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https://www.readbyqxmd.com/read/27901349/curcumin-improves-the-metabolic-syndrome-in-high-fructose-diet-fed-rats-role-of-tnf-%C3%AE-nf-%C3%AE%C2%BAb-and-oxidative-stress
#1
Mohamed Elsayed Kelany, Tahir M Hakami, Adel H Omar
This study aimed to investigate effects of curcumin on high fructose diet (HFD)-induced metabolic syndrome (MetS) in rats and the possible mechanisms involved. MetS was induced in male albino rats (n = 20), over 8 weeks, by 65% HFD. For 8-week experiment period, rats were assigned to 2 equal groups: curcumin-treated rats received curcumin (200 mg/kg, p.o, once daily) along with HFD, and untreated rats were fed with HFD only. We evaluated body mass (BM), systolic blood pressure (SBP), homeostasis model assessment of insulin resistance (HOMA-IR), and serum levels of glucose, insulin, leptin, total cholesterol (TC), triglycerides (TGs), uric acid, malondialdehyde (MDA; lipid peroxidation product), and tumor necrosis factor-α (TNF-α; inflammatory cytokine), and serum catalase (endogenous antioxidant) activity and immunohistochemical expression of nuclear factor κB (NF-κB; inflammation-related transcription factor) in hepatocytes...
August 17, 2016: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/27895819/nutrition-insulin-resistance-and-dysfunctional-adipose-tissue-determine-the-different-components-of-metabolic-syndrome
#2
REVIEW
Juan Antonio Paniagua
Obesity is an excessive accumulation of body fat that may be harmful to health. Today, obesity is a major public health problem, affecting in greater or lesser proportion all demographic groups. Obesity is estimated by body mass index (BMI) in a clinical setting, but BMI reports neither body composition nor the location of excess body fat. Deaths from cardiovascular diseases, cancer and diabetes accounted for approximately 65% of all deaths, and adiposity and mainly abdominal adiposity are associated with all these disorders...
November 15, 2016: World Journal of Diabetes
https://www.readbyqxmd.com/read/27894971/aqueous-seed-extract-of-hunteria-umbellata-k-schum-hallier-f-apocynaceae-palliates-hyperglycemia-insulin-resistance-dyslipidemia-inflammation-and-oxidative-stress-in-high-fructose-diet-induced-metabolic-syndrome-in-rats
#3
T O Ajiboye, A A Hussaini, B Y Nafiu, O B Ibitoye
ETHNOPHARMACOLOGICAL RELEVANCE: Hunteria umbellata is used in the management and treatment of diabetes and obesity in Nigeria. This study evaluates the effect of aqueous seed extract of Hunteria umbellata on insulin resistance, dyslipidemia, inflammation and oxidative stress in high-fructose diet-induced metabolic syndrome. MATERIALS AND METHODS: Rats were randomized into seven groups (A-G). Control (group A) and group C rats received control diet for nine weeks while rats in groups B, D - G were placed on high-fructose diet for 9 weeks...
November 25, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27886622/linoleic-acid-causes-greater-weight-gain-than-saturated-fat-without-hypothalamic-inflammation-in-the-male-mouse
#4
Kyle J Mamounis, Ali Yasrebi, Troy A Roepke
A significant change in the Western diet, concurrent with the obesity epidemic, was a substitution of saturated fatty acids with polyunsaturated, specifically linoleic acid (LA). Despite increasing investigation on type as well as amount of fat, it is unclear which fatty acids are most obesogenic. The objective of this study was to determine the obesogenic potency of LA vs. saturated fatty acids and the involvement of hypothalamic inflammation. Forty-eight mice were divided into four groups: low-fat or three high-fat diets (HFDs, 45% kcals from fat) with LA comprising 1%, 15% and 22...
November 4, 2016: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/27884961/therapeutic-silencing-of-fat-specific-protein-27-improves-glycemic-control-in-mouse-models-of-obesity-and-insulin-resistance
#5
Cédric Langhi, Noemí Arias, Ananthi Rajamoorthi, Jeannine Basta, Richard G Lee, Ángel Baldán
Obesity is a component of the metabolic syndrome, mechanistically linked to diabetes, fatty liver disease, and cardiovascular disease. Proteins that regulate the metabolic fate of intracellular lipid droplets are potential therapeutic candidates to treat obesity and its related consequences. CIDEC (cell death-inducing DFFA-like effector C), also known in mice as Fsp27 (fat-specific protein 27), is a lipid droplet-associated protein that prevents lipid mobilization and promotes intracellular lipid storage. The consequences of complete loss of FSP27 on hepatic metabolism and on insulin resistance are controversial, as both healthy and deleterious lipodystrophic phenotypes have been reported in Fsp27-/- mice...
