24351
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Differentiation of stem cells into insulin-producing cells: current status and challenges. Arch Immunol Ther Exp (Warsz) 2013; 61:149-58. [PMID: 23283518 DOI: 10.1007/s00005-012-0213-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Accepted: 12/20/2012] [Indexed: 12/17/2022]
Abstract
Diabetes mellitus is one of the most serious public health challenges of the twenty-first century. Allogenic islet transplantation is an efficient therapy for type 1 diabetes. However, immune rejection, side effects of immunosuppressive treatment as well as lack of sufficient donor organs limits its potential. In recent years, several promising approaches for generation of new pancreatic β cells have been developed. This review provides an overview of current status of pancreatic and extra-pancreatic stem cells differentiation into insulin-producing cells and the possible application of these cells for diabetes treatment. The PubMed database was searched for English language articles published between 2001 and 2012, using the keyword combinations: diabetes mellitus, differentiation, insulin-producing cells, stem cells.
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24352
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Shaghaghi A, Piri M, Allahverdipour H, Asghari-Jafarabadi M. Recess Activity and General Health Status among Iranian Elementary Schools' Pupils. Health Promot Perspect 2013; 3:45-54. [PMID: 24688952 DOI: 10.5681/hpp.2013.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2013] [Accepted: 08/05/2013] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Regular and daily physical activity during childhood and at school is one of the important part of requirements of normal growth, development and well-being. To achieve physical activity promotion among school child aged population recess as outside of class time efforts is scheduled and allows students to engage in physical and social activities. The purpose of the present study was to assess recess activities as well as status of physical activities among a sample of Iranian students at the primary schools. METHODS This cross-sectional study was performed in four randomly selected schools from a list of 26 elementary schools in March, 2012 in the city of Shahindej, located in North-west of Iran. Participants were 439 (10-12 years) elementary schools'. Physical activity level by self-reporting, mental health using the parent-completed Child Health Questionnaire, and happiness was assessed using a Persian translated version of the Subjective Happiness Scale. Hierarchical logistic regression analysis was applied in two steps using the enter method to analyze data in the SPSS version 17. RESULTS Backward logistic regression analysis showed that gender of the parent who answered the study questions, father's education, educational grade of children, BMI, physical function, physical health, health status of the children and family function were significantly related to the children's physical activity level. CONCLUSION Promoting parents' awareness and schools' staff about importance of physical activities especially in recess times must be an important part of school and community mental health promotion programs.
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Affiliation(s)
- Abdolreza Shaghaghi
- Department of Health Education & Promotion, Faculty of Health, Tabriz University of Medical Sciences Tabriz 14711, Iran
| | - Massumeh Piri
- Department of Health Education & Promotion, Faculty of Health, Tabriz University of Medical Sciences Tabriz 14711, Iran
| | - Hamid Allahverdipour
- Department of Health Education & Promotion, Faculty of Health, Tabriz University of Medical Sciences Tabriz 14711, Iran ; Clinical Psychiatry Research Center, Tabriz University of Medical Sciences, Tabriz 46184 , Iran
| | - Mohammad Asghari-Jafarabadi
- Traffic Injury Prevention Research Center, Faculty of Health, Tabriz University of Medical Sciences, Tabriz 14711, Iran
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24353
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Meng Z, Bao X, Zhang M, Wei S, Chang W, Li J, Chen L, Nyomba BLG. Alteration of 11β-hydroxysteroid dehydrogenase type 1 and glucocorticoid receptor by ethanol in rat liver and mouse hepatoma cells. J Diabetes Res 2013; 2013:218102. [PMID: 23819126 PMCID: PMC3683472 DOI: 10.1155/2013/218102] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 05/07/2013] [Indexed: 12/27/2022] Open
Abstract
Alcohol is a potential risk factor of type 2 diabetes, but its underlying mechanism is unclear. To explore this issue, Wistar rats and mouse hepatoma cells (Hepa 1-6) were exposed to ethanol, 8 g·kg(-1) ·d(-1) for 3 months and 100 mM for 48 h, respectively. Glucose and insulin tolerance tests in vivo were performed, and protein levels of 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) and glucocorticoid receptor (GR) in liver and Hepa 1-6 cells were measured. Alterations of key enzymes of gluconeogenesis phosphoenolpyruvate carboxykinase (PEPCK) and glucose 6 phosphatase (G6Pase), as well as glycogen synthase kinase 3a (GSK3 α ), were also examined. The results revealed that glucose levels were increased, and insulin sensitivity was impaired accompanied with liver injury in rats exposed to ethanol compared with controls. The 11β-HSD1, GR, PEPCK, G6Pase, and GSK3 α proteins were increased in the liver of rats treated with ethanol compared with controls. Ethanol-exposed Hepa 1-6 cells also showed higher expression of 11β-HSD1, GR, PEPCK, G6Pase, and GSK3 α proteins than control cells. After treatment of Hepa 1-6 cells exposed to ethanol with the GR inhibitor RU486, the expression of 11β-HSD1 and GR was significantly decreased. At the same time the increases in PEPCK, G6Pase, and GSK3 α levels induced by ethanol in Hepa 1-6 cells were also attenuated by RU486. The results indicate that ethanol causes glucose intolerance by increasing hepatic expression of 11β-HSD1 and GR, which leads to increased expression of gluconeogenic and glycogenolytic enzymes.
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Affiliation(s)
- Zhaojie Meng
- Department of Pharmacology, School of Norman Bethune Medical Sciences, Jilin University, Changchun, Jilin 130021, China
| | - Xueying Bao
- The 208th Hospital of the Chinese People's Liberation Amry, Changchun, Jilin 130062, China
| | - Ming Zhang
- Department of Pharmacology, School of Norman Bethune Medical Sciences, Jilin University, Changchun, Jilin 130021, China
| | - Shengnan Wei
- Department of Pharmacology, School of Norman Bethune Medical Sciences, Jilin University, Changchun, Jilin 130021, China
| | - Wenguang Chang
- Department of Pharmacology, School of Norman Bethune Medical Sciences, Jilin University, Changchun, Jilin 130021, China
| | - Jing Li
- Department of Pharmacology, School of Norman Bethune Medical Sciences, Jilin University, Changchun, Jilin 130021, China
- *Jing Li:
| | - Li Chen
- Department of Pharmacology, School of Norman Bethune Medical Sciences, Jilin University, Changchun, Jilin 130021, China
| | - B. L. Grégoire Nyomba
- Department of Internal Medicine, University of Manitoba, Winnipeg, MB, Canada R3E3P4
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24354
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Wei H, Wang E. Nanomaterials with enzyme-like characteristics (nanozymes): next-generation artificial enzymes. Chem Soc Rev 2013; 42:6060-93. [DOI: 10.1039/c3cs35486e] [Citation(s) in RCA: 2267] [Impact Index Per Article: 206.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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24355
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Abstract
PURPOSE OF REVIEW Protein anabolism is abnormal in human type 2 diabetes (T2DM). We review studies of anabolic stimuli that identify potential causes. If uncorrected, and combined with aging effects, they will compromise muscle function and mass. Knowing causes can guide studies of preventive and treatment measures. RECENT FINDINGS T2DM accelerates age-related decreases in muscle mass. This could be related to insulin resistance of whole-body protein anabolism demonstrated in hyperglycemic obese men. In contrast, their protein anabolic response to hyperaminoacidemia suggested that ample amino acid administration, especially branched chain amino acids might overcome such insulin resistance. One study of chronic leucine supplementation in elderly T2DM patients did not increase muscle mass. However, they lacked sarcopenia and had adequate dietary protein intake, so may be atypical. Exercise induced similar increases in muscle protein synthesis, mass and strength in healthy and T2DM patients suggesting that physical activity might also overcome insulin resistance of protein anabolism. SUMMARY Muscle protein anabolism in T2DM is resistant to the action of insulin but perhaps not to amino acid supply or exercise. Whether leucine supplementation improves muscle mass and function in persons with T2DM (especially elderly) with reduced protein intake or muscle mass needs to be determined.
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Affiliation(s)
- Maya S Bassil
- School of Arts and Sciences, Natural Science Division, Lebanese American University, Beirut, Lebanon
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24356
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Abstract
Beta cell dysfunction and insulin resistance are inherently complex with their interrelation for triggering the pathogenesis of diabetes also somewhat undefined. Both pathogenic states induce hyperglycemia and therefore increase insulin demand. Beta cell dysfunction results from inadequate glucose sensing to stimulate insulin secretion therefore elevated glucose concentrations prevail. Persistently elevated glucose concentrations above the physiological range result in the manifestation of hyperglycemia. With systemic insulin resistance, insulin signaling within glucose recipient tissues is defective therefore hyperglycemia perseveres. Beta cell dysfunction supersedes insulin resistance in inducing diabetes. Both pathological states influence each other and presumably synergistically exacerbate diabetes. Preserving beta cell function and insulin signaling in beta cells and insulin signaling in the glucose recipient tissues will maintain glucose homeostasis.
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Affiliation(s)
- Marlon E. Cerf
- Diabetes Discovery Platform, South African Medical Research CouncilCape Town, South Africa
- *Correspondence: Marlon E. Cerf, Diabetes Discovery Platform, South African Medical Research Council, PO Box 19070, Tygerberg, Cape Town 7505, South Africa. e-mail:
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24357
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Penque BA, Tackett L, Elmendorf JS. Trivalent Chromium Modulates Hexosamine Biosynthesis Pathway Transcriptional Activation of Cholesterol Synthesis and Insulin Resistance. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/ojemd.2013.34a1001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24358
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Papanas N, Zissimopoulos A, Maltezos E. (18)F-FDG PET and PET/CT for the diagnosis of diabetic foot osteomyelitis. Hippokratia 2013; 17:4-6. [PMID: 23935335 PMCID: PMC3738276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Affiliation(s)
- N Papanas
- Outpatient Clinic of the Diabetic Foot, 2 Department of Internal Medicine
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24359
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Shehzad A, Lee YS. Molecular mechanisms of curcumin action: signal transduction. Biofactors 2013; 39:27-36. [PMID: 23303697 DOI: 10.1002/biof.1065] [Citation(s) in RCA: 166] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Accepted: 10/10/2012] [Indexed: 02/06/2023]
Abstract
Chemoprevention represents one of the most highly effective anti-cancer strategies and is accompanied by minimal secondary effects as compared to conventional chemotherapies. Many new anti-inflammatory and anti-cancer drug candidates have been derived from chemical scaffolds engineered from natural products discovered just a few decades ago. This approach is widely utilized in drug discovery in order to produce novel molecular entities with enhanced drug activities mediated through various signal transduction pathways for the treatment of different diseases. Curcumin, a polyphenolic derivative of turmeric, is a naturally occurring compound isolated from Curcuma longa that suppresses and inverts carcinogenesis via multifaceted molecular targets. Several reports have demonstrated that curcumin inhibits animal and human cancers, suggesting that it may serve as a chemopreventive agent. Numerous in vitro and in vivo experimental models have also revealed that curcumin regulates several molecules in cell signal transduction pathway including NF-κB, Akt, MAPK, p53, Nrf2, Notch-1, JAK/STAT, β-catenin, and AMPK. Modulation of cell signaling pathways through the pleiotropic effects of curcumin likely activate cell death signals and induce apoptosis in cancer cells, thereby inhibiting the progression of disease. This article provides insights into the natural chemopreventive role of curcumin via cellular transduction pathways and provides an in depth assessment of its physiological activities in the management of diseases.
