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https://www.readbyqxmd.com/read/28333098/anti-obesity-and-anti-diabetic-effect-of-neoagarooligosaccharides-on-high-fat-diet-induced-obesity-in-mice
#1
Sun Joo Hong, Je-Hyeon Lee, Eun Joo Kim, Hea Jung Yang, Jae-Seon Park, Soon-Kwang Hong
Neoagarooligosaccharides (NAOs), mainly comprising neoagarotetraose and neoagarohexaose, were prepared by hydrolyzing agar with β-agarase DagA from Streptomyces coelicolor, and the anti-obesity and anti-diabetic effects of NAOs on high-fat diet (HFD)-induced obesity in mice were investigated after NAOs-supplementation for 64 days. Compared to the HFD group, the HFD-0.5 group that was fed with HFD + NAOs (0.5%, w/w) showed remarkable reduction of 36% for body weight gain and 37% for food efficiency ratios without abnormal clinical signs...
March 23, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28328738/inhibition-of-hippocampal-long-term-potentiation-by-high-fat-diets-is-it-related-to-an-effect-of-palmitic-acid-involving-glycogen-synthase-kinase-3
#2
Ana Contreras, Danila Del Rio, Ana Martínez, Carmen Gil, Lidia Morales, Mariano Ruiz-Gayo, Nuria Del Olmo
High-fat diets (HFD) impair hippocampal-dependent learning and memory and produce important changes in synaptic transmission by enhancing glutamate uptake, decreasing synaptic efficacy, and inhibiting plasticity mechanisms such as N-methyl-D-aspartate-mediated long-term depression (LTD) within the hippocampus. Adolescent animals seem to be particularly susceptible to the detrimental effect of HFD as dietary treatments carried out between weaning and early adulthood are much more efficient in terms of hippocampal damage that those carried out during the adult period...
March 21, 2017: Neuroreport
https://www.readbyqxmd.com/read/28327709/fish-oil-supplementation-inhibits-endoplasmic-reticulum-stress-and-improves-insulin-resistance-involvement-of-amp-activated-protein-kinase
#3
Wenqi Yang, Xu Chen, Ming Chen, Yanping Li, Qing Li, Xinwei Jiang, Yan Yang, Wenhua Ling
The beneficial effects of fish oil consumption on glucose metabolism have been generally reported. However, the mechanism underlying the fish oil-induced protective effects against insulin resistance remains unclear. Endoplasmic reticulum (ER) stress is recognized as an important contributor to insulin resistance. The aim of this study is to evaluate whether fish oil supplementation reduces ER stress and ameliorates insulin resistance in diet-induced obese mice, and to investigate the molecular mechanism of fish oil-induced benefits on ER stress...
March 22, 2017: Food & Function
https://www.readbyqxmd.com/read/28327528/anti-obesity-effect-of-bombus-ignitus-queen-glycosaminoglycans-in-rats-on-a-high-fat-diet
#4
Mi Young Ahn, Ban Ji Kim, Ha Jeong Kim, Hyung Joo Yoon, Sang Duck Jee, Jae Sam Hwang, Kun-Koo Park
The mechanism of functional insect glycosaminoglycan (GAG) on obesity caused a high fat diet has not yet been elucidated. Therefore, insect glycosaminoglycans derived from Isaria sinclairii, Bombus ignitus (a type of bumblebee) queen, and Gryllus bimaculatus were purified and investigated as a potential functional food. 14-week old male Wistar rats were fed a high-fat diet (HFD) for 6 weeks. There were five groups that received daily intraperitoneal administration of phosphate buffered saline (PBS, control), GbG (GAG from Gryllus bimaculatus) 10 mg/kg, ISG (GAG from Isaria sinclairii) 10 mg/kg, IQG (GAG from Bombus ignites) 10 mg/kg, or Pravastatin (2 mg/kg)...
