Cort-treated mice (15:1) compared to the control mice (42:1), correlating well with β-cell proliferation observed in immunoassays on the same animal model. We observe no increase in intact full-length insulin levels but more of the truncated forms, indicating that enzymatic activity is accelerated. Our data provide a molecular basis for reduced insulin action induced by Cort and connections between insulin turnover and insulin resistance.
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Affiliation(s)
- Aleksandra Antevska
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee37996, United States
| | - Connor C Long
- Department of Biochemistry, Cellular, and Molecular Biology, University of Tennessee, Knoxville, Tennessee37996, United States
| | - Samuel D Dupuy
- Department of Surgery, Graduate School of Medicine, University of Tennessee, Knoxville, Tennessee37996, United States
| | - J Jason Collier
- Laboratory of Islet Biology and Inflammation, Pennington Biomedical Research Center, Baton Rouge, Louisiana70808, United States
| | - Michael D Karlstad
- Department of Surgery, Graduate School of Medicine, University of Tennessee, Knoxville, Tennessee37996, United States
| | - Thanh D Do
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee37996, United States
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Martin TM, Burke SJ, Batdorf HM, Burk DH, Ghosh S, Dupuy SD, Karlstad MD, Collier JJ. ICAM-1 Abundance Is Increased in Pancreatic Islets of Hyperglycemic Female NOD Mice and Is Rapidly Upregulated by NF-κB in Pancreatic β-Cells. J Immunol 2022; 209:569-581. [PMID: 35851539 PMCID: PMC9845432 DOI: 10.4049/jimmunol.2200065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 05/24/2022] [Indexed: 01/04/2023]
Abstract
Type 1 diabetes (T1D) is classified as an autoimmune disease where pancreatic β-cells are specifically targeted by cells of the immune system. The molecular mechanisms underlying this process are not completely understood. Herein, we identified that the Icam1 gene and ICAM-1 protein were selectively elevated in female NOD mice relative to male mice, fitting with the sexual dimorphism of diabetes onset in this key mouse model of T1D. In addition, ICAM-1 abundance was greater in hyperglycemic female NOD mice than in age-matched normoglycemic female NOD mice. Moreover, we discovered that the Icam1 gene was rapidly upregulated in response to IL-1β in mouse, rat, and human islets and in 832/13 rat insulinoma cells. This early temporal genetic regulation requires key components of the NF-κB pathway and was associated with rapid recruitment of the p65 transcriptional subunit of NF-κB to corresponding κB elements within the Icam1 gene promoter. In addition, RNA polymerase II recruitment to the Icam1 gene promoter in response to IL-1β was consistent with p65 occupancy at κB elements, histone chemical modifications, and increased mRNA abundance. Thus, we conclude that β-cells undergo rapid genetic reprogramming by IL-1β to enhance expression of the Icam1 gene and that elevations in ICAM-1 are associated with hyperglycemia in NOD mice. These findings are highly relevant to, and highlight the importance of, pancreatic β-cell communication with the immune system. Collectively, these observations reveal a portion of the complex molecular events associated with onset and progression of T1D.
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Affiliation(s)
- Thomas M. Martin
- Laboratory of Islet Biology and Inflammation, Pennington Biomedical Research Center Baton Rouge LA 70808 USA
| | - Susan J. Burke
- Laboratory of Immunogenetics, Pennington Biomedical Research Center Baton Rouge LA 70808 USA
| | - Heidi M. Batdorf
- Laboratory of Islet Biology and Inflammation, Pennington Biomedical Research Center Baton Rouge LA 70808 USA
| | - David H. Burk
- Cell Biology and Bioimaging Core, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
| | - Sujoy Ghosh
- Laboratory of Computational Biology, Pennington Biomedical Research Center, Baton Rouge, LA, United States
- Centre for Computational Biology and Program in Cardiovascular and Metabolic Disorders, Duke NUS Medical School, Singapore
| | - Samuel D. Dupuy
- Department of Surgery, University of Tennessee Health Science Center, Knoxville, TN, 37920, USA
| | - Michael D. Karlstad
- Department of Surgery, University of Tennessee Health Science Center, Knoxville, TN, 37920, USA
| | - J. Jason Collier
- Laboratory of Islet Biology and Inflammation, Pennington Biomedical Research Center Baton Rouge LA 70808 USA
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Gray ALH, Antevska A, Link BA, Bogin B, Burke SJ, Dupuy SD, Collier JJ, Levine ZA, Karlstad MD, Do TD. α-CGRP disrupts amylin fibrillization and regulates insulin secretion: implications on diabetes and migraine. Chem Sci 2021; 12:5853-5864. [PMID: 34168810 PMCID: PMC8179678 DOI: 10.1039/d1sc01167g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 03/13/2021] [Indexed: 11/21/2022] Open
Abstract
Despite being relatively benign and not an indicative signature of toxicity, fibril formation and fibrillar structures continue to be key factors in assessing the structure-function relationship in protein aggregation diseases. The inability to capture molecular cross-talk among key players at the tissue level before fibril formation greatly accounts for the missing link toward the development of an efficacious therapeutic intervention for Type II diabetes mellitus (T2DM). We show that human α-calcitonin gene-related peptide (α-CGRP) remodeled amylin fibrillization. Furthermore, while CGRP and/or amylin monomers reduce the secretion of both mouse Ins1 and Ins2 proteins, CGRP oligomers have a reverse effect on Ins1. Genetically reduced Ins2, the orthologous version of human insulin, has been shown to enhance insulin sensitivity and extend the life-span in old female mice. Beyond the mechanistic insights, our data suggest that CGRP regulates insulin secretion and lowers the risk of T2DM. Our result rationalizes how migraine might be protective against T2DM. We envision the new paradigm of CGRP : amylin interactions as a pivotal aspect for T2DM diagnostics and therapeutics. Maintaining a low level of amylin while increasing the level of CGRP could become a viable approach toward T2DM prevention and treatment.
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Affiliation(s)
- Amber L H Gray
- Department of Chemistry, University of Tennessee Knoxville TN 37996 USA
| | | | - Benjamin A Link
- Department of Chemistry, University of Tennessee Knoxville TN 37996 USA
| | - Bryan Bogin
- Department of Pathology, Yale School of Medicine New Haven CT 06520 USA
- Department of Molecular Biophysics & Biochemistry, Yale University New Haven CT 0652 USA
| | - Susan J Burke
- Laboratory of Immunogenetics, Pennington Biomedical Research Center Baton Rouge LA 70808 USA
| | - Samuel D Dupuy
- Department of Surgery, Graduate School of Medicine, University of Tennessee Health Science Center Knoxville TN 37920 USA
| | - J Jason Collier
- Laboratory of Islet Biology and Inflammation, Pennington Biomedical Research Center Baton Rouge LA 70808 USA
| | - Zachary A Levine
- Department of Pathology, Yale School of Medicine New Haven CT 06520 USA
- Department of Molecular Biophysics & Biochemistry, Yale University New Haven CT 0652 USA
| | - Michael D Karlstad
- Department of Surgery, Graduate School of Medicine, University of Tennessee Health Science Center Knoxville TN 37920 USA
| | - Thanh D Do
- Department of Chemistry, University of Tennessee Knoxville TN 37996 USA
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