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https://www.readbyqxmd.com/read/28821482/hypersegmented-neutrophils-and-oval-macrocytes-in-the-setting-of-b12-deficiency-and-pancytopaenia
#1
Sean James Farrelly, Kieran Anthony O'Connor
Vitamin B12 deficiency is a recognised pathology in several populations, with a particular prevalence in an older adult population. We present two cases whereby vitamin B12 deficiency is the causative factor in marked pancytopaenia. Oval macrocytosis and hypersegmented neutrophils were noted on both peripheral blood samples, which are a characteristic finding in macrocytic anaemia due to B12 deficiency. Distinct underlying pathologies were identified in both cases; food-cobalamin malabsorption and pernicious anaemia...
August 17, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28818841/distinct-intestinal-adaptation-for-vitamin-b12-and-bile-acid-absorption-revealed-in-a-new-mouse-model-of-massive-ileocecal-resection
#2
Yuka Matsumoto, Wakana Mochizuki, Shintaro Akiyama, Taichi Matsumoto, Kengo Nozaki, Mamoru Watanabe, Tetsuya Nakamura
Ileocecal resection (ICR), one of several types of intestinal resection that results in short bowel syndrome (SBS), causes severe clinical disease in humans. We here describe a mouse model of massive ICR in which 75% of the distal small intestine is removed. We demonstrate that mice underwent 75% ICR show severe clinical signs and high mortality, which may recapitulate severe forms of human SBS, despite an adaptive response throughout the remnant intestine. By using this model, we also investigated whether the epithelium of the remnant intestine shows enhanced expression of factors involved in region-specific functions of the ileum...
August 17, 2017: Biology Open
https://www.readbyqxmd.com/read/28816346/homocysteine-lowering-interventions-for-preventing-cardiovascular-events
#3
REVIEW
Arturo J Martí-Carvajal, Ivan Solà, Dimitrios Lathyris, Mark Dayer
BACKGROUND: Cardiovascular disease, which includes coronary artery disease, stroke and peripheral vascular disease, is a leading cause of death worldwide. Homocysteine is an amino acid with biological functions in methionine metabolism. A postulated risk factor for cardiovascular disease is an elevated circulating total homocysteine level. The impact of homocysteine-lowering interventions, given to patients in the form of vitamins B6, B9 or B12 supplements, on cardiovascular events has been investigated...
August 17, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28816120/b-vitamins-in-stroke-prevention-time-to-reconsider
#4
REVIEW
J David Spence, Qilong Yi, Graeme J Hankey
B vitamin therapy lowers plasma total homocysteine concentrations, and might be a beneficial intervention for stroke prevention; however, cyanocobalamin (a form of vitamin B12) can accelerate decline in renal function and increase the risk of cardiovascular events in patients with impaired renal function. Although early trials did not show benefit in reduction of stroke, these results might have been due to harm in participants with impaired renal function. In patients with diabetic nephropathy, cyanocobalamin is harmful, whereas B vitamins appear to reduce cardiovascular events in study participants with normal renal function...
September 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28809129/effect-of-methotrexate-vitamin-b12-on-dna-methylation-as-a-potential-factor-in-leukemia-treatment-related-neurotoxicity
#5
Victoria J Forster, Alex McDonnell, Rachel Theobald, Jill A McKay
Methotrexate (MTX) is administered to treat childhood acute lymphoblastic leukemia (ALL). It acts by inhibiting dihydrofolate reductase which reduces methyltetrahydrofolate, a key component in one carbon metabolism, thus reducing cell proliferation. Further perturbations to one carbon metabolism, such as reduced vitamin B12 levels via the use of nitrous oxide for sedation during childhood ALL treatment, may increase neurotoxicity risk. With B12 as an enzymatic cofactor, methyltetrahydrofolate is essential to produce methionine, which is critical for DNA methylation...