November 24, 2016: Journal of Lipid Research
https://www.readbyqxmd.com/read/27884680/caloric-restriction-ameliorates-cardiomyopathy-in-animal-model-of-diabetes
#6
Keren Cohen, Maayan Waldman, Nader G Abraham, Michal Laniado-Schwartzman, Danny Gurfield, Dan Aravot, Michael Arad, Edith Hochhauser
BACKGROUND: The db/db mouse is an animal model of diabetes in which leptin receptor activity is deficient resulting accelerated cardiomyopathy when exposed to angiotensin (AT). Toll-like receptors 4 and 2 (TLR4, TLR2) are pattern recognition receptors, that recognize pathogen-associated molecular patterns and exacerbate and release inflammatory cytokines. Fetuin A (Fet A) is a fatty acid carrier which affects inflammation and insulin resistance in obese humans and animals through TLRs...
November 21, 2016: Experimental Cell Research
https://www.readbyqxmd.com/read/27883275/comparative-analysis-of-three-human-adipocyte-size-measurement-methods-and-their-relevance-for-cardiometabolic-risk
#7
Sofia Laforest, Andréanne Michaud, Gaétan Paris, Mélissa Pelletier, Hubert Vidal, Alain Géloën, André Tchernof
OBJECTIVE: To determine whether adipocyte diameters from three measurement methods are similarly associated with adiposity measurements and cardiometabolic variables. METHODS: Surgical samples of omental and abdominal subcutaneous adipose tissue were obtained in a sample of 60 women (age 35-59 years; body mass index 20.3-41.1 kg/m(2) ). Median adipocyte diameter of the main cell population was determined by collagenase digestion, osmium tetroxide fixation, and histological analysis...
November 24, 2016: Obesity
https://www.readbyqxmd.com/read/27876139/conversations-between-insulin-and-bone-potential-mechanism-of-high-bone-density-in-patients-with-berardinelli-seip-congenital-lipodystrophy
#8
Josivan Gomes Lima, Natalia Nobrega Lima, Lucia Helena C Nobrega, Selma Maria B Jeronimo
Berardinelli-Seip Congenital Lipodystrophy (BSCL) is a rare autosomal recessive syndrome characterized by a difficulty storing lipid in adipocytes, low body fat, hypertriglyceridemia, and fat liver. The serum leptin is usually very low, and serum insulin, as well as HOMAIR (homeostasis model assessment), is very high and correlated positively with bone mineral density (BMD). Despite deficiency/insufficiency of vitamin D, low body mass index, low daily calcium intake, physical inactivity, and menarche at a later age, BSCL patients usually have normal or even high BMD...
December 2016: Medical Hypotheses
https://www.readbyqxmd.com/read/27871946/trivaric-acid-a-new-inhibitor-of-ptp1b-with-potent-beneficial-effect-on-diabetes
#9
Wenlong Sun, Bowei Zhang, Haizhou Zheng, Chunlin Zhuang, Xia Li, Xinhua Lu, Chunshan Quan, Yuesheng Dong, Zhihui Zheng, Zhilong Xiu
AIM: To screen a potential PTP1b inhibitor from the microbial origin-based compound library and to investigate the potential anti-diabetic effects of the inhibitor in vivo and determine its primary anti-diabetic mechanism in vitro and in silico. METHODS: PTP1b inhibitory activity was measured using recombination protein as the enzyme and p-NPP as the substrate. The binding of the inhibitor to PTP1b was analysed by docking in silico and confirmed by ITC experiments...
November 18, 2016: Life Sciences
https://www.readbyqxmd.com/read/27867203/epac2a-null-mice-exhibit-obesity-prone-nature-more-susceptible-to-leptin-resistance
#10
M Hwang, Y Go, J-H Park, S-K Shin, S E Song, B-C Oh, S-S Im, I Hwang, Y H Jeon, I-K Lee, S Seino, D-K Song
BACKGROUND: The exchange protein directly activated by cAMP (Epac), which is primarily involved in cAMP signaling, has been known to be essential for controlling body energy metabolism. Epac has two isoforms: Epac1 and Epac2. The function of Epac1 on obesity was unveiled using Epac1 knockout (KO) mice. However, the role of Epac2 in obesity remains unclear. METHODS: To evaluate the role of Epac2 in obesity, we used Epac2a KO mice, which is dominantly expressed in neurons and endocrine tissues...
November 21, 2016: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/27866828/high-fat-western-diet-induced-obesity-contributes-to-increased-tumor-growth-in-mouse-models-of-human-colon-cancer
#11
Ann Marie O'Neill, Christine M Burrington, Erin A Gillaspie, Darin T Lynch, Melissa J Horsman, Michael W Greene
Strong epidemiologic evidence links colon cancer to obesity. The increasing worldwide incidence of colon cancer has been linked to the spread of the Western lifestyle, and in particular consumption of a high-fat Western diet. In this study, our objectives were to establish mouse models to examine the effects of high-fat Western diet-induced obesity on the growth of human colon cancer tumor xenografts, and to examine potential mechanisms driving obesity-linked human colon cancer tumor growth. We hypothesize that mice rendered insulin resistant due to consumption of a high-fat Western diet will show increased and accelerated tumor growth...
