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Zhao Y, Ansarullah, Kumar P, Mahoney JM, He H, Baker C, George J, Li S. Causal network perturbation analysis identifies known and novel type-2 diabetes driver genes. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.22.595431. [PMID: 38826370 PMCID: PMC11142180 DOI: 10.1101/2024.05.22.595431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
The molecular pathogenesis of diabetes is multifactorial, involving genetic predisposition and environmental factors that are not yet fully understood. However, pancreatic β-cell failure remains among the primary reasons underlying the progression of type-2 diabetes (T2D) making targeting β-cell dysfunction an attractive pathway for diabetes treatment. To identify genetic contributors to β-cell dysfunction, we investigated single-cell gene expression changes in β-cells from healthy (C57BL/6J) and diabetic (NZO/HlLtJ) mice fed with normal or high-fat, high-sugar diet (HFHS). Our study presents an innovative integration of the causal network perturbation assessment (ssNPA) framework with meta- cell transcriptome analysis to explore the genetic underpinnings of type-2 diabetes (T2D). By generating a reference causal network and in silico perturbation, we identified novel genes implicated in T2D and validated our candidates using the Knockout Mouse Phenotyping (KOMP) Project database.
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Wang S, Pan X, Jia B, Chen S. Exploring the Correlation Between the Systemic Immune Inflammation Index (SII), Systemic Inflammatory Response Index (SIRI), and Type 2 Diabetic Retinopathy. Diabetes Metab Syndr Obes 2023; 16:3827-3836. [PMID: 38033457 PMCID: PMC10683512 DOI: 10.2147/dmso.s437580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 11/18/2023] [Indexed: 12/02/2023] Open
Abstract
Purpose Systemic immune inflammation index (SII), systemic inflammatory response index (SIRI) are new inflammation indicators calculated after integrating multiple indicators in blood routine. This study aims to investigate the correlation between the SII, SIRI and type 2 diabetic retinopathy (T2DR) and the diagnostic significance of these indices in T2DR. Patients and Methods A retrospective analysis involved 500 patients diagnosed with type 2 diabetes (T2DM), categorized into two groups based on fundus examination results: the non-diabetic retinopathy group (NDR, n=256) and the diabetic retinopathy group (DR, n=244). We calculated SII and SIRI, and analyzed their associations with T2DR. Results The DR group exhibited significantly higher SII and SIRI values compared to the NDR group (P<0.001). Mantel-Haenszel's chi-square trend analysis revealed a notable linear trend (P<0.001) between SII, SIRI, and DR. SII and SIRI exhibited moderate positive correlations with DR, (r=0.354, P<0.001; r=0.469, P<0.001), respectively. Binary logistic regression analysis identified SII and SIRI as independent risk factors for DR. Restrictive cubic spline analysis demonstrated a significant linear relationship between SII and DR (P total trend <0.001, P nonlinear = 0.0657). Stratification by gender indicated that SII is more sensitive to the onset of DR in men. A significant nonlinear relationship was observed between SIRI and DR (P total trend <0.001, P nonlinear = 0.0025), with no gender-related differences in SIRI's association with DR. ROC curve analysis demonstrated that the combined use of SII and SIRI achieved the highest diagnostic accuracy for DR, with an AUC of 0.782, 74.6% sensitivity, and 69.9% specificity. Conclusion Our findings suggested that SII and SIRI as independent risk factors for DR. The high accuracy of SII combined with SIRI in diagnosing DR underscores their potential as early biological indicators for DR diagnosis.
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Affiliation(s)
- Shuqi Wang
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, People’s Republic of China
- Department of Endocrinology, Hebei General Hospital, Shijiazhuang, People’s Republic of China
| | - Xiaoyu Pan
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, People’s Republic of China
- Department of Endocrinology, Hebei General Hospital, Shijiazhuang, People’s Republic of China
| | - Boying Jia
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, People’s Republic of China
- Department of Endocrinology, Hebei General Hospital, Shijiazhuang, People’s Republic of China
| | - Shuchun Chen
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, People’s Republic of China
- Department of Endocrinology, Hebei General Hospital, Shijiazhuang, People’s Republic of China
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Tarfeen N, Nisa KU, Ahmad MB, Waza AA, Ganai BA. Metabolic and Genetic Association of Vitamin D with Calcium Signaling and Insulin Resistance. Indian J Clin Biochem 2023; 38:407-417. [PMID: 37746541 PMCID: PMC10516840 DOI: 10.1007/s12291-022-01105-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 11/29/2022] [Indexed: 12/14/2022]
Abstract
Various evidences have unveiled the significance of Vitamin D in diverse processes which include its action in prevention of immune dysfunction, cancer and cardiometabolic disorders. Studies have confirmed the function of VD in controlling the expression of approximately nine hundred genes including gene expression of insulin. VD insufficiency may be linked with the pathogenesis of diseases that are associated with insulin resistance (IR) including diabetes as well as obesity. Thus, VD lowers IR-related disorders such as inflammation and oxidative stress. This review provides an insight regarding the molecular mechanism manifesting, how insufficiency of VD may be connected with the IR and diabetes. It also discusses the effect of VD in maintaining the Ca2+ levels in beta cells of the pancreas and in the tissues that are responsive to insulin.
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Affiliation(s)
- Najeebul Tarfeen
- Centre of Research for Development, University of Kashmir, Srinagar, India
| | - Khair Ul Nisa
- Department of Environmental Science, University of Kashmir, Srinagar, India
| | - Mir Bilal Ahmad
- Department of Biochemistry, University of Kashmir, Srinagar, India
| | - Ajaz Ahmad Waza
- Multidisciplinary Research Unit (MRU), Government Medical Collage (GMC) Srinagar, Srinagar, J & K 190010 India
| | - Bashir Ahmad Ganai
- Centre of Research for Development, University of Kashmir, Srinagar, India
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Ramanadham S, Turk J, Bhatnagar S. Noncanonical Regulation of cAMP-Dependent Insulin Secretion and Its Implications in Type 2 Diabetes. Compr Physiol 2023; 13:5023-5049. [PMID: 37358504 PMCID: PMC10809800 DOI: 10.1002/cphy.c220031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
Abstract
Impaired glucose tolerance (IGT) and β-cell dysfunction in insulin resistance associated with obesity lead to type 2 diabetes (T2D). Glucose-stimulated insulin secretion (GSIS) from β-cells occurs via a canonical pathway that involves glucose metabolism, ATP generation, inactivation of K ATP channels, plasma membrane depolarization, and increases in cytosolic concentrations of [Ca 2+ ] c . However, optimal insulin secretion requires amplification of GSIS by increases in cyclic adenosine monophosphate (cAMP) signaling. The cAMP effectors protein kinase A (PKA) and exchange factor activated by cyclic-AMP (Epac) regulate membrane depolarization, gene expression, and trafficking and fusion of insulin granules to the plasma membrane for amplifying GSIS. The widely recognized lipid signaling generated within β-cells by the β-isoform of Ca 2+ -independent phospholipase A 2 enzyme (iPLA 2 β) participates in cAMP-stimulated insulin secretion (cSIS). Recent work has identified the role of a G-protein coupled receptor (GPCR) activated signaling by the complement 1q like-3 (C1ql3) secreted protein in inhibiting cSIS. In the IGT state, cSIS is attenuated, and the β-cell function is reduced. Interestingly, while β-cell-specific deletion of iPLA 2 β reduces cAMP-mediated amplification of GSIS, the loss of iPLA 2 β in macrophages (MØ) confers protection against the development of glucose intolerance associated with diet-induced obesity (DIO). In this article, we discuss canonical (glucose and cAMP) and novel noncanonical (iPLA 2 β and C1ql3) pathways and how they may affect β-cell (dys)function in the context of impaired glucose intolerance associated with obesity and T2D. In conclusion, we provide a perspective that in IGT states, targeting noncanonical pathways along with canonical pathways could be a more comprehensive approach for restoring β-cell function in T2D. © 2023 American Physiological Society. Compr Physiol 13:5023-5049, 2023.
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Affiliation(s)
- Sasanka Ramanadham
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Alabama, USA
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Alabama, USA
| | - John Turk
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Sushant Bhatnagar
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Alabama, USA
- Department of Medicine, University of Alabama at Birmingham, Alabama, USA
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5
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Yu W, Xie D, Yamamoto T, Koyama H, Cheng J. Mechanistic insights of soluble uric acid-induced insulin resistance: Insulin signaling and beyond. Rev Endocr Metab Disord 2023; 24:327-343. [PMID: 36715824 DOI: 10.1007/s11154-023-09787-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/10/2023] [Indexed: 01/31/2023]
Abstract
Hyperuricemia is a metabolic disease caused by purine nucleotide metabolism disorder. The prevalence of hyperuricemia is increasing worldwide, with a growing trend in the younger populations. Although numerous studies have indicated that hyperuricemia may be an independent risk factor for insulin resistance, the causal relationship between the two is controversial. There are few reviews, however, focusing on the relationship between uric acid (UA) and insulin resistance from experimental studies. In this review, we summarized the experimental models related to soluble UA-induced insulin resistance in pancreas and peripheral tissues, including skeletal muscles, adipose tissue, liver, heart/cardiomyocytes, vascular endothelial cells and macrophages. In addition, we summarized the research advances about the key mechanism of UA-induced insulin resistance. Moreover, we attempt to identify novel targets for the treatment of hyperuricemia-related insulin resistance. Lastly, we hope that the present review will encourage further researches to solve the chicken-and-egg dilemma between UA and insulin resistance, and provide strategies for the pathogenesis and treatment of hyperuricemia related metabolic diseases.
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Affiliation(s)
- Wei Yu
- Department of Endocrinology, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - De Xie
- Department of Endocrinology, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Tetsuya Yamamoto
- Health Evaluation Center, Osaka Gyoumeikan Hospital, Osaka, Japan
| | - Hidenori Koyama
- Department of Diabetes, Endocrinology and Clinical Immunology, Hyogo Medical University, Nishinomiya, Hyogo, Japan
| | - Jidong Cheng
- Department of Endocrinology, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China.
- Department of Diabetes, Endocrinology and Clinical Immunology, Hyogo Medical University, Nishinomiya, Hyogo, Japan.
- Xiamen Key Laboratory of Translational Medicine for Nucleic Acid Metabolism and Regulation, Xiamen, Fujian, China.
- Department of Endocrinology, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361102, Fujian, People's Republic of China.
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Martínez-López YE, Esquivel-Hernández DA, Sánchez-Castañeda JP, Neri-Rosario D, Guardado-Mendoza R, Resendis-Antonio O. Type 2 diabetes, gut microbiome, and systems biology: A novel perspective for a new era. Gut Microbes 2022; 14:2111952. [PMID: 36004400 PMCID: PMC9423831 DOI: 10.1080/19490976.2022.2111952] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The association between the physio-pathological variables of type 2 diabetes (T2D) and gut microbiota composition suggests a new avenue to track the disease and improve the outcomes of pharmacological and non-pharmacological treatments. This enterprise requires new strategies to elucidate the metabolic disturbances occurring in the gut microbiome as the disease progresses. To this end, physiological knowledge and systems biology pave the way for characterizing microbiota and identifying strategies in a move toward healthy compositions. Here, we dissect the recent associations between gut microbiota and T2D. In addition, we discuss recent advances in how drugs, diet, and exercise modulate the microbiome to favor healthy stages. Finally, we present computational approaches for disentangling the metabolic activity underlying host-microbiota codependence. Altogether, we envision that the combination of physiology and computational modeling of microbiota metabolism will drive us to optimize the diagnosis and treatment of T2D patients in a personalized way.
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Affiliation(s)
- Yoscelina Estrella Martínez-López
- Human Systems Biology Laboratory. Instituto Nacional de Medicina Genómica (INMEGEN). México City, México,Programa de Doctorado en Ciencias Médicas, Odontológicas y de la Salud, Universidad Nacional Autónoma de México (UNAM). Ciudad de México, México,Metabolic Research Laboratory, Department of Medicine and Nutrition. University of Guanajuato. León, Guanajuato, México
| | | | - Jean Paul Sánchez-Castañeda
- Human Systems Biology Laboratory. Instituto Nacional de Medicina Genómica (INMEGEN). México City, México,Programa de Maestría en Ciencias Bioquímicas, Universidad Nacional Autónoma de México (UNAM). Ciudad de México, México
| | - Daniel Neri-Rosario
- Human Systems Biology Laboratory. Instituto Nacional de Medicina Genómica (INMEGEN). México City, México,Programa de Maestría en Ciencias Bioquímicas, Universidad Nacional Autónoma de México (UNAM). Ciudad de México, México
| | - Rodolfo Guardado-Mendoza
- Metabolic Research Laboratory, Department of Medicine and Nutrition. University of Guanajuato. León, Guanajuato, México,Research Department, Hospital Regional de Alta Especialidad del Bajío. León, Guanajuato, México,Rodolfo Guardado-Mendoza Metabolic Research Laboratory, Department of Medicine and Nutrition. University of Guanajuato. León, Guanajuato, México
| | - Osbaldo Resendis-Antonio
- Human Systems Biology Laboratory. Instituto Nacional de Medicina Genómica (INMEGEN). México City, México,Coordinación de la Investigación Científica – Red de Apoyo a la Investigación, Universidad Nacional Autónoma de México (UNAM). Ciudad de México, México,CONTACT Osbaldo Resendis-Antonio Centro de Ciencias de la Complejidad, Universidad Nacional Autónoma de México (UNAM), Periferico Sur 4809, Arenal Tepepan, Tlalpan, 14610 Ciudad de México, CDMX
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Reducing the Damage of Ox-LDL/LOX-1 Pathway to Vascular Endothelial Barrier Can Inhibit Atherosclerosis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:7541411. [PMID: 35391927 PMCID: PMC8983252 DOI: 10.1155/2022/7541411] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 03/11/2022] [Indexed: 11/17/2022]
Abstract
Aim The destruction of the vascular endothelial barrier mediated by Ox-LDL is the initial link to atherosclerosis. Here, we aimed to determine whether the immunological intervention with Ox-ApoB polypeptide fragment (Ox-ApoB-PF) can block the deposition of Ox-LDL in vascular endothelial cells through LOX-1 receptors, thereby protecting the barrier function and survival status of vascular endothelial cells and inhibiting the progression of atherosclerosis. Methods and Results In order to determine the harm of Ox-LDL to vascular endothelial cells and the protective effect of immune intervention with Ox-ApoB-PF, we conducted a series of corresponding experiments in vitro and in vivo. The in vitro results showed that Ox-LDL can activate endothelial cell apoptosis pathway; reduce the expression of endothelial junction proteins; affect the migration, deformation, and forming ability; and ultimately destroy the vascular endothelial barrier function. The increased permeability of endothelial cells led to a sharp increase in the phagocytosis of Ox-LDL by macrophages under the endothelial layer. Meanwhile, Ox-LDL stimulation induced a significant upregulation of LOX-1 in endothelial cells and increased the expression of endothelial cell chemokines and adhesion factors. Ox-ApoB-PF antibodies can significantly reduce the abovementioned harmful effects. The in vivo results showed that active immune intervention through Ox-ApoB-PF can protect the endothelial barrier function; reduce macrophage deposition and the inflammatory response in plaques; alleviate lipid deposition in the plaques, as well as apoptosis and necrosis; and increase the ability of liver macrophages to clear Ox-LDL. Eventually, the progression of plaque and the formation of necrotic cores in plaques can be inhibited. Conclusions An Ox-ApoB-PF antibody may protect the endothelial cell physiological function and survival status by blocking the combination of Ox-LDL/LOX-1 in vascular endothelial cells. Immune intervention with Ox-ApoB-PF inhibits the occurrence and development of atherosclerotic lesions by protecting the vascular endothelial barrier function.
