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Abu-Nejem R, Hannon TS. Insulin Dynamics and Pathophysiology in Youth-Onset Type 2 Diabetes. J Clin Endocrinol Metab 2024; 109:2411-2421. [PMID: 38963882 DOI: 10.1210/clinem/dgae463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2024] [Revised: 06/28/2024] [Accepted: 07/03/2024] [Indexed: 07/06/2024]
Abstract
Youth-onset type 2 diabetes (T2D) is increasing around the globe. The mounting disease burden of youth-onset T2D portends substantial consequences for the health outcomes of young people and for health care systems. The pathophysiology of this condition is characterized by insulin resistance and initial insulin hypersecretion ± an inherent insulin secretory defect, with progressive loss of stimulated insulin secretion leading to pancreatic β-cell failure. Research studies focusing on youth-onset T2D have illuminated key differences for youth- vs adult-onset T2D, with youth having more profound insulin resistance and quicker progression to loss of sufficient insulin secretion to maintain euglycemia. There is a need for therapies that are targeted to improve both insulin resistance and, importantly, maintain sufficient insulin secretory function over the lifespan in youth-onset T2D.
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Affiliation(s)
- Rozan Abu-Nejem
- Department of Pediatrics, Divisions of Pediatric Endocrinology and Diabetology and Pediatric Health Services Research, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Tamara S Hannon
- Department of Pediatrics, Divisions of Pediatric Endocrinology and Diabetology and Pediatric Health Services Research, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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2
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Hwang SM, Kim TY, Kim A, Kim YG, Park JW, Lee JM, Kim JY, Suh JY. Resveratrol facilitates bone formation in high-glucose conditions. Front Physiol 2024; 15:1347756. [PMID: 38706943 PMCID: PMC11066205 DOI: 10.3389/fphys.2024.1347756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 04/05/2024] [Indexed: 05/07/2024] Open
Abstract
Periodontitis is known to be affected by high-glucose conditions, which poses a challenge to periodontal tissue regeneration, particularly in bone formation. In this study, the potential effects of resveratrol (3,5,4'-trihydroxystilbene, RSV) in facilitating bone formation under high-glucose conditions after periodontitis has been investigated. We focused on the analysis of osteoblasts and periodontal ligament cells, which are essential for bone formation including cell proliferation and differentiation. And we aimed to investigate the impact of RSV on bone healing, employed diabetic mouse model induced by streptozotocin and confirmed through histological observation. High-glucose conditions adversely affected cell proliferation and ALP activity in both MC3T3-E1 and hPDLF in vitro, with more significant impact on MC3T3-E1 cells. RSV under high-glucose conditions had positive effects on both, showing early-stage effects for MC3T3-E1 cells and later-stage effects for hPDLF cells. RSV seemed to have a more pronounced rescuing role in MC3T3-E1 cells. Increased ALP activity was observed and the expression levels of significant genes, such as Col 1, TGF-β1, ALP, and OC, in osteogenic differentiation were exhibited stage-specific expression patterns. Upregulated Col 1 and TGF-β1 were detected in the early stage, and then ALP and OC expressions became more pronounced in the later stages. Similarly, stronger positive reactions against RUNX2 were detected in the RSV-treated group compared to the control. Furthermore, in in vivo experiment, RSV stimulates the growth and differentiation of osteoblasts, thereby promoting bone formation. High-glucose levels have the potential to impair cellular functions and the regenerative capacity to facilitate bone formation with MC3T3-E1 rather than hPDLF cells. Resveratrol appears to facilitate the inherent abilities of MC3T3-E1 cells compared with hPDLF cells, indicating its potential capacity to restore functionality during periodontal regeneration.
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Affiliation(s)
- Sung-Min Hwang
- Department of Periodontology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Tae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Anna Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Yong-Gun Kim
- Department of Periodontology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Jin-Woo Park
- Department of Periodontology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Jae-Mok Lee
- Department of Periodontology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Jae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Jo-Young Suh
- Department of Periodontology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
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Zhu J, Zhou Y, Jin B, Shu J. Role of estrogen in the regulation of central and peripheral energy homeostasis: from a menopausal perspective. Ther Adv Endocrinol Metab 2023; 14:20420188231199359. [PMID: 37719789 PMCID: PMC10504839 DOI: 10.1177/20420188231199359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 08/16/2023] [Indexed: 09/19/2023] Open
Abstract
Estrogen plays a prominent role in regulating and coordinating energy homeostasis throughout the growth, development, reproduction, and aging of women. Estrogen receptors (ERs) are widely expressed in the brain and nearly all tissues of the body. Within the brain, central estrogen via ER regulates appetite and energy expenditure and maintains cell glucose metabolism, including glucose transport, aerobic glycolysis, and mitochondrial function. In the whole body, estrogen has shown beneficial effects on weight control, fat distribution, glucose and insulin resistance, and adipokine secretion. As demonstrated by multiple in vitro and in vivo studies, menopause-related decline of circulating estrogen may induce the disturbance of metabolic signals and a significant decrease in bioenergetics, which could trigger an increased incidence of late-onset Alzheimer's disease, type 2 diabetes mellitus, hypertension, and cardiovascular diseases in postmenopausal women. In this article, we have systematically reviewed the role of estrogen and ERs in body composition and lipid/glucose profile variation occurring with menopause, which may provide a better insight into the efficacy of hormone therapy in maintaining energy metabolic homeostasis and hold a clue for development of novel therapeutic approaches for target tissue diseases.
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Affiliation(s)
- Jing Zhu
- Center for Reproductive Medicine, Department of Reproductive Endocrinology, Zhejiang Provincial People’s Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Yier Zhou
- Center for Reproductive Medicine, Department of Reproductive Endocrinology, Zhejiang Provincial People’s Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Bihui Jin
- Center for Reproductive Medicine, Department of Reproductive Endocrinology, Zhejiang Provincial People’s Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Jing Shu
- Reproductive Medicine Center, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310006, China
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4
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Lesko MA, Chandrashekarappa DG, Jordahl EM, Oppenheimer KG, Bowman RW, Shang C, Durrant JD, Schmidt MC, O’Donnell AF. Changing course: Glucose starvation drives nuclear accumulation of Hexokinase 2 in S. cerevisiae. PLoS Genet 2023; 19:e1010745. [PMID: 37196001 PMCID: PMC10228819 DOI: 10.1371/journal.pgen.1010745] [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] [Received: 02/27/2023] [Revised: 05/30/2023] [Accepted: 04/14/2023] [Indexed: 05/19/2023] Open
Abstract
Glucose is the preferred carbon source for most eukaryotes, and the first step in its metabolism is phosphorylation to glucose-6-phosphate. This reaction is catalyzed by hexokinases or glucokinases. The yeast Saccharomyces cerevisiae encodes three such enzymes, Hxk1, Hxk2, and Glk1. In yeast and mammals, some isoforms of this enzyme are found in the nucleus, suggesting a possible moonlighting function beyond glucose phosphorylation. In contrast to mammalian hexokinases, yeast Hxk2 has been proposed to shuttle into the nucleus in glucose-replete conditions, where it reportedly moonlights as part of a glucose-repressive transcriptional complex. To achieve its role in glucose repression, Hxk2 reportedly binds the Mig1 transcriptional repressor, is dephosphorylated at serine 15 and requires an N-terminal nuclear localization sequence (NLS). We used high-resolution, quantitative, fluorescent microscopy of live cells to determine the conditions, residues, and regulatory proteins required for Hxk2 nuclear localization. Countering previous yeast studies, we find that Hxk2 is largely excluded from the nucleus under glucose-replete conditions but is retained in the nucleus under glucose-limiting conditions. We find that the Hxk2 N-terminus does not contain an NLS but instead is necessary for nuclear exclusion and regulating multimerization. Amino acid substitutions of the phosphorylated residue, serine 15, disrupt Hxk2 dimerization but have no effect on its glucose-regulated nuclear localization. Alanine substation at nearby lysine 13 affects dimerization and maintenance of nuclear exclusion in glucose-replete conditions. Modeling and simulation provide insight into the molecular mechanisms of this regulation. In contrast to earlier studies, we find that the transcriptional repressor Mig1 and the protein kinase Snf1 have little effect on Hxk2 localization. Instead, the protein kinase Tda1 regulates Hxk2 localization. RNAseq analyses of the yeast transcriptome dispels the idea that Hxk2 moonlights as a transcriptional regulator of glucose repression, demonstrating that Hxk2 has a negligible role in transcriptional regulation in both glucose-replete and limiting conditions. Our studies define a new model of cis- and trans-acting regulators of Hxk2 dimerization and nuclear localization. Based on our data, the nuclear translocation of Hxk2 in yeast occurs in glucose starvation conditions, which aligns well with the nuclear regulation of mammalian orthologs. Our results lay the foundation for future studies of Hxk2 nuclear activity.
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Affiliation(s)
- Mitchell A. Lesko
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Dakshayini G. Chandrashekarappa
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Eric M. Jordahl
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Katherine G. Oppenheimer
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Ray W. Bowman
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Chaowei Shang
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Jacob D. Durrant
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Martin C. Schmidt
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Allyson F. O’Donnell
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
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5
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Guo H, Wu H, Li Z. The Pathogenesis of Diabetes. Int J Mol Sci 2023; 24:ijms24086978. [PMID: 37108143 PMCID: PMC10139109 DOI: 10.3390/ijms24086978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/30/2023] [Accepted: 04/05/2023] [Indexed: 04/29/2023] Open
Abstract
Diabetes is the most common metabolic disorder, with an extremely serious effect on health systems worldwide. It has become a severe, chronic, non-communicable disease after cardio-cerebrovascular diseases. Currently, 90% of diabetic patients suffer from type 2 diabetes. Hyperglycemia is the main hallmark of diabetes. The function of pancreatic cells gradually declines before the onset of clinical hyperglycemia. Understanding the molecular processes involved in the development of diabetes can provide clinical care with much-needed updates. This review provides the current global state of diabetes, the mechanisms involved in glucose homeostasis and diabetic insulin resistance, and the long-chain non-coding RNA (lncRNA) associated with diabetes.
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Affiliation(s)
- Huiqin Guo
- Institute of Biotechnology, The Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, Taiyuan 030006, China
| | - Haili Wu
- College of Life Science, Shanxi University, Taiyuan 030006, China
| | - Zhuoyu Li
- Institute of Biotechnology, The Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, Taiyuan 030006, China
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Setayesh-Mehr Z, Ghasemi LV, Poorsargol M, Momeni R. Upregulation of GLUT4 Expression and Glucose Homeostasis by Synthetic Peptides HL-7 and HL-10 in in-vitro and in-vivo Diabetic Models. Int J Pept Res Ther 2023. [DOI: 10.1007/s10989-023-10507-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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Zhang D, Zhong X, Cheng C, Su Z, Xue Y, Liu Y, Zhang Y, Feng M, Xu Z, Zhao T, Zhang L, Huang H, Li W, Li X. Effect of Vitamin D and/or Calcium Supplementation on Pancreatic β-Cell Function in Subjects with Prediabetes: A Randomized, Controlled Trial. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:347-357. [PMID: 36541437 DOI: 10.1021/acs.jafc.2c05469] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
So far, the potential role of vitamin D in β-cell function remains a matter of debate. Therefore, a randomized, placebo-controlled trial (RCT) was conducted to evaluate the effect of a vitamin D supplement with or without calcium on β-cell function in a Chinese population with prediabetes. Two hundred and forty-three subjects were randomly assigned in a 2-by-2 factorial-design RCT to receive either 1600 IU/day vitamin D3 with/or 500 mg/day calcium for 24 weeks. The results showed that oral administration of vitamin D and calcium could increase the secretion of insulin. Vitamin D-insufficient individuals displayed an increment in the disposition index (adjusted change = 0.31, 95%CI: 0.07, 0.56) after treatment by vitamin D + calcium. It illustrated that supplementation with vitamin D and calcium might improve the function of pancreatic β-cell in prediabetes with low serum 25(OH)D levels. However, further studies are needed to confirm the findings. Given the low vitamin D content in natural foods, it is necessary to fortify processed foods with vitamin D.
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Affiliation(s)
- Dongdong Zhang
- Department of Nutrition and Food Hygiene, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Xiaoqin Zhong
- Sinopharm Xingsha Pharmaceuticals (Xiamen) Co., Ltd., Xiamen, Fujian 361026, China
| | - Cheng Cheng
- Department of Epidemiology and Health Statistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Zhiwei Su
- Sinopharm Xingsha Pharmaceuticals (Xiamen) Co., Ltd., Xiamen, Fujian 361026, China
| | - Yuan Xue
- Department of Nutrition and Food Hygiene, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Yaping Liu
- Department of Nutrition and Food Hygiene, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Yujing Zhang
- Department of Nutrition and Food Hygiene, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Mingming Feng
- Department of Nutrition and Food Hygiene, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Ze Xu
- Department of Nutrition and Food Hygiene, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Tong Zhao
- Department of Nutrition and Food Hygiene, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Luoya Zhang
- Department of Nutrition and Food Hygiene, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Haoyue Huang
- Department of Nutrition and Food Hygiene, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Wenjie Li
- Department of Nutrition and Food Hygiene, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Xing Li
- Department of Nutrition and Food Hygiene, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, China
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Guo Z, Li P, Ge J, Li H. SIRT6 in Aging, Metabolism, Inflammation and Cardiovascular Diseases. Aging Dis 2022; 13:1787-1822. [PMID: 36465178 PMCID: PMC9662279 DOI: 10.14336/ad.2022.0413] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 04/13/2022] [Indexed: 07/28/2023] Open
Abstract
As an important NAD+-dependent enzyme, SIRT6 has received significant attention since its discovery. In view of observations that SIRT6-deficient animals exhibit genomic instability and metabolic disorders and undergo early death, SIRT6 has long been considered a protein of longevity. Recently, growing evidence has demonstrated that SIRT6 functions as a deacetylase, mono-ADP-ribosyltransferase and long fatty deacylase and participates in a variety of cellular signaling pathways from DNA damage repair in the early stage to disease progression. In this review, we elaborate on the specific substrates and molecular mechanisms of SIRT6 in various physiological and pathological processes in detail, emphasizing its links to aging (genomic damage, telomere integrity, DNA repair), metabolism (glycolysis, gluconeogenesis, insulin secretion and lipid synthesis, lipolysis, thermogenesis), inflammation and cardiovascular diseases (atherosclerosis, cardiac hypertrophy, heart failure, ischemia-reperfusion injury). In addition, the most recent advances regarding SIRT6 modulators (agonists and inhibitors) as potential therapeutic agents for SIRT6-mediated diseases are reviewed.
