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Metabolism: Clinical and Experimental

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https://www.readbyqxmd.com/read/28403949/racial-differences-in-circulating-levels-of-the-soluble-receptor-for-advanced-glycation-endproducts-in-middle-aged-and-older-adults
#1
Tina E Brinkley, Xiaoyan Leng, Barbara J Nicklas, Stephen B Kritchevsky, Jingzhong Ding, Dalane W Kitzman, W Gregory Hundley
BACKGROUND: Low levels of the soluble receptor for advanced glycation endproducts (sRAGE) have been implicated in a number of chronic diseases. Previous studies indicate that sRAGE levels are ~30% lower in Blacks compared to Whites. However, the reasons for these differences are unclear. PURPOSE: We aimed to identify predictors of circulating sRAGE biomarkers among Black and White adults at high cardiac risk. METHODS: Serum levels of total sRAGE, endogenous secretory RAGE (esRAGE), carboxymethyl-lysine (CML, a major RAGE ligand), and their ratios were measured in 99 Blacks and 454 Whites...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403948/association-between-early-pregnancy-vitamin-d-status-and-changes-in-serum-lipid-profiles-throughout-pregnancy
#2
Jaqueline Lepsch, Ilana Eshriqui, Dayana Rodrigues Farias, Juliana S Vaz, Amanda C Cunha Figueiredo, Amanda Rodrigues Amorim Adegboye, Alex Brito, Rana Mokhtar, Lindsay H Allen, Michael F Holick, Gilberto Kac
OBJECTIVE: To evaluate the associations between first trimester 25-hydroxyvitamin D [25(OH)D] status and changes in high-density lipoprotein cholesterol (HDL-c), low-density lipoprotein cholesterol (LDL-c), total cholesterol (TC), triglyceride (TG) concentrations, TG/HDL-c, and TC/HDL-c ratios throughout pregnancy. We hypothesized that first trimester 25(OH)D inadequacy is associated with lower concentrations of HDL-c and higher LDL-c, TC, TG, TG/HDL-c, and TC/HDL-c ratios throughout pregnancy...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403947/berberine-induced-bioactive-metabolites-of-the-gut-microbiota-improve-energy-metabolism
#3
Yan Wang, Jia-Wen Shou, Xiao-Yang Li, Zhen-Xiong Zhao, Jie Fu, Chi-Yu He, Ru Feng, Chao Ma, Bao-Ying Wen, Fang Guo, Xin-Yi Yang, Yan-Xing Han, Lu-Lu Wang, Qian Tong, Xue-Fu You, Yuan Lin, Wei-Jia Kong, Shu-Yi Si, Jian-Dong Jiang
OBJECTIVE: Berberine (BBR) clinically lowers blood lipid and glucose levels via multi-target mechanisms. One of the possible mechanisms is related to its effect on the short chain fatty acids (SCFAs) of the gut microbiota. The goal of this study is to investigate the therapeutic effect and mode of action of BBR working through SCFAs of the gut microbiota (especially, butyrate). METHODS: Gas chromatography (GC) was used to detect butyrate and other SCFAs chemically...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403946/vitamin-k-and-osteoporosis-myth-or-reality
#4
REVIEW
Andrea Palermo, Dario Tuccinardi, Luca D'Onofrio, Mikiko Watanabe, Daria Maggi, Anna Rita Maurizi, Valentina Greto, Raffaella Buzzetti, Nicola Napoli, Paolo Pozzilli, Silvia Manfrini
Vitamin K is a liposoluble vitamin. The predominant dietary form, phylloquinone or vitamin K1, is found in plants and green vegetables; whereas menaquinone, or vitamin K2, is endogenously synthesized by intestinal bacteria and includes several subtypes that differ in side chain length. Aside from its established role in blood clotting, several studies now support a critical function of vitamin K in improving bone health. Vitamin K is in fact required for osteocalcin carboxylation that in turn regulates bone mineral accretion; it seems to promote the transition of osteoblasts to osteocytes and also limits the process of osteoclastogenesis...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403945/xanthine-oxidoreductase-activity-is-correlated-with-insulin-resistance-and-subclinical-inflammation-in-young-humans
#5
Kahori Watanabe Washio, Yoshiki Kusunoki, Takayo Murase, Takashi Nakamura, Keiko Osugi, Mana Ohigashi, Tadahiko Sukenaga, Fumihiro Ochi, Toshihiro Matsuo, Tomoyuki Katsuno, Yuji Moriwaki, Tetsuya Yamamoto, Mitsuyoshi Namba, Hidenori Koyama
BACKGROUND AND AIMS: The enzyme xanthine oxidoreductase (XOR) catalyzes the formation of uric acid (UA) from hypoxanthine and xanthine, which in turn are products of purine metabolism starting from ribose-5-phosphate. Besides the synthesis of UA, basic research has suggested that XOR is involved in the regulation of reactive oxygen species, adipogenesis, and peroxisome proliferator-activated receptor-γ (PPAR-γ). XOR activity has shown to be much lower in humans than in rodents, which makes its accurate measurement difficult...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403944/shape-of-the-ogtt-glucose-curve-and-risk-of-impaired-glucose-metabolism-in-the-egir-risc-cohort
