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https://www.readbyqxmd.com/read/28646115/genome-analysis-of-endomicrobium-proavitum-suggests-loss-and-gain-of-relevant-functions-during-the-evolution-of-intracellular-symbionts
#1
Hao Zheng, Carsten Dietrich, Andreas Brune
Bacterial endosymbionts of eukaryotes show progressive genome erosion, but detailed investigations of the evolutionary processes involved in the transition to an intracellular lifestyle are generally hampered by the lack of extant free-living lineages. Here, we characterize the genome of the recently isolated, free-living Endomicrobium proavitum, the second member of the Elusimicrobia phylum brought into pure culture, and compare it to the closely related "Candidatus Endomicrobium trichonymphae" strain Rs-D17, a previously described but uncultured endosymbiont of termite gut flagellates...
June 23, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28644370/adaptation-of-new-colombian-food-based-complementary-feeding-recommendations-using-linear-programming
#2
Marion Tharrey, Gilma A Olaya, Mary Fewtrell, Elaine Ferguson
OBJECTIVE: To use Linear Programming (LP) analyses to adapt New Complementary Feeding Guidelines (NCFg) designed for infants aged 6-12 month (m) living in poor socioeconomic circumstances in Bogota to ensure dietary adequacy for young children aged 12-23 m. DESIGN: A secondary data analysis was performed using dietary and anthropometric data collected from 12 m old infants (n = 72) participating in a randomised controlled trial. LP analyses were performed to identify nutrients whose requirements were difficult to achieve using local foods as consumed; and to test and compare the NCFg and alternative food-based recommendations (FBRs) on the basis of dietary adequacy, for 11 micronutrients, at the population level...
June 21, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28638911/synthesis-and-characterization-of-catalytically-active-thiazolium-gold-i-carbenes
#3
Clément C Dince, Roy A Meoded, Donald Hilvert
Thiamin analogs were used to synthesize mono gold(i)-carbene derivatives in a single step under aqueous conditions. The resulting thiazolium gold(i)-carbenes catalyze 5-endo-dig carbocyclization of an acetylenic dicarbonyl compound in organic solvents and hydroalkoxylation of an allene in aqueous buffer.
June 22, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28636325/challenges-and-hallmarks-of-establishing-alkylacetylphosphonates-as-probes-of-bacterial-1-deoxy-d-xylulose-5-phosphate-synthase
#4
Sara Sanders, Ryan J Vierling, David Bartee, Alicia A DeColli, Mackenzie J Harrison, Joseph L Aklinski, Andrew T Koppisch, Caren L Freel Meyers
1-Deoxy-d-xylulose 5-phosphate (DXP) synthase catalyzes the thiamin diphosphate (ThDP)-dependent formation of DXP from pyruvate and d-glyceraldehyde 3-phosphate. DXP is at a metabolic branch point in bacteria, feeding into the methylerythritol phosphate pathway to indispensable isoprenoids and acting as a precursor for biosynthesis of essential cofactors in central metabolism, pyridoxal phosphate and ThDP, the latter of which is also required for DXP synthase catalysis. DXP synthase follows a unique random sequential mechanism and possesses an unusually large active site...
June 21, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/28633312/the-influence-of-dekkera-bruxellensis-on-the-transcriptome-of-saccharomyces-cerevisiae-and-on-the-aromatic-profile-of-synthetic-wine-must
#5
Janez Kosel, Neža Cadež, Dorit Schuller, Laura Carreto, Ricardo Franco-Duarte, Peter Raspor
A double compartment membrane system was constructed in order to systematically study possible microbial interactions between yeasts Saccharomyces cerevisiae and Dekkera bruxellensis and their impact on wine aroma. The presence of D. bruxellensis induced 77 transcripts of S. cerevisiae. These were mostly of unknown function; however, some were involved in thiamine biosynthesis and in amino acid and polyamine transport, suggesting a competitive relationship between the two yeast species. Among the transcripts with no biological function, 14 of them were found to be the members of the PAU gene family that is associated with response to anaerobiosis stress...
