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b12 and energy

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https://www.readbyqxmd.com/read/29034851/nitrosopumilus-maritimus-gen-nov-sp-nov-nitrosopumilus-cobalaminigenes-sp-nov-nitrosopumilus-oxyclinae-sp-nov-and-nitrosopumilus-ureiphilus-sp-nov-four-marine-ammonia-oxidizing-archaea-of-the-phylum-thaumarchaeota
#1
Wei Qin, Katherine R Heal, Rasika Ramdasi, Julia N Kobelt, Willm Martens-Habbena, Anthony D Bertagnolli, Shady A Amin, Christopher B Walker, Hidetoshi Urakawa, Martin Könneke, Allan H Devol, James W Moffett, E Virginia Armbrust, Grant J Jensen, Anitra E Ingalls, David A Stahl
Four mesophilic, neutrophilic, and aerobic marine ammonia-oxidizing archaea, designated strains SCM1(T), HCA1(T), HCE1(T) and PS0(T), were isolated from a tropical marine fish tank, dimly lit deep coastal waters, the lower euphotic zone of coastal waters, and near-surface sediment in the Puget Sound estuary, respectively. Cells are straight or slightly curved small rods, 0.15-0.26 µm in diameter and 0.50-1.59 µm in length. Motility was not observed, although strain PS0(T) possesses genes associated with archaeal flagella and chemotaxis, suggesting it may be motile under some conditions...
October 16, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29034175/refining-low-protein-modular-feeds-for-children-on-low-protein-tube-feeds-with-organic-acidaemias
#2
A Daly, S Evans, C Ashmore, S Chahal, S Santra, A MacDonald
Children with inherited metabolic disorders (IMD) who are dependent on tube feeding and require a protein restriction are commonly fed by 'modular tube feeds' consisting of several ingredients. A longitudinal, prospective two-phase study, conducted over 18 months assessed the long-term efficacy of a pre-measured protein-free composite feed. This was specifically designed to meet the non-protein nutritional requirements of children (aged over 1 year) with organic acidaemias on low protein enteral feeds and to be used as a supplement with an enteral feeding protein source...
December 2017: Molecular Genetics and Metabolism Reports
https://www.readbyqxmd.com/read/29031257/the-effects-of-halogen-elements-on-the-opening-of-an-icosahedral-b12-framework
#3
Liang-Fa Gong, Wei Li, Edison Osorio, Xin-Min Wu, Thomas Heine, Lei Liu
The fully halogenated or hydrogenated B12X12(2-) (X = H, F, Cl, Br and I) clusters are confirmed to be icosahedral. On the other hand, the bare B12 cluster is shown to have a planar structure. A previous study showed that a transformation from an icosahedron to a plane happens when 5 to 7 iodine atoms are remained [P. Farràs et al., Chem. - Eur. J. 18, 13208-13212 (2012)]. Later, the transition was confirmed to be seven iodine atoms based on an infrared spectroscopy study [M. R. Fagiania et al., Chem. Phys...
October 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28949132/protein-dynamics-in-the-reductive-activation-of-a-b12-containing-enzyme
#4
Sebastian Goetzl, Christian Teutloff, Tobias Werther, Sandra E Hennig, Jae-Hun Jeoung, Robert Bittl, Holger Dobbek
B12-dependent proteins are involved in methyl transfer reactions ranging from the biosynthesis of methionine in humans to the formation of acetyl-CoA in anaerobic bacteria. During their catalytic cycle, they undergo large conformational changes to interact with various proteins. Recently, the crystal structure of the B12-containing corrinoid iron-sulfur protein (CoFeSP) in complex with its reductive activator (RACo) was determined, providing a first glimpse of how energy is transduced in the ATP-dependent reductive activation of corrinoid-containing methyltransferases...
October 17, 2017: Biochemistry
https://www.readbyqxmd.com/read/28940428/maternal-alcohol-use-and-nutrition-during-pregnancy-diet-and-anthropometry
#5
R Colin Carter, Marjanne Senekal, Neil C Dodge, Lori Bechard, Ernesta M Meintjes, Christopher D Molteno, Christopher Duggan, Joseph L Jacobson, Sandra W Jacobson
BACKGROUND: Despite known risks of prenatal nutritional deficiencies and studies documenting increased prevalence of poor dietary intake among non-pregnant alcohol abusers, the nutritional status of heavy drinking pregnant women remains largely unstudied. Animal models have found interactions between prenatal ethanol exposure and micronutrients, such as choline, folate, B12, and iron, and human studies have reported that lower maternal weight and body mass confer increased fetal alcohol-related risk...
