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Vitamin B6

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https://www.readbyqxmd.com/read/29331158/dietary-sources-of-energy-and-nutrients-in-the-contemporary-diet-of-inuit-adults-results-from-the-2007-08-inuit-health-survey
#1
Tiff-Annie Kenny, Xue Feng Hu, Harriet V Kuhnlein, Sonia D Wesche, Hing Man Chan
OBJECTIVE: To characterize the major components of the contemporary Inuit diet and identify the primary sources of energy and essential nutrients. DESIGN: Dietary data were derived from the 24 h recall collected by the Inuit Health Survey (IHS) from 2007 to 2008. The population proportion method was used to determine the percentage contribution of each group. Unique food items/preparations (ninety-three country foods and 1591 market foods) were classified into eight country food groups and forty-one market food groups...
January 14, 2018: Public Health Nutrition
https://www.readbyqxmd.com/read/29317006/secular-trends-in-regional-differences-in-nutritional-biomarkers-and-self-reported-dietary-intakes-among-american-adults-national-health-and-nutrition-examination-survey-nhanes-1988-1994-to-2009-2010
#2
Ashima K Kant, Barry I Graubard
OBJECTIVE: To understand the contribution of regional differentials in dietary exposures to regional gradients in health, we examined 20-year trends in the association of US census region of residence with nutritional biomarkers and dietary intakes of American adults. DESIGN: Observational. SETTING: The biomarker and 24 h dietary recall data were from the National Health and Nutrition Examination Surveys (NHANES) conducted during 1988-1994 and 1999-2010...
January 10, 2018: Public Health Nutrition
https://www.readbyqxmd.com/read/29316987/diet-nutrition-and-the-ageing-brain-current-evidence-and-new-directions
#3
Katie Moore, Catherine F Hughes, Mary Ward, Leane Hoey, Helene McNulty
Globally populations are ageing. By 2050, it is estimated that there will be two billion people aged 60 years or over, of which 131 million are projected to be affected by dementia, while depression is predicted to be the second leading cause of disability worldwide by 2020. Preventing or delaying the onset of these disorders should therefore be a public health priority. There is some evidence linking certain dietary patterns, particularly the Mediterranean diet, with a reduced risk of dementia and depression...
January 10, 2018: Proceedings of the Nutrition Society
https://www.readbyqxmd.com/read/29315276/identifying-dietary-patterns-associated-with-mild-cognitive-impairment-in-older-korean-adults-using-reduced-rank-regression
#4
Dayeon Shin, Kyung Won Lee, Mi-Hye Kim, Hung Ju Kim, Yun Sook An, Hae-Kyung Chung
Diet plays a crucial role in cognitive function. Few studies have examined the relationship between dietary patterns and cognitive functions of older adults in the Korean population. This study aimed to identify the effect of dietary patterns on the risk of mild cognitive impairment. A total of 239 participants, including 88 men and 151 women, aged 65 years and older were selected from health centers in the district of Seoul, Gyeonggi province, and Incheon, in Korea. Dietary patterns were determined using Reduced Rank Regression (RRR) methods with responses regarding vitamin B6, vitamin C, and iron intakes, based on both a one-day 24-h recall and a food frequency questionnaire...
January 9, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29299926/hydrophilic-multi-template-molecularly-imprinted-biopolymers-based-on-a-green-synthesis-strategy-for-determination-of-b-family-vitamins
#5
Abbas Ostovan, Mehrorang Ghaedi, Maryam Arabi, Qian Yang, Jinhua Li, Lingxin Chen
A novel green synthesis strategy was proposed for preparation of multi-template molecularly imprinted biopolymers (mt-MIBP) in aqueous media with less consumption of organic solvents, which were subsequently used as sorbents of ultrasound-assisted dispersive solid-phase extraction (d-SPE) for simultaneous recognition and efficient separation of B-family vitamins in juice samples followed by high performance liquid chromatography (HPLC) determination. The obtained mt-MIBP was fully characterized by SEM, FT-IR, TEM and BET...
January 4, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29298649/an-inflammation-related-nutrient-pattern-is-associated-with-both-brain-and-cognitive-measures-in-a-multiethnic-elderly-population
#6
Yian Gu, Jennifer J Manly, Richard P Mayeux, Adam M Brickman
BACKGROUND: Accumulating evidence suggest that dietary factors are associated with Alzheimer's disease, and brain and cognitive health. It is unclear whether inflammation explains this association. OBJECTIVE: To examine whether an inflammation-related nutrient pattern (INP) was associated with neuroimaging and cognitive measures of brain health. METHOD: The current cross-sectional study included 330 non-demented elderly (mean age 79 years at MRI scan) participants in a multi-ethnic, community-based cohort study who had information on nutritional intakes (estimated from food frequency questionnaire), circulating C-reactive protein and interleukin-6 (measured by ELISA), MRI scans, and cognition...