#6
Melania Manco, Giuseppe Nolfe, Zoltan Pataky, Lucilla Monti, Francesca Porcellati, Rafael Gabriel, Asimina Mitrakou, Geltrude Mingrone
OBJECTIVE: To study whether the shape of the oral glucose tolerance test (OGTT)-glucose curve is a stable trait over time; it is associated with differences in insulin sensitivity, ß-cell function and risk of impaired fasting glucose (IFG) and glucose tolerance (IGT) in the Relationship between Insulin Sensitivity and Cardiovascular Disease (RISC) cohort. METHODS: OGTT-glucose curve shape was classified as monophasic, biphasic, triphasic and anomalous in 915 individuals...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403943/plasma-metabolomics-in-adults-with-cystic-fibrosis-during-a-pulmonary-exacerbation-a-pilot-randomized-study-of-high-dose-vitamin-d3-administration
#7
RANDOMIZED CONTROLLED TRIAL
Jessica A Alvarez, Elizabeth Y Chong, Douglas I Walker, Joshua D Chandler, Ellen S Michalski, Ruth E Grossmann, Karan Uppal, Shuzhao Li, Jennifer K Frediani, Rabindra Tirouvanziam, ViLinh T Tran, Vin Tangpricha, Dean P Jones, Thomas R Ziegler
BACKGROUND: Cystic fibrosis (CF) is a chronic catabolic disease often requiring hospitalization for acute episodes of worsening pulmonary exacerbations. Limited data suggest that vitamin D may have beneficial clinical effects, but the impact of vitamin D on systemic metabolism in this setting is unknown. OBJECTIVE: We used high-resolution metabolomics (HRM) to assess the impact of baseline vitamin D status and high-dose vitamin D3 administration on systemic metabolism in adults with CF with an acute pulmonary exacerbation...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403942/mr-signal-fat-fraction-analysis-and-t2-weighted-imaging-measure-bat-reliably-on-humans-without-cold-exposure
#8
Milja Holstila, Marko Pesola, Teemu Saari, Kalle Koskensalo, Juho Raiko, Ronald J H Borra, Pirjo Nuutila, Riitta Parkkola, Kirsi A Virtanen
OBJECTIVE: Brown adipose tissue (BAT) is compositionally distinct from white adipose tissue (WAT) in terms of triglyceride and water content. In adult humans, the most significant BAT depot is localized in the supraclavicular area. Our aim is to differentiate brown adipose tissue from white adipose tissue using fat T2* relaxation time mapping and signal-fat-fraction (SFF) analysis based on a commercially available modified 2-point-Dixon (mDixon) water-fat separation method. We hypothesize that magnetic resonance (MR) imaging can reliably measure BAT regardless of the cold-induced metabolic activation, with BAT having a significantly higher water and iron content compared to WAT...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403941/obesity-is-positively-associated-with-arachidonic-acid-derived-5-and-11-hydroxyeicosatetraenoic-acid-hete
#9
Charles Austin Pickens, Lorraine M Sordillo, Chen Zhang, Jenifer I Fenton
BACKGROUND: Oxylipids are oxygenated polyunsaturated fatty acid (PUFA) metabolites that are responsible for the onset and resolution of the inflammatory response. Enzymatic oxygenation through the lipoxygenase (LOX) or cytochrome P450 (CYP) pathways can form oxylipids that have either proinflammatory or proresolving functions depending on the type of PUFA substrate and degree of metabolism. The objective of this study was to determine how PUFA substrates and their corresponding oxylipids are associated with obesity...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403940/vitamin-d-replacement-in-children-adolescents-and-pregnant-women-in-the-middle-east-and-north-africa-a-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#10
REVIEW
Marlene Chakhtoura, Sara El Ghandour, Khaled Shawwa, Elie A Akl, Asma Arabi, Ziyad Mahfoud, Robert Habib, Hassan Hoballah, Ghada El Hajj Fuleihan
INTRODUCTION: Hypovitaminosis D affects one-third to two-thirds of children and pregnant women from the Middle East and North Africa (MENA) region. OBJECTIVE: To evaluate in infants, children, adolescents and pregnant women, from the MENA region, the effect of supplementation with different vitamin D doses on the change in 25-hydroxyvitamin D [25(OH)D] level reached, and other skeletal and non-skeletal outcomes. METHODS: This is a systematic review of randomized controlled trials of vitamin D supplementation conducted in the MENA region...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403939/melanocortin-4-receptor-is-not-required-for-estrogenic-regulations-on-energy-homeostasis-and-reproduction
