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https://www.readbyqxmd.com/read/28535516/citrate-anticoagulation-during-continuous-renal-replacement-therapy
#1
Davide Ricci, Laura Panicali, Maria Grazia Facchini, Elena Mancini
During extracorporeal dialysis, some anticoagulation strategy is necessary to prevent the coagulation of blood. Heparin has historically been used as an anticoagulant because of its efficacy combined with low cost. However, a variable incidence of hemorrhagic complications (5-30%) has been documented in patients undergoing continuous renal replacement therapy (CRRT) with heparin as an anticoagulant. Citrate has anticoagulation properties secondary to its ability to chelate calcium, which is necessary for the coagulation cascade...
2017: Contributions to Nephrology
https://www.readbyqxmd.com/read/28533563/why-do-the-boreal-forest-ecosystems-of-northwestern-europe-differ-from-those-of-western-north-america
#2
Rudy Boonstra, Harry P Andreassen, Stan Boutin, Jan Hušek, Rolf A Ims, Charles J Krebs, Christina Skarpe, Petter Wabakken
The boreal forest is one of the largest terrestrial biomes on Earth. Conifers normally dominate the tree layer across the biome, but other aspects of ecosystem structure and dynamics vary geographically. The cause of the conspicuous differences in the understory vegetation and the herbivore-predator cycles between northwestern Europe and western North America presents an enigma. Ericaceous dwarf shrubs and 3- to 4-year vole-mustelid cycles characterize the European boreal forests, whereas tall deciduous shrubs and 10-year snowshoe hare-lynx cycles characterize the North American ones...
September 1, 2016: Bioscience
https://www.readbyqxmd.com/read/28531964/non-electron-transfer-chain-mitochondrial-defects-differently-regulate-hif-1%C3%AE-degradation-and-transcription
#3
Antonina N Shvetsova, Daniela Mennerich, Juha M Kerätär, J Kalervo Hiltunen, Thomas Kietzmann
Mitochondria are the main consumers of molecular O2 in a cell as well as an abundant source of reactive oxygen species (ROS). Both, molecular oxygen and ROS are powerful regulators of the hypoxia-inducible factor-1α-subunit (HIF-α). While a number of mechanisms in the oxygen-dependent HIF-α regulation are quite well known, the view with respect to mitochondria is less clear. Several approaches using pharmacological or genetic tools targeting the mitochondrial electron transport chain (ETC) indicated that ROS, mainly formed at the Rieske cluster of complex III of the ETC, are drivers of HIF-1α activation...
May 8, 2017: Redox Biology
https://www.readbyqxmd.com/read/28510035/ketone-bodies-as-a-possible-adjuvant-to-ketogenic-diet-in-pdhc-deficiency-but-not-in-glut1-deficiency
#4
F Habarou, N Bahi-Buisson, E Lebigot, C Pontoizeau, M T Abi-Warde, A Brassier, K H Le Quan Sang, C Broissand, S Vuillaumier-Barrot, A Roubertie, A Boutron, C Ottolenghi, P de Lonlay
OBJECTIVE: Ketogenic diet is the first line therapy for neurological symptoms associated with pyruvate dehydrogenase deficiency (PDHD) and intractable seizures in a number of disorders, including GLUT1 deficiency syndrome (GLUT1-DS). Because high-fat diet raises serious compliance issues, we investigated if oral L,D-3-hydroxybutyrate administration could be as effective as ketogenic diet in PDHD and GLUT1-DS. METHODS: We designed a partial or total progressive substitution of KD with L,D-3-hydroxybutyrate in three GLUT1-DS and two PDHD patients...
May 17, 2017: JIMD Reports
https://www.readbyqxmd.com/read/28477296/analysis-of-complexes-of-metabolites-with-europium-tetracycline-using-capillary-electrophoresis-coupled-with-laser-induced-luminescence-detection
#5
Douglas B Craig, Zachery Hiebert
Glycolysis and Krebs cycle intermediates were incubated with Eu(3+)-tetracycline and separated using capillary electrophoresis utilizing post-column laser-induced luminescence detection in a sheath flow cuvette. 3-phopshoglycerate, phosphoenolpyruvate, adenosine diphosphate, phosphate, citrate and oxaloacetate were detected at a concentration of 100 μM or lower. When all these detected metabolites were contained within the same sample it was found that they interfered with one another. Of all the metabolites, oxaloacetate showed the highest detectability...