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Affiliation(s)
- Adeeb Shehzad
- School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu 702-701, Korea
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24360
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The predictive value of serum intercellular adhesion molecule 1 for the progression of diabetic kidney disease in type 2 diabetic patients. REV ROMANA MED LAB 2013. [DOI: 10.2478/rrlm-2013-0045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24361
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Lee BH, Pan TM. Dimerumic acid, a novel antioxidant identified from Monascus-fermented products exerts chemoprotective effects: Mini review. J Funct Foods 2013. [DOI: 10.1016/j.jff.2012.11.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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24362
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Ramírez R. Programación fetal de la hipertensión arterial del adulto: mecanismos celulares y moleculares. REVISTA COLOMBIANA DE CARDIOLOGÍA 2013. [DOI: 10.1016/s0120-5633(13)70021-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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24363
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Vujosevic S, Midena E. Retinal layers changes in human preclinical and early clinical diabetic retinopathy support early retinal neuronal and Müller cells alterations. J Diabetes Res 2013; 2013:905058. [PMID: 23841106 PMCID: PMC3694491 DOI: 10.1155/2013/905058] [Citation(s) in RCA: 156] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 05/17/2013] [Accepted: 05/20/2013] [Indexed: 11/17/2022] Open
Abstract
PURPOSE To evaluate the changes in thickness of individual inner and outer macular and peripapillary retinal layers in diabetes. METHODS 124 subjects (124 eyes) were enrolled: 74 diabetics and 50 controls. Macular edema, proliferative diabetic retinopathy (DR), any intraocular treatment and refractive error >6 diopters were the main exclusion criteria. Full ophthalmic examination, stereoscopic fundus photography, and spectral domain-OCT were performed. After automatic retinal segmentation (layering) in 5 layers, the thickness of each layer was calculated, and values compared among groups. RESULTS Thirty patients had no DR, 44 patients had non proliferative DR. A significant increase of inner plexiform and nuclear layers was found in DR eyes versus controls (P < 0.001). A significant decrease (P < 0.01) of retinal nerve fiber layer (RNFL) and at specific sites of retinal ganglion cell layer (P = 0.02) was documented in the macula. In the peripapillary area there were no differences between diabetics and controls. CONCLUSIONS Decreased RNFL thickness and increased INL/OPL thickness in diabetics without DR or with initial DR suggest early alterations in the inner retina. On the contrary, the outer retina seems not to be affected at early stages of DM. Automatic intraretinal layering by SD-OCT may be a useful tool to diagnose and monitor early intraretinal changes in DR.
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Affiliation(s)
- Stela Vujosevic
- Department of Ophthalmology, University of Padova, Via Giustiniani 2, 35128 Padova, Italy
| | - Edoardo Midena
- Department of Ophthalmology, University of Padova, Via Giustiniani 2, 35128 Padova, Italy
- Fondazione G. B. Bietti, Via Livenza 3, 00198 Roma, Italy
- *Edoardo Midena:
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24364
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Saito FH, Damasceno DC, Dallaqua B, Linhares IM, Rudge MVC, De Mattos Paranhos Calderon I, Witkin SS. Heat shock protein production and immunity and altered fetal development in diabetic pregnant rats. Cell Stress Chaperones 2013; 18:25-33. [PMID: 22821472 PMCID: PMC3508127 DOI: 10.1007/s12192-012-0353-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Revised: 07/05/2012] [Accepted: 07/09/2012] [Indexed: 12/21/2022] Open
Abstract
We evaluated associations between the concentrations of heat shock proteins (hsp60 and hsp70) and their respective antibodies, alterations in maternal reproductive performance, and fetal malformations in pregnant rats with hyperglycemia. Mild diabetes (MD) or severe diabetes (SD) was induced in Sprague-Dawley rats prior to mating; non-treated non-diabetic rats (ND) served as controls. On day 21 of pregnancy, maternal blood was analyzed for hsp60 and hsp70 and their antibodies; and fetuses were weighed and analyzed for congenital malformations. Hsp and anti-hsp levels were correlated with blood glucose levels during gestation. There was a positive correlation between hsp60 and hsp70 levels and the total number of malformations (R = 0.5908, P = 0.0024; R = 0.4877, P = 0.0134, respectively) and the number of malformations per fetus (R = 0.6103, P = 0.0015; R = 0.4875, P = 0.0134, respectively). The anti-hsp60 IgG concentration was correlated with the number of malformations per fetus (R = 0.3887, P = 0.0451) and the anti-hsp70 IgG level correlated with the total number of malformations (R = 0.3999, P = 0.0387). Moreover, both hsp and anti-hsp antibodies showed negative correlations with fetal weight. The results suggest that there is a relationship between hsp60 and hsp70 levels and their respective antibodies and alterations in maternal reproductive performance and impaired fetal development and growth in pregnancies associated with diabetes.
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Affiliation(s)
- Felipe Hiroshi Saito
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, UNESP—Universidade Estadual Paulista, Botucatu Medical School, Sao Paulo, Brazil
| | - Débora Cristina Damasceno
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, UNESP—Universidade Estadual Paulista, Botucatu Medical School, Sao Paulo, Brazil
| | - Bruna Dallaqua
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, UNESP—Universidade Estadual Paulista, Botucatu Medical School, Sao Paulo, Brazil
| | - Iara Moreno Linhares
- Department of Gynecology, University of Sao Paulo Medical School and Hospital das Clínicas, Sao Paulo, Brazil
| | - Marilza Vieira Cunha Rudge
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, UNESP—Universidade Estadual Paulista, Botucatu Medical School, Sao Paulo, Brazil
| | - Iracema De Mattos Paranhos Calderon
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, UNESP—Universidade Estadual Paulista, Botucatu Medical School, Sao Paulo, Brazil
| | - Steven S. Witkin
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, UNESP—Universidade Estadual Paulista, Botucatu Medical School, Sao Paulo, Brazil
- Division of Immunology and Infectious Diseases, Department of Obstetrics and Gynecology, Weill Cornell Medical College, New York, NY USA
- Department of Obstetrics and Gynecology, Weill Cornell Medical College, 525 East 68th Street, Box 35, New York, NY 10065 USA
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24365
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Abstract
Adverse environments during the fetal and neonatal development period may permanently program physiology and metabolism, and lead to increased risk of diseases in later life. Programming of the hypothalamic-pituitary-adrenal (HPA) axis is one of the key mechanisms that contribute to altered metabolism and response to stress. Programming of the HPA axis often involves epigenetic modification of the glucocorticoid receptor (GR) gene promoter, which influences tissue-specific GR expression patterns and response to stimuli. This review summarizes the current state of research on the HPA axis and programming of health and disease in the adult, focusing on the epigenetic regulation of GR gene expression patterns in response to fetal and neonatal stress. Aberrant GR gene expression patterns in the developing brain may have a significant negative impact on protection of the immature brain against hypoxic-ischemic encephalopathy in the critical period of development during and immediately after birth.
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24366
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Abstract
Maintenance of a balanced redox state within the cell is of critical importance to a wide variety of biological systems. Nuclear factor erythroid-derived 2-like 2 (Nrf2) is a critical regulator of key aspects of the antioxidant defense pathway and has long been a subject of interest regarding conditions of chronic stress such as inflammation and cancer. Recent data have emerged demonstrating that oxidative stress and Nrf2 also play critical roles in the biology of adipose tissue. This review examines data identifying the roles of Nrf2 and oxidative stress in the biological process of adipose cell differentiation as well as the implications of Nrf2 modulation on obesity. Working to understand the complex interplay among Nrf2, oxidative stress, and adipose biology could lead to a variety of possible treatments for obesity and other related disorders.
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Affiliation(s)
- Kevin S. Schneider
- Department of Laboratory Medicine and Pathology, University of California, Irvine, CA
| | - Jefferson Y. Chan
- Department of Laboratory Medicine and Pathology, University of California, Irvine, CA
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24367
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Age-related distributions of nine fasting plasma free fatty acids in a population of Chinese adults. Clin Chim Acta 2013; 415:81-7. [DOI: 10.1016/j.cca.2012.10.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Revised: 09/29/2012] [Accepted: 10/01/2012] [Indexed: 11/23/2022]
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24368
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Abstract
Nonalcoholic fatty liver disease (NAFLD), the most common liver disorder worldwide, encompasses a spectrum of abnormal liver histology ranging from simple steatosis to nonalcoholic steatohepatitis (NASH) and cirrhosis. Population studies show that NAFLD is strongly associated with insulin resistance, obesity, type 2 diabetes mellitus, and lipid abnormalities. In the context of hepatic steatosis, factors that promote cell injury, inflammation, and fibrosis include oxidative stress, early mitochondrial dysfunction, endoplasmic reticulum stress, iron accumulation, apoptosis, adipocytokines, and stellate cell activation. The exact NASH prevalence is unknown because of the absence of simple noninvasive diagnostic tests. Although liver biopsy is the "gold standard" for the diagnosis of NASH, other tests are needed to facilitate the diagnosis and greatly reduce the requirement for invasive liver biopsy. In addition, the development of new fibrosis markers in NASH is needed to facilitate the assessment of its progression and the effectiveness of new therapies. The aim of this chapter, which is overview of biomarkers in NASH, is to establish a systematic approach to laboratory findings of the disease.
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24369
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Jobs E, Risérus U, Ingelsson E, Sundström J, Jobs M, Nerpin E, Iggman D, Basu S, Larsson A, Lind L, Ärnlöv J. Serum cathepsin S is associated with decreased insulin sensitivity and the development of type 2 diabetes in a community-based cohort of elderly men. Diabetes Care 2013; 36:163-5. [PMID: 22923671 PMCID: PMC3526243 DOI: 10.2337/dc12-0494] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE To investigate associations between serum cathepsin S, impaired insulin sensitivity, defective insulin secretion, and diabetes risk in a community-based sample of elderly men without diabetes. RESEARCH DESIGN AND METHODS Serum cathepsin S, insulin sensitivity (euglycemic-hyperinsulinemic clamp), and insulin secretion (early insulin response during an oral glucose tolerance test) were measured in 905 participants of the Uppsala Longitudinal Study of Adult Men (mean age, 71 years). Thirty participants developed diabetes during 6 years of follow-up. RESULTS After adjustment for age, anthropometric variables, and inflammatory markers, higher cathepsin S was associated with decreased insulin sensitivity (regression coefficient per SD increase -0.09 [95% CI -0.14 to -0.04], P = 0.001), but no association with early insulin response was found. Moreover, higher cathepsin S was associated with a higher risk for developing diabetes (odds ratio per SD increase 1.48 [1.08-2.01], P = 0.01). CONCLUSIONS Cathepsin S activity appears to be involved in the early dysregulation of glucose and insulin metabolism.