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8
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Thromboinflammatory Processes at the Nexus of Metabolic Dysfunction and Prostate Cancer: The Emerging Role of Periprostatic Adipose Tissue. Cancers (Basel) 2022; 14:cancers14071679. [PMID: 35406450 PMCID: PMC8996963 DOI: 10.3390/cancers14071679] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 03/03/2022] [Accepted: 03/04/2022] [Indexed: 02/07/2023] Open
Abstract
Simple Summary As overweight and obesity increase among the population worldwide, a parallel increase in the number of individuals diagnosed with prostate cancer was observed. There appears to be a relationship between both diseases where the increase in the mass of fat tissue can lead to inflammation. Such a state of inflammation could produce many factors that increase the aggressiveness of prostate cancer, especially if this inflammation occurred in the fat stores adjacent to the prostate. Another important observation that links obesity, fat tissue inflammation, and prostate cancer is the increased production of blood clotting factors. In this article, we attempt to explain the role of these latter factors in the effect of increased body weight on the progression of prostate cancer and propose new ways of treatment that act by affecting how these clotting factors work. Abstract The increased global prevalence of metabolic disorders including obesity, insulin resistance, metabolic syndrome and diabetes is mirrored by an increased incidence of prostate cancer (PCa). Ample evidence suggests that these metabolic disorders, being characterized by adipose tissue (AT) expansion and inflammation, not only present as risk factors for the development of PCa, but also drive its increased aggressiveness, enhanced progression, and metastasis. Despite the emerging molecular mechanisms linking AT dysfunction to the various hallmarks of PCa, thromboinflammatory processes implicated in the crosstalk between these diseases have not been thoroughly investigated. This is of particular importance as both diseases present states of hypercoagulability. Accumulating evidence implicates tissue factor, thrombin, and active factor X as well as other players of the coagulation cascade in the pathophysiological processes driving cancer development and progression. In this regard, it becomes pivotal to elucidate the thromboinflammatory processes occurring in the periprostatic adipose tissue (PPAT), a fundamental microenvironmental niche of the prostate. Here, we highlight key findings linking thromboinflammation and the pleiotropic effects of coagulation factors and their inhibitors in metabolic diseases, PCa, and their crosstalk. We also propose several novel therapeutic targets and therapeutic interventions possibly modulating the interaction between these pathological states.
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Keeter WC, Ma S, Stahr N, Moriarty AK, Galkina EV. Atherosclerosis and multi-organ-associated pathologies. Semin Immunopathol 2022; 44:363-374. [PMID: 35238952 PMCID: PMC9069968 DOI: 10.1007/s00281-022-00914-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 01/13/2022] [Indexed: 12/31/2022]
Abstract
Atherosclerosis is a chronic inflammatory disease of the vascular system that is characterized by the deposition of modified lipoproteins, accumulation of immune cells, and formation of fibrous tissue within the vessel wall. The disease occurs in vessels throughout the body and affects the functions of almost all organs including the lymphoid system, bone marrow, heart, brain, pancreas, adipose tissue, liver, kidneys, and gastrointestinal tract. Atherosclerosis and associated factors influence these tissues via the modulation of local vascular functions, induction of cholesterol-associated pathologies, and regulation of local immune responses. In this review, we discuss how atherosclerosis interferers with functions of different organs via several common pathways and how the disturbance of immunity in atherosclerosis can result in disease-provoking dysfunctions in multiple tissues. Our growing appreciation of the implication of atherosclerosis and associated microenvironmental conditions in the multi-organ pathology promises to influence our understanding of CVD-associated disease pathologies and to provide new therapeutic opportunities.
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Affiliation(s)
- W Coles Keeter
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, 700 West Olney Rd, Norfolk, VA, 23507, USA
| | - Shelby Ma
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, 700 West Olney Rd, Norfolk, VA, 23507, USA
| | - Natalie Stahr
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, 700 West Olney Rd, Norfolk, VA, 23507, USA
| | - Alina K Moriarty
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, 700 West Olney Rd, Norfolk, VA, 23507, USA
| | - Elena V Galkina
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, 700 West Olney Rd, Norfolk, VA, 23507, USA.
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Jiao Y, Su Y, Shen J, Hou X, Li Y, Wang J, Liu B, Qiu D, Sun Z, Chen Y, Xi Q, Shen M, Fu Z. Evaluation of the long-term prognostic ability of triglyceride-glucose index for elderly acute coronary syndrome patients: a cohort study. Cardiovasc Diabetol 2022; 21:3. [PMID: 34991602 PMCID: PMC8740408 DOI: 10.1186/s12933-021-01443-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 12/29/2021] [Indexed: 12/13/2022] Open
Abstract
Background With the advancement of the world population aging, more attention should be paid to the prognosis of elderly patients with acute coronary syndrome (ACS). Triglyceride-glucose (TyG) index is a reliable indicator of insulin resistance (IR) and is closely related to traditional risk factors of cardiovascular disease (CVD). However, the effect of TyG index on the prognosis of long-term adverse events in elderly ACS patients has not been reported. This study evaluated the prognostic power of TyG index in predicting adverse events in elderly ACS patients. Methods In this study, 662 ACS patients > 80 years old who were hospitalized from January 2006 to December 2012 were enrolled consecutively and the general clinical data and baseline blood biochemical indicators were collected. The follow-up time after discharge was 40–120 months (median, 63 months; interquartile range, 51‒74 months). In addition, the following formula was used to calculate the TyG index: Ln [fasting TG (mg/dL) × FBG (mg/dL)/2], and patients were divided into three groups according to the tertile of the TyG index. Results The mean age of the subjects was 81.87 ± 2.14 years, the proportion of females was 28.10%, and the mean TyG index was 8.76 ± 0.72. The TyG index was closely associated with the traditional risk factors of CVD. In the fully-adjusted Cox regression model, the Hazard ratio (95% CI) of all-cause mortality (in tertile 3) was 1.64 (1.06, 2.54) and major adverse cardiac event (MACE) (in tertile 3) was 1.36 (1.05, 1.95) for each SD increase in the TyG index. The subgroup analyses also confirmed the significant association of the TyG index and long-term prognosis. Conclusion The TyG index is an independent predictor of long-term all-cause mortality and MACE in elderly ACS patients.
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Affiliation(s)
- Yang Jiao
- Senior Department of Cardiology, The Sixth Medical Center, Chinese PLA General Hospital and Chinese PLA Medical School, Beijing, 100853, China
| | - Yongkang Su
- Senior Department of Cardiology, The Sixth Medical Center, Chinese PLA General Hospital and Chinese PLA Medical School, Beijing, 100853, China.,Department of Geriatrics, The Second Medical Center, Chinese PLA General Hospital, Beijing, 100853, China
| | - Jian Shen
- Senior Department of Cardiology, The Sixth Medical Center, Chinese PLA General Hospital and Chinese PLA Medical School, Beijing, 100853, China
| | - Xiaoling Hou
- Senior Department of Cardiology, The Sixth Medical Center, Chinese PLA General Hospital and Chinese PLA Medical School, Beijing, 100853, China
| | - Ying Li
- Senior Department of Cardiology, The Sixth Medical Center, Chinese PLA General Hospital and Chinese PLA Medical School, Beijing, 100853, China
| | - Jihang Wang
- Senior Department of Cardiology, The Sixth Medical Center, Chinese PLA General Hospital and Chinese PLA Medical School, Beijing, 100853, China.,Department of Cardiology, Hainan Hospital, Chinese PLA General Hospital, Sanya, 572000, Hainan, China
| | - Bing Liu
- Senior Department of Cardiology, The Sixth Medical Center, Chinese PLA General Hospital and Chinese PLA Medical School, Beijing, 100853, China.,Department of Cardiology, 970 Hospital, Chinese PLA Joint Logistic Support Force, Weihai, 264200, Shandong, China
| | - Dongfeng Qiu
- Senior Department of Cardiology, The Sixth Medical Center, Chinese PLA General Hospital and Chinese PLA Medical School, Beijing, 100853, China
| | - Zhijun Sun
- Senior Department of Cardiology, The Sixth Medical Center, Chinese PLA General Hospital and Chinese PLA Medical School, Beijing, 100853, China
| | - Yundai Chen
- Senior Department of Cardiology, The Sixth Medical Center, Chinese PLA General Hospital and Chinese PLA Medical School, Beijing, 100853, China
| | - Qing Xi
- The First Medical Center, Chinese PLA General Hospital, Beijing, 100853, China
| | - Mingzhi Shen
- Department of Cardiology, Hainan Hospital, Chinese PLA General Hospital, Sanya, 572000, Hainan, China.
| | - Zhenhong Fu
- Senior Department of Cardiology, The Sixth Medical Center, Chinese PLA General Hospital and Chinese PLA Medical School, Beijing, 100853, China.
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Reeves AR, Sansbury BE, Pan M, Han X, Spite M, Greenberg AS. Myeloid-Specific Deficiency of Long-Chain Acyl CoA Synthetase 4 Reduces Inflammation by Remodeling Phospholipids and Reducing Production of Arachidonic Acid-Derived Proinflammatory Lipid Mediators. THE JOURNAL OF IMMUNOLOGY 2021; 207:2744-2753. [PMID: 34725110 DOI: 10.4049/jimmunol.2100393] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 09/14/2021] [Indexed: 12/19/2022]
Abstract
In response to infection or tissue damage, resident peritoneal macrophages (rpMACs) produce inflammatory lipid mediators from the polyunsaturated fatty acid (PUFA), arachidonic acid (AA). Long-chain acyl-CoA synthetase 4 (ACSL4) catalyzes the covalent addition of a CoA moiety to fatty acids, with a strong preference for AA and other PUFAs containing three or more double bonds. PUFA-CoA can be incorporated into phospholipids, which is the source of PUFA for lipid mediator synthesis. In this study, we demonstrated that deficiency of Acsl4 in mouse rpMACs resulted in a significant reduction of AA incorporated into all phospholipid classes and a reciprocal increase in incorporation of oleic acid and linoleic acid. After stimulation with opsonized zymosan (opZym), a diverse array of AA-derived lipid mediators, including leukotrienes, PGs, hydroxyeicosatetraenoic acids, and lipoxins, were produced and were significantly reduced in Acsl4-deficient rpMACs. The Acsl4-deficient rpMACs stimulated with opZym also demonstrated an acute reduction in mRNA expression of the inflammatory cytokines, Il6, Ccl2, Nos2, and Ccl5 When Acsl4-deficient rpMACs were incubated in vitro with the TLR4 agonist, LPS, the levels of leukotriene B4 and PGE2 were also significantly decreased. In LPS-induced peritonitis, mice with myeloid-specific Acsl4 deficiency had a significant reduction in leukotriene B4 and PGE2 levels in peritoneal exudates, which was coupled with reduced infiltration of neutrophils in the peritoneal cavity as compared with wild-type mice. Our data demonstrate that chronic deficiency of Acsl4 in rpMACs reduces the incorporation of AA into phospholipids, which reduces lipid mediator synthesis and inflammation.
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Affiliation(s)
- Andrew R Reeves
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA
| | - Brian E Sansbury
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; and
| | - Meixia Pan
- Barshop Institute for Longevity and Aging Research, University of Texas Health Science Center at San Antonio, San Antonio, TX
| | - Xianlin Han
- Barshop Institute for Longevity and Aging Research, University of Texas Health Science Center at San Antonio, San Antonio, TX
| | - Matthew Spite
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; and
| | - Andrew S Greenberg
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA;
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12
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Bakbak E, Terenzi DC, Trac JZ, Teoh H, Quan A, Glazer SA, Rotstein OD, Al-Omran M, Verma S, Hess DA. Lessons from bariatric surgery: Can increased GLP-1 enhance vascular repair during cardiometabolic-based chronic disease? Rev Endocr Metab Disord 2021; 22:1171-1188. [PMID: 34228302 DOI: 10.1007/s11154-021-09669-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/23/2021] [Indexed: 02/06/2023]
Abstract
Type 2 diabetes (T2D) and obesity represent entangled pandemics that accelerate the development of cardiovascular disease (CVD). Given the immense burden of CVD in society, non-invasive prevention and treatment strategies to promote cardiovascular health are desperately needed. During T2D and obesity, chronic dysglycemia and abnormal adiposity result in systemic oxidative stress and inflammation that deplete the vascular regenerative cell reservoir in the bone marrow that impairs blood vessel repair and exacerbates the penetrance of CVD co-morbidities. This novel translational paradigm, termed 'regenerative cell exhaustion' (RCE), can be detected as the depletion and dysfunction of hematopoietic and endothelial progenitor cell lineages in the peripheral blood of individuals with established T2D and/or obesity. The reversal of vascular RCE has been observed after administration of the sodium-glucose cotransporter-2 inhibitor (SGLT2i), empagliflozin, or after bariatric surgery for severe obesity. In this review, we explore emerging evidence that links improved dysglycemia to a reduction in systemic oxidative stress and recovery of circulating pro-vascular progenitor cell content required for blood vessel repair. Given that bariatric surgery consistently increases systemic glucagon-like-peptide 1 (GLP-1) release, we also focus on evidence that the use of GLP-1 receptor agonists (GLP-1RA) during obesity may act to inhibit the progression of systemic dysglycemia and adiposity, and indirectly reduce inflammation and oxidative stress, thereby limiting the impact of RCE. Therefore, therapeutic intervention with currently-available GLP-1RA may provide a less-invasive modality to reverse RCE, bolster vascular repair mechanisms, and improve cardiometabolic risk in individuals living with T2D and obesity.
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Affiliation(s)
- Ehab Bakbak
- Division of Cardiac Surgery, St. Michael's Hospital, Toronto, ON, Canada
- Keenan Research Centre for Biomedical Science and Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
| | - Daniella C Terenzi
- Division of Cardiac Surgery, St. Michael's Hospital, Toronto, ON, Canada
- Keenan Research Centre for Biomedical Science and Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
- Institute of Medical Science, University of Toronto, Toronto, ON, Canada
| | - Justin Z Trac
- Division of Cardiac Surgery, St. Michael's Hospital, Toronto, ON, Canada
- Keenan Research Centre for Biomedical Science and Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
| | - Hwee Teoh
- Division of Cardiac Surgery, St. Michael's Hospital, Toronto, ON, Canada
- Division of Endocrinology and Metabolism, St. Michael's Hospital, Toronto, ON, Canada
- Keenan Research Centre for Biomedical Science and Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
| | - Adrian Quan
- Division of Cardiac Surgery, St. Michael's Hospital, Toronto, ON, Canada
- Keenan Research Centre for Biomedical Science and Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
| | - Stephen A Glazer
- Department of Internal Medicine, Humber River Hospital, Toronto, ON, Canada
- Division of Endocrinology and Metabolism, Queen's University, Kingston, ON, Canada
| | - Ori D Rotstein
- Division of Endocrinology and Metabolism, St. Michael's Hospital, Toronto, ON, Canada
- Keenan Research Centre for Biomedical Science and Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
- Institute of Medical Science, University of Toronto, Toronto, ON, Canada
| | - Mohammed Al-Omran
- Division of Vascular Surgery, St. Michael's Hospital, Toronto, ON, Canada
- Keenan Research Centre for Biomedical Science and Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
- Institute of Medical Science, University of Toronto, Toronto, ON, Canada
- Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Subodh Verma
- Division of Cardiac Surgery, St. Michael's Hospital, Toronto, ON, Canada
- Keenan Research Centre for Biomedical Science and Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
- Institute of Medical Science, University of Toronto, Toronto, ON, Canada
- Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - David A Hess
- Division of Cardiac Surgery, St. Michael's Hospital, Toronto, ON, Canada.
