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https://www.readbyqxmd.com/read/29914158/mediterranean-diet-score-associations-with-metabolic-products-of-the-intestinal-microbiome-carotid-plaque-burden-and-renal-function
#1
Michael Pignanelli, Caroline Just, Chrysi Bogiatzi, Vincent Dinculescu, Gregory B Gloor, Emma Allen-Vercoe, Gregor Reid, Bradley L Urquhart, Kelsey N Ruetz, Thomas J Velenosi, J David Spence
Metabolic products of the intestinal microbiome such as trimethylamine N-oxide (TMAO) that accumulate in renal failure (gut-derived uremic toxins, GDUTs) affect atherosclerosis and increase cardiovascular risk. We hypothesized that patients on a Mediterranean diet and those consuming lower amounts of dietary precursors would have lower levels of GDUTs. Patients attending vascular prevention clinics completed a Harvard Food Frequency Questionnaire (FFQ) and had plasma levels of TMAO, p-cresylsulfate, hippuric acid, indoxyl sulfate, p-cresyl glucuronide, phenyl acetyl glutamine, and phenyl sulfate measured by ultra-performance liquid chromatography coupled to quadrupole time-of-flight mass spectrometry...
June 16, 2018: Nutrients
https://www.readbyqxmd.com/read/29913209/supplementing-glycosylation-a-review-of-applying-nucleotide-sugar-precursors-to-growth-medium-to-affect-therapeutic-recombinant-protein-glycoform-distributions
#2
REVIEW
Eric J M Blondeel, Marc G Aucoin
Glycosylation is a critical quality attribute (CQA) of many therapeutic proteins, particularly monoclonal antibodies (mAbs), and is a major consideration in the approval of biosimilar biologics due to its effects to therapeutic efficacy. Glycosylation generates a distribution of glycoforms, resulting in glycoproteins with inherent molecule-to-molecule heterogeneity, capable of activating (or failing to activate) different effector functions of the immune system. Glycoforms can be affected by the supplementation of nucleotide-sugar precursors, and related components, to culture growth medium, affecting the metabolism of glycosylation...
June 15, 2018: Biotechnology Advances
https://www.readbyqxmd.com/read/29912979/evidence-of-cyclical-light-dark-regulated-expression-of-freezing-tolerance-in-young-winter-wheat-plants
#3
Daniel Z Skinner, Brian Bellinger, William Hiscox, Gregory L Helms
The ability of winter wheat (Triticum aestivum L.) plants to develop freezing tolerance through cold acclimation is a complex rait that responds to many environmental cues including day length and temperature. A large part of the freezing tolerance is conditioned by the C-repeat binding factor (CBF) gene regulon. We investigated whether the level of freezing tolerance of 12 winter wheat lines varied throughout the day and night in plants grown under a constant low temperature and a 12-hour photoperiod. Freezing tolerance was significantly greater (P<0...
2018: PloS One
https://www.readbyqxmd.com/read/29912245/dietary-supplemental-kluyveromyces-marxianus-alters-the-serum-metabolite-profile-in-broiler-chickens
#4
Weiwei Wang, Zhui Li, Liping Gan, Hao Fan, Yuming Guo
Metabolomics is used to evaluate the bioavailability of food components, as well as to validate the metabolic changes associated with food consumption. This study was conducted to investigate the effects of the dietary supplement Kluyveromyces marxianus on the serum metabolite profile in broiler chickens. A total of 240 1-d-old broilers were divided into 2 groups with 8 replicates. Birds were fed basal diets without or with K. marxianus supplementation (5 × 1010 CFU kg-1 of diet). Serum samples were collected on d 21 and were analyzed by high-performance liquid chromatography with quadrupole time-of flight/mass spectrometry...
June 18, 2018: Food & Function
https://www.readbyqxmd.com/read/29911073/metabolic-characterization-of-peripheral-host-responses-to-drainage-resistant-klebsiella-pneumoniae-liver-abscesses-by-serum-1h-nmr-spectroscopy
#5
Zhihui Chang, Hairui Wang, Beibei Li, Zhaoyu Liu, Jiahe Zheng
Purpose: To explore the metabolic characterization of host responses to drainage-resistant Klebsiella pneumoniae liver abscesses (DRKPLAs) with serum 1H-nuclear magnetic resonance (NMR) spectroscopy. Materials and Methods: The hospital records of all patients with a diagnosis of a liver abscess between June 2015 and December 2016 were retrieved from an electronic hospital database. Eighty-six patients with Klebsiella pneumoniae ( K. pneumoniae ) liver abscesses who underwent percutaneous drainage were identified...