June 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28470848/iron-catalysis-at-the-origin-of-life
#6
Eloi Camprubi, Sean F Jordan, Rafaela Vasiliadou, Nick Lane
Iron-sulphur proteins are ancient and drive fundamental processes in cells, notably electron transfer and CO2 fixation. Iron-sulphur minerals with equivalent structures could have played a key role in the origin of life. However, the 'iron-sulphur world' hypothesis has had a mixed reception, with questions raised especially about the feasibility of a pyrites-pulled reverse Krebs cycle. Phylogenetics suggests that the earliest cells drove carbon and energy metabolism via the acetyl CoA pathway, which is also replete in Fe(Ni)S proteins...
May 3, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28463938/hemorrhagic-shock-and-tissue-injury-drive-distinct-plasma-metabolome-derangements-in-swine
#7
Nathan Clendenen, Geoffrey R Nunns, Ernest E Moore, Julie A Reisz, Eduardo Gonzalez, Erik Peltz, Christopher C Silliman, Miguel Fragoso, Travis Nemkov, Matthew J Wither, Kirk Hansen, Anirban Banerjee, Hunter B Moore, Angelo DʼAlessandro
BACKGROUND: Tissue injury and hemorrhagic shock induce significant systemic metabolic reprogramming in animal models and critically injured patients. Recent expansions of the classic concepts of metabolomic aberrations in tissue injury and hemorrhage opened the way for novel resuscitative interventions based on the observed abnormal metabolic demands. We hypothesize that metabolic demands and resulting metabolic signatures in pig plasma will vary in response to isolated or combined tissue injury and hemorrhagic shock...
May 1, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28462983/alterations-in-metabolic-patterns-have-a-key-role-in-diagnosis-and-progression-of-primrose-syndrome
#8
Alberto Casertano, Paolo Fontana, Raoul C Hennekam, Marco Tartaglia, Rita Genesio, Tina Barbaro Dieber, Lucia Ortega, Lucio Nitsch, Daniela Melis
Primrose syndrome is characterized by unusual facial features, macrocephaly, intellectual disability, enlarged, and calcified external ears, sparse body hair, and distal muscle wasting. Nine patients have been described in the literature. The disorder is due to missense mutations in ZBTB20. Here we describe one newly diagnosed 18-month-old patient and provide 10 year follow-up of an earlier reported patient, highlighting the progression and complexity of the disorder. Metabolic studies showed reduced glucose tolerance with prevalence of amino acids and fatty acids catabolism, ketogenesis, and gluconeogenesis, resulting in a Krebs cycle reversion...
April 30, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28435050/the-human-krebs-cycle-2-oxoglutarate-dehydrogenase-complex-creates-an-additional-source-of-superoxide-hydrogen-peroxide-from-2-oxoadipate-as-alternative-substrate
#9
Natalia S Nemeria, Gary Gerfen, Elena Guevara, Pradeep Reddy Nareddy, Michal Szostak, Frank Jordan
Recently, we reported that the human 2-oxoglutarate dehydrogenase (hE1o) component of the 2-oxoglutarate dehydrogenase complex (OGDHc) could produce the reactive oxygen species superoxide and hydrogen peroxide (detected by chemical means) from its substrate 2-oxoglutarate (OG), most likely concurrently with one-electron oxidation by dioxygen of the thiamin diphosphate (ThDP)-derived enamine intermediate to a C2α-centered radical (detected by Electron Paramagnetic Resonance) [Nemeria et al., 2014 [17]; Ambrus et al...
April 21, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28429330/growth-kinetics-fatty-acid-composition-and-metabolic-activity-changes-of-crypthecodinium-cohnii-under-different-nitrogen-source-and-concentration
#10
Waseem Safdar, Muhammad Shamoon, Xinyi Zan, Junaid Haider, Hafiz Rizwan Sharif, Muhammad Shoaib, Yuanda Song
The effect of varying concentrations of the nitrogen source on the growth kinetics, lipid accumulation, lipid and DHA productivity, and fatty acid composition of C. cohnii was elucidated. Growth of C. cohnii was in three distinct growth stages: cell growth, lipid accumulation and a final lipid turnover stage. Most of lipids were accumulated in lipid accumulation stage (48-120 h) though, slow growth rate was observed during this stage. NaNO3 supported significantly higher lipid content (26.9% of DCW), DHA content (0...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28424233/cluh-couples-mitochondrial-distribution-to-the-energetic-and-metabolic-status
#11
Jamal Wakim, David Goudenege, Rodolphe Perrot, Naig Gueguen, Valerie Desquiret-Dumas, Juan Manuel Chao de la Barca, Ilaria Dalla Rosa, Florence Manero, Morgane Le Mao, Stephanie Chupin, Arnaud Chevrollier, Vincent Procaccio, Dominique Bonneau, David C Logan, Pascal Reynier, Guy Lenaers, Salim Khiati
Mitochondrial dynamics and distribution are critical in supplying ATP in response to energy demand. CLUH is a protein involved in mitochondrial distribution, whose dysfunction leads to mitochondrial clustering, the metabolic consequences of which remain unknown. To gain insight into the role of CLUH on mitochondrial energy production and cellular metabolism, we have generated CLUH knockout cells using CRISPR/Cas9. Mitochondrial clustering was associated with a smaller cell size, and with decreased abundance of respiratory complexes, resulting in OXPHOS defects...
