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https://www.readbyqxmd.com/read/29149860/anaphylactic-shock-with-methylprednisolone-sodium-succinate-in-a-child-with-short-bowel-syndrome-and-cow-s-milk-allergy
#1
Federica Porcaro, Maria Giovanna Paglietti, Antonella Diamanti, Francesca Petreschi, Alessandra Schiavino, Valentina Negro, Valentina Pecora, Alessandro Fiocchi, Renato Cutrera
BACKGROUND: Medications with methyl-prednisolone sodium succinate containing lactose, which potentially contains traces of cow's milk proteins (CMP), could cause allergic reactions or compromise treatment of acute allergic reactions in sensitized patients. CASE PRESENTATION: We describe the unusual case of a one-year-old child affected by short bowel syndrome and history of severe cow's milk allergy (CMA) and anaphylactic reaction due to intravenous administration of methyl-prednisolone sodium succinate (Solu-Medrol 40 mg, Pfizer)...
November 17, 2017: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/29146334/impact-of-fluorescent-lighting-on-the-browning-potential-of-model-wine-solutions-containing-organic-acids-and-iron
#2
Paris Grant-Preece, Celia Barril, Leigh M Schmidtke, Andrew C Clark
Model wine solutions containing organic acids, individually or combined, and iron(III), were exposed to light from fluorescent lamps or stored in darkness for four hours. (-)-Epicatechin was then added, and the solutions incubated in darkness for 10days. Browning was monitored by UV-visible absorption spectrophotometry and UHPLC-DAD. The pre-irradiated solutions containing tartaric acid exhibited increased yellow/brown coloration compared to the dark controls mainly due to reaction of the tartaric acid photodegradation product glyoxylic acid with (-)-epicatechin to form xanthylium cation pigments...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29144820/pheochromocytoma-a-genetic-and-diagnostic-update
#3
Leilani B Mercado-Asis, Katherine I Wolf, Ivana Jochmanova, David Taïeb
OBJECTIVE: Pheochromocytomas and paragangliomas (PPGLs) are neuroendocrine tumors derived from adrenal or extra-adrenal locations, respectively. Upon suspicion of PPGL, specific metabolomic, molecular, biochemical, imaging, and histopathological studies are performed to prove, localize, treat, and monitor disease progression. Recently, improved diagnostic tools allow physicians to accurately diagnose PPGL, even in patients presenting with small (less than 1 cm) or biochemically silent tumors, which previously delayed proper detection and treatment...
November 16, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/29144179/effects-of-active-immunization-against-akirin2-on-muscle-fiber-type-composition-in-pigs
#4
Xiaoling Chen, Yafei Guo, Gang Jia, Hua Zhao, Guangmang Liu, Zhiqing Huang
The objective of this study was to investigate effects of active immunization against Akirin2 on muscle fiber-type composition in pigs. Here we showed that the titer of Akirin2 antibody in pigs immunized with porcine Akirin2 (pAkirin2) was significantly increased. Active immunization against pAkirin2 decreased succinic dehydrogenase and malate dehydrogenase activities and increased lactate dehydrogenase activity in the longissimus dorsi muscle of pigs. Active immunization against pAkirin2 significantly decreased MyHC I and MyHC IIa mRNA expressions and MyHC I protein expression and increased mRNA expressions of MyHC IIb as well as protein expressions of MyHC IIb and fast-MyHC...
November 16, 2017: Animal Biotechnology
https://www.readbyqxmd.com/read/29144073/evaluation-of-certain-food-additives
#5
(no author information available yet)
This report represents the conclusions of a Joint FAO/WHO Expert Committee convened to evaluate the safety of various food additives, including flavouring agents, with a view to concluding as to safety concerns and to preparing specifications for identity and purity. The first part of the report contains a general discussion of the principles governing the toxicological evaluation of and assessment of dietary exposure to food additives, including flavouring agents. A summary follows of the Committee’s evaluations of technical, toxicological and dietary exposure data for 10 food additives (Allura Red AC; carob bean gum; lutein esters from Tagetes erecta; octenyl succinic acid (OSA)– modified gum arabic; pectin; Quinoline Yellow; rosemary extract; steviol glycosides; tartrazine; and xanthan gum) and five groups of flavouring agents (alicyclic, alicyclic-fused and aromatic-fused ring lactones; aliphatic and aromatic amines and amides; aliphatic secondary alcohols, ketones and related esters; cinnamyl alcohol and related substances; and tetrahydrofuran and furanone derivatives)...