September 20, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28924423/vegan-diets-practical-advice-for-athletes-and-exercisers
#6
REVIEW
David Rogerson
With the growth of social media as a platform to share information, veganism is becoming more visible, and could be becoming more accepted in sports and in the health and fitness industry. However, to date, there appears to be a lack of literature that discusses how to manage vegan diets for athletic purposes. This article attempted to review literature in order to provide recommendations for how to construct a vegan diet for athletes and exercisers. While little data could be found in the sports nutrition literature specifically, it was revealed elsewhere that veganism creates challenges that need to be accounted for when designing a nutritious diet...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28910538/muscular-contraction-frequency-does-not-affect-plasma-homocysteine-concentration-in-response-to-energy-expenditure-and-intensity-matched-acute-exercise-in-sedentary-males
#7
Natalia Úbeda, Brian P Carson, Ángela García-González, Antonio Aguilar-Ros, Ángel Enrique Díaz-Martínez, Rafael Venta, Nicolás Terrados, Donal J O Gorman, Eduardo Iglesias-Gutiérrez
Acute exercise seems to increase total plasma homocysteine (tHcy). That is related to cardiovascular risk, therefore it is important to understand the determinants of its response to all types of exercise. The aim of this study was to examine the impact of cycling at two different rates of muscle contraction on the complete tHcy kinetics. Eight young sedentary males were required to complete two isocaloric (400 kcal) acute exercise trials at 50% VO2peak on separate occasions at 50 or 80 revolutions per minute (rpm)...
September 14, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28895788/association-between-serum-unmetabolized-folic-acid-concentrations-and-folic-acid-from-fortified-foods
#8
Cecília Zanin Palchetti, Clóvis Paniz, Eduardo de Carli, Dirce M Marchioni, Célia Colli, Josiane Steluti, Christine M Pfeiffer, Zia Fazili, Elvira Maria Guerra-Shinohara
OBJECTIVE: To investigate the association between serum unmetabolized folic acid (UMFA) concentrations and folic acid from fortified foods and nutrients known as dietary methyl-group donors (folate, methionine, choline, betaine and vitamins B2, B6 and B12) in participants exposed to mandatory fortification of wheat and maize flours with folic acid. METHODS: Cross-sectional study carried out with 144 healthy Brazilian participants, both sexes, supplement nonusers...
September 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28882898/switch-i-dependent-allosteric-signaling-in-a-g-protein-chaperone-b12-enzyme-complex
#9
Gregory C Campanello, Michael Lofgren, Adam L Yokom, Daniel R Southworth, Ruma Banerjee
G-proteins regulate various processes ranging from DNA replication and protein synthesis to cytoskeletal dynamics and cofactor assimilation, and serve as models for uncovering strategies deployed for allosteric signal transduction. MeaB is a multifunctional G-protein chaperone, which gates loading of the active 5'-deoxyadenosylcobalamin cofactor onto methylmalonyl-CoA mutase (MCM) and precludes loading of inactive cofactor forms. MeaB also safeguards MCM, which uses radical chemistry, against inactivation and rescues MCM inactivated during catalytic turnover by using the GTP-binding energy to offload inactive cofactor...
September 7, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28856433/effects-of-orthodox-religious-fasting-on-human-health-a-systematic-review
#10
REVIEW
Theocharis Koufakis, Spyridon Ν Karras, Vasiliki Antonopoulou, Eleni Angeloudi, Pantelis Zebekakis, Kalliopi Kotsa
PURPOSE: Different studies have pointed towards a positive effect of religious fasting on human health. Orthodox fasting (OF) regime could be characterized as a periodical vegetarian diet, demonstrating several common characteristics with the typical Mediterranean diet. The present systematic review aimed to synthesize available results regarding the potential impact of OF on human health. METHODS: Key biomedical databases were searched to identify studies examining the effects of OF on humans...
