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https://www.readbyqxmd.com/read/27933334/improved-glycaemia-in-high-fat-fed-neprilysin-deficient-mice-is-associated-with-reduced-dpp-4-activity-and-increased-active-glp-1-levels
#1
Joshua R Willard, Breanne M Barrow, Sakeneh Zraika
AIM/HYPOTHESIS: Neprilysin, a widely expressed peptidase, is upregulated in metabolically altered states such as obesity and type 2 diabetes. Like dipeptidyl peptidase-4 (DPP-4), neprilysin can degrade and inactivate the insulinotropic peptide glucagon-like peptide-1 (GLP-1). Thus, we investigated whether neprilysin deficiency enhances active GLP-1 levels and improves glycaemia in a mouse model of high fat feeding. METHODS: Nep (+/+) and Nep (-/-) mice were fed a 60% fat diet for 16 weeks, after which active GLP-1 and DPP-4 activity levels were measured, as were glucose, insulin and C-peptide levels during an OGTT...
December 8, 2016: Diabetologia
https://www.readbyqxmd.com/read/27933186/effect-of-type-and-amount-of-dietary-carbohydrate-on-biomarkers-of-glucose-homeostasis-and-c-reactive-protein-in-overweight-or-obese-adults-results-from-the-omnicarb-trial
#2
Stephen P Juraschek, Edgar R Miller, Elizabeth Selvin, Vincent J Carey, Lawrence J Appel, Robert H Christenson, Frank M Sacks
OBJECTIVE: The glycemic index (GI) of dietary carbohydrate is thought to affect glucose homeostasis. Recently, the Effect of Amount and Type of Dietary Carbohydrates on Risk for Cardiovascular Heart Disease and Diabetes Study (OmniCarb) trial reported that a low-GI diet did not improve insulin sensitivity. We conducted this ancillary study of the OmniCarb trial to determine the effects of GI and carbohydrate content on glucose homeostasis and inflammation. RESEARCH DESIGN AND METHODS: OmniCarb was a randomized cross-over feeding study conducted in overweight or obese adults without diabetes (N=163)...
2016: BMJ Open Diabetes Research & Care
https://www.readbyqxmd.com/read/27933093/long-term-consumption-of-an-obesogenic-high-fat-diet-prior-to-ischemia-reperfusion-mediates-cardioprotection-via-epac1-dependent-signaling
#3
F Edland, A Wergeland, R Kopperud, K S Åsrud, E A Hoivik, S L Witsø, R Æsøy, L Madsen, K Kristiansen, M Bakke, S O Døskeland, A K Jonassen
BACKGROUND: Obesity is still considered a risk factor for cardiovascular disease, although more recent knowledge also suggests obesity to be associated with reduced morbidity and mortality - the "obesity paradox". This study explores if long-term feeding of an obesogenic high fat diet renders the myocardium less susceptible to ischemic-reperfusion induced injury via Epac-dependent signaling. METHODS: Wild type (wt), Epac1 (Epac1(-/-)) and Epac2 (Epac2(-/-)) deficient mice were fed a high fat (HFD) or normal chow diet (ND) for 33 ± 1 weeks...
2016: Nutrition & Metabolism
https://www.readbyqxmd.com/read/27928979/feed-restriction-and-insulin-like-growth-factor-i-igf-i-affect-the-oocyte-maturation-in-matrinx%C3%A3-brycon-amazonicus
#4
Luís Henrique Montrezor, Elisabeth Criscuolo Urbinati
The feeding and nutrition of breeders are crucial aspects in the reproductive process. During the maturation period, metabolic changes occur aiming at mobilizing energy for growth and follicular development. The involvement of IGF-1 in metabolic and reproductive events is important. The aim of this work was to evaluate if alternate feed restriction and re-feeding have permissive effects on in vitro actions of IGF-1 on oocytes development of matrinxã. In vivo experiments were performed during vitellogenesis period...
December 8, 2016: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/27928525/effects-of-alcohol-consumption-frequency-on-health-index-in-korean-women
#5
Hee-Ju Kwon, Ik-Rae Cho, Hyo-Joo Park, Tae-Young Kim
BACKGROUND: In this study, we examined the status of Korean women's alcohol consumption and identified the physical changes they undergo according to the level of consumption. The results of this study may thus be used as raw data to effectively control women' drinking habits. METHODS: This study consists of a secondary analysis using data from female participants in the 6(th) Korea National Health and Nutrition Examination Survey, which was conducted by the Korea Centers for Disease Control and Prevention(2013-2014, V-2)...