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Affiliation(s)
- Zhenyang Guo
- Department of Cardiology, Zhongshan Hospital, Shanghai Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.
| | - Peng Li
- Department of Cardiology, Zhongshan Hospital, Shanghai Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.
| | - Junbo Ge
- Department of Cardiology, Zhongshan Hospital, Shanghai Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.
- Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Hua Li
- Department of Cardiology, Zhongshan Hospital, Shanghai Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.
- Institutes of Biomedical Sciences, Fudan University, Shanghai, China
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Guo WH, Guo Q, Liu YL, Yan DD, Jin L, Zhang R, Yan J, Luo XH, Yang M. Mutated lncRNA increase the risk of type 2 diabetes by promoting β cell dysfunction and insulin resistance. Cell Death Dis 2022; 13:904. [PMID: 36302749 PMCID: PMC9613878 DOI: 10.1038/s41419-022-05348-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 10/11/2022] [Accepted: 10/13/2022] [Indexed: 11/06/2022]
Abstract
Islet β cell dysfunction and insulin resistance are the main pathogenesis of type 2 diabetes (T2D), but the mechanism remains unclear. Here we identify a rs3819316 C > T mutation in lncRNA Reg1cp mainly expressed in islets associated with an increased risk of T2D. Analyses in 16,113 Chinese adults reveal that Mut-Reg1cp individuals had higher incidence of T2D and presented impaired insulin secretion as well as increased insulin resistance. Mice with islet β cell specific Mut-Reg1cp knock-in have more severe β cell dysfunction and insulin resistance. Mass spectrometry assay of proteins after RNA pulldown demonstrate that Mut-Reg1cp directly binds to polypyrimidine tract binding protein 1 (PTBP1), further immunofluorescence staining, western blot analysis, qPCR analysis and glucose stimulated insulin secretion test reveal that Mut-Reg1cp disrupts the stabilization of insulin mRNA by inhibiting the phosphorylation of PTBP1 in β cells. Furthermore, islet derived exosomes transfer Mut-Reg1cp into peripheral tissue, which then promote insulin resistance by inhibiting AdipoR1 translation and adiponectin signaling. Our findings identify a novel mutation in lncRNA involved in the pathogenesis of T2D, and reveal a new mechanism for the development of T2D.
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Affiliation(s)
- Wan-Hui Guo
- grid.452223.00000 0004 1757 7615Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, 410008 Changsha, Hunan P.R. China
| | - Qi Guo
- grid.452223.00000 0004 1757 7615Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, 410008 Changsha, Hunan P.R. China ,grid.452223.00000 0004 1757 7615National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, 410008 Changsha, Hunan P.R. China
| | - Ya-Lin Liu
- grid.452223.00000 0004 1757 7615Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, 410008 Changsha, Hunan P.R. China
| | - Dan-Dan Yan
- grid.16821.3c0000 0004 0368 8293Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Centre for Diabetes, Shanghai Sixth People’s Hospital affiliated to Shanghai Jiao Tong University School of Medicine, 200233 Shanghai, P.R. China
| | - Li Jin
- grid.16821.3c0000 0004 0368 8293Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Centre for Diabetes, Shanghai Sixth People’s Hospital affiliated to Shanghai Jiao Tong University School of Medicine, 200233 Shanghai, P.R. China
| | - Rong Zhang
- grid.16821.3c0000 0004 0368 8293Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Centre for Diabetes, Shanghai Sixth People’s Hospital affiliated to Shanghai Jiao Tong University School of Medicine, 200233 Shanghai, P.R. China
| | - Jing Yan
- grid.16821.3c0000 0004 0368 8293Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Centre for Diabetes, Shanghai Sixth People’s Hospital affiliated to Shanghai Jiao Tong University School of Medicine, 200233 Shanghai, P.R. China
| | - Xiang-Hang Luo
- grid.452223.00000 0004 1757 7615Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, 410008 Changsha, Hunan P.R. China ,grid.452223.00000 0004 1757 7615National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, 410008 Changsha, Hunan P.R. China
| | - Mi Yang
- grid.452223.00000 0004 1757 7615Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, 410008 Changsha, Hunan P.R. China ,grid.452223.00000 0004 1757 7615National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, 410008 Changsha, Hunan P.R. China
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10
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Bhargave A, Devi K, Ahmad I, Yadav A, Gupta R. Genetic variation in DPP-IV gene linked to predisposition of T2DM: A case control study. J Diabetes Metab Disord 2022; 21:1709-1716. [PMID: 36249912 PMCID: PMC9554862 DOI: 10.1007/s40200-022-01131-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 09/15/2022] [Indexed: 11/25/2022]
Abstract
Purpose DPP-IV is a ubiquitously expressed cell surface protein that can be presented in soluble forms. It has recently gained medical importance as its inhibitors are widely being used as treatment of T2DM. The present research aims to resolve whether genetic variants of DPP-IV have association with susceptibility to T2DM. Method Two variants of DPP-IV were detected in 100 controls and 100 T2DM by PCR–RFLP technique. Demographic characteristics were recorded. Clinical characteristics were analyzed by enzymatic method. Statistical analysis was performed using SPSS-21. Results Demographic and clinical characteristics differ significantly between two groups. The genetic variation in SNP rs3788979 and SNP rs7608798, both in case and control, were in accordance with Hardy–Weinberg Equilibrium (p value > 0.05). Both SNPs rs3788979 and rs7608798 were significantly related to T2DM (p- < 0.05). Minor G allele of rs3788979 was linked with the susceptibility of T2DM (p-value-0.000; OR- 4.235). T allele of SNP rs7608798 conferred the risk of diabetes with OR-2.235. Conclusion This is the first attempt to investigate the association of DPP-IV gene with T2DM in Indian population. The finding of study concludes that genetic variation in DPP-IV gene may considerably increase the risk of developing T2DM.
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Affiliation(s)
- Archna Bhargave
- Department of Biochemistry, Kurukshetra University, Kurukshetra, 136119 Haryana India
| | - Kiran Devi
- Department of Biochemistry, Kurukshetra University, Kurukshetra, 136119 Haryana India
| | - Imteyaz Ahmad
- Department of Biochemistry, Kurukshetra University, Kurukshetra, 136119 Haryana India
| | - Anita Yadav
- Department of Biotechnology, Kurukshetra Univerity, Kurukshetra, India
| | - Ranjan Gupta
- Department of Biochemistry, Kurukshetra University, Kurukshetra, 136119 Haryana India
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11
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Downie CG, Dimos SF, Bien SA, Hu Y, Darst BF, Polfus LM, Wang Y, Wojcik GL, Tao R, Raffield LM, Armstrong ND, Polikowsky HG, Below JE, Correa A, Irvin MR, Rasmussen-Torvik LJF, Carlson CS, Phillips LS, Liu S, Pankow JS, Rich SS, Rotter JI, Buyske S, Matise TC, North KE, Avery CL, Haiman CA, Loos RJF, Kooperberg C, Graff M, Highland HM. Multi-ethnic GWAS and fine-mapping of glycaemic traits identify novel loci in the PAGE Study. Diabetologia 2022; 65:477-489. [PMID: 34951656 PMCID: PMC8810722 DOI: 10.1007/s00125-021-05635-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 10/21/2021] [Indexed: 01/02/2023]
Abstract
AIMS/HYPOTHESIS Type 2 diabetes is a growing global public health challenge. Investigating quantitative traits, including fasting glucose, fasting insulin and HbA1c, that serve as early markers of type 2 diabetes progression may lead to a deeper understanding of the genetic aetiology of type 2 diabetes development. Previous genome-wide association studies (GWAS) have identified over 500 loci associated with type 2 diabetes, glycaemic traits and insulin-related traits. However, most of these findings were based only on populations of European ancestry. To address this research gap, we examined the genetic basis of fasting glucose, fasting insulin and HbA1c in participants of the diverse Population Architecture using Genomics and Epidemiology (PAGE) Study. METHODS We conducted a GWAS of fasting glucose (n = 52,267), fasting insulin (n = 48,395) and HbA1c (n = 23,357) in participants without diabetes from the diverse PAGE Study (23% self-reported African American, 46% Hispanic/Latino, 40% European, 4% Asian, 3% Native Hawaiian, 0.8% Native American), performing transethnic and population-specific GWAS meta-analyses, followed by fine-mapping to identify and characterise novel loci and independent secondary signals in known loci. RESULTS Four novel associations were identified (p < 5 × 10-9), including three loci associated with fasting insulin, and a novel, low-frequency African American-specific locus associated with fasting glucose. Additionally, seven secondary signals were identified, including novel independent secondary signals for fasting glucose at the known GCK locus and for fasting insulin at the known PPP1R3B locus in transethnic meta-analysis. CONCLUSIONS/INTERPRETATION Our findings provide new insights into the genetic architecture of glycaemic traits and highlight the continued importance of conducting genetic studies in diverse populations. DATA AVAILABILITY Full summary statistics from each of the population-specific and transethnic results are available at NHGRI-EBI GWAS catalog ( https://www.ebi.ac.uk/gwas/downloads/summary-statistics ).
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Affiliation(s)
- Carolina G Downie
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
| | - Sofia F Dimos
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Stephanie A Bien
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Yao Hu
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Burcu F Darst
- Department of Preventive Medicine, Center for Genetic Epidemiology, University of Southern California, Los Angeles, CA, USA
| | - Linda M Polfus
- Department of Preventive Medicine, Center for Genetic Epidemiology, University of Southern California, Los Angeles, CA, USA
- Ambry Genetics, Aliso Viejo, CA, USA
| | - Yujie Wang
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Genevieve L Wojcik
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Ran Tao
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, USA
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Laura M Raffield
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Nicole D Armstrong
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Hannah G Polikowsky
- Department of Medicine, Division of Genetic Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Jennifer E Below
- Department of Medicine, Division of Genetic Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Adolfo Correa
- Department of Medicine, Jackson Heart Study, University of Mississippi Medical Center, Jackson, MS, USA
| | - Marguerite R Irvin
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Laura J F Rasmussen-Torvik
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Christopher S Carlson
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Lawrence S Phillips
- Atlanta VA Medical Center, Decatur, GA, USA
- Department of Medicine, Division of Endocrinology, Emory University School of Medicine, Atlanta, GA, USA
| | - Simin Liu
- Department of Medicine, Division of Endocrinology, Warren Alpert School of Medicine, Brown University, Providence, RI, USA
- Department of Epidemiology, Brown School of Public Health, Providence, RI, USA
| | - James S Pankow
- Division of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, MN, USA
| | - Stephen S Rich
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA, USA
| | - Jerome I Rotter
- Department of Pediatrics, Genome Outcomes, The Institute for Translational Genomics and Population Sciences, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Steven Buyske
- Department of Statistics, Rutgers University, Piscataway, NJ, USA
| | - Tara C Matise
- Department of Genetics, Rutgers University, Piscataway, NJ, USA
| | - Kari E North
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Christy L Avery
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Christopher A Haiman
- Department of Preventive Medicine, Center for Genetic Epidemiology, University of Southern California, Los Angeles, CA, USA
| | - Ruth J F Loos
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Charles Kooperberg
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Mariaelisa Graff
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Heather M Highland
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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12
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Zhang X, Wang H, Xie C, Hu Z, Zhang Y, Peng S, He Y, Kang J, Gao H, Yuan H, Liu Y, Fan G. Shenqi compound ameliorates type-2 diabetes mellitus by modulating the gut microbiota and metabolites. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1194:123189. [PMID: 35219959 DOI: 10.1016/j.jchromb.2022.123189] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 01/25/2022] [Accepted: 02/22/2022] [Indexed: 11/26/2022]
Abstract
The gut microbiota (GM) and metabolites are important factors in mediating the development of type-2 diabetes mellitus (T2DM). An imbalance in the gut microbiota and metabolites can disrupt the function of the intestinal barrier, cause changes in the permeability of the intestinal mucosa and promote the immune inflammatory response, thereby aggravating the fluctuation of blood glucose level and promoting the occurrence and development of the chronic complications of DM. Manipulating the GM and metabolites is a promising therapeutic intervention and is being studied extensively. Shenqi compound (SQC) is a traditional Chinese medicine formulation, which has been widely used to improve T2DM. Studies have demonstrated that SQC can reduce glycemic variability, alleviate the inflammatory response, etc. However, its underlying mechanism remains unknown. Therefore, in this experiment, We administered SQC to Goto-Kakizaki (GK) rats and evaluated its effect on blood glucose homeostasis and the intestinal mucosal barrier. We identified the profiles of the GM and metabolites with the aid of 16S rDNA gene sequencing and non-target metabolomics analysis. It showed that SQC intervention could reduce glycemic variability, regulate serum levels of glucagon and insulin, and improve injury to the intestinal mucosal barrier of GK rats. In the gut, the ratio of bacteria of the phyla Bacteroidetes/Firmicutes could be improved after SQC intervention. SQC also regulated the relative abundance of Prevotellaceae, Butyricimonas, Bacteroides, Blautia, Roseburia, Lactobacillus, and Rothia. We found out that expression of 40 metabolites was significantly improved after SQC intervention. Further analyses of metabolic pathways indicated that the therapeutic effect of SQC might be related predominantly to its ability to improve gluconeogenesis/glycolysis, amino acid metabolism, lipid metabolism, citrate cycle, and butanoate metabolism. These results suggest that SQC may exert a beneficial role in T2DM by modulating the GM and metabolites in different pathways.
