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https://www.readbyqxmd.com/read/28330272/biodegradation-of-endocrine-disruptor-dibutyl-phthalate-dbp-by-a-newly-isolated-methylobacillus-sp-v29b-and-the-dbp-degradation-pathway
#1
Vinay Kumar, S S Maitra
Bacteria of the genus Methylobacillus are methanotrophs, a metabolic feature that is widespread in the phylum Proteobacteria. The study demonstrates the isolation and characterization of a newly isolated Methylobacillus sp. V29b. which grows on methanol, protocatechuate, monobutyl phthalate, dibutyl phthalate, diethyl phthalate, benzyl butyl phthalate, dioctyl phthalate and diisodecyl phthalate. Methylobacillus sp. V29b was characterized with scanning electron microscopy, transmission electron microscopy, Gram staining, antibiotics sensitivity tests and biochemical characterization...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330119/degradation-of-fipronil-by-stenotrophomonas-acidaminiphila-isolated-from-rhizospheric-soil-of-zea-mays
#2
Shivani Uniyal, Rashmi Paliwal, R K Sharma, J P N Rai
Fipronil is a widely used insecticide in agriculture and can cause potential health hazards to non-target soil invertebrates and nearby aquatic systems. In the present study, a fipronil degrading bacterium was isolated from fipronil contaminated soil, i.e. rhizospheric zone of Zea mays. Morphological, biochemical and molecular characterization of strain indicated that it clearly belongs to Stenotrophomonas acidaminiphila (accession no. KJ396942). A three-factor Box-Behnken experimental design combined with response surface modeling was employed to predict the optimum conditions for fipronil degradation...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28329766/complex-pectin-metabolism-by-gut-bacteria-reveals-novel-catalytic-functions
#3
Didier Ndeh, Artur Rogowski, Alan Cartmell, Ana S Luis, Arnaud Baslé, Joseph Gray, Immacolata Venditto, Jonathon Briggs, Xiaoyang Zhang, Aurore Labourel, Nicolas Terrapon, Fanny Buffetto, Sergey Nepogodiev, Yao Xiao, Robert A Field, Yanping Zhu, Malcolm A O'Neill, Breeanna R Urbanowicz, William S York, Gideon J Davies, D Wade Abbott, Marie-Christine Ralet, Eric C Martens, Bernard Henrissat, Harry J Gilbert
The metabolism of carbohydrate polymers drives microbial diversity in the human gut microbiota. It is unclear, however, whether bacterial consortia or single organisms are required to depolymerize highly complex glycans. Here we show that the gut bacterium Bacteroides thetaiotaomicron uses the most structurally complex glycan known: the plant pectic polysaccharide rhamnogalacturonan-II, cleaving all but 1 of its 21 distinct glycosidic linkages. The deconstruction of rhamnogalacturonan-II side chains and backbone are coordinated to overcome steric constraints, and the degradation involves previously undiscovered enzyme families and catalytic activities...
March 22, 2017: Nature
https://www.readbyqxmd.com/read/28329687/impact-of-dietary-interventions-on-noncoding-rna-networks-and-mrnas-encoding-chromatin-related-factors
#4
Christopher D Green, Yi Huang, Xiaoyang Dou, Liu Yang, Yong Liu, Jing-Dong J Han
Dietary interventions dramatically affect metabolic disease and lifespan in various aging models. Here, we profiled liver microRNA (miRNA), coding, and long non-coding RNA (lncRNA) expression by high-throughput deep sequencing in mice across multiple energy intake and expenditure interventions. Strikingly, three dietary intervention network design patterns were uncovered: (1) lifespan-extending interventions largely repressed the expression of miRNAs, lncRNAs, and transposable elements; (2) protein-coding mRNAs with expression positively correlated with long lifespan are highly targeted by miRNAs; and (3) miRNA-targeting interactions mainly target chromatin-related functions...
March 21, 2017: Cell Reports
https://www.readbyqxmd.com/read/28329397/resveratrol-improves-vascular-function-and-mitochondrial-number-but-not-glucose-metabolism-in-older-adults
#5
Rena M Pollack, Nir Barzilai, Valentin Anghel, Ameya S Kulkarni, Aaron Golden, Pilib O'Broin, David A Sinclair, Michael S Bonkowski, Alexander J Coleville, Danielle Powell, Sharon Kim, Ruin Moaddel, Daniel Stein, Kehao Zhang, Meredith Hawkins, Jill P Crandall
Background: Resveratrol, a plant-derived polyphenol, has been reported to improve glucose metabolism and vascular function and to extend life span in animal models, but studies in humans have been inconclusive. Methods: In a randomized, double-blind crossover study, we treated older glucose-intolerant adults (n = 30) with resveratrol (2-3 g/daily) or placebo, each for 6 weeks. A standard mixed-meal test was used to assess insulin sensitivity (Matsuda index) and secretion (C-peptide deconvolution) and vascular function by reactive hyperemia peripheral arterial tonometry...