June 1, 2017: FEMS Yeast Research
https://www.readbyqxmd.com/read/28604792/characteristics-clinical-course-and-outcomes-of-homeless-and-non-homeless-patients-admitted-to-icu-a-retrospective-cohort-study
#6
Orla M Smith, Clarence Chant, Karen E A Burns, Maninder Kaur, Said Ashraf, Claudia C DosSantos, Stephen W Hwang, Jan O Friedrich
BACKGROUND: Little is known about homeless patients in intensive care units (ICUs). OBJECTIVES: To compare clinical characteristics, treatments, and outcomes of homeless to non-homeless patients admitted to four ICUs in a large inner-city academic hospital. METHODS: 63 randomly-selected homeless compared to 63 age-, sex-, and admitting-ICU-matched non-homeless patients. RESULTS: Compared to matched non-homeless, homeless patients (average age 48±12 years, 90% male, 87% admitted by ambulance, 56% mechanically ventilated, average APACHE II 17) had similar comorbidities and illness severity except for increased alcohol (70% vs 17%,p<0...
2017: PloS One
https://www.readbyqxmd.com/read/28602070/a-prognostic-evaluation-and-management-of-alcoholic-hepatitis
#7
Ramesh Rana, Sheng-Lan Wang, Jing Li, Lu Xia, Mei-Yi Song, Chang-Qing Yang
Alcoholic hepatitis is an acute and severe form of alcoholic liver disease associated with high morbidity and mortality of 30-50% worldwide, severity ranging from asymptomatic derangement of liver biochemistries to fulminant liver failure or death. Rapidly progressing jaundice and coagulopathy in prolonged excessive alcohol abusers with or without fever, malnutrition, and tender liver are the clinical hallmarks. The prognostic models (MELD, MDF, ABIC, GAHS, Lille's score) not only predict the short term mortality, but also guide the clinicians to choose appropriate specific therapy (corticosteroid or pentoxifylline) and as a stopping rule if there is no significant benefits of it...
June 9, 2017: Minerva Medica
https://www.readbyqxmd.com/read/28601082/thiamine-induces-long-term-changes-in-amino-acid-profiles-and-activities-of-2-oxoglutarate-and-2-oxoadipate-dehydrogenases-in-rat-brain
#8
P M Tsepkova, A V Artiukhov, A I Boyko, V A Aleshin, G V Mkrtchyan, M A Zvyagintseva, S I Ryabov, A L Ksenofontov, L A Baratova, A V Graf, V I Bunik
Molecular mechanisms of long-term changes in brain metabolism after thiamine administration (single i.p. injection, 400 mg/kg) were investigated. Protocols for discrimination of the activities of the thiamine diphosphate (ThDP)-dependent 2-oxoglutarate and 2-oxoadipate dehydrogenases were developed to characterize specific regulation of the multienzyme complexes of the 2-oxoglutarate (OGDHC) and 2-oxoadipate (OADHC) dehydrogenases by thiamine. The thiamine-induced changes depended on the brain-region-specific expression of the ThDP-dependent dehydrogenases...
June 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28578733/seed-treatments-with-thiamine-reduce-the-performance-of-generalist-and-specialist-aphids-on-crop-plants
#9
A M Hamada, J Fatehi, L M V Jonsson
Thiamine is a vitamin that has been shown to act as a trigger to activate plant defence and reduce pathogen and nematode infection as well as aphid settling and reproduction. We have here investigated whether thiamine treatments of seeds (i.e. seed dressing) would increase plant resistance against aphids and whether this would have different effects on a generalist than on specialist aphids. Seeds of wheat, barley, oat and pea were treated with thiamine alone or in combination with the biocontrol bacteria Pseudomonas chlororaphis MA 342 (MA 342)...
June 5, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28576291/a-pilot-study-into-a-possible-relationship-between-diet-and-stuttering
#10
Jean Hum, Toni Rietveld, Piet Wiedijk, Pascal van Lieshout
PURPOSE: There are theoretical and empirical reasons to consider a potential role for copper metabolism in the brain in how it could influence stuttering. However, a link between stuttering and dietary intake has never been researched in a systematic way. This pilot study therefore aimed to explore a possible association between ingested amounts of copper and thiamine (vitamin B1) with stuttering frequency using a double blind cross-over longitudinal paradigm. METHODS: 19 adults who stutter between 20 and 51 years old filled out an online survey for 9 consecutive weeks...