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Affiliation(s)
- Xiyu Zhang
- TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Heting Wang
- Department of Traditional Chinese Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Chunguang Xie
- TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Zhipeng Hu
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yuan Zhang
- First Affiliated Hospital of Army Medical University, Chongqing, China
| | - Sihan Peng
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yuchi He
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jian Kang
- Department of Anorectal, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Hong Gao
- TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Haipo Yuan
- TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Ya Liu
- TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China.
| | - Gang Fan
- School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China.
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13
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Qi X, Sun Z, Li X, Jiao Y, Chen S, Song P, Qian Z, Qian J, Qiu X, Tang L. Shp2 suppresses fat accumulation in white adipose tissue by activating Wnt/β‑catenin signaling following vertical sleeve gastrectomy in obese rats with type‑2 diabetes. Exp Ther Med 2022; 23:302. [PMID: 35340882 PMCID: PMC8931631 DOI: 10.3892/etm.2022.11231] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/11/2022] [Indexed: 12/02/2022] Open
Abstract
Adipogenesis and fat accumulation are closely associated with the development of obesity. Sleeve gastrectomy (SG) is an effective treatment for obesity and associated metabolic disorders. Leptin is downregulated after SG and Src homology phosphatase 2 (Shp2) has an important role in leptin signaling. The role of Shp2 in SG and the mechanisms of fat reduction following SG were further investigated in the current study. Sham and SG operations were performed on obese type-2 diabetes model Sprague-Dawley rats. Primary pre-adipocytes were isolated from the inguinal white adipose tissue (ingWAT) of the rats. Shp2 expression in ingWAT pre-adipocytes was silenced using small interfering RNA transfection. Shp2 function was inhibited using the specific inhibitor, SHP099. In addition, Shp2 was overexpressed using lentivirus. Gene and protein expression analysis was performed after adipocyte differentiation. Furthermore, Shp2-overexpressing ingWAT pre-adipocytes treated with the β-catenin inhibitor, PNU-74654, were also used for gene and protein expression analysis. Adipogenic markers, including triglycerides, peroxisome proliferator-activated receptor γ (PPARγ), CCAAT/enhancer-binding protein α (Cebpα), adiponectin, fatty acid-binding protein 4 and leptin, were examined. Compared with the sham, triglyceride, leptin, PPARγ and Cebpα levels were significantly reduced in the ingWAT from the SG group. Shp2 expression levels were reduced following leptin treatment. Moreover, genetic analysis demonstrated depot-specific adipogenesis following Shp2 silencing or inhibition in ingWAT pre-adipocytes. Conversely, Shp2 overexpression decreased the expression of adipogenic markers by enhancing β-catenin expression. PNU-74654 treatment abolished the downregulation of adipogenic markers caused by Shp2 overexpression. SG decreased leptin levels in ingWAT, which in turn upregulated Shp2, and Shp2 suppressed fat accumulation and adipogenic differentiation by activating the Wnt/β-catenin signaling pathway. Overall, this may represent a potential mechanism of fat reduction in SG, and Shp2 may serve as a potential therapeutic target for the treatment of obesity and type-2 diabetes.
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Affiliation(s)
- Xiaoyang Qi
- Department of Gastrointestinal Surgery, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu 213000, P.R. China
| | - Ziying Sun
- Department of Orthopedics, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China
| | - Xugang Li
- Department of Orthopedics, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China
| | - Yuwen Jiao
- Department of Gastrointestinal Surgery, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu 213000, P.R. China
| | - Shuai Chen
- Department of Gastrointestinal Surgery, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu 213000, P.R. China
| | - Peng Song
- Department of Gastrointestinal Surgery, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu 213000, P.R. China
| | - Zhifen Qian
- Department of Gastrointestinal Surgery, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu 213000, P.R. China
| | - Jun Qian
- Department of Gastrointestinal Surgery, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu 213000, P.R. China
| | - Xusheng Qiu
- Department of Orthopedics, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China
| | - Liming Tang
- Department of Gastrointestinal Surgery, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu 213000, P.R. China
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14
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McClean C, Davison GW. Circadian Clocks, Redox Homeostasis, and Exercise: Time to Connect the Dots? Antioxidants (Basel) 2022; 11:antiox11020256. [PMID: 35204138 PMCID: PMC8868136 DOI: 10.3390/antiox11020256] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/11/2022] [Accepted: 01/18/2022] [Indexed: 12/14/2022] Open
Abstract
Compelling research has documented how the circadian system is essential for the maintenance of several key biological processes including homeostasis, cardiovascular control, and glucose metabolism. Circadian clock disruptions, or losses of rhythmicity, have been implicated in the development of several diseases, premature ageing, and are regarded as health risks. Redox reactions involving reactive oxygen and nitrogen species (RONS) regulate several physiological functions such as cell signalling and the immune response. However, oxidative stress is associated with the pathological effects of RONS, resulting in a loss of cell signalling and damaging modifications to important molecules such as DNA. Direct connections have been established between circadian rhythms and oxidative stress on the basis that disruptions to circadian rhythms can affect redox biology, and vice versa, in a bi-directional relationship. For instance, the expression and activity of several key antioxidant enzymes (SOD, GPx, and CAT) appear to follow circadian patterns. Consequently, the ability to unravel these interactions has opened an exciting area of redox biology. Exercise exerts numerous benefits to health and, as a potent environmental cue, has the capacity to adjust disrupted circadian systems. In fact, the response to a given exercise stimulus may also exhibit circadian variation. At the same time, the relationship between exercise, RONS, and oxidative stress has also been scrutinised, whereby it is clear that exercise-induced RONS can elicit both helpful and potentially harmful health effects that are dependent on the type, intensity, and duration of exercise. To date, it appears that the emerging interface between circadian rhythmicity and oxidative stress/redox metabolism has not been explored in relation to exercise. This review aims to summarise the evidence supporting the conceptual link between the circadian clock, oxidative stress/redox homeostasis, and exercise stimuli. We believe carefully designed investigations of this nexus are required, which could be harnessed to tackle theories concerned with, for example, the existence of an optimal time to exercise to accrue physiological benefits.
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15
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Salama A, Asaad GF, Shaheen A. Chrysin ameliorates STZ-induced diabetes in rats: possible impact of modulation of TLR4/NF-κβ pathway. Res Pharm Sci 2021; 17:1-11. [PMID: 34909039 PMCID: PMC8621845 DOI: 10.4103/1735-5362.329921] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/19/2021] [Accepted: 11/01/2021] [Indexed: 12/14/2022] Open
Abstract
Background and purpose: Growing evidence advocates that upregulation of toll-like receptor 4 (TLR4) has been suggested as a causative influence in the development and complications of diabetes mellitus. We aimed to study the antidiabetic activity of chrysin against streptozotocin (STZ)-induced diabetes via down-regulation of TLR4/nuclear factor (NF-κβ)/heat shock protein 70 (HSP70) pathway as well as modulation of clusters of differentiation 4 (CD4+) in rats. Experimental approach: Fifty rats were divided into five groups (n = 10). Group I, normal rats received a single intraperitoneal injection of buffer citrate; group II, STZ-induced diabetic rats; groups III-V, diabetic rats received glimepiride (0.5 mg/kg; p.o.) or chrysin (40 and 80 mg/kg; p.o.) respectively, for 10 days. Serum samples were extracted to determine nitric oxide (NO), malondialdehyde (MDA), and reduced glutathione (GSH), insulin, CD4+, TLR4, and NF-κβ. Pancreatic tissue samples were extracted to determine glucose transporter 2 (GLUT2). Part of the pancreas was kept in formalin for pathological studies. Findings/Results: An elevation in blood glucose, NO, and MDA serum levels and a reduction of pancreatic GLUT2 content, insulin, and GSH serum levels were observed in diabetic rats. STZ injection, also, showed an increase in serum TLR4, NF-κβ, and HSP70 levels and a reduction in serum CD4+ levels with pancreatic cells necrosis. These biochemical and histological changes were reversed in glimepiride and chrysin groups. Conclusion and implications: The present study proved that chrysin has a potent anti-diabetic effect through the elevation of insulin and GLUT2 levels, the reduction of oxidative stress, and the inflammatory pathways TLR4/NF-κβ/HSP70 with the regulation of CD4+.
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Affiliation(s)
- Abeer Salama
- Department of Pharmacology, National Research Centre, 33 El Buhouth St., Dokki, Cairo, 12622, Egypt
| | - Gihan F Asaad
- Department of Pharmacology, National Research Centre, 33 El Buhouth St., Dokki, Cairo, 12622, Egypt
| | - Aya Shaheen
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Egyptian Russian University, Egypt
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16
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Indoxyl Sulfate Elevated Lnc-SLC15A1-1 Upregulating CXCL10/CXCL8 Expression in High-Glucose Endothelial Cells by Sponging MicroRNAs. Toxins (Basel) 2021; 13:toxins13120873. [PMID: 34941711 PMCID: PMC8709190 DOI: 10.3390/toxins13120873] [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: 10/15/2021] [Revised: 11/28/2021] [Accepted: 12/04/2021] [Indexed: 11/28/2022] Open
Abstract
Cardiovascular disease (CVD) is the leading cause of mortality in diabetes mellitus (DM). Immunomodulatory dysfunction is a primary feature of DM, and the emergence of chronic kidney disease (CKD) in DM abruptly increases CVD mortality compared with DM alone. Endothelial injury and the accumulation of uremic toxins in the blood of DM/CKD patients are known mechanisms for the pathogenesis of CVD. However, the molecular factors that cause this disproportional increase in CVD in the DM/CKD population are still unknown. Since long non-protein-coding RNAs (lncRNAs) play an important role in regulating multiple cellular functions, we used human endothelial cells treated with high glucose to mimic DM and with the uremic toxin indoxyl sulfate (IS) to mimic the endothelial injury associated with CKD. Differentially expressed lncRNAs in these conditions were analyzed by RNA sequencing. We discovered that lnc-SLC15A1-1 expression was significantly increased upon IS treatment in comparison with high glucose alone, and then cascaded the signal of chemokines CXCL10 and CXCL8 via sponging miR-27b, miR-297, and miR-150b. This novel pathway might be responsible for the endothelial inflammation implicated in augmenting CVD in DM/CKD and could be a therapeutic target with future clinical applications.
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17
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Johnson JD. On the causal relationships between hyperinsulinaemia, insulin resistance, obesity and dysglycaemia in type 2 diabetes. Diabetologia 2021; 64:2138-2146. [PMID: 34296322 DOI: 10.1007/s00125-021-05505-4] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 04/23/2021] [Indexed: 12/19/2022]
Abstract
Hundreds of millions of people are affected by hyperinsulinaemia, insulin resistance, obesity and the dysglycaemia that mark a common progression from metabolic health to type 2 diabetes. Although the relative contribution of these features and the order in which they appear may differ between individuals, the common clustering and seemingly progressive nature of type 2 diabetes aetiology has guided research and clinical practice in this area for decades. At the same time, lively debate around the causal relationships between these features has continued, as new data from human trials and highly controlled animal studies are presented. This 'For debate' article was prompted by the review in Diabetologia by Esser, Utzschneider and Kahn ( https://doi.org/10.1007/s00125-020-05245-x ), with the purpose of reviewing established and emerging data that provide insight into the relative contributions of hyperinsulinaemia and impaired glucose-stimulated insulin secretion in progressive stages between health, obesity and diabetes. It is concluded that these beta cell defects are not mutually exclusive and that they are both important, but at different stages.
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Affiliation(s)
- James D Johnson
- Diabetes Research Group, Life Sciences Institute, Department of Cellular and Physiological Sciences, Faculty of Medicine, The University of British Columbia, Vancouver, BC, Canada.
- Institute for Personalized Therapeutic Nutrition, Vancouver, BC, Canada.
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18
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So WY, Liu WN, Teo AKK, Rutter GA, Han W. Paired box 6 programs essential exocytotic genes in the regulation of glucose-stimulated insulin secretion and glucose homeostasis. Sci Transl Med 2021; 13:13/600/eabb1038. [PMID: 34193609 DOI: 10.1126/scitranslmed.abb1038] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 01/25/2021] [Accepted: 05/26/2021] [Indexed: 01/26/2023]
Abstract
The paired box 6 (PAX6) transcription factor is crucial for normal pancreatic islet development and function. Heterozygous mutations of PAX6 are associated with impaired insulin secretion and early-onset diabetes mellitus in humans. However, the molecular mechanism of PAX6 in controlling insulin secretion in human beta cells and its pathophysiological role in type 2 diabetes (T2D) remain ambiguous. We investigated the molecular pathway of PAX6 in the regulation of insulin secretion and the potential therapeutic value of PAX6 in T2D by using human pancreatic beta cell line EndoC-βH1, the db/db mouse model, and primary human pancreatic islets. Through loss- and gain-of-function approaches, we uncovered a mechanism by which PAX6 modulates glucose-stimulated insulin secretion (GSIS) through a cAMP response element-binding protein (CREB)/Munc18-1/2 pathway. Moreover, under diabetic conditions, beta cells and pancreatic islets displayed dampened PAX6/CREB/Munc18-1/2 pathway activity and impaired GSIS, which were reversed by PAX6 replenishment. Adeno-associated virus-mediated PAX6 overexpression in db/db mouse pancreatic beta cells led to a sustained amelioration of glycemic perturbation in vivo but did not affect insulin resistance. Our study highlights the pathophysiological role of PAX6 in T2D-associated beta cell dysfunction in humans and suggests the potential of PAX6 gene transfer in preserving and restoring beta cell function.
