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Vitamin b12

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https://www.readbyqxmd.com/read/29783174/facile-isolation-of-%C3%AE-ribazole-from-vitamin-b-12-hydrolysates-using-boronate-affinity-chromatography
#1
Theodoric A Mattes, Jorge C Escalante-Semerena
Alpha-ribazole (α-R) is a unique riboside found in the nucleotide loop of coenzyme B12 (CoB12 ). α-R is not an intermediate of the de novo biosynthetic pathway of coenzyme B12 , but some bacteria of the phylum Firmicutes have evolved a two-protein system (transporter, kinase) that scavenges α-R from the environment and converts it to the pathway intermediate α-RP. Since α-R is not commercially available, one must either synthesize α-R, or isolate it from hydrolysates of vitamin B12 (cyano-B12 , CNB12 ), so the function of the above-mentioned proteins can be studied...
May 16, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29782429/early-results-of-laparoscopic-sleeve-gastrectomy-with-loop-bipartition
#2
Ergin Arslan, Mesut Sipahi, Oktay Banli
PURPOSE: We evaluated early results of this new procedure of transit loop bipartition with sleeve gastrectomy (TLB-SG), making a comparison with transit bipartition with sleeve gastrectomy. MATERIALS AND METHODS: Between January 2017 and September 2017, 22 patients have undergone transit bipartition with sleeve gastrectomy or TLB-SG surgery in our clinic. Patients' body mass index, excess body mass index loss, and HOMA-IR were calculated before and after the surgical operation...
May 18, 2018: Surgical Laparoscopy, Endoscopy & Percutaneous Techniques
https://www.readbyqxmd.com/read/29779954/construction-of-fluorescent-analogs-to-follow-the-uptake-and-distribution-of-cobalamin-vitamin-b-12-in-bacteria-worms-and-plants
#3
Andrew D Lawrence, Emi Nemoto-Smith, Evelyne Deery, Joseph A Baker, Susanne Schroeder, David G Brown, Jennifer M A Tullet, Mark J Howard, Ian R Brown, Alison G Smith, Helena I Boshoff, Clifton E Barry, Martin J Warren
Vitamin B12 is made by only certain prokaryotes yet is required by a number of eukaryotes such as mammals, fish, birds, worms, and Protista, including algae. There is still much to learn about how this nutrient is trafficked across the domains of life. Herein, we describe ways to make a number of different corrin analogs with fluorescent groups attached to the main tetrapyrrole-derived ring. A further range of analogs were also constructed by attaching similar fluorescent groups to the ribose ring of cobalamin, thereby generating a range of complete and incomplete corrinoids to follow uptake in bacteria, worms, and plants...
April 28, 2018: Cell Chemical Biology
https://www.readbyqxmd.com/read/29779803/maternal-intake-of-milk-and-milk-proteins-is-positively-associated-with-birth-weight-a-prospective-observational-cohort-study
#4
A Mukhopadhyay, P Dwarkanath, S Bhanji, S Devi, A Thomas, A V Kurpad, T Thomas
BACKGROUND: A striking number of low birth weight (LBW) Indian babies are born annually. Previous studies have confirmed the positive association between milk intake and birth weight. However, the relations between protein and vitamin B12 from milk and birth weight have not been systematically explored. AIMS: We examined the relations between birth weight and maternal intake of milk, protein from milk and vitamin B12 from milk. METHODS: This prospective, observational cohort study was conducted in an urban South Indian hospital...
June 2018: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/29777755/folic-acid-and-primary-prevention-of-neural-tube-defects-a-review
#5
REVIEW
Jan D van Gool, Herbert Hirche, Hildegard Lax, Luc De Schaepdrijver
With 4 mg folic acid daily, it may take 20 weeks to reach red-blood-cell folate levels between 1,050 and 1,340 nmol/L, optimal for reduction of the neural tube defect risk. Therefore, folic acid supplementation should be started 5-6 months before conception. The residual risk with optimal red-blood-cell folate levels is reportedly 4.5 per 10,000 total births. The residual risk in pooled data from countries with mandatory folic acid fortification is 7.5 per 10,000 pregnancies, regardless of pre-fortification rates...