March 16, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28329353/pre-diagnosis-sleep-duration-napping-and-mortality-among-colorectal-cancer-survivors-in-a-large-us-cohort
#6
Qian Xiao, Hannah Arem, Ruth Pfeiffer, Charles Matthews
Study Objectives: Pre-diagnosis lifestyle factors can influence colorectal cancer (CRC) survival. Sleep deficiency is linked to metabolic dysfunction and chronic inflammation, which may contribute to higher mortality from cardiometabolic conditions and promote tumor progression. We hypothesized that pre-diagnosis sleep deficiency would be associated with poor CRC survival. No previous study has examined either nighttime sleep or daytime napping in relation to survival among men and women diagnosed with CRC...
February 9, 2017: Sleep
https://www.readbyqxmd.com/read/28329220/prolonged-exposures-to-intermittent-hypoxia-promote-visceral-white-adipose-tissue-inflammation-in-a-murine-model-of-severe-sleep-apnea-effect-of-normoxic-recovery
#7
Alex Gileles-Hillel, Isaac Almendros, Abdelnaby Khalyfa, Recep Nigdelioglu, Zhuanhong Qiao, Robert B Hamanaka, Gökhan M Mutlu, Mahzad Akbarpour, David Gozal
Study Objectives: Increased visceral white adipose tissue (vWAT) mass results in infiltration of inflammatory macrophages that drive inflammation and insulin resistance. Patients with obstructive sleep apnea (OSA) suffer from increased prevalence of obesity, insulin resistance and metabolic syndrome. Murine models of intermittent hypoxia (IH) mimicking moderate-severe OSA manifest insulin resistance following short-term IH. We examined in mice the effect of long-term IH on the inflammatory cellular changes within vWAT, and the potential effect of normoxic recovery (IH-R)...
December 22, 2016: Sleep
https://www.readbyqxmd.com/read/28329148/myocardial-energy-metabolism-and-ultrastructure-with-polarizing-and-depolarizing-cardioplegia-in-a-porcine-model%C3%A2
#8
Terje Aass, Lodve Stangeland, David J Chambers, Seth Hallström, Christine Rossmann, Bruno K Podesser, Malte Urban, Knut Nesheim, Rune Haaverstad, Knut Matre, Ketil Grong
OBJECTIVES: This study investigated whether the novel St. Thomas' Hospital polarizing cardioplegic solution (STH-POL) with esmolol/adenosine/magnesium offers improved myocardial protection by reducing demands for high-energy phosphates during cardiac arrest compared to the depolarizing St. Thomas' Hospital cardioplegic solution No 2 (STH-2). METHODS: Twenty anaesthetised pigs on tepid cardiopulmonary bypass were randomized to cardiac arrest for 60 min with antegrade freshly mixed, repeated, cold, oxygenated STH-POL or STH-2 blood cardioplegia every 20 min...
March 2, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28329091/association-between-sleep-timing-obesity-diabetes-the-hispanic-community-health-study-study-of-latinos-hchs-sol-cohort-study-sleep-timing-obesity-and-diabetes
#9
Kristen L Knutson, Donghong Wu, Sanjay R Patel, Jose S Loredo, Susan Redline, Jianwen Cai, Linda C Gallo, Yasmin Mossavar-Rahmani, Alberto R Ramos, Yanping Teng, Martha L Daviglus, Phyllis C Zee
Study Objectives: Recent studies implicate inadequate sleep duration and quality in metabolic disease. Fewer studies have examined the timing of sleep, which may be important because of its potential impact on circadian rhythms of metabolic function. We examined the association between sleep timing and metabolic risk among Hispanic/Latino adults. Methods.: Cross-sectional data from community-based study of 13,429 participants aged 18-74 years. People taking diabetes medications were excluded...
January 28, 2017: Sleep
https://www.readbyqxmd.com/read/28329079/sleep-duration-and-cardiometabolic-risk-among-chinese-school-aged-children-do-adipokines-play-a-mediating-role
#10
Lujiao Li, Junling Fu, Xin Ting Yu, Ge Li, Lu Xu, Jinghua Yin, Hong Cheng, Dongqing Hou, Xiaoyuan Zhao, Shan Gao, Wenhui Li, Changhong Li, Struan F A Grant, Mingyao Li, Yi Xiao, Jie Mi, Ming Li
Objective: To assess the associations between sleep duration and cardiometabolic risk factors in Chinese school-aged children and to explore the possible mediating role of adipokines. Methods: Sleep duration was collected in 3,166 children from the Beijing Child and Adolescent Metabolic Syndrome study. Glucose homeostasis and other cardiometabolic risk factors were assessed. Serum adipokines including leptin, total and high-molecular-weight (HMW) adiponectin, resistin, fibroblast growth factor 21 (FGF21) and retinol binding protein 4 (RBP4) were determined...