January 1, 2018: Current Alzheimer Research
https://www.readbyqxmd.com/read/29290084/a-systematic-review-evaluating-the-effect-of-vitamin-b6-on-semen-quality
#7
Saleem Ali Banihani
PURPOSE: This review systematically discusses and summarizes the effect of vitamin B6 on semen quality. MATERIAL AND METHOD: To achieve this contribution, we searched the PubMed, Scopus, and Web of Science databases for English language papers from 1984 through 2017 using the key words "sperm" versus "Vitamin B6", "pyridoxine", and "pyridoxal". Also, the references from selected published papers were included, only if relevant. RESULT: To date, as revealed by rodent studies, high doses of vitamin B6 impair semen quality and sperm parameters...
December 30, 2017: Urology Journal
https://www.readbyqxmd.com/read/29250709/folic-acid-inhibits-homocysteine-induced-cell-apoptosis-in-human-umbilical-vein-endothelial-cells
#8
Shanshan Cui, Wen Li, Pengyan Wang, Xin Lv, Yuxia Gao, Guowei Huang
Homocysteine may be responsible for vascular endothelial cell injury, which occurs early in the pathology of cardiovascular disease. Homocysteine metabolism requires enzymatic interaction with vitamins such as folic acid, vitamin B12, and vitamin B6. We hypothesized that folic acid alleviated homocysteine-induced vascular injury by regulating the metabolic pathway of apoptosis. Human umbilical vein endothelial cells were incubated for 48 h with folic acid at the concentrations of 0-1000 nmol/L, in combination with either 1000 μmol/L homocysteine or vehicle for the first 24 h...
December 18, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29250622/targeted-photodynamic-therapy-in-visible-light-using-bodipy-appended-copper-ii-complexes-of-a-vitamin-b6-schiff-base
#9
Nandini Mukherjee, Santosh Podder, Koushambi Mitra, Shamik Majumdar, Dipankar Nandi, Akhil R Chakravarty
Copper(ii) complexes [Cu(L1/L2/L3)(A)] (1-3), where H2A·HCl is a vitamin B6 Schiff base, viz. 3-hydroxy-5-(hydroxymethyl)-4-(((2-hydroxyphenyl)imino)methyl)-2-methylpyridin-1-ium chloride, L1 and L2 are 2-(2-pyridyl)benzimidazole based borondipyrromethene (BODIPY) ligands and L3 is 2-(2-pyridyl)benzimidazole, were prepared, characterized and their visible light-induced anti-cancer activity was studied. Complex 3, characterized by X-ray crystallography, exhibits a distorted square-pyramidal geometry for copper (τ = 0...
December 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29244251/effect-of-combination-folic-acid-vitamin-b6-and-vitamin-b12-supplementation-on-fracture-risk-in-women-a-randomized-controlled-trial
#10
Katie L Stone, Li-Yung Lui, William G Christen, Aron M Troen, Douglas C Bauer, Deborah Kado, Christopher Schambach, Steven R Cummings, JoAnn E Manson
Epidemiologic studies have demonstrated an association of elevated plasma homocysteine levels with greater bone resorption and fracture risk. Vitamins B12 , B6 , and folic acid are cofactors in homocysteine metabolism, and supplementation with B vitamins is effective in lowering homocysteine levels in humans. However, randomized trials of supplemental B vitamins for reduction of fracture risk have been limited. Therefore, we performed an ancillary study to the Women's Antioxidant and Folic Acid Cardiovascular Study (WAFACS), a large randomized trial of women with preexisting cardiovascular disease or three or more coronary risk factors, to test whether a daily B vitamin intervention including folic acid (2...
December 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29242864/three-in-one-type-fluorescent-sensor-based-on-a-pyrene-pyridoxal-cascade-for-the-selective-detection-of-zn-ii-hydrogen-phosphate-and-cysteine
#11
Yachana Upadhyay, Thangaraj Anand, Lavanya Thilak Babu, Priyankar Paira, Guido Crisponi, Ashok Kumar Sk, Rajender Kumar, Suban K Sahoo
A novel fluorescent receptor L was synthesized by Schiff base condensation of 1-pyrenemethylamine with the vitamin B6 cofactor pyridoxal. The receptor L is highly selective and sensitive towards Zn2+ ions among other tested metal ions. Upon interaction with Zn2+, the receptor L showed a distinct fluorescence enhancement at 485 nm due to the excimer formation leading to the fluorescent colour change from blue to bluish-green. Subsequently, when the in situ generated ZnL2 complex interacted with various anions and amino acids, the addition of H2PO4- and cysteine reinstated the fluorescence of the receptor L due to the demetalation of Zn2+ from the ZnL2 complex...
