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Vitamin B 12

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https://www.readbyqxmd.com/read/29045954/-pulmonary-arterial-hypertension-as-leading-manifestation-of-methylmalonic-aciduria-clinical-characteristics-and-gene-testing-in-15-cases
#1
X Q Liu, H Yan, J X Qiu, C Y Zhang, J G Qi, X Zhang, H J Xiao, Y L Yang, Y H Chen, J B DU
OBJECTIVE: To deepen our understanding of Methylmalonic aciduria (MMA) associated pulmonary hypertension (PH) by analyzing the characteristics of clinical presentation, pulmonary high resolusion CT(HRCT), treatment response and gene mutation. METHODS: This study includes 15 cases of pediatric patients with MMA associated PH diagnosed and treated in Peking University First Hospital pediatric department between May 2012 and May 2016 with symptoms of PH as their leading presentation...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29040674/evaluation-of-apoptotic-and-autophagic-related-protein-expressions-before-and-after-in-vitro-maturation-of-fresh-slow-frozen-and-vitrified-pre-pubertal-mouse-testicular-tissue
#2
L Dumont, F Chalmel, A Oblette, B Berby, A Rives, V Duchesne, C Rondanino, N Rives
STUDY QUESTION: Do freezing and in vitro culture procedures enhance the expression of proteins involved in apoptotic or autophagic pathways in murine pre-pubertal testicular tissue? SUMMARY ANSWER: In vitro maturation strongly modified apoptosis- and autophagy-related relative protein levels in mice testicular tissue whereas the impact of cryopreservation procedures was minimal at the end of the culture. WHAT IS KNOWN ALREADY: In vitro spermatogenesis remains a challenging technical issue as it imposes to find a very close balance between survival and death of germ cell natural precursors (i...
October 11, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/29037868/the-fungal-neurotoxin-penitrem-a-induces-the-production-of-reactive-oxygen-species-in-human-neutrophils-at-submicromolar-concentrations
#3
H F Berntsen, I L Bogen, M B Wigestrand, F Fonnum, S I Walaas, A Moldes-Anaya
Penitrem A is a fungal neurotoxin that recurrently causes intoxication in animals, and occasionally also in humans. We have previously reported that penitrem A induced the production of reactive oxygen species (ROS) in rat cerebellar granule cells, opening for a new mechanism of action for the neurotoxin. The aim of this study was to examine the potential of penitrem A to induce ROS production in isolated human neutrophil granulocytes, and to study possible mechanisms involved. Penitrem A significantly increased the production of ROS in human neutrophils at concentrations as low as 0...
October 13, 2017: Toxicology
https://www.readbyqxmd.com/read/29032627/complementary-feeding-practices-for-infants-and-young-children-in-south-asia-a-review-of-evidence-for-action-post-2015
#4
Víctor M Aguayo
Some 37% (~64 million) South Asian children under 5 years are stunted. Most stunting occurs during the complementary feeding period (6-23 months). Our objective was to (a) characterize complementary feeding practices in South Asia and (b) review the effectiveness of information, education, and counselling (IEC) interventions aiming to improve complementary feeding in South Asia. We conducted a comprehensive review of (a) the latest nationally representative survey data and (b) peer-reviewed interventions (January 1990 to December 2015) that used IEC as the main strategy to improve complementary feeding...
October 2017: Maternal & Child Nutrition
https://www.readbyqxmd.com/read/29031688/vitamin-d-deficiency-is-associated-with-poor-breast-cancer-prognostic-features-in-postmenopausal-women
#5
Benedito de Sousa Almeida-Filho, Heloisa De Luca Vespoli, Eduardo Carvalho Pessoa, Murilo Machado, Jorge Nahas-Neto, Eliana Aguiar Petri Nahas
This study aimed to evaluate the association between pretreatment vitamin D (VD) deficiency with breast cancer prognostic features in Brazilian postmenopausal women. An analytical cross sectional study was conducted with 192 women, aged 45-75 years, attended at University Hospital. Women with recent diagnosis of breast cancer, in amenorrhea >12months and age ≥45 years, without medication use or clinical conditions that interfere with VD values were included. Clinical and anthropometric data were collected...