March 9, 2017: Sleep
https://www.readbyqxmd.com/read/28328927/effect-of-phosphorus-stress-on-microcystis-aeruginosa-growth-and-phosphorus-uptake
#11
Sajeela Ghaffar, R Jan Stevenson, Zahiruddin Khan
This study was designed to advance understanding of phosphorus regulation of Microcystis aeruginosa growth, phosphorus uptake and storage in changing phosphorus (P) conditions as would occur in lakes. We hypothesized that Microcystis growth and nutrient uptake would fit classic models by Monod, Droop, and Michaelis-Menten in these changing conditions. Microcystis grown in luxury nutrient concentrations was transferred to treatments with phosphorus concentrations ranging from 0-256 μg P∙L-1 and luxury nitrogen...
2017: PloS One
https://www.readbyqxmd.com/read/28328386/walking-training-and-cortisol-to-dhea-s-ratio-in-postmenopause-an-intervention-study
#12
Andrea Di Blasio, Pascal Izzicupo, Angela Di Baldassarre, Sabina Gallina, Ines Bucci, Cesidio Giuliani, Serena Di Santo, Angelo Di Iorio, Patrizio Ripari, Giorgio Napolitano
The literature indicates that the plasma cortisol-to-dihydroepiandrosterone-sulfate (DHEA-S) ratio is a marker of health status after menopause, when a decline in both estrogens and DHEA-S, and an increase in cortisol occur. An increase in the cortisol-to-DHEA-S ratio has been positively correlated with metabolic syndrome, all-cause mortality, cancer and other diseases. The aim of this study was to investigate the effects of a walking program on the plasma cortisol-to-DHEA-S ratio in postmenopausal women. Fifty-one postmenopausal women participated in a 13-week supervised walking program, in the metropolitan area of Pescara (Italy), from June to September 2013...
March 22, 2017: Women & Health
https://www.readbyqxmd.com/read/28327659/the-immunosuppressant-mycophenolic-acid-alters-nucleotide-and-lipid-metabolism-in-an-intestinal-cell-model
#13
Svenja Heischmann, Monika Dzieciatkowska, Kirk Hansen, Dieter Leibfritz, Uwe Christians
The study objective was to elucidate the molecular mechanisms underlying the negative effects of mycophenolic acid (MPA) on human intestinal cells. Effects of MPA exposure and guanosine supplementation on nucleotide concentrations in LS180 cells were assessed using liquid chromatography-mass spectrometry. Proteomics analysis was carried out using stable isotope labeling by amino acids in cell culture combined with gel-based liquid chromatography-mass spectrometry and lipidome analysis using (1)H nuclear magnetic resonance spectroscopy...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28327588/pharmacological-inhibition-of-adipose-triglyceride-lipase-corrects-high-fat-diet-induced-insulin-resistance-and-hepatosteatosis-in-mice
#14
Martina Schweiger, Matthias Romauch, Renate Schreiber, Gernot F Grabner, Sabrina Hütter, Petra Kotzbeck, Pia Benedikt, Thomas O Eichmann, Sohsuke Yamada, Oskar Knittelfelder, Clemens Diwoky, Carina Doler, Nicole Mayer, Werner De Cecco, Rolf Breinbauer, Robert Zimmermann, Rudolf Zechner
Elevated circulating fatty acids (FAs) contribute to the development of obesity-associated metabolic complications such as insulin resistance (IR) and non-alcoholic fatty liver disease (NAFLD). Hence, reducing adipose tissue lipolysis to diminish the mobilization of FAs and lower their respective plasma concentrations represents a potential treatment strategy to counteract obesity-associated disorders. Here we show that specific inhibition of adipose triglyceride lipase (Atgl) with the chemical inhibitor, Atglistatin, effectively reduces adipose tissue lipolysis, weight gain, IR and NAFLD in mice fed a high-fat diet...