May 16, 2018: Reproductive Toxicology
https://www.readbyqxmd.com/read/29777621/serum-high-density-lipoprotein-cholesterol-is-a-protective-predictor-of-executive-function-in-older-patients-with-diabetes-mellitus
#6
Yue Sun, Jenny Lee, Ronald C Ma, Timothy Kwok
INTRODUCTION: Older people with diabetes mellitus (DM) are at high risk for cognitive impairment or dementia. The clinical predictors for cognitive decline in older people with DM were elucidated. METHODS: This was a secondary analysis of a vitamin B12 intervention trial in older people with DM. 271 non-demented subjects were followed up at nine months interval for 27 months. We explored the association between baseline clinical features with changes in cognitive measures (clinical dementia rating scale, neuropsychological test battery including executive function z scores, psychomotor speed z scores and memory z scores)...
May 19, 2018: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/29777237/dna-methylation-variant-b-vitamins-intake-and-longitudinal-change-in-body-mass-index
#7
Xiang Li, Tiange Wang, Min Zhao, Tao Huang, Dianjianyi Sun, Liyuan Han, Hoirun Nisa, Xiaoyun Shang, Yoriko Heianza, Lu Qi
BACKGROUND: Growing evidence has implicated DNA methylation (DNAm) in the regulation of body adiposity; a recent epigenome-wide association study (EWAS) identified a genetic variant determining DNAm at the SREBF1 gene that affected body mass index (BMI). OBJECTIVE: In the present study, we tested interactions between DNAm variant rs752579 and methylation metabolism-related B-vitamins (folate, vitamin B2 , vitamin B6 , and vitamin B12 ) on longitudinal change in BMI in the Women's Health Initiative Memory Study (WHIMS)...
May 17, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29776960/effect-of-combined-treatment-with-folic-acid-vitamin-b-6-and-vitamin-b-12-on-plasma-biomarkers-of-inflammation-and-endothelial-dysfunction-in-women
#8
William G Christen, Nancy R Cook, Martin Van Denburgh, Elaine Zaharris, Christine M Albert, JoAnn E Manson
BACKGROUND: The aim of this study was to determine whether reducing plasma homocysteine concentrations with long-term, combined treatment with folic acid, vitamin B6 , and vitamin B12 alters plasma biomarkers of inflammation and endothelial dysfunction in women at increased risk of cardiovascular disease. METHODS AND RESULTS: We conducted a blood substudy of 300 treatment-adherent participants (150 in the active treatment group, 150 in the placebo group) in the WAFACS (Women's Antioxidant and Folic Acid Cardiovascular Study), a randomized, double-blind, placebo-controlled trial testing a daily combination of folic acid (2...
May 18, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29774652/nonscarring-diffuse-hair-loss-in-women-a-clinico-etiological-study-from-tertiary-care-center-in-north-west-india
#9
Kavita Poonia, Gurvinder Pal Thami, Mala Bhalla, Shivani Jaiswal, Jasleen Sandhu
BACKGROUND: Diffuse hair loss (DHL) is a common problem in adult women and has a major impact on quality of life. Ascertaining the etiological diagnosis is a challenging task in such patients. Satisfactory treatment can only be instituted after ascertaining the cause of hair loss. OBJECTIVE: To study the clinico-epidemiological profile of nonscarring DHL in females and to ascertain its underlying etiological factors. STUDY DESIGN: Of a total of 110 females, who presented with nonscarring DHL to the outpatient dermatology department, 100 qualified for inclusion in the study...
May 17, 2018: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29774568/effects-of-plasma-proteins-on-the-transport-and-surface-characteristics-of-polysulfone-polyethersulfone-and-asymmetric-cellulose-triacetate-high-flux-dialyzers
#10
Tae Ryung Kim, Mahsa Hadidi, Seyed Pouria Motevalian, Takashi Sunohara, Andrew L Zydney
Blood-membrane interactions can have a large impact on the performance of hemodialysis membranes, particularly for high flux membranes in which the membrane itself provides very low resistance to solute transport. The objective of this study was to examine the effects of exposure to serum on the solute clearance and convective sieving characteristics of high flux polysulfone (Optiflux F250NR), polyethersulfone (ELISIO-25H), and asymmetric cellulose triacetate (SOLACEA-25H) hemodialyzers using both vitamin B12 and a range of polydisperse dextrans...