- Keenan Research Centre for Biomedical Science and Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada.
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada.
- Molecular Medicine Research Laboratories, Robarts Research Institute, London, ON, Canada.
- Department of Physiology and Pharmacology, Western University, London, ON, Canada.
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13
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Yeo HJ, Shin MJ, Kim DW, Kwon HY, Eum WS, Choi SY. Tat-CIAPIN1 protein prevents against cytokine-induced cytotoxicity in pancreatic RINm5F β-cells. BMB Rep 2021. [PMID: 34120676 PMCID: PMC8505229 DOI: 10.5483/bmbrep.2021.54.9.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cytokines activate inflammatory signals and are major mediators in progressive β-cell damage, which leads to type 1 diabetes mellitus. We recently showed that the cell-permeable Tat-CIAPIN1 fusion protein inhibits neuronal cell death induced by oxidative stress. However, how the Tat-CIAPIN1 protein affects cytokine-induced β-cell damage has not been investigated yet. Thus, we assessed whether the Tat-CIAPIN1 protein can protect RINm5F β-cells against cytokine-induced cytotoxicity. In cytokine-exposed RINm5F β-cells, the transduced Tat-CIAPIN1 protein elevated cell survivals and reduced reactive oxygen species (ROS) and DNA fragmentation levels. The Tat-CIAPIN1 protein reduced mitogen-activated protein kinases (MAPKs) and NF-κB activation levels and elevated Bcl-2 protein, whereas Bax and cleaved Caspase-3 proteins were decreased by this fusion protein. Thus, the protection of RINm5F β-cells by the Tat-CIAPIN1 protein against cytokine-induced cytotoxicity can suggest that the Tat-CIAPIN1 protein might be used as a therapeutic inhibitor against RINm5F β-cell damage.
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Affiliation(s)
- Hyeon Ji Yeo
- Department of Biomedical Science and Research Institute of Bioscience and Biotechnology, Hallym University, Chuncheon 24252, Korea
| | - Min Jea Shin
- Department of Biomedical Science and Research Institute of Bioscience and Biotechnology, Hallym University, Chuncheon 24252, Korea
| | - Dae Won Kim
- Department of Biochemistry and Molecular Biology, Research Institute of Oral Sciences, College of Dentistry, Gangneung-Wonju National University, Gangneung 25457, Korea
| | - Hyeok Yil Kwon
- Department of Physiology, College of Medicine, Hallym University, Chuncheon 24252, Korea
| | - Won Sik Eum
- Department of Biomedical Science and Research Institute of Bioscience and Biotechnology, Hallym University, Chuncheon 24252, Korea
| | - Soo Young Choi
- Department of Biomedical Science and Research Institute of Bioscience and Biotechnology, Hallym University, Chuncheon 24252, Korea
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14
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Esteves Lima RP, Atanazio ARS, Costa FO, Cunha FA, Abreu LG. IMPACT OF NON-SURGICAL PERIODONTAL TREATMENT ON SERUM TNF-α LEVELS IN INDIVIDUALS WITH TYPE 2 DIABETES: A SYSTEMATIC REVIEW AND META-ANALYSIS. J Evid Based Dent Pract 2021; 21:101546. [PMID: 34391555 DOI: 10.1016/j.jebdp.2021.101546] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 02/28/2021] [Accepted: 03/13/2021] [Indexed: 12/29/2022]
Abstract
OBJECTIVE The objective of this systematic review and meta-analysis was to search for scientific evidence on the impact of non-surgical periodontal therapy on tumor necrosis factor alpha (TNF-α) in type 2 diabetics. METHODS The Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement has been followed. The study was registered (CRD42020192790) in the International prospective register of systematic reviews. Searches were conducted in five databases. Restrictions on publication date were not imposed in anyway. The studies reporting the serum TNF-α levels of individuals with type 2 diabetes mellitus (DM) before and after non-surgical periodontal therapy were included. Studies' selection, extraction of data and risk of bias assessment were performed in duplicate. Consensus was achieved. Meta-analysis was carried out. The 95% confidence interval and odds ratio were provided. RESULTS Six hundred and twenty-three references were retrieved and eighteen studies were included. Meta-analysis demonstrated that the serum levels of TNF-α in individuals with type 2 DM decreased six months after non-surgical periodontal therapy (mean difference = -1.90, confidence interval = -3.05--0.74). Included studies presented low risk of bias. CONCLUSION Non-surgical periodontal therapy has an impact on serum TNF-α levels at six months in type 2 DM patients.
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Affiliation(s)
- Rafael Paschoal Esteves Lima
- Division of Periodontology, The Dental School, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, Minas Gerais, Brazil.
| | - Andressa Rafaela Silva Atanazio
- Division of Periodontology, The Dental School, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Fernando Oliveira Costa
- Division of Periodontology, The Dental School, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Fabiano Araújo Cunha
- Division of Periodontology, The Dental School, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Lucas Guimarães Abreu
- Division of Pediatric Dentistry, The Dental School, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, Minas Gerais, Brazil
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15
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Jeon J, Kim J. Dipstick proteinuria and risk of type 2 diabetes mellitus: a nationwide population-based cohort study. J Transl Med 2021; 19:271. [PMID: 34174896 PMCID: PMC8235563 DOI: 10.1186/s12967-021-02934-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 06/09/2021] [Indexed: 12/17/2022] Open
Abstract
Background Proteinuria has been recognized as a marker of systemic inflammation and endothelial dysfunction associated with insulin resistance and β-cell impairment, which can contribute to the development of type 2 diabetes mellitus (T2DM). However, it is unknown whether the dipstick proteinuria test has a predictive value for new-onset T2DM. Methods This retrospective cohort study analyzed 239,287 non-diabetic participants who participated in the Korean nationwide health screening program in 2009–2010. Proteinuria was determined by the urine dipstick test at the baseline health screening. We performed multivariate Cox proportional regression analyses for the development of new-onset T2DM. Follow-up was performed until December 2015. Results During the mean follow-up period of 5.73 years, 22,215 participants were diagnosed with new-onset T2DM. The presence of proteinuria was significantly associated with an increased risk of T2DM (adjusted hazard ratio: 1.19, 95% confidence interval: 1.10, 1.29). There was a positive dose–response relationship between the degree of dipstick proteinuria and T2DM risk. This significant association between proteinuria and T2DM risk was consistent regardless of the fasting glucose level at baseline. Conclusions Dipstick proteinuria is a significant risk factor for new-onset T2DM. Therefore, proteinuria might be a useful biomarker to identify those at a high risk for developing T2DM. Supplementary Information The online version contains supplementary material available at 10.1186/s12967-021-02934-y.
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Affiliation(s)
- Jimin Jeon
- Department of Neurology, Yongin Severance Hospital, Yonsei University College of Medicine, 363, Dongbaekjukjeon-daero, Giheung-gu, Yongin, 16995, Republic of Korea
| | - Jinkwon Kim
- Department of Neurology, Yongin Severance Hospital, Yonsei University College of Medicine, 363, Dongbaekjukjeon-daero, Giheung-gu, Yongin, 16995, Republic of Korea.
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16
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Cau SB, Bruder-Nascimento A, Silva MB, Ramalho FNZ, Mestriner F, Alves-Lopes R, Ferreira N, Tostes RC, Bruder-Nascimento T. Angiotensin-II activates vascular inflammasome and induces vascular damage. Vascul Pharmacol 2021; 139:106881. [PMID: 34098096 DOI: 10.1016/j.vph.2021.106881] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 05/20/2021] [Accepted: 05/27/2021] [Indexed: 01/10/2023]
Abstract
Angiotensin-II (Ang-II), a major target for treatment of cardiovascular disease, promotes cardiovascular dysfunction by directly modulating structure and function of vascular cells. Inflammasome components are expressed in the vasculature and are activated by specific stimuli. However, whether Ang-II activates the inflammasome in vascular cells or inflammasome activation contributes to Ang-II-induced vascular damage is still not fully elucidated. We tested the hypothesis that Ang-II induces endothelial dysfunction, vascular remodeling, and high blood pressure via inflammasome activation. C57BL6/J wild type (WT) and Caspase-1 knockout (Casp1-/-) mice were infused with vehicle or Ang-II for two weeks (490 ng/Kg/day) to determine whether the inflammasome contributes to vascular damage induced by Ang-II. Rat Aortic Vascular Smooth Muscle cells (RASMC) were used to determine if the interaction between Ang-II and inflammasomes causes migration and proliferation of vascular smooth muscle cells. Ex vivo studies revealed that Ang-II infusion induced vascular oxidative stress, endothelial dysfunction and vascular remodeling in WT mice. Casp1-/- mice were protected against Ang-II-induced vascular injury. In vitro experiments, Ang-II activated the NLRP3 inflammasome in RASMC, i.e. Ang-II increased Caspase-1 (Casp1) activity and cleavage of pro-interleukin (IL)-1β. MCC950 (NLRP3 receptor antagonist) prevented Ang-II-induced vascular migration and proliferation, but failed to reduce reactive oxygen species production. In conclusion, Ang-II leads to inflammasome activation in the vasculature contributing to endothelial dysfunction and vascular remodeling. Taken together, we place inflammasomes as a possible therapeutic target in conditions associated with increased Ang-II levels.
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Affiliation(s)
- Stefany B Cau
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil; Department of Pharmacology, Institute of Biological Sciences, Federal University of Minas Gerais, Brazil
| | - Ariane Bruder-Nascimento
- Department of Pediatrics, University of Pittsburgh, USA; Center for Pediatric Research in Obesity & Metabolism (CPROM), University of Pittsburgh, USA
| | - Marcondes B Silva
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil
| | - Fernanda N Z Ramalho
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil
| | - Fabiola Mestriner
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil
| | - Rheure Alves-Lopes
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil
| | - Nathanne Ferreira
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil
| | - Rita C Tostes
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil
| | - Thiago Bruder-Nascimento
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil; Department of Pediatrics, University of Pittsburgh, USA; Center for Pediatric Research in Obesity & Metabolism (CPROM), University of Pittsburgh, USA; Vascular Medicine Institute (VMI), University of Pittsburgh, USA.
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17
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Casasnovas J, Damron CL, Jarrell J, Orr KS, Bone RN, Archer-Hartmann S, Azadi P, Kua KL. Offspring of Obese Dams Exhibit Sex-Differences in Pancreatic Heparan Sulfate Glycosaminoglycans and Islet Insulin Secretion. Front Endocrinol (Lausanne) 2021; 12:658439. [PMID: 34108935 PMCID: PMC8181410 DOI: 10.3389/fendo.2021.658439] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 04/20/2021] [Indexed: 12/12/2022] Open
Abstract
Offspring of obese mothers suffer higher risks of type 2 diabetes due to increased adiposity and decreased β cell function. To date, the sex-differences in offspring islet insulin secretion during early life has not been evaluated extensively, particularly prior to weaning at postnatal day 21 (P21). To determine the role of maternal obesity on offspring islet insulin secretion, C57BL/6J female dams were fed chow or western diet from 4 weeks prior to mating to induce maternal obesity. First, offspring of chow-fed and obese dams were evaluated on postnatal day 21 (P21) prior to weaning for body composition, glucose and insulin tolerance, and islet phasic insulin-secretion. Compared to same-sex controls, both male and female P21 offspring born to obese dams (MatOb) had higher body adiposity and exhibited sex-specific differences in glucose tolerance and insulin secretion. The male MatOb offspring developed the highest extent of glucose intolerance and lowest glucose-induced insulin secretion. In contrast, P21 female offspring of obese dams had unimpaired insulin secretion. Using SAX-HPLC, we found that male MatOb had a decrease in pancreatic heparan sulfate glycosaminoglycan, which is a macromolecule critical for islet health. Notably, 8-weeks-old offspring of obese dams continued to exhibit a similar pattern of sex-differences in glucose intolerance and decreased islet insulin secretion. Overall, our study suggests that maternal obesity induces sex-specific changes to pancreatic HSG in offspring and a lasting effect on offspring insulin secretion, leading to the sex-differences in glucose intolerance.
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Affiliation(s)
- Jose Casasnovas
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Christopher Luke Damron
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States
| | - James Jarrell
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Kara S. Orr
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Robert N. Bone
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States
| | | | - Parastoo Azadi
- Complex Carbohydrate Research Center, University of Georgia, Athens, GA, United States
| | - Kok Lim Kua
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States
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18
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Li W, Wang C, Zhang D, Zeng K, Xiao S, Chen F, Luo J. Azilsartan ameliorates ox-LDL-induced endothelial dysfunction via promoting the expression of KLF2. Aging (Albany NY) 2021; 13:12996-13005. [PMID: 33946046 PMCID: PMC8148451 DOI: 10.18632/aging.202973] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 01/14/2021] [Indexed: 01/29/2023]
Abstract
Background: Oxidized LDL(Ox-LDL) mediated endothelial dysfunction is involved in the pathogenesis of various cardiovascular diseases, including atherosclerosis. Azilsartan is a potent agent for the treatment of hypertension as the antagonist of the angiotensin II receptor. This study will investigate whether Azilsartan possesses a beneficial effect against endothelial cell dysfunction induced by ox-LDL and explore the underlying preliminary mechanism. Methods: Ox-LDL was applied to construct an in vitro endothelial dysfunction model in human umbilical vascular endothelial cells (HUVECs). The expression of lectin-type oxidized LDL receptor 1 (LOX-1), endothelial nitric oxide synthase (eNOS), tight junction protein occludin, and transcriptional factor Krüppel-like factor 2 (KLF2) was detected using qRT-PCR and Western blot. ELISA and qRT-PCR were utilized to evaluate the production of chemokine monocyte chemotactic protein 1 (MCP-1) and chemokine (C-X-C motif) Ligand 1 Protein (CXCL1) in treated HUVECs. The generation of nitro oxide (NO) was determined using DAF-FM DA staining assay. KLF2 was silenced by transfecting the cells with specific Small interfering RNA (siRNA). FITC-dextran permeation assay was used to check the endothelial monolayer permeability of treated HUVECs. Results: Firstly, the elevated expressions of LOX-1, MCP-1, and CXCL-1 induced by stimulation with ox-LDL were significantly suppressed by Azilsartan. The downregulated eNOS and reduced production of NO induced by ox-LDL were reversed by the introduction of Azilsartan. Secondly, enlarged endothelial monolayer permeability and decreased expression of occludin stimulated with ox-LDL were greatly reversed by treatment with Azilsartan but were abolished by silencing the expression of KLF2. Lastly, the inhibited expression of KLF2 induced by ox-LDL was significantly elevated by the introduction of Azilsartan. Conclusion: Azilsartan might ameliorate ox-LDL-induced endothelial damage via elevating the expression of KLF2.