August 2016: Iranian Journal of Public Health
https://www.readbyqxmd.com/read/27927266/enzymatically-modified-starch-up-regulates-expression-of-incretins-and-sodium-coupled-monocarboxylate-transporter-in-jejunum-of-growing-pigs
#6
B U Metzler-Zebeli, R Ertl, D Grüll, T Molnar, Q Zebeli
Dietary effects on the host are mediated via modulation of the intestinal mucosal responses. The present study investigated the effect of an enzymatically modified starch (EMS) product on the mucosal expression of genes related to starch digestion, sugar and short-chain fatty acid (SCFA) absorption and incretins in the jejunum and cecum in growing pigs. Moreover, the impact of the EMS on hepatic expression of genes related to glucose and lipid metabolism, and postprandial serum metabolites were assessed. Barrows (n=12/diet; initial BW 29 kg) were individually fed three times daily with free access to a diet containing either EMS or waxy corn starch as control (CON) for 10 days...
December 8, 2016: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/27926856/insulin-dependent-activation-of-mch-neurons-impairs-locomotor-activity-and-insulin-sensitivity-in-obesity
#7
A Christine Hausen, Johan Ruud, Hong Jiang, Simon Hess, Hristo Varbanov, Peter Kloppenburg, Jens C Brüning
Melanin-concentrating-hormone (MCH)-expressing neurons (MCH neurons) in the lateral hypothalamus (LH) are critical regulators of energy and glucose homeostasis. Here, we demonstrate that insulin increases the excitability of these neurons in control mice. In vivo, insulin promotes phosphatidylinositol 3-kinase (PI3K) signaling in MCH neurons, and cell-type-specific deletion of the insulin receptor (IR) abrogates this response. While lean mice lacking the IR in MCH neurons (IR(ΔMCH)) exhibit no detectable metabolic phenotype under normal diet feeding, they present with improved locomotor activity and insulin sensitivity under high-fat-diet-fed, obese conditions...
December 6, 2016: Cell Reports
https://www.readbyqxmd.com/read/27922115/perilipin-5-fine-tunes-lipid-oxidation-to-metabolic-demand-and-protects-against-lipotoxicity-in-skeletal-muscle
#8
Claire Laurens, Virginie Bourlier, Aline Mairal, Katie Louche, Pierre-Marie Badin, Etienne Mouisel, Alexandra Montagner, André Marette, Angelo Tremblay, John S Weisnagel, Hervé Guillou, Dominique Langin, Denis R Joanisse, Cedric Moro
Lipid droplets (LD) play a central role in lipid homeostasis by controlling transient fatty acid (FA) storage and release from triacylglycerols stores, while preventing high levels of cellular toxic lipids. This crucial function in oxidative tissues is altered in obesity and type 2 diabetes. Perilipin 5 (PLIN5) is a LD protein whose mechanistic and causal link with lipotoxicity and insulin resistance has raised controversies. We investigated here the physiological role of PLIN5 in skeletal muscle upon various metabolic challenges...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27919829/training-induced-elevations-in-extracellular-lactate-in-hippocampus-and-striatum-dissociations-by-cognitive-strategy-and-type-of-reward
#9
Lori A Newman, Claire J Scavuzzo, Paul E Gold, Donna L Korol
Recent evidence suggests that astrocytes convert glucose to lactate, which is released from the astrocytes and supports learning and memory. This report takes a multiple memory perspective to test the role of astrocytes in cognition using real-time lactate measurements during learning and memory. Extracellular lactate levels in the hippocampus or striatum were determined with lactate biosensors while rats were learning place (hippocampus-sensitive) or response (striatum-sensitive) versions of T-mazes. In the first experiment, rats were trained on the place and response tasks to locate a food reward...
December 2, 2016: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/27914782/co-metabolism-of-substrates-by-bacillus-thuringiensis-regulates-polyhydroxyalkanoate-co-polymer-composition
#10
Subhasree Ray, Vipin Chandra Kalia
Polyhydroxyalkanoate (PHA) production by Bacillus thuringiensis EGU45 was studied by co-metabolism of crude glycerol (CG) (1%, v/v), glucose (0.05-0.5%, w/v) and propionic acid (0.05-0.5%, v/v) under batch (shake flask) culture conditions. Glycerol+PA combination resulted in 15-100mg/L PHA co-polymers with a HV content of 33-81mol%. The addition of NH4Cl (0.5%, w/v) to CG+PA enhanced PHA production by 1.55-fold, with a HV content of 58-70mol%. The time period of incubation of PA to the feed: CG+glucose was optimized to be 3h after initiation of fermentation...