#11
Pingwen Xu, Liangru Zhu, Kenji Saito, Yongjie Yang, Chunmei Wang, Yanlin He, Xiaofeng Yan, Ilirjana Hyseni, Qingchun Tong, Yong Xu
BACKGROUND: Brain estrogen receptor-α (ERα) is essential for estrogenic regulation of energy homeostasis and reproduction. We previously showed that ERα expressed by pro-opiomelanocortin (POMC) neurons mediates estrogen's effects on food intake, body weight, negative regulation of hypothalamic-pituitary-gonadal axis (HPG axis) and fertility. RESULTS AND CONCLUSIONS: We report here that global deletion of a key downstream receptor for POMC peptide, the melanocortin 4 receptor (MC4R), did not affect normal negative feedback regulation of estrogen on the HPG axis, estrous cyclicity and female fertility...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403938/mondoa-chrebp-the-usual-suspects-of-transcriptional-glucose-sensing-implication-in-pathophysiology
#12
REVIEW
Paul Richards, Sarah Ourabah, Jacques Montagne, Anne-Françoise Burnol, Catherine Postic, Sandra Guilmeau
Identification of the Mondo glucose-responsive transcription factors family, including the MondoA and MondoB/ChREBP paralogs, has shed light on the mechanism whereby glucose affects gene transcription. They have clearly emerged, in recent years, as key mediators of glucose sensing by multiple cell types. MondoA and ChREBP have overlapping yet distinct expression profiles, which underlie their downstream targets and separate roles in regulating genes involved in glucose metabolism. MondoA can restrict glucose uptake and influences energy utilization in skeletal muscle, while ChREBP signals energy storage through de novo lipogenesis in liver and white adipose tissue...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403937/glucocorticoids-modulate-human-brown-adipose-tissue-thermogenesis-in-vivo
#13
RANDOMIZED CONTROLLED TRIAL
Hannah Scotney, Michael E Symonds, James Law, Helen Budge, Don Sharkey, Konstantinos N Manolopoulos
INTRODUCTION: Brown adipose tissue (BAT) is a thermogenic organ with substantial metabolic capacity and has important roles in the maintenance of body weight and metabolism. Regulation of BAT is primarily mediated through the β-adrenoceptor (β-AR) pathway. The in vivo endocrine regulation of this pathway in humans is unknown. The objective of our study was to assess the in vivo BAT temperature responses to acute glucocorticoid administration. METHODS: We studied 8 healthy male volunteers, not pre-selected for BAT presence or activity and without prior BAT cold-activation, on two occasions, following an infusion with hydrocortisone (0...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403936/the-short-term-and-long-term-effects-of-bariatric-metabolic-surgery-on-subcutaneous-adipose-tissue-inflammation-in-humans
#14
Derek K Hagman, Ilona Larson, Jessica N Kuzma, Gail Cromer, Karen Makar, Katya B Rubinow, Karen E Foster-Schubert, Brian van Yserloo, Peter S Billing, Robert W Landerholm, Matthew Crouthamel, David R Flum, David E Cummings, Mario Kratz
CONTEXT: The mechanisms mediating the short- and long-term improvements in glucose homeostasis following bariatric/metabolic surgery remain incompletely understood. OBJECTIVE: To investigate whether a reduction in adipose tissue inflammation plays a role in the metabolic improvements seen after bariatric/metabolic surgery, both in the short-term and longer-term. DESIGN: Fasting blood and subcutaneous abdominal adipose tissue were obtained before (n=14), at one month (n=9), and 6-12months (n=14) after bariatric/metabolic surgery from individuals with obesity who were not on insulin or anti-diabetes medication...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403935/a-prospective-study-of-low-fasting-glucose-with-cardiovascular-disease-events-and-all-cause-mortality-the-women-s-health-initiative
#15
Morgana Mongraw-Chaffin, Andrea Z LaCroix, Dorothy D Sears, Lorena Garcia, Lawrence S Phillips, Elena Salmoirago-Blotcher, Oleg Zaslavsky, Cheryl A M Anderson
BACKGROUND: While there is increasing recognition of the risks associated with hypoglycemia in patients with diabetes, few studies have investigated incident cause-specific cardiovascular outcomes with regard to low fasting glucose in the general population. OBJECTIVE: We hypothesized that low fasting glucose would be associated with cardiovascular disease risk and all-cause mortality in postmenopausal women. METHODS: To test our hypothesis, we used both continuous incidence rates and Cox proportional hazards models in 17,287 participants from the Women's Health Initiative with fasting glucose measured at baseline...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403934/a-synthetic-nitraria-alkaloid-isonitramine-protects-pancreatic-%C3%AE-cell-and-attenuates-postprandial-hyperglycemia