August 30, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28831845/examining-school-day-dietary-intakes-among-canadian-children
#11
Claire N Tugault-Lafleur, Jennifer L Black, Susan I Barr
Understanding how dietary intakes vary over the course of the school day can help inform targeted school-based interventions, but little is known about the distribution or determinants of school-day dietary intakes in Canada. This study examined differences between school-hour and non-school-hour dietary intakes and assessed demographic and socioeconomic correlates of school-hour diet quality among Canadian children. Nationally representative data from the Canadian Community Health Survey were analyzed using 24-h dietary recalls falling on school days in 2004 (n = 4827)...
August 23, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28825603/nutritional-adequacy-of-the-specific-carbohydrate-diet-in-pediatric-inflammatory-bowel-disease
#12
Kimberly Braly, Nila Williamson, Michele L Shaffer, Dale Lee, Ghassan Wahbeh, Jani Klein, Matthew Giefer, David L Suskind
INTRODUCTION: The Specific Carbohydrate Diet (SCD) is an exclusion diet used as a therapy in inflammatory bowel disease (IBD). The aim of this study was to evaluate the nutritional adequacy of the SCD. METHODS: Prospective dietary data over 12 weeks were analyzed for pediatric patients on the SCD. Intake of 20 key nutrients was compared to Dietary Recommended Intake (DRI) levels and nutrient intake data from similarly aged children from The National Health and Nutrition Examination Survey (NHANES) National Youth Fitness Survey (NNYFS) in 2012...
April 27, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28780092/whole-body-propionate-and-glucose-metabolism-of-multiparous-dairy-cows-receiving-folic-acid-and-vitamin-b12-supplements
#13
M Duplessis, H Lapierre, B Ouattara, N Bissonnette, D Pellerin, J-P Laforest, C L Girard
This study was undertaken to evaluate the effect of supplementation of folic acid and vitamin B12 on glucose and propionate metabolism. Twenty-four multiparous cows were assigned according to a complete block design in a 2 × 2 factorial arrangement to one of the following treatments: (1) saline 0.9% NaCl, (2) 320 mg of folic acid, (3) 10 mg of vitamin B12, or (4) 320 mg of folic acid and 10 mg of vitamin B12. Intramuscular injections were given weekly from 3 wk before the expected calving date until 9 wk postpartum...
August 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28754003/estimated-nutritive-value-of-low-price-model-lunch-sets-provided-to-garment-workers-in-cambodia
#14
Jan Makurat, Aarati Pillai, Frank T Wieringa, Chhoun Chamnan, Michael B Krawinkel
BACKGROUND: The establishment of staff canteens is expected to improve the nutritional situation of Cambodian garment workers. The objective of this study is to assess the nutritive value of low-price model lunch sets provided at a garment factory in Phnom Penh, Cambodia. METHODS: Exemplary lunch sets were served to female workers through a temporary canteen at a garment factory in Phnom Penh. Dish samples were collected repeatedly to examine mean serving sizes of individual ingredients...
July 21, 2017: Nutrients
https://www.readbyqxmd.com/read/28718824/associations-between-red-meat-intakes-and-the-micronutrient-intake-and-status-of-uk-females-a-secondary-analysis-of-the-uk-national-diet-and-nutrition-survey
#15
Emma Derbyshire
Blanket health messages to lower red meat intakes are being communicated at present. These could have adverse implications on the micronutrient quality of women's diets. The current paper evaluates the nutritional impact of lower red meat intakes on British women's micronutrient intakes and status. A secondary analysis of the UK National Diet and Nutrition Survey was undertaken using data from years 2008/2009 to 2011/2012. This was comprised of dietary and blood analyte data from 1384 and 641 females aged 11 to 64 years...
July 18, 2017: Nutrients
https://www.readbyqxmd.com/read/28710276/atp-binding-and-hydrolysis-disrupt-the-high-affinity-interaction-between-the-heme-abc-transporter-hmuuv-and-its-cognate-substrate-binding-protein
#16
COMPARATIVE STUDY
Hiba Qasem-Abdullah, Michal Perach, Nurit Livnat-Levanon, Oded Lewinson
Using the energy of ATP hydrolysis, ABC transporters catalyze the trans-membrane transport of molecules. In bacteria, these transporters partner with a high-affinity substrate-binding protein (SBP) to import essential micronutrients. ATP binding by Type I ABC transporters (importers of amino acids, sugars, peptides, and small ions) stabilizes the interaction between the transporter and the SBP, thus allowing transfer of the substrate from the latter to the former. In Type II ABC transporters (importers of trace elements, e...
