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Vitamin b12

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https://www.readbyqxmd.com/read/29150289/the-cause-of-multiple-sclerosis-is-autoimmune-attack-of-adenosyltransferase-thereby-limiting-adenosylcobalamin-production
#1
J L Boucher
The pathogenesis of multiple sclerosis (MS) begins with an infection by a bacterium from the class of bacteria that produce and utilize adenosylcobalamin (AdoCbl) and possess an adenosyl transferase enzyme (ATR); these bacteria are the exogenous antigens that cause MS. Human ATR is homologous to bacterial ATR and B cells produce anti-ATR antibodies as an autoimmune response thereby reducing the concentration of ATR and thus limiting production of AdoCbl, one of the two bioactive forms of vitamin B12. The next step in MS pathogenesis is a period of subclinical AdoCbl deficiency over a period of many years resulting in production of odd-carbon-number fatty acids that are incorporated into myelin rendering it antigenic...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29149073/micronutrient-deficiencies-among-breastfeeding-infants-in-tanzania
#2
Alexandra L Bellows, Emily R Smith, Alfa Muhihi, Christina Briegleb, Ramadhani A Noor, Salum Mshamu, Christopher Sudfeld, Honorati Masanja, Wafaie W Fawzi
Infant mortality accounts for the majority of child deaths in Tanzania, and malnutrition is an important underlying cause. The objectives of this cross-sectional study were to describe the micronutrient status of infants in Tanzania and assess predictors of infant micronutrient deficiency. We analyzed serum vitamin D, vitamin B12, folate, and ferritin levels from 446 infants at two weeks of age, 408 infants at three months of age, and 427 mothers three months post-partum. We used log-Poisson regression to estimate relative risk of being deficient in vitamin D and vitamin B12 for infants in each age group...
November 17, 2017: Nutrients
https://www.readbyqxmd.com/read/29143127/decreased-serum-vitamin-b12-and-vitamin-d-levels-affect-sleep-quality-in-children-with-familial-mediterranean-fever
#3
Rabia Miray Kisla Ekinci, Sibel Balci, Mahir Serbes, Dilek Dogruel, Derya Ufuk Altintas, Mustafa Yilmaz
Familial Mediterranean fever is an autoinflammatory disorder characterized by recurrent fever and serositis. We aimed to describe serum vitamin B12 and vitamin D levels and their correlation with self-reported sleep quality of pediatric FMF patients. Sixty-three children with FMF were enrolled to the study. Information on sleep quality was obtained using self-administration of Pittsburg Sleep Quality Index (PSQI). The patients were divided into subgroups depending on vitamin D serum concentrations: ≥ 20 and < 20 ng/ml...
November 15, 2017: Rheumatology International
https://www.readbyqxmd.com/read/29135286/vitamin-b12-supplementation-influences-methylation-of-genes-associated-with-type-2-diabetes-and-its-intermediate-traits
#4
Dilip K Yadav, Smeeta Shrestha, Karen A Lillycrop, Charu V Joglekar, Hong Pan, Joanna D Holbrook, Caroline Hd Fall, Chittaranjan S Yajnik, Giriraj R Chandak
AIM: To investigate the effect of B12 and/or folic acid supplementation on genome-wide DNA methylation. METHODS: We performed Infinium HumanMethylation450 BeadChip (Zymo Research, CA, USA) assay in children supplemented with B12 and/or folic acid (n = 12 in each group) and investigated the functional mechanism of selected differentially methylated loci. RESULTS: We noted significant methylation changes postsupplementation in B12 (589 differentially methylated CpGs and 2892 regions) and B12 + folic acid (169 differentially methylated CpGs and 3241 regions) groups...
November 14, 2017: Epigenomics
https://www.readbyqxmd.com/read/29133192/maternal-micronutrients-omega-3-fatty-acids-and-gene-expression-of-angiogenic-and-inflammatory-markers-in-pregnancy-induced-hypertension-rats
#5
Nisha Kemse, Deepali Sundrani, Anvita Kale, Sadhana Joshi
BACKGROUND AND AIMS: Preeclampsia is a disorder of pregnancy and is associated with inflammation and altered angiogenesis. The present study examines the effect of micronutrient and omega-3 fatty acid supplementation (individual, as well as combined) on genes involved in inflammation and angiogenesis, as well as global DNA methylation levels in a pregnancy induced hypertension (PIH) rat model. METHODS: Pregnant Wistar rats were randomly assigned to six dietary groups: control, PIH (Pregnancy induced hypertension) Induced; PIH Induced with micronutrient supplements with vitamin B12 (PIHB), folate (PIHF), omega-3 fatty acid (PIHO), and combined supplementation (PIHC) (micronutrients and omega-3 fatty acids)...