April 19, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28423352/prospective-serum-metabolomic-profile-of-prostate-cancer-by-size-and-extent-of-primary-tumor
#12
Jiaqi Huang, Alison M Mondul, Stephanie J Weinstein, Edward D Karoly, Joshua N Sampson, Demetrius Albanes
Two recent investigations found serum lipid and energy metabolites related to aggressive prostate cancer up to 20 years prior to diagnosis. To elucidate whether those metabolomic profiles represent etiologic or tumor biomarker signals, we prospectively examined serum metabolites of prostate cancer cases by size and extent of primary tumors in a nested case-control analysis in the ATBC Study cohort that compared cases diagnosed with T2 (n = 71), T3 (n = 51), or T4 (n = 15) disease to controls (n = 200). Time from fasting serum collection to diagnosis averaged 10 years (range 1-20)...
April 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28419197/inhibition-of-sarcolemmal-fat-cd36-by-sulfo-n-succinimidyl-oleate-rapidly-corrects-metabolism-and-restores-function-in-the-diabetic-heart-following-hypoxia-reoxygenation
#13
Latt S Mansor, Maria da Luz Sousa Fialho, Georgina Yea, Will A Coumans, James A West, Matthew Kerr, Carolyn A Carr, Joost J F P Luiken, Jan F C Glatz, Rhys D Evans, Julian L Griffin, Damian J Tyler, Kieran Clarke, Lisa C Heather
Aims: The type 2 diabetic heart oxidizes more fat and less glucose, which can impair metabolic flexibility and function. Increased sarcolemmal fatty acid translocase (FAT/CD36) imports more fatty acid into the diabetic myocardium, feeding increased fatty acid oxidation and elevated lipid deposition. Unlike other metabolic modulators that target mitochondrial fatty acid oxidation, we proposed that pharmacologically inhibiting fatty acid uptake, as the primary step in the pathway, would provide an alternative mechanism to rebalance metabolism and prevent lipid accumulation following hypoxic stress...
June 1, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28418387/mitochondria-are-the-powerhouses-of-immunity
#14
REVIEW
Evanna L Mills, Beth Kelly, Luke A J O'Neill
Recent evidence indicates that mitochondria lie at the heart of immunity. Mitochondrial DNA acts as a danger-associated molecular pattern (DAMP), and the mitochondrial outer membrane is a platform for signaling molecules such as MAVS in RIG-I signaling, and for the NLRP3 inflammasome. Mitochondrial biogenesis, fusion and fission have roles in aspects of immune-cell activation. Most important, Krebs cycle intermediates such as succinate, fumarate and citrate engage in processes related to immunity and inflammation, in both innate and adaptive immune cells...
April 18, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28412654/nigella-sativa-a-traditional-tunisian-herbal-medicine-attenuates-bleomycin-induced-pulmonary-fibrosis-in-a-rat-model
#15
Anouar Abidi, Alexandre Robbe, Nadia Kourda, Saloua Ben Khamsa, Alexandre Legrand
The present study investigated the effects of Nigella sativa oil (NSO) on bleomycin (BLM)-induced lung fibrosis in rats. The rat model of pulmonary fibrosis (PF) was established by intratracheal instillation of BLM, and the effect of 1ml/kg oral NSO treatment once daily observed. The effect of NSO was studied over a period of 50daysusing (1)H RMN analysis on the urine and broncho alveolar lavage fluid (Balf) of the rats. Histopathological (inflammation and fibrosis) and immunohistochemical (TGF-β1 density) changes were evaluated...