September 1, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28708118/low-energy-turnover-of-physically-inactive-participants-as-a-determinant-of-insufficient-mineral-and-vitamin-intake-in-nhanes
#17
Juliane Heydenreich, Katarina Melzer, Céline Flury, Bengt Kayser
Micronutrient requirements do not scale linearly with physical activity-related energy expenditure (AEE). Inactive persons may have insufficient micronutrient intake because of low energy intake (EI). We extracted data from NHANES 2003-2006 on 4015 adults (53 ± 18 years (mean ± SD), 29 ± 6 kg/m², 48% women) with valid physical activity (accelerometry) and food intake (2 × 24 h-dietary recall) measures. Total energy expenditure (TEE) was estimated by summing the basal metabolic rate (BMR, Harris-Benedict), AEE, and 10% of TEE for the thermic effect of food, to calculate the physical activity levels (PAL = TEE/BMR)...
July 14, 2017: Nutrients
https://www.readbyqxmd.com/read/28671236/vitamin-b-supplementation-what-s-the-right-choice-for-your-patients
#18
Laura G Leahy
As many patients turn to vitamins and supplements to enhance energy, relieve fatigue, or generally feel better, it is important to understand the connection between the B vitamins and psychiatric symptomatology. Vitamins B6, B8, and B12 have been shown not only to reduce psychiatric symptoms but also shorten the duration of illness. Vitamin B9, also known as folate or folic acid, has also been associated with psychiatric symptoms. However, when patients lack a specific genetic enzyme, which converts folate/folic acid to its most usable form, L-methylfolate, the neuroprotective and neuropsychiatric benefits are lost...
July 1, 2017: Journal of Psychosocial Nursing and Mental Health Services
https://www.readbyqxmd.com/read/28627191/-associations-between-insulin-resistance-and-three-b-vitamins-in-european-adolescents-the-helena-study
#19
Iris Iglesia, Marcela González-Gross, Inge Huybrechts, Pilar De Miguel-Etayo, Denes Molnar, Yannis Manios, Kurt Widhalm, Frédéric Gottrand, Anthony Kafatos, Asensión Marcos, Alejandro De la O Puerta, Catherine Leclercq, Stefaan De Henauw, Peter Stehle, Mathilde Kersting, Theodora Mouratidou, Luis Alberto Moreno
OBJECTIVE: To assess whether adolescents with high body mass index (BMI), or fat mass index (FMI), in combination with insulin resistance (assessed with the Homeostatic Model Assessment [HOMA] index), had also lower blood vitamin B6, folate and vitamin B12 concentrations. METHODS AND MATERIALS: Six hundred and fifteen adolescents from the Healthy Lifestyle in Europe by Nutrition in Adolescence (HELENA) study, with data on B-vitamins (both intakes and status), and BMI, FMI, HOMA, were selected...
June 5, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/28606572/effect-of-dietary-fatty-acid-and-micronutrient-intake-energy-ratio-on-serum-diamine-oxidase-activity-in-healthy-women
#20
Makoto Miyoshi, Manami Ueno, Mari Matsuo, Yasuhiro Hamada, Michiko Takahashi, Masashi Yamamoto, Ikuko Yamamoto, Reiko Mikajiri, Satoko Tabuchi, Kumiko Wakida, Misa Yamanishi, Midori Hirai, Makoto Usami
OBJECTIVE: Serum diamine oxidase (DAO) activity varies to a greater extent in women than in men. DAO activity during the luteal phase was higher than that during the follicular phase in healthy women. Recent reports have indicated that duodenal lipid infusion increased DAO activity in the intestinal lymph in rats. The aim of this study was to elucidate the effect of dietary nutrient intake on serum DAO activity in healthy women. METHODS: Thirty-four healthy Japanese women were recruited...
July 2017: Nutrition
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