2018: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29910316/nutrition-and-supplementation-considerations-to-limit-endotoxemia-when-exercising-in-the-heat
#6
REVIEW
Joshua H Guy, Grace E Vincent
Exercise-induced heat production is further elevated by exercise performed in hot conditions and this can subsequently impact inflammation, and gastrointestinal (GI) health. Implementing nutrition and supplementation strategies under these conditions may support the hyperthermic response, the systemic inflammatory response, GI permeability and integrity, and exercise performance. Therefore, the aim of this brief review is to explore athletes' inflammatory response of two key biomarkers, lipopolysaccharide (LPS), and interleukin-6 (IL-6), and provide nutrition and supplementation recommendations when exercising in hot conditions...
February 6, 2018: Sports
https://www.readbyqxmd.com/read/29909700/the-significant-role-of-amino-acids-during-pregnancy-nutritional-support
#7
Penelope D Manta-Vogli, Kleopatra H Schulpis, Yannis Dotsikas, Yannis L Loukas
BACKGROUND: Pregnancy is characterized by a complexity of metabolic processes that may impact fetal development and infant health outcome. Normal fetal growth and development depend on a continuous supply of nutrients via the placenta. The placenta transports, utilizes, produces and interconverts amino acids (AAs). FINDINGS: Concentrations of both nonessential and essential AAs in maternal plasma decrease in early pregnancy and persist at low concentrations throughout...
June 18, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29909456/construction-of-a-thermoresponsive-magnetic-porous-polymer-membrane-enzyme-reactor-for-glutaminase-kinetics-study
#8
Liping Zhao, Juan Qiao, Meyong Hee Moon, Li Qi
Fabrication of polymer membranes with nanopores and a confinement effect toward enzyme immobilization has been an enabling endeavor. In the work reported here, an enzyme reactor based on a thermoresponsive magnetic porous block copolymer membrane was designed and constructed. Reversible addition-fragmentation chain transfer polymerization was used to synthesize the block copolymer, poly(maleic anhydride-styrene-N-isopropylacrylamide), with poly(N-isopropylacrylamide) as the thermoresponsive moiety. The self-assembly property of the block copolymer was used for preparation of magnetic porous thin film matrices with iron oxide nanoparticles...
June 16, 2018: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29909287/prazosin-induced-lysosomal-tubulation-interferes-with-cytokinesis-and-the-endocytic-sorting-of-the-tumour-antigen-cd98hc
#9
Robert Fuchs, Anika Stracke, Viktoria Holzmann, Gerfried Luschin-Ebengreuth, Nathalie Meier-Allard, Nadine Ebner, Teresa Maria Lassacher, Markus Absenger-Novak, Eleonore Fröhlich, Matthias Schittmayer, Sara Cano Crespo, Manuel Palacin, Beate Rinner, Ruth Birner-Gruenberger
The quinazoline based drug prazosin (PRZ) is a potent inducer of apoptosis in human cancer cells. We recently reported that PRZ enters cells via endocytosis and induces tubulation of the endolysosomal system. In a proteomics approach aimed at identifying potential membrane proteins with binding affinity to quinazolines, we detected the oncoprotein CD98hc. We confirmed shuttling of CD98hc towards lysosomes and upregulation of CD98hc expression in PRZ treated cells. Gene knockout (KO) experiments revealed that endocytosis of PRZ still occurs in the absence of CD98hc - suggesting that PRZ does not enter the cell via CD98hc but misroutes the protein towards tubular lysosomes...
June 14, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29908254/the-neurotoxin-diethyl-dithiophosphate-impairs-glutamate-transport-in-cultured-bergmann-glia-cells
#10
Tatiana N Olivares-Bañuelos, Isabel Martínez-Hernández, Luisa C Hernández-Kelly, Donají Chi-Castañeda, Libia Vega, Arturo Ortega
Glutamate, the main excitatory neurotransmitter in the vertebrate Central Nervous System, is involved in almost every aspect of brain physiology, and its signaling properties are severely affected in most neurodegenerative diseases. This neurotransmitter has to be efficiently removed from the synaptic cleft in order to prevent an over-stimulation of glutamate receptors that leads to neuronal death. Specific sodium-dependent membrane transporters, highly enriched in glial cells, elicit the clearance of glutamate...
