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https://www.readbyqxmd.com/read/27899136/exposure-of-the-mosquito-vector-culex-pipiens-to-the-malaria-parasite-plasmodium-relictum-effect-of-infected-blood-intake-on-immune-and-antioxidant-defences-fecundity-and-survival
#1
Jessica Delhaye, Consolée Aletti, Olivier Glaizot, Philippe Christe
BACKGROUND: The intake of a Plasmodium-infected blood meal may affect mosquito physiology and a series of trade-offs may occur, in particular between immune defences, reproduction and self-maintenance. We evaluated the cost of exposure to Plasmodium in the mosquito vector by investigating the effect of exposure on fecundity and survival and the implication of immune and antioxidant defences in mediating this cost. METHODS: We used the natural Culex pipiens-Plasmodium relictum association...
November 29, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27886975/in-vitro-metabolic-engineering-of-bioelectricity-generation-by-the-complete-oxidation-of-glucose
#2
Zhiguang Zhu, Y-H Percival Zhang
The direct generation of electricity from the most abundant renewable sugar, glucose, is an appealing alternative to the production of liquid biofuels and biohydrogen. However, enzyme-catalyzed bioelectricity generation from glucose suffers from low yields due to the incomplete oxidation of the six-carbon compound glucose via one or few enzymes. Here, we demonstrate a synthetic ATP- and CoA-free 12-enzyme pathway to implement the complete oxidation of glucose in vitro. This pathway is comprised of glucose phosphorylation via polyphosphate glucokinase, NADH generation catalyzed by glucose 6-phosphate dehydrogenase (G6PDH) and 6-phosphogluconate dehydrogenase (6PGDH), electron transfer from NADH to the anode, and glucose 6-phosphate regeneration via the non-oxidative pentose phosphate pathway and gluconeogenesis...
November 23, 2016: Metabolic Engineering
https://www.readbyqxmd.com/read/27884717/activity-based-evaluation-of-a-traditional-ayurvedic-medicinal-plant-saraca-asoca-roxb-de-wilde-flowers-as-estrogenic-agents-using-ovariectomized-rat-model
#3
Gauri Swar, Sunita Shailajan, Sasikumar Menon
ETHNOPHARMACOLOGICAL RELEVANCE: Saraca asoca (Roxb.) de Wilde, Ashok, is a popular traditional plant used for gynecological disorders. In India, the juice of Ashok flowers is traditionally consumed as a tonic by women in case of uterine disorders. But despite the use, its estrogenic potency is not yet evaluated and thus lacks the scientific recognition and acclaim. AIM OF THE STUDY: This study is designed to investigate the estrogenic potential of standardized ethanolic extract of Saraca asoca flowers (SAF) using ovariectomized (OVX) female albino Wistar rat model...
November 22, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27880809/molecular-analysis-of-glucose-6-phosphate-dehydrogenase-gene-mutations-in-bangladeshi-individuals
#4
Suprovath Kumar Sarker, Md Tarikul Islam, Grace Eckhoff, Mohammad Amir Hossain, Syeda Kashfi Qadri, A K M Muraduzzaman, Golam Sarower Bhuyan, Mohammod Shahidullah, Mohammad Abdul Mannan, Sarabon Tahura, Manzoor Hussain, Shahida Akhter, Nazmun Nahar, Tahmina Shirin, Firdausi Qadri, Kaiissar Mannoor
Glucose-6-phosphate dehydrogenase (G6PD) deficiency is a common X-linked human enzyme defect of red blood cells (RBCs). Individuals with this gene defect appear normal until exposed to oxidative stress which induces hemolysis. Consumption of certain foods such as fava beans, legumes; infection with bacteria or virus; and use of certain drugs such as primaquine, sulfa drugs etc. may result in lysis of RBCs in G6PD deficient individuals. The genetic defect that causes G6PD deficiency has been identified mostly as single base missense mutations...