October 20, 2016: Nutrition Research
https://www.readbyqxmd.com/read/27862922/mismatch-repair-deficiency-increases-the-transfer-of-antibiosis-and-antixenosis-properties-against-colorado-potato-beetle-in-somatic-hybrids-of-solanum-tuberosum-s-chacoense
#12
Imola Molnár, Enikő Besenyei, Ramona Thieme, Thomas Thieme, Adriana Aurori, Andreea Baricz, Horia Leonard Banciu, Elena Rakosy-Tican
BACKGROUND: Colorado potato beetle (CPB) has become the biggest enemy of cultivated potato worldwide. One of the most effective sources of resistance to CPB is Solanum chacoense, an accession with a high leptine glycoalkaloid content. The aim of our study was to assay the repellence and toxicity of S. chacoense, its somatic hybrids (SHs) and their backcross progenies (BC1 ) with potato for CPB adults and larvae. Transgenic S. chacoense, deficient in DNA mismatch repair (MMR) was also used to produce SHs, in order to increase homeologous recombination and hence introgression of wild species DNA into the potato genepool...
November 8, 2016: Pest Management Science
https://www.readbyqxmd.com/read/27860326/docosapentaenoic-acid-and-docosahexaenoic-acid-positively-associate-with-insulin-sensitivity-in-rats-fed-high-fat-and-high-fructose-diets
#13
Jiung-Pang Huang, Mei-Ling Cheng, Cheng-Yu Hung, Chao-Hung Wang, Po-Shiuan Hsieh, Ming-Shi Shiao, Jan-Kan Chen, Dai-Er Li, Li-Man Hung
BACKGROUND: We compared the insulin resistance and metabolic alterations by using a global lipidomic approach. METHODS: Rats were fed with high-fat-diet (HFD) and high-fructose-diet (HFr) for 12 weeks to induced insulin resistance syndrome. RESULTS: Rats on both diets developed of insulin resistance syndrome, characterized by hypertension, hyperlipidemia, hyperinsulinemia, impaired fasting glucose, and insulin resistance. Compared with HFr rats, nonesterified-fatty-acid was lower, and body weight and plasma insulin level were markedly higher in the HFD animals...
November 8, 2016: Journal of Diabetes
https://www.readbyqxmd.com/read/27859423/from-obesity-to-cancer-a-review-on-proposed-mechanisms
#14
REVIEW
Zoya Tahergorabi, Majid Khazaei, Mitra Moodi, Elham Chamani
Nowadays, obesity is considered as a serious and growing global health problem. It is documented that the overweight and obesity are major risk factors for a series of noncommunicable diseases, and in recent years, the obesity-cancer link has received much attention. Numerous epidemiological studies have shown that obesity is associated with increased risk of several cancer types, including colon, breast, endometrium, liver, kidney, esophagus, gastric, pancreatic, gallbladder, and leukemia, and can also lead to poorer treatment...
November 9, 2016: Cell Biochemistry and Function
https://www.readbyqxmd.com/read/27856635/micrornaa-155-deficiency-leads-to-decreased-atherosclerosis-increased-white-adipose-tissue-obesity-and-nonalcoholic-fatty-liver-disease-a-novel-mouse-model-of-obesity-paradox
#15
Anthony Virtue, Candice Johnson, Jahaira Lopez-Pastraña, Ying Shao, Hangfei Fu, Xinyuan Li, Ya-Feng Li, Ying Yin, Jietang Mai, Victor Rizzo, Michael Tordoff, Zsolt Bagi, Huimin Shan, Xiaohua Jiang, Hong Wang, Xiao-Feng Yang
Obesity paradox (OP) describes a widely observed clinical finding of improved cardiovascular fitness and survival in some overweight or obese patients. The molecular mechanisms underlying OP remain enigmatic partly due to a lack of animal models mirroring OP in patients. Using apolipoprotein E knockout (ApoE-/-) mice on high-fat (HF) diet as an atherosclerotic obesity model, we demonstrated: 1) microRNA-155 (miRNA-155, miR-155) is significantly upregulated in aortas of ApoE-/- mice; and miR-155 deficiency in ApoE-/- mice inhibits atherosclerosis; 2) ApoE-/-/miR-155-/- (DKO) mice show HF diet-induced obesity, adipocyte hypertrophy and present with nonalcoholic fatty liver disease (NAFLD); 3) DKO mice demonstrate HF diet-induced elevations of plasma leptin, resistin, fed-state and fasting insulin, increased expression of adipogenic transcription factors, but lack glucose intolerance and insulin resistance...