2017: World Health Organization Technical Report Series
https://www.readbyqxmd.com/read/29142828/metabolic-engineering-of-ustilago-trichophora-tz1-for-improved-malic-acid-production
#6
Thiemo Zambanini, Hamed Hosseinpour Tehrani, Elena Geiser, Christiane K Sonntag, Joerg M Buescher, Guido Meurer, Nick Wierckx, Lars M Blank
Ustilago trichophora RK089 has been found recently as a good natural malic acid producer from glycerol. This strain has previously undergone adaptive laboratory evolution for enhanced substrate uptake rate resulting in the strain U. trichophora TZ1. Medium optimization and investigation of process parameters enabled titers and rates that are able to compete with those of organisms overexpressing major parts of the underlying metabolic pathways. Metabolic engineering can likely further increase the efficiency of malate production by this organism, provided that basic genetic tools and methods can be established for this rarely used and relatively obscure species...
June 2017: Metabolic Engineering Communications
https://www.readbyqxmd.com/read/29138850/role-of-mitochondrial-function-in-the-invasiveness-of-human-colon-cancer-cells
#7
Chen-Sung Lin, Li-Tzu Liu, Liang-Hung Ou, Siao-Cian Pan, Chia-I Lin, Yau-Huei Wei
We investigated the role of mitochondrial function in the invasiveness of human colorectal cancer (CRC) cell lines, using paired primary SW480 and metastatic SW620 cells, and appraised the clinical relevance of the alteration of mtDNA copy number in 33 pairs of CRC specimens after surgical resection. Suppression of mitochondrial function was achieved by the exposure of cells to oligomycin A (OA) or by knockdown of mitochondrial transcriptional factor A (TFAM) to evaluate their effects on energy metabolism, reactive oxygen species, protein expression levels of epithelial-mesenchymal transition (EMT) markers and invasive activity of CRC cells...
November 9, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29137890/exposure-to-the-fungicide-propamocarb-causes-gut-microbiota-dysbiosis-and-metabolic-disorder-in-mice
#8
Sisheng Wu, Cuiyuan Jin, Yueyi Wang, Zhengwei Fu, Yuanxiang Jin
Propamocarb (PM) is a widely used fungicide with property of affecting fatty acid and phospholipid biosynthesis in funguses. In this study, we explored its effects on mice gut microbiota and metabolism by exposing mice to 3, 30, and 300 mg/L PM through drinking water for a duration of 28 days. We observed that the transcription of hepatic genes related to regulate lipid metabolism were perturbed by PM exposure. The microbiota in the cecal contents and feces changed during or after PM exposure at phylum or genus levels...
November 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29137485/heat-stress-prevents-the-decrease-in-succinate-dehydrogenase-activity-in-the-extensor-digitorum-longus-of-streptozotocin-induced-diabetic-rats
#9
K Nonaka, S Une, M Komatsu, R Yamaji, J Akiyama
This study aimed to investigate whether heat stress (HS) prevents a decrease in succinate dehydrogenase (SDH) activity and heat shock protein 60 (HSP60) and superoxide dismutase 2 (SOD2) contents in the extensor digitorum longus of streptozotocin (STZ)-induced diabetic rats. Twelve-week-old male Wistar rats were assigned to one of the four groups (n=6/group): control (Con), HS, diabetes mellitus (DM), and diabetes mellitus and heat stress (DM+HS). Diabetes was induced by the administration of STZ (50 mg/kg)...
November 10, 2017: Physiological Research
https://www.readbyqxmd.com/read/29137472/changes-in-transcription-pattern-lead-to-a-marked-decrease-in-cox-cs-and-sqr-activity-after-the-developmental-point-of-the-22-nd-gestational-week
#10
H Kolarova, J Krizova, M Hulkova, H Hansikova, H Hulkova, V Smid, J Zeman, T Honzik, M Tesarova
Tissue differentiation and proliferation throughout fetal development interconnect with changes in the Oxidative Phosphorylation System (OXPHOS) on the cellular level. Reevaluation of the expression data revealed a significant increase in COX4 and MTATP6 liver transcription levels after the 22(nd) gestational week (GW) which inspired us to characterize its functional impact. Specific activities of cytochrome c oxidase (COX), citrate synthase (CS), succinate-coenzyme Q reductase (SQR) and mtDNA determined by spectrophotometry and RT-PCR were studied in a set of 25 liver and 18 skeletal muscle samples at 13(th) to 29(th) GW...