June 13, 2018: Neurochemistry International
https://www.readbyqxmd.com/read/29908151/vaccination-with-a-cd4-and-cd8-t-cell-epitopes-based-recombinant-chimeric-protein-derived-from-leishmania-infantum-proteins-confers-protective-immunity-against-visceral-leishmaniasis
#11
Daniel S Dias, Patrícia A F Ribeiro, Vívian T Martins, Daniela P Lage, Lourena E Costa, Miguel A Chávez-Fumagalli, Fernanda F Ramos, Thaís T O Santos, Fernanda Ludolf, Jamil S Oliveira, Tiago A O Mendes, Eduardo S Silva, Alexsandro S Galdino, Mariana C Duarte, Bruno M Roatt, Daniel Menezes-Souza, Antonio L Teixeira, Eduardo A F Coelho
Vaccination seems to be the best approach to control visceral leishmaniasis (VL). Resistance against infection is based on the development of a Th1 immune response characterized by the production of interferons-γ (IFN-γ), interleukin-12 (IL-12), granulocyte-macrophage-colony-stimulating factor (GM-CSF), and tumor necrosis factor-α (TNF-α), among others. A number of antigens have been tested as potential targets against the disease; few of them are able to stimulate human immune cells. In the present study, 1 prediction of MHC class I and II molecules-specific epitopes in the amino acid sequences of 3 Leishmania proteins: 1 hypothetical, prohibitin, and small glutamine-rich tetratricopeptide repeat-containing proteins, was performed using bioinformatics tools, and a T-cell epitopes-based recombinant chimeric protein was constructed, synthetized and purified to be evaluated in invitro and in vivo experiments...
May 22, 2018: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/29907927/-1-h-mrs-spectroscopy-in-preclinical-autosomal-dominant-alzheimer-disease
#12
Elizabeth Joe, Luis D Medina, John M Ringman, Joseph O'Neill
1 H magnetic resonance spectroscopy (MRS) can reveal changes in brain biochemistry in vivo in humans and has been applied to late onset Alzheimer disease (AD). Carriers of mutations for autosomal dominant Alzheimer disease (ADAD) may show changes in levels of metabolites prior to the onset of clinical symptoms. Proton MR spectra were acquired at 1.5 T for 16 cognitively asymptomatic or mildly symptomatic mutation carriers (CDR < 1) and 11 non-carriers as part of a comprehensive cross-sectional study of preclinical ADAD...
June 16, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29907529/kinetic-analysis-on-precursors-for-iturin-a-production-from-bacillus-amyloliquefaciens-bpd1
#13
Jiun-Yan Wu, Jen-Hung Liao, Chwen-Jen Shieh, Feng-Chia Hsieh, Yung-Chuan Liu
In this study, the precursor effect for iturin A production was quantitatively analyzed. A strain identified as Bacillus amyloliquefaciens BPD1 (Ba-BPD1) was selected due to its ability to produce iturin A. The enhancement of iturin A production in a submerged culture was tested using various additives, including palmitic acid, oils, and complex amino acids. Among these, complex amino acids triggered the highest yield at 559 mg/L. The respective amino acids that contribute to the structure of iturin A were used as precursors...
June 12, 2018: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/29905857/gfpt1-deficiency-in-muscle-leads-to-myasthenia-and-myopathy-in-mice
#14
Yasmin Issop, Denisa Hathazi, Muzamil Majid Khan, Rüdiger Rudolf, Joachim Weis, Sally Spendiff, Clarke R Slater, Andreas Roos, Hanns Lochmüller
Glutamine-fructose-6-phosphate transaminase 1 (GFPT1) is the rate-limiting enzyme in the hexosamine biosynthetic pathway which yields precursors required for protein and lipid glycosylation. Mutations in GFPT1 and other genes downstream of this pathway cause congenital myasthenic syndrome (CMS) characterised by fatigable muscle weakness due to impaired neurotransmission. The precise pathomechanisms at the neuromuscular junction (NMJ) due to a deficiency in GFPT1 is yet to be discovered. One of the challenges we face is the viability of Gfpt1 -/- knockout mice...
June 14, 2018: Human Molecular Genetics
https://www.readbyqxmd.com/read/29904952/baicalin-effects-on-rats-with-spinal-cord-injury-by-anti-inflammatory-and-regulating-the-serum-metabolic-disorder
#15
Shufeng Kang, Shizhao Liu, Hongzhu Li, Dapeng Wang, Xiangbei Qi
Baicalin had neuroprotective effects on inhibiting neuronal cell apoptosis induced by spinal cord ischemic injury. This study aimed to explore the protective effects of Baicalin on rats with spinal cord injury (SCI) and its mechanism of action. The recovery of spinal cord nerve function in rats was evaluated by the Basso, Beattie, and Bresnahan (BBB) score and the combine behavioral score (CBS). The expressions of cytokines tumor necrosis factor α (TNF-α), interleukin-1β (IL-1β), and IL-6 were detected by the enzyme-linked immunosorbent assay method...
