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Methylation & vitamin D

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https://www.readbyqxmd.com/read/29652161/synthesis-of-side-chain-locked-analogs-of-1%C3%AE-25-dihydroxyvitamin-d-3-bearing-a-c17-methyl-group
#1
Rita Sigüeiro, Miguel A Maestro, Antonio Mouriño
A convergent synthesis of side-chain locked vitamin D analogs 3 and 4, which bind strongly in silico to the vitamin D receptor (VDR), is described. The synthetic approach features an SN 2'- syn displacement of carbamates by cuprates to set the challenging quaternary stereogenic center at C17 and a Pd-catalyzed construction of the triene system in the presence of a diyne moiety.
April 13, 2018: Organic Letters
https://www.readbyqxmd.com/read/29577619/cellular-and-molecular-mechanisms-of-vitamin-d-in-food-allergy
#2
REVIEW
Ashlyn Poole, Yong Song, Helen Brown, Prue H Hart, Guicheng Brad Zhang
Food allergies are becoming increasingly prevalent, especially in young children. Epidemiological evidence from the past decade suggests a role of vitamin D in food allergy pathogenesis. Links have been made between variations in sunlight exposure, latitude, birth season and vitamin D status with food allergy risk. Despite the heightened interest in vitamin D in food allergies, it remains unclear by which exact mechanism(s) it acts. An understanding of the roles vitamin D plays within the immune system at the cellular and genetic levels, as well as the interplay between the microbiome and vitamin D, will provide insight into the importance of the vitamin in food allergies...
March 25, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29560490/effects-of-2-substitution-on-14-epi-19-nortachysterol-mediated-biological-events-based-on-synthesis-and-x-ray-co-crystallographic-analysis-with-the-human-vitamin-d-receptor
#3
Daisuke Sawada, Shinji Kakuda, Akiko Takeuchi, Fumihiro Kawagoe, Midori Takimoto-Kamimura, Atsushi Kittaka
Both 2α- and 2β-hydroxypropyl substituted 14-epi-1α,25-dihydroxy-19-nortachysterols were synthesized to study the human vitamin D receptor (hVDR) binding affinity, binding configurations, and interactions with amino acid residues in the ligand binding domain of hVDR by X-ray co-crystallographic analysis. In conjunction with our previous results on 14-epi-19-nortachysterol, 2-methylidene-, 2α-methyl-, 2β-methyl, and 2α-hydroxypropoxy-14-epi-19-nortachysterol, we propose a variety of effects of substitution at the C2 position in the 14-epi-19-nortachysterol skeleton on biological activities...
March 21, 2018: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29492317/multigenerational-analysis-of-sex-specific-phenotypic-differences-at-midgestation-caused-by-abnormal-folate-metabolism
#4
Nisha Padmanabhan, Joanna Rakoczy, Monika Kondratowicz, Katerina Menelaou, Georgina E T Blake, Erica D Watson
The exposure to adverse environmental conditions (e.g. poor nutrition) may lead to increased disease risk in an individual and their descendants. In some cases, the results may be sexually dimorphic. A range of phenotypes has been associated with deficiency in or defective metabolism of the vitamin folate. However, the molecular mechanism linking folate metabolism to development is still not well defined nor is it clear whether phenotypes are sex-specific. The enzyme methionine synthase reductase (MTRR) is required for the progression of folate metabolism and the utilization of methyl groups from the folate cycle...
October 2017: Environmental Epigenetics
https://www.readbyqxmd.com/read/29490089/use-of-mathematical-optimization-models-to-derive-healthy-and-safe-fish-intake
#5
Maria Persson, Sisse Fagt, Sara M Pires, Morten Poulsen, Florent Vieux, Maarten J Nauta
Background: Recommended fish intake differs substantially from observed fish intake. In Denmark, ∼15% of the population consumes the state-recommended fish intake. How much fish individuals eat varies greatly, and this variation cannot be captured by considering the fish intake of the average population. Objective: We developed a method intended to provide realistic and achievable personalized dietary recommendations based on an individual's body weight and current fish intake...