November 23, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27914036/prolactin-regulatory-element-binding-protein-is-involved-in-suppression-of-the-adiponectin-gene-in-vivo
#11
X Z Zhang, H Imachi, J Y Lyu, K Fukunaga, S Sato, T Ibata, T Kobayashi, T Yoshimoto, F Kikuchi, T Dong, K Murao
PURPOSE: Prolactin regulatory element-binding protein (PREB), a member of the WD-repeat protein family, has been recognized as a transcriptional factor that regulates prolactin promoter activity in the anterior pituitary of rats. PREB is expressed not only in the pituitary but also in various other tissues, including the adipose tissue. Previous studies have shown that PREB acts as a transcriptional regulator and suppresses the expression of the adiponectin gene in cultured 3T3L1 preadipocytes...
December 2, 2016: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/27909992/roles-for-orexin-hypocretin-in-the-control-of-energy-balance-and-metabolism
#12
Paulette B Goforth, Martin G Myers
The neuropeptide hypocretin is also commonly referred to as orexin, since its orexigenic action was recognized early. Orexin/hypocretin (OX) neurons project widely throughout the brain and the physiologic and behavioral functions of OX are much more complex than initially conceived based upon the stimulation of feeding. OX most notably controls functions relevant to attention, alertness, and motivation. OX also plays multiple crucial roles in the control of food intake, metabolism, and overall energy balance in mammals...
December 2, 2016: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/27908915/-the-hypothalamic-glucagon-like-peptide-1-glp-1-receptor-glp-1r-is-sufficient-but-not-necessary-for-the-regulation-of-energy-balance-and-glucose-homeostasis-in-mice
#13
Melissa A Burmeister, Jennifer E Ayala, Hannah Smouse, Adriana Landivar-Rocha, Jacob D Brown, Daniel J Drucker, Doris A Stoffers, Darleen A Sandoval, Randy J Seeley, Julio E Ayala
Pharmacological activation of the hypothalamic glucagon-like peptide-1 (GLP-1) receptor (GLP-1R) promotes weight loss and improves glucose tolerance. This demonstrates that the hypothalamic GLP-1R is sufficient but does not show whether it is necessary for the effects of exogenous GLP-1R agonists (GLP-1RA) or endogenous GLP-1 on these parameters. To address this, we crossed mice harboring floxed Glp1r alleles to mice expressing Nkx2.1-Cre to knock down Glp1r expression throughout the hypothalamus (GLP-1RKD(ΔNkx2...
December 1, 2016: Diabetes
https://www.readbyqxmd.com/read/27906983/tithonia-diversifolia-as-a-supplementary-feed-for-dairy-cows
#14
Rafael Sandin Ribeiro, Stephanie Amelia Terry, João Paulo Sacramento, Sylvia Rocha E Silveira, Cláudia Braga Pereira Bento, Elsa Fernandes da Silva, Hilário Cuquetto Mantovani, Marco Antônio Sundfeld da Gama, Luiz Gustavo Ribeiro Pereira, Thierry Ribeiro Tomich, Rogério Martins Maurício, Alexandre Vieira Chaves
The objective of this study was to examine the effects of Tithonia diversifolia as a supplementary forage on dairy cow performance and methane production. Nine lactating Holstein × Zebu dairy cows (519 ± 53.3 kg of body weight and 66 ± 13.3 d in milk) were paired by milk yield (21.3 ± 2.34 kg/d) and body weight and randomly assigned to three dietary treatments in a Latin square design with 21-d experimental periods (14 d for diet adaptation and 7 d for measurements and sample collection). The dietary treatments included the control diet consisting of fresh sugar cane plus concentrate (44:56, % of diet DM), and two treatment diets containing different levels of fresh T...
2016: PloS One
https://www.readbyqxmd.com/read/27906144/positive-regulation-of-biochemical-parameters-by-tea-polyphenol-encapsulated-solid-lipid-nanoparticles-at-in-vitro-and-in-vivo-conditions
#15
Karikalan Kulandaivelu, Abul Kalam Azad Mandal
Tea polyphenols (TPPs) comprise preventive and therapeutic potentials against cancer, cardiovascular and neurological disorders. Chemical instability of TPP which leads to low bioavailability is the major constrain to its use as therapeutic agent. The authors prepared TPP encapsulated solid lipid nanoparticles (TPP-SLNs) to increase its stability and bioefficacy. Comparison of Fourier transformed infrared spectra of unloaded SLN, free TPP and TPP-SLN indicated encapsulation of TPP. Sustained release of TPP from TP-SLN was observed...