November 10, 2017: Physiological Research
https://www.readbyqxmd.com/read/29136806/multivariate-analysis-of-organic-acids-in-fermented-food-from-reversed-phase-high-performance-liquid-chromatography-data
#11
Pablo Mortera, Federico A Zuljan, Christian Magni, Santiago A Bortolato, Sergio H Alarcón
Multivariate calibration coupled to RP-HPLC with diode array detection (HPLC-DAD) was applied to the identification and the quantitative evaluation of the short chain organic acids (malic, oxalic, formic, lactic, acetic, citric, pyruvic, succinic, tartaric, propionic and α-cetoglutaric) in fermented food. The goal of the present study was to get the successful resolution of a system in the combined occurrence of strongly coeluting peaks, of distortions in the time sensors among chromatograms, and of the presence of unexpected compounds not included in the calibration step...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29133896/the-food-borne-pathogen-campylobacter-jejuni-responds-to-the-bile-salt-deoxycholate-with-countermeasures-to-reactive-oxygen-species
#12
Nicholas M Negretti, Christopher R Gourley, Geremy Clair, Joshua N Adkins, Michael E Konkel
Bile plays an important role in digestion, absorption of fats, and the excretion of waste products, while concurrently providing a critical barrier against colonization by harmful bacteria. Previous studies have demonstrated that gut pathogens react to bile by adapting their protein synthesis. The ability of pathogens to respond to bile is remarkably complex and still incompletely understood. Here we show that Campylobacter jejuni, a leading bacterial cause of human diarrheal illness worldwide, responds to deoxycholate, a component of bile, by altering global gene transcription in a manner consistent with a strategy to mitigate exposure to reactive oxygen stress...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29133864/effects-of-microgravity-on-osteoblast-mitochondria-a-proteomic-and-metabolomics-profile
#13
Anna Michaletti, Magda Gioia, Umberto Tarantino, Lello Zolla
The response of human primary osteoblasts exposed to simulated microgravity has been investigated and analysis of metabolomic and proteomic profiles demonstrated a prominent dysregulation of mitochondrion homeostasis. Gravitational unloading treatment induced a decrease in mitochondrial proteins, mainly affecting efficiency of the respiratory chain. Metabolomic analysis revealed that microgravity influenced several metabolic pathways; stimulating glycolysis and the pentose phosphate pathways, while the Krebs cycle was interrupted at succinate-fumarate transformation...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29132536/effects-of-acute-hyperinsulinemia-on-skeletal-muscle-mitochondrial-function-reactive-oxygen-species-production-and-metabolism-in-premenopausal-women
#14
Jonathan L Warren, Sule Bulur, Fernando Ovalle, Samuel T Windham, Barbara A Gower, Gordon Fisher
BACKGROUND: Acute metabolic demands that promote excessive and/or prolonged reactive oxygen species production may stimulate changes in mitochondrial oxidative capacity. PURPOSE: To assess changes in skeletal muscle H2O2 production, mitochondrial function, and expression of genes at the mRNA and protein levels regulating energy metabolism and mitochondrial dynamics following a hyperinsulinemic-euglycemic clamp in a cohort of 11 healthy premenopausal women. METHODS: Skeletal muscle biopsies of the vastus lateralis were taken at baseline and immediately following the conclusion of a hyperinsulinemic-euglycemic clamp...
December 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29128917/heterologous-expression-of-mitochondrial-nicotinamide-adenine-dinucleotide-transporter-ndt1-from-aspergillus-fumigatus-rescues-impaired-growth-in-%C3%AE-ndt1%C3%AE-ndt2-saccharomyces-cerevisiae-strain
#15
Laís de Lourdes de Lima Balico, Emerson de Souza Santos, Silveli Suzuki-Hatano, Lucas Oliveira Sousa, Ana Elisa Caleiro Seixas Azzolini, Yara Maria Lucisano-Valim, Taisa Magnani Dinamarco, Vinicius Kannen, Sérgio Akira Uyemura
Our understanding of nicotinamide adenine dinucleotide mitochondrial transporter 1 (Ndt1A) in Aspergillus fumigatus remains poor. Thus, we investigated whether Ndt1A could alter fungi survival. To this end, we engineered the expression of an Ndt1A-encoding region in a Δndt1Δndt2 yeast strain. The resulting cloned Ndt1A protein promoted the mitochondrial uptake of nicotinamide adenine dinucleotide (NAD(+)), generating a large mitochondrial membrane potential. The NAD(+) carrier utilized the electrochemical proton gradient to drive NAD(+) entrance into mitochondria when the mitochondrial membrane potential was sustained by succinate...
