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Methylation & vitamin D

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https://www.readbyqxmd.com/read/27915349/roles-of-1-25-oh-2d3-and-vitamin-d-receptor-in-the-pathogenesis-of-rheumatoid-arthritis-and-systemic-lupus-erythematosus-by-regulating-the-activation-of-cd4-t-cells-and-the-pkc%C3%AE-erk-signaling-pathway
#1
Xiao-Jie He, Yan Ding, Wei Xiang, Xi-Qiang Dang
BACKGROUND/AIMS: The study aims to elucidate the roles of 1,25(OH)2D3 and vitamin D receptor (VDR) in the pathogenesis of rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE) by regulating the activation of CD4+ T cells and the PKCδ/ERK signaling pathway. METHODS: From January 2013 to December 2015, a total of 130 SLE patients, 137 RA patients and 130 healthy controls were selected in this study. Serum levels of 1,25(OH)2D3 and VDR mRNA expression were detected by ELISA and real-time fluorescence quantitative PCR (RT-qPCR)...
December 5, 2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27881965/fundamental-role-of-methylenetetrahydrofolate-reductase-677-c%C3%A2-%C3%A2-%C3%A2-t-genotype-and-flavin-compounds-in-biochemical-phenotypes-for-schizophrenia-and-schizoaffective-psychosis
#2
Stephanie Fryar-Williams
The Mental Health Biomarker Project (2010-2016) explored variables for psychosis in schizophrenia and schizoaffective disorder. Blood samples from 67, highly characterized symptomatic cases and 67 gender and age matched control participants were analyzed for methyl tetrahydrofolate reductase (MTHFR) 677C → T gene variants and for vitamin B6, B12 and D, folate, unbound copper, zinc cofactors for enzymes in the methylation cycle, and related catecholamine pathways. Urine samples were analyzed for indole-catecholamines, their metabolites, and oxidative-stress marker, hydroxylpyrolline-2-one (HPL)...
2016: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/27855629/vitamin-d-and-the-epigenetic-machinery-in-colon-cancer
#3
Meiyan Sun, Bin Guo
Vitamin D is an important hormone that regulates many physiological processes related to human health. Through its nuclear receptor, VDR, vitamin D controls gene expression through genetic and epigenetic mechanisms. Increasing data have demonstrated the anti-cancer activities of vitamin D in various cancers, including colon cancer. This review summarizes the recent progresses in our understanding of the molecular mechanisms of vitamin D and its interaction with the epigenetic machinery in colon cancer. Vitamin D changes the status of DNA methylation and histone modifications, resulting in the activation of tumor suppressors and inhibition of oncogenes...
November 17, 2016: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/27836631/low-serum-vitamin-d-levels-and-anti-n-methyl-d-aspartate-receptor-encephalitis-a-case-control-study
#4
Yaqing Shu, Qingmei Su, Siyuan Liao, Tingting Lu, Rui Li, Xiaobo Sun, Wei Qiu, Yu Yang, Xueqiang Hu, Zhengqi Lu
BACKGROUND: Low vitamin D levels are associated with autoimmunity, but the relationship with anti-N-Methyl-d-aspartate receptor (anti-NMDAR) encephalitis is unknown. METHODS: 25(OH) D levels and clinical and cerebrospinal fluid parameters were evaluated in 30 patients with anti-NMDAR encephalitis and compared with 90 age-, sex-, and season-matched healthy controls. RESULTS: 25(OH)D levels were lower in patients with anti-NMDAR encephalitis compared to controls (43...