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Affiliation(s)
- Wing Yan So
- Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Singapore 138673, Singapore
| | - Wai Nam Liu
- Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Singapore 138673, Singapore
| | - Adrian Kee Keong Teo
- Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Singapore 138673, Singapore.,Departments of Biochemistry and Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117596, Singapore
| | - Guy A Rutter
- Section of Cell Biology and Functional Genomics and Division of Diabetes, Endocrinology and Metabolism, Imperial College London, London W12 0NN, UK
| | - Weiping Han
- Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Singapore 138673, Singapore. .,Center for Neuro-Metabolism and Regeneration Research, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Guangzhou 510700, China
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19
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Zhang B, Yang Y, Yi J, Zhao Z, Ye R. Hyperglycemia modulates M1/M2 macrophage polarization via reactive oxygen species overproduction in ligature-induced periodontitis. J Periodontal Res 2021; 56:991-1005. [PMID: 34190354 DOI: 10.1111/jre.12912] [Citation(s) in RCA: 108] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 05/27/2021] [Accepted: 06/01/2021] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND OBJECTIVE Periodontitis in diabetic patients is characterized by enhanced inflammation and aggravated tissue damage in comparison with that in non-diabetic counterparts. The progression of periodontal damage under diabetic condition can be partly ascribed to hyperglycemia-induced disturbance between immune activation and inflammation resolution, where macrophages are capable of participating given their plasticity in response to different stimuli. Herein, we aimed to investigate the changes of macrophage polarization in periodontitis under diabetic condition and the underlying mechanism. MATERIALS AND METHODS Type-1 diabetes was induced by the injection of streptozotocin (STZ, 60 mg/kg) in Sprague-Dawley rats. Rats in N-acetyl cysteine (NAC)-treated groups received NAC dissolved in drinking water (200 mg/kg/day). Experimental periodontitis was induced by ligating 3-0 silk around left maxillary second molars for 4 weeks. Alveolar bone destruction was tested by micro-computed tomography and tartrate-resistant acid phosphatase (TRAP) staining. M1/M2 macrophage polarization in periodontal tissue was detected by immunohistochemistry staining. RAW264.7 were cultured in normal glucose (5.5 mM) or high glucose environment (25 mM) with or without NAC (8 mmol/L). LPS (100 ng/ml) and IL-4 (20 ng/ml) were used to induce M1 macrophages and M2 macrophages, respectively. M1/M2 macrophage polarization was detected by qRT-PCR, immunofluorescent staining, and flow cytometry. Reactive oxygen species (ROS) accumulation was detected by fluorogenic probes. RANKL (100 ng/ml) were applied to induce osteoclastogenic differentiation of RAW264.7, and osteoclast formation was examined by TRAP staining. RESULTS Rats with diabetes displayed enhanced macrophages infiltration and M1 macrophage polarization in periodontal lesions compared with vehicle-treated rats. Under LPS or IL-4 stimulation, high glucose culture of RAW264.7 elevated ROS level and increased the expression of M1 macrophage markers (iNOS, TNF-α, and IL-6) whereas decreased the expression of M2 macrophage markers (Arg-1 and CD206). Supernatants of high glucose-treated M1/M2 macrophages enhanced osteoclast formation compared to normal glucose-cultured cells. Decreasing ROS level via NAC partially reversed the effect of high glucose on M1/M2 macrophage polarization. Meanwhile, daily intake of NAC in rodent models inhibited M1 macrophage polarization, which subsequently ameliorated alveolar bone loss and decreased osteoclast numbers in periodontitis in diabetic rats. CONCLUSION These findings demonstrated that hyperglycemia could polarize macrophage toward M1 macrophages via overproducing ROS under inflammatory condition, which might take responsibility for aggravated periodontal damage in periodontitis under diabetic condition. Inhibiting M1 macrophages and restoring M2 macrophages by ROS scavenger is hopefully a potential adjunct treatment strategy for diabetic periodontitis.
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Affiliation(s)
- Bo Zhang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yang Yang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of General Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jianru Yi
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Zhihe Zhao
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Rui Ye
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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20
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Xu T, Ge Y, Du H, Li Q, Xu X, Yi H, Wu X, Kuang T, Fan G, Zhang Y. Berberis kansuensis extract alleviates type 2 diabetes in rats by regulating gut microbiota composition. JOURNAL OF ETHNOPHARMACOLOGY 2021; 273:113995. [PMID: 33675912 DOI: 10.1016/j.jep.2021.113995] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 02/23/2021] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND The stem bark of Berberis kansuensis Schneid (BK) is a commonly used Tibetan medicine for the treatment of type 2 diabetes (T2D). However, its therapeutic mechanisms remain unclear. AIM OF THE STUDY Our aim is to clarify the role of gut microbiota in the anti-diabetic activity of BK extract. MATERIALS AND METHODS High fat diet combined with low-dose streptozotocin (45 mg/kg) was used to establish a T2D rat model, and the body weight of rats was measured every five days. Fasting blood glucose (FBG), glycosylated serum protein (GSP), insulin resistance index (HOMA-IR), insulin sensitivity index (ISI), lipopolysaccharide (LPS), and three inflammatory factors (TNF-α, IL-1 β and IL-6) were measured to evaluate the anti-diabetic activity of BK. Moreover, pseudo-germ-free animals were prepared by oral administration of an antibiotic mixture (100 mg/kg neomycin, 100 mg/kg ampicillin and 50 mg/kg metronidazole) twice per day for 6 days to assess the role of gut microbiota. Gut microbiota analysis was performed through 16S rRNA high-throughput sequencing method. RESULTS After 30 days of administration, BK extract could significantly decrease the levels of body weight, FBG, GSP, HOMA-IR, LPS, TNF-α, IL-1β and IL-6, and increase ISI levels in T2D rats. However, when the gut microbiota of T2D rats was disturbed by antibiotics, BK could not improve HOMA-IR and ISI levels in T2D rats. The results indicated that the anti-diabetic effect of BK might depend on the gut microbiota. Moreover, sequencing of 16S rRNA genes demonstrated that BK could significantly improve the gut microbiota disorder of T2D rats. Specifically, BK increased the abundance of phyla Bacteroidetes and genera Akkermansia and the ratio of Bacteroides/Firmicutes, while reducing the abundance of phyla Proteobacteria and genera Collinella, [Ruminococcus]_gauvreauii_Group, Escherichia Shigella, Enterococcus, Fusobacterium, Holdemanella, and Prevotella_9 in T2D rats. Additionally, correlation analysis revealed that Akkermansia was positively correlated with ISI, while [Ruminococcus]_gauvreauii_Group, Collinella, Escherichia Shigella, Enterococcus, Fusobacterium, Holdemanella and Prevotella_9 were positively correlated with FBG, GSP, LPS, HOMA-IR, TNF-α, IL-1β, and IL-6. CONCLUSION BK extract has a good anti-diabetic effect on T2D rats. The mechanism by which this extract exerts its action is, at least partly, related to its regulation of gut microbiota.
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Affiliation(s)
- Tong Xu
- School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Yiman Ge
- Department of Inspection, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, China
| | - Huan Du
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Qi Li
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Xinmei Xu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Huan Yi
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Xinyue Wu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Tingting Kuang
- School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Gang Fan
- School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
| | - Yi Zhang
- School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
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21
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Arthur G, Oliver W, Klaus B, Thomas S, Gökhan I, Sharon B, Isabelle T, Pierre D, Thierry L. Hierarchical Graph Representation of Pharmacophore Models. Front Mol Biosci 2021; 7:599059. [PMID: 33425991 PMCID: PMC7793842 DOI: 10.3389/fmolb.2020.599059] [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: 08/26/2020] [Accepted: 11/24/2020] [Indexed: 11/17/2022] Open
Abstract
For the investigation of protein-ligand interaction patterns, the current accessibility of a wide variety of sampling methods allows quick access to large-scale data. The main example is the intensive use of molecular dynamics simulations applied to crystallographic structures which provide dynamic information on the binding interactions in protein-ligand complexes. Chemical feature interaction based pharmacophore models extracted from these simulations, were recently used with consensus scoring approaches to identify potentially active molecules. While this approach is rapid and can be fully automated for virtual screening, additional relevant information from such simulations is still opaque and so far the full potential has not been entirely exploited. To address these aspects, we developed the hierarchical graph representation of pharmacophore models (HGPM). This single graph representation enables an intuitive observation of numerous pharmacophore models from long MD trajectories and further emphasizes their relationship and feature hierarchy. The resulting interactive depiction provides an easy-to-apprehend tool for the selection of sets of pharmacophores as well as visual support for analysis of pharmacophore feature composition and virtual screening results. Furthermore, the representation can be adapted to include information involving interactions between the same protein and multiple different ligands. Herein, we describe the generation, visualization and use of HGPMs generated from MD simulations of two x-ray crystallographic derived structures of the human glucokinase protein in complex with allosteric activators. The results demonstrate that a large number of pharmacophores and their relationships can be visualized in an interactive, efficient manner, unique binding modes identified and a combination of models derived from long MD simulations can be strategically prioritized for VS campaigns.
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Affiliation(s)
- Garon Arthur
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Wieder Oliver
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Bareis Klaus
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Seidel Thomas
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Ibis Gökhan
- Inte:Ligand Software-Entwicklungs und Consulting GmbH, Vienna, Austria
| | - Bryant Sharon
- Inte:Ligand Software-Entwicklungs und Consulting GmbH, Vienna, Austria
| | - Theret Isabelle
- Institut de Recherches Servier (IdRS), Croissy-sur-Seine, France
| | - Ducrot Pierre
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria.,Institut de Recherches Servier (IdRS), Croissy-sur-Seine, France
| | - Langer Thierry
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
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22
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Al Agha AE, Alharbi RS, Almohammadi OA, Yousef SY, Sulimani AE, Alaama RA. Impact of COVID-19 lockdown on glycemic control in children and adolescents. Saudi Med J 2021; 42:44-48. [PMID: 33399170 PMCID: PMC7989327 DOI: 10.15537/smj.2021.1.25620] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 12/07/2020] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVES To identify how children and adolescents with type 1 diabetes were coping with their condition during the COVID-19 lockdown, by detecting differences in blood glucose control and in lifestyle, including diet, physical activity, and mood deterioration, before and during the lockdown. METHODS This descriptive, cross-sectional study was conducted between April and June 2020 at King Abdulaziz University Hospital (KAUH), Jeddah, Saudi Arabia. Data were collected from interviews, using various forms of telecommunication. RESULTS The total sample size was 150 patients, 48 (28%) of whom were males and 102 (72%) females. The mean age of the patients was 12.45 years. The lockdown was associated with a significant increase in patients' weight (p=0.001), body mass index (p=0.001), and blood glucose readings (p=0.007) compared to their values before the lockdown. Conclusion: A negative impact of the COVID-19 lockdown was found on blood glucose values and BMI, which may correlate with a lack of physical activity, increased consumption of carbohydrates and fast food, and mood deterioration.
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Affiliation(s)
- Abdulmoein E Al Agha
- Pediatric Department, Faculty of Medicine, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia. E-mail.
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23
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Mitrofanova LB, Perminova AA, Ryzhkova DV, Sukhotskaya AA, Bairov VG, Nikitina IL. Differential Morphological Diagnosis of Various Forms of Congenital Hyperinsulinism in Children. Front Endocrinol (Lausanne) 2021; 12:710947. [PMID: 34497584 PMCID: PMC8419459 DOI: 10.3389/fendo.2021.710947] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 08/04/2021] [Indexed: 12/23/2022] Open
Abstract
INTRODUCTION Congenital hyperinsulinism (CHI) has diffuse (CHI-D), focal (CHI-F) and atypical (CHI-A) forms. Surgical management depends on preoperative [18F]-DOPA PET/CT and intraoperative morphological differential diagnosis of CHI forms. Objective: to improve differential diagnosis of CHI forms by comparative analysis [18F]-DOPA PET/CT data, as well as cytological, histological and immunohistochemical analysis (CHIA). MATERIALS AND METHODS The study included 35 CHI patients aged 3.2 ± 2.0 months; 10 patients who died from congenital heart disease at the age of 3.2 ± 2.9 months (control group). We used PET/CT, CHIA of pancreas with antibodies to ChrA, insulin, Isl1, Nkx2.2, SST, NeuroD1, SSTR2, SSTR5, DR1, DR2, DR5; fluorescence microscopy with NeuroD1/ChrA, Isl1/insulin, insulin/SSTR2, DR2/NeuroD1 cocktails. RESULTS Intraoperative examination of pancreatic smears showed the presence of large nuclei, on average, in: 14.5 ± 3.5 cells of CHI-F; 8.4 ± 1.1 of CHI-D; and 4.5 ± 0.7 of control group (from 10 fields of view, x400). The percentage of Isl1+ and NeuroD1+endocrinocytes significantly differed from that in the control for all forms of CHI. The percentage of NeuroD1+exocrinocytes was also significantly higher than in the control. The proportion of ChrA+ and DR2+endocrinocytes was higher in CHI-D than in CHI-F, while the proportion of insulin+cells was higher in CHI-A. The number of SST+cells was significantly higher in CHI-D and CHI-F than in CHI-A. CONCLUSION For intraoperative differential diagnosis of CHI forms, in addition to frozen sections, quantitative cytological analysis can be used. In quantitative immunohistochemistry, CHI forms differ in the expression of ChrA, insulin, SST and DR2. The development of a NeuroD1 inhibitor would be advisable for targeted therapy of CHI.