November 10, 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/29129471/higher-intake-of-fish-and-fat-is-associated-with-lower-plasma-s-adenosylhomocysteine-a-cross-sectional-study
#6
Mads V Lind, Lotte Lauritzen, Oluf Pedersen, Henrik Vestergaard, Ken D Stark, Torben Hansen, Alastair B Ross, Mette Kristensen
Several B-vitamins act as co-factors in one-carbon metabolism, a pathway that plays a central role in several chronic diseases. However, there is a lack of knowledge of how diet affects markers in one-carbon metabolism. The aim of this study was to explore dietary patterns and components associated with one-carbon metabolites. We hypothesized that intake of whole-grains and fish would be associated with lower Hcy, and higher SAM:SAH ratio due to their nutrient content. We assessed dietary information using a four-day dietary record in 118 men and women with features of the metabolic syndrome...
October 2, 2017: Nutrition Research
https://www.readbyqxmd.com/read/29129351/is-serum-methylmalonic-acid-a-reliable-biomarker-of-vitamin-b12-status-in-children-with-short-bowel-syndrome-a-case-series
#7
Lissette Jimenez, Danielle A Stamm, Brittany Depaula, Christopher P Duggan
We describe 3 patients with short bowel syndrome who had persistently elevated serum methylmalonic acid (MMA) levels while being treated for vitamin B12 deficiency. Following treatment for presumed small bowel bacterial overgrowth, MMA levels normalized. Among patients with short bowel syndrome, MMA levels may have limited specificity for vitamin B12 deficiency.
November 9, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/29129231/the-association-between-the-index-of-nutritional-quality-inq-and-breast-cancer-and-the-evaluation-of-nutrient-intake-of-breast-cancer-patients-a-case-control-study
#8
Farhad Vahid, Mahshid Hatami, Mahya Sadeghi, Fatemeh Ameri, Zeinab Faghfoori, Sayed Hossein Davoodi
OBJECTIVE: Breast cancer (BrCa) is the most frequently diagnosed cancer among females and second cancer after lung cancer in many societies. In Iran, the risk for BrCa is 1 in 35 and each year, 8000 new patients have been diagnosed with BrCa. Studies have shown that dietary components are implicated in the etiology of BrCa. The Index of Nutritional Quality (INQ) is a method of quantitative and qualitative analysis of single foods, meals, and diets. The aim of this study was to determine the usefulness of INQs in predicting BrCa risk...
January 2018: Nutrition
https://www.readbyqxmd.com/read/29121493/prevalence-of-consumption-and-nutritional-content-of-breakfast-meal-among-adolescents-from-the-brazilian-national-dietary-survey
#9
Jaqueline L Pereira, Michelle A de Castro, Sinead Hopkins, Carolyn Gugger, Regina M Fisberg, Mauro Fisberg
OBJECTIVE: To estimate the prevalence of breakfast consumption and describe the foods and nutrients consumed at this meal and throughout the day by Brazilian adolescents. METHOD: A total of 7276 adolescents aged 10-19 years were evaluated in the Brazilian National Dietary Survey 2008-9, a population-based cross-sectional study. Individuals' information was collected at home. Dietary data were obtained by two food records. Breakfast was defined as the first eating occasion of the day that occurred between 6 and 9:59am...
November 6, 2017: Jornal de Pediatria
https://www.readbyqxmd.com/read/29120005/peripheral-neuropathy-due-to-recreational-use-of-nitrous-oxide-presenting-after-an-ankle-sprain-with-foot-drop
#10
Jackson A Middleton, John A Roffers
A 22-year-old man was referred for orthopedic follow-up after an ankle injury. Initial evaluation in urgent care included radiographs with negative findings. After a delayed presentation, a course of functional treatment was recommended. Subsequently, he developed a deep venous thrombosis and pulmonary emboli. He was found to be factor V Leiden deficient and was fully anticoagulated on warfarin. Later reevaluation revealed a steppage gait and foot drop. Electrodiagnostic studies (ie, electromyography and nerve conduction studies) revealed a severe peripheral polyneuropathy...