June 2017: Journal of Fluency Disorders
https://www.readbyqxmd.com/read/28574307/korsakoff-syndrome-from-retrochiasmatic-suprasellar-lesions-rapid-reversal-after-relief-of-cerebral-compression-in-4-cases
#11
Luis E Savastano, Todd C Hollon, Ariel L Barkan, Stephen E Sullivan
Korsakoff syndrome is a chronic memory disorder caused by a severe deficiency of thiamine that is most commonly observed in alcoholics. However, some have proposed that focal structural lesions disrupting memory circuits-in particular, the mammillary bodies, the mammillothalamic tract, and the anterior thalamus-can give rise to this amnestic syndrome. Here, the authors present 4 patients with reversible Korsakoff syndromes caused by suprasellar retrochiasmatic lesions compressing the mammillary bodies and adjacent caudal hypothalamic structures...
June 2, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28572841/de-novo-assembly-functional-annotation-and-analysis-of-the-giant-reed-arundo-donax-l-leaf-transcriptome-provide-tools-for-the-development-of-a-biofuel-feedstock
#12
Chiara Evangelistella, Alessio Valentini, Riccardo Ludovisi, Andrea Firrincieli, Francesco Fabbrini, Simone Scalabrin, Federica Cattonaro, Michele Morgante, Giuseppe Scarascia Mugnozza, Joost J B Keurentjes, Antoine Harfouche
BACKGROUND: Arundo donax has attracted renewed interest as a potential candidate energy crop for use in biomass-to-liquid fuel conversion processes and biorefineries. This is due to its high productivity, adaptability to marginal land conditions, and suitability for biofuel and biomaterial production. Despite its importance, the genomic resources currently available for supporting the improvement of this species are still limited. RESULTS: We used RNA sequencing (RNA-Seq) to de novo assemble and characterize the A...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28570331/nutrients-and-neurology
#13
Neeraj Kumar
PURPOSE OF REVIEW: This article provides an update on the clinical presentation and management of neurologic disease related to key nutrient deficiencies. RECENT FINDINGS: Major advances have been made in understanding the pathway related to vitamin B12 absorption and distribution. It is now known that deficiencies of vitamin B12 and copper have similar neurologic manifestations. Bariatric surgery is a risk factor for both. Alcoholism is just one of the many causes of thiamine deficiency...
June 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28556429/acute-nutritional-axonal-neuropathy
#14
Johanna Hamel, Eric L Logigian
INTRODUCTION: This study describes clinical, laboratory, and electrodiagnostic features of a severe acute axonal polyneuropathy common to patients with acute nutritional deficiency in the setting of alcoholism, bariatric surgery (BS), or anorexia. METHODS: Retrospective analysis of clinical, electrodiagnostic, and laboratory data of patients with acute axonal neuropathy. RESULTS: Thirteen patients were identified with a severe, painful, sensory or sensorimotor axonal polyneuropathy that developed over 2-12 weeks with sensory ataxia, areflexia, variable muscle weakness, poor nutritional status, and weight loss, often with prolonged vomiting and normal cerebrospinal fluid protein...
May 26, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28552632/structural-basis-for-the-magnesium-dependent-activation-of-transketolase-from-chlamydomonas-reinhardtii
#15
Miriam Pasquini, Simona Fermani, Daniele Tedesco, Chiara Sciabolini, Pierre Crozet, Marina Naldi, Julien Henri, Ute Vothknecht, Carlo Bertucci, Stéphane D Lemaire, Mirko Zaffagnini, Francesco Francia
BACKGROUND: In photosynthetic organisms, transketolase (TK) is involved in the Calvin-Benson cycle and participates to the regeneration of ribulose-5-phosphate. Previous studies demonstrated that TK catalysis is strictly dependent on thiamine pyrophosphate (TPP) and divalent ions such as Mg(2+). METHODS: TK from the unicellular green alga Chlamydomonas reinhardtii (CrTK) was recombinantly produced and purified to homogeneity. Biochemical properties of the CrTK enzyme were delineated by activity assays and its structural features determined by CD analysis and X-ray crystallography...