November 8, 2016: Neurochemistry International
https://www.readbyqxmd.com/read/27814705/maternal-urinary-metabolic-signatures-of-fetal-growth-and-associated-clinical-and-environmental-factors-in-the-inma-study
#5
Léa Maitre, Cristina M Villanueva, Matthew R Lewis, Jesús Ibarluzea, Loreto Santa-Marina, Martine Vrijheid, Jordi Sunyer, Muireann Coen, Mireille B Toledano
BACKGROUND: Maternal metabolism during pregnancy is a major determinant of the intra-uterine environment and fetal outcomes. Herein, we characterize the maternal urinary metabolome throughout pregnancy to identify maternal metabolic signatures of fetal growth in two subcohorts and explain potential sources of variation in metabolic profiles based on lifestyle and clinical data. METHODS: We used (1)H nuclear magnetic resonance (NMR) spectroscopy to characterize maternal urine samples collected in the INMA birth cohort at the first (n = 412 and n = 394, respectively, in Gipuzkoa and Sabadell cohorts) and third trimesters of gestation (n = 417 and 469)...
November 4, 2016: BMC Medicine
https://www.readbyqxmd.com/read/27777636/maternal-vitamin-d-depletion-alters-dna-methylation-at-imprinted-loci-in-multiple-generations
#6
Jing Xue, Sarah A Schoenrock, William Valdar, Lisa M Tarantino, Folami Y Ideraabdullah
BACKGROUND: Environmental perturbation of epigenetic mechanisms is linked to a growing number of diseases. Characterizing the role environmental factors play in modifying the epigenome is important for disease etiology. Vitamin D is an essential nutrient affecting brain, bone, heart, immune and reproductive health. Vitamin D insufficiency is a global issue, and the role in maternal and child health remains under investigation. METHODS: We used Collaborative Cross (CC) inbred mice to characterize the effect of maternal vitamin D depletion on offspring phenotypic and epigenetic outcomes at imprinted domains (H19/Igf2, Snrpn, Dlk1/Gtl2, and Grb10) in the soma (liver) and germline (sperm)...
2016: Clinical Epigenetics
https://www.readbyqxmd.com/read/27770020/early-micronutrient-supplementation-protects-against-early-stress-induced-cognitive-impairments
#7
Eva F G Naninck, J Efraim Oosterink, Kit-Yi Yam, Lennart P de Vries, Henk Schierbeek, Johannes B van Goudoever, Rikst-Nynke Verkaik-Schakel, Josèe A Plantinga, Torsten Plosch, Paul J Lucassen, Aniko Korosi
Early-life stress (ES) impairs cognition later in life. Because ES prevention is problematic, intervention is needed, yet the mechanisms that underlie ES remain largely unknown. So far, the role of early nutrition in brain programming has been largely ignored. Here, we demonstrate that essential 1-carbon metabolism-associated micronutrients (1-CMAMs; i.e., methionine and B vitamins) early in life are crucial in programming later cognition by ES. ES was induced in male C57Bl/6 mice from postnatal d (P)2-9. 1-CMAM levels were measured centrally and peripherally by using liquid chromatography-mass spectroscopy...
October 21, 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/27769995/parental-vitamin-d-deficiency-during-pregnancy-is-associated-with-increased-blood-pressure-in-offspring-via-panx1-hypermethylation
#8
Laura M G Meems, Hasan Mahmud, Hendrik Buikema, Jörg Tost, Sven Michel, Janny Takens, Rikst N Verkaik-Schakel, Inge Vreeswijk-Baudoin, Irene V Mateo-Leach, Pim van der Harst, Torsten Plösch, Rudolf A de Boer
Vitamin D deficiency is one of the most common nutritional deficiencies worldwide. Maternal vitamin D deficiency is associated with increased susceptibility to hypertension in offspring, but the reasons for this remain unknown. The aim of this study was to determine if parental vitamin D deficiency leads to altered DNA methylation in offspring that may relate to hypertension. Male and female Sprague-Dawley rats were fed a standard or vitamin D-depleted diet. After 10 wk, nonsibling rats were mated. The conceived pups received standard chow...
December 1, 2016: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/27692350/-epigenetics-implication-in-autism-spectrum-disorders-a-review
#9
M Hamza, S Halayem, R Mrad, S Bourgou, F Charfi, A Belhadj
BACKGROUND: The etiology of autism spectrum disorders (ASD) is complex and multifactorial, and the roles of genetic and environmental factors in its emergence have been well documented. Current research tends to indicate that these two factors act in a synergistic manner. The processes underlying this interaction are still poorly known, but epigenetic modifications could be the mediator in the gene/environment interface. The epigenetic mechanisms have been implicated in susceptibility to stress and also in the pathogenesis of psychiatric disorders including depression and schizophrenia...