March 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28327129/short-term-overfeeding-of-zebrafish-with-normal-or-high-fat-diet-as-a-model-for-the-development-of-metabolically-healthy-versus-unhealthy-obesity
#5
Kathrin Landgraf, Susanne Schuster, Andrej Meusel, Antje Garten, Thomas Riemer, Dorit Schleinitz, Wieland Kiess, Antje Körner
BACKGROUND: Obese individuals differ in their risk of developing metabolic and cardiovascular complications depending on fat distribution (subcutaneous versus visceral) and adipose tissue (AT) phenotype (hyperplasic versus hypertrophic). However, the exact mechanisms which determine whether an obese individual is metabolically healthy or unhealthy are not clear, and analyses of the underlying pathomechanisms are limited by the lack of suitable in vivo models in which metabolically healthy versus metabolically unhealthy AT accumulation can be specifically induced...
March 21, 2017: BMC Physiology
https://www.readbyqxmd.com/read/28326002/anti-obesity-effect-of-solidago-virgaurea-var-gigantea-extract-through-regulation-of-adipogenesis-and-lipogenesis-pathways-in-high-fat-diet-induced-obese-mice-c57bl-6n
#6
Zhiqiang Wang, Ju Hee Kim, Young Soo Jang, Chea Ha Kim, Jae-Yong Lee, Soon Sung Lim
Background: Obesity is associated with an increase in adipogenesis and is becoming a serious health problem in modern society. Objective: The effects of various Solidago virgaurea var. gigantean (SV) ethanolic aqueous extracts on anti-adipogenesis in 3T3-L1 cells were investigated. In addition, the effect of SV 10% ethanolic extract (SV10E) on preventing obesity was studied in high-fat diet-induced obese mice (C57BL/6 N). Design: The effect of SV10E on preventing obesity was studied in mice (n = 6): normal-fat diet, high-fat diet (HFD), HFD supplemented with 1% (10 g/kg) Garcinia cambogia extract of 60% (-)-hydroxycitric acid (positive control), HFD supplemented with 0...
2017: Food & Nutrition Research
https://www.readbyqxmd.com/read/28325574/decoy-receptor-3-analogous-supplement-protects-steatotic-rat-liver-from-ischemia-reperfusion-injury
#7
Tzu-Hao Li, Chih-Wei Liu, Pei-Chang Lee, Chia-Chang Huang, Kuei-Chuan Lee, Yun-Cheng Hsieh, Ying-Ying Yang, Shie-Liang Hsieh, Han-Chieh Lin, Chang-Youh Tsai
BACKGROUND: For steatotic livers, pharmacological approaches to minimize the hepatic neutrophil and macrophage infiltration, and cytokine and chemokine release in ischemia-reperfusion (IR) injury are still limited. Tumor necrosis factor (TNF)-α superfamily-stimulated pathogenic cascades and M1 macrophage/Kupffer cells (KC) polarization from Th1 cytokines are important in the pathogenesis of IR liver injury with hepatic steatosis (HS). Conversely, anti-inflammatory M2 macrophages produce Th2 cytokine (interleukin-4), which reciprocally enhances M2 polarization...
March 16, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/28324105/thyroid-hormone-dependent-epigenetic-regulation-of-melanocortin-4-receptor-levels-in-female-offspring-of-obese-rats
#8
T Tabachnik, T Kisliouk, A Marco, N Meiri, A Weller
Maternal obesity is a risk factor for offspring obesity. Melanocortin 4 receptor (Mc4r) is one of the mediators of food intake and energy balance. This study examines epigenetic mechanisms underlying altered Mc4r levels in the hypothalamic paraventricular nucleus in offspring of high-fat diet (HFD)-induced obese dams, and aims to elucidate the role of thyroid hormones in epigenetic regulation and tagging of their nucleosome at the Mc4r promoter. Female Wistar rats were fed HFD or chow from weaning through gestation and lactation...