March 22, 2017: Nature Communications
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
#15
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/28326890/functional-and-molecular-correlates-following-single-and-repeated-rat-closed-head-concussion-indices-of-vulnerability-following-brain-injury
#16
Andrea Mountney, Angela Boutte, Casandra M Cartagena, William J Flerlage, David Johnson, Chanyang Rho, Xi-Chun M Lu, Angela M Yarnell, Sean R Marcsisin, Jason Sousa, Chau Vuong, Victor E Zottig, Lai Yee Leung, Ying Deng-Bryant, Janice Gilsdorf, Frank C Tortella, Deborah A Shear
Closed-head concussive injury is one of the most common causes of traumatic brain injury (TBI). Isolated concussions frequently produce acute neurological impairments; however, individuals typically recover spontaneously within a short time frame. In contrast, brain injuries resulting from multiple concussions can result in cumulative damage and elevated risk of developing chronic brain pathologies, including chronic traumatic encephalopathy (CTE). Increased attention has focused on identification of diagnostic markers that can prognostically serve as indices of brain health after injury, revealing the temporal profile of vulnerability to a second insult...
March 22, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28326339/glucose-dependent-insulinotropic-polypeptide-gip-and-gip-receptor-gipr-genes-an-association-analysis-of-polymorphisms-and-bone-in-young-and-elderly-women
#17
Gaurav Garg, Fiona E McGuigan, Jitender Kumar, Holger Luthman, Valeriya Lyssenko, Kristina Akesson
INTRODUCTION: The gastro-intestinal hormone glucose-dependent insulinotropic polypeptide (GIP) potentiates glucose-induced insulin secretion, with bone anabolic effects through GIP receptor (GIPR) in animal models. We explore its potential in humans by analyzing association between polymorphisms (SNPs) in the GIP and GIPR genes with bone phenotypes in young and elderly women. METHODS: Association between GIP (rs2291725) and GIPR (rs10423928) and BMD, bone mineral content (BMC), bone microarchitecture, fracture and body composition was analyzed in the OPRA (75y, n = 1044) and PEAK-25 (25y; n = 1061) cohorts and serum-GIP in OPRA...
June 2016: Bone Reports
https://www.readbyqxmd.com/read/28326296/association-between-sarcopenic-obesity-and-metabolic-syndrome-in-postmenopausal-women-a-cross-sectional-study-based-on-the-korean-national-health-and-nutritional-examination-surveys-from-2008-to-2011
#18
Sun-Young Kang, Gyeong Eun Lim, Yang Keun Kim, Hye Won Kim, Kayoung Lee, Tae-Jin Park, Jinseung Kim
BACKGROUND: Menopause contributes to an increase in visceral fat mass and a decrease in muscle protein synthesis. Therefore, we performed this study to examine their relationship how effect the changes of body composition as obesity and sarcopenia on metabolic syndrome (MS) as a predictor of cardiovascular disease in postmenopausal women. METHODS: Using data from the Korean National Health and Nutrition Examination Survey (KNHANES) from 2008 to 2011, we estimated that 4,183 postmenopausal women underwent dual energy X-ray absorptiometry scans...
February 2017: Journal of Bone Metabolism
https://www.readbyqxmd.com/read/28326087/arabidopsis-nac-transcription-factor-jungbrunnen1-exerts-conserved-control-over-gibberellin-and-brassinosteroid-metabolism-and-signaling-genes-in-tomato
#19
Sara Shahnejat-Bushehri, Annapurna D Allu, Nikolay Mehterov, Venkatesh P Thirumalaikumar, Saleh Alseekh, Alisdair R Fernie, Bernd Mueller-Roeber, Salma Balazadeh
The Arabidopsis thaliana NAC transcription factor JUNGBRUNNEN1 (AtJUB1) regulates growth by directly repressing GA3ox1 and DWF4, two key genes involved in gibberellin (GA) and brassinosteroid (BR) biosynthesis, respectively, leading to GA and BR deficiency phenotypes. AtJUB1 also reduces the expression of PIF4, a bHLH transcription factor that positively controls cell elongation, while it stimulates the expression of DELLA genes, which are important repressors of growth. Here, we extend our previous findings by demonstrating that AtJUB1 induces similar GA and BR deficiency phenotypes and changes in gene expression when overexpressed in tomato (Solanum lycopersicum)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28325918/robust-analysis-of-fluxes-in-genome-scale-metabolic-pathways
#20
Michael MacGillivray, Amy Ko, Emily Gruber, Miranda Sawyer, Eivind Almaas, Allen Holder
Constraint-based optimization, such as flux balance analysis (FBA), has become a standard systems-biology computational method to study cellular metabolisms that are assumed to be in a steady state of optimal growth. The methods are based on optimization while assuming (i) equilibrium of a linear system of ordinary differential equations, and (ii) deterministic data. However, the steady-state assumption is biologically imperfect, and several key stoichiometric coefficients are experimentally inferred from situations of inherent variation...
March 21, 2017: Scientific Reports
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