September 27, 2016: L'Encéphale
https://www.readbyqxmd.com/read/27679579/calcium-sensing-receptor-gene-regulation-of-expression
#10
REVIEW
Geoffrey N Hendy, Lucie Canaff
The human calcium-sensing receptor gene (CASR) has 8 exons, and localizes to chromosome 3q. Exons 1A and 1B encode alternative 5'-untranslated regions (UTRs) that splice to exon 2 encoding the AUG initiation codon. Exons 2-7 encode the CaSR protein of 1078 amino acids. Promoter P1 has TATA and CCAAT boxes upstream of exon 1A, and promoter P2 has Sp1/3 motifs at the start site of exon 1B. Exon 1A transcripts from the P1 promoter are reduced in parathyroid tumors and colon carcinomas. Studies of colon carcinomas and neuroblastomas have emphasized the importance of epigenetic changes-promoter methylation of the GC-rich P2 promoter, histone acetylation-as well as involvement of microRNAs in bringing about CASR gene silencing and reduced CaSR expression...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27650654/structural-analysis-and-biological-activities-of-bxl0124-a-gemini-analog-of-vitamin-d
#11
Anna Y Belorusova, Nanjoo Suh, Hong Jin Lee, Jae Young So, Hubert Maehr, Natacha Rochel
Gemini analogs of calcitriol, characterized by the extension of the C21-methyl group of calcitriol with a second chain, act as agonists of the vitamin D receptor (VDR). This second side chain of gemini is accommodated in a new cavity inside the VDR created by the structural rearrangement of the protein core. The resulting conformational change preserves the active state of the receptor and bestows gemini compounds with biological activities that exceed those of calcitriol. Of particular interest are gemini's anti-cancer properties, and in this study we demonstrate anti-proliferative and tumor-reducing abilities of BXL0124 and BXL0097, differing only by the presence or absence, respectively, of the methylene group on the A ring...
September 17, 2016: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27589858/hypermethylation-of-the-casr-and-vdr-genes-in-the-parathyroid-glands-in-chronic-kidney-disease-rats-with-high-phosphate-diet
#12
Taketo Uchiyama, Norifumi Tatsumi, Sahoko Kamejima, Tsuyoshi Waku, Ichiro Ohkido, Keitaro Yokoyama, Takashi Yokoo, Masataka Okabe
Chronic kidney disease (CKD) disrupts mineral homeostasis and its representative pathosis is defined as secondary hyperparathyroidism (SHPT). SHPT occurs during the early course of progressive renal insufficiency, and is associated with mortality and cardiovascular events. SHPT results in reduction of calcium-sensing receptor (CaSR) and vitamin D receptor (VDR) in the parathyroid glands during CKD. However, the precise mechanism of CaSR and VDR reduction is largely unknown. CKD was induced through two-step 5/6 nephrectomy, and then CKD rats and sham-operated rats were maintained for 8 weeks on diets containing 0...
October 2016: Human Cell
https://www.readbyqxmd.com/read/27583818/correction-race-ethnicity-specific-association-of-vitamin-d-and-global-dna-methylation-cross-sectional-and-interventional-findings
#13
Haidong Zhu, Jigar Bhagatwala, Ying Huang, Norman K Pollock, Samip Parikh, Anas Raed, Bernard Gutin, Gregory A Harshfield, Yanbin Dong
[This corrects the article DOI: 10.1371/journal.pone.0152849.].