November 8, 2017: Orthopedics
https://www.readbyqxmd.com/read/29118161/dietary-nutrient-intake-ethnicity-and-epigenetic-silencing-of-lung-cancer-genes-detected-in-sputum-in-new-mexican-smokers
#11
Shuguang Leng, Maria A Picchi, Huining Kang, Guodong Wu, Piotr T Filipczak, Daniel E Juri, Xiequn Zhang, W James Gauderman, Frank D Gilliland, Steven A Belinsky
Lung cancer (LC) gene methylation detected in sputum assesses field cancerization and predicts LC incidence. Hispanic smokers have higher LC susceptibility compared to non-Hispanic Whites (NHW). We aimed to identify novel dietary nutrients affecting LC gene methylation and determine the degree of ethnic disparity in methylation explained by diet. Dietary intakes of 139 nutrients were assessed using a validated Harvard food frequency questionnaire in 327 Hispanics and 1502 NHWs from the Lovelace Smokers cohort (LSC)...
November 8, 2017: Cancer Prevention Research
https://www.readbyqxmd.com/read/29117460/maternal-folic-acid-use-during-pregnancy-mthfr-polymorphism-and-child-s-lung-function-and-asthma
#12
Herman T den Dekker, Vincent W V Jaddoe, Irwin K Reiss, Johan C de Jongste, Liesbeth Duijts
BACKGROUND: Folic acid supplement use during pregnancy might affect childhood respiratory health, potentially mediated by methylenetetrahydrofolate-reductase polymorphism C677T (MTHFR-C677T) carriership. OBJECTIVES: We examined the associations of maternal folic acid supplement use and folate, vitamin B12 and homocysteine concentrations during pregnancy with childhood lung function and asthma. METHODS: This study was embedded in a population-based prospective cohort study among 5,653 children...
November 8, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29116560/preoperative-and-postoperative-assessments-of-biochemical-parameters-in-patients-with-severe-obesity-undergoing-laparoscopic-sleeve-gastrectomy
#13
Deborah M Gregory, Laurie K Twells, Kendra K Lester, William K Midodzi, Mette Rode Pedersen, David Pace, Chris Smith, Darrell Boone, Edward W Randell, Christopher S Kovacs
BACKGROUND: The study aim was to determine the prevalence of abnormal serum biochemistries associated with micronutrient deficiencies before and after laparoscopic sleeve gastrectomy (LSG). METHODS: Two hundred and one patients had LSG surgery between May 2011 and May 2014. Using a prospective cohort study design, data were collected on ferritin, hemoglobin (Hgb), mean cell volume (MCV), calcium, albumin, 25-hydroxyvitamin D (25-OH-D), PTH, and vitamin B12 with follow-up of 75...
November 8, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/29115801/the-relationship-between-the-vitamin-serum-25-oh-d-and-the-b12-concentrations-in-obese-women
#14
Nikola Curic, Branislava Ilincic, Natasa Milic, Velibor Cabarkapa, Stanislava Nikolic, Milica Medic-Stojanoska, Rinaldo Pellicano, Ludovico Abenavoli
BACKGROUND: In obesity, low levels of vitamin D (VD) and vitamin B12 (VB12), may be the result of different pathophysiological mechanisms, but the possible association between them has not yet been defined. The aim of this cross-sectional analysis was to investigate the possible relationship between serum 25-hydroxyvitamin D (25(OH)D) and VB12 levels in middle aged women. METHODS: In 80 women, we indirectly evaluated body composition and body volumes [extracellular fluid volume (ECV) and total body water (TBW)] by anthropometric and bioelectrical impedance analysis...
November 7, 2017: Minerva Medica
https://www.readbyqxmd.com/read/29113155/poems-syndrome-presentation-with-progressive-weakness-in-upper-and-lower-limbs-a-case-report
#15
Chuang-Jie Cao, Cheng-Yun Dou, Ke-Hua Zhou, Jin-Bo Liu, Hong Lai
Polyneuropathy, organomegaly, endocrinopathy, M proteins, and skin changes (POEMS) syndrome is a rare variant of plasma cell disorders with multiple systemic manifestations. A 50-year-old female patient presented with progressive weakness in her upper and lower limbs; tingling, numbness and burning in her feet; polyneuropathy (demyelinating in the majority of cases of POEMS syndrome); monoclonal plasma cell disorder (typicallyλ-restricted in cases of POEMS syndrome); sclerotic lesions on the spine and pelvis; organomegaly, including hepatomegaly, splenomegaly and lymphadenopathy; edema; pleural effusion; adrenal, thyroidal, pituitary, gonadal and pancreatic endocrinopathy; skin changes, including hyperpigmentation, dry skin and hypertrichosis; thrombocytosis; pulmonary hypertension; low vitamin B12 and weight loss...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29113038/micronutrient-dietary-intake-in-latina-pregnant-adolescents-and-its-association-with-level-of-depression-stress-and-social-support
#16
Angelie Singh, Caroline Trumpff, Jeanine Genkinger, Alida Davis, Marisa Spann, Elizabeth Werner, Catherine Monk
Adolescent pregnant women are at greater risk for nutritional deficits, stress, and depression than their adult counterparts, and these risk factors for adverse pregnancy outcomes are likely interrelated. This study evaluated the prevalence of nutritional deficits in pregnant teenagers and assessed the associations among micronutrient dietary intake, stress, and depression. One hundred and eight pregnant Latina adolescents completed an Automated Self-Administered 24-hour dietary recall (ASA24) in the 2nd trimester...