January 9, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323978/assisted-reproductive-technologies-predispose-to-insulin-resistance-and-obesity-in-male-mice-challenged-with-a-high-fat-diet
#9
David Cerny, Claudio Sartori, Stefano F Rimoldi, Théo Meister, Rodrigo Soria, Elisa Bouillet, Urs Scherrer, Emrush Rexhaj
ART alters glucose homeostasis in mice and humans, but the underlying mechanisms are incompletely understood. ART induces endothelial dysfunction and arterial hypertension by epigenetic alteration of the eNOS gene. In eNOS deficient mice, insulin resistance is related to impaired insulin stimulation of muscle blood flow and substrate delivery and defective intrinsic skeletal muscle glucose uptake. We, therefore, assessed glucose tolerance, insulin sensitivity (euglycemic clamp), insulin stimulation of muscle blood flow in vivo and muscle glucose uptake in vitro in male ART and control mice fed a normal chow (NC) or challenged with a high fat diet (HFD) during 8 weeks...
February 8, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323977/short-term-vs-long-term-effects-of-adipocyte-toll-like-receptor-4-activation-on-insulin-resistance-in-male-mice
#10
Caroline Tao, William L Holland, Qiong A Wang, Mengle Shao, Lin Jia, Kai Sun, Xiaoli Lin, Yi-Chun Kuo, Joshua A Johnson, Ruth Gordillo, Joel K Elmquist, Philipp E Scherer
Chronic exposure to diets high in saturated fat (HFD) increases the prevalence of obesity and contributes to the development of low-grade inflammation and insulin resistance. A possible mediator accounting for obesity-associated inflammation and insulin resistance is Toll-like receptor 4 (TLR4). We investigated the role of adipocyte TLR4 in lipid and glucose homeostasis through an inducible, adipocyte-specific deletion of TLR4, the "TADIPO mouse". Consistent with a critical role for inflammation as a positive force for healthy adipose tissue expansion, chronic HFD exposure resulted in exacerbated whole body and muscle insulin resistance in the absence of TLR4 in the adipocyte...
February 24, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323942/incretin-therapies-do-not-expand-%C3%AE-cell-mass-or-alter-pancreatic-histology-in-young-male-mice
#11
Aaron R Cox, Carol J Lam, Matthew M Rankin, Jacqueline S Rios, Julia Chavez, Claire W Bonnyman, Kourtney B King, Roger A Wells, Deepti Anthony, Justin X Tu, Jenny J Kim, Changhong Li, Jake A Kushner
The impact of incretins upon pancreatic β-cell expansion remains extremely controversial. Multiple studies indicate that incretin-based therapies can increase β-cell proliferation, and incretins have been hypothesized to expand β-cell mass. However, considerable disagreement exists on whether incretins actually increase β-cell mass. Moreover, some reports indicate that incretins may cause metaplastic changes in pancreatic histology. To resolve these questions we treated a large cohort of mice with incretin-based therapies and carried out a rigorous analysis of β-cell turnover and pancreatic histology using high-throughput imaging...
March 8, 2017: Endocrinology
https://www.readbyqxmd.com/read/28315324/nucleolin-protects-macrophages-from-oxldl-induced-foam-cell-formation-through-up-regulating-abca1-expression
#12
Yuanbin Li, Bimei Jiang, Pengfei Liang, Zhongyi Tong, Meidong Liu, Qinglan Lv, Yanjuan Liu, Xuanyou Liu, Yuting Tang, Xianzhong Xiao
Our recent studies have indicated that nucleolin, as a multifunctional RNA-binding protein, exerts protective effects in the myocardial cells and endothelial cells under the condition of oxidative stress. However, the function of nucleolin and its potential mechanism in macrophage-derived foam cell formation remain largely unexplored. ApoE-/- mice were fed with a high-fat diet (HFD) for 10-24 weeks. Protein expression was measured by western blotting or immunofluorescence, and gene expression at the mRNA level was detected by qRT-PCR...