June 15, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29904050/amino-acid-dependent-cmyc-expression-is-essential-for-nk-cell-metabolic-and-functional-responses-in-mice
#16
Róisín M Loftus, Nadine Assmann, Nidhi Kedia-Mehta, Katie L O'Brien, Arianne Garcia, Conor Gillespie, Jens L Hukelmann, Peter J Oefner, Angus I Lamond, Clair M Gardiner, Katja Dettmer, Doreen A Cantrell, Linda V Sinclair, David K Finlay
Natural killer (NK) cells are lymphocytes with important anti-tumour functions. Cytokine activation of NK cell glycolysis and oxidative phosphorylation (OXPHOS) are essential for robust NK cell responses. However, the mechanisms leading to this metabolic phenotype are unclear. Here we show that the transcription factor cMyc is essential for IL-2/IL-12-induced metabolic and functional responses in mice. cMyc protein levels are acutely regulated by amino acids; cMyc protein is lost rapidly when glutamine is withdrawn or when system L-amino acid transport is blocked...
June 14, 2018: Nature Communications
https://www.readbyqxmd.com/read/29899358/glutamine-89-is-a-key-residue-in-the-allosteric-modulation-of-human-serine-racemase-activity-by-atp
#17
Andrea V Canosa, Serena Faggiano, Marialaura Marchetti, Stefano Armao, Stefano Bettati, Stefano Bruno, Riccardo Percudani, Barbara Campanini, Andrea Mozzarelli
Serine racemase (SR) catalyses two reactions: the reversible racemisation of L-serine and the irreversible dehydration of L- and D-serine to pyruvate and ammonia. SRs are evolutionarily related to serine dehydratases (SDH) and degradative threonine deaminases (TdcB). Most SRs and TdcBs - but not SDHs - are regulated by nucleotides. SR binds ATP cooperatively and the nucleotide allosterically stimulates the serine dehydratase activity of the enzyme. A H-bond network comprising five residues (T52, N86, Q89, E283 and N316) and water molecules connects the active site with the ATP-binding site...
June 13, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29898596/metabolomics-reveals-how-cucumber-cucumis-sativus-reprograms-metabolites-to-cope-with-silver-ions-and-silver-nanoparticle-induced-oxidative-stress
#18
Huiling Zhang, Wenchao Du, Jose R Peralta-Videa, Jorge L Gardea-Torresdey, Jason C White, Arturo A Keller, Hongyan Guo, Rong Ji, Lijuan Zhao
Due to their well-known antifungal activity, the intentional use of Ag nanoparticle (NPs) as sustainable nano-fungicides is expected to increase in agriculture. However, the impacts of AgNPs on plants must be critically evaluated to guarantee their safe use in food production. In this study, 4-week-old cucumber (Cucumis sativus) plants received a foliar application of AgNPs (4 or 40 mg per plant) or Ag+ (0.04 or 0.4 mg per plant) for seven days. Gas chromatography-mass spectrometry (GC-MS) based non-target metabolomics enabled the identification and quantification of 268 metabolites in cucumber leaves...
June 14, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29896109/dan-lou-prescription-inhibits-foam-cell-formation-induced-by-ox-ldl-via-the-tlr4-nf-%C3%AE%C2%BAb-and-ppar%C3%AE-signaling-pathways
#19
Li-Na Gao, Xin Zhou, Yu-Ren Lu, Kefeng Li, Shan Gao, Chun-Quan Yu, Yuan-Lu Cui
Atherosclerosis is the major worldwide cause of mortality for patients with coronary heart disease. Many traditional Chinese medicine compound prescriptions for atherosclerosis treatment have been tried in patients. Dan-Lou prescription, which is improved from Gualou-Xiebai-Banxia decoction, has been used to treat chest discomfort (coronary atherosclerosis) for approximately 2,000 years in China. Although the anti-inflammatory activities of Dan-Lou prescription have been proposed previously, the mechanism remains to be explored...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29895729/sources-and-fates-of-carbamyl-phosphate-a-labile-energy-rich-molecule-with-multiple-facets
#20
REVIEW
Dashuang Shi, Ljubica Caldovic, Mendel Tuchman
Carbamyl phosphate (CP) is well-known as an essential intermediate of pyrimidine and arginine/urea biosynthesis. Chemically, CP can be easily synthesized from dihydrogen phosphate and cyanate. Enzymatically, CP can be synthesized using three different classes of enzymes: (1) ATP-grasp fold protein based carbamyl phosphate synthetase (CPS); (2) Amino-acid kinase fold carbamate kinase (CK)-like CPS (anabolic CK or aCK); and (3) Catabolic transcarbamylase. The first class of CPS can be further divided into three different types of CPS as CPS I, CPS II, and CPS III depending on the usage of ammonium or glutamine as its nitrogen source, and whether N -acetyl-glutamate is its essential co-factor...
June 12, 2018: Biology
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