November 17, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27855316/a-high-fat-diet-temporarily-renders-sod1-deficient-mice-resistant-to-an-oxidative-insult
#16
Junitsu Ito, Naoki Ishii, Ryusuke Akihara, Jaeyong Lee, Toshihiro Kurahashi, Takujiro Homma, Ryo Kawasaki, Junichi Fujii
Patients with nonalcoholic fatty liver disease may subsequently develop nonalcoholic steatohepatitis after suffering from a second insult, such as oxidative stress. Aim of this study was to investigate the pathogenesis of the liver injury caused when lipids accumulate under conditions of intrinsic oxidative stress using mice that are deficient in superoxide dismutase 1 (SOD1) and the leptin receptor (Lepr). We established Sod1(-/-)::Lepr(db/db) mice and carried out analyses of four groups of genetically modified mice, namely, wild type, Sod1(-/-), Lepr(db/db) and Sod1(-/-)::Lepr(db/db) mice...
November 3, 2016: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/27847435/evaluation-of-fish-oil-rich-in-mufas-for-anti-diabetic-and-anti-inflammation-potential-in-experimental-type-2-diabetic-rats
#17
Waranya Keapai, Sopida Apichai, Doungporn Amornlerdpison, Narissara Lailerd
The advantages of monounsaturated fatty acids (MUFAs) on insulin resistance and type 2 diabetes mellitus (T2DM) have been well established. However, the molecular mechanisms of the anti-diabetic action of MUFAs remain unclear. This study examined the anti-hyperglycemic effect and explored the molecular mechanisms involved in the actions of fish oil- rich in MUFAs that had been acquired from hybrid catfish (Pangasius larnaudii×Pangasianodon hypophthalmus) among experimental type 2 diabetic rats. Diabetic rats that were fed with fish oil (500 and 1,000 mg/kg BW) for 12 weeks significantly reduced the fasting plasma glucose levels without increasing the plasma insulin levels...
November 2016: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/27842582/leptin-and-insulin-up-regulate-mir-4443-to-suppress-ncoa1-and-traf4-and-decrease-the-invasiveness-of-human-colon-cancer-cells
#18
Ari Meerson, Hila Yehuda
BACKGROUND: Obesity is a risk factor for colorectal cancer (CRC). Normal and tumor cells respond to metabolic hormones, such as leptin and insulin. Thus, obesity-associated resistance to these hormones likely leads to changes in gene expression and behavior of tumor cells. However, the mechanisms affected by leptin and insulin signaling in CRC cells remain mostly unknown. METHODS: We hypothesized that microRNAs (miRNAs) are involved in the regulation of tumorigenesis-related gene expression in CRC cells by leptin and insulin...
November 14, 2016: BMC Cancer
https://www.readbyqxmd.com/read/27832021/adiponectin-leptin-and-inflammatory-markers-in-hiv-associated-metabolic-syndrome-in-children-and-adolescents
#19
María Espiau, Diego Yeste, Antoni Noguera-Julian, Pere Soler-Palacín, Clàudi Fortunyc, Roser Ferrer, Immaculada Comas, Andrea Martín-Nalda, Ángela Deyà-Martínez, Concepció Figueras, Antonio Carrascosa
BACKGROUND: Metabolic syndrome (MetS) is more common in HIV-infected adults and children than in the general population. Adipocytokines and inflammatory markers may contribute to the pathophysiology of this condition and could be useful indices for monitoring MetS. The objective of this study was to provide information on the prevalence of MetS and investigate the role of adipocytokines and other biomarkers in this syndrome in HIV-infected pediatric patients. METHODS: A cross-sectional study was conducted between October 2013 and March 2014 in the outpatient clinics of two tertiary pediatric referral hospitals...
November 8, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27827807/kupffer-cells-facilitate-the-acute-effects-of-leptin-on-hepatic-lipid-metabolism
#20
Anantha Metlakunta, Wan Huang, Maja Stefanovic-Racic, Nikolas Dedousis, Ian Sipula, Robert M O'Doherty
Leptin has potent effects on lipid metabolism in a number of peripheral tissues. In liver, an acute leptin infusion (~120-min) stimulates hepatic fatty acid oxidation (~30%) and reduces triglycerides (TG, ~40%), effects that are dependent on PI3-kinase (PI3K) activity. In the current study we addressed the hypothesis that leptin actions on liver-resident immune cells are required for these metabolic effects. Myeloid cell-specific deletion (My) of the leptin receptor (ObR) in mice or depletion of liver Kupffer cells (KC) in rats in vivo prevented the acute effects of leptin on liver lipid metabolism, while the metabolic effects of leptin were maintained in mice lacking ObR in hepatocytes (HepObR)...
November 8, 2016: American Journal of Physiology. Endocrinology and Metabolism
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