October 11, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29029193/sex-and-iron-modify-fibroblast-growth-factor-23-fgf23-concentration-in-1-year-old-children
#6
Elisa Holmlund-Suila, Maria Enlund-Cerullo, Saara Valkama, Helena Hauta-Alus, Jenni Rosendahl, Otto Helve, Timo Hytinantti, Heli Viljakainen, Sture Andersson, Outi Mäkitie
Context: Fibroblast growth factor 23 (FGF23) plays an important role in phosphate homeostasis but its regulation is inadequately characterized. Objective: To examine regulators of FGF23, especially sex and iron status, in early childhood. Design: A cross-sectional study involving 1-year-old children. Setting and participants: Healthy term infants with a birth weight appropriate for gestational age were recruited to an ongoing vitamin D trial at the Kätilöopisto Maternity Hospital, Helsinki, Finland...
October 5, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29028822/serial-omics-characterization-of-equine-urine
#7
Min Yuan, Susanne B Breitkopf, John M Asara
Horse urine is easily collected and contains molecules readily measurable using mass spectrometry that can be used as biomarkers representative of health, disease or drug tampering. This study aimed at analyzing microliter levels of horse urine to purify, identify and quantify proteins, polar metabolites and non-polar lipids. Urine from a healthy 12 year old quarter horse mare on a diet of grass hay and vitamin/mineral supplements with limited pasture access was collected for serial-omics characterization. The urine was treated with methyl tert-butyl ether (MTBE) and methanol to partition into three distinct layers for protein, non-polar lipid and polar metabolite content from a single liquid-liquid extraction and was repeated two times...
2017: PloS One
https://www.readbyqxmd.com/read/29025167/vitamin-b-12-deficiency-may-coexist-with-endocrine-causes-of-hyperpigmentation
#8
O M P Jolobe
No abstract text is available yet for this article.
July 24, 2017: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/29020329/vitamin-d3-supplementation-increases-spine-bone-mineral-density-in-adolescents-and-young-adults-with-hiv-infection-being-treated-with-tenofovir-disoproxil-fumarate-a-randomized-placebo-controlled-trial
#9
Peter L Havens, Charles B Stephensen, Marta D Van Loan, Gertrud U Schuster, Leslie R Woodhouse, Patricia M Flynn, Catherine M Gordon, Cynthia G Pan, Brandy Rutledge, D Robert Harris, Georgine Price, Alyne Baker, William A Meyer, Craig M Wilson, Rohan Hazra, Bill G Kapogiannis, Kathleen Mulligan
Background: Tenofovir disoproxil fumarate (TDF) decreases bone mineral density (BMD). We hypothesized vitamin D3 (VITD3) would increase BMD in youth receiving TDF. Methods: Randomized double-blind placebo-controlled trial of directly observed VITD3 vs. placebo every 4 weeks for 48 weeks in youth ages 16-24 years with HIV, viral load <200 copies/mL, taking TDF-containing combination antiretroviral therapy (TDF-cART) for ≥180 days. Participants (N=214) received a daily multivitamin containing VITD3 400 IU and calcium 162 mg, plus monthly randomized VITD3 50,000 IU (N=109) or placebo (N=105)...
August 21, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29018905/cyp109e1-is-a-novel-versatile-statin-and-terpene-oxidase-from-bacillus-megaterium
#10
Natalia Putkaradze, Martin Litzenburger, Ammar Abdulmughni, Mohammed Milhim, Elisa Brill, Frank Hannemann, Rita Bernhardt
CYP109E1 is a cytochrome P450 monooxygenase from Bacillus megaterium with a hydroxylation activity for testosterone and vitamin D3. This study reports the screening of a focused library of statins, terpene-derived and steroidal compounds to explore the substrate spectrum of this enzyme. Catalytic activity of CYP109E1 towards the statin drug-precursor compactin and the prodrugs lovastatin and simvastatin as well as biotechnologically relevant terpene compounds including ionones, nootkatone, isolongifolen-9-one, damascones, and β-damascenone was found in vitro...
October 11, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28978540/functional-vitamin-b-6-status-and-long-term-mortality-in-renal-transplant-recipients
#11
Isidor Minović, Anna van der Veen, Martijn van Faassen, Ineke J Riphagen, Else van den Berg, Claude van der Ley, António W Gomes-Neto, Johanna M Geleijnse, Manfred Eggersdorfer, Gerjan J Navis, Ido P Kema, Stephan Jl Bakker
Background: Low plasma concentrations of pyridoxal 5'-phosphate (PLP) are common in renal transplant recipients (RTRs) and confer increased risk of long-term mortality. To our knowledge, it is not known whether low plasma PLP concentrations have functional (i.e., intracellular) consequences and, if so, whether such consequences are associated with increased risk of mortality.Objectives: We assessed the association of plasma PLP with functional vitamin B-6 status and explored the potential association of functional vitamin B-6 status with long-term mortality in RTRs...