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24
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Lin W, Zhang T, Zhou Y, Zheng J, Lin Z. Advances in Biological Functions and Clinical Studies of FGF21. Diabetes Metab Syndr Obes 2021; 14:3281-3290. [PMID: 34295169 PMCID: PMC8291585 DOI: 10.2147/dmso.s317096] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 06/14/2021] [Indexed: 12/28/2022] Open
Abstract
Fibroblast growth factor 21 (FGF21) regulates many crucial biological processes in human and mammals, particularly metabolic modulation and protective effect after injury. Therefore, determining complex regulatory mechanisms and elucidating the signaling pathway may greatly promote the prevention, diagnosis, and treatment of related injury and metabolic diseases. This review focused on the metabolic modulation and protective effect of FGF21 and summarized the molecular mechanisms and clinical research developments.
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Affiliation(s)
- Wei Lin
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, People’s Republic of China
| | - Tianlei Zhang
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, People’s Republic of China
| | - Yiyang Zhou
- Wenzhou Medical University, Wenzhou, 325000, Zhejiang, People’s Republic of China
| | - Jinyu Zheng
- Wenzhou Medical University, Wenzhou, 325000, Zhejiang, People’s Republic of China
| | - Zhenlang Lin
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, People’s Republic of China
- Correspondence: Zhenlang Lin Department of Pediatrics, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, People’s Republic of China Email
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25
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Ammar NM, Hassan HA, Mohammed MA, Serag A, Abd El-Alim SH, Elmotasem H, El Raey M, El Gendy AN, Sobeh M, Abdel-Hamid AHZ. Metabolomic profiling to reveal the therapeutic potency of Posidonia oceanica nanoparticles in diabetic rats. RSC Adv 2021; 11:8398-8410. [PMID: 35423335 PMCID: PMC8695213 DOI: 10.1039/d0ra09606g] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 02/09/2021] [Indexed: 11/25/2022] Open
Abstract
Posidonia oceanica is a sea grass belonging to the family Posidoniaceae, which stands out as a substantial reservoir of bioactive compounds. In this study, the secondary metabolites of the P. oceanica rhizome were annotated using UPLC-HRESI-MS/MS, revealing 86 compounds including simple phenolic acids, flavonoids, and their sulphated conjugates. Moreover, the P. oceanica butanol extract exhibited substantial antioxidant and antidiabetic effects in vitro. Thus, a reliable, robust drug delivery system was developed through the encapsulation of P. oceanica extract in gelatin nanoparticles to protect active constituents, control their release and enhance their therapeutic activity. To confirm these achievements, untargeted GC-MS metabolomics analysis together with biochemical evaluation was employed to investigate the in vivo anti-diabetic potential of the P. oceanica nano-extract. The results of this study demonstrated that the P. oceanica gelatin nanoparticle formulation reduced the serum fasting blood glucose level significantly (p < 0.05) in addition to improving the insulin level, together with the elevation of glucose transporter 4 levels. Besides, multivariate/univariate analyses of the GC-MS metabolomic dataset revealed several dysregulated metabolites in diabetic rats, which were restored to normalized levels after treatment with the P. oceanica gelatin nanoparticle formulation. These metabolites mainly originate from the metabolism of amino acids, fatty acids and carbohydrates, indicating that this type of delivery was more effective than the plain extract in regulating these altered metabolic processes. Overall, this study provides novel insight for the potential of P. oceanica butanol extract encapsulated in gelatin nanoparticles as a promising and effective antidiabetic therapy. The potential of P. oceanica butanol extract encapsulated in gelatin nanoparticles as a promising and effective antidiabetic therapy has been investigated via metabolomics.![]()
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Affiliation(s)
- Naglaa M. Ammar
- Therapeutic Chemistry Department
- National Research Centre
- Cairo
- Egypt
| | - Heba A. Hassan
- Therapeutic Chemistry Department
- National Research Centre
- Cairo
- Egypt
| | - Mona A. Mohammed
- Department of Medicinal and Aromatic Plants Research
- National Research Centre
- Cairo
- Egypt
| | - Ahmed Serag
- Pharmaceutical Analytical Chemistry Department
- Faculty of Pharmacy
- Al-Azhar University
- Cairo
- Egypt
| | | | - Heba Elmotasem
- Pharmaceutical Technology Department
- National Research Centre
- Cairo, 12622
- Egypt
| | - Mohamed El Raey
- Department of Phytochemistry and Plant Systematics
- National Research Center
- Cairo 12622
- Egypt
| | - Abdel Nasser El Gendy
- Department of Medicinal and Aromatic Plants Research
- National Research Centre
- Cairo
- Egypt
| | - Mansour Sobeh
- AgroBioSciences
- Mohammed VI Polytechnic University
- Ben-Guerir 43150
- Morocco
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26
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Podraza-Farhanieh A, Natarajan B, Raj D, Kao G, Naredi P. ENPL-1, the Caenorhabditis elegans homolog of GRP94, promotes insulin secretion via regulation of proinsulin processing and maturation. Development 2020; 147:dev190082. [PMID: 33037039 PMCID: PMC10666919 DOI: 10.1242/dev.190082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 09/28/2020] [Indexed: 12/27/2022]
Abstract
Insulin/IGF signaling in Caenorhabditis elegans is crucial for proper development of the dauer larva and growth control. Mutants disturbing insulin processing, secretion and downstream signaling perturb this process and have helped identify genes that affect progression of type 2 diabetes. Insulin maturation is required for its proper secretion by pancreatic β cells. The role of the endoplasmic reticulum (ER) chaperones in insulin processing and secretion needs further study. We show that the C. elegans ER chaperone ENPL-1/GRP94 (HSP90B1), acts in dauer development by promoting insulin secretion and signaling. Processing of a proinsulin likely involves binding between the two proteins via a specific domain. We show that, in enpl-1 mutants, an unprocessed insulin exits the ER lumen and is found in dense core vesicles, but is not secreted. The high ER stress in enpl-1 mutants does not cause the secretion defect. Importantly, increased ENPL-1 levels result in increased secretion. Taken together, our work indicates that ENPL-1 operates at the level of insulin availability and is an essential modulator of insulin processing and secretion.
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Affiliation(s)
- Agnieszka Podraza-Farhanieh
- Department of Surgery, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, SE413 45 Gothenburg, Sweden
| | | | - Dorota Raj
- Department of Surgery, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, SE413 45 Gothenburg, Sweden
| | - Gautam Kao
- Department of Surgery, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, SE413 45 Gothenburg, Sweden
| | - Peter Naredi
- Department of Surgery, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, SE413 45 Gothenburg, Sweden
- Department of Surgery, Sahlgrenska University Hospital, SE413 45 Gothenburg, Sweden
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27
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Khorsand B, Acri TM, Do A, Femino JE, Petersen E, Fredericks DC, Salem AK. A Multi-Functional Implant Induces Bone Formation in a Diabetic Model. Adv Healthc Mater 2020; 9:e2000770. [PMID: 32815306 DOI: 10.1002/adhm.202000770] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 07/15/2020] [Indexed: 12/21/2022]
Abstract
Patients with diabetes mellitus (DM) have defective healing of bone fractures. It was previously shown that nonviral gene delivery of plasmid DNA (pDNA) that independently encodes bone morphogenetic protein-2 (BMP-2) and fibroblast growth factor-2 (FGF-2), acts synergistically to promote bone regeneration in a DM animal model. Additionally, both insulin (INS) and the hormonally active form of vitamin D3, 1α,25-dihydroxyvitamin D3 (1α,25(OH)2 D3 ) (VD3) have independently been shown to play key roles in regulating bone fracture healing in DM patients. However, these individual therapies fail to adequately stimulate bone regeneration, illustrating a need for novel treatment of bone fractures in diabetic patients. Here, the ability of local delivery of INS and VD3 along with BMP-2 and FGF-2 genes is investigated to promote bone formation ectopically in Type-2 diabetic rats. A composite consisting of VD3 and INS is developed that contains poly(lactic-co-glycolic acid) microparticles (MPs) embedded in a fibrin gel surrounded by a collagen matrix that is permeated with polyethylenimine (PEI)-(pBMP-2+pFGF-2) nanoplexes. Using a submuscular osteoinduction model, it is demonstrated that local delivery of INS, VD3, and PEI-(pBMP-2+pFGF-2) significantly improves bone generation compared to other treatments, thusimplicating this approach as a method to promote bone regeneration in DM patients with bone fractures.
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Affiliation(s)
- Behnoush Khorsand
- Department of Pharmaceutical Sciences and Experimental Therapeutics University of Iowa College of Pharmacy Iowa City IA 52242 USA
| | - Timothy M. Acri
- Department of Pharmaceutical Sciences and Experimental Therapeutics University of Iowa College of Pharmacy Iowa City IA 52242 USA
| | - Anh‐Vu Do
- Department of Pharmaceutical Sciences and Experimental Therapeutics University of Iowa College of Pharmacy Iowa City IA 52242 USA
| | - John E. Femino
- Department of Orthopedics and Rehabilitation University of Iowa Iowa City IA 52242 USA
| | - Emily Petersen
- Department of Orthopedics and Rehabilitation University of Iowa Iowa City IA 52242 USA
| | - Douglas C. Fredericks
- Department of Orthopedics and Rehabilitation University of Iowa Iowa City IA 52242 USA
| | - Aliasger K. Salem
- Department of Pharmaceutical Sciences and Experimental Therapeutics University of Iowa College of Pharmacy Iowa City IA 52242 USA
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28
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Li Q, Zhao C, Zhang Y, Du H, Xu T, Xu X, Zhang J, Kuang T, Lai X, Fan G, Zhang Y. 1H NMR-Based Metabolomics Coupled With Molecular Docking Reveal the Anti-Diabetic Effects and Potential Active Components of Berberis vernae on Type 2 Diabetic Rats. Front Pharmacol 2020; 11:932. [PMID: 32636751 PMCID: PMC7317004 DOI: 10.3389/fphar.2020.00932] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 06/08/2020] [Indexed: 12/12/2022] Open
Abstract
The dried stem bark of Berberis vernae C.K.Schneid., known as “Xiao-bo-pi” in Chinese, is a representative anti-diabetic herb in traditional Tibetan medical system. However, its anti-diabetic mechanisms and active components remain unclear. In this study, 1H NMR-based metabolomics, biochemistry assay, molecular docking, and network analysis were integrated to evaluate the anti-diabetic effects of B. vernae extract on type 2 diabetic rats, and to explore its active components and underlying mechanisms. Diabetes was induced by high-fat diet and streptozotocin. After 30 days of treatment, B. vernae extract significantly decreased the serum levels of fasting blood glucose, insulin, insulin resistance index, glycated serum protein, TNF-α, IL-1β, and IL-6, whereas significantly increased the serum levels of insulin sensitivity index in type 2 diabetic rats. A total of 28 endogenous metabolites were identified by 1H NMR-based metabolomics, of which 9 metabolites that were changed by diabetes were significantly reversed by B. vernae extract. The constructed compound-protein-metabolite-disease (CPMD) interaction network revealed the correlation between chemical constituents, target proteins, differential metabolites, and type 2 diabetes. Ferulic acid 4-O-β-D-glucopyranoside, bufotenidine, jatrorrhizine, and berberine showed good hit rates for both the 30 disease-related proteins and 14 differential metabolites-related proteins, indicating that these four compounds might be the active ingredients of B. vernae against type 2 diabetes. Moreover, pathway analysis revealed that the anti-diabetic mechanisms of B. vernae might be related to its regulation of several metabolic pathways (e.g., butanoate metabolism) and disease-related signal pathways (e.g., adipocytokine signaling pathway). In summary, B. vernae exerts a significant anti-diabetic effect and has potential as a drug candidate for the treatment of type 2 diabetes.
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Affiliation(s)
- Qi Li
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Chengcheng Zhao
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yunsen Zhang
- School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Huan Du
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Tong Xu
- School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xinmei Xu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jing Zhang
- School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Tingting Kuang
- School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xianrong Lai
- School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Gang Fan
- School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yi Zhang
- School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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29
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Eckhardt BA, Rowsey JL, Thicke BS, Fraser DG, O’Grady KL, Bondar OP, Hines JM, Singh RJ, Thoreson AR, Rakshit K, Lagnado AB, Passos JF, Vella A, Matveyenko AV, Khosla S, Monroe DG, Farr JN. Accelerated osteocyte senescence and skeletal fragility in mice with type 2 diabetes. JCI Insight 2020; 5:135236. [PMID: 32267250 PMCID: PMC7253018 DOI: 10.1172/jci.insight.135236] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 03/26/2020] [Indexed: 12/16/2022] Open
Abstract
The worldwide prevalence of type 2 diabetes (T2D) is increasing. Despite normal to higher bone density, patients with T2D paradoxically have elevated fracture risk resulting, in part, from poor bone quality. Advanced glycation endproducts (AGEs) and inflammation as a consequence of enhanced receptor for AGE (RAGE) signaling are hypothesized culprits, although the exact mechanisms underlying skeletal dysfunction in T2D are unclear. Lack of inducible models that permit environmental (in obesity) and temporal (after skeletal maturity) control of T2D onset has hampered progress. Here, we show in C57BL/6 mice that a onetime pharmacological intervention (streptozotocin, STZ) initiated in adulthood combined with high-fat diet-induced (HFD-induced) obesity caused hallmark features of human adult-onset T2D, including prolonged hyperglycemia, insulin resistance, and pancreatic β cell dysfunction, but not complete destruction. In addition, HFD/STZ (i.e., T2D) resulted in several changes in bone quality that closely mirror those observed in humans, including compromised bone microarchitecture, reduced biomechanical strength, impaired bone material properties, altered bone turnover, and elevated levels of the AGE CML in bone and blood. Furthermore, T2D led to the premature accumulation of senescent osteocytes with a unique proinflammatory signature. These findings highlight the RAGE pathway and senescent cells as potential targets to treat diabetic skeletal fragility.