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Affiliation(s)
- Elisabeth Jobs
- Department of Public Health and Caring Sciences, Section of Geriatrics, Uppsala University, Uppsala, Sweden
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24370
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Migliaccio S, Francomano D, Bruzziches R, Greco EA, Fornari R, Donini LM, Lenzi A, Aversa A. Trunk fat negatively influences skeletal and testicular functions in obese men: clinical implications for the aging male. Int J Endocrinol 2013; 2013:182753. [PMID: 24348553 PMCID: PMC3854658 DOI: 10.1155/2013/182753] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 09/13/2013] [Indexed: 12/20/2022] Open
Abstract
Osteocalcin (OSCA) seems to act as a negative regulator of energy metabolism and insulin sensitivity. Evidence from male rodents suggests that OSCA may also regulate testosterone (T) synthesis. Using a cross-sectional design, we evaluated OSCA, 25(OH) vitamin D, T, 17 β -estradiol (E2), homeostasis model assessment of insulin resistance (HOMA-IR), and body composition in 86 obese (mean BMI = 34) male subjects (18-69 yr old). Independently from BMI, an inverse relationship between trunk fat percentage and plasma T (r (2) = -0.26, P < 0.01) and between HOMA-IR and OSCA levels (r (2) = -0.22, P < 0.005) was found. OSCA levels, as well as vitamin D, decreased significantly for higher BMI with significant differences above 35 (P < 0.01). A direct correlation between T and bone mineral density at lumbar (BMDL) and neck (BMDH) (P < 0.001, r (2) = -0.20; P < 0.001, r (2) = -0.24) was found, independently from age. An inverse correlation between E2 levels, BMDL, and BMDH (P < 0.001, r (2) = -0.20; P < 0.001, r (2) = -0.19) was observed. These data provide new evidences that a relationship between trunk fat mass, insulin sensitivity, OSCA and T synthesis occurs. This new relationship with skeletal health has relevant implications for the aging male, suggesting OSCA as a novel marker of metabolic and gonadal health status.
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Affiliation(s)
- Silvia Migliaccio
- Department of Movement, Human and Health Sciences, Unit of Endocrinology, University of Rome “Foro Italico”, Largo Lauro De Bosis 15, 00195 Rome, Italy
- *Silvia Migliaccio:
| | - Davide Francomano
- Department of Experimental Medicine, Medical Pathophysiology, Food and Science and Endocrinology Section, “Sapienza” University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
| | - Roberto Bruzziches
- Department of Experimental Medicine, Medical Pathophysiology, Food and Science and Endocrinology Section, “Sapienza” University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
| | - Emanuela A. Greco
- Department of Experimental Medicine, Medical Pathophysiology, Food and Science and Endocrinology Section, “Sapienza” University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
| | - Rachele Fornari
- Department of Experimental Medicine, Medical Pathophysiology, Food and Science and Endocrinology Section, “Sapienza” University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
| | - Lorenzo M. Donini
- Department of Experimental Medicine, Medical Pathophysiology, Food and Science and Endocrinology Section, “Sapienza” University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
| | - Andrea Lenzi
- Department of Experimental Medicine, Medical Pathophysiology, Food and Science and Endocrinology Section, “Sapienza” University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
| | - Antonio Aversa
- Department of Experimental Medicine, Medical Pathophysiology, Food and Science and Endocrinology Section, “Sapienza” University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
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24371
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Shishodia S. Molecular mechanisms of curcumin action: gene expression. Biofactors 2013; 39:37-55. [PMID: 22996381 DOI: 10.1002/biof.1041] [Citation(s) in RCA: 164] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Accepted: 08/07/2012] [Indexed: 12/26/2022]
Abstract
Curcumin derived from the tropical plant Curcuma longa has a long history of use as a dietary agent, food preservative, and in traditional Asian medicine. It has been used for centuries to treat biliary disorders, anorexia, cough, diabetic wounds, hepatic disorders, rheumatism, and sinusitis. The preventive and therapeutic properties of curcumin are associated with its antioxidant, anti-inflammatory, and anticancer properties. Extensive research over several decades has attempted to identify the molecular mechanisms of curcumin action. Curcumin modulates numerous molecular targets by altering their gene expression, signaling pathways, or through direct interaction. Curcumin regulates the expression of inflammatory cytokines (e.g., TNF, IL-1), growth factors (e.g., VEGF, EGF, FGF), growth factor receptors (e.g., EGFR, HER-2, AR), enzymes (e.g., COX-2, LOX, MMP9, MAPK, mTOR, Akt), adhesion molecules (e.g., ELAM-1, ICAM-1, VCAM-1), apoptosis related proteins (e.g., Bcl-2, caspases, DR, Fas), and cell cycle proteins (e.g., cyclin D1). Curcumin modulates the activity of several transcription factors (e.g., NF-κB, AP-1, STAT) and their signaling pathways. Based on its ability to affect multiple targets, curcumin has the potential for the prevention and treatment of various diseases including cancers, arthritis, allergies, atherosclerosis, aging, neurodegenerative disease, hepatic disorders, obesity, diabetes, psoriasis, and autoimmune diseases. This review summarizes the molecular mechanisms of modulation of gene expression by curcumin.
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Affiliation(s)
- Shishir Shishodia
- Department of Biology, Texas Southern University, Houston, TX 77004, USA.
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Zingg JM, Hasan ST, Meydani M. Molecular mechanisms of hypolipidemic effects of curcumin. Biofactors 2013; 39:101-21. [PMID: 23339042 DOI: 10.1002/biof.1072] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 10/19/2012] [Indexed: 12/14/2022]
Abstract
Recent evidence suggests potential benefits from phytochemicals and micronutrients in reducing the elevated oxidative and lipid-mediated stress associated with inflammation, obesity, and atherosclerosis. These compounds may either directly scavenge reactive oxygen or nitrogen species or they may modulate the activity of signal transduction enzymes leading to changes in the expression of antioxidant genes. Alternatively, they may reduce plasma lipid levels by modulating lipid metabolic genes in tissues and thus reduce indirectly lipid-mediated oxidative and endoplasmic reticulum stress through their hypolipidemic effect. Here we review the proposed molecular mechanisms by which curcumin, a polyphenol present in the rhizomes of turmeric (Curcuma longa) spice, influences oxidative and lipid-mediated stress in the vascular system. At the molecular level, mounting experimental evidence suggests that curcumin may act chemically as scavenger of free radicals and/or influences signal transduction (e.g., Akt, AMPK) and modulates the activity of specific transcription factors (e.g., FOXO1/3a, NRF2, SREBP1/2, CREB, CREBH, PPARγ, and LXRα) that regulate the expression of genes involved in free radicals scavenging (e.g., catalase, MnSOD, and heme oxygenase-1) and lipid homeostasis (e.g., aP2/FABP4, CD36, HMG-CoA reductase, and carnitine palmitoyltransferase-I (CPT-1)). At the cellular level, curcumin may induce a mild oxidative and lipid-metabolic stress leading to an adaptive cellular stress response by hormetic stimulation of these cellular antioxidant defense systems and lipid metabolic enzymes. The resulting lower oxidative and lipid-mediated stress may not only explain the beneficial effects of curcumin on inflammation, cardiovascular, and neurodegenerative disease, but may also contribute to the increase in maximum life-span observed in animal models.
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Affiliation(s)
- Jean-Marc Zingg
- Vascular Biology Laboratory, Jean Mayer USDA-Human Nutrition Research Center on Aging, Tufts University, Boston, MA 02111, USA.
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24373
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Cui R, Sheng H, Rui XF, Cheng XY, Sheng CJ, Wang JY, Qu S. Low bone mineral density in chinese adults with nonalcoholic Fatty liver disease. Int J Endocrinol 2013; 2013:396545. [PMID: 23983685 PMCID: PMC3747470 DOI: 10.1155/2013/396545] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 07/03/2013] [Accepted: 07/08/2013] [Indexed: 12/13/2022] Open
Abstract
Aim. To investigate bone metabolic characteristics in Chinese adults with nonalcoholic fatty liver disease (NAFLD). Methods. A total of 224 patients (99 males and 125 postmenopausal females) were recruited and divided into 4 groups: males without NAFLD, males with NAFLD, females without NAFLD, and females with NAFLD. Bone mineral density (BMD) was evaluated according to body mass index (BMI), waist circumference (WC), and serum biomarkers. β cell function was evaluated by HOMA2%B, HOMA2%S, and HOMA2IR. Results. Males in the NAFLD group had lower BMD of the right hip and the femoral neck (0.852 ± 0.117 versus 0.930 ± 0.123, P = 0.002; 0.736 ± 0.119 versus 0.812 ± 0.132, P = 0.004), and females had lower BMD of the right hip (0.725 ± 0.141 versus 0.805 ± 0.145, P = 0.002) even after adjusted for weight, BMI, waist, HDL, and ALT. There was no significant difference in bone metabolic markers between patients with and without NAFLD. NAFLD was an important factor that affected the bone; moreover, the effect attenuated when HOMA2IR entered into the model (R (2) = 0.160, β = -0.172, and P = 0.008). Conclusions. NAFLD exerts a detrimental effect on BMD in both males and females. Insulin resistance may play an important role in this pathophysiological process.
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Affiliation(s)
- Ran Cui
- Department of Endocrinology & Metabolism, Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Middle Yanchang Road, Shanghai 200072, China
| | - Hui Sheng
- Department of Endocrinology & Metabolism, Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Middle Yanchang Road, Shanghai 200072, China
- *Hui Sheng: and
| | - Xue-Fei Rui
- Department of Endocrinology & Metabolism, Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Middle Yanchang Road, Shanghai 200072, China
| | - Xiao-Yun Cheng
- Department of Endocrinology & Metabolism, Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Middle Yanchang Road, Shanghai 200072, China
| | - Chun-Jun Sheng
- Department of Endocrinology & Metabolism, Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Middle Yanchang Road, Shanghai 200072, China
| | - Ji-Ying Wang
- Department of Endocrinology & Metabolism, Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Middle Yanchang Road, Shanghai 200072, China
| | - Shen Qu
- Department of Endocrinology & Metabolism, Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Middle Yanchang Road, Shanghai 200072, China
- *Shen Qu:
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Abstract
Curcumin (diferuloylmethane), a yellow coloring agent extracted from turmeric is also used as a remedy for the treatment and prevention of inflammatory diseases. Acute and chronic inflammation is a major factor in the progression of obesity, type II diabetes, arthritis, pancreatitis, cardiovascular, neurodegenerative and metabolic diseases, as well as certain types of cancer. Turmeric has a long history of use in Ayurvedic medicine for the treatment of inflammatory disorders. Recent studies on the efficacy and therapeutic applicability of turmeric have suggested that the active ingredient of tumeric is curcumin. Further, compelling evidence has shown that curcumin has the ability to inhibit inflammatory cell proliferation, invasion, and angiogenesis through multiple molecular targets and mechanisms of action. Curcumin is safe, non-toxic, and mediates its anti-inflammatory effects through the down-regulation of inflammatory transcription factors, cytokines, redox status, protein kinases, and enzymes that all promote inflammation. In addition, curcumin induces apoptosis through mitochondrial and receptor-mediated pathways, as well as activation of caspase cascades. In the current study, the anti-inflammatory effects of curcumin were evaluated relative to various chronic inflammatory diseases. Based on the available pharmacological data obtained from in vitro and in vivo research, as well as clinical trials, an opportunity exists to translate curcumin into clinics for the prevention of inflammatory diseases in the near future.