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Affiliation(s)
- Wenfeng Li
- Department of Cardiology, The First Affiliated Hospital of Jinan University, Guangzhou 510630, Guangdong, China.,Department of Cardiology, Ganzhou People's Hospital, Ganzhou 341000, Jiangxi, China
| | - Chenggao Wang
- Department of Cardiology, Ganzhou People's Hospital, Ganzhou 341000, Jiangxi, China
| | - Dandan Zhang
- Department of Cardiology, Ganzhou People's Hospital, Ganzhou 341000, Jiangxi, China
| | - Kanghua Zeng
- Department of Cardiology, Ganzhou People's Hospital, Ganzhou 341000, Jiangxi, China
| | - Shihui Xiao
- Department of Cardiology, Ganzhou People's Hospital, Ganzhou 341000, Jiangxi, China
| | - Feng Chen
- Department of Cardiology, Ganzhou People's Hospital, Ganzhou 341000, Jiangxi, China
| | - Jun Luo
- Department of Cardiology, Ganzhou People's Hospital, Ganzhou 341000, Jiangxi, China
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Ali M, Bakr MH, Abdelzaher LA, Sayed SA, Mali V, Desai AA, Radwan E. Lisofylline mitigates cardiac inflammation in a mouse model of obesity through improving insulin secretion and activating cardiac AMPK signaling pathway. Cytokine 2020; 138:155398. [PMID: 33341003 DOI: 10.1016/j.cyto.2020.155398] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 12/01/2020] [Accepted: 12/03/2020] [Indexed: 12/20/2022]
Abstract
Obesity has emerged as a leading cause of death in the last few decades, mainly due to associated cardiovascular diseases. Obesity, inflammation, and insulin resistance are strongly interlinked. Lisofylline (LSF), an anti-inflammatory agent, demonstrated protection against type 1 diabetes, as well as reduced obesity-induced insulin resistance and adipose tissue inflammation. However, its role in mitigating cardiac inflammation associated with obesity is not well studied. Mice were divided into 4 groups; the first group was fed regular chow diet, the second was fed regular chow diet and treated with LSF, the third was fed high fat diet (HFD), and the fourth was fed HFD and treated with LSF. Cardiac inflammation was interrogated via expression levels of TNF α, interleukins 6 and 10, phosphorylated STAT4 and lipoxygenases 12 and 12/15. Apoptosis and expression of the survival gene, AMPK, were also evaluated. We observed that LSF alleviated obesity-induced cardiac injury indirectly by improving both pancreatic β-cell function and insulin sensitivity, as well as, directly via upregulation of cardiac AMPK expression and downregulation of cardiac inflammation and apoptosis. LSF may represent an effective therapy targeting obesity-induced metabolic and cardiovascular complications.
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Affiliation(s)
- Maha Ali
- Department of Medical Biochemistry, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Marwa H Bakr
- Department of Histology and Cell Biology, Faculty of Medicine, Assiut University, Assiut, Egypt.
| | - Lobna A Abdelzaher
- Department of Pharmacology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Sally A Sayed
- Department of Physiology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Vishal Mali
- Krannert Institute of Cardiology, Department of Medicine, Indiana University, Indianapolis, IN, United States
| | - Ankit A Desai
- Krannert Institute of Cardiology, Department of Medicine, Indiana University, Indianapolis, IN, United States
| | - Eman Radwan
- Department of Medical Biochemistry, Faculty of Medicine, Assiut University, Assiut, Egypt
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20
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Oxidative Stress in Cytokine-Induced Dysfunction of the Pancreatic Beta Cell: Known Knowns and Known Unknowns. Metabolites 2020; 10:metabo10120480. [PMID: 33255484 PMCID: PMC7759861 DOI: 10.3390/metabo10120480] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/18/2020] [Accepted: 11/21/2020] [Indexed: 12/12/2022] Open
Abstract
Compelling evidence from earlier studies suggests that the pancreatic beta cell is inherently weak in its antioxidant defense mechanisms to face the burden of protecting itself against the increased intracellular oxidative stress following exposure to proinflammatory cytokines. Recent evidence implicates novel roles for nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (Noxs) as contributors to the excessive intracellular oxidative stress and damage under metabolic stress conditions. This review highlights the existing evidence on the regulatory roles of at least three forms of Noxs, namely Nox1, Nox2, and Nox4, in the cascade of events leading to islet beta cell dysfunction, specifically under the duress of chronic exposure to cytokines. Potential crosstalk between key signaling pathways (e.g., inducible nitric oxide synthase [iNOS] and Noxs) in the generation and propagation of reactive molecules and metabolites leading to mitochondrial damage and cell apoptosis is discussed. Available data accrued in investigations involving small-molecule inhibitors and antioxidant protein expression methods as tools toward the prevention of cytokine-induced oxidative damage are reviewed. Lastly, current knowledge gaps in this field, and possible avenues for future research are highlighted.
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21
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Sahukari R, Punabaka J, Bhasha S, Ganjikunta VS, Ramudu SK, Kesireddy SR. Plant Compounds for the Treatment of Diabetes, a Metabolic Disorder: NF-κB as a Therapeutic Target. Curr Pharm Des 2020; 26:4955-4969. [DOI: 10.2174/1381612826666200730221035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 06/04/2020] [Indexed: 12/12/2022]
Abstract
Background:
The prevalence of diabetes in the world population hás reached 8.8 % and is expected to
rise to 10.4% by 2040. Hence, there is an urgent need for the discovery of drugs against therapeutic targets to
sojourn its prevalence. Previous studies proved that NF-κB serves as a central agent in the development of diabetic
complications.
Objectives:
This review intended to list the natural plant compounds that would act as inhibitors of NF-κB signalling
in different organs under the diabetic condition with their possible mechanism of action.
Methods:
Information on NF-κB, diabetes, natural products, and relation in between them, was gathered from
scientific literature databases such as Pubmed, Medline, Google scholar, Science Direct, Springer, Wiley online
library.
Results and Conclusion:
NF-κB plays a crucial role in the development of diabetic complications because of its
link in the expression of genes that are responsible for organs damage such as kidney, brain, eye, liver, heart,
muscle, endothelium, adipose tissue and pancreas by inflammation, apoptosis and oxidative stress. Activation of
PPAR-α, SIRT3/1, and FXR through many cascades by plant compounds such as terpenoids, iridoids, flavonoids,
alkaloids, phenols, tannins, carbohydrates, and phytocannabinoids recovers diabetic complications. These compounds
also exhibit the prevention of NF-κB translocation into the nucleus by inhibiting NF-κB activators, such
as VEGFR, RAGE and TLR4 receptors, which in turn, prevent the activation of many genes involved in tissue
damage. Current knowledge on the treatment of diabetes by targeting NF-κB is limited, so future studies would
enlighten accordingly.
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Affiliation(s)
- Ravi Sahukari
- Division of Molecular Biology and Ethnopharmacology, Department of Zoology, Sri Venkateswara University, Tirupati, India
| | - Jyothi Punabaka
- Division of Molecular Biology and Ethnopharmacology, Department of Zoology, Sri Venkateswara University, Tirupati, India
| | - Shanmugam Bhasha
- Division of Molecular Biology and Ethnopharmacology, Department of Zoology, Sri Venkateswara University, Tirupati, India
| | - Venkata S. Ganjikunta
- Division of Molecular Biology and Ethnopharmacology, Department of Zoology, Sri Venkateswara University, Tirupati, India
| | - Shanmugam K. Ramudu
- Division of Molecular Biology and Ethnopharmacology, Department of Zoology, Sri Venkateswara University, Tirupati, India
| | - Sathyavelu R. Kesireddy
- Division of Molecular Biology and Ethnopharmacology, Department of Zoology, Sri Venkateswara University, Tirupati, India
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22
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Antioxidant Effects and Mechanisms of Medicinal Plants and Their Bioactive Compounds for the Prevention and Treatment of Type 2 Diabetes: An Updated Review. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:1356893. [PMID: 32148647 PMCID: PMC7042557 DOI: 10.1155/2020/1356893] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 12/31/2019] [Accepted: 01/16/2020] [Indexed: 12/14/2022]
Abstract
Diabetes mellitus is a metabolic disorder that majorly affects the endocrine gland, and it is symbolized by hyperglycemia and glucose intolerance owing to deficient insulin secretory responses and beta cell dysfunction. This ailment affects as many as 451 million people worldwide, and it is also one of the leading causes of death. In spite of the immense advances made in the development of orthodox antidiabetic drugs, these drugs are often considered not successful for the management and treatment of T2DM due to the myriad side effects associated with them. Thus, the exploration of medicinal herbs and natural products as therapeutic sources for the treatment of T2DM is promoted because they have little or no side effects. Bioactive molecules isolated from natural sources have been proven to lower blood glucose levels via regulating one or more of the following mechanisms: improvement of beta cell function, insulin resistance, glucose (re)absorption, and glucagon-like peptide-1 homeostasis. In recent times, the mechanisms of action of different bioactive molecules with antidiabetic properties and phytochemistry are gaining a lot of attention in the area of drug discovery. This review article presents an update of the findings from clinical research into medicinal plant therapy for T2DM.
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23
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Fais RS, Rodrigues FL, Pereira CA, Mendes AC, Mestriner F, Tostes RC, Carneiro FS. The inflammasome NLRP3 plays a dual role on mouse corpora cavernosa relaxation. Sci Rep 2019; 9:16224. [PMID: 31700106 PMCID: PMC6838322 DOI: 10.1038/s41598-019-52831-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 10/18/2019] [Indexed: 12/25/2022] Open
Abstract
NLRP3 plays a role in vascular diseases. Corpora cavernosa (CC) is an extension of the vasculature. We hypothesize that NLRP3 plays a deleterious role in CC relaxation. Male C57BL/6 (WT) and NLRP3 deficient (NLRP3−/−) mice were used. Intracavernosal pressure (ICP/MAP) measurement was performed. Functional responses were obtained from CC strips of WT and NLRP3−/− mice before and after MCC950 (NLRP3 inhibitor) or LPS + ATP (NLRP3 stimulation). NLRP3, caspase-1, IL-1β, eNOS, nNOS, guanylyl cyclase-β1 (GCβ1) and PKG1 protein expressions were determined. ICP/MAP and sodium nitroprusside (SNP)-induced relaxation in CC were decreased in NLRP3−/− mice. Caspase-1, IL-1β and eNOS activity were increased, but PKG1 was reduced in CC of NLRP3−/−. MCC950 decreased non-adrenergic non-cholinergic (NANC), acetylcholine (ACh), and SNP-induced relaxation in WT mice. MCC950 did not alter NLRP3, caspase-1 and IL-1β, but reduced GCβ1 expression. Although LPS + ATP decreased ACh- and SNP-, it increased NANC-induced relaxation in CC from WT, but not from NLRP3−/− mice. LPS + ATP increased NLRP3, caspase-1 and interleukin-1β (IL-1β). Conversely, it reduced eNOS activity and GCβ1 expression. NLRP3 plays a dual role in CC relaxation, with its inhibition leading to impairment of nitric oxide-mediated relaxation, while its activation by LPS + ATP causes decreased CC sensitivity to NO and endothelium-dependent relaxation.
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Affiliation(s)
- Rafael S Fais
- Departments of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Fernanda L Rodrigues
- Departments of Physiology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Camila A Pereira
- Departments of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Allan C Mendes
- Departments of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Fabíola Mestriner
- Departments of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Rita C Tostes
- Departments of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Fernando S Carneiro
- Departments of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil.
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24
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Fu S, Meng Y, Lin S, Zhang W, He Y, Huang L, Du H. Transcriptomic responses of hypothalamus to acute exercise in type 2 diabetic Goto-Kakizaki rats. PeerJ 2019; 7:e7743. [PMID: 31579613 PMCID: PMC6764357 DOI: 10.7717/peerj.7743] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 08/25/2019] [Indexed: 12/21/2022] Open
Abstract
The hypothalamus has an integral role in energy homeostasis regulation, and its dysfunctions lead to the development of type 2 diabetes (T2D). Physical activity positively affects the prevention and treatment of T2D. However, there is not much information on the adaptive mechanisms of the hypothalamus. In this study, RNA sequencing was used to determine how acute exercise affects hypothalamic transcriptome from both type 2 diabetic Goto-Kakizaki (GK) and control Wistar rats with or without a single session of running (15 m/min for 60 min). Through pairwise comparisons, we identified 957 differentially expressed genes (DEGs), of which 726, 197, and 98 genes were found between GK and Wistar, exercised GK and GK, and exercised Wistar and Wistar, respectively. The results of Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway enrichment revealed that lipid metabolism-related terms and pathways were enriched in GK and exercised GK rats, and nervous system related terms and pathways were enriched in exercised GK and Wistar rats. Furthermore, 45 DEGs were associated with T2D and related phenotypes according to the annotations in the Rat Genome Database. Among these 45 DEGs, several genes (Plin2, Cd36, Lpl, Wfs1, Cck) related to lipid metabolism or the nervous system are associated with the exercise-induced benefits in the hypothalamus of GK rats. Our findings might assist in identifying potential therapeutic targets for T2D prevention and treatment.
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Affiliation(s)
- Shuying Fu
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Yuhuan Meng
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Shudai Lin
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Wenlu Zhang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Yuting He
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Lizhen Huang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Hongli Du
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
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25
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Zhang Z, Xiong T, Zheng R, Huang J, Guo L. N‑acetyl cysteine protects HUVECs against lipopolysaccharide‑mediated inflammatory reaction by blocking the NF‑κB signaling pathway. Mol Med Rep 2019; 20:4349-4357. [PMID: 31545445 DOI: 10.3892/mmr.2019.10678] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 08/06/2019] [Indexed: 11/05/2022] Open
Abstract
The purpose of the study was to explore the potential protective effects of N‑acetylcysteine (NAC) against lipopolysaccharide (LPS)‑induced inflammatory injury to human umbilical vein endothelial cells (HUVECs). It was also assessed whether the underlying mechanism of this protective effect is mediated via suppression of the nuclear factor‑kappa B (NF‑κB) signaling pathway. Cell viability of HUVECs treated with different concentrations of NAC was assessed using Cell Counting Kit‑8 (CCK‑8) assay. The mRNA expression of inflammatory factors [interleukin‑8 (IL‑8), tumor necrosis factor α (TNF‑α), inducible nitric oxide synthase (iNOS), and intercellular cell adhesive molecule 1 (ICAM‑1)] were assessed using real time semi‑quantitative polymerase chain reaction. Protein expression levels of TNF‑α and IL‑8 were assessed using enzyme‑linked immunosorbent assay. Protein expression levels of ICAM‑1 and the NF‑κB signaling pathway were assessed using western blotting. Nitric reductase method was used to quantify nitric oxide (NO) and iNOS. LPS stimulated the production of TNF‑α, IL‑8, NO, and ICAM‑1 by HUVECs. Moreover, LPS induced activation of the NF‑κB signaling pathway and increased the protein expression of phosphorylated p65. However, pretreatment of HUVECs with NAC significantly attenuated the increase in the expression of inflammatory factors and the level of phosphorylated p65; this indicated that NAC prevented the activation of the NF‑κB signaling pathway. The present findings indicated that NAC protects HUVECs against LPS‑mediated inflammatory reaction and alleviates inflammation. The underlying mechanism is related to the NF‑κB signaling pathway. NAC appears to be a promising agent for prevention and treatment of inflammatory diseases.