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Affiliation(s)
| | | | | | - Daniel G. Fraser
- Division of Endocrinology
- Robert and Arlene Kogod Center on Aging
| | | | | | | | | | - Andrew R. Thoreson
- Materials and Structural Testing Core
- Department of Physical Medicine and Rehabilitation, and
| | - Kuntol Rakshit
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Anthony B. Lagnado
- Robert and Arlene Kogod Center on Aging
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - João F. Passos
- Robert and Arlene Kogod Center on Aging
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Aleksey V. Matveyenko
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Sundeep Khosla
- Division of Endocrinology
- Robert and Arlene Kogod Center on Aging
| | - David G. Monroe
- Division of Endocrinology
- Robert and Arlene Kogod Center on Aging
| | - Joshua N. Farr
- Division of Endocrinology
- Robert and Arlene Kogod Center on Aging
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
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30
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Misun PM, Yesildag B, Forschler F, Neelakandhan A, Rousset N, Biernath A, Hierlemann A, Frey O. In Vitro Platform for Studying Human Insulin Release Dynamics of Single Pancreatic Islet Microtissues at High Resolution. ADVANCED BIOSYSTEMS 2020; 4:e1900291. [PMID: 32293140 PMCID: PMC7610574 DOI: 10.1002/adbi.201900291] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Indexed: 01/18/2023]
Abstract
Insulin is released from pancreatic islets in a biphasic and pulsatile manner in response to elevated glucose levels. This highly dynamic insulin release can be studied in vitro with islet perifusion assays. Herein, a novel platform to perform glucose-stimulated insulin secretion (GSIS) assays with single islets is presented for studying the dynamics of insulin release at high temporal resolution. A standardized human islet model is developed and a microfluidic hanging-drop-based perifusion system is engineered, which facilitates rapid glucose switching, minimal sample dilution, low analyte dispersion, and short sampling intervals. Human islet microtissues feature robust and long-term glucose responsiveness and demonstrate reproducible dynamic GSIS with a prominent first phase and a sustained, pulsatile second phase. Perifusion of single islet microtissues produces a higher peak secretion rate, higher secretion during the first and second phases of insulin release, as well as more defined pulsations during the second phase in comparison to perifusion of pooled islets. The developed platform enables to study compound effects on both phases of insulin secretion as shown with two classes of insulin secretagogs. It provides a new tool for studying physiologically relevant dynamic insulin secretion at comparably low sample-to-sample variation and high temporal resolution.
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Affiliation(s)
- Patrick M. Misun
- Bio Engineering Laboratory Department of Biosystems Science and Engineering ETH Zürich Mattenstrasse 26, 4058 Basel, Switzerland
| | | | - Felix Forschler
- Bio Engineering Laboratory, Department of Biosystems Science and Engineering, ETH Zürich, Mattenstrasse 26, 4058 Basel, Switzerland
| | | | - Nassim Rousset
- Bio Engineering Laboratory, Department of Biosystems Science and Engineering, ETH Zürich, Mattenstrasse 26, 4058 Basel, Switzerland
| | | | - Andreas Hierlemann
- Bio Engineering Laboratory, Department of Biosystems Science and Engineering, ETH Zürich, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Olivier Frey
- InSphero AG Wagistrasse 27, 8952 Schlieren, Switzerland
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31
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Mitrofanova L, Hazratov A, Galkovsky B, Gorshkov A, Bobkov D, Gulyaev D, Shlyakhto E. Morphological and immunophenotypic characterization of perivascular interstitial cells in human glioma: Telocytes, pericytes, and mixed immunophenotypes. Oncotarget 2020; 11:322-346. [PMID: 32064038 PMCID: PMC6996916 DOI: 10.18632/oncotarget.27340] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 10/26/2019] [Indexed: 12/12/2022] Open
Abstract
Telocytes (Tcs) and pericytes (Pcs) are two types of perivascular interstitial cell known to be widespread in various organs and tissues, including the brain. We postulated that Tcs and Pcs may be involved in glioblastoma (GBM) neovascularization.
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Affiliation(s)
- Lubov Mitrofanova
- Almazov National Medical Research Centre, Pathomorphology Research Laboratory, St. Petersburg, Russia
| | - Anton Hazratov
- Almazov National Medical Research Centre, Pathomorphology Research Laboratory, St. Petersburg, Russia
| | - Boris Galkovsky
- Almazov National Medical Research Centre, Pathomorphology Research Laboratory, St. Petersburg, Russia
| | - Andrey Gorshkov
- Almazov National Medical Research Centre, Pathomorphology Research Laboratory, St. Petersburg, Russia.,Smorodintsev Research Institute of Influenza, Laboratory of Intracellular Signaling and Transport, St. Petersburg, Russia
| | - Danila Bobkov
- Smorodintsev Research Institute of Influenza, Laboratory of Intracellular Signaling and Transport, St. Petersburg, Russia.,Institute of Cytology of the Russian Academy of Science, Laboratory of Cell Biology in Culture, St. Petersburg, Russia
| | - Dmitry Gulyaev
- Almazov National Medical Research Centre, Research Department of Neurosurgery, St. Petersburg, Russia
| | - Evgeny Shlyakhto
- Almazov National Medical Research Centre, General Director, St. Petersburg, Russia
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32
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Huo K, Li X, Hu W, Song X, Zhang D, Zhang X, Chen X, Yuan J, Zuo J, Wang X. RFRP-3, the Mammalian Ortholog of GnIH, Is a Novel Modulator Involved in Food Intake and Glucose Homeostasis. Front Endocrinol (Lausanne) 2020; 11:194. [PMID: 32328034 PMCID: PMC7160250 DOI: 10.3389/fendo.2020.00194] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 03/18/2020] [Indexed: 11/13/2022] Open
Abstract
RF amide-related peptide 3 (RFRP-3) is a reproductive inhibitor and an endogenous orexigenic neuropeptide that may be involved in energy homeostasis. In this study, we evaluated the effect of acute or chronic RFRP-3 treatment (administered via intraperitoneal injection) on the food intake, meal microstructure and weight of rats, as well as the mechanism through which RFRP-3 is involved in glucose metabolism in the pancreas and glucose disposal tissues of rat in vivo. Our results showed that the intraperitoneal administration of RFRP-3 to rats resulted in marked body mass increased, hyperphagia, hyperlipidemia, hyperglycemia, glucose intolerance, hypoinsulinism, hyperglucagon, and insulin resistance, as well as significant increases in the size of pancreatic islets and the inflammatory reaction. Thus, we strongly assert that RFRP-3 as a novel neuroendocrine regulator involved in blood glucose homeostasis.
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33
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Zheng L, Wang Y, Yang B, Zhang B, Wu Y. Islet Transplantation Imaging in vivo. Diabetes Metab Syndr Obes 2020; 13:3301-3311. [PMID: 33061492 PMCID: PMC7520574 DOI: 10.2147/dmso.s263253] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 07/29/2020] [Indexed: 12/31/2022] Open
Abstract
Although islet transplantation plays an effective and powerful role in the treatment of diabetes, a large amount of islet grafts are lost at an early stage due to instant blood-mediated inflammatory reactions, immune rejection, and β-cell toxicity resulting from immunosuppressive agents. Timely intervention based on the viability and function of the transplanted islets at an early stage is crucial. Various islet transplantation imaging techniques are available for monitoring the conditions of post-transplanted islets. Due to the development of various imaging modalities and the continuous study of contrast agents, non-invasive islet transplantation imaging in vivo has made great progress. The tracing and functional evaluation of transplanted islets in vivo have thus become possible. However, most studies on contrast agent and imaging modalities are limited to animal experiments, and long-term toxicity and stability need further evaluation. Accordingly, the clinical application of the current achievements still requires a large amount of effort. In this review, we discuss the contrast agents for MRI, SPECT/PET, BLI/FI, US, MPI, PAI, and multimodal imaging. We further summarize the advantages and limitations of various molecular imaging methods.
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Affiliation(s)
- Lei Zheng
- Department of Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou310000, People’s Republic of China
| | - Yinghao Wang
- Department of Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou310000, People’s Republic of China
| | - Bin Yang
- Department of Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou310000, People’s Republic of China
- Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, Cancer Institute, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou310000, People’s Republic of China
| | - Bo Zhang
- Department of Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou310000, People’s Republic of China
- Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, Cancer Institute, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou310000, People’s Republic of China
- Correspondence: Bo Zhang; Yulian Wu Department of Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou310000, People’s Republic of China Tel/Fax +86 571 87783563 Email ;
| | - Yulian Wu
- Department of Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou310000, People’s Republic of China
- Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, Cancer Institute, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou310000, People’s Republic of China
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34
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Bouldjennet F, Gjesing AP, Azzouz M, Abderrahman SA, El Guecier A, Ali S, Oudjit B, Mennadi-Lacete F, Yargui L, Boudiba A, Chibane A, Touil-Boukoffa C, Hansen T, Raache R. Maturity-Onset Diabetes of the Young Identified Among Algerian Probands with Early-Onset Diabetes. Diabetes Metab Syndr Obes 2020; 13:4829-4837. [PMID: 33324081 PMCID: PMC7733395 DOI: 10.2147/dmso.s269251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 11/03/2020] [Indexed: 11/29/2022] Open
Abstract
AIM To investigate the prevalence of variants within selected maturity-onset diabetes of the young (MODY)-genes among Algerian patients initially diagnosed with type 1 diabetes (T1D) or type 2 diabetes (T2D), yet presenting with a MODY-like phenotype. METHODS Eight unrelated patients with early-onset diabetes (before 30 years) and six relatives with diabetes were examined by targeted re-sequencing for variants in genes known to be involved in MODY (HNF1A, GCK, HNF4A, HNF1B, INS, ABCC8, KCNJ1). Clinical data for probands were retrieved from hospital records. RESULTS A total of 12 variants were identified, of which three were classified as pathogenic and one as a variant of uncertain clinical significance (VUS). Two of the pathogenic variants were found in GCK (p.Gly261Arg and p.Met210Lys, respectively) in one proband each and the remaining pathogenic variant was found in HNF1B (p.Gly76Cys) in a proband also carrying the VUS in HNF1A (p.Thr156Met). CONCLUSION Variants in known MODY-genes can be the cause of early-onset diabetes in Algerians diagnosed with T1D or T2D among patients presenting with a MODY-like phenotype; thus, genetic screening should be considered.
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Affiliation(s)
- Faiza Bouldjennet
- Laboratory of Cellular and Molecular Biology, Cytokine and NO Synthase Team, University of Science and Technology, Houari Boumediene (USTHB), Algiers, Algeria
| | - Anette P Gjesing
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
- Correspondence: Anette P Gjesing; Rachida Raache Email ;
| | - Malha Azzouz
- Diabetology Department of Mustapha Pacha Hospital, Algiers, Algeria
| | | | - Amina El Guecier
- Internal Medicine Department of Djillali Bounaâma Hospital, Algiers, Algeria
| | - Said Ali
- Laboratory of Biochemistry, Mustapha Pacha, Algiers, Algeria
| | - Brahim Oudjit
- Diabetology Department of Mohamed Seghir Nekkache Hospital, Algiers, Algeria
| | | | - Lyèce Yargui
- Laboratory of Biochemistry, Mustapha Pacha, Algiers, Algeria
| | - Aissa Boudiba
- Diabetology Department of Mustapha Pacha Hospital, Algiers, Algeria
| | - Ahcène Chibane
- Internal Medicine Department of Djillali Bounaâma Hospital, Algiers, Algeria
| | - Chafia Touil-Boukoffa
- Laboratory of Cellular and Molecular Biology, Cytokine and NO Synthase Team, University of Science and Technology, Houari Boumediene (USTHB), Algiers, Algeria
| | - Torben Hansen
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Rachida Raache
- Laboratory of Cellular and Molecular Biology, Cytokine and NO Synthase Team, University of Science and Technology, Houari Boumediene (USTHB), Algiers, Algeria
- Correspondence: Anette P Gjesing; Rachida Raache Email ;
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35
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Zhang P, Wang Q, Nie L, Zhu R, Zhou X, Zhao P, Ji N, Liang X, Ding Y, Yuan Q, Wang Q. Hyperglycemia-induced inflamm-aging accelerates gingival senescence via NLRC4 phosphorylation. J Biol Chem 2019; 294:18807-18819. [PMID: 31676687 DOI: 10.1074/jbc.ra119.010648] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 10/17/2019] [Indexed: 02/05/2023] Open
Abstract
Inflamm-aging was recently affiliated with the progression of diabetic complications. Local cellular senescence together with senescence-associated secretory phenotype (SASP) are the main contributors to inflamm-aging. However, little is known about their involvement in diabetic periodontitis. Gingiva is the first line of host defense in the periodontium, and macrophages are key SASP-carrying cells. Here, we explored the molecular mechanism by which hyperglycemia drives the inflamm-aging in the gingival tissue of diabetic mice and macrophages. We demonstrated that hyperglycemia increased the infiltrated macrophage senescence in gingival tissue of diabetic mice. Simultaneously, hyperglycemia elevated the local burden of senescent cells in gingival tissue and induced the serum secretion of SASP factors in vivo Moreover, in vitro, high glucose induced macrophage senescence and SASP factors secretion through phosphorylation of NLRC4, which further stimulated the NF-κB/Caspase-1 cascade via an IRF8-dependent pathway. Deletion of NLRC4 or IRF8 abolished hyperglycemia-induced cellular senescence and SASP in macrophages. In addition, we found that treatment with metformin inhibited NLRC4 phosphorylation and remarkably decreased cellular senescence and SASP in the context of hyperglycemia. Our data demonstrated that hyperglycemia induces the development of inflamm-aging in gingival tissue and suggested that NLRC4 is a potential target for treatment of diabetes-associated complications.