August 15, 2017: Epigenomics
https://www.readbyqxmd.com/read/28807660/the-changing-cost-to-prevent-diabetes-a-retrospective-analysis-of-the-diabetes-prevention-program
#6
Nicholas W Carris, Feng Cheng, William N Kelly
OBJECTIVES: Diabetes prevention interventions are poorly implemented. While health care costs generally increase, 2 factors affect the relative cost of diabetes prevention interventions: the declining cost of metformin (even without insurance) and the new recommendation for vitamin B12 monitoring during metformin treatment. The study's objective was to update the relative health system cost estimate of metformin for diabetes prevention by incorporating the current health system cost of metformin and the cost of addressing potential metformin-associated vitamin B12 deficiency...
August 11, 2017: Journal of the American Pharmacists Association: JAPhA
https://www.readbyqxmd.com/read/28806113/-hungarian-diet-and-nutritional-status-survey-the-otap2014-study-v-vitamin-intake-of-the-hungarian-population
#7
Erzsébet Schreiberné Molnár, Zsuzsanna Nagy-Lőrincz, Barbara Nagy, Márta Bakacs, Orsolya Kis, Eszter Sarkadi Nagy, Éva Martos
INTRODUCTION AND AIM: The Hungarian Diet and Nutritional Status Survey was implemented on a sub-sample of the European Health Interview Survey. In this paper, the authors present the data on the vitamin intake of the Hungarian population. METHOD: The survey represents the vitamin intake of the Hungarian non-institutionalised adult population of 18 years and older. There are significant differences between men's and women's vitamin intake. RESULTS: The intake of all water-soluble vitamins except for vitamin C is higher in men than in women, and the difference between the genders regarding the intake of vitamin E and D is significant...
August 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28803010/short-communication-apparent-ruminal-synthesis-of-b-vitamins-in-lactating-dairy-cows-fed-saccharomyces-cerevisiae-fermentation-product
#8
D S Castagnino, Y Ying, M S Allen, R Gervais, P Y Chouinard, C L Girard
Apparent ruminal synthesis and duodenal flow of thiamin, riboflavin, niacin, vitamin B6, folates, and vitamin B12 were evaluated in an experiment using 15 ruminally and duodenally cannulated lactating Holstein cows fed a basal diet, according to a crossover design, supplemented or not with 56 g/d of Saccharomyces cerevisiae fermentation product. Duration of the treatment period was 28 d. The basal ration had 28% neutral detergent fber, 30% starch and 16.5% crude protein; forages were corn silage (67% of forage dry matter) and alfalfa silage (33% of forage dry matter)...
August 9, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28802222/impact-of-the-corrin-framework-of-vitamin-b12-on-the-electrochemical-carbon-skeleton-rearrangement-in-comparison-to-an-imine-oxime-planar-ligand-tuning-selectivity-in-1-2-migration-of-a-functional-group-by-controlling-electrolysis-potential
#9
Keishiro Tahara, Ling Pan, Ryoko Yamaguchi, Hisashi Shimakoshi, Masaaki Abe, Yoshio Hisaeda
Among the coenzyme B12-dependent enzymes, methylmalonyl-CoA mutase (MMCM) catalyzes the carbon-skeleton rearrangement reaction between R-methylmalonyl-CoA and succinyl-CoA. Diethyl 2-bromomethyl-2-phenylmalonate, an alkyl bromide substrate having two different migrating groups (phenyl and carboxylic ester groups) on the β-carbon, was applied to the electrolysis mediated by a hydrophobic vitamin B12 model complex, heptamethyl cobyrinate perchlorate in this study. The electrolysis of the substrate at -1.0V vs...
July 23, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28799782/effects-of-nutrient-and-bioactive-food-components-on-alzheimer-s-disease-and-epigenetic
#10
Elİf Celİk, Nevİn Sanlİer
Alzheimer's disease (AD) is the most common form of dementia in the elderly and is a chronic neurodegenerative disease that is becoming widespread. For this reason, in recent years factors affecting the development, progression and cognitive function of the AD have been emphasized. Nutrients and other bioactive nutrients are among the factors that are effective in AD. In particular, vitamins A, C and E, vitamins B1, B6 and B12, folate, magnesium, choline, inositol, anthocyanins, isoflavones etc. nutrients and bioactive nutrients are known to be effective in the development of AD...