February 1, 2018: Journal of Nutrition
https://www.readbyqxmd.com/read/29477222/recent-developments-in-folate-nutrition
#6
Nassim Naderi, James D House
The term folate (vitamin B9) refers to a group of water-soluble compounds that are nutritionally essential for the support of optimal human health and development. Folates participate in numerous one-carbon transfer reactions, including the methylation of important biomolecules (lipids, amino acids, DNA). A deficiency of folate leads to pathological outcomes including anemia and impairments in reproductive health and fetal development. Due to the linkage of impaired folate status with an increased prevalence of neural tube defects (NTDs) in babies, several jurisdictions required the fortification of the food supply with folic acid, a synthetic and stable form of folate...
2018: Advances in Food and Nutrition Research
https://www.readbyqxmd.com/read/29432833/structure-of-an-entangled-heteropolysaccharide-from-pholidota-chinensis-lindl-and-its-antioxidant-and-anti-cancer-properties
#7
Dianhui Luo, Zhaojing Wang, Zhiming Li, Xiao-Qiang Yu
A major polysaccharide PCP-I was isolated and purified from Pholidota chinensis Lindl. The physicochemical and structural properties of PCP-I were studied using high-performance size-exclusion chromatography (HPSEC), gas chromatography (GC), Fourier transform infrared spectroscopy (FTIR), periodate oxidation-smith degradation, methylation-GC-MS analysis, nuclear magnetic resonance (NMR) spectroscopy and transmission electron microscopy (TEM) analysis. PCP-I was homogeneous with molecular weight (Mw) of 249 kDa and composed of xylose and fucose at a molar ratio of 2...
February 9, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29432829/vitamin-d-receptor-gene-methylation-in-hepatocellular-carcinoma
#8
Mai Abdalla, Eman Khairy, Manal L Louka, Randa Ali-Labib, Eman Abdel-Salam Ibrahim
Worldwide, hepatocellular carcinoma (HCC) is the major subtype of primary liver cancers. HCC is typically diagnosed late in its course. With respect to cancer, the genomic actions of vitamin D are mediated through binding to the Vitamin D Receptor (VDR), which allows it to modulate the expression of genes in a cell-and tissue-specific manner. Epigenetics is a rapidly evolving field of genetic study applicable to HCC. Changes in DNA methylation patterns are thought to be early events in hepatocarcinogenesis...
February 9, 2018: Gene
https://www.readbyqxmd.com/read/29395637/effect-of-adding-b-vitamins-to-vitamin-d-and-calcium-supplementation-on-cpg-methylation-of-epigenetic-aging-markers
#9
R Obeid, U Hübner, M Bodis, S Graeber, J Geisel
BACKGROUND AND AIM: B-vitamins may influence DNA methylation. We studied the effects of vitamin D + Ca + B versus D + Ca on epigenetic age markers and biological age. METHODS AND RESULTS: Participants (mean ± SD of age = 68.4 ± 10.1 years) were randomized to receive 1200 IE vitamin D3 plus 800 mg Ca-carbonate alone (n = 31) or with 0.5 mg B9, 50 mg B6, and 0.5 mg B12 (n = 32). The CpG methylation of 3 genes (ASPA, ITGA2B, and PDE4C) and the changes in methylation were compared between the groups after 1 year...
December 29, 2017: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/29383703/epigenetic-changes-and-their-implications-in-autoimmune-hepatitis
#10
REVIEW
Albert J Czaja
BACKGROUND: The genetic risk of autoimmune hepatitis is insufficient to explain the observed risk, and epigenetic changes may explain disparities in disease occurrence in different populations within and between countries. The goal of this review is to examine how epigenetic changes induced by the environment or inherited as a phenotypic trait may affect autoimmune hepatitis and be amenable to therapeutic intervention. MATERIALS AND METHODS: Pertinent abstracts were identified in PubMed by multiple search terms...