2016: PloS One
https://www.readbyqxmd.com/read/27870966/biochemical-effects-of-fipronil-and-its-metabolites-on-lipid-peroxidation-and-enzymatic-antioxidant-defense-in-tadpoles-eupemphix-nattereri-leiuperidae
#5
Hortênsia S Gripp, Juliane S Freitas, Eduardo A Almeida, Márcia C Bisinoti, Altair B Moreira
Amphibians are very sensitive to environmental change and pollution because they have both aquatic and terrestrial life cycle stages and high skin permeability. Particularly during the larval stages, when these animals are restricted to small, transient ponds, exposure to high concentrations of pesticides is inevitable in agricultural areas. Given that pesticide application increases during the summer, which coincides with the reproductive season and the occurrence of most neotropical tadpoles in their natural environment, strong indications exist that tadpoles are developing in contaminated ponds...
November 18, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27825349/an-easy-and-efficient-permeabilization-protocol-for-in-vivo-enzyme-activity-assays-in-cyanobacteria
#6
Randi Engelberth Rasmussen, Simon Matthé Erstad, Erick Miguel Ramos-Martinez, Lorenzo Fimognari, Alice Jara De Porcellinis, Yumiko Sakuragi
BACKGROUND: Cyanobacteria are photosynthetic bacteria that thrive in diverse ecosystems and play major roles in the global carbon cycle. The abilities of cyanobacteria to fix atmospheric CO2 and to allocate the fixed carbons to chemicals and biofuels have attracted growing attentions as sustainable microbial cell factories. Better understanding of the activities of enzymes involved in the central carbon metabolism would lead to increasing product yields. Currently cell-free lysates are the most widely used method for determination of intracellular enzyme activities...
November 8, 2016: Microbial Cell Factories
https://www.readbyqxmd.com/read/27818934/glucose-6-phosphate-dehydrogenase-contributes-to-the-regulation-of-glucose-uptake-in-skeletal-muscle
#7
Robert S Lee-Young, Nolan J Hoffman, Kate T Murphy, Darren C Henstridge, Dorit Samocha-Bonet, Andrew L Siebel, Peter Iliades, Borivoj Zivanovic, Yet H Hong, Timothy D Colgan, Michael J Kraakman, Clinton R Bruce, Paul Gregorevic, Glenn K McConell, Gordon S Lynch, Grant R Drummond, Bronwyn A Kingwell, Jerry R Greenfield, Mark A Febbraio
OBJECTIVE: The development of skeletal muscle insulin resistance is an early physiological defect, yet the intracellular mechanisms accounting for this metabolic defect remained unresolved. Here, we have examined the role of glucose-6-phosphate dehydrogenase (G6PDH) activity in the pathogenesis of insulin resistance in skeletal muscle. METHODS: Multiple mouse disease states exhibiting insulin resistance and glucose intolerance, as well as obese humans defined as insulin-sensitive, insulin-resistant, or pre-diabetic, were examined...
November 2016: Molecular Metabolism
https://www.readbyqxmd.com/read/27717462/plastidic-p2-glucose-6p-dehydrogenase-from-poplar-is-modulated-by-thioredoxin-m-type-distinct-roles-of-cysteine-residues-in-redox-regulation-and-nadph-inhibition
#8
Manuela Cardi, Mirko Zaffagnini, Alessia De Lillo, Daniela Castiglia, Kamel Chibani, José Manuel Gualberto, Nicolas Rouhier, Jean-Pierre Jacquot, Sergio Esposito
A cDNA coding for a plastidic P2-type G6PDH isoform from poplar (Populus tremula x tremuloides) has been used to express and purify to homogeneity the mature recombinant protein with a N-terminus His-tag. The study of the kinetic properties of the recombinant enzyme showed an in vitro redox sensing modulation exerted by reduced DTT. The interaction with thioredoxins (TRXs) was then investigated. Five cysteine to serine variants (C145S - C175S - C183S - C195S - C242S) and a variant with a double substitution for Cys(175) and Cys(183) (C175S/C183S) have been generated, purified and biochemically characterized in order to investigate the specific role(s) of cysteines in terms of redox regulation and NADPH-dependent inhibition...