August 11, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28799141/trace-element-and-vitamin-concentrations-in-paediatric-dialysis-patients
#11
Triona Joyce, Frances Court Brown, Dean Wallace, Christopher J D Reid, Manish D Sinha
BACKGROUND: There are few recent data regarding blood micronutrient concentrations and supplementation in children on maintenance dialysis. We investigated micronutrient concentrations following dialysis commencement. METHODS: Retrospective review, including all children on maintenance dialysis (peritoneal dialysis, PD; intermittent haemodialysis, IHD), for nutritional blood concentrations measured over the first 12 months. Patients received pyridoxine and Dialyvit® daily with planned 3-monthly micronutrient concentration monitoring including selenium, manganese, copper, zinc, folate and vitamins A, D, B12 and E...
August 10, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28798917/corrigendum-biomarkers-and-algorithms-for-the-diagnosis-of-vitamin-b12-deficiency
#12
Luciana Hannibal, Vegard Lysne, Anne-Lise Bjørke-Monsen, Sidney Behringer, Sarah C Grünert, Ute Spiekerkoetter, Donald W Jacobsen, Henk J Blom
[This corrects the article on p. 27 in vol. 3, PMID: 27446930.].
2017: Frontiers in Molecular Biosciences
https://www.readbyqxmd.com/read/28797832/subacute-progressive-myelopathy-transverse-myelitis-or-subacute-combined-degeneration-a-case-report
#13
Daniel Goldish, Teresa L Massagli
Evolving subacute myelopathies have many possible etiologies. This is a report of a patient who presented with progressive paresthesias, proprioceptive loss, and gait disturbance with acute myelitis seen on Magnetic Resonance Imaging initially concerning for transverse myelitis. However, she also had vitamin B12 deficiency and her clinical course ultimately suggested a diagnosis more compatible with subacute combined degeneration. The clinical features, laboratory and imaging findings and prognosis of the two disorders are compared...
August 7, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28795706/photocatalytic-alkene-reduction-by-a-b12-tio2-hybrid-catalyst-coupled-with-c-f-bond-cleavage-for-gem-difluoroolefin-synthesis
#14
Hui Tian, Hisashi Shimakoshi, Kenji Imamura, Yoshihito Shiota, Kazunari Yoshizawa, Yoshio Hisaeda
Photocatalytic syntheses of gem-difluoroolefins were performed using the B12-TiO2 hybrid catalyst during the C[double bond, length as m-dash]C bond reduction of α-trifluoromethyl styrenes with C-F bond cleavage at room temperature under nitrogen. The gem-difluoroolefins were used as synthetic precursors for fluorinated cyclopropanes.
August 10, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28794451/vitamin-b12-as-a-carrier-of-peptide-nucleic-acid-pna-into-bacterial-cells
#15
Marcin Równicki, Monika Wojciechowska, Aleksandra J Wierzba, Jakub Czarnecki, Dariusz Bartosik, Dorota Gryko, Joanna Trylska
Short modified oligonucleotides targeted at bacterial DNA or RNA could serve as antibacterial agents provided that they are efficiently taken up by bacterial cells. However, the uptake of such oligonucleotides is hindered by the bacterial cell wall. To overcome this problem, oligomers have been attached to cell-penetrating peptides, but the efficiency of delivery remains poor. Thus, we have investigated the ability of vitamin B12 to transport peptide nucleic acid (PNA) oligomers into cells of Escherichia coli and Salmonella Typhimurium...