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Affiliation(s)
- Peng Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Qian Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Lulingxiao Nie
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Rui Zhu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xinyi Zhou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Pengfei Zhao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Ning Ji
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xing Liang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Yi Ding
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Department of Periodontology, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Quan Yuan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Qi Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
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36
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Steffensen LB, Conover CA, Oxvig C. PAPP-A and the IGF system in atherosclerosis: what's up, what's down? Am J Physiol Heart Circ Physiol 2019; 317:H1039-H1049. [PMID: 31518159 DOI: 10.1152/ajpheart.00395.2019] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Pregnancy-associated plasma protein-A (PAPP-A) is a metalloproteinase with a well-established role in releasing bioactive insulin-like growth factor-1 (IGF-1) from IGF-binding protein-2, -4, and -5 by proteolytic processing of these. The IGF system has repeatedly been suggested to be involved in the pathology of atherosclerosis, and both PAPP-A and IGF-1 are proposed biomarkers and therapeutic targets for this disease. Several experimental approaches based on atherosclerosis mouse models have been undertaken to obtain causative and mechanistic insight to the role of these molecules in atherogenesis. However, reports seem conflicting. The literature suggests that PAPP-A is detrimental, while IGF-1 is beneficial. This raises important questions that need to be addressed. Here we summarize the various studies and discuss potential underlying explanations for this seemingly inconsistency with the objective of better understanding complexities and limitations when manipulating the IGF system in mouse models of atherosclerosis. A debate clarifying what's up and what's down is highly warranted going forward with the ultimate goal of improving atherosclerosis therapy by targeting the IGF system.
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Affiliation(s)
- Lasse B Steffensen
- Centre for Individualized Medicine in Arterial Diseases, Odense University Hospital, Odense, Denmark
| | | | - Claus Oxvig
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
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37
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Sarmiento BE, Santos Menezes LF, Schwartz EF. Insulin Release Mechanism Modulated by Toxins Isolated from Animal Venoms: From Basic Research to Drug Development Prospects. Molecules 2019; 24:E1846. [PMID: 31091684 PMCID: PMC6571724 DOI: 10.3390/molecules24101846] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 04/23/2019] [Accepted: 05/09/2019] [Indexed: 12/12/2022] Open
Abstract
Venom from mammals, amphibians, snakes, arachnids, sea anemones and insects provides diverse sources of peptides with different potential medical applications. Several of these peptides have already been converted into drugs and some are still in the clinical phase. Diabetes type 2 is one of the diseases with the highest mortality rate worldwide, requiring specific attention. Diverse drugs are available (e.g., Sulfonylureas) for effective treatment, but with several adverse secondary effects, most of them related to the low specificity of these compounds to the target. In this context, the search for specific and high-affinity compounds for the management of this metabolic disease is growing. Toxins isolated from animal venom have high specificity and affinity for different molecular targets, of which the most important are ion channels. This review will present an overview about the electrical activity of the ion channels present in pancreatic β cells that are involved in the insulin secretion process, in addition to the diversity of peptides that can interact and modulate the electrical activity of pancreatic β cells. The importance of prospecting bioactive peptides for therapeutic use is also reinforced.
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Affiliation(s)
- Beatriz Elena Sarmiento
- Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF 70910-900, Brazil.
| | - Luis Felipe Santos Menezes
- Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF 70910-900, Brazil.
| | - Elisabeth F Schwartz
- Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF 70910-900, Brazil.
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38
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Methylglyoxal – An emerging biomarker for diabetes mellitus diagnosis and its detection methods. Biosens Bioelectron 2019; 133:107-124. [DOI: 10.1016/j.bios.2019.03.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 03/07/2019] [Accepted: 03/07/2019] [Indexed: 02/07/2023]
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39
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Capozzi ME, Svendsen B, Encisco SE, Lewandowski SL, Martin MD, Lin H, Jaffe JL, Coch RW, Haldeman JM, MacDonald PE, Merrins MJ, D'Alessio DA, Campbell JE. β Cell tone is defined by proglucagon peptides through cAMP signaling. JCI Insight 2019; 4:126742. [PMID: 30720465 DOI: 10.1172/jci.insight.126742] [Citation(s) in RCA: 159] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 01/29/2019] [Indexed: 01/05/2023] Open
Abstract
Paracrine interactions between pancreatic islet cells have been proposed as a mechanism to regulate hormone secretion and glucose homeostasis. Here, we demonstrate the importance of proglucagon-derived peptides (PGDPs) for α to β cell communication and control of insulin secretion. Signaling through this system occurs through both the glucagon-like peptide receptor (Glp1r) and glucagon receptor (Gcgr). Loss of PGDPs, or blockade of their receptors, decreases insulin secretion in response to both metabolic and nonmetabolic stimulation of mouse and human islets. This effect is due to reduced β cell cAMP and affects the quantity but not dynamics of insulin release, indicating that PGDPs dictate the magnitude of insulin output in an isolated islet. In healthy mice, additional factors that stimulate cAMP can compensate for loss of PGDP signaling; however, input from α cells is essential to maintain glucose tolerance during the metabolic stress induced by high-fat feeding. These findings demonstrate an essential role for α cell regulation of β cells, raising the possibility that abnormal paracrine signaling contributes to impaired insulin secretion in diabetes. Moreover, these findings support reconsideration of the role for α cells in postprandial glucose control.
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Affiliation(s)
- Megan E Capozzi
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, USA
| | - Berit Svendsen
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, USA
| | - Sara E Encisco
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, USA
| | - Sophie L Lewandowski
- Department of Medicine, Division of Endocrinology, Diabetes & Metabolism, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Mackenzie D Martin
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, USA
| | - Haopeng Lin
- Department of Pharmacology and Alberta Diabetes Institute, University of Alberta, Alberta, Canada
| | - Justin L Jaffe
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, USA
| | - Reilly W Coch
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, USA.,Department of Medicine and
| | - Jonathan M Haldeman
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, USA.,Department of Pharmacology and Cancer Biology, Duke University, Durham, North Carolina, USA
| | - Patrick E MacDonald
- Department of Pharmacology and Alberta Diabetes Institute, University of Alberta, Alberta, Canada
| | - Matthew J Merrins
- Department of Medicine, Division of Endocrinology, Diabetes & Metabolism, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - David A D'Alessio
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, USA.,Department of Medicine and
| | - Jonathan E Campbell
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, USA.,Department of Medicine and.,Department of Pharmacology and Cancer Biology, Duke University, Durham, North Carolina, USA
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40
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In Vivo Rodent Models of Type 2 Diabetes and Their Usefulness for Evaluating Flavonoid Bioactivity. Nutrients 2019; 11:nu11030530. [PMID: 30823474 PMCID: PMC6470730 DOI: 10.3390/nu11030530] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 02/19/2019] [Accepted: 02/22/2019] [Indexed: 01/10/2023] Open
Abstract
About 40% of the world’s population is overweight or obese and exist at risk of developing type 2 diabetes mellitus (T2D). Obesity is a leading pathogenic factor for developing insulin resistance (IR). It is well established that IR and a progressive decline in functional β-cell mass are hallmarks of developing T2D. In order to mitigate the global prevalence of T2D, we must carefully select the appropriate animal models to explore the cellular and molecular mechanisms of T2D, and to optimize novel therapeutics for their safe use in humans. Flavonoids, a group of polyphenols, have drawn great interest for their various health benefits, and have been identified in naturally occurring anti-diabetic compounds. Results from many clinical and animal studies demonstrate that dietary intake of flavonoids might prove helpful in preventing T2D. In this review, we discuss the currently available rodent animal models of T2D and analyze the advantages, the limitations of each T2D model, and highlight the potential anti-diabetic effects of flavonoids as well as the mechanisms of their actions.
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41
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Ding L, Han L, Dube J, Billadeau DD. WASH Regulates Glucose Homeostasis by Facilitating Glut2 Receptor Recycling in Pancreatic β-Cells. Diabetes 2019; 68:377-386. [PMID: 30425062 DOI: 10.2337/db18-0189] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 10/31/2018] [Indexed: 11/13/2022]
Abstract
WASH is an endosomal protein belonging to the Wiskott-Aldrich syndrome protein superfamily that participates in endosomal receptor trafficking by facilitating tubule fission via activation of the ubiquitously expressed Arp2/3 complex. While several studies have begun to elucidate an understanding of the functions of WASH in cells lines, the in vivo function of WASH has not been fully elucidated, since total body deletion in mice leads to early embryonic lethality. To circumvent this problem, we have used a WASH conditional knockout mouse model to investigate the role of WASH in the pancreas. We find that pancreas-specific deletion of WASH leads to impaired blood glucose clearance and reduced insulin release upon glucose stimulation. Furthermore, WASH depletion results in impaired trafficking of Glut2 in pancreatic β-cells as a consequence of an intracellular accumulation of Glut2 and overall decreased levels of Glut2 protein. Taken together, these results indicate that WASH participates in pancreatic β-cell glucose sensing and whole-body glucose homeostasis. Thus, patients harboring mutations in components of the WASH complex could be at risk for developing type 2 diabetes.
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Affiliation(s)
- Li Ding
- Division of Oncology Research and Schulze Center for Novel Therapeutics, Mayo Clinic, Rochester, MN
| | - Lingling Han
- Division of Oncology Research and Schulze Center for Novel Therapeutics, Mayo Clinic, Rochester, MN
| | - John Dube
- Division of Oncology Research and Schulze Center for Novel Therapeutics, Mayo Clinic, Rochester, MN
| | - Daniel D Billadeau
- Division of Oncology Research and Schulze Center for Novel Therapeutics, Mayo Clinic, Rochester, MN
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42
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Sternisha SM, Miller BG. Molecular and cellular regulation of human glucokinase. Arch Biochem Biophys 2019; 663:199-213. [PMID: 30641049 DOI: 10.1016/j.abb.2019.01.011] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 01/09/2019] [Accepted: 01/10/2019] [Indexed: 01/23/2023]
Abstract
Glucose metabolism in humans is tightly controlled by the activity of glucokinase (GCK). GCK is predominantly produced in the pancreas, where it catalyzes the rate-limiting step of insulin secretion, and in the liver, where it participates in glycogen synthesis. A multitude of disease-causing mutations within the gck gene have been identified. Activating mutations manifest themselves in the clinic as congenital hyperinsulinism, while loss-of-function mutations produce several diabetic conditions. Indeed, pharmaceutical companies have shown great interest in developing GCK-associated treatments for diabetic patients. Due to its essential role in maintaining whole-body glucose homeostasis, GCK activity is extensively regulated at multiple levels. GCK possesses a unique ability to self-regulate its own activity via slow conformational dynamics, which allows for a cooperative response to glucose. GCK is also subject to a number of protein-protein interactions and post-translational modification events that produce a broad range of physiological consequences. While significant advances in our understanding of these individual regulatory mechanisms have been recently achieved, how these strategies are integrated and coordinated within the cell is less clear. This review serves to synthesize the relevant findings and offer insights into the connections between molecular and cellular control of GCK.
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Affiliation(s)
- Shawn M Sternisha
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Brian G Miller
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA.
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Analysis of pituitary adenoma expression patterns suggests a potential role for the NeuroD1 transcription factor in neuroendocrine tumor-targeting therapies. Oncotarget 2019; 10:289-312. [PMID: 30719226 PMCID: PMC6349459 DOI: 10.18632/oncotarget.26513] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 12/10/2018] [Indexed: 11/25/2022] Open
Abstract
NeuroD1’s roles in the pathogenesis of pituitary adenomas and in the biology of the normal adult pituitary gland have been insufficiently researched. Much of the work investigating its expression patterns has yielded contradictory results. Objective: morphological study of NeuroD1 transcription factor expression in different types of pituitary adenomas and in normal adult human pituitary glands. Materials and methods: This study analyzed 48 pituitary adenomas and nine normal pituitary glands. In all cases, immunohistochemical study was performed with antibodies to NeuroD1, 6 hormones of adenohypophysis, Ki-67, and CK7. We used confocal laser scanning microscopy, electron microscopy and electron immunocytochemistry. Results: NeuroD1 expression was detected in all cases of plurihormonal adenomas, mammosomatotropinomas, corticotropinomas, prolactinomas, gonadotropinomas, null-cell pituitary adenomas, and in normal pituitary glands. The average numbers of NeuroD1 expressing cells in normal adenohypophysis specimens were significantly lower than in the adenomas overall (p=0.006). NeuroD1 expression was confirmed by several methods (in prolactinomas, by double stain immunohistochemistry; in mammosomatotropinomas, by double stain immunohistochemistry, confocal laser scanning microscopy, and electron immunocytochemistry; and in somatotropinomas, by electron immunocytochemistry). Conclusion: Immunohistochemistry, confocal microscopy, and double label electron immunocytochemistry confirmed NeuroD1’s key role in the pathogenesis of pituitary tumors, regardless of their hormonal state. Its expression level in pituitary adenomas is significantly higher than in the normal pituitary gland and has no reliable correlation with any studied hormones or Ki-67. These findings suggest that NeuroD1 should be investigated further as a potential molecular target in tumor-targeting therapies.