November 11, 2017: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/29128444/metabolomics-and-gene-expression-analysis-reveal-down-regulation-of-the-citric-acid-tca-cycle-in-non-diabetic-ckd-patients
#16
Stein Hallan, Maryam Afkarian, Leila R Zelnick, Bryan Kestenbaum, Shoba Sharma, Rintaro Saito, Manjula Darshi, Gregory Barding, Daniel Raftery, Wenjun Ju, Matthias Kretzler, Kumar Sharma, Ian H de Boer
Chronic kidney disease (CKD) is a public health problem with very high prevalence and mortality. Yet, there is a paucity of effective treatment options, partly due to insufficient knowledge of underlying pathophysiology. We combined metabolomics (GCMS) with kidney gene expression studies to identify metabolic pathways that are altered in adults with non-diabetic stage 3-4 CKD versus healthy adults. Urinary excretion rate of 27 metabolites and plasma concentration of 33 metabolites differed significantly in CKD patients versus controls (estimate range-68% to +113%)...
October 31, 2017: EBioMedicine
https://www.readbyqxmd.com/read/29128306/norman-bowery-s-discoveries-about-extrasynaptic-and-asynaptic-gaba-systems-and-their-significance
#17
REVIEW
David A Brown
Before discovering the GABA-B receptor, Norman Bowery completed a series of studies on an extrasynaptic or asynaptic "GABA system" in the rat superior cervical sympathetic ganglion. First, he discovered an uptake system for GABA in neuroglial cells in the ganglia and in peripheral nerves, with a different substrate specificity than that in neurons. Second, he showed that accumulated GABA in sympathetic glial cells was metabolized to succinate by a transaminase enzyme. Third, he provided detailed structure-activity information about compounds activating an extrasynaptic GABA-A receptor on neurons in the rat sympathetic ganglion...
November 8, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29127014/structural-insights-and-binding-of-a-natural-ligand-succinic-acid-with-serine-and-cysteine-proteases
#18
R Manohar, N H V Kutumbarao, Raghavendra Sashi Krishna Nagampalli, D Velmurugan, K Gunasekaran
In the age of growing infectious diseases, there is a great demand for new inhibitors which can exhibit minimum side effects. Owing to the importance of proteases in life cycle and invasion, they have been projected as attractive targets for structure based drug designing against microbes including viruses. Here we report the inhibitory activity of a well known natural compound succinic acid against both serine and cysteine proteases. The ligand is found co-crystallized with Bovine pancreatic trypsin in one of our crystallization trials and the diffraction data up to1...
November 7, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29126304/sdhc-promoter-methylation-a-novel-pathogenic-mechanism-in-parasympathetic-paragangliomas
#19
Cristóbal Bernardo-Castiñeira, Nuria Valdés, Marta I Sierra, Inés Sáenz-de-Santa-María, Gustavo F Bayón, Raúl F Perez, Agustín F Fernández, Mario F Fraga, Aurora Astudillo, Rafael Menéndez, Belén Fernández, Maribel Del Olmo, Carlos Suarez, María-Dolores Chiara
Context: Germline mutations in the succinate dehydrogenase A, B, C, and D genes (collectively, SDHx) predispose to the development of paragangliomas (PGLs) arising at the parasympathetic or sympathetic neuroendocrine systems. SDHx mutations cause absence of tumoral immunostaining for SDHB. However, negative SDHB-immunostaining has also been found in a subset of PGLs that lack SDHx mutations. Settings: Here, we report the comprehensive molecular characterization of one such a tumor of parasympathetic origin compared with healthy paraganglia and other PGLs with or without SDHx mutations...
November 3, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29125700/bioavailability-and-pharmacokinetics-of-trpv1-antagonist-mavatrep-jnj-39439335-tablet-and-capsule-formulations-in-healthy-men-two-open-label-crossover-single-dose-phase-1-studies
#20
Prasarn Manitpisitkul, Kevin Shalayda, Lucille Russell, Panna Sanga, Yinka Williams, Bhavna Solanki, Joseph Caruso, John A Moyer
To improve room temperature stability and oral bioavailability of mavatrep (JNJ-39439335, a transient receptor potential vanilloid subtype-1 antagonist), various formulations were initially developed and evaluated in 2 phase 1 open-label, randomized, 3-way crossover studies in healthy participants. Study 1 evaluated 2 new overencapsulated tablet formulations (formulations B and C) relative to an overencapsulated early tablet formulation (formulation A), using mavatrep HCl salt form. Because these tablets were still not room-temperature stable, in study 2: two free-base solid dispersion amorphous formulations (formulations D and E) were evaluated relative to the best encapsulated formulation from study 1 (formulation C) and also food effect...
November 10, 2017: Clinical Pharmacology in Drug Development
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