#16
So Jung Kwon, Su Jung Hwang, Yeonghun Jung, Hyeung-Geun Park, Mi-Hyun Kim, Yohan Park, Hyo-Jong Lee
OBJECTIVE: The extracts of Nitraria genus are composed of Nitraria alkaloids and have been used traditionally as a hypoglycemic medicine. However, the efficacy and precise mechanism of Nitraria alkaloids remain largely unknown. METHODS: Previously, we reported the total synthesis of (+)-isonitramine, one of Nitraria alkaloids. In this study, we investigated the anti-diabetic potential of isonitramine in diabetes mellitus and its underlying molecular mechanism in carbohydrate catabolism in vitro and in vivo...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28403933/knocking-down-amygdalar-ptp1b-in-diet-induced-obese-rats-improves-insulin-signaling-action-decreases-adiposity-and-may-alter-anxiety-behavior
#17
Natalia Ferreira Mendes, Gisele Castro, Dioze Guadagnini, Natalia Tobar, Susana Quiros Cognuck, Lucila Leico Kagohara Elias, Patricia Aline Boer, Patricia Oliveira Prada
OBJECTIVE: Protein tyrosine phosphatase 1B (PTP1B) has been extensively implicated in the regulation of body weight, food intake, and energy expenditure. The role of PTP1B appears to be cell and brain region dependent. RESULTS: Herein, we demonstrated that chronic high-fat feeding enhanced PTP1B expression in the central nucleus of the amygdala (CeA) of rats compared to rats on chow. Knocking down PTP1B with oligonucleotide antisense (ASO) decreased its expression and was sufficient to improve the anorexigenic effect of insulin through IR/Akt signaling in the CeA...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28285656/relationships-of-insulin-like-growth-factor-1-its-binding-proteins-and-cardiometabolic-risk-in-hypertensive-perimenopausal-women
#18
Agnieszka Olszanecka, Aneta Dragan, Kalina Kawecka-Jaszcz, Danuta Fedak, Danuta Czarnecka
PURPOSE: During the transition from premenopause to postmenopause, many women experience weight gain and central fat deposition; therefore, we hypothesized that circulating growth factors can play a role in the pathogenesis of hypertension, metabolic syndrome, and subclinical organ damage in perimenopausal women. BASIC PROCEDURES: The study included 192 women aged 40 to 60years; 152 had newly diagnosed essential hypertension that had never been treated, and 40 were normotensive age-matched controls...
April 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28285655/correlation-of-metabolic-syndrome-severity-with-cardiovascular-health-markers-in-adolescents
#19
Arthur M Lee, Matthew J Gurka, Mark D DeBoer
BACKGROUND AND OBJECTIVES: The presence of metabolic syndrome (MetS) in childhood is a significant risk factor for later cardiovascular disease (CVD). Recent data showed temporal decreases in a sex- and race/ethnicity-specific MetS severity z-score among U.S. adolescents. Our goal was to characterize the relationship of this MetS z-score with other CVD risk indicators and assess their temporal trends and lifestyle influences. METHODS: We analyzed 4837 participants aged 12-20years from the National Health and Nutrition Examination Survey by 2-year waves from 1999 to 2012...
April 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28285654/gut-microbiota-interactions-with-the-immunomodulatory-role-of-vitamin-d-in-normal-individuals
#20
Renata V Luthold, Gabriel R Fernandes, Ana Carolina Franco-de-Moraes, Luciana G D Folchetti, Sandra Roberta G Ferreira
BACKGROUND: Due to immunomodulatory properties, vitamin D status has been implicated in several diseases beyond the skeletal disorders. There is evidence that its deficiency deteriorates the gut barrier favoring translocation of endotoxins into the circulation and systemic inflammation. Few studies investigated whether the relationship between vitamin D status and metabolic disorders would be mediated by the gut microbiota composition. OBJECTIVE: We examined the association between vitamin D intake and circulating levels of 25(OH)D with gut microbiota composition, inflammatory markers and biochemical profile in healthy individuals...
April 2017: Metabolism: Clinical and Experimental
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