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Affiliation(s)
- Adeeb Shehzad
- School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu 702-701, Korea
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24375
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Vaughan K, Peters B, Mallone R, von Herrath M, Roep BO, Sette A. Navigating diabetes-related immune epitope data: resources and tools provided by the Immune Epitope Database (IEDB). Immunome Res 2013; 9. [PMID: 25140192 PMCID: PMC4134942 DOI: 10.4172/1745-7580.1000063] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background The Immune Epitope Database (IEDB), originally focused on infectious diseases, was recently expanded to allergy, transplantation and autoimmunity diseases. Here we focus on diabetes, chosen as a prototype autoimmune disease. We utilize a combined tutorial and meta-analysis format, which demonstrates how common questions, related to diabetes epitopes can be answered. Results A total of 409 references are captured in the IEDB describing >2,500 epitopes from diabetes associated antigens. The vast majority of data were derived from GAD, insulin, IA-2/PTPRN, IGRP, ZnT8, HSP, and ICA-1, and the experiments related to T cell epitopes and MHC binding far outnumbers B cell assays. We illustrate how to search by specific antigens, epitopes or host. Other examples include searching for tetramers or epitopes restricted by specific alleles or assays of interest, or searching based on the clinical status of the host. Conclusions The inventory of all published diabetes epitope data facilitates its access for the scientific community. While the global collection of primary data from the literature reflects potential investigational biases present in the literature, the flexible search approach allows users to perform queries tailored to their preferences, including or excluding data as appropriate. Moreover, the analysis highlights knowledge gaps and identifies areas for future investigation.
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Affiliation(s)
- Kerrie Vaughan
- Vaccine Discovery, La Jolla Institute for Allergy and Immunology, La Jolla, CA
| | - Bjoern Peters
- Vaccine Discovery, La Jolla Institute for Allergy and Immunology, La Jolla, CA
| | - Roberto Mallone
- INSERM, U1016, Cochin Institute, DeAR Lab Avenir, Saint Vincent de Paul Hospital, 82 Avenue Denfert Rochereau, 75674 Paris Cedex 14, France
| | - Matthias von Herrath
- Developmental Immunology, La Jolla Institute for Allergy and Immunology, La Jolla, CA
| | - Bart O Roep
- Department for Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, Netherlands
| | - Alessandro Sette
- Vaccine Discovery, La Jolla Institute for Allergy and Immunology, La Jolla, CA
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24376
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Poolsup N, Suksomboon N, Kyaw AM. Systematic review and meta-analysis of the effectiveness of continuous glucose monitoring (CGM) on glucose control in diabetes. Diabetol Metab Syndr 2013; 5:39. [PMID: 23876067 PMCID: PMC3728077 DOI: 10.1186/1758-5996-5-39] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 07/21/2013] [Indexed: 02/03/2023] Open
Abstract
Diabetes mellitus is a chronic disease that necessitates continuing treatment and patient self-care education. Monitoring of blood glucose to near normal level without hypoglycemia becomes a challenge in the management of diabetes. Although self monitoring of blood glucose (SMBG) can provide daily monitoring of blood glucose level and help to adjust therapy, it cannot detect hypoglycemic unawareness and nocturnal hypoglycemia which occurred mostly in T1DM pediatrics. Continuous glucose monitoring (CGM) offers continuous glucose data every 5 minutes to adjust insulin therapy especially for T1DM patients and to monitor lifestyle intervention especially for T2DM patients by care providers or even patients themselves. The main objective of this study was to assess the effects of continuous glucose monitoring (CGM) on glycemic control in Type 1 diabetic pediatrics and Type 2 diabetic adults by collecting randomized controlled trials from MEDLINE (pubmed), SCOPUS, CINAHL, Web of Science and The Cochrane Library up to May 2013 and historical search through the reference lists of relevant articles. There are two types of CGM device: real-time CGM and retrospective CGM and both types of the device were included in the analysis. In T1DM pediatrics, CGM use was no more effective than SMBG in reducing HbA1c [mean difference - 0.13% (95% CI -0.38% to 0.11%,]. This effect was independent of HbA1c level at baseline. Subgroup analysis indicated that retrospective CGM was not superior to SMBG [mean difference -0.05% (95% CI -0.46% to 0.35%)]. In contrast, real-time CGM revealed better effect in lowering HbA1c level compared with SMBG [mean difference -0.18% (95% CI -0.35% to -0.02%, p = 0.02)]. In T2DM adults, significant reduction in HbA1c level was detected with CGM compared with SMBG [mean difference - 0.31% (95% CI -0.6% to -0.02%, p = 0.04)]. This systematic review and meta-analysis suggested that real-time CGM can be more effective than SMBG in T1DM pediatrics, though retrospective CGM was not. CGM provided better glycemic control in T2DM adults compared with SMBG.
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Affiliation(s)
- Nalinee Poolsup
- Department of Pharmacy, Faculty of Pharmacy, Silpakorn University, Nakhon-Pathom, Thailand
| | - Naeti Suksomboon
- Department of Pharmacy, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand
| | - Aye Mon Kyaw
- Department of Pharmacy, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand
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24377
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Hove KD, Brøns C, Færch K, Lund SS, Petersen JS, Karlsen AE, Rossing P, Rehfeld JF, Vaag A. Effects of 12 weeks' treatment with a proton pump inhibitor on insulin secretion, glucose metabolism and markers of cardiovascular risk in patients with type 2 diabetes: a randomised double-blind prospective placebo-controlled study. Diabetologia 2013; 56:22-30. [PMID: 23011351 DOI: 10.1007/s00125-012-2714-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 07/31/2012] [Indexed: 01/04/2023]
Abstract
AIMS/HYPOTHESIS Recent studies suggest that proton pump inhibitor treatment may increase insulin secretion and improve glucose metabolism in type 2 diabetes. In a randomised double-blind prospective placebo-controlled 2 × 2 factorial study, we examined the effect of esomeprazole on insulin secretion, HbA(1c) and cardiovascular risk factors in type 2 diabetes. METHODS Forty-one patients with type 2 diabetes using dietary control or oral glucose-lowering treatment were randomised to receive add-on esomeprazole 40 mg (n = 20) or placebo (n = 21) for 12 weeks. Randomisation was carried out prior to inclusion on the basis of a computer-generated random-number list. The allocation sequence was concealed in sealed envelopes from the researcher enrolling and assessing participants. The study was undertaken at Steno Diabetes Center, Gentofte, Denmark. The primary outcome was change in AUC for insulin levels during a meal test. Secondary outcomes were the levels of HbA(1c) and biochemical markers of cardiovascular risk, including lipids, coagulation factors, inflammation markers, markers of endothelial function and 24 h ambulatory BP measurements. RESULTS Forty-one participants were analysed. In the esomeprazole-treated group the AUC for insulin did not change (before vs after treatment: 28,049 ± 17,659 vs 27,270 ± 32,004 pmol/l × min (p = 0.838). In the placebo group AUC for insulin decreased from 27,392 ± 14,348 pmol/l × min to 22,938 ± 11,936 pmol/l × min (p = 0.002). Esomeprazole treatment (n = 20) caused a ninefold increase in the AUC for gastrin. HbA(1c) increased from 7.0 ± 0.6% (53 ± 5 mmol/mol) to 7.3 ± 0.8% (56 ± 6 mmol/mol) in the esomeprazole-treated group and from 7.0 ± 0.6% (53 ± 5 mmol/mol) to 7.4 ± 0.8% (57 ± 6 mmol/mol) in the placebo group (n = 21) (p for difference in change >0.05). Except for BP, there were no differences between the groups in the markers of cardiovascular risk (p > 0.05). Monitoring of 24 h ambulatory BP showed a significant decrease in daytime systolic BP, daytime diastolic BP and 24 h diastolic BP in the placebo group (p < 0.05). No change in BP was seen in the patients treated with esomeprazole. CONCLUSIONS/INTERPRETATION Treatment with esomeprazole over 12 weeks did not improve insulin secretion, glycaemic control or cardiovascular disease biomarkers in patients with type 2 diabetes.
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Affiliation(s)
- K D Hove
- Steno Diabetes Center A/S, Niels Steensens Vej 2, 2820 Gentofte, Denmark.
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24378
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Blaslov K, Bulum T, Zibar K, Duvnjak L. Relationship between Adiponectin Level, Insulin Sensitivity, and Metabolic Syndrome in Type 1 Diabetic Patients. Int J Endocrinol 2013; 2013:535906. [PMID: 23956744 PMCID: PMC3730225 DOI: 10.1155/2013/535906] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Accepted: 07/01/2013] [Indexed: 01/30/2023] Open
Abstract
Objective. Adiponectin is known to be decreased in insulin resistance (IR) and metabolic syndrome (MS) which can be present in patients with type 1 diabetes mellitus (T1DM). The aim of this study was to evaluate the relationship between adiponectin level, MS, and insulin sensitivity in T1DM. Research Design and Methods. The study included 77 T1DM patients divided into two groups based on the total plasma adiponectin median value. Insulin sensitivity was calculated with the equation for eGDR, and MS was defined according to International Diabetes Federation criteria. Results. Patients with higher adiponectin level (n = 39) had significantly lower waist circumference (P < 0.002), fasting venous glucose levels (P < 0.001), higher HDL3-cholesterol (P = 0.011), and eGDR (P = 0.003) in comparison to the group with lower adiponectin who showed higher prevalence of MS (P = 0.045). eGDR increased for 1.09 mg/kg(-1) min(-1) by each increase of 1 µ g/mL total fasting plasma adiponectin (P = 0.003). In the logistic regression model, adiponectin was inversely associated with the presence of MS (P = 0.014). Conclusion. Higher adiponectin concentration is associated with lower prevalence of MS in T1DM. Whether higher adiponectin concentration has a protective role in the development of the MS in T1DM needs to be clarified in future follow-up studies.