January 31, 2018: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29357419/modulation-of-apol1-mir193a-axis-prevents-podocyte-dediffrentiation-in-high-glucose-milieu
#11
Abheepsa Mishra, Kamesh Ayasolla, Vinod Kumar, Xiqian Lan, Himanshu Vashistha, Rukhsana Aslam, Ali Hussain, Sheetal Chowdhary, Shadafarin Marashi Shoshtari, Nitpriya Paliwal, Waldemar Popik, Moin A Saleem, Ashwani Malhotra, Leonard G Meggs, Karl Skorecki, Pravin C Singhal
The loss of podocyte (PD) molecular phenotype is an important feature of diabetic podocytopathy. We hypothesized that high glucose (HG) induces dedifferentiation in differentiated podocytes (DPD) through alterations in APOL1-microRNA (miR) 193a axis. HG-induced DPDs dedifferentiation manifested in the form of down regulation of WT1 and upregulation of PAX2 expression. WT1- silenced DPDs displayed enhanced expression of PAX2. Immunoprecipitation (IP) of DPD cellular lysates with anti-WT1 antibody revealed formation of WT1 repressor complexes containing Polycomb group proteins (PcG), EZH2, Menin, and DNA methyl transferase (DNMT1), whereas, silencing of either WT1 or DNMT1 disrupted this complex with enhanced expression of PAX2...
January 10, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29345167/dietary-supplements-for-health-adaptation-and-recovery-in-athletes
#12
Eric S Rawson, Mary P Miles, D Enette Larson-Meyer
Some dietary supplements are recommended to athletes based on data that supports improved exercise performance. Other dietary supplements are not ergogenic per se, but may improve health, adaptation to exercise, or recovery from injury, and so could help athletes to train and/or compete more effectively. In this review, we describe several dietary supplements that may improve health, exercise adaptation, or recovery. Creatine monohydrate may improve recovery from and adaptation to intense training, recovery from periods of injury with extreme inactivity, cognitive processing, and reduce severity of or enhance recovery from mild traumatic brain injury (mTBI)...
February 19, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29321608/the-effect-of-maternal-vitamin-d-deficiency-during-pregnancy-on-body-fat-and-adipogenesis-in-rat-offspring
#13
Juan Wen, Qin Hong, Xingyun Wang, Lijun Zhu, Tianqi Wu, Pengfei Xu, Ziyi Fu, Lianghui You, Xing Wang, Chenbo Ji, Xirong Guo
To evaluate the effects of maternal vitamin D deficiency on body fat and adipogenesis in offspring rats, and explore the potential mechanism, we constructed a vitamin D deficient rat model and performed metabolic activity evaluation, body fat monitoring, biochemical analysis, adipogenesis assay, methylation microarray and RNA-seq for their offspring rats. We found the weight of vitamin D deficient (VDD) offspring was gradually higher than that of control (CLT) offspring, and the difference was significant since 10 weeks old...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29219791/effects-of-the-vitamin-d-analog-2amd-in-cyclosporine-induced-nephrotoxicity-dose-response-and-antifibrotic-activity
#14
Bianca Tomasini-Johansson, Cori O'Brien, Alexandra Larson-Osborne, Inger Toraason, Debra Hullett, Lori Plum, Hector DeLuca, Hans Sollinger
OBJECTIVES: In this study, we aimed to ascertain the efficacy and determine the dose effects of a new analog of vitamin D, 2α-methyl-19-nor-(20S)-1α,25-dihydroxyvitamin D3 (2AMD), in decreasing fibrosis and improving renal function in a rat model of kidney disease. MATERIALS AND METHODS: Using the cyclosporine model of chronic kidney disease, we tested 4 dose regimens (2.5, 5, 10, and 20 ng/kg) of 2AMD by subcutaneous administration. The 2AMD analog was compared with another analog, 2-methylene-19-nor-(20S)-1α,25-dihydroxyvitamin D3 (2MD), given at 5 ng/kg...