December 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29238985/impaired-functional-vitamin-b6-status-is-associated-with-increased-risk-of-lung-cancer
#12
Despoina Theofylaktopoulou, Øivind Midttun, Per M Ueland, Klaus Meyer, Anouar Fanidi, Wei Zheng, Xiao-Ou Shu, Yong-Bing Xiang, Ross Prentice, Mary Pettinger, Cynthia A Thomson, Graham G Giles, Allison Hodge, Qiuyin Cai, William J Blot, Jie Wu, Mikael Johansson, Johan Hultdin, Kjell Grankvist, Victoria L Stevens, Marjorie M McCullough, Stephanie J Weinstein, Demetrius Albanes, Regina Ziegler, Neal D Freedman, Arnulf Langhammer, Kristian Hveem, Marit Naess, Howard D Sesso, J Michael Gaziano, Julie E Buring, I-Min Lee, Gianluca Severi, Xuehong Zhang, Meir J Stampfer, Jiali Han, Stephanie A Smith-Warner, Anne Zeleniuch-Jacquotte, Loic le Marchand, Jian-Min Yuan, Renwei Wang, Lesley M Butler, Woon-Puay Koh, Yu-Tang Gao, Nathaniel Rothman, Ulrika Ericson, Emily Sonestedt, Kala Visvanathan, Miranda R Jones, Caroline Relton, Paul Brennan, Mattias Johansson, Arve Ulvik
Circulating vitamin B6 levels have been found to be inversely associated with lung cancer. Most studies have focused on the B6 form pyridoxal 5'-phosphate (PLP), a direct biomarker influenced by inflammation and other factors. Using a functional B6 marker allows further investigation of the potential role of vitamin B6 status in the pathogenesis of lung cancer. We prospectively evaluated the association of the functional marker of vitamin B6 status, the 3-hydroxykynurenine:xanthurenic acid ratio (HK:XA), with risk of lung cancer in a nested case-control study consisting of 5,364 matched case control pairs from the Lung Cancer Cohort Consortium (LC3)...
December 14, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29238081/pyridoxine-5-phosphate-oxidase-is-a-novel-therapeutic-target-and-regulated-by-the-tgf-%C3%AE-signalling-pathway-in-epithelial-ovarian-cancer
#13
Lingyun Zhang, Daibing Zhou, Wencai Guan, Weimin Ren, Wenwen Sun, Jimin Shi, Qunbo Lin, Jinguo Zhang, Tiankui Qiao, Yulong Ye, Yun Wu, Yaning Zhang, Xulei Zuo, Kristin L Connor, Guoxiong Xu
Pyridoxine 5'-phosphate oxidase (PNPO) is an enzyme that converts pyridoxine 5'-phosphate into pyridoxal 5'-phosphate (PLP), an active form of vitamin B6 implicated in several types of cancer. However, the role of PNPO and its regulatory mechanism in epithelial ovarian cancer (EOC) are unknown. In the present study, PNPO expression in human ovarian tumour tissue and its association with the clinicopathological features of patients with EOC were examined. Further, the biological function of PNPO in EOC cells and in xenograft was evaluated...
December 13, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/29233148/dna-repair-protein-ape1-is-involved-in-host-response-during-pneumococcal-meningitis-and-its-expression-can-be-modulated-by-vitamin-b6
#14
Leonam G Coutinho, Ana Helena Sales de Oliveira, Matthias Witwer, Stephen L Leib, Lucymara F Agnez-Lima
BACKGROUND: The production of reactive oxygen species (ROS) during pneumococcal meningitis (PM) leads to severe DNA damage in the neurons and is the major cause of cell death during infection. Hence, the use of antioxidants as adjuvant therapy has been investigated. Previous studies have demonstrated the possible participation of apurinic/apyrimidinic endonuclease (APE1) during PM. The aims of this study were to investigate the APE1 expression in the cortical and hippocampal tissues of infant Wistar rats infected with Streptococcus pneumoniae and its association with cell death and understand the role of vitamin B6 (vitB6) as a protective factor against cell death...