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Affiliation(s)
- Kristina Blaslov
- Vuk Vrhovac Clinic for Diabetes, Endocrinology and Metabolic Diseases, University Hospital Merkur, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - Tomislav Bulum
- Vuk Vrhovac Clinic for Diabetes, Endocrinology and Metabolic Diseases, University Hospital Merkur, School of Medicine, University of Zagreb, Zagreb, Croatia
- *Tomislav Bulum:
| | - Karin Zibar
- Vuk Vrhovac Clinic for Diabetes, Endocrinology and Metabolic Diseases, University Hospital Merkur, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - Lea Duvnjak
- Vuk Vrhovac Clinic for Diabetes, Endocrinology and Metabolic Diseases, University Hospital Merkur, School of Medicine, University of Zagreb, Zagreb, Croatia
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24379
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Wang L, Guo L, Zhang L, Zhou Y, He Q, Zhang Z, Wang M. Effects of glucose load and nateglinide intervention on endothelial function and oxidative stress. J Diabetes Res 2013; 2013:849295. [PMID: 23691521 PMCID: PMC3647564 DOI: 10.1155/2013/849295] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Revised: 02/17/2013] [Accepted: 02/18/2013] [Indexed: 11/18/2022] Open
Abstract
We analysed endothelial function and oxidative stress in patients with abnormal glucose metabolism, the effect of glucose load, and the impact of nateglinide. 109 participants were grouped into newly diagnosed diabetes, prediabetes, and control. Fasting plasma glucose (FPG), postprandial plasma glucose (PPG), glycosylated haemoglobin (HbA1c), and glycated albumin (GA) varied significantly among the study groups (P < 0.01). Nitric oxide (NO) and insulin resistance index (HOMA-IRI) levels were markedly different between the newly diagnosed diabetes and the control (P < 0.01). Glucose loading lowered flow-mediated endothelium-dependent dilation (FMEDD), NO, and superoxide dismutase (SOD) (P < 0.01). Fasting and glucose loading FMEDD, FPG, PPG, HbA1c, and GA were negatively correlated (r = -0.4573, -0.4602, -0.3895, -0.3897, and r = -0.4594, -0.4803, -0.4494, -0.3885; P < 0.01), whereas NO, SOD, and HOMA- β were positively correlated (r = 0.2983, 0.3211, 0.311, and r = 0.1954, 0.361, 0.2569; P < 0.05). After the treatment with nateglinide, significant decreases in FPG, PPG, GA, HbA1C, endothelin-1(ET-1), malondialdehyde (MDA), and HOMA-IRI were observed, whereas FMEDD, NO, and SOD increased (P < 0.01). Thus, the study demonstrated the adverse effect of glucose load on endothelial function and oxidative stress. Nateglinide lowers blood glucose, reduces insulin resistance and oxidative stress, and improves endothelial function in newly diagnosed diabetes.
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Affiliation(s)
- Leilei Wang
- VIP Department, Beijing Hospital of the Ministry of Health, Dongdan Dahua, Road Number One, Beijing 100730, China
| | - Lixin Guo
- Endocrinology and Metabolism Department, Beijing Hospital of the Ministry of Health, Dongdan Dahua, Road Number One, Beijing 100730, China
- *Lixin Guo:
| | - Lina Zhang
- Endocrinology and Metabolism Department, Beijing Hospital of the Ministry of Health, Dongdan Dahua, Road Number One, Beijing 100730, China
| | - Yan Zhou
- Endocrinology and Metabolism Department, Beijing Hospital of the Ministry of Health, Dongdan Dahua, Road Number One, Beijing 100730, China
| | - Qinghua He
- Endocrinology and Metabolism Department, Beijing Hospital of the Ministry of Health, Dongdan Dahua, Road Number One, Beijing 100730, China
| | - Zheng Zhang
- Ultrasound Division, Beijing Hospital of the Ministry of Health, Dongdan Dahua, Road Number One, Beijing 100730, China
| | - Meng Wang
- Laboratory Division, Beijing Hospital of the Ministry of Health, Dongdan Dahua, Road Number One, Beijing 100730, China
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24380
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Goktas Z, Moustaid-Moussa N, Shen CL, Boylan M, Mo H, Wang S. Effects of bariatric surgery on adipokine-induced inflammation and insulin resistance. Front Endocrinol (Lausanne) 2013; 4:69. [PMID: 23772224 PMCID: PMC3677351 DOI: 10.3389/fendo.2013.00069] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 05/23/2013] [Indexed: 12/31/2022] Open
Abstract
Over a third of the US population is obese and at high risk for developing type 2 diabetes, insulin resistance, and other metabolic disorders. Obesity is considered a chronic low-grade inflammatory condition that is primarily attributed to expansion and inflammation of adipose tissues. Indeed, adipocytes produce and secrete numerous proinflammatory and anti-inflammatory cytokines known as adipokines. When the balance of these adipokines is shifted toward higher production of proinflammatory factors, local inflammation within adipose tissues and subsequently systemic inflammation occur. These adipokines including leptin, visfatin, resistin, apelin, vaspin, and retinol binding protein-4 can regulate inflammatory responses and contribute to the pathogenesis of diabetes. These effects are mediated by key inflammatory signaling molecules including activated serine kinases such as c-Jun N-terminal kinase and serine kinases inhibitor κB kinase and insulin signaling molecules including insulin receptor substrates, protein kinase B (PKB, also known as Akt), and nuclear factor kappa B. Bariatric surgery can decrease body weight and improve insulin resistance in morbidly obese subjects. However, despite reports suggesting reduced inflammation and weight-independent effects of bariatric surgery on glucose metabolism, mechanisms behind such improvements are not yet well understood. This review article focuses on some of these novel adipokines and discusses their changes after bariatric surgery and their relationship to insulin resistance, fat mass, inflammation, and glucose homeostasis.
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Affiliation(s)
- Zeynep Goktas
- Nutritional Sciences Program, College of Human Science, Texas Tech University, Lubbock, TX, USA
| | - Naima Moustaid-Moussa
- Nutritional Sciences Program, College of Human Science, Texas Tech University, Lubbock, TX, USA
| | - Chwan-Li Shen
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Mallory Boylan
- Nutritional Sciences Program, College of Human Science, Texas Tech University, Lubbock, TX, USA
| | - Huanbiao Mo
- Department of Nutrition and Food Sciences, Texas Woman’s University, Denton, TX, USA
| | - Shu Wang
- Nutritional Sciences Program, College of Human Science, Texas Tech University, Lubbock, TX, USA
- *Correspondence: Shu Wang, Nutritional Science Program, College of Human Science, Texas Tech University, P.O. Box: 41240, Lubbock, TX 79409-1240, USA e-mail:
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24381
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Dean E, Gormsen Hansen R. Prescribing optimal nutrition and physical activity as "first-line" interventions for best practice management of chronic low-grade inflammation associated with osteoarthritis: evidence synthesis. ARTHRITIS 2012; 2012:560634. [PMID: 23346399 PMCID: PMC3546455 DOI: 10.1155/2012/560634] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Revised: 11/23/2012] [Accepted: 11/24/2012] [Indexed: 02/07/2023]
Abstract
Low-grade inflammation and oxidative stress underlie chronic osteoarthritis. Although best-practice guidelines for osteoarthritis emphasize self-management including weight control and exercise, the role of lifestyle behavior change to address chronic low-grade inflammation has not been a focus of first-line management. This paper synthesizes the literature that supports the idea in which the Western diet and inactivity are proinflammatory, whereas a plant-based diet and activity are anti-inflammatory, and that low-grade inflammation and oxidative stress underlying osteoarthritis often coexist with lifestyle-related risk factors and conditions. We provide evidence-informed recommendations on how lifestyle behavior change can be integrated into "first-line" osteoarthritis management through teamwork and targeted evidence-based interventions. Healthy living can be exploited to reduce inflammation, oxidative stress, and related pain and disability and improve patients' overall health. This approach aligns with evidence-based best practice and holds the promise of eliminating or reducing chronic low-grade inflammation, attenuating disease progression, reducing weight, maximizing health by minimizing a patient's risk or manifestations of other lifestyle-related conditions hallmarked by chronic low-grade inflammation, and reducing the need for medications and surgery. This approach provides an informed cost effective basis for prevention, potential reversal, and management of signs and symptoms of chronic osteoarthritis and has implications for research paradigms in osteoarthritis.
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Affiliation(s)
- Elizabeth Dean
- Department of Physical Therapy, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada V6T 1Z3
| | - Rasmus Gormsen Hansen
- Department of Physical Therapy, Ringsted and Slagelse Hospitals, Region Zealand, Denmark
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24382
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Naja F, Hwalla N, Itani L, Salem M, Azar ST, Zeidan MN, Nasreddine L. Dietary patterns and odds of Type 2 diabetes in Beirut, Lebanon: a case-control study. Nutr Metab (Lond) 2012; 9:111. [PMID: 23270372 PMCID: PMC3565896 DOI: 10.1186/1743-7075-9-111] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 12/04/2012] [Indexed: 02/06/2023] Open
Abstract
Background In Lebanon, Type 2 diabetes (T2D) has a major public health impact through high disease prevalence, significant downstream pathophysiologic effects, and enormous financial liabilities. Diet is an important environmental factor in the development and prevention of T2D. Dietary patterns may exert greater effects on health than individual foods, nutrients, or food groups. The objective of this study is to examine the association between dietary patterns and the odds of T2D among Lebanese adults. Methods Fifty-eight recently diagnosed cases of T2D and 116 population-based age, sex, and place of residence matched control participants were interviewed. Data collection included a standard socio-demographic and lifestyle questionnaire. Dietary intake was evaluated by a semi-quantitative 97-item food frequency questionnaire. Anthropometric measurements including weight, height, waist circumference, and percent body fat were also obtained. Dietary patterns were identified by factor analysis. Multivariate logistic regression analysis was used to evaluate the associations of extracted patterns with T2D. Pearson correlations between these patterns and obesity markers, energy, and nutrient intakes were also examined. Results Four dietary patterns were identified: Refined Grains & Desserts, Traditional Lebanese, Fast Food and Meat & Alcohol. While scores of the “Refined Grains & Desserts” had the highest correlations with energy (r = 0.74) and carbohydrates (r = 0.22), those of the “Fast Food” had the highest correlation with fat intake (r = 0.34). After adjustment for socio-demographic and lifestyle characteristics, scores of the Refined Grains & Desserts and Fast Food patterns were associated with higher odds of T2D (OR: 3.85, CI: 1.13-11.23 and OR: 2.80, CI: 1.14-5.59; respectively) and scores of the Traditional Lebanese pattern were inversely associated with the odds of T2D (OR: 0.46, CI: 0.22-0.97). Conclusions The findings of this study demonstrate direct associations of the Refined Grains & Desserts and Fast Food patterns with T2D and an inverse association between the Traditional Lebanese pattern and the disease among Lebanese adults. These results may guide the development of nutrition interventions for the prevention and management of T2D among Lebanese adults.
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Affiliation(s)
- Farah Naja
- Department of Nutrition and Food Sciences, Faculty of Agriculture and Food Sciences, American University of Beirut, P, O, Box 11-0236, Riad El-Solh, Beirut, 1107-2020, Lebanon.