October 4, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28977620/case-series-of-infantile-tremor-syndrome-in-tertiary-care-paediatric-centre-from-southern-india
#12
Vykuntaraju K Gowda, Vinyasa Kolli, Asha Benakappa, Varunvenkat M Srinivasan, Sanjay K Shivappa, Naveen Benakappa
Introduction: Infantile tremor syndrome (ITS) is characterized by anaemia, skin depigmentation, tremors and developmental delay. The lack of sufficient literature on ITS and its conflicting association with vitamin B12 deficiency made us present this article. Objective: The objective of this study is to describe demographic, clinical and laboratory profile and outcome of ITS. Methods: This is a retrospective chart review of all children presenting with typical features of ITS attending a tertiary paediatric centre in southern India between January 2014 and January 2017...
July 27, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/28976135/poly-mva-attenuates-7-12-dimethylbenz-a-anthracene-initiated-and-croton-oil-promoted-skin-papilloma-formation-on-mice-skin
#13
Ravindran K Veena, Thekkuttuparambil A Ajith, Kainoor K Janardhanan, Francis Antonawich
Chemopreventive agents which exhibit activities such as anti-inflammation, inhibition of carcinogen induced mutagenesis and scavenging of free radical might play a decisive role in the inhibition of chemical carcinogenesis either at the initiation or promotion stage. Many synthesized palladium (Pd) complexes tested experimentally for antitumor activity are found effective. Poly-MVA is a liquid blend preparation containing B complex vitamins, ruthenium with Pd complexed with alpha lipoic acid as the major ingredients...
September 2017: Journal of Experimental Therapeutics & Oncology
https://www.readbyqxmd.com/read/28954197/vitamin-d-analogues-with-a-p-hydroxyphenyl-group-at-the-c25-position-crystal-structure-of-vitamin-d-receptor-ligand-binding-domain-complexed-with-the-ligand-explains-the-mechanism-underlying-full-antagonistic-action
#14
Akira Kato, Makiko Yamao, Yuta Hashihara, Hiroaki Ishida, Toshimasa Itoh, Keiko Yamamoto
Vitamin D receptor (VDR) antagonists can be classified into two categories: the first category of VDR antagonists, which do not stabilize the helix 11-12, and the second category of antagonists, which destabilize the helix 6-7 region. To elucidate the mechanism underlying the first category antagonists by using the crystal structure, we designed and synthesized several VDR ligands with a p-hydroxyphenyl group at the C25-position. Of these, 22S-butyl-25-carbonyl analogue 5b and 25-di-p-hydoroxyphenyl analogues 6a,b showed strong antagonistic activity...
September 27, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28926730/impact-of-evolocumab-treatment-on-low-density-lipoprotein-cholesterol-levels-in-heterozygous-familial-hypercholesterolemic-patients-withdrawing-from-regular-apheresis
#15
Masa-Aki Kawashiri, Atsushi Nohara, Toshinori Higashikata, Hayato Tada, Chiaki Nakanishi, Hirofumi Okada, Tetsuo Konno, Kenji Sakata, Kenshi Hayashi, Akihiro Inazu, Hiroshi Mabuchi, Masakazu Yamagishi
BACKGROUND AND AIMS: Low-density lipoprotein (LDL) apheresis has been used to treat refractory hyperlipidemia such as familial hypercholesterolemia (FH). Evolocumab, a proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitor used in clinical settings, can reduce LDL cholesterol (LDL-C) levels by >70%. Therefore, this study aimed to assess the impact of evolocumab on withdrawal from regular LDL apheresis in patients with heterozygous FH (HeFH). METHODS: Eleven patients with HeFH undergoing biweekly LDL apheresis were enrolled and were subsequently switched to a biweekly subcutaneous injection of 140 mg of evolocumab...