November 2016: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/27703849/atlantic-salmon-salmo-salar-require-increased-dietary-levels-of-b-vitamins-when-fed-diets-with-high-inclusion-of-plant-based-ingredients
#9
Gro-Ingunn Hemre, Erik-Jan Lock, Pål Asgeir Olsvik, Kristin Hamre, Marit Espe, Bente Elisabeth Torstensen, Joana Silva, Ann-Cecilie Hansen, Rune Waagbø, Johan S Johansen, Monica Sanden, Nini H Sissener
Aiming to re-evaluate current recommendations for nutrient supplementations when Atlantic salmon are fed diets based on plant ingredients, two regression experiments, with parr and post-smolt, were conducted. A control diet was included to evaluate if ingredients supplied sufficient nutrients without any added nutrient package (NP). The nutrient package consisted of vitamins B, C, E, minerals, cholesterol, methionine, taurine and histidine. This paper focus on B-vitamins. In parr, growth, health and welfare parameters responded on NP additions, but this was not observed in the seawater stage...
2016: PeerJ
https://www.readbyqxmd.com/read/27638050/redox-status-in-a-model-of-cancer-stem-cells
#10
Mattia Zaccarin, Valentina Bosello-Travain, Maria Luisa Di Paolo, Marco Falda, Matilde Maiorino, Giovanni Miotto, Stefano Piccolo, Antonella Roveri, Fulvio Ursini, Rina Venerando, Stefano Toppo
Reversible oxidation of Cys residues is a crucial element of redox homeostasis and signaling. According to a popular concept in oxidative stress signaling, the oxidation of targets of signals can only take place following an overwhelming of the cellular antioxidant capacity. This concept, however, ignores the activation of feedback mechanisms possibly leading to a paradoxical effect. In a model of cancer stem cells (CSC), stably overexpressing the TAZ oncogene, we observed that the increased formation of oxidants is associated with a globally more reduced state of proteins...
September 13, 2016: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/27597840/adipogenic-gene-expression-in-gilthead-sea-bream-mesenchymal-stem-cells-from-different-origin
#11
Cristina Salmerón, Natàlia Riera-Heredia, Joaquim Gutiérrez, Isabel Navarro, Encarnación Capilla
During the last decades, adipogenesis has become an emerging field of study in aquaculture due to the relevance of the adipose tissue in many physiological processes and its connection with the endocrine system. In this sense, recent studies have translated into the establishment of preadipocyte culture models from several fish species, sometimes lacking information on the mRNA levels of adipogenic genes. Thus, the aim of this study was to determine the gene expression profile of gilthead sea bream (Sparus aurata) primary cultured mesenchymal stem cells (MSCs) from different origin (adipose tissue and vertebra bone) during adipogenesis...
2016: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/27568457/royal-jelly-may-improve-the-metabolism-of-glucose-and-redox-state-of-ovine-oocytes-matured-in%C3%A2-vitro-and-embryonic-development-following-in%C3%A2-vitro-fertilization
#12
Mahbobeh Eshtiyaghi, Hamid Deldar, Zarbakht Ansari Pirsaraei, Bahram Shohreh
The aim of this study was to investigate the effect of different concentrations of royal jelly (RJ) on in vitro maturation (IVM), fertilization, cleavage, blastocyst rates, glutathione (GSH) content in ovine oocyte, mRNA abundance of antioxidant enzymes in both oocyte and cumulus, and glucose metabolism-related genes in cumulus cells. In vitro maturation of oocyte was performed in the presence of control (RJ0), 2.5 (RJ2.5), 5 (RJ5), and 10 (RJ10) mg/mL of RJ. Nuclear status, intracellular GSH content in oocytes, and mRNA abundance of selected genes were evaluated following 24 hours of IVM...