March 14, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28314964/increased-intake-of-energy-dense-diet-and-negative-energy-balance-in-a-mouse-model-of-chronic-psychosocial-defeat
#13
Roberto Coccurello, Adele Romano, Giacomo Giacovazzo, Bianca Tempesta, Marco Fiore, Anna Maria Giudetti, Ilaria Marrocco, Fabio Altieri, Anna Moles, Silvana Gaetani
PURPOSE: Chronic exposure to stress may represent a risk factor for developing metabolic and eating disorders, mostly driven by the overconsumption of easily accessible energy-dense palatable food, although the mechanisms involved remain still unclear. In this study, we used an ethologically oriented murine model of chronic stress caused by chronic psychosocial defeat (CPD) to investigate the effects of unrestricted access to a palatable high fat diet (HFD) on food intake, body weight, energy homeostasis, and expression of different brain neuropeptides...
March 17, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28314763/endothelial-dysfunction-inhibits-the-ability-of-haptoglobin-to-prevent-hemoglobin-induced-hypertension
#14
Jan A Graw, Binglan Yu, Emanuele Rezoagli, H Shaw Warren, Emmanuel S Buys, Donald B Bloch, Warren M Zapol
BACKGROUND: Intravascular hemolysis produces injury in a variety of human diseases including hemoglobinopathies, malaria, and sepsis. The adverse effects of increased plasma hemoglobin are partly mediated by depletion of nitric oxide (NO) and result in vasoconstriction. Circulating plasma proteins haptoglobin and hemopexin scavenge extracellular hemoglobin and cell-free heme, respectively. METHODS: The ability of human haptoglobin or hemopexin to inhibit the adverse effects of NO-scavenging by circulating murine hemoglobin was tested in C57Bl/6 mice...
March 17, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28314104/ginsenoside-re-ameliorates-brain-insulin-resistance-and-cognitive-dysfunction-in-high-fat-diet-induced-c57bl-6-mice
#15
Jong Min Kim, Chang Hyeon Park, Seon Kyeong Park, Tae Wan Seung, Jin Yong Kang, Jeong Su Ha, Du Sang Lee, Uk Lee, Dae-Ok Kim, Ho Jin Heo
The ameliorating effects of ginsenoside Re (G Re) on high fat diet (HFD)-induced insulin resistance in C57BL/6 mice were investigated to assess its physiological function. In the results of behavioral tests, G Re improved cognitive dysfunction in diabetic mice using Y-maze, passive avoidance, and Morris water maze tests. G Re also significantly recovered hyperglycemia and fasting blood glucose level. In the results of serum analysis, G Re decreased triglyceride (TG), total cholesterol (TCHO), low-density lipoprotein cholesterol (LDLC), glutamic-oxaloacetic transaminase (GOT), and glutamic-pyruvic transaminase (GPT) and increased the ratio of high-density lipoprotein cholesterol (HDLC)...