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24383
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Alterations in basement membrane immunoreactivity of the diabetic retina in three diabetic mouse models. Graefes Arch Clin Exp Ophthalmol 2012; 251:763-75. [DOI: 10.1007/s00417-012-2237-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Revised: 11/19/2012] [Accepted: 12/03/2012] [Indexed: 10/27/2022] Open
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24384
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Bener A, Zirie MA, Kim EJ, Al Buz R, Zaza M, Al-Nufal M, Basha B, Hillhouse EW, Riboli E. Measuring burden of diseases in a rapidly developing economy: state of Qatar. Glob J Health Sci 2012; 5:134-44. [PMID: 23445701 PMCID: PMC4776792 DOI: 10.5539/gjhs.v5n2p134] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Accepted: 11/25/2012] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND The Global Burden of Disease (GBD) study has provided a conceptual and methodological framework to quantify and compare the health of populations. AIM The objective of the study was to assess the national burden of disease in the population of Qatar using the disability-adjusted life year (DALYs) as a measure of disability. METHODS We adapted the methodology described by the World Health Organization for conducting burden of disease to calculate years of life lost due to premature mortality (YLL), years lived with disability (YLD) and disability adjusted life years (DALYs). The study was conducted during the period from November 2011 to October 2012. RESULTS The study findings revealed that ischemic heart disease (11.8%) and road traffic accidents (10.3%) were the two leading causes of burden of diseases in Qatar in 2010. The burden of diseases among men (222.04) was found three times more than of women's (71.85). Of the total DALYs, 72.7% was due to non fatal health outcomes and 27.3% was due to premature death. For men, chronic diseases like ischemic heart disease (15.7%) and road traffic accidents (13.7%) accounted great burden and an important source of lost years of healthy life. For women, birth asphyxia and birth trauma (12.6%) and abortion (4.6%) were the two leading causes of disease burden. CONCLUSION The results of the study have shown that the national health priority areas should cover cardiovascular diseases, road traffic accidents and mental health. The burden of diseases among men was three times of women's.
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24385
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Ischemic conditioning protects from axoglial alterations of the optic pathway induced by experimental diabetes in rats. PLoS One 2012; 7:e51966. [PMID: 23284834 PMCID: PMC3527393 DOI: 10.1371/journal.pone.0051966] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 11/09/2012] [Indexed: 11/20/2022] Open
Abstract
Diabetic retinopathy is a leading cause of blindness. Visual function disorders have been demonstrated in diabetics even before the onset of retinopathy. At early stages of experimental diabetes, axoglial alterations occur at the distal portion of the optic nerve. Although ischemic conditioning can protect neurons and synaptic terminals against ischemic damage, there is no information on its ability to protect axons. We analyzed the effect of ischemic conditioning on the early axoglial alterations in the distal portion of the optic nerve induced by experimental diabetes. Diabetes was induced in Wistar rats by an intraperitoneal injection of streptozotocin. Retinal ischemia was induced by increasing intraocular pressure to 120 mm Hg for 5 min; this maneuver started 3 days after streptozotocin injection and was weekly repeated in one eye, while the contralateral eye was submitted to a sham procedure. The application of ischemia pulses prevented a deficit in the anterograde transport from the retina to the superior colliculus, as well as an increase in astrocyte reactivity, ultraestructural myelin alterations, and altered morphology of oligodendrocyte lineage in the optic nerve distal portion at early stages of experimental diabetes. Ischemia tolerance prevented a significant decrease of retinal glutamine synthetase activity induced by diabetes. These results suggest that early vision loss in diabetes could be abated by ischemic conditioning which preserved axonal function and structure.
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24386
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Rezvanfar MA, Rezvanfar MA, Shahverdi AR, Ahmadi A, Baeeri M, Mohammadirad A, Abdollahi M. Protection of cisplatin-induced spermatotoxicity, DNA damage and chromatin abnormality by selenium nano-particles. Toxicol Appl Pharmacol 2012; 266:356-65. [PMID: 23260366 DOI: 10.1016/j.taap.2012.11.025] [Citation(s) in RCA: 126] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Revised: 11/01/2012] [Accepted: 11/26/2012] [Indexed: 12/28/2022]
Abstract
Cisplatin (CIS), an anticancer alkylating agent, induces DNA adducts and effectively cross links the DNA strands and so affects spermatozoa as a male reproductive toxicant. The present study investigated the cellular/biochemical mechanisms underlying possible protective effect of selenium nano-particles (Nano-Se) as an established strong antioxidant with more bioavailability and less toxicity, on reproductive toxicity of CIS by assessment of sperm characteristics, sperm DNA integrity, chromatin quality and spermatogenic disorders. To determine the role of oxidative stress (OS) in the pathogenesis of CIS gonadotoxicity, the level of lipid peroxidation (LPO), antioxidant enzymes including superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) and peroxynitrite (ONOO) as a marker of nitrosative stress (NS) and testosterone (T) concentration as a biomarker of testicular function were measured in the blood and testes. Thirty-two male Wistar rats were equally divided into four groups. A single IP dose of CIS (7 mg/kg) and protective dose of Nano-Se (2 mg/kg/day) were administered alone or in combination. The CIS-exposed rats showed a significant increase in testicular and serum LPO and ONOO level, along with a significant decrease in enzymatic antioxidants levels, diminished serum T concentration and abnormal histologic findings with impaired sperm quality associated with increased DNA damage and decreased chromatin quality. Coadministration of Nano-Se significantly improved the serum T, sperm quality, and spermatogenesis and reduced CIS-induced free radical toxic stress and spermatic DNA damage. In conclusion, the current study demonstrated that Nano-Se may be useful to prevent CIS-induced gonadotoxicity through its antioxidant potential.
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Affiliation(s)
- Mohammad Amin Rezvanfar
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
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24387
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Wan X, Gupta S, Zago MP, Davidson MM, Dousset P, Amoroso A, Garg NJ. Defects of mtDNA replication impaired mitochondrial biogenesis during Trypanosoma cruzi infection in human cardiomyocytes and chagasic patients: the role of Nrf1/2 and antioxidant response. J Am Heart Assoc 2012; 1:e003855. [PMID: 23316324 PMCID: PMC3540675 DOI: 10.1161/jaha.112.003855] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 10/09/2012] [Indexed: 01/05/2023]
Abstract
BACKGROUND Mitochondrial dysfunction is a key determinant in chagasic cardiomyopathy development in mice; however, its relevance in human Chagas disease is not known. We determined if defects in mitochondrial biogenesis and dysregulation of peroxisome proliferator-activated receptor gamma (PPARγ) coactivator-1 (PGC-1)-regulated transcriptional pathways constitute a mechanism or mechanisms underlying mitochondrial oxidative-phosphorylation (OXPHOS) deficiency in human Chagas disease. METHODS AND RESULTS We utilized human cardiomyocytes and left-ventricular tissue from chagasic and other cardiomyopathy patients and healthy donors (n>6/group). We noted no change in citrate synthase activity, yet mRNA and/or protein levels of subunits of the respiratory complexes were significantly decreased in Trypanosoma cruzi-infected cardiomyocytes (0 to 24 hours) and chagasic hearts. We observed increased mRNA and decreased nuclear localization of PGC-1-coactivated transcription factors, yet the expression of genes for PPARγ-regulated fatty acid oxidation and nuclear respiratory factor (NRF1/2)-regulated mtDNA replication and transcription machinery was enhanced in infected cardiomyocytes and chagasic hearts. The D-loop formation was normal or higher, but mtDNA replication and mtDNA content were decreased by 83% and 40% to 65%, respectively. Subsequently, we noted that reactive oxygen species (ROS), oxidative stress, and mtDNA oxidation were significantly increased, yet NRF1/2-regulated antioxidant gene expression remained compromised in infected cardiomyocytes and chagasic hearts. CONCLUSIONS The replication of mtDNA was severely compromised, resulting in a significant loss of mtDNA and expression of OXPHOS genes in T cruzi-infected cardiomyocytes and chagasic hearts. Our data suggest increased ROS generation and selective functional incapacity of NRF2-mediated antioxidant gene expression played a role in the defects in mtDNA replication and unfitness of mtDNA for replication and gene expression in Chagas disease.
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Affiliation(s)
- Xianxiu Wan
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555-1070, USA
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24388
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Wang XL, Cui HP. Cholestyramine therapy alters bile acid metabolism in streptozotocin-induced diabetic rats. Shijie Huaren Xiaohua Zazhi 2012; 20:3575-3579. [DOI: 10.11569/wcjd.v20.i35.3575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the effect of cholestyramine therapy on bile acid metabolism in rats with type 2 diabetes.
METHODS: Type 2 diabetes was induced in Sprague-Dawley (SD) rats by feeding a high-fat diet and intraperitoneally injecting streptozotocin (30 mg/kg). The rats were then randomly divided into diabetes mellitus group (DM group) and cholestyramine treatment group (CT group), with 10 rats in each group. Rats in the DM group and CT group were fed a high-fat diet and a high-fat diet containing 2.5% cholestyramine, respectively. Ten normal male SD rats were used as controls (Con group) and fed standard rodent chow. Four weeks later, rats of each group were euthanized, and artery blood and liver samples were taken for further analysis. The mRNA levels of LXRα, FXR, SHP, CYP7A1, CYP27A1, ABCG5 and ABCG8, which are involved in bile acid metabolism, were evaluated by RT-PCR. The expression of CYP7A1 and CYP27A1 protein was detected by Western blot.
RESULTS: Compared to the Con group, rats in the DM group had increased mRNA levels of LXRα, CYP7A1, ABCG5 and ABCG8 (all P < 0.05), and reduced mRNA levels of FXR and SHP (both P < 0.05). Compared to the DM group, the CT group had increased mRNA levels of LXRα and CYP7A1 (both P < 0.05), reduced mRNA levels of FXR and RXR (both P < 0.05), and non-significantly changed expression of ABCG5 and ABCG8 mRNAs. The mRNA level of CYP27A1 showed no significant difference among each group. Western blot analysis showed that the protein expression of CYP7A1 was increased most significantly in the Con group, followed by the DM group and CT group (all P < 0.05), and that of CYP27A1 showed no significant difference among each group.
CONCLUSION: In type 2 diabetic rats, hepatic bile acid synthesis increases possibly as a result of increased expression of CYP7A1. Cholestyramine therapy further promotes the expression of CYP7A1. The increased mRNA expression of LXRα and decreased mRNA expression of FXR are related to the increased expression of CYP7A1.
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24389
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Lin WY, Pi-Sunyer FX, Liu CS, Li CI, Davidson LE, Li TC, Lin CC. Central obesity and albuminuria: both cross-sectional and longitudinal studies in Chinese. PLoS One 2012; 7:e47960. [PMID: 23251329 PMCID: PMC3520991 DOI: 10.1371/journal.pone.0047960] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2012] [Accepted: 09/19/2012] [Indexed: 11/18/2022] Open
Abstract
Background Albuminuria is recognized as a marker of vascular dysfunction. Central obesity increases the risk of cardiovascular disease. Little is known about the association between albuminuria and central obesity in Chinese. We aimed to assess the association between central obesity and prevalence and incidence of albuminuria in a middle-aged population-based cohort study. Methods This is a cross-sectional and longitudinal cohort study. A total of 2350 subjects aged ≥40 years were recruited in 2004 in Taiwan for cross-sectional analysis. Longitudinal analysis included 1432 baseline normoalbuminuria subjects with a mean 2.8 years follow-up, 67 of whom exhibited incident albuminuria. Albuminuria was defined as urinary albumin-to-creatinine ratio ≥30 mg/g creatinine. Multiple logistic regression analyses were used to evaluate the relationship between central obesity and prevalence and incidence of albuminuria after adjustment for age, gender, body mass index, blood pressure, renal function, glucose, high sensitivity c-reactive protein, smoking, betel nut chewing, alcohol drinking, and physical activity. Results At baseline, albuminuria is significantly associated with central obesity. The adjusted odds ratio of having albuminuria among subjects with central obesity was 1.73(95% confidence interval (CI): 1.04–2.85), compared to the subjects without central obesity. In multivariable models, participants with central obesity at baseline had a 112% increase in risk of incident albuminuria (adjusted incidence rate ratio (95% CI): 2.12(1.01–4.44)) compared with participants with non-central obesity. Conclusions Abdominal adiposity was independently associated with increased prevalence and incidence of albuminuria in Chinese. The mechanisms linking adiposity and albuminuria need to be addressed.