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TALLURI MR, TADI RS, BATTU GR, ZUBAIR M. The Glucose Lowering Effect of Zornia gibbosa Span Extracts in Diabetic Rats. Turk J Pharm Sci 2018; 15:339-346. [PMID: 32454679 PMCID: PMC7227828 DOI: 10.4274/tjps.02486] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 11/09/2017] [Indexed: 01/14/2023]
Abstract
OBJECTIVES Diabetes mellitus is a chronic, lifelong condition that affects our body physiology. Untreated diabetes mellitus causes diseases such as diabetic retinopathy, diabetic nephropathy and diabetic neuropathy, auto immune diseases, polyuria, polydipsia, loss of weight, and cardiovascular diseases. The use of medications for the treatment of diabetes mellitus causes adverse effects with long-term use, and sometimes leads to death. Today, researchers are working on the discovery of new anti-diabetes drugs from plants with low or no adverse effects. From this point of view, the present work was conducted to evaluate the anti-diabetic activity of Zornia gibbosa Span. MATERIALS AND METHODS This acute toxicity study was conducted for ethyl acetate and ethanol (70%v/v) extracts of Z. gibbosa as per OECD guidelines. The anti-diabetic activity of selected plant extracts were tested using alloxan-induced diabetes in a rat model. RESULTS No mortality was observed in the administered doses of Zornia gibbosa Span extracts. The tested extracts significantly (p≤0.01) restored the physiologic changes that occurred due to the alloxan-induced diabetes mellitus. The hydroalcoholic extracts at 500 mg/kg body weight concentration showed more activity compared with other extracts at different concentrations along with standard drug (glibenclamide). Zornia gibbosa significantly decreased glucose concentrations and restored the altered enzymes levels caused by damage to different organs by diabetes. CONCLUSION The results of the present study indicate that Z. gibbosa has a significant anti-diabetic activity. Therefore, it may be capable of use as an alternate medicine along with allopathic medicine in the treatment of diabetes as well as its health problems.
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Affiliation(s)
| | - Rajananda Swamy TADI
- Andhra University, College of Pharmaceutical Sciences, Department of Pharmacognosy and Phytochemistry, Andra Pradesh, India
| | - Ganga Rao BATTU
- Andhra University, College of Pharmaceutical Sciences, Department of Pharmacognosy and Phytochemistry, Andra Pradesh, India
| | - Mohammad ZUBAIR
- University of Tabuk, Faculty of Medicine, Department of Medical Microbiology, Tabuk, Kingdom of Saudi Arabia
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Wang Y, Li M, Ni Z. Primary study on the hypoglycemic mechanism of 5rolGLP-HV in STZ-induced type 2 diabetes mellitus mice. J Biosci 2018. [DOI: 10.1007/s12038-018-9809-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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46
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Ugrankar R, Theodoropoulos P, Akdemir F, Henne WM, Graff JM. Circulating glucose levels inversely correlate with Drosophila larval feeding through insulin signaling and SLC5A11. Commun Biol 2018; 1:110. [PMID: 30271990 PMCID: PMC6123810 DOI: 10.1038/s42003-018-0109-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 07/03/2018] [Indexed: 12/27/2022] Open
Abstract
In mammals, blood glucose levels likely play a role in appetite regulation yet the mechanisms underlying this phenomenon remain opaque. Mechanisms can often be explored from Drosophila genetic approaches. To determine if circulating sugars might be involved in Drosophila feeding behaviors, we scored hemolymph glucose and trehalose, and food ingestion in larvae subjected to various diets, genetic mutations, or RNAi. We found that larvae with glucose elevations, hyperglycemia, have an aversion to feeding; however, trehalose levels do not track with feeding behavior. We further discovered that insulins and SLC5A11 may participate in glucose-regulated feeding. To see if food aversion might be an appropriate screening method for hyperglycemia candidates, we developed a food aversion screen to score larvae with abnormal feeding for glucose. We found that many feeding defective larvae have glucose elevations. These findings highlight intriguing roles for glucose in fly biology as a potential cue and regulator of appetite. Rupali Ugrankar et al. show that Drosophila larvae with high levels of circulating glucose, but not trehalose, don’t eat much. This study suggests that circulating glucose communicates with insulin signaling and the sodium/solute co-transporter SLC5A11 in the brain to suppress larval appetite.
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Affiliation(s)
- Rupali Ugrankar
- Department of Developmental Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390, USA. .,Department of Cell Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390, USA.
| | - Pano Theodoropoulos
- Department of Developmental Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390, USA
| | - Fatih Akdemir
- Department of Developmental Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390, USA.,Department of Basic Sciences, Medical Biology, Ataturk University, 25240 Erzurum, Turkey
| | - W Mike Henne
- Department of Cell Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390, USA
| | - Jonathan M Graff
- Department of Developmental Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390, USA. .,Department of Molecular Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390, USA. .,Department of Internal Medicine, Division of Endocrinology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390, USA.
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Zhang M, Li Y, Rao P, Huang K, Luo D, Cai X, Xiao J. Blockade of receptors of advanced glycation end products ameliorates diabetic osteogenesis of adipose-derived stem cells through DNA methylation and Wnt signalling pathway. Cell Prolif 2018; 51:e12471. [PMID: 30014569 DOI: 10.1111/cpr.12471] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 04/18/2018] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVES Diabetes mellitus-related osteoporosis is caused by the imbalance between bone absorption and bone formation. Advanced glycation end products (AGEs) are considered a cause of diabetic osteoporosis. Although adipose-derived stem cells (ASCs) are promising adult stem cells in bone tissue regeneration, the ability of osteogenesis of ASCs in diabetic environment needs to explore. This study aimed to investigate the influence of AGEs on the osteogenic potential of ASCs and to explore the signalling pathways involved in its effect. MATERIALS AND METHODS ASCs were isolated from inguinal fat and cultured in osteogenic media with or without AGEs and FPS-ZM1, an inhibitor of receptor for AGEs (RAGE). Alizarin red-S, Oil Red-O and Alcian blue staining were used to confirm osteogenic, adipogenic and chondrogenic potential of ASCs, respectively. Immunofluorescence, western blotting and real-time PCR were used to measure changes in markers of osteogenic differentiation, DNA methylation and Wnt signalling. RESULTS The multipotentiality of ASCs was confirmed. Treated with AGEs, OPN and RUNX2 expressions of ASCs were reduced and there was a noticeable loss of mineralization, concomitant with an increase in the expression of RAGE, 5-MC, DNMT1 and DNMT3a. AGEs treatment also led to a loss of Wnt signalling pathway markers, including β-Catenin and LEF1, with an increase in GSK-3β. Treatment with the RAGE inhibitor, FPS-ZM1, rescued AGEs-induced loss of osteogenic potential, modulated DNA methylation and upregulated Wnt signalling in ASCs. CONCLUSIONS Our results demonstrate that AGEs-RAGE signalling inhibits the osteogenic potential of ASCs under osteoinductive conditions by modulating DNA methylation and Wnt signalling. FPS-ZM1 can rescue the negative effects of AGEs and provide a possible treatment for bone tissue regeneration in patients with diabetic osteoporosis.
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Affiliation(s)
- Maorui Zhang
- Department of Oral Implantology, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Orofacial Reconstruction and Regeneration Laboratory, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China
| | - Yong Li
- Department of Oral Implantology, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Orofacial Reconstruction and Regeneration Laboratory, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China
| | - Pengcheng Rao
- Orofacial Reconstruction and Regeneration Laboratory, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China
| | - Kui Huang
- Orofacial Reconstruction and Regeneration Laboratory, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China
| | - Daowen Luo
- Orofacial Reconstruction and Regeneration Laboratory, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China
| | - Xiaoxiao Cai
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jingang Xiao
- Department of Oral Implantology, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China.,Orofacial Reconstruction and Regeneration Laboratory, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China.,Department of Oral and Maxillofacial Surgery, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China
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Rizvi S, Raza ST, Mahdi F, Singh SP, Rajput M, Rahman Q. Genetic polymorphisms inKCNJ11 (E23K, rs5219)andSDF-1β (G801A, rs1801157)genes are associated with the risk of type 2 diabetes mellitus. Br J Biomed Sci 2018; 75:139-144. [DOI: 10.1080/09674845.2018.1473939] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- S Rizvi
- Molecular Biology Lab, Department of Biochemistry, Era’s Lucknow Medical College and Hospital , Lucknow, India
- Science and Technology, Amity Institute of Biotechnology, Amity University Uttar Pradesh , Lucknow, India
| | - ST Raza
- Molecular Biology Lab, Department of Biochemistry, Era’s Lucknow Medical College and Hospital , Lucknow, India
| | - F Mahdi
- Molecular Biology Lab, Department of Biochemistry, Era’s Lucknow Medical College and Hospital , Lucknow, India
| | - SP Singh
- Molecular Biology Lab, Department of Biochemistry, Era’s Lucknow Medical College and Hospital , Lucknow, India
| | - M Rajput
- Molecular Biology Lab, Department of Biochemistry, Era’s Lucknow Medical College and Hospital , Lucknow, India
| | - Q Rahman
- Science and Technology, Amity Institute of Biotechnology, Amity University Uttar Pradesh , Lucknow, India
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Jiang D, Wan F. Exendin-4 protects INS-1 cells against palmitate-induced apoptosis through the IRE1α-Xbp1 signaling pathway. Exp Ther Med 2018; 16:1029-1035. [PMID: 30112049 DOI: 10.3892/etm.2018.6240] [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: 07/19/2017] [Accepted: 05/24/2018] [Indexed: 12/16/2022] Open
Abstract
The anti-apoptotic effect of the incretin analog, exendin-4 (EX-4) on pancreatic β cells is mediated via the activation of protein kinase B (Akt) signaling, and its effect is partly produced through the inhibition of endoplasmic reticulum (ER) stress. However, the molecular mechanisms that underlie the effect of EX-4 on the suppression of ER stress and the upregulation of Akt signaling are poorly understood. Inositol-requiring enzyme 1 (IRE1), a member of the ER-localized transmembrane protein family, activates its downstream transcription factor X-box binding protein 1 (XBP1) to mediate a key part of the cellular unfolded protein response in order to cope with ER stress. Using the clonal rat pancreatic β cell line INS-1, the present study produced an in vitro model of ER stress using palmitate (PA) in order to determine whether the beneficial effect of EX-4 under ER stress was regulated by the IRE1α-Xbp1 signaling pathway. The results demonstrated that the reduction in ER stress and the activation Akt by EX-4 may be associated with the upregulation of IRE1α phosphorylation and the splicing of Xbp1 mRNA, which improved PA-reduced cell viability. This effect was partially abrogated by the knockdown of IRE1α with small interfering RNA. Additionally, cellular IRE1α was phosphorylated by the protein kinase A (PKA) associated with EX-4 and the activation of IRE1α, as IRE1α phosphorylation was attenuated by the inhibition of PKA with its inhibitor. In conclusion, the data identified the IRE1α-Xbp1 signaling pathway as an essential mediator that associates EX-4 with the intracellular mechanism that inhibits ER stress and activates Akt in order to regulate β cell survival. This may provide important evidence for the use of EX-4 in treatments for type 2 diabetes.
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Affiliation(s)
- Dongdong Jiang
- Department of Endocrinology and Metabolism, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, P.R. China
| | - Fang Wan
- Department of Orthopedic Sports Medicine, Huashan Hospital, Fudan University, Shanghai 200040, P.R. China
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50
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Waldum HL, Öberg K, Sørdal ØF, Sandvik AK, Gustafsson BI, Mjønes P, Fossmark R. Not only stem cells, but also mature cells, particularly neuroendocrine cells, may develop into tumours: time for a paradigm shift. Therap Adv Gastroenterol 2018; 11:1756284818775054. [PMID: 29872453 PMCID: PMC5974566 DOI: 10.1177/1756284818775054] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Accepted: 04/03/2018] [Indexed: 02/04/2023] Open
Abstract
Stem cells are considered the origin of neoplasms in general, and malignant tumours in particular, and the stage at which the stem cells stop their differentiation determines the degree of malignancy. However, there is increasing evidence supporting an alternative paradigm. Tumours may develop by dedifferentiation from mature cells able to proliferate. Studies of gastric carcinogenesis demonstrate that mature neuroendocrine (NE) cells upon long-term overstimulation may develop through stages of hyperplasia, dysplasia, and rather benign tumours, into highly malignant carcinomas. Dedifferentiation of cells may change the histological appearance and impede the identification of the cellular origin, as seen with gastric carcinomas, which in many cases are dedifferentiated neuroendocrine tumours. Finding the cell of origin is important to identify risk factors for cancer, prevent tumour development, and tailor treatment. In the present review, we focus not only on gastric tumours, but also evaluate the role of neuroendocrine cells in tumourigenesis in two other foregut-derived organs, the lungs and the pancreas, as well as in the midgut-derived small intestine.
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Affiliation(s)
- Helge L. Waldum
- Department of Cancer Research and Molecular Medicine, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, N-7491, Norway Department of Gastroenterology and Hepatology, St. Olav’s University Hospital, Trondheim, Norway
| | - Kjell Öberg
- Department of Endocrine Oncology Uppsala University and University Hospital, Uppsala, Sweden
| | - Øystein F. Sørdal
- Department of Gastroenterology and Hepatology, St. Olav’s University Hospital, Trondheim, Norway
| | - Arne K. Sandvik
- Department of Cancer Research and Molecular Medicine, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
- Department of Gastroenterology and Hepatology, St. Olav’s University Hospital, Trondheim, Norway
| | - Bjørn I. Gustafsson
- Department of Cancer Research and Molecular Medicine, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
- Department of Gastroenterology and Hepatology, St. Olav’s University Hospital, Trondheim, Norway
| | - Patricia Mjønes
- epartment of Cancer Research and Molecular Medicine, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
- Department of Pathology, St. Olav’s University Hospital, Trondheim, Norway
| | - Reidar Fossmark
- Department of Cancer Research and Molecular Medicine, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
- Department of Gastroenterology and Hepatology, St. Olav’s University Hospital, Trondheim, Norway
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