2016: PloS One
https://www.readbyqxmd.com/read/27526315/expression-and-methylation-in-posttraumatic-stress-disorder-and-resilience-evidence-of-a-role-for-odorant-receptors
#14
Yuanxiu Chen, Xin Li, Ihori Kobayashi, Daisy Tsao, Thomas A Mellman
Post-traumatic stress disorder (PTSD) is a common and potentially disabling disorder that develops in 1/5 to 1/3 of people exposed to severe trauma. Twin studies indicate that genetic factors account for at least one third of the variance in the risk for developing PTSD, however, the specific role for genetic factors in the pathogenesis of PTSD is not well understood. We studied genome-wide gene expression and DNA methylation profiles in 12 participants with PTSD and 12 participants who were resilient to similar severity trauma exposure...
November 30, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/27524818/metabolomics-analysis-of-serum-25-hydroxy-vitamin-d-in-the-alpha-tocopherol-beta-carotene-cancer-prevention-atbc-study
#15
Shakira M Nelson, Orestis A Panagiotou, Gabriella M Anic, Alison M Mondul, Satu Männistö, Stephanie J Weinstein, Demetrius Albanes
BACKGROUND: Vitamin D has been discussed in the context of cardiovascular disease, cancer, bone health and other outcomes. Epidemiological studies have reported on the importance of vitamin D in cancer prevention and treatment. The discovery of vitamin D-associated metabolites through agnostic metabolomics analyses offers a new approach for elucidating disease aetiology and health-related pathway identification. METHODS: Baseline serum 25-hydroxy-vitamin D [25(OH)D] and 940 serum metabolites were measured in 392 men from eight nested cancer case-control studies in the Alpha-Tocopherol, Beta-Carotene Cancer Prevention Study of Finnish male smokers (aged 50-69 years)...
August 14, 2016: International Journal of Epidemiology
https://www.readbyqxmd.com/read/27516247/structure-elucidation-of-a-non-branched-and-entangled-heteropolysaccharide-from-tremella-sanguinea-peng-and-its-antioxidant-activity
#16
Zhaojing Wang, Yawei Zeng, Dianhui Luo
A crude polysaccharide was extracted from the edible fungi Tremella sanguinea Peng, and a polysaccharide TSP-II (31.56%) was separated and purified from the crude polysaccharide. TSP-II was a homogeneous polysaccharide by the high-performance size-exclusion chromatography (HPSEC), had a molecular weight of 356kD and consisted mainly of mannose, xylose, galactose and glucose at a molar ratio 5.9:2.4:1:1.1. The structural assignment of TSP-II was carried out using fourier transform infrared spectroscopy (FTIR) analysis, periodate oxidation-smith degradation, partial hydrolysis with acid, methylation analysis and nuclear magnetic resonance (NMR) studies, and the repeating unit of TSP-II was thus determined...
November 5, 2016: Carbohydrate Polymers
https://www.readbyqxmd.com/read/27450565/vitamin-d-signaling-and-the-differentiation-of-developing-dopamine-systems
#17
Renata A N Pertile, Xiaoying Cui, Darryl W Eyles
Vitamin D regulates multiple factors including those involved in the ontogeny of dopaminergic systems. It has been shown that in neonatal rats maternally deprived of vitamin D, dopamine (DA) turnover is decreased with associated reductions in one catabolic enzyme, catechol-o-methyl transferase (COMT). To directly examine this signaling relationship, in the present study we have over-expressed the vitamin D receptor (VDR) in neuroblastoma SH-SY5Y cells in order to examine the mechanisms by which the active vitamin D hormone, 1,25(OH)2D3, via its receptor VDR, affects DA production and turnover...
October 1, 2016: Neuroscience
https://www.readbyqxmd.com/read/27446223/antioxidant-activity-and-characterization-of-one-new-polysaccharide-obtained-from-perigord-truffle-tuber-huidongense
#18
Yong-Feng Chen, Wen-Wen Jiang, Shi-Qi Zhang, Jian-Quan Kan, Yong Liang
As a medicinal and edible fungus parasitizing on the trees, Perigord Truffle (Tuber huidongense) is well known for its delicious taste, unique smell, and high medical value for healthcare. One new water-soluble nonstarch polysaccharide (PST-W with the yield of