July 25, 2016: Theriogenology
https://www.readbyqxmd.com/read/27555322/subversion-of-schwann-cell-glucose-metabolism-by-mycobacterium-leprae
#13
Rychelle Clayde Affonso Medeiros, Karina do Carmo de Vasconcelos Girardi, Fernanda Karlla Luz Cardoso, Bruno de Siqueira Mietto, Thiago Gomes de Toledo Pinto, Lilian Sales Gomez, Luciana Silva Rodrigues, Mariana Gandini, Julio Jablonski Amaral, Sérgio Luiz Gomes Antunes, Suzana Corte-Real, Patricia Sammarco Rosa, Maria Cristina Vidal Pessolani, José Augusto da Costa Nery, Euzenir Nunes Sarno, Leonardo Ribeiro Batista-Silva, Mauro Sola-Penna, Marcus Fernandes Oliveira, Milton Ozório Moraes, Flavio Alves Lara
Mycobacterium leprae, the intracellular etiological agent of leprosy, infects Schwann promoting irreversible physical disabilities and deformities. These cells are responsible for myelination and maintenance of axonal energy metabolism through export of metabolites, such as lactate and pyruvate. In the present work, we observed that infected Schwann cells increase glucose uptake with a concomitant increase in glucose-6-phosphate dehydrogenase (G6PDH) activity, the key enzyme of the oxidative pentose pathway...
October 7, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27553761/dietary-carbohydrates-improve-oxidative-status-of-common-dentex-dentex-dentex-juveniles-a-carnivorous-fish-species
#14
Amalia Pérez-Jiménez, Emilia Abellán, Marta Arizcun, Gabriel Cardenete, Amalia E Morales, M Carmen Hidalgo
Common dentex (Dentex dentex) is an appreciated carnivorous fish with high growth rate and life cycle adaptable to existing farming techniques. Since the use of carbohydrates is an economic and sustainable alternative for a protein-sparing effect, the study of how this macronutrient affects the welfare of carnivorous species must be studied. The aim of the present study was to evaluate the effects of different types and levels of carbohydrates on common dentex oxidative status. Nine isonitrogenous (43%) and isoenergetic (22MJkg(-1)) diets were formulated combining three types (pregelatinized starch-PS, dextrin-Dx and maltodextrin-Mx) and three levels (12, 18 and 24%) of carbohydrates...
August 21, 2016: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/27502156/forizymes-functionalised-artificial-forisomes-as-a-platform-for-the-production-and-immobilisation-of-single-enzymes-and-multi-enzyme-complexes
#15
Franziska Visser, Boje Müller, Judith Rose, Dirk Prüfer, Gundula A Noll
The immobilisation of enzymes plays an important role in many applications, including biosensors that require enzyme activity, stability and recyclability in order to function efficiently. Here we show that forisomes (plant-derived mechanoproteins) can be functionalised with enzymes by translational fusion, leading to the assembly of structures designated as forizymes. When forizymes are expressed in the yeast Saccharomyces cerevisiae, the enzymes are immobilised by the self-assembly of forisome subunits to form well-structured protein bodies...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27497046/effects-of-stocking-density-on-antioxidant-status-metabolism-and-immune-response-in-juvenile-turbot-scophthalmus-maximus
#16
Baoliang Liu, Rui Jia, Cen Han, Bin Huang, Ji-Lin Lei
This study was designed to evaluate the physiological and immune responses of juvenile turbot to stocking density. Turbot (average weight 185.4g) were reared for 120days in a land based recirculating aquaculture system (RAS) under three stocking densities: low density (LD, ~9.3-26.1kg/m(2), initial to final density), medium density (MD, ~13.6-38.2kg/m(2)) and high density (HD, ~19.1-52.3kg/m(2)). Fish were sampled at days 0, 40, 80 and 120 to obtain growth parameters and liver tissues. No significant difference was detected in growth, biochemical parameters and gene expression among the three densities until at the final sampling (day 120)...