November 4, 2017: Nutrients
https://www.readbyqxmd.com/read/29112785/associated-conditions-in-small-fiber-neuropathy-a-large-cohort-study-and-review-of-the-literature
#17
Bianca T A de Greef, Janneke G J Hoeijmakers, Carla M L Gorissen-Brouwers, Margot Geerts, Catharina G Faber, Ingemar S J Merkies
BACKGROUND: Small fiber neuropathy (SFN) is a common disorder, leading to neuropathic pain and autonomic symptoms. The objective of this study was to investigate associated conditions in a large cohort of SFN patients and compare the prevalence to healthy individuals. METHODS: A total of 921 patients with pure SFN were screened according to a standardized comprehensive diagnostic algorithm and compared with literature findings. RESULTS: In 53% of the patients, no associated condition could be found...
November 7, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29110539/nutritional-and-bioactive-compounds-of-commercialized-algae-powders-used-as-food-supplements
#18
Ginés B Martínez-Hernández, Noelia Castillejo, María Del M Carrión-Monteagudo, Francisco Artés, Francisco Artés-Hernández
The main nutritional/bioactive compounds (protein; aminoacids, AA; fucose; minerals; vitamins B12 and C; and total phenolic content, TPC) of nine commercial algae powders, used as food supplements, were studied. Undaria pinnatifida showed the highest protein/aminoacid contents (51.6/54.4 g 100 g(-1)). Among brown macroalgae, Himanthalia elongata showed the highest fucose content (26.3 g kg(-1)) followed by Laminaria ochroleuca (22.5 g kg(-1)). Mineral contents of 15-24% were observed in the algae, being particularly excellent sources of iodine (69...
January 1, 2017: Food Science and Technology International, Ciencia y Tecnología de Los Alimentos Internacional
https://www.readbyqxmd.com/read/29109962/micronutrient-intake-in-a-cohort-of-italian-adults-with-type-1-diabetes-adherence-to-dietary-recommendations
#19
Marisa Giorgini, Marilena Vitale, Lutgarda Bozzetto, Ornella Ciano, Angela Giacco, Anna Rivieccio, Ilaria Calabrese, Gabriele Riccardi, Angela A Rivellese, Giovanni Annuzzi
Micronutrients are of fundamental importance in maintaining health status. However, data on their dietary intake are few particularly in persons with diabetes. The aim of this study was to evaluate in adults with type 1 diabetes (T1DM) attending a tertiary-level diabetes center in Southern Italy the intake of micronutrients (both vitamins and minerals) and the adherence to recommendations. Seven-day food records of 60 T1DM patients were analyzed. Micronutrient intake was evaluated based on the Italian food composition tables and expressed as amount per 1000 kcal of energy intake to adjust for possible underreporting...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/29106396/purinyl-cobamide-is-a-native-prosthetic-group-of-reductive-dehalogenases
#20
Jun Yan, Meng Bi, Allen K Bourdon, Abigail T Farmer, Po-Hsiang Wang, Olivia Molenda, Andrew T Quaile, Nannan Jiang, Yi Yang, Yongchao Yin, Burcu Şimşir, Shawn R Campagna, Elizabeth A Edwards, Frank E Löffler
Cobamides such as vitamin B12 are structurally conserved, cobalt-containing tetrapyrrole biomolecules that have essential biochemical functions in all domains of life. In organohalide respiration, a vital biological process for the global cycling of natural and anthropogenic organohalogens, cobamides are the requisite prosthetic groups for carbon-halogen bond-cleaving reductive dehalogenases. This study reports the biosynthesis of a new cobamide with unsubstituted purine as the lower base and assigns unsubstituted purine a biological function by demonstrating that Coα-purinyl-cobamide (purinyl-Cba) is the native prosthetic group in catalytically active tetrachloroethene reductive dehalogenases of Desulfitobacterium hafniense...
November 6, 2017: Nature Chemical Biology
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