March 24, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28303158/antidiabetic-effect-of-fresh-nopal-opuntia-ficus-indica-in-low-dose-streptozotocin-induced-diabetic-rats-fed-a-high-fat-diet
#16
Seung Hwan Hwang, Il-Jun Kang, Soon Sung Lim
The objective of the present study was to evaluate α-glucosidase inhibitory and antidiabetic effects of Nopal water extract (NPWE) and Nopal dry power (NADP) in low-dose streptozotocin- (STZ-) induced diabetic rats fed a high-fat diet (HFD). The type 2 diabetic rat model was induced by HFD and low-dose STZ. The rats were divided into four groups as follows: (1) nondiabetic rats fed a regular diet (RD-Control); (2) low-dose STZ-induced diabetic rats fed HFD (HF-STZ-Control); (3) low-dose STZ-induced diabetic rats fed HFD and supplemented with NPWE (100 mg/kg body weight, HF-STZ-NPWE); and (4) low-dose STZ-induced diabetic rats fed HFD and supplemented with comparison medication (rosiglitazone, 10 mg/kg, body weight, HF-STZ-Rosiglitazone)...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28302863/transfer-of-dysbiotic-gut-microbiota-has-beneficial-effects-on-host-liver-metabolism
#17
Simon Nicolas, Vincent Blasco-Baque, Audren Fournel, Jerome Gilleron, Pascale Klopp, Aurelie Waget, Franck Ceppo, Alysson Marlin, Roshan Padmanabhan, Jason S Iacovoni, François Tercé, Patrice D Cani, Jean-François Tanti, Remy Burcelin, Claude Knauf, Mireille Cormont, Matteo Serino
Gut microbiota dysbiosis has been implicated in a variety of systemic disorders, notably metabolic diseases including obesity and impaired liver function, but the underlying mechanisms are uncertain. To investigate this question, we transferred caecal microbiota from either obese or lean mice to antibiotic-free, conventional wild-type mice. We found that transferring obese-mouse gut microbiota to mice on normal chow (NC) acutely reduces markers of hepatic gluconeogenesis with decreased hepatic PEPCK activity, compared to non-inoculated mice, a phenotypic trait blunted in conventional NOD2 KO mice...
March 16, 2017: Molecular Systems Biology
https://www.readbyqxmd.com/read/28302517/exercise-training-rescues-high-fat-diet-induced-neuronal-nitric-oxide-synthase-expression-in-the-hippocampus-and-cerebral-cortex-of-mice
#18
Yuki Tomiga, Saki Yoshimura, Ai Ito, Shihoko Nakashima, Kentaro Kawanaka, Yoshinari Uehara, Hiroaki Tanaka, Yasuki Higaki
Consumption of a high fat diet (HFD) and being overweight both induce functional deterioration and atrophy of the hippocampus. These alterations are associated with mental disorders such as depression and anxiety. Exercise combats obesity and enhances brain health. There is substantial evidence that neuronal nitric oxide synthase (nNOS) is a key regulator of affective behavior, and that increased brain nNOS leads to anxiety while environmental enrichment (EE), which reduces brain nNOS, has anxiolytic effects...
March 13, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28302472/erk1-and-erk2-activation-modulates-diet-induced-obesity-in-mice
#19
Amira Sayed Khan, Selvakumar Subramaniam, Gado Dramane, Douadi Khelifi, Naim Akhtar Khan
Obesity is a worldwide problem, and dietary lipids play an important role in its pathogenesis. Recently, Erk1 knock-out (ERK1(-/-)) mice have been shown to exhibit low preference for dietary fatty acids. Hence, we maintained Erk1(-/-) mice on a high-fat diet (HFD) to assess the implication of this mitogen-activated protein (MAP) kinase in obesity. The Erk1(-/-) mice, fed the HFD, were more obese than wild-type (WT) animals, fed the same diet. Erk1(-/-) obese mice gained more fat and liver mass than WT obese animals...
March 13, 2017: Biochimie
https://www.readbyqxmd.com/read/28301852/high-fat-diet-in-the-absence-of-obesity-does-not-aggravate-surgically-induced-lymphoedema-in-mice
#20
Epameinondas Gousopoulos, Sinem Karaman, Steven T Proulx, Kristin Leu, Dorina Buschle, Michael Detmar
BACKGROUND: Lymphoedema represents the cardinal manifestation of lymphatic dysfunction and is associated with expansion of the adipose tissue in the affected limb. In mice, high-fat diet (HFD)-induced obesity was associated with impaired collecting lymphatic vessel function, and adiposity aggravated surgery-induced lymphoedema in a mouse model. The aim of the current study was to investigate whether adiposity is necessary to impair lymphatic function or whether increased lipid exposure alone might be sufficient in a surgical lymphoedema model...
March 17, 2017: European Surgical Research. Europäische Chirurgische Forschung. Recherches Chirurgicales Européennes
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