August 3, 2016: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/27475633/increasing-of-blastocyst-rate-and-gene-expression-in-co-culture-of-bovine-embryos-with-adult-adipose-tissue-derived-mesenchymal-stem-cells
#17
Moysés S Miranda, Hamilton S Nascimento, Mayra P R Costa, Nathália N Costa, Karynne N L Brito, Cinthia T A Lopes, Simone S D Santos, Marcela S Cordeiro, Otávio M Ohashi
PURPOSE: Despite advances in the composition of defined embryo culture media, co-culture with somatic cells is still used for bovine in vitro embryo production (IVEP) in many laboratories worldwide. Granulosa cells are most often used for this purpose, although recent work suggests that co-culture with stem cells of adult or embryonic origin or their derived biomaterials may improve mouse, cattle, and pig embryo development. MATERIALS AND METHODS: In experiment 1, in vitro produced bovine embryos were co-cultured in the presence of two concentrations of bovine adipose tissue-derived mesenchymal cells (b-ATMSCs; 10(3) and 10(4) cells/mL), in b-ATMSC preconditioned medium (SOF-Cond), or SOF alone (control)...
October 2016: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/27392023/evaluation-of-reference-genes-for-reverse-transcription-quantitative-pcr-studies-of-physiological-responses-in-the-ghost-moth-thitarodes-armoricanus-lepidoptera-hepialidae
#18
Guiqing Liu, Xuehong Qiu, Li Cao, Yi Zhang, Zubing Zhan, Richou Han
Reverse transcription quantitative real-time polymerase chain reaction (RT-qPCR) is the sensitive method to quantify the expression levels of target genes on the basis of endogenous control. An appropriate reference gene set for normalization is essential for reliable results. The ghost moth, Thitarodes armoricanus, a host species of a medicinal fungus, Ophiocordyceps sinensis, is an economically important member of the Lepidoptera. Recent studies have focused on the mechanism of adaptation of this species to its high-altitude environment and host immune response to O...
2016: PloS One
https://www.readbyqxmd.com/read/27353740/pharmacological-targeting-of-glucose-6-phosphate-dehydrogenase-in-human-erythrocytes-by-bay-11-7082-parthenolide-and-dimethyl-fumarate
#19
Mehrdad Ghashghaeinia, Daniela Giustarini, Pavla Koralkova, Martin Köberle, Kousi Alzoubi, Rosi Bissinger, Zohreh Hosseinzadeh, Peter Dreischer, Ingolf Bernhardt, Florian Lang, Mahmoud Toulany, Thomas Wieder, Renata Mojzikova, Ranieri Rossi, Ulrich Mrowietz
In mature erythrocytes, glucose-6-phosphate dehydrogenase (G6PDH) and 6-phosphogluconate dehydrogenase (6PGDH) yield NADPH, a crucial cofactor of the enzyme glutathione reductase (GR) converting glutathione disulfide (GSSG) into its reduced state (GSH). GSH is essential for detoxification processes in and survival of erythrocytes. We explored whether the anti-inflammatory compounds Bay 11-7082, parthenolide and dimethyl fumarate (DMF) were able to completely deplete a common target (GSH), and to impair the function of upstream enzymes of GSH recycling and replenishment...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27351718/combined-effects-of-temperature-changes-and-metal-contamination-at-different-levels-of-biological-organization-in-yellow-perch
#20
Julie Grasset, Élodie Ollivier, Bérénice Bougas, Glenn Yannic, Peter G C Campbell, Louis Bernatchez, Patrice Couture
In this study, we measured the effects of temperature (9°C, 20°C, and 28°C), metal contamination (cadmium and nickel) and their interaction on yellow perch (Perca flavescens) using liver enzymatic and transcriptomic endpoints and biometric indices. Kidney metal concentrations increased with a rise of temperature. The biometric indices analysed (Fulton condition factor, pyloric cæca, hepatosomatic and gonadosomatic indices) generally decreased with an increase of temperature but not with metal contamination...
August 2016: Aquatic Toxicology
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