August 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28540694/wernicke-s-encephalopathy-in-exclusive-breastfed-infants
#16
Javeed Iqbal Bhat, Qazi Iqbal Ahmed, Ambreen Ali Ahangar, Bashir Ahmed Charoo, Mushtaq Ahmad Sheikh, Wajid Ali Syed
BACKGROUND: Kashmir has a population that largely consumes polished rice which is deficient in thiamine. Furthermore, lactating women in this region are prone to severe thiamine deficiency because of their traditional food avoidance practices. Infantile beriberi is common in exclusively breastfed infants of thiamine deficient mothers in Kashmir. METHODS: This was a one year prospective hospital-based study. We included 50 exclusively breastfed infants in our study...
May 24, 2017: World Journal of Pediatrics: WJP
https://www.readbyqxmd.com/read/28539246/consideration-of-alternative-causes-of-lactic-acidosis-thiamine-deficiency-in-malignancy
#17
Ryan K Dean, Rogin Subedi, Dalvir Gill, Amitpal Nat
Lactic acidosis is a common metabolic acidosis characterized by increased serum lactate and is usually associated with a decreased blood pH. Lactic acidosis has many different causes but has been differentiated into type A, hypoxic causes, and type B, non-hypoxic causes. Tissue hypoxia, type A, is the most common cause, usually secondary to processes such as sepsis and multi-organ failure. Type A must be differentiated from type B in the correct clinical setting as treatments are vastly different. Type B causes may include drug side-effects, toxins, enzymatic defects, inherited or acquired, any of which may lead to overproduction or underutilization of lactate...
May 15, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28534098/effect-of-the-zinc-oxide-nanoparticles-and-thiamine-for-the-management-of-diabetes-in-alloxan-induced-mice-a-stereological-and-biochemical-study
#18
Abdolrahman Amiri, Rahmat Allah Fatahian Dehkordi, Mohamad Saeed Heidarnejad, Mohsen Jafarian Dehkordi
This research was carried out to evaluate the antidiabetic effects of zinc oxide nanoparticles (ZnO NPs) and thiamine following experimental diabetes. Fifty-six 6-week-old female mice were used and divided into seven groups of eight animals. Diabetes was induced in fasted mice by using intraperitoneal (IP) injection of alloxan (180 mg/kg). Groups included (I) non-diabetic control, (II) thiamine (30 mg/l, IP), (III) alloxan-induced diabetic mice, (IV) diabetes + ZnO NPs (0.1 mg/kg IP), (V) diabetes + ZnO NPs (0...
May 22, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28532520/are-more-environmentally-sustainable-diets-with-less-meat-and-dairy-nutritionally-adequate
#19
S Marije Seves, Janneke Verkaik-Kloosterman, Sander Biesbroek, Elisabeth Hm Temme
OBJECTIVE: Our current food consumption patterns, and in particular our meat and dairy intakes, cause high environmental pressure. The present modelling study investigates the impact of diets with less or no meat and dairy foods on nutrient intakes and assesses nutritional adequacy by comparing these diets with dietary reference intakes. DESIGN: Environmental impact and nutrient intakes were assessed for the observed consumption pattern (reference) and two replacement scenarios...
May 23, 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/28531788/association-of-dietary-factors-with-severity-of-coronary-artery-disease
#20
Namita Mahalle, M K Garg, S S Naik, M V Kulkarni
BACKGROUND: Cardiovascular disease has taken epidemic proportions during past decades. Cardiovascular risk factors contribute to progression of coronary lesions, worsening the patient's prognosis. This study was planned to analyze the association of dietary factors with severity of coronary artery disease (CAD) in Indian patients. METHODS: Three hundred patients with known coronary disease above the age of 25 years were included in this study. Blood samples were collected for biochemical markers...
October 2016: Clinical Nutrition ESPEN
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