May 17, 2018: Artificial Organs
https://www.readbyqxmd.com/read/29773950/could-autism-be-associated-with-nutritional-status-in-the-palestinian-population-the-outcomes-of-the-palestinian-micronutrient-survey
#11
Mohammad Altamimi
Background: Autism spectrum disorder is a neurodevelopmental disorder. It is believed that the cause of autism is multifactorial, where genetic predispositions interact with environmental factors. In this context, micronutrients play a crucial role. Objective: To present evidence on current micronutrient status in Palestine and highlight its possible role in increasing problems of neurodevelopment disorders in general and autism in particular. Method: Analytical review of results...
2018: Nutrition and Metabolic Insights
https://www.readbyqxmd.com/read/29773468/determination-of-vitamin-b-12-in-equine-urine-by-liquid-chromatography-inductively-coupled-plasma-mass-spectrometry
#12
Ross Wenzel, Derek Major, Karly Hesp, Philip Doble
Regulating authorities in the racing industry have restricted the administration of potentially performance enhancing cobalt salts to horses. There are severe penalties for trainers presenting horses with elevated urine cobalt concentrations, and compliance is ensured via analysis of total urinary cobalt at thresholds of 100 μg/L. When cobalt is present as part of the cobalamin molecule it is not considered performance enhancing. This paper demonstrates that a horse can excrete a significant proportion of a commercially available vitamin B12 injection in urine without metabolic modification...
May 9, 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29772225/maternal-one-carbon-metabolism-through-increased-oxidative-stress-and-disturbed-angiogenesis-can-influence-placental-apoptosis-in-preeclampsia
#13
REVIEW
Vaishali V Kasture, Deepali P Sundrani, Sadhana R Joshi
Adequate maternal nutrition is critical for a healthy pregnancy outcome and poor maternal nutrition is known to be associated with pregnancy complications like preeclampsia. We have earlier demonstrated that there is an imbalance in the levels of micronutrients (folate and vitamin B12 ) along with low levels of long chain polyunsaturated fatty acids (LCPUFA) and high homocysteine levels in women with preeclampsia. Homocysteine is known to be involved in the formation of free radicals leading to increased oxidative stress...
May 14, 2018: Life Sciences
https://www.readbyqxmd.com/read/29770700/quality-use-of-the-pathology-data-in-home-medicines-reviews-a-retrospective-evaluation
#14
Vera H Buss, Alison Shield, Sam Kosari, Mark Naunton
BACKGROUND: Laboratory tests can be important tools for the assessment of pharmacotherapy. Nonetheless, there are no previous studies that have explicitly focused on the role of pathology data in Home Medicines Reviews (HMR), an Australian medication review program. OBJECTIVE: Evaluate pharmacists' recommendations regarding laboratory testing in the medication review process. METHODS: This retrospective review of HMRs assessed the prevalence of the pathology data provided by general practitioners...
May 1, 2018: Annals of Pharmacotherapy
https://www.readbyqxmd.com/read/29766695/analysis-of-nutrition-and-nutritional-status-of-haemodialysis-patients
#15
Anna Bogacka, Anna Sobczak-Czynsz, Elżbieta Kucharska, Małgorzata Madaj, Katarzyna Stucka
Background: Chronic kidney disease (CKD) is a common disease of civilization where nutrition is part of the treatment. Diet therapy is difficult as it is necessary to control the intake of: energy, protein and minerals – Na, K, Ca and P in the daily food rations (DFR). Objective: The aim of the study was to assess the nutritional status and diets of haemodialysis (HD) patients. Material and method: The study involved 141 haemodialysis patients, at the average age of 65...