September 9, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28925036/combining-food-based-dietary-recommendations-using-optifood-with-zinc-fortified-water-potentially-improves-nutrient-adequacy-among-4-to-6-year-old-children-in-kisumu-west-district-kenya
#16
Prosper Kujinga, Karin J Borgonjen-van den Berg, Cecilia Superchi, Hermine J Ten Hove, Elizabeth Opiyo Onyango, Pauline Andang'o, Valeria Galetti, Michael B Zimmerman, Diego Moretti, Inge D Brouwer
Children in developing countries often face multiple micronutrient deficiencies. Introduction of zinc-fortified water can increase zinc intake, but additional recommendations are required to address overall diet nutrient adequacy. We developed and tested food-based recommendations (FBRs) that included zinc-fortified water for children aged between 4 and 6 years from rural Kenya to achieve the best possible nutrient adequacy. Dietary intakes of 60 children aged 4-6 years, from Kisumu West district, Kenya, were assessed using a quantitative multipass 24-hr recall...
September 19, 2017: Maternal & Child Nutrition
https://www.readbyqxmd.com/read/28920809/evaluation-of-bone-mineralization-by-computed-tomography-in-wild-and-captive-european-common-spadefoots-pelobates-fuscus-in-relation-to-exposure-to-ultraviolet-b-radiation-and-dietary-supplements
#17
Martine van Zijll Langhout, Richard P J H Struijk, Tessa Könning, Dick van Zuilen, Katalin Horvath, Hester van Bolhuis, Roelof Maarschalkerweerd, Frank Verstappen
Captive rearing programs have been initiated to save the European common spadefoot (Pelobates fuscus), a toad species in the family of Pelobatidae, from extinction in The Netherlands. Evaluating whether this species needs ultraviolet B (UVB) radiation and/or dietary supplementation for healthy bone development is crucial for its captive management and related conservation efforts. The bone mineralization in the femurs and the thickest part of the parietal bone of the skulls of European common spadefoots (n = 51) was measured in Hounsfield units (HUs) by computed tomography...
September 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28917239/screening-for-inadequate-dietary-vitamin-b-12-intake-in-south-asian-women-using-a-nutrient-specific-semi-quantitative-food-frequency-questionnaire
#18
Gael Janine Mearns, Elaine Carolyn Rush
BACKGROUND AND OBJECTIVES: A high prevalence of vitamin B-12 (B-12) deficiency among young women of South Asian origin predisposes to significant health risks for these women and their future offspring. Vegetarian or low-meat based dietary practices contribute to B-12 deficiency. This study validated a nutrient-specific, semi-quantitative food frequency questionnaire (B12FFQ), developed to estimate dietary B-12 intake in South Asian women. METHODS AND STUDY DESIGN: The B12FFQ was developed, then tested in 60 apparently healthy South Asian women aged 18-50 years, living in Auckland, New Zealand...
2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28917233/high-prevalence-of-vitamin-b-12-insufficiency-in-patients-with-crohn-s-disease
#19
Misora Ao, Hidemi Tsuji, Kenichiro Shide, Yuki Kosaka, Akari Noda, Nobuya Inagaki, Hiroshi Nakase, Kiyoshi Tanaka
BACKGROUND AND OBJECTIVES: In Crohn's disease (CD), belonging to inflammatory bowel disease, the small intestine is involved in most cases. Most frequently affected is the distal ileum, where vitamin B-12 is specifically absorbed. Therefore, malabsorption of vitamin B-12 is quite likely to occur in patients with CD. In this study, we have studied the vitamin B-12 status in CD patients. METHODS AND STUDY DESIGN: Forty eight patients with CD were evaluated for their food intake, and circulating concentrations of vitamin B-12, folic acid, and homocysteine (Hcy) as a sensitive marker for the insufficiency of these vitamins and a risk factor of atherosclerosis...
2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28914773/vitamin-d-nutritional-status-and-its-related-factors-for-chinese-children-and-adolescents-in-2010-2012
#20
Yichun Hu, Jing Chen, Rui Wang, Min Li, Chunfeng Yun, Weidong Li, Yanhua Yang, Jianhua Piao, Xiaoguang Yang, Lichen Yang
Vitamin D plays a critical role in calcium and phosphate metabolism and helps maintain skeletal integrity in childhood, yet vitamin D status in Chinese children and adolescents is not well documented. The aim of this study was to assess the vitamin D status and analyze the risk factors for vitamin D deficiency in Chinese children and adolescents aged 6-17 years. Serum 25 hydroxyvitamin D (25(OH)D) was measured with a radioimmunoassay kit in 15,000 children and adolescent participants in the Chinese national nutrition and health survey (CNNHS) 2010-2012...
September 15, 2017: Nutrients
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