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Affiliation(s)
- Wen-Yuan Lin
- Department of Family Medicine, China Medical University Hospital, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
- Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan
| | - F. Xavier Pi-Sunyer
- New York Obesity and Nutrition Research Center, St. Luke's-Roosevelt Hospital, Columbia University–College of Physicians and Surgeons, New York, New York, United States of America
| | - Chiu-Shong Liu
- Department of Family Medicine, China Medical University Hospital, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
| | - Chia-Ing Li
- Medical Research, China Medical University Hospital, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
| | - Lance E. Davidson
- Department of Internal Medicine, University of Utah, Salt Lake City, Utah, United States of America
| | - Tsai-Chung Li
- Medical Research, China Medical University Hospital, Taichung, Taiwan
- Graduate Institute of Biostatistics, China Medical University, Taichung, Taiwan
- Institute of Health Care Administration, College of Health Science, Asia University, Taichung, Taiwan
| | - Cheng-Chieh Lin
- Department of Family Medicine, China Medical University Hospital, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
- Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan
- Institute of Health Care Administration, College of Health Science, Asia University, Taichung, Taiwan
- * E-mail:
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24390
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Impact of probiotic feeding during weaning on the serum lipid profile and plasma metabolome in infants. Br J Nutr 2012; 110:116-26. [DOI: 10.1017/s0007114512004618] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The gut microbiome interacts with the host in the metabolic response to diet, and early microbial aberrancies may be linked to the development of obesity and metabolic disorders later in life. Probiotics have been proposed to affect metabolic programming and blood lipid levels, although studies are lacking in infants. Here, we report on the lipid profile and global metabolic response following daily feeding of probiotics during weaning. A total of 179 healthy, term infants were randomised to daily intake of cereals with (n89) or without (n90) the addition ofLactobacillus paracaseissp.paracaseiF19 (LF19) 108colony-forming units per serving from 4 to 13 months of age. Weight, length and skinfold thickness were monitored. Venous blood was drawn at 5·5 and 13 months of age for analysis of the serum lipid profile. In a subsample, randomly selected from each group, GC-time-of-flight/MS was used to metabolically characterise plasma samples from thirty-seven infants. A combination of multi- and univariate analysis was applied to reveal differences related to LF19 treatment based on 228 putative metabolites, of which ninety-nine were identified or classified. We observed no effects of probiotic feeding on anthropometrics or the serum lipid profile. However, we detected significantly lower levels of palmitoleic acid (16 : 1) (P< 0·05) and significantly higher levels of putrescine (P< 0·01) in LF19-treated infants. Palmitoleic acid is a major MUFA strongly linked to visceral obesity, while putrescine is a polyamine with importance for gut integrity. Whether the observed differences will have long-term health consequences are being followed.
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24391
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Malhotra S, Bello E, Kominsky S. Diabetic foot ulcerations: biomechanics, charcot foot, and total contact cast. Semin Vasc Surg 2012; 25:66-9. [PMID: 22817854 DOI: 10.1053/j.semvascsurg.2012.05.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Diabetes is the seventh leading cause of death in the United States; approximately 6% of the US population has been diagnosed with diabetes. Fifteen percent of all people with diabetes will develop a foot ulceration, and 14% to 20% of them will require an amputation. During the past 25 years, much has been learned and written about lower extremity complications associated with diabetes. The single most significant discovery relative to diabetic foot ulceration is the role of peripheral sensory neuropathy. Once the correlation between the absence of sensation and foot breakdown was made, treatment algorithms began to develop. For the first time, the concept of biomechanics and the role of weight-bearing stress were considered when applying different treatments to the patient with a diabetic foot ulcer. Wound classification systems developed to aid the physician in treating what had been a very frustrating group of patients; those with diabetic foot ulcerations. From that, a myriad of treatments developed. In fact, the technology of wound management became a billion dollar business and, to this day, continues to present the clinician with unending options to effectively manage and heal wounds on the diabetic lower extremity.
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Affiliation(s)
- Sabina Malhotra
- Department of Podiatric Surgery, MedStar Washington Hospital Center, Washington, DC 20010, USA
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24392
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Calcaterra V, Cena H, Nakib G, Fonte M, Vandoni M, Valenti A, Biancotti V, Pelizzo G. Robotic-assisted gastroplication in a morbidly obese adolescent: early improvement in metabolic and neurohormonal parameters. Pediatr Rep 2012; 4:e36. [PMID: 23355936 PMCID: PMC3555206 DOI: 10.4081/pr.2012.e36] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Accepted: 10/22/2012] [Indexed: 01/07/2023] Open
Abstract
Bariatric surgery has to be considered in the management of severely obese adolescents when all conservative measures have been proven to be unresponsive. Short term metabolic and neurohormonal profile changes after robotic-assisted gastroplication are evaluated. The benefits and the usefulness of this surgical - reversal procedure in adolescent need to be defined. Fiveteen years old girl with body mass index 42.2 kg/m(2), hyperinsulinism, hyperandrogenism, amenorrhea, polycystic ovarian syndrome, hypertension with left ventricular hypertrophy. Gastric volume after surgical procedure reduction was 80-100 mL. One month postoperatively significant weigh loss was obtained. Insulin levels, insulin-resistance, leptin and ghrelin concentration were substantially ameliorated. We can conclude that bariatric surgery should be considered for a minority of severely obese adolescents under the supervision of a multidisciplinary pediatric team. Our experience confirmed that the gastroplication is safe, feasible and effective and furthermore is a reversible technique. The early improvement of the obesity co-morbities is allowed. The increased surgical accuracy in robotic assistance could limit postoperative complications rate in obese adolescents.
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Affiliation(s)
- Valeria Calcaterra
- Department of Internal Medicine University of Pavia and Department of Pediatrics, IRCCS Policlinico San Matteo Foundation Pavia
| | - Hellas Cena
- Department of Public Health, Neurosciences, Experimental and Forensis Medicine-Section of Human Nutrition
| | - Ghassan Nakib
- Department of Pediatric Surgery, IRCCS Policlinico San Matteo Foundation and University of Pavia
| | - Marialuisa Fonte
- Department of Public Health, Neurosciences, Experimental and Forensis Medicine-Section of Human Nutrition
| | - Matteo Vandoni
- Department of Public Health, Neurosciences, Experimental and Forensis Medicine-School of Movement Sciences, Italy
| | - Alessandra Valenti
- Department of Public Health, Neurosciences, Experimental and Forensis Medicine-Section of Human Nutrition
| | - Veronica Biancotti
- Department of Public Health, Neurosciences, Experimental and Forensis Medicine-School of Movement Sciences, Italy
| | - Gloria Pelizzo
- Department of Pediatric Surgery, IRCCS Policlinico San Matteo Foundation and University of Pavia
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24393
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Norheim F, Gjelstad IMF, Hjorth M, Vinknes KJ, Langleite TM, Holen T, Jensen J, Dalen KT, Karlsen AS, Kielland A, Rustan AC, Drevon CA. Molecular nutrition research: the modern way of performing nutritional science. Nutrients 2012. [PMID: 23208524 PMCID: PMC3546614 DOI: 10.3390/nu4121898] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
In spite of amazing progress in food supply and nutritional science, and a striking increase in life expectancy of approximately 2.5 months per year in many countries during the previous 150 years, modern nutritional research has a great potential of still contributing to improved health for future generations, granted that the revolutions in molecular and systems technologies are applied to nutritional questions. Descriptive and mechanistic studies using state of the art epidemiology, food intake registration, genomics with single nucleotide polymorphisms (SNPs) and epigenomics, transcriptomics, proteomics, metabolomics, advanced biostatistics, imaging, calorimetry, cell biology, challenge tests (meals, exercise, etc.), and integration of all data by systems biology, will provide insight on a much higher level than today in a field we may name molecular nutrition research. To take advantage of all the new technologies scientists should develop international collaboration and gather data in large open access databases like the suggested Nutritional Phenotype database (dbNP). This collaboration will promote standardization of procedures (SOP), and provide a possibility to use collected data in future research projects. The ultimate goals of future nutritional research are to understand the detailed mechanisms of action for how nutrients/foods interact with the body and thereby enhance health and treat diet-related diseases.
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Affiliation(s)
- Frode Norheim
- Department of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, N-0317 Oslo, Norway; (F.N.); (I.M.F.G.); (M.H.); (K.J.V.); (T.M.L.); (T.H.); (K.T.D.); (A.S.K.); (A.K.)
| | - Ingrid M. F. Gjelstad
- Department of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, N-0317 Oslo, Norway; (F.N.); (I.M.F.G.); (M.H.); (K.J.V.); (T.M.L.); (T.H.); (K.T.D.); (A.S.K.); (A.K.)
| | - Marit Hjorth
- Department of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, N-0317 Oslo, Norway; (F.N.); (I.M.F.G.); (M.H.); (K.J.V.); (T.M.L.); (T.H.); (K.T.D.); (A.S.K.); (A.K.)
| | - Kathrine J. Vinknes
- Department of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, N-0317 Oslo, Norway; (F.N.); (I.M.F.G.); (M.H.); (K.J.V.); (T.M.L.); (T.H.); (K.T.D.); (A.S.K.); (A.K.)
| | - Torgrim M. Langleite
- Department of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, N-0317 Oslo, Norway; (F.N.); (I.M.F.G.); (M.H.); (K.J.V.); (T.M.L.); (T.H.); (K.T.D.); (A.S.K.); (A.K.)
| | - Torgeir Holen
- Department of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, N-0317 Oslo, Norway; (F.N.); (I.M.F.G.); (M.H.); (K.J.V.); (T.M.L.); (T.H.); (K.T.D.); (A.S.K.); (A.K.)
| | - Jørgen Jensen
- Department of Physical Performance, Norwegian School of Sport Science, P.O. Box 4014, Ullevål Stadion, N-0806 Oslo, Norway; Jorgen.
| | - Knut Tomas Dalen
- Department of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, N-0317 Oslo, Norway; (F.N.); (I.M.F.G.); (M.H.); (K.J.V.); (T.M.L.); (T.H.); (K.T.D.); (A.S.K.); (A.K.)
| | - Anette S. Karlsen
- Department of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, N-0317 Oslo, Norway; (F.N.); (I.M.F.G.); (M.H.); (K.J.V.); (T.M.L.); (T.H.); (K.T.D.); (A.S.K.); (A.K.)
| | - Anders Kielland
- Department of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, N-0317 Oslo, Norway; (F.N.); (I.M.F.G.); (M.H.); (K.J.V.); (T.M.L.); (T.H.); (K.T.D.); (A.S.K.); (A.K.)
| | - Arild C. Rustan
- Department of Pharmaceutical Biosciences, School of Pharmacy, University of Oslo, P.O. Box 1068, Blindern, N-0316 Oslo, Norway;
| | - Christian A. Drevon
- Department of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, N-0317 Oslo, Norway; (F.N.); (I.M.F.G.); (M.H.); (K.J.V.); (T.M.L.); (T.H.); (K.T.D.); (A.S.K.); (A.K.)