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Affiliation(s)
- Zhenzhen Zhang
- Department of Prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Ting Xiong
- Department of Prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Rui Zheng
- Department of Prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Jialin Huang
- Department of Prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Ling Guo
- Department of Prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
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26
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Zoso A, Zambon A, Gagliano O, Giulitti S, Prevedello L, Fadini GP, Luni C, Elvassore N. Cross-talk of healthy and impaired human tissues for dissection of disease pathogenesis. Biotechnol Prog 2018; 35:e2766. [PMID: 30548838 DOI: 10.1002/btpr.2766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 12/10/2018] [Accepted: 12/11/2018] [Indexed: 11/11/2022]
Abstract
Systemic diseases affect multiple tissues that interact with each other within a network difficult to explore at the body level. However, understanding the interdependences between tissues could be of high relevance for drug target identification, especially at the first stages of disease development. In vitro systems have the advantages of accessibility to measurements and precise controllability of culture conditions, but currently have limitations in mimicking human in vivo systemic tissue response. In this work, we present an in vitro model of cross-talk between an ex vivo culture of adipose tissue from an obese donor and a skeletal muscle in vitro model from a healthy donor. This is relevant to understand type 2 diabetes mellitus pathogenesis, as obesity is one of its main risk factors. The human adipose tissue biopsy was maintained as a three-dimensional culture for 48 h. Its conditioned culture medium was used to stimulate a human skeletal muscle-on-chip, developed by differentiating primary cells of a patient's biopsy under topological cues and molecular self-regulation. This system has been characterized to demonstrate its ability to mimic important features of the normal skeletal muscle response in vivo. We then found that the conditioned medium from a diseased adipose tissue is able to perturb the normal insulin sensitivity of a healthy skeletal muscle, as reported in the early stages of diabetes onset. In perspective, this work represents an important step toward the development of technological platforms that allow to study and dissect the systemic interaction between unhealthy and healthy tissues in vitro. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 35: e2766, 2019.
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Affiliation(s)
- Alice Zoso
- Venetian Inst. of Molecular Medicine, Via Orus 2, Padova, 35129, Italy.,Dept. of Industrial Engineering, University of Padova, Via Marzolo 9, Padova, 35131, Italy
| | - Alessandro Zambon
- Venetian Inst. of Molecular Medicine, Via Orus 2, Padova, 35129, Italy.,Dept. of Industrial Engineering, University of Padova, Via Marzolo 9, Padova, 35131, Italy
| | - Onelia Gagliano
- Venetian Inst. of Molecular Medicine, Via Orus 2, Padova, 35129, Italy.,Dept. of Industrial Engineering, University of Padova, Via Marzolo 9, Padova, 35131, Italy
| | - Stefano Giulitti
- Venetian Inst. of Molecular Medicine, Via Orus 2, Padova, 35129, Italy.,Dept. of Industrial Engineering, University of Padova, Via Marzolo 9, Padova, 35131, Italy
| | - Luca Prevedello
- Dept. of Surgery, Oncology and Gastroenterology, University of Padova, Padova, 35124, Italy
| | | | - Camilla Luni
- Shanghai Inst. for Advanced Immunochemical Studies, ShanghaiTech University, 393 Huaxia Road, Shanghai, 201210, China
| | - Nicola Elvassore
- Venetian Inst. of Molecular Medicine, Via Orus 2, Padova, 35129, Italy.,Dept. of Industrial Engineering, University of Padova, Via Marzolo 9, Padova, 35131, Italy.,Shanghai Inst. for Advanced Immunochemical Studies, ShanghaiTech University, 393 Huaxia Road, Shanghai, 201210, China.,Stem Cells & Regenerative Medicine Section, UCL Great Ormond Street Institute of Child Health, 30 Guilford Street, London, WC1N 1EH, U.K
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27
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Zeng M, Luo Y, Xu C, Li R, Chen N, Deng X, Fang D, Wang L, Wu J, Luo M. Platelet-endothelial cell interactions modulate smooth muscle cell phenotype in an in vitro model of type 2 diabetes mellitus. Am J Physiol Cell Physiol 2018; 316:C186-C197. [PMID: 30517030 DOI: 10.1152/ajpcell.00428.2018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Platelet (PLT)-endothelial cell (EC) interaction appears to contribute to phenotypic transition of vascular smooth muscle cells (VSMCs), which play an important role in the physiological and pathological process of vascular complications in type 2 diabetes mellitus (DM2). However, the precise mechanisms by which interactions between PLTs and ECs affect VSMC phenotype have largely remained unclear. We determined the effect of diabetic PLT-EC interaction to influence VSMC migration, proliferation, and phenotypic transformation in triple-cell coculture models using the quantitative real-time PCR, Western blot, fluorescence microscopy, wound scratch assays, CCK-8 assays, and gelatin zymography assays. Our results revealed DM2 PLT-EC interaction to be associated with a significant downregulation of VSMC-specific contractile phenotypic genes and proteins, including SM22α, smooth muscle actin, Smoothelin-B, and smooth muscle-myosin heavy chain. Inversely, VSMC-specific proliferative phenotype gene and protein levels, including cyclin D1 and 2, nonmuscle myosin heavy chain B, and PCNA were in upregulation. Furthermore, the DM2-originated PLT-EC interaction promoted the expression level of transforming growth factor-β1, and the PI3K/Akt and matrix metalloproteinase 9 signaling pathway was activated subsequently. Finally, these reactions contributed to a synthetic phenotype of VSMCs, including the proliferation, migration, and gelatinolytic activities. These findings suggest that PLT-EC interaction modulates the phenotypic transition of VSMCs between a contractile and proliferative/synthetic phenotype under diabetic conditions, conceivably providing important implications regarding the mechanisms controlling the VSMC phenotypic transition and the development of cardiovascular complications.
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Affiliation(s)
- Min Zeng
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, China.,Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China.,Department of Pharmacy, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Yulin Luo
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, China.,Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China.,GCP Center, Affiliated Hospital (Traditional Chinese Medicine) of Southwest Medical University, Luzhou, China
| | - Chunrong Xu
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, China.,Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Rong Li
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, China.,Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Ni Chen
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, China.,Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Xin Deng
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, China.,Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Dan Fang
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, China.,Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Liqun Wang
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, China.,Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Jianbo Wu
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, China.,Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China.,Dalton Cardiovascular Research Center, University of Missouri-Columbia , Columbia, Missouri
| | - Mao Luo
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, China.,Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
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28
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Yang X, Xu C, Wang Y, Cao C, Tao Q, Zhan S, Sun F. Risk prediction model of dyslipidaemia over a 5-year period based on the Taiwan MJ health check-up longitudinal database. Lipids Health Dis 2018; 17:259. [PMID: 30447693 PMCID: PMC6240269 DOI: 10.1186/s12944-018-0906-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 11/08/2018] [Indexed: 01/13/2023] Open
Abstract
OBJECTIVE This study aimed to provide an epidemiological model to evaluate the risk of developing dyslipidaemia within 5 years in the Taiwanese population. METHODS A cohort of 11,345 subjects aged 35-74 years and was non-dyslipidaemia in the initial year 1996 and followed in 1997-2006 to derive a risk score that could predict the occurrence of dyslipidaemia. Multivariate logistic regression was used to derive the risk functions using the check-up centre of the overall cohort. Rules based on these risk functions were evaluated in the remaining three centres as the testing cohort. We evaluated the predictability of the model using the area under the receiver operating characteristic (ROC) curve (AUC) to confirm its diagnostic property on the testing sample. We also established the degrees of risk based on the cut-off points of these probabilities after transforming them into a normal distribution by log transformation. RESULTS The incidence of dyslipidaemia over the 5-year period was 19.1%. The final multivariable logistic regression model includes the following six risk factors: gender, history of diabetes, triglyceride level, HDL-C (high-density lipoprotein cholesterol), LDL-C (low-density lipoprotein cholesterol) and BMI (body mass index). The ROC AUC was 0.709 (95% CI: 0.693-0.725), which could predict the development of dyslipidaemia within 5 years. CONCLUSION This model can help individuals assess the risk of dyslipidaemia and guide group surveillance in the community.
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Affiliation(s)
- Xinghua Yang
- School of Public Health, Capital Medical University, 10 Xitoutiao, Youanmen, Beijing, 100069, China.
- Beijing Municipal Key Laboratory of Clinical Epidemiology, 10 Xitoutiao, Youanmen, Beijing, 100069, China.
| | - Chaonan Xu
- School of Public Health, Capital Medical University, 10 Xitoutiao, Youanmen, Beijing, 100069, China
- Beijing Municipal Key Laboratory of Clinical Epidemiology, 10 Xitoutiao, Youanmen, Beijing, 100069, China
| | - Yunfeng Wang
- School of Public Health, Capital Medical University, 10 Xitoutiao, Youanmen, Beijing, 100069, China
- Beijing Municipal Key Laboratory of Clinical Epidemiology, 10 Xitoutiao, Youanmen, Beijing, 100069, China
| | - Chunkeng Cao
- MJ Health Management Organizations, Taipei, Taiwan
| | - Qiushan Tao
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Centre, No. 38 Xueyuan Road, Haidian District, Beijing, 100191, China
| | - Siyan Zhan
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Centre, No. 38 Xueyuan Road, Haidian District, Beijing, 100191, China
| | - Feng Sun
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Centre, No. 38 Xueyuan Road, Haidian District, Beijing, 100191, China
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29
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Dobrian AD, Morris MA, Taylor-Fishwick DA, Holman TR, Imai Y, Mirmira RG, Nadler JL. Role of the 12-lipoxygenase pathway in diabetes pathogenesis and complications. Pharmacol Ther 2018; 195:100-110. [PMID: 30347209 DOI: 10.1016/j.pharmthera.2018.10.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
12-lipoxygenase (12-LOX) is one of several enzyme isoforms responsible for the metabolism of arachidonic acid and other poly-unsaturated fatty acids to both pro- and anti-inflammatory lipid mediators. Mounting evidence has shown that 12-LOX plays a critical role in the modulation of inflammation at multiple checkpoints during diabetes development. Due to this, interventions to limit pro-inflammatory 12-LOX metabolites either by isoform-specific 12-LOX inhibition, or by providing specific fatty acid substrates via dietary intervention, has the potential to significantly and positively impact health outcomes of patients living with both type 1 and type 2 diabetes. To date, the development of truly specific and efficacious inhibitors has been hampered by homology of LOX family members; however, improvements in high throughput screening have improved the inhibitor landscape. Here, we describe the function and role of human 12-LOX, and mouse 12-LOX and 12/15-LOX, in the development of diabetes and diabetes-related complications, and describe promise in the development of strategies to limit pro-inflammatory metabolites, primarily via new small molecule 12-LOX inhibitors.
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Affiliation(s)
- A D Dobrian
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, United States
| | - M A Morris
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, VA, United States
| | - D A Taylor-Fishwick
- Department of Microbiology, Cell and Molecular Biology, Eastern Virginia Medical School, Norfolk, VA, United States
| | - T R Holman
- Department of Chemistry and Biochemistry, University of California Santa Cruz, Santa Cruz, CA, United States
| | - Y Imai
- University of Iowa Carver College of Medicine, Fraternal Order of Eagles Diabetes Research Center, University of Iowa, Iowa, city, IA, United States
| | - R G Mirmira
- Center for Diabetes and Metabolic Diseases, Indiana University School of Medicine, Indianapolis, Indiana, USA; Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, USA; Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana, USA; Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA; Department of Cellular and Integrative Physiology, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - J L Nadler
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, VA, United States.
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30
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Lontchi-Yimagou E, Boudou P, Nguewa JL, Noubiap JJ, Kamwa V, Djahmeni EN, Atogho-Tiedeu B, Azabji-Kenfack M, Etoa M, Lemdjo G, Dehayem MY, Mbanya JC, Gautier JF, Sobngwi E. Acute phase ketosis-prone atypical diabetes is associated with a pro-inflammatory profile: a case-control study in a sub-Saharan African population. J Diabetes Metab Disord 2018; 17:37-43. [PMID: 30288384 PMCID: PMC6154517 DOI: 10.1007/s40200-018-0336-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 01/01/2018] [Indexed: 12/01/2022]
Affiliation(s)
- Eric Lontchi-Yimagou
- 1Laboratory for Molecular Medicine and Metabolism, Biotechnology Center, University of Yaoundé 1, PO Box 87, Yaoundé, Cameroon
| | - Philippe Boudou
- 2Unit of Hormonal Biology, Department of Biochemistry, Saint-Louis University Hospital, Assistance Publique-Hôpitaux de Paris (APHP), 1 avenue Claude Vellefaux, 75010 Paris, France
| | - Jean Louis Nguewa
- 3Inserm UMRS 1138, Cordeliers Research Centre, University Paris-6, 75006 Paris, France
| | - Jean Jacques Noubiap
- 4Department of Medicine, Groote Schuur Hospital and University of Cape Town, Cape Town, South Africa
| | - Vicky Kamwa
- University hospital of Birmingham, Birmingham, UK
| | | | - Babara Atogho-Tiedeu
- 1Laboratory for Molecular Medicine and Metabolism, Biotechnology Center, University of Yaoundé 1, PO Box 87, Yaoundé, Cameroon
| | - Marcel Azabji-Kenfack
- 7Department of Physiological Sciences and Biochemistry, Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Yaoundé, Cameroon
| | - Martine Etoa
- National Obesity Centre, Yaoundé Central Hospital, Yaoundé, Cameroon
| | - Gaelle Lemdjo
- National Obesity Centre, Yaoundé Central Hospital, Yaoundé, Cameroon
| | | | - Jean Claude Mbanya
- 1Laboratory for Molecular Medicine and Metabolism, Biotechnology Center, University of Yaoundé 1, PO Box 87, Yaoundé, Cameroon.,National Obesity Centre, Yaoundé Central Hospital, Yaoundé, Cameroon.,8Department of Internal Medicine, Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Yaoundé, Cameroon
| | - Jean-Francois Gautier
- 2Unit of Hormonal Biology, Department of Biochemistry, Saint-Louis University Hospital, Assistance Publique-Hôpitaux de Paris (APHP), 1 avenue Claude Vellefaux, 75010 Paris, France.,3Inserm UMRS 1138, Cordeliers Research Centre, University Paris-6, 75006 Paris, France
| | - Eugène Sobngwi
- 1Laboratory for Molecular Medicine and Metabolism, Biotechnology Center, University of Yaoundé 1, PO Box 87, Yaoundé, Cameroon.,National Obesity Centre, Yaoundé Central Hospital, Yaoundé, Cameroon.,8Department of Internal Medicine, Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Yaoundé, Cameroon
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31
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Li W, Huang H, Li L, Wang L, Li Y, Wang Y, Guo S, Li L, Wang D, He Y, Chen L. The Pathogenesis of Atherosclerosis Based on Human Signaling Networks and Stem Cell Expression Data. Int J Biol Sci 2018; 14:1678-1685. [PMID: 30416382 PMCID: PMC6216023 DOI: 10.7150/ijbs.27896] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 08/01/2018] [Indexed: 02/07/2023] Open
Abstract
Atherosclerosis is a common and complex disease, whose morbidity increased significantly. Here, an integrated approach was proposed to elucidate systematically the pathogenesis of atherosclerosis from a systems biology point of view. Two weighted human signaling networks were constructed based on atherosclerosis related gene expression data of stem cells. Then, 37 candidate Atherosclerosis-risk Modules were detected using four kinds of permutation tests. Five Atherosclerosis-risk Modules (three Absent Modules and two Emerging Modules) enriched in functions significantly associated with disease genes were identified and verified to be associated with the maintenance of normal biological process and the pathogenesis and development of atherosclerosis. Especially for Atherosclerosis-risk Emerging Module P96, it could distinguish between normal and disease samples by Supporting Vector Machine with the average expression value of the module as classification feature. These identified modules and their genes may act as potential atherosclerosis biomarkers. Our study would shed light on the signal transduction of atherosclerosis, and provide new insights to its pathogenesis from the perspective of stem cells.