December 2016: IET Nanobiotechnology
https://www.readbyqxmd.com/read/27906111/the-functional-significance-of-the-skeletal-muscle-clock-lessons-from-bmal1-knockout-models
#16
REVIEW
Stefano Schiaffino, Bert Blaauw, Kenneth A Dyar
The circadian oscillations of muscle genes are controlled either directly by the intrinsic muscle clock or by extrinsic factors, such as feeding, hormonal signals, or neural influences, which are in turn regulated by the central pacemaker, the suprachiasmatic nucleus of the hypothalamus. A unique feature of circadian rhythms in skeletal muscle is motor neuron-dependent contractile activity, which can affect the oscillation of a number of muscle genes independently of the muscle clock. The role of the intrinsic muscle clock has been investigated using different Bmal1 knockout (KO) models...
October 13, 2016: Skeletal Muscle
https://www.readbyqxmd.com/read/27906079/muscle-specific-loss-of-bmal1-leads-to-disrupted-tissue-glucose-metabolism-and-systemic-glucose-homeostasis
#17
Brianna D Harfmann, Elizabeth A Schroder, Maureen T Kachman, Brian A Hodge, Xiping Zhang, Karyn A Esser
BACKGROUND: Diabetes is the seventh leading cause of death in the USA, and disruption of circadian rhythms is gaining recognition as a contributing factor to disease prevalence. This disease is characterized by hyperglycemia and glucose intolerance and symptoms caused by failure to produce and/or respond to insulin. The skeletal muscle is a key insulin-sensitive metabolic tissue, taking up ~80 % of postprandial glucose. To address the role of the skeletal muscle molecular clock to insulin sensitivity and glucose tolerance, we generated an inducible skeletal muscle-specific Bmal1 (-/-) mouse (iMSBmal1 (-/-))...
March 30, 2016: Skeletal Muscle
https://www.readbyqxmd.com/read/27903452/%C3%AE-glucan-induced-cortisol-levels-improve-the-early-immune-response-in-matrinx%C3%A3-brycon-amazonicus
#18
Luz N Franco Montoya, Talísia P Martins, Rodrigo Y Gimbo, Fábio S Zanuzzo, Elisabeth C Urbinati
This study investigated the role of endogenous cortisol on the innate immune response in matrinxã (Brycon amazonicus) fed with β-glucan, prior to and after stressor exposure and bacterial challenge. For this, we evaluated the serum cortisol and plasma glucose levels, the serum lysozyme levels, the hemolytic activity of the complement system, and the respiratory activity of leukocytes, as well as the number of circulating erythrocytes and leukocytes of fish fed during 15 days with diets containing β-glucan 0...
November 27, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27901601/activation-of-estrogen-response-element-independent-er%C3%AE-signaling-protects-female-mice-from-diet-induced-obesity
#19
Ali Yasrebi, Janelle A Rivera, Elizabeth A Krumm, Jennifer A Yang, Troy A Roepke
17β-estradiol (E2) regulates central and peripheral mechanisms that control energy and glucose homeostasis predominantly through estrogen receptor α (ERα) acting via receptor binding to estrogen response elements (ERE). ERα signaling is also involved in mediating the effects of E2 on diet-induced obesity (DIO), although the roles of ERE-dependent and -independent ERα signaling in ameliorating the effects of DIO remain largely unknown. We hypothesize that ERE-dependent ERα signaling is necessary to ameliorate the effects of DIO...
November 30, 2016: Endocrinology
https://www.readbyqxmd.com/read/27900626/selection-of-chemically-defined-media-for-cho-cell-fed-batch-culture-processes
#20
Xiao Pan, Mathieu Streefland, Ciska Dalm, René H Wijffels, Dirk E Martens
Two CHO cell clones derived from the same parental CHO(BC®) cell line and producing the same monoclonal antibody (BC-G, a low producing clone; BC-P, a high producing clone) were tested in four basal media in all possible combinations with three feeds (=12 conditions) in fed-batch cultures. Higher amino acid feeding did not always lead to higher mAb production. The two clones showed differences in cell physiology, metabolism and optimal medium-feed combinations. During the phase transitions of all cultures, cell metabolism showed a shift represented by lower specific consumption and production rates, except for the specific glucose consumption rate in cultures fed by Actifeed A/B...
November 29, 2016: Cytotechnology
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