December 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/29204365/the-age-rage-axis-in-an-arab-population-the-united-arab-emirates-healthy-futures-uaehfs-pilot-study
#15
Claire K Inman, Abdullah Aljunaibi, Hyunwook Koh, Abdishakur Abdulle, Raghib Ali, Abdullah Alnaeemi, Eiman Al Zaabi, Naima Oumeziane, Marina Al Bastaki, Mohammed Al-Houqani, Fatma Al-Maskari, Ayesha Al Dhaheri, Syed M Shah, Laila Abdel Wareth, Wael Al Mahmeed, Habiba Alsafar, Fatme Al Anouti, Ayesha Al Hosani, Muna Haji, Divya Galani, Matthew J O'Connor, Jiyoung Ahn, Tomas Kirchhoff, Scott Sherman, Richard B Hayes, Huilin Li, Ravichandran Ramasamy, Ann Marie Schmidt
Aims: The transformation of the United Arab Emirates (UAE) from a semi-nomadic to a high income society has been accompanied by increasing rates of obesity and Type 2 diabetes mellitus. We examined if the AGE-RAGE (receptor for advanced glycation endproducts) axis is associated with obesity and diabetes mellitus in the pilot phase of the UAE Healthy Futures Study (UAEHFS). Methods: 517 Emirati subjects were enrolled and plasma/serum levels of AGE, carboxy methyl lysine (CML)-AGE, soluble (s)RAGE and endogenous secretory (es)RAGE were measured along with weight, height, waist and hip circumference (WC/HC), blood pressure, HbA1c, Vitamin D levels and routine chemistries...
December 2017: Journal of Clinical & Translational Endocrinology
https://www.readbyqxmd.com/read/29164598/vitamin-c-modulates-glutamate-transport-and-nmda-receptor-function-in-the-retina
#16
Ivan Domith, Renato Socodato, Camila C Portugal, Andressa F Munis, Aline T Duarte-Silva, Roberto Paes-de-Carvalho
Vitamin C (in the reduced form ascorbate or in the oxidized form dehydroascorbate) is implicated in signaling events throughout the central nervous system (CNS). In the retina, a high-affinity transport system for ascorbate has been described and glutamatergic signaling has been reported to control ascorbate release. Here, we investigated the modulatory role played by vitamin C upon glutamate uptake and N-methyl-d-aspartate (NMDA) receptor activation in cultured retinal cells or in intact retinal tissue using biochemical and imaging techniques...
November 21, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29135286/vitamin-b-12-supplementation-influences-methylation-of-genes-associated-with-type-2-diabetes-and-its-intermediate-traits
#17
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...
January 2018: 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
#18
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)...
July 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/29125223/perinatal-nutrition-interacts-with-genetic-background-to-alter-behavior-in-a-parent-of-origin-dependent-manner-in-adult-collaborative-cross-mice
#19
S A Schoenrock, D Oreper, J Farrington, R C McMullan, R Ervin, D R Miller, F Pardo-Manuel de Villena, W Valdar, L M Tarantino
Previous studies in animal models and humans have shown that exposure to nutritional deficiencies in the perinatal period increases the risk of psychiatric disease. Less well understood is how such effects are modulated by the combination of genetic background and parent-of-origin (PO). To explore this, we exposed female mice from 20 Collaborative Cross (CC) strains to protein deficient, vitamin D deficient, methyl donor enriched or standard diet during the perinatal period. These CC females were then crossed to a male from a different CC strain to produce reciprocal F1 hybrid females comprising 10 distinct genetic backgrounds...
November 10, 2017: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/29121768/comparative-analysis-of-tocopherol-biosynthesis-genes-and-its-transcriptional-regulation-in-soybean-seeds
#20
COMPARATIVE STUDY
Vinutha T, Navita Bansal, Khushboo Kumari, Rama Prashat G, Rohini Sreevathsa, Veda Krishnan, Sweta Kumari, Anil Dahuja, S K Lal, Archana Sachdev, Shelly Praveen
Tocopherols composed of four isoforms (α, β, γ, and δ) and its biosynthesis comprises of three pathways: methylerythritol 4-phosphate (MEP), shikimate (SK) and tocopherol-core pathways regulated by 25 enzymes. To understand pathway regulatory mechanism at transcriptional level, gene expression profile of tocopherol-biosynthesis genes in two soybean genotypes was carried out, the results showed significantly differential expression of 5 genes: 1-deoxy-d-xylulose-5-P-reductoisomerase (DXR), geranyl geranyl reductase (GGDR) from MEP, arogenate dehydrogenase (TyrA), tyrosine aminotransferase (TAT) from SK and γ-tocopherol methyl transferase 3 (γ-TMT3) from tocopherol-core pathways...
December 20, 2017: Journal of Agricultural and Food Chemistry
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