- Author to whom correspondence should be addressed; ; Tel.: +47-22851392; Fax: +47-22851393
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24394
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Sadashiv, Tiwari S, Paul BN, Kumar S, Chandra A, Dhananjai S, Negi MPS. Resistin gene expression in visceral adipose tissue of postmenopausal women and its association with insulin resistance. ACTA ACUST UNITED AC 2012; 8:521-8. [PMID: 22934726 DOI: 10.2217/whe.12.46] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
AIM The present study evaluates resistin mRNA expression in visceral adipose tissue (VAT) and its correlation with insulin resistance (homeostatic model assessment) in postmenopausal obese women. MATERIALS & METHODS A total of 68 (nonobese = 34 and obese = 34) age-matched (49-70 years) postmenopausal women were recruited for the study. Fasting blood samples were collected at admission and abdominal VAT were obtained during surgery for gall bladder stones or hysterectomy. Physical parameters (age, height, weight and BMI) were measured. Biochemical parameters (plasma insulin, plasma glucose and serum resistin) were estimated by enzymatic methods. The VAT resistin mRNA expression was evaluated by real-time PCR. RESULTS The relative mean (± standard deviation) VAT resistin mRNA expression in postmenopausal obese women lowered significantly by 20.4% compared with postmenopausal nonobese women (0.029 ± 0.011 vs 0.023 ± 0.013; p = 0.047). Furthermore, VAT resistin mRNA expression in postmenopausal obese women was downregulated by 0.69-fold when compared with age-matched postmenopausal nonobese women. Furthermore, the relative VAT resistin mRNA expression in postmenopausal obese women showed significant inverse association with insulin resistance (r = -0.48; p < 0.01) and serum resistin (r = -0.84; p < 0.001), while in postmenopausal nonobese women it did not show any association with both insulin resistance (r = 0.03; p > 0.05) and serum resistin (r = -0.03; p > 0.05). CONCLUSION The VAT resistin mRNA expression in postmenopausal obese women is associated to insulin resistance.
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Affiliation(s)
- Sadashiv
- Department of Physiology, CSM Medical University, Lucknow-226003, India
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24395
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Harris C. Animal Models in Epigenetic Research: Institutional Animal Care and Use Committee Considerations across the Lifespan. ILAR J 2012; 53:370-6. [DOI: 10.1093/ilar.53.3-4.370] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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24396
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Lei X, Zhang S, Bohrer A, Barbour SE, Ramanadham S. Role of calcium-independent phospholipase A(2)β in human pancreatic islet β-cell apoptosis. Am J Physiol Endocrinol Metab 2012; 303:E1386-95. [PMID: 23074238 PMCID: PMC3774083 DOI: 10.1152/ajpendo.00234.2012] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Death of β-cells due to apoptosis is an important contributor to β-cell dysfunction in both type 1 and type 2 diabetes mellitus. Previously, we described participation of the Group VIA Ca(2+)-independent phospholipase A(2) (iPLA(2)β) in apoptosis of insulinoma cells due to ER stress. To examine whether islet β-cells are similarly susceptible to ER stress and undergo iPLA(2)β-mediated apoptosis, we assessed the ER stress response in human pancreatic islets. Here, we report that the iPLA(2)β protein is expressed predominantly in the β-cells of human islets and that thapsigargin-induced ER stress promotes β-cell apoptosis, as reflected by increases in activated caspase-3 in the β-cells. Furthermore, we demonstrate that ER stress is associated with increases in islet iPLA(2)β message, protein, and activity, iPLA(2)β-dependent induction of neutral sphingomyelinase and ceramide accumulation, and subsequent loss of mitochondrial membrane potential. We also observe that basal activated caspase-3 increases with age, raising the possibility that β-cells in older human subjects have a greater susceptibility to undergo apoptotic cell death. These findings reveal for the first time expression of iPLA(2)β protein in human islet β-cells and that induction of iPLA(2)β during ER stress contributes to human islet β-cell apoptosis. We hypothesize that modulation of iPLA(2)β activity might reduce β-cell apoptosis and this would be beneficial in delaying or preventing β-cell dysfunction associated with diabetes.
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Affiliation(s)
- Xiaoyong Lei
- Dept. of Cell, Developmental, and Integrative Biology, Univ. of Alabama at Birmingham, Birmingham, AL 35294, USA
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24397
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Guglielmi C, Palermo A, Pozzilli P. Latent autoimmune diabetes in the adults (LADA) in Asia: from pathogenesis and epidemiology to therapy. Diabetes Metab Res Rev 2012; 28 Suppl 2:40-6. [PMID: 23280865 DOI: 10.1002/dmrr.2345] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Diabetes mellitus is a metabolic disorder resulting from a defect in insulin secretion, insulin action or both. An effect of this process is chronic hyperglycaemia with disorder of carbohydrate, fat and protein metabolism and with long-term complications of diabetes including retinopathy, nephropathy and neuropathy. Latent autoimmune diabetes in adults (LADA) is a type of autoimmune diabetes that resembles Type 1 diabetes (T1D), however, it shows a later onset and slower progression towards insulin necessity. Epidemiological studies suggest that LADA may account for 2-12% of all cases of diabetes in adult population. The epidemiology and phenotypic characteristics of LADA may vary between Caucasian and Asian diabetic patients as lifestyle, food habits and body mass index differ between these two populations. Data on LADA from population-based studies in Asia are sparse and only few studies have looked at it. A number of attractive therapeutic interventions may be envisaged for prevention of beta-cell loss in LADA, including hypoglycaemic and immunomodulatory agents. Because the autoimmune process in LADA seems to be slower than in childhood T1D, there is a wider window of opportunities for intervention. In deciding the best therapeutic approach, features of LADA should guide therapy including presence of other comorbidities that may influence the therapeutic choice.
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Affiliation(s)
- Chiara Guglielmi
- Department of Endocrinology and Diabetes, University Campus Bio Medico, Via Alvaro del Portillo 21, Rome, Italy
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24398
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Yehuda-Shnaidman E, Schwartz B. Mechanisms linking obesity, inflammation and altered metabolism to colon carcinogenesis. Obes Rev 2012; 13:1083-95. [PMID: 22937964 DOI: 10.1111/j.1467-789x.2012.01024.x] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Due to its prevalence, obesity is now considered a global epidemic. It is linked to increased risk of colorectal cancer, the third most common cancer and the second leading cause of death among adults in Western countries. Obese adipose tissue differs from lean adipose tissue in its immunogenic profile, body fat distribution and metabolic profile. Obese adipose tissue releases free fatty acids, adipokines and many pro-inflammatory chemokines. These factors are known to play a key role in regulating malignant transformation and cancer progression. Obese adipose tissue is infiltrated by macrophages that participate in inflammatory pathways activated within the tissue. Adipose tissue macrophages consist of two different phenotypes. M1 macrophages reside in obese adipose tissue and produce pro-inflammatory cytokines, and M2 macrophages reside in lean adipose tissue and produce anti-inflammatory cytokines, such as interleukin-10 (IL-10). The metabolic networks that confer tumour cells with their oncogenic properties, such as increased proliferation and the ability to avoid apoptosis are still not well understood. We review the interactions between adipocytes and immune cells that may alter the metabolism towards promotion of colorectal cancer.
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Affiliation(s)
- E Yehuda-Shnaidman
- Institute of Biochemistry, Food Science and Nutrition, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
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24399
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Satarug S, Moore MR. Emerging roles of cadmium and heme oxygenase in type-2 diabetes and cancer susceptibility. TOHOKU J EXP MED 2012; 228:267-88. [PMID: 23117262 DOI: 10.1620/tjem.228.267] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Many decades after an outbreak of severe cadmium poisoning, known as Itai-itai disease, cadmium continues to pose a significant threat to human health worldwide. This review provides an update on the effects of this environmental toxicant cadmium, observed in numerous populations despite modest exposure levels. In addition, it describes the current knowledge on the link between heme catabolism and glycolysis. It examines novel functions of heme oxygenase-2 (HO-2) that protect against type 2-diabetes and obesity, which have emerged from diabetic/obese phenotypes of the HO-2 knockout mouse model. Increased cancer susceptibility in type-2 diabetes has been noted in several large cohorts. This is a cause for concern, given the high prevalence of type-2 diabetes worldwide. A lifetime exposure to cadmium is associated with pre-diabetes, diabetes, and overall cancer mortality with sex-related differences in specific types of cancer. Liver and kidney are target organs for the toxic effects of cadmium. These two organs are central to the maintenance of blood glucose levels. Further, inhibition of gluconeogenesis is a known effect of heme, while cadmium has the propensity to alter heme catabolism. This raises the possibility that cadmium may mimic certain HO-2 deficiency conditions, resulting in diabetic symptoms. Intriguingly, evidence has emerged from a recent study to suggest the potential interaction and co-regulation of HO-2 with the key regulator of glycolysis: 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase 4 (PFKFB4). HO-2 could thus be critical to a metabolic switch to cancer-prone cells because the enzyme PFKFB and glycolysis are metabolic requirements for cell proliferation and resistance to apoptosis.
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Affiliation(s)
- Soisungwan Satarug
- Center for Kidney Disease Research, University of Queensland School of Medicine, Brisbane, Australia.
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24400
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Development, brain plasticity and reward: early high-fat diet exposure confers vulnerability to obesity-view from the chair. INTERNATIONAL JOURNAL OF OBESITY SUPPLEMENTS 2012; 2:S3-6. [PMID: 27152151 DOI: 10.1038/ijosup.2012.14] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The significant increase in childhood obesity has become a particular concern, and it is recognized that the programming of obesity can arise from events occurring in the peri-conception period, prenatally and/or during the early postnatal period. In particular, high intake of dietary fat by the mother has long-term effects that are worse than once thought. This symposium was designed to outline some of the important consequences of maternal high-fat feeding during gestation and lactation, as well as exposure to a high-fat diet (HFD) after weaning, on the programming of homeostatic and hedonic regulation of food intake in both rodents and nonhuman primates (NHPs). Although a consensus emerges that high-fat feeding in early development increases the risk of developing obesity and the metabolic syndrome in adulthood, there is less agreement on the mechanisms through which this risk is conferred. Epigenetic modifications in specific gene promoters within the dopaminergic reward pathways and on the histone code will be discussed. We will also examine the effects of metabolic hormones such as leptin and ghrelin to shape the early development of hypothalamic projections that are critical to control food intake; finally, the importance of placental function in increasing obesity risk in NHP fetus from HFD mothers will be debated.
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