2018: Roczniki Państwowego Zakładu Higieny
https://www.readbyqxmd.com/read/29764838/a-common-tcn1-loss-of-function-variant-is-associated-with-lower-vitamin-b12-concentration-in-african-americans
#16
Yao Hu, Laura M Raffield, Linda M Polfus, Arden Moscati, Girish Nadkarni, Michael H Preuss, Xue Zhong, Qiang Wei, Stephen S Rich, Yun Li, James G Wilson, Adolfo Correa, Ruth J F Loos, Bingshan Li, Paul L Auer, Alex P Reiner
No abstract text is available yet for this article.
May 15, 2018: Blood
https://www.readbyqxmd.com/read/29761147/efficacy-of-long-term-oral-vitamin-b12-supplementation-after-total-gastrectomy-results-from-a-prospective-study
#17
Joana Moleiro, Susana Mão de Ferro, Sara Ferreira, Miguel Serrano, Margarida Silveira, António Dias Pereira
Background/Objectives: Vitamin B12 (VB12) deficiency is a common complication after total gastrectomy which may be associated with megaloblastic anemia and potentially irreversible neurologic symptoms. Intramuscular supplementation of VB12 has been considered the standard treatment, although it is associated with high costs and patient discomfort. Patients/Methods: We performed a prospective uncontrolled study (ACTRN12614000107628) in order to evaluate the clinical and laboratory efficacy of long-term oral VB12 supplementation in patients submitted to total gastrectomy...
April 2018: GE Portuguese Journal of Gastroenterology
https://www.readbyqxmd.com/read/29755204/cryopreservation-studies-of-an-artificial-co-culture-between-the-cobalamin-requiring-green-alga-lobomonas-rostrata-and-the-bacterium-mesorhizobium-loti
#18
Christian J A Ridley, John G Day, Alison G Smith
Algal-bacterial co-cultures, rather than cultures of algae alone, are regarded as having the potential to enhance productivity and stability in industrial algal cultivation. As with other inocula in biotechnology, to avoid loss of production strains, it is important to develop preservation methods for the long-term storage of these cultures, and one of the most commonly used approaches is cryopreservation. However, whilst there are many reports of cryopreserved xenic algal cultures, little work has been reported on the intentional preservation of both algae and beneficial bacteria in xenic cultures...
2018: Journal of Applied Phycology
https://www.readbyqxmd.com/read/29754386/nutritional-deficiencies-in-chinese-patients-undergoing-gastric-bypass-and-sleeve-gastrectomy-prevalence-and-predictors
#19
Bingsheng Guan, Jingge Yang, Yanya Chen, Wah Yang, Cunchuan Wang
BACKGROUND: Nutritional deficiencies have been reported in bariatric surgery patients with inconsistent results. However, scarce data exist for Chinese patients. We aimed to assess nutritional deficiencies in Chinese patients undergoing Roux-en-Y gastric bypass (RYGB) and sleeve gastrectomy (SG), and to identify predictors of postoperative nutritional status. METHODS: A retrospective review of a prospectively collected database was conducted in the patients undergoing RYGB and SG in our hospital between June 2013 and January 2017...
May 12, 2018: Obesity Surgery
https://www.readbyqxmd.com/read/29754264/one-year-impact-of-bariatric-surgery-on-serum-anti-mullerian-hormone-levels-in-severely-obese-women
#20
Clara Vincentelli, Marie Maraninchi, René Valéro, Sophie Béliard, Flavia Maurice, Olivier Emungania, Bruno Berthet, Elise Lombard, Anne Dutour, Bénédicte Gaborit, Blandine Courbiere
INTRODUCTION: Although bariatric surgery seems to increase spontaneous fertility by improving ovulatory function in young women, its impact on ovarian reserve remains largely unknown. OBJECTIVE: To evaluate changes in serum anti-Mullerian hormone (AMH) levels in reproductive-age severely obese women after bariatric surgery (BS). METHODS: AMH levels were measured retrospectively in 39 women (mean age 34.6 ± 1.1 years, range 18-45) that underwent a sleeve gastrectomy or Roux-en-Y gastric bypass (RYGB) at baseline, and 6 and 12 months after BS...
May 12, 2018: Journal of Assisted Reproduction and Genetics
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