June 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28393699/approaches-of-the-transcriptomic-analysis-in-astrocytes-potential-pharmacological-targets
#16
George E Barreto, Rosa M Gómez, Rosa Helena Bustos, Diego A Forero, Gjumrakch Aliev, Jerzy Leszek, Valentina Echeverria, Janneth Gonzalez
Astrocytes are important glial cells involved in the ionic regulation of the extracellular fluid in the Central Nervous System (CNS), the formation of the blood brain barrier (BBB) and the support to neurons for the maintaining of the Krebs cycle intermediaries. Even though these cells are known to be important for the brain functioning, several of their functions and their development have not been fully elucidated. In this context, identifying the algorithms used for their analysis plays a pivotal role in the development of new strategies in the study of astrocytes...
April 6, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28388555/targeting-mantle-cell-lymphoma-metabolism-and-survival-through-simultaneous-blockade-of-mtor-and-nuclear-transporter-exportin-1
#17
Kazumasa Sekihara, Kaori Saitoh, Lina Han, Stefan Ciurea, Shinichi Yamamoto, Mika Kikkawa, Saiko Kazuno, Hikari Taka, Naoko Kaga, Hajime Arai, Takashi Miida, Michael Andreeff, Marina Konopleva, Yoko Tabe
Mantle cell lymphoma (MCL) is an aggressive B-cell lymphoma with poor prognosis, characterized by aberrant expression of growth-regulating and oncogenic effectors and requiring novel anticancer strategies. The nuclear transporter exportin-1 (XPO1) is highly expressed in MCL and is associated with its pathogenesis. mTOR signaling, a central regulator of cell metabolism, is frequently activated in MCL and is also an important therapeutic target in this cancer. This study investigated the antitumor effects and molecular/metabolic changes induced by the combination of the small-molecule selective inhibitor XPO1 inhibitor KPT-185 and the dual mTORC1/2 kinase inhibitor AZD-2014 on MCL cells...
May 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28379214/impact-of-recurrent-hypoglycemic-stress-on-hindbrain-a2-nerve-cell-energy-metabolism-and-catecholamine-biosynthesis-modulation-by-estradiol
#18
Pratistha Tamrakar, Karen P Briski
It is unclear if habituation of hindbrain A2 metabolo‑sensory neurons to recurrent insulin-induced hypoglycemia (RIIH) correlates with estradiol-dependent adjustments in energy metabolism that favor positive energy balance. Laser-microdissected A2 cells from estradiolor oil-implanted ovariectomized female rats were analyzed by Western blot to assess effects of three prior daily insulin injections on basal and hypoglycemic patterns of catecholamine biosynthetic enzyme dopamine-beta-hydroxylase (DβH) and rate-limiting energy pathway enzyme protein expression...
2017: Acta Neurobiologiae Experimentalis
https://www.readbyqxmd.com/read/28371363/diurnal-expression-of-proteins-in-the-retina-of-the-blind-cone-rod-homeobox-crx-mouse-and-the-129-sv-mouse-a-proteomic-study
#19
Morten Møller, Martin Fredensborg Rath, Maja Ludvigsen, Bent Honoré, Henrik Vorum
PURPOSE: The vertebrate retina contains a circadian clock participating in adaptations to day and night vision. This peripheral clock is independent of the master clock in the suprachiasmatic nucleus (SCN). The retinal clock is located in several cell types, including the photoreceptors. To investigate the role of the circadian clock of the photoreceptor cells in regulation of retinal protein rhythms, we analysed diurnal protein expression in the photoreceptor-deficient cone-rod homeobox knockout mouse (Crx(-/-) ) and the 129/Sv mouse...
March 28, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28363960/genetic-in-stability-of-2-6-dichlorobenzamide-bam-catabolism-in-aminobacter-sp-msh1-biofilms-under-carbon-starved-conditions
#20
Benjamin Horemans, Bart Raes, Hannelore Brocatus, Jeroen T'Syen, Caroline Rombouts, Lynn Vanhaecke, Johan Hofkens, Dirk Springael
Aminobacter sp. MSH1 grows on and mineralizes the groundwater micropollutant 2,6-dichlorobenzamide (BAM) and is of interest for BAM removal in drinking water treatment plants (DWTPs). The BAM-catabolic genes in MSH1 are located on plasmid pBAM1 carrying bbdA encoding the conversion of BAM to 2,6-dichlorobenzoic acid (2,6-DCBA) (BbdA(+) phenotype) and plasmid pBAM2 carrying gene clusters encoding the conversion of 2,6-DCBA to TCA cycle intermediates (Dcba(+) phenotype). Indications exist that MSH1 loses easily its BAM-catabolic phenotype...
March 31, 2017: Applied and Environmental Microbiology
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