December 12, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29214163/protective-effects-of-pyridoxamine-supplementation-in-the-early-stages-of-diet-induced-kidney-dysfunction
#15
F Chiazza, A S Cento, D Collotta, D Nigro, G Rosa, F Baratta, V Bitonto, J C Cutrin, M Aragno, R Mastrocola, M Collino
Pyridoxamine, a structural analog of vitamin B6 that exerts antiglycative effects, has been proposed as supplementary approach in patients with initial diabetic nephropathy. However, the molecular mechanism(s) underlying its protective role has been so far slightly examined. C57Bl/6J mice were fed with a standard diet (SD) or a diet enriched in fat and fructose (HD) for 12 weeks. After 3 weeks, two subgroups of SD and HD mice started pyridoxamine supplementation (150 mg/kg/day) in the drinking water. HD fed mice showed increased body weight and impaired glucose tolerance, whereas pyridoxamine administration significantly improved insulin sensitivity, but not body weight, and reduced diet-induced increase in serum creatinine and urine albumin...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29197046/evaluation-of-nutritional-status-post-laparoscopic-sleeve-gastrectomy-5-year-outcomes
#16
Salman Al-Sabah, Aliaa Al-Mutawa, Alfred Kojo Anderson, Mohammad Al-Mutawa
INTRODUCTION: Obesity is considered a public health problem and has led to advancements in bariatric surgery. Laparoscopic sleeve gastrectomy (LSG) had become the most performed procedure worldwide; however, its consequences on nutritional status in the short and long term are of concern. METHODS: A retrospective analysis of medical records and bariatric database of patients who underwent LSG from October 2008-September 2015 at Al-Amiri Hospital, Kuwait, was performed...
December 1, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/29187681/identification-of-ybha-as-the-pyridoxal-5-phosphate-plp-phosphatase-in-escherichia-coli-importance-of-plp-homeostasis-on-the-bacterial-growth
#17
Ryota Sugimoto, Natsumi Saito, Tomohiro Shimada, Kan Tanaka
The gene ybhA of Escherichia coli encodes a phosphatase that has an in vitro specificity to dephosphorylate pyridoxal 5'-phosphate (PLP or vitamin B6), a co-factor for aminotransferases and other enzymes. In this study, we found that excess pyridoxal (PL) in a minimal medium resulted in excess PLP in vivo and growth inhibition, which was alleviated by YbhA overproduction. Conversely, the YbhA overproduction resulted in PLP shortage in vivo and the correlated reduction in growth rate, which was significantly negated by PL in the medium...
November 29, 2017: Journal of General and Applied Microbiology
https://www.readbyqxmd.com/read/29182708/b-vitamin-therapy-for-kidney-transplant-recipients-lowers-homocysteine-and-improves-selective-cognitive-outcomes-in-the-randomized-favorit-ancillary-cognitive-trial
#18
T M Scott, G Rogers, D E Weiner, K Livingston, J Selhub, P F Jacques, I H Rosenberg, A M Troen
BACKGROUND: Objectives: Elevated plasma total homocysteine (tHcy) is associated with increased risk of cardiovascular disease, stroke and dementia. Results of clinical trials using B-vitamins to reduce the cognitive risks attributed to tHcy have been inconsistent. The high prevalence of both hyperhomocysteinemia and cognitive impairment among kidney transplant recipients makes them an important population in which to evaluate the effect of lowering homocysteine on cognitive function. We therefore evaluated whether B-vitamin therapy to lower tHcy would prevent cognitive-decline in a cohort of stable kidney transplant recipients...
2017: Journal of Prevention of Alzheimer's Disease
https://www.readbyqxmd.com/read/29176866/quercetin-metabolism-by-fecal-microbiota-from-healthy-elderly-human-subjects
#19
Motoi Tamura, Chigusa Hoshi, Masuko Kobori, Shunsuke Takahashi, Junko Tomita, Mie Nishimura, Jun Nishihira
Quercetin is a polyphenol found in food that has numerous health benefits. This study investigated the relationship between quercetin metabolism, gut microbiota composition, and dietary intake in elderly Japanese subjects. A food frequency questionnaire was used to assess dietary intake during the week prior to stool sample collection. Fecal suspensions from 56 subjects were anaerobically incubated with quercetin and fecal microbiota composition was analyzed by next-generation sequencing. Inter-individual variations in quercetin concentration and fecal microbiota composition at family level suggested differences in microbial quercetin metabolism...
2017: PloS One
https://www.readbyqxmd.com/read/29168736/association-between-vitamin-intake-during-pregnancy-and-risk-of-small-for-gestational-age
#20
Inmaculada Salcedo-Bellido, Juan Miguel Martínez-Galiano, Rocío Olmedo-Requena, Juan Mozas-Moreno, Aurora Bueno-Cavanillas, Jose J Jimenez-Moleon, Miguel Delgado-Rodríguez
Pregnancy increases the requirements of certain nutrients, such as vitamins, to provide nutrition for the newborn. The aim was to analyze the association between dietary intake of vitamins during pregnancy and risk of having a small for gestational age (SGA) newborn. A matched case-control study was conducted (518 cases and 518 controls of pregnant women) in Spain. Dietary vitamin intake during pregnancy was assessed using a validated food frequency questionnaire, categorized into quintiles. Odds ratios (ORs) and their 95% confidence intervals (CI) were estimated with conditional regression logistic models...
November 23, 2017: Nutrients
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