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Affiliation(s)
- Wan Li
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Hao Huang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Lei Li
- Department of Neurology, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Li Wang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Yong Li
- Dean's Office, Harbin Medical University, Harbin, Heilongjiang, China
| | - Yahui Wang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Shanshan Guo
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Liansheng Li
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Donghua Wang
- Department of general surgery, General Hospital of Heilongjiang Province Land Reclamation Bureau, 150088, Harbin, China
| | - Yuehan He
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Lina Chen
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang, China
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Zhong S, Ge J, Yu JY. Icariin prevents cytokine-induced β-cell death by inhibiting NF-κB signaling. Exp Ther Med 2018; 16:2756-2762. [PMID: 30210617 DOI: 10.3892/etm.2018.6502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 05/17/2018] [Indexed: 12/13/2022] Open
Abstract
The loss of insulin secretion in type I diabetes mellitus (T1DM) is caused by autoimmune-mediated destruction of insulin-producing pancreatic β-cells. Inflammatory cytokines and immune cell infiltration activate oxidative and endoplasmic reticulum (ER) stress, resulting in reduced β-cell viability. The current pharmacological agents used to control blood glucose have a limited effective duration and are accompanied by strong side effects. Blocking the inflammatory and immune responses that cause the β-cell damage has been investigated as a novel therapeutic approach to control T1DM. Icariin is a flavonoid component of Chinese medicinal herbs that has anti-inflammatory effects in vitro and in vivo. The results of the present study revealed that icariin abrogates the pro-apoptotic effect of inflammatory cytokines and significantly suppresses the activation of nuclear factor (NF)-κB in rat pancreatic β-cell lines. The present study may provide a basis for the potential use of icariin as a therapeutic agent for T1DM.
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Affiliation(s)
- Shao Zhong
- Department of Endocrinology, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, P.R. China.,Department of Endocrinology, Affiliated Kunshan Hospital of Jiangsu University, Kunshan, Jiangsu 215300, P.R. China
| | - Jing Ge
- Department of Endocrinology, Jiangsu Province Hospital of Traditional Chinese Medicine, Affiliated Hospital of Nanjing University of Traditional Chinese Medicine, Nanjing, Jiangsu 210029, P.R. China
| | - Jiang-Yi Yu
- Department of Endocrinology, Jiangsu Province Hospital of Traditional Chinese Medicine, Affiliated Hospital of Nanjing University of Traditional Chinese Medicine, Nanjing, Jiangsu 210029, P.R. China
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Dobrian AD, Huyck RW, Glenn L, Gottipati V, Haynes BA, Hansson GI, Marley A, McPheat WL, Nadler JL. Activation of the 12/15 lipoxygenase pathway accompanies metabolic decline in db/db pre-diabetic mice. Prostaglandins Other Lipid Mediat 2018; 136:23-32. [PMID: 29605541 DOI: 10.1016/j.prostaglandins.2018.03.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 02/06/2018] [Accepted: 03/15/2018] [Indexed: 12/17/2022]
Abstract
The 12-lipoxygenase (12LO) pathway is a promising target to reduce islet dysfunction, adipose tissue (AT) inflammation and insulin resistance. Optimal pre-clinical models for the investigation of selective12LO inhibitors in this context have not yet been identified. The objective of this study was to characterize the time course of 12LO isoform expression and metabolite production in pancreatic islets and AT of C57BLKS/J-db/db obese diabetic mouse in a pre-diabetic state in order to establish a suitable therapeutic window for intervention with selective lipoxygenase inhibitors. Mice have 2 major 12LO isoforms -the leukocyte type (12/15LO) and the platelet type (p12LO) and both are expressed in islets and AT. We found a sharp increase in protein expression of 12/15LO in the pancreatic islets of 10-week old db-/- mice compared to 8- week old counterparts. Immunohistochemistry showed that the increase in islet 12/15LO parallels a decline in islet number. Analysis of 12- and 15-hydroperoxytetraeicosanoid acids (HETE)s showed a 2-3 fold increase especially in 12(S)-HETE that mirrored the increase in 12/15LO expression in islets. Analysis of AT and stromal vascular fraction (SVF) showed a significant increase of platelet 12LO gene expression along with 12- and 15- HETEs. The data demonstrate that the db/db mouse is a suitable model for investigation of 12/15LO inhibitors in the development of inflammatory mediated type 2 diabetes, with a narrow window of therapeutic intervention prior to 8 weeks of age.
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Affiliation(s)
- Anca D Dobrian
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, United States.
| | - Ryan W Huyck
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, United States
| | - Lindsey Glenn
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, VA, United States
| | - Vijay Gottipati
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, United States
| | - Bronson A Haynes
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, United States
| | - Göran I Hansson
- Cardiovascular and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Pepparedsleden 1, Mölndal, 431 83, Sweden
| | - Anna Marley
- Discovery Sciences, Innovative Medicines and Early Development Biotech Unit, AstraZeneca,Alderley Park, Macclesfield, Cheshire, SK10 4TG, UK
| | - William L McPheat
- Cardiovascular and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Pepparedsleden 1, Mölndal, 431 83, Sweden
| | - Jerry L Nadler
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, VA, United States
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Stapleton PA, Hathaway QA, Nichols CE, Abukabda AB, Pinti MV, Shepherd DL, McBride CR, Yi J, Castranova VC, Hollander JM, Nurkiewicz TR. Maternal engineered nanomaterial inhalation during gestation alters the fetal transcriptome. Part Fibre Toxicol 2018; 15:3. [PMID: 29321036 PMCID: PMC5763571 DOI: 10.1186/s12989-017-0239-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 12/21/2017] [Indexed: 01/19/2023] Open
Abstract
Background The integration of engineered nanomaterials (ENM) is well-established and widespread in clinical, commercial, and domestic applications. Cardiovascular dysfunctions have been reported in adult populations after exposure to a variety of ENM. As the diversity of these exposures continues to increase, the fetal ramifications of maternal exposures have yet to be determined. We, and others, have explored the consequences of ENM inhalation during gestation and identified many cardiovascular and metabolic outcomes in the F1 generation. The purpose of these studies was to identify genetic alterations in the F1 generation of Sprague-Dawley rats that result from maternal ENM inhalation during gestation. Pregnant dams were exposed to nano-titanium dioxide (nano-TiO2) aerosols (10 ± 0.5 mg/m3) for 7-8 days (calculated, cumulative lung deposition = 217 ± 1 μg) and on GD (gestational day) 20 fetal hearts were isolated. DNA was extracted and immunoprecipitated with modified chromatin marks histone 3 lysine 4 tri-methylation (H3K4me3) and histone 3 lysine 27 tri-methylation (H3K27me3). Following chromatin immunoprecipitation (ChIP), DNA fragments were sequenced. RNA from fetal hearts was purified and prepared for RNA sequencing and transcriptomic analysis. Ingenuity Pathway Analysis (IPA) was then used to identify pathways most modified by gestational ENM exposure. Results The results of the sequencing experiments provide initial evidence that significant epigenetic and transcriptomic changes occur in the cardiac tissue of maternal nano-TiO2 exposed progeny. The most notable alterations in major biologic systems included immune adaptation and organismal growth. Changes in normal physiology were linked with other tissues, including liver and kidneys. Conclusions These results are the first evidence that maternal ENM inhalation impacts the fetal epigenome. Electronic supplementary material The online version of this article (10.1186/s12989-017-0239-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- P A Stapleton
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ, USA.,Environmental and Occupational Health Sciences Institute, Piscataway, NJ, USA
| | - Q A Hathaway
- Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, WV, USA.,Mitochondria, Metabolism & Bioenergetics Working Group, West Virginia University School of Medicine, Morgantown, WV, USA.,Toxicology Working Group, West Virginia University School of Medicine, Morgantown, WV, USA
| | - C E Nichols
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - A B Abukabda
- Toxicology Working Group, West Virginia University School of Medicine, Morgantown, WV, USA.,Department of Pharmaceutical Sciences, West Virginia University School of Pharmacy, Morgantown, USA
| | - M V Pinti
- Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, WV, USA.,Mitochondria, Metabolism & Bioenergetics Working Group, West Virginia University School of Medicine, Morgantown, WV, USA
| | - D L Shepherd
- Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, WV, USA.,Mitochondria, Metabolism & Bioenergetics Working Group, West Virginia University School of Medicine, Morgantown, WV, USA
| | - C R McBride
- Toxicology Working Group, West Virginia University School of Medicine, Morgantown, WV, USA.,Department of Physiology, Pharmacology, and Neuroscience, Robert C. Byrd Health Sciences Center, West Virginia University School of Medicine, 1 Medical Center Drive, Morgantown, WV, 26506-9229, USA
| | - J Yi
- Toxicology Working Group, West Virginia University School of Medicine, Morgantown, WV, USA.,Department of Physiology, Pharmacology, and Neuroscience, Robert C. Byrd Health Sciences Center, West Virginia University School of Medicine, 1 Medical Center Drive, Morgantown, WV, 26506-9229, USA
| | - V C Castranova
- Toxicology Working Group, West Virginia University School of Medicine, Morgantown, WV, USA.,Department of Pharmaceutical Sciences, West Virginia University School of Pharmacy, Morgantown, USA
| | - J M Hollander
- Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, WV, USA.,Mitochondria, Metabolism & Bioenergetics Working Group, West Virginia University School of Medicine, Morgantown, WV, USA.,Toxicology Working Group, West Virginia University School of Medicine, Morgantown, WV, USA
| | - T R Nurkiewicz
- Mitochondria, Metabolism & Bioenergetics Working Group, West Virginia University School of Medicine, Morgantown, WV, USA. .,Toxicology Working Group, West Virginia University School of Medicine, Morgantown, WV, USA. .,Department of Physiology, Pharmacology, and Neuroscience, Robert C. Byrd Health Sciences Center, West Virginia University School of Medicine, 1 Medical Center Drive, Morgantown, WV, 26506-9229, USA.
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35
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Abebe T, Mahadevan J, Bogachus L, Hahn S, Black M, Oseid E, Urano F, Cirulli V, Robertson RP. Nrf2/antioxidant pathway mediates β cell self-repair after damage by high-fat diet-induced oxidative stress. JCI Insight 2017; 2:92854. [PMID: 29263299 DOI: 10.1172/jci.insight.92854] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 11/15/2017] [Indexed: 12/18/2022] Open
Abstract
Many theories have been advanced to better understand why β cell function and structure relentlessly deteriorate during the course of type 2 diabetes (T2D). These theories include inflammation, apoptosis, replication, neogenesis, autophagy, differentiation, dedifferentiation, and decreased levels of insulin gene regulatory proteins. However, none of these have considered the possibility that endogenous self-repair of existing β cells may be an important factor. To examine this hypothesis, we conducted studies with female Zucker diabetic fatty rats fed a high-fat diet (HFD) for 1, 2, 4, 7, 9, 18, or 28 days, followed by a return to regular chow for 2-3 weeks. Repair was defined as reversal of elevated blood glucose and of inappropriately low blood insulin levels caused by a HFD, as well as reversal of structural damage visualized by imaging studies. We observed evidence of functional β cell damage after a 9-day exposure to a HFD and then repair after 2-3 weeks of being returned to normal chow (blood glucose [BG] = 348 ± 30 vs. 126 ± 3; mg/dl; days 9 vs. 23 day, P < 0.01). After 18- and 28-day exposure to a HFD, damage was more severe and repair was less evident. Insulin levels progressively diminished with 9-day exposure to a HFD; after returning to a regular diet, insulin levels rebounded toward, but did not reach, normal values. Increase in β cell mass was 4-fold after 9 days and 3-fold after 18 days, and there was no increase after 28 days of a HFD. Increases in β cell mass during a HFD were not different when comparing values before and after a return to regular diet within the 9-, 18-, or 28-day studies. No changes were observed in apoptosis or β cell replication. Formation of intracellular markers of oxidative stress, intranuclear translocation of Nrf2, and formation of intracellular antioxidant proteins indicated the participation of HFD/oxidative stress induction of the Nrf2/antioxidant pathway. Flow cytometry-based assessment of β cell volume, morphology, and insulin-specific immunoreactivity, as well as ultrastructural analysis by transmission electron microscopy, revealed that short-term exposure to a HFD produced significant changes in β cell morphology and function that are reversible after returning to regular chow. These results suggest that a possible mechanism mediating the ability of β cells to self-repair after a short-term exposure to a HFD is the activation of the Nrf2/antioxidant pathway.
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Affiliation(s)
- Tsehay Abebe
- Pacific Northwest Diabetes Research Institute, Seattle, Washington, USA
| | - Jana Mahadevan
- Pacific Northwest Diabetes Research Institute, Seattle, Washington, USA.,Division of Metabolism, Endocrinology, and Nutrition, Department of Medicine, and.,Department of Pharmacology, University of Washington, Seattle, Washington, USA.,Department of Endocrinology, Metabolism, and Lipid Research, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Lindsey Bogachus
- Pacific Northwest Diabetes Research Institute, Seattle, Washington, USA.,Division of Metabolism, Endocrinology, and Nutrition, Department of Medicine, and.,Department of Pharmacology, University of Washington, Seattle, Washington, USA.,Division of Endocrinology and Metabolism, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Stephanie Hahn
- Pacific Northwest Diabetes Research Institute, Seattle, Washington, USA
| | - Michele Black
- Department of Immunology, University of Washington, Seattle, Washington, USA
| | - Elizabeth Oseid
- Pacific Northwest Diabetes Research Institute, Seattle, Washington, USA
| | - Fumihiko Urano
- Department of Endocrinology, Metabolism, and Lipid Research, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Vincenzo Cirulli
- Division of Metabolism, Endocrinology, and Nutrition, Department of Medicine, and.,Department of Pharmacology, University of Washington, Seattle, Washington, USA
| | - R Paul Robertson
- Pacific Northwest Diabetes Research Institute, Seattle, Washington, USA.,Division of Metabolism, Endocrinology, and Nutrition, Department of Medicine, and.,Department of Pharmacology, University of Washington, Seattle, Washington, USA.,Division of Endocrinology and Metabolism, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
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36
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Berezin AE. Cardiac biomarkers in diabetes mellitus: New dawn for risk stratification? Diabetes Metab Syndr 2017; 11 Suppl 1:S201-S208. [PMID: 28011232 DOI: 10.1016/j.dsx.2016.12.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 12/12/2016] [Indexed: 12/21/2022]
Abstract
Type 2 diabetes mellitus (T2DM) remains a leading cause of cardiovascular (CV) events and diseases worldwide. The aim of the review is to summarize our knowledge regarding clinical implementation of the biomarker-based strategy of the CV risk assessment in T2DM patient population. There is large body of evidence regarding use of the cardiac biomarkers to risk stratification at higher CV risk individuals who belongs to general population and cohort with established CV disease. Although T2DM patients have higher incidence of macrovascular and microvascular CV complications than the general population, whether cardiac biomarkers would be effective to risk stratification of the T2DM is not fully understood. The role of natriuretic peptides, galectin-3, interleukins, growth differentiation factor-15, as well as biomarkers of endothelial dysfunction are widely discussed. In conclusion, future directions, which associate with discovering of novel biomarkers and their best combinations to provide additional predictive information beyond other traditional CV risk factors, are discussed.
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Affiliation(s)
- Alexander E Berezin
- Private Hospital "Vita-Center", Zaporozhye, Ukraine; Internal Medicine Department, Medical University of Zaporozhye, Ukraine.