August 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28792705/homocysteine-metabolism-and-hematological-parameters-in-early-stage-of-phenytoin-treated-epileptic-children
#16
Tarun K Sharma, S K Vardey, S Sitaraman
BACKGROUND: Long-term antiepileptic drug (AED) therapy has been associated with metabolic consequences that lead to an increase in risk of atherosclerosis in patients with epilepsy. Earlier published studies showed conflicting results about the levels of hematological parameters, serum homocysteine, folate, and vitamin B12, in epileptics treated with phenytoin monotherapy. Therefore, we evaluated homocysteine metabolism and hematological parameters in early stage of phenytoin treated epileptic children...
July 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28791814/the-effects-of-recombinant-human-granulocyte-colony-stimulating-factor-mouthwash-on-radiotherapy-induced-oral-mucositis-in-locally-advanced-nasopharyngeal-carcinoma-patients
#17
Gai Liang, Wei Du, Qinghua Ke, Bing Huang, Jiyuan Yang
BACKGROUND: Acute oral mucositis is a common complication of radiotherapy for nasopharyngeal carcinoma (NPC) patients. OBJECTIVES: The aim of the study was to observe the effects of recombinant human granulocyte colony-stimulating factor (rhG-CSF) on radiotherapy-induced oral mucositis in locally advanced NPC patients. MATERIAL AND METHODS: The study involved 64 locally advanced NPC patients that were randomly allocated to receive either rhG-CSF mouthwash (2 μg/mL rhG-CSF; group A, n = 34) or a compounded mouth rinse (10 μg/mL vitamin B12, 0...
May 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28789684/blood-lead-cadmium-and-mercury-in-relation-to-homocysteine-and-c-reactive-protein-in-women-of-reproductive-age-a-panel-study
#18
Anna Z Pollack, Sunni L Mumford, Lindsey Sjaarda, Neil J Perkins, Farah Malik, Jean Wactawski-Wende, Enrique F Schisterman
BACKGROUND: To examine the relationship between cadmium, lead, and mercury concentrations with high-sensitivity C-reactive protein (hs-CRP) and homocysteine in women. METHODS: Metals were measured at enrollment in whole blood. Homocysteine and hs-CRP were measured in one (N = 9) or two (N = 250) menstrual cycles up to 3 and 8 times per cycle, respectively. Linear mixed models with inverse probability of exposure weights to account for time varying confounding were used and models were stratified by dietary and serum vitamin status (dietary: vitamin B6, B12, folate; serum: folate)...
August 8, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28780990/folate-and-vitamin-b12-status-is-associated-with-insulin-resistance-and-metabolic-syndrome-in-morbid-obesity
#19
Zhen Li, Rosa-Maria Gueant-Rodriguez, Didier Quilliot, Marie-Aude Sirveaux, David Meyre, Jean-Louis Gueant, Laurent Brunaud
BACKGROUND: Low vitamin B12 and high folate during pregnancy are associated with visceral obesity and insulin resistance in offspring. In the general population, high folate exacerbates the increase of methylmalonic acid, a marker of vitamin B12 deficiency. However, the influence of vitamin B12 and folate and their related markers on insulin resistance and metabolic syndrome remains unknown in severe obesity. AIM: To evaluate the influence of vitamin B12 and folate on HOMA-IR and components of metabolic syndrome in severe obesity...
July 24, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28780095/short-communication-effect-of-fatty-acid-supplements-on-apparent-ruminal-synthesis-of-b-vitamins-in-lactating-dairy-cows
#20
D S Castagnino, K J Harvatine, M S Allen, R Gervais, P Y Chouinard, C L Girard
The effect of fat supplements (FS) providing different proportions of saturated (SFA) and unsaturated (UFA) fatty acids on supply, apparent ruminal synthesis (ARS), and duodenal flow (DF) of some B vitamins (thiamine, riboflavin, niacin, vitamin B6, folates, and vitamin B12) were evaluated in an experiment using 8 ruminally and duodenally cannulated lactating Holstein cows. The experiment was a replicated 4 × 4 Latin square design with 21-d treatment periods. The 4 treatments were a control diet without fatty acid supplement and 3 diets with 2...
August 2, 2017: Journal of Dairy Science
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