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37
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Semeraro ML, Glenn LM, Morris MA. The Four-Way Stop Sign: Viruses, 12-Lipoxygenase, Islets, and Natural Killer Cells in Type 1 Diabetes Progression. Front Endocrinol (Lausanne) 2017; 8:246. [PMID: 28993759 PMCID: PMC5622285 DOI: 10.3389/fendo.2017.00246] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 09/08/2017] [Indexed: 12/29/2022] Open
Abstract
Natural killer (NK) cells represent an important effector arm against viral infection, and mounting evidence suggests that viral infection plays a role in the development of type 1 diabetes (T1D) in at least a portion of patients. NK cells recognize their target cells through a delicate balance of inhibitory and stimulatory receptors on their surface. If unbalanced, NK cells have great potential to wreak havoc in the pancreas due to the beta cell expression of the as-yet-defined NKp46 ligand through interactions with the activating NKp46 receptor found on the surface of most NK cells. Blocking interactions between NKp46 and its ligand protects mice from STZ-induced diabetes, but differential expression non-diabetic and diabetic donor samples have not been tested. Additional studies have shown that peripheral blood NK cells from human T1D patients have altered phenotypes that reduce the lytic and functional ability of the NK cells. Investigations of humanT1D pancreas tissues have indicated that the presence of NK cells may be beneficial despite their infrequent detection. In non-obese diabetic (NOD) mice, we have noted that NK cells express high levels of the proinflammatory mediator 12/15-lipoxygenase (12/15-LO), and decreased levels of stimulatory receptors. Conversely, NK cells of 12/15-LO deficient NOD mice, which are protected from diabetes development, express significantly higher levels of stimulatory receptors. Furthermore, the human NK92 cell line expresses the ALOX12 protein [human 12-lipoxygenase (12-LO), related to mouse 12/15-LO] via Western blotting. Human 12-LO is upregulated in the pancreas of both T1D and T2D human donors with insulin-containing islets, showing a link between 12-LO expression and diabetes progression. Therefore, our hypothesis is that NK cells in those susceptible to developing T1D are unable to function properly during viral infections of pancreatic beta cells due to increased 12-LO expression and activation, which contributes to increased interferon-gamma production and an imbalance in activating and inhibitory NK cell receptors, and may contribute to downstream autoimmune T cell responses. The work presented here outlines evidence from our lab, as well as published literature, supporting our hypothesis, including novel data.
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Affiliation(s)
- Michele L. Semeraro
- Department of Internal Medicine, Strelitz Diabetes Center, Eastern Virginia Medical School, Norfolk, VA, United States
| | - Lindsey M. Glenn
- Department of Internal Medicine, Strelitz Diabetes Center, Eastern Virginia Medical School, Norfolk, VA, United States
| | - Margaret A. Morris
- Department of Internal Medicine, Strelitz Diabetes Center, Eastern Virginia Medical School, Norfolk, VA, United States
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38
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Černelič-Bizjak M, Jenko-Pražnikar Z. Body dissatisfaction predicts inflammatory status in asymptomatic healthy individuals. J Health Psychol 2017; 23:25-35. [PMID: 28810361 DOI: 10.1177/1359105316672923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Body dissatisfaction may play some role in the pathophysiology of chronic diseases. This study examined relations between body dissatisfaction and circulating levels of inflammatory biomarkers C-reactive protein, tumour necrosis factor-α, interleukin-6 and anti-inflammatory adiponectin, and to explore positive changes in relevant lifestyle behaviour after these associations. A total of 33 asymptomatic overweight men and women were evaluated at the baseline and after a 6-month lifestyle behaviour intervention. Body dissatisfaction emerged as an important predictor of pro- and anti-inflammatory biomarkers and may promote the production of inflammatory cytokines by reducing the level of anti-inflammatory and increasing the level of pro-inflammatory cytokine production.
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39
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Ma K, Xiao A, Park SH, Glenn L, Jackson L, Barot T, Weaver JR, Taylor-Fishwick DA, Luci DK, Maloney DJ, Mirmira RG, Imai Y, Nadler JL. 12-Lipoxygenase Inhibitor Improves Functions of Cytokine-Treated Human Islets and Type 2 Diabetic Islets. J Clin Endocrinol Metab 2017; 102:2789-2797. [PMID: 28609824 PMCID: PMC5546865 DOI: 10.1210/jc.2017-00267] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 05/03/2017] [Indexed: 12/21/2022]
Abstract
CONTEXT The 12-lipoxygenase (12-LO) pathway produces proinflammatory metabolites, and its activation is implicated in islet inflammation associated with type 1 and type 2 diabetes (T2D). OBJECTIVES We aimed to test the efficacy of ML355, a highly selective, small molecule inhibitor of 12-LO, for the preservation of islet function. DESIGN Human islets from nondiabetic donors were incubated with a mixture of tumor necrosis factor α , interluekin-1β, and interferon-γ to model islet inflammation. Cytokine-treated islets and human islets from T2D donors were incubated in the presence and absence of ML355. SETTING In vitro study. PARTICIPANTS Human islets from organ donors aged >20 years of both sexes and any race were used. T2D status was defined from either medical history or most recent hemoglobin A1c value >6.5%. INTERVENTION Glucose stimulation. MAIN OUTCOME MEASURES Static and dynamic insulin secretion and oxygen consumption rate (OCR). RESULTS ML355 prevented the reduction of insulin secretion and OCR in cytokine-treated human islets and improved both parameters in human islets from T2D donors. CONCLUSIONS ML355 was efficacious in improving human islet function after cytokine treatment and in T2D islets in vitro. The study suggests that the blockade of the 12-LO pathway may serve as a target for both form of diabetes and provides the basis for further study of this small molecule inhibitor in vivo.
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Affiliation(s)
- Kaiwen Ma
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, Virginia 23507
| | - An Xiao
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, Virginia 23507
| | - So Hyun Park
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, Virginia 23507
| | - Lindsey Glenn
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, Virginia 23507
| | - Laura Jackson
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, Virginia 23507
| | - Tatvam Barot
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, Virginia 23507
| | - Jessica R. Weaver
- Department of Microbiology & Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, Virginia 23507
| | - David A. Taylor-Fishwick
- Department of Microbiology & Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, Virginia 23507
| | - Diane K. Luci
- National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, Maryland 20850
| | - David J. Maloney
- National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, Maryland 20850
| | - Raghavendra G. Mirmira
- Department of Pediatrics, IU Center for Diabetes and Metabolic Disease, Indiana University School of Medicine, Indianapolis, Indiana 46202
- Departments of Biochemistry and Molecular Biology, Medicine, and Cellular and Integrative Physiology, IU Center for Diabetes and Metabolic Disease, Indiana University School of Medicine, Indianapolis, Indiana 46202
- Indiana Biosciences Research Institute, Indianapolis, Indiana 46202
| | - Yumi Imai
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, Virginia 23507
- Department of Internal Medicine, Fraternal Order of Eagles Diabetes Research Center, The University of Iowa Carver College of Medicine, Iowa City, Iowa 52242
| | - Jerry L. Nadler
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, Virginia 23507
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40
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Akash MSH, Rehman K, Liaqat A. Tumor Necrosis Factor-Alpha: Role in Development of Insulin Resistance and Pathogenesis of Type 2 Diabetes Mellitus. J Cell Biochem 2017; 119:105-110. [PMID: 28569437 DOI: 10.1002/jcb.26174] [Citation(s) in RCA: 323] [Impact Index Per Article: 46.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 05/31/2017] [Indexed: 12/12/2022]
Abstract
Pathogenesis of type 2 diabetes mellitus (T2DM) and development of insulin resistance are characterized by multi-stimuli factors notably glucolipotoxicity, generation of reactive oxygen species (ROS), epigenetic factors, activation of various transcriptional mediated pathways along with the augmented levels of various pro-inflammatory cytokines. Among the various pro-inflammatory cytokines, tumor necrosis factor-alpha (TNF-α) is one the most important pro-inflammatory mediator that is critically involved in the development of insulin resistance and pathogenesis of T2DM. TNF-α is mainly produced in adipocytes and/or peripheral tissues, and induces tissue-specific inflammation through the involvement of generation of ROS and activation of various transcriptional mediated pathways. The raised level of TNF-α induces insulin resistance in adipocytes and peripheral tissues by impairing the insulin signaling through serine phosphorylation that leads to the development of T2DM. Anti-TNF-α treatment strategies have been developed to reduce the incidence of insulin resistance and development of T2DM. In this article, we have briefly described how TNF-α plays crucial role to induce insulin resistance and pathogenesis of T2DM. To block the inflammatory responses by blocking TNF-α and TNF-α signaling may be an effective strategy for the treatment of insulin resistance and T2DM. J. Cell. Biochem. 119: 105-110, 2018. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
| | - Kanwal Rehman
- Institute of Pharmacy, Physiology and Pharmacology, University of Agriculture, Faisalabad, Pakistan
| | - Aamira Liaqat
- Department of Pharmaceutical Chemistry, Government College University, Faisalabad, Pakistan.,Department of Biochemistry, Government College University, Faisalabad, Pakistan
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41
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Key Role of STAT4 Deficiency in the Hematopoietic Compartment in Insulin Resistance and Adipose Tissue Inflammation. Mediators Inflamm 2017; 2017:5420718. [PMID: 28400678 PMCID: PMC5376449 DOI: 10.1155/2017/5420718] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Revised: 12/22/2016] [Accepted: 12/25/2016] [Indexed: 01/10/2023] Open
Abstract
Visceral adipose tissue (AT) inflammation is linked to the complications of obesity, including insulin resistance (IR) and type 2 diabetes. Recent data from our lab showed that germline deficiency in STAT4 reduces inflammation and improves IR in obese mice. The objective of this study was to determine the contribution of selective STAT4 deficiency in subsets of hematopoietic cells to IR and AT inflammation. To determine the contribution of hematopoietic lineage, we sublethally irradiated Stat4-/-C57Bl6 mice and reconstituted them with bone marrow cells (BMC) from Stat4+/+C57Bl6 congenic donors. We also established the contribution of selective STAT4 deficiency in CD4+ or CD8+ T cells using adoptive transfer in Rag1-/- mice. All mice received a HFD for 15 weeks (n = 7-12 mice/group). BMC that expressed STAT4 induced increases in glucose intolerance and IR compared to STAT4-deficient cells. Also, AT inflammation was increased and the numbers of CD8+ cells infiltrating AT were higher in mice with STAT4 expressing BMC. Studies in Rag1-/- mice further confirmed the prominent role of CD8+ cells expressing STAT4 in insulin resistance and AT and islet inflammation. Collectively our results show specific and dominant contribution of STAT4 in the hematopoietic compartment to metabolic health and inflammation in diet-induced obesity.
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Cunnion KM, Krishna NK, Pallera HK, Pineros-Fernandez A, Rivera MG, Hair PS, Lassiter BP, Huyck R, Clements MA, Hood AF, Rodeheaver GT, Cottler PS, Nadler JL, Dobrian AD. Complement Activation and STAT4 Expression Are Associated with Early Inflammation in Diabetic Wounds. PLoS One 2017; 12:e0170500. [PMID: 28107529 PMCID: PMC5249255 DOI: 10.1371/journal.pone.0170500] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 12/16/2016] [Indexed: 12/15/2022] Open
Abstract
Diabetic non-healing wounds are a major clinical problem. The mechanisms leading to poor wound healing in diabetes are multifactorial but unresolved inflammation may be a major contributing factor. The complement system (CS) is the most potent inflammatory cascade in humans and contributes to poor wound healing in animal models. Signal transducer and activator of transcription 4 (STAT4) is a transcription factor expressed in immune and adipose cells and contributes to upregulation of some inflammatory chemokines and cytokines. Persistent CS and STAT4 expression in diabetic wounds may thus contribute to chronic inflammation and delayed healing. The purpose of this study was to characterize CS and STAT4 in early diabetic wounds using db/db mice as a diabetic skin wound model. The CS was found to be activated early in the diabetic wounds as demonstrated by increased anaphylatoxin C5a in wound fluid and C3-fragment deposition by immunostaining. These changes were associated with a 76% increase in nucleated cells in the wounds of db/db mice vs. CONTROLS The novel classical CS inhibitor, Peptide Inhibitor of Complement C1 (PIC1) reduced inflammation when added directly or saturated in an acellular skin scaffold, as reflected by reduced CS components and leukocyte infiltration. A significant increase in expression of STAT4 and the downstream macrophage chemokine CCL2 and its receptor CCR2 were also found in the early wounds of db/db mice compared to non-diabetic controls. These studies provide evidence for two new promising targets to reduce unresolved inflammation and to improve healing of diabetic skin wounds.
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Affiliation(s)
- Kenji M. Cunnion
- Department of Pediatrics, Eastern Virginia Medical School, Norfolk, VA, United States of America
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, VA, United States of America
- Children’s Specialty Group, Children’s Hospital of The King’s Daughters, Norfolk, VA, United States of America
| | - Neel K. Krishna
- Department of Pediatrics, Eastern Virginia Medical School, Norfolk, VA, United States of America
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, VA, United States of America
| | - Haree K. Pallera
- Department of Pediatrics, Eastern Virginia Medical School, Norfolk, VA, United States of America
| | - Angela Pineros-Fernandez
- Department of Plastic Surgery, University of Virginia, Charlottesville, VA, United States of America
| | - Magdielis Gregory Rivera
- Department of Pediatrics, Eastern Virginia Medical School, Norfolk, VA, United States of America
| | - Pamela S. Hair
- Department of Pediatrics, Eastern Virginia Medical School, Norfolk, VA, United States of America
| | - Brittany P. Lassiter
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, VA, United States of America
| | - Ryan Huyck
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, United States of America
| | - Mary A. Clements
- Department of Dermatology, Eastern Virginia Medical School, Norfolk, VA, United States of America
- Department of Pathology, Eastern Virginia Medical School, Norfolk, VA, United States of America
| | - Antoinette F. Hood
- Department of Dermatology, Eastern Virginia Medical School, Norfolk, VA, United States of America
- Department of Pathology, Eastern Virginia Medical School, Norfolk, VA, United States of America
| | - George T. Rodeheaver
- Department of Plastic Surgery, University of Virginia, Charlottesville, VA, United States of America
| | - Patrick S. Cottler
- Department of Plastic Surgery, University of Virginia, Charlottesville, VA, United States of America
- * E-mail:
| | - Jerry L. Nadler
- Department of Internal Medicine, Strelitz Diabetes Center, Eastern Virginia Medical School, Norfolk, VA, United States of America
| | - Anca D. Dobrian
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, United States of America
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43
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Stafeev IS, Vorotnikov AV, Ratner EI, Menshikov MY, Parfyonova YV. Latent Inflammation and Insulin Resistance in Adipose Tissue. Int J Endocrinol 2017; 2017:5076732. [PMID: 28912810 PMCID: PMC5585607 DOI: 10.1155/2017/5076732] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 07/17/2017] [Indexed: 02/06/2023] Open
Abstract
Obesity is a growing problem in modern society and medicine. It closely associates with metabolic disorders such as type 2 diabetes mellitus (T2DM) and hepatic and cardiovascular diseases such as nonalcoholic fatty liver disease, atherosclerosis, myocarditis, and hypertension. Obesity is often associated with latent inflammation; however, the link between inflammation, obesity, T2DM, and cardiovascular diseases is still poorly understood. Insulin resistance is the earliest feature of metabolic disorders. It mostly develops as a result of dysregulated insulin signaling in insulin-sensitive cells, as compared to inactivating mutations in insulin receptor or signaling proteins that occur relatively rare. Here, we argue that inflammatory signaling provides a link between latent inflammation, obesity, insulin resistance, and metabolic disorders. We further hypothesize that insulin-activated PI3-kinase pathway and inflammatory signaling mediated by several IκB kinases may constitute negative feedback leading to insulin resistance at least in the fat tissue. Finally, we discuss perspectives for anti-inflammatory therapies in treating the metabolic diseases.
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Affiliation(s)
- I. S. Stafeev
- Russian Cardiology Research and Production Centre, Moscow 121552, Russia
- Faculty of Basic Medicine, M.V. Lomonosov Moscow State University, Moscow 119192, Russia
- *I. S. Stafeev:
| | - A. V. Vorotnikov
- Russian Cardiology Research and Production Centre, Moscow 121552, Russia
- M.V. Lomonosov Moscow State University Medical Center, Moscow 119192, Russia
| | - E. I. Ratner
- Russian Cardiology Research and Production Centre, Moscow 121552, Russia
- Endocrinology Research Centre, Moscow 117031, Russia
| | - M. Y. Menshikov
- Russian Cardiology Research and Production Centre, Moscow 121552, Russia
| | - Ye. V. Parfyonova
- Russian Cardiology Research and Production Centre, Moscow 121552, Russia
- Faculty of Basic Medicine, M.V. Lomonosov Moscow State University, Moscow 119192, Russia
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44
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Novel Biomarkers at Risk Stratification of Diabetes Mellitus Patients. STEM CELLS IN CLINICAL APPLICATIONS 2017. [DOI: 10.1007/978-3-319-55687-1_6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Pepe GJ, Maniu A, Aberdeen G, Lynch TJ, Kim SO, Nadler J, Albrecht ED. Insulin resistance elicited in postpubertal primate offspring deprived of estrogen in utero. Endocrine 2016; 54:788-797. [PMID: 27770396 PMCID: PMC6038696 DOI: 10.1007/s12020-016-1145-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 10/05/2016] [Indexed: 12/25/2022]
Abstract
We recently demonstrated that offspring delivered to baboons deprived of estrogen during the second half of gestation exhibited insulin resistance prior to onset of puberty. Because gonadal hormones have a profound effect on insulin action and secretion in adults, we determined whether insulin resistance is retained after initiation of gonadal secretion of testosterone and estradiol. Glucose tolerance tests were performed in postpubertal baboon offspring of untreated and letrozole-treated animals (serum estradiol reduced >95 %). Basal fasting levels of insulin (P < 0.05) and peak 1 min and 1 + 3 + 5 min levels of glucose after glucose tolerance tests challenge (P < 0.03) were greater in offspring delivered to letrozole-treated, estrogen-deprived baboons than untreated animals. Moreover, the value for the HOMA-IR, an accepted index of insulin resistance, was 2-fold greater (P < 0.05) in offspring delivered to baboons treated with letrozole than in untreated animals. Collectively these results support the proposal that estrogen normally has an important role in programming mechanisms in utero within the developing fetus that lead to insulin sensitivity after birth.
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Affiliation(s)
- Gerald J Pepe
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, USA.
| | - Adina Maniu
- Department of Obstetrics/Gynecology/Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Graham Aberdeen
- Department of Obstetrics/Gynecology/Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Terrie J Lynch
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, USA
| | - Soon Ok Kim
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, USA
| | - Jerry Nadler
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, VA, USA
| | - Eugene D Albrecht
- Departments of Obstetrics/Gynecology/Reproductive Sciences and Physiology, University of Maryland School of Medicine, Baltimore, MD, USA
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46
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Shi Q, Xu J, Huo N, Cai C, Liu H. Does a higher glycemic level lead to a higher rate of dental implant failure? J Am Dent Assoc 2016; 147:875-881. [DOI: 10.1016/j.adaj.2016.06.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 06/02/2016] [Accepted: 06/03/2016] [Indexed: 01/15/2023]
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47
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Liu S, Smith EM, King TH, Glenn L, Trevino M, Park SH, Machida Y, Villaflor C, Grzesik W, Morris MA, Imai Y, Nadler JL. Host Factors Alter Effects of Angiopoietin-Like Protein 8 on Glucose Homeostasis in Diabetic Mice. ACTA ACUST UNITED AC 2016; 6:277-290. [PMID: 31741751 PMCID: PMC6859639 DOI: 10.4236/jdm.2016.64029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Recovery of functional beta cell mass offers a biological cure for type 1 diabetes. However, beta cell mass is difficult to regain once lost since the proliferation rate of beta cells after youth is very low. Angiopoietin like-protein 8 (ANGPTL8), a peptide that has a role in the regulation of lipoprotein lipase activity, was reported to increase beta cell proliferation in mice in 2013. Subsequent studies of human ANGPTL8 for short term (3 to 8 days) in non-diabetic mice showed little or no increase in beta cell proliferation. Here, we examined the effect of ANGPTL8 on glucose homeostasis in models that have not been examined previously. We expressed mouse ANGPTL8 using adenovirus in 2 mouse models of diabetes (streptozotocin and Non-Obese Diabetic (NOD) mice) over 2 weeks. Also, we tested ANGPTL8 in NOD mice deficient in leukocyte 12-lipoxygenase (12LO), an enzyme that contributes to insulitis and loss of beta cell function in NOD, in an effort to determine whether 12LO deficiency alters the response to ANGPTL8. Adenovirus-mediated expression of ANGPTL8 lowered blood glucose levels in streptozotocin treated mice without an increase in beta cell proliferation or serum insulin concentration. While ANGPTL8 did not reverse hyperglycemia in overtly hyperglycemic NOD mice or alter glucose homeostasis of non-diabetic NOD mice, ANGPTL8 reduced blood glucose levels in 12LOKO NOD mice. However, the lower glucose levels in 12LOKO NOD were not associated with higher serum insulin levels or beta cell proliferation. In summary, while mouse ANGPTL8 does not increase beta cell proliferation in NOD mice or streptozotocin treated mice in agreement with studies in non-diabetic mice, it lowers blood glucose levels in multiple low-dose streptozotocin induced diabetes and 12LO deficiency indicating that host factors influence the impact of ANGPTL8 on glucose homeostasis.
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Affiliation(s)
- Sichen Liu
- Eastern Virginia Medical School, Department of Internal Medicine, Strelitz Diabetes Center, Norfolk, VA, USA
| | - Emily M Smith
- Eastern Virginia Medical School, Department of Internal Medicine, Strelitz Diabetes Center, Norfolk, VA, USA
| | - Timothy H King
- Eastern Virginia Medical School, Department of Internal Medicine, Strelitz Diabetes Center, Norfolk, VA, USA
| | - Lindsey Glenn
- Eastern Virginia Medical School, Department of Internal Medicine, Strelitz Diabetes Center, Norfolk, VA, USA
| | - Michelle Trevino
- Eastern Virginia Medical School, Department of Internal Medicine, Strelitz Diabetes Center, Norfolk, VA, USA
| | - So Hyun Park
- Eastern Virginia Medical School, Department of Internal Medicine, Strelitz Diabetes Center, Norfolk, VA, USA
| | - Yui Machida
- Eastern Virginia Medical School, Department of Internal Medicine, Strelitz Diabetes Center, Norfolk, VA, USA
| | - Ciriaco Villaflor
- Eastern Virginia Medical School, Department of Internal Medicine, Strelitz Diabetes Center, Norfolk, VA, USA
| | - Wojciech Grzesik
- Eastern Virginia Medical School, Department of Internal Medicine, Strelitz Diabetes Center, Norfolk, VA, USA
| | - Margaret A Morris
- Eastern Virginia Medical School, Department of Internal Medicine, Strelitz Diabetes Center, Norfolk, VA, USA
| | - Yumi Imai
- Eastern Virginia Medical School, Department of Internal Medicine, Strelitz Diabetes Center, Norfolk, VA, USA.,Department of Internal Medicine, Fraternal Order of Eagles Diabetes Research Center, The University of Iowa Carver College of Medicine, Iowa City, IA, USA
| | - Jerry L Nadler
- Eastern Virginia Medical School, Department of Internal Medicine, Strelitz Diabetes Center, Norfolk, VA, USA
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Taga M, Minett T, Classey J, Matthews FE, Brayne C, Ince PG, Nicoll JA, Hugon J, Boche D. Metaflammasome components in the human brain: a role in dementia with Alzheimer's pathology? Brain Pathol 2016; 27:266-275. [PMID: 27106634 PMCID: PMC5412675 DOI: 10.1111/bpa.12388] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 04/19/2016] [Indexed: 12/17/2022] Open
Abstract
Epidemiological and genetic studies have identified metabolic disorders and inflammation as risk factors for Alzheimer's disease (AD). Evidence in obesity and type-2 diabetes suggests a role for a metabolic inflammasome ("metaflammasome") in mediating chronic inflammation in peripheral organs implicating IKKβ (inhibitor of nuclear factor kappa-B kinase subunit beta), IRS1 (insulin receptor substrate 1), JNK (c-jun N-terminal kinase), and PKR (double-stranded RNA protein kinase). We hypothesized that these proteins are expressed in the brain in response to metabolic risk factors in AD. Neocortex from 299 participants from the MRC Cognitive Function and Ageing Studies was analysed by immunohistochemistry for the expression of the phosphorylated (active) form of IKKβ [pSer176/180 ], IRS1 [pS312 ], JNK [pThr183 /Tyr185 ] and PKR [pT451 ]. The data were analyzed to investigate whether the proteins were expressed together and in relation with metabolic disorders, dementia, Alzheimer's pathology and APOE genotype. We observed a change from a positive to a negative association between the proteins and hypertension according to the dementia status. Type-2 diabetes was negatively related with the proteins among participants without dementia; whereas participants with dementia and AD pathology showed a positive association with JNK. A significant association between IKKβ and JNK in participants with dementia and AD pathology was observed, but not in those without dementia. Otherwise, weak to moderate associations were observed among the protein loads. The presence of dementia was significantly associated with JNK and negatively associated with IKKβ and IRS1. Cognitive scores showed a significant positive relationship with IKKβ and a negative with IRS1, JNK and PKR. The proteins were significantly associated with pathology in Alzheimer's participants with the relationship being inverse or not significant in participants without dementia. Expression of the proteins was not related to APOE genotype. These findings highlight a role for these proteins in AD pathophysiology but not necessarily as a complex.
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Affiliation(s)
- Mariko Taga
- Clinical Neurosciences, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, UK.,INSERM U942, Paris, France
| | - Thais Minett
- Department of Public Health and Primary Care, Institute of Public Health, University of Cambridge, Cambridge, UK.,Department of Radiology, University of Cambridge, Cambridge, UK
| | - John Classey
- Clinical Neurosciences, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Fiona E Matthews
- MRC Biostatistics Unit, Cambridge Institute of Public Health, Cambridge, UK
| | - Carol Brayne
- Department of Public Health and Primary Care, Institute of Public Health, University of Cambridge, Cambridge, UK
| | - Paul G Ince
- Department of Neuroscience, Sheffield Institute for Translational Neuroscience, Sheffield University, Sheffield, UK
| | - James Ar Nicoll
- Clinical Neurosciences, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, UK.,Department of Cellular Pathology, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Jacques Hugon
- INSERM U942, Paris, France.,University of Paris Diderot, Sorbonne Paris Cité, Paris, France.,Centre Memoire de Ressources et de Recherche Paris Nord Ile de France AP-HP, Hôpital Lariboisière, Paris, France
| | - Delphine Boche
- Clinical Neurosciences, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, UK
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Dai C, Kayton NS, Shostak A, Poffenberger G, Cyphert HA, Aramandla R, Thompson C, Papagiannis IG, Emfinger C, Shiota M, Stafford JM, Greiner DL, Herrera PL, Shultz LD, Stein R, Powers AC. Stress-impaired transcription factor expression and insulin secretion in transplanted human islets. J Clin Invest 2016; 126:1857-70. [PMID: 27064285 DOI: 10.1172/jci83657] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 02/24/2016] [Indexed: 12/11/2022] Open
Abstract
Type 2 diabetes is characterized by insulin resistance, hyperglycemia, and progressive β cell dysfunction. Excess glucose and lipid impair β cell function in islet cell lines, cultured rodent and human islets, and in vivo rodent models. Here, we examined the mechanistic consequences of glucotoxic and lipotoxic conditions on human islets in vivo and developed and/or used 3 complementary models that allowed comparison of the effects of hyperglycemic and/or insulin-resistant metabolic stress conditions on human and mouse islets, which responded quite differently to these challenges. Hyperglycemia and/or insulin resistance impaired insulin secretion only from human islets in vivo. In human grafts, chronic insulin resistance decreased antioxidant enzyme expression and increased superoxide and amyloid formation. In human islet grafts, expression of transcription factors NKX6.1 and MAFB was decreased by chronic insulin resistance, but only MAFB decreased under chronic hyperglycemia. Knockdown of NKX6.1 or MAFB expression in a human β cell line recapitulated the insulin secretion defect seen in vivo. Contrary to rodent islet studies, neither insulin resistance nor hyperglycemia led to human β cell proliferation or apoptosis. These results demonstrate profound differences in how excess glucose or lipid influence mouse and human insulin secretion and β cell activity and show that reduced expression of key islet-enriched transcription factors is an important mediator of glucotoxicity and lipotoxicity.
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50
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Imai Y, Dobrian AD, Morris MA, Taylor-Fishwick DA, Nadler JL. Lipids and immunoinflammatory pathways of beta cell destruction. Diabetologia 2016; 59:673-8. [PMID: 26868492 PMCID: PMC4779407 DOI: 10.1007/s00125-016-3890-y] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 12/30/2015] [Indexed: 12/18/2022]
Abstract
Islet inflammation contributes to beta cell demise in both type 1 and type 2 diabetes. 12-Lipoxygenase (12-LO, gene expressed as ALOX12 in humans and 12-Lo in rodents in this manuscript) produces proinflammatory metabolites such as 12(S)-hydroxyeicosatetraenoic acids through dioxygenation of polyunsaturated fatty acids. 12-LO was first implicated in diabetes when the increase in 12-Lo expression and 12(S)-hydroxyeicosatetraenoic acid was noted in rodent models of diabetes. Subsequently, germline 12-Lo (-/-) was shown to prevent the development of hyperglycemia in mouse models of type 1 diabetes and in high-fat fed mice. More recently, beta cell-specific 12-Lo (-/-) was shown to protect mice against hyperglycaemia after streptozotocin and a high-fat diet. In humans, 12-LO expression is increased in pancreatic islets of autoantibody-positive, type 1 diabetic and type 2 diabetic organ donors. Interestingly, the high expression of ALOX12 is associated with the alteration in first-phase glucose-stimulated insulin secretion in human type 2 diabetic islets. To further clarify the role of islet 12-LO in diabetes and to validate 12-LO as a therapeutic target of diabetes, we have studied selective pharmacological inhibitors for 12-LO. The compounds we have identified show promise: they protect beta cell lines and human islets from apoptosis and preserve insulin secretion when challenged by proinflammatory cytokine mixture. Currently studies are underway to test the compounds in mouse models of diabetes. This review summarises a presentation given at the 'Islet inflammation in type 2 diabetes' symposium at the 2015 annual meeting of the EASD. It is accompanied two other mini-reviews on topics from this symposium (by Simone Baltrusch, DOI: 10.1007/s00125-016-3891-x and Marc Donath, DOI: 10.1007/s00125-016-3873-z ) and a commentary by the Session Chair, Piero Marchetti (DOI: 10.1007/s00125-016-3875-x ).
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Affiliation(s)
- Yumi Imai
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, VA, 23507, USA.
| | - Anca D Dobrian
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, USA
| | - Margaret A Morris
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, VA, 23507, USA
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, VA, USA
| | - David A Taylor-Fishwick
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, VA, USA
| | - Jerry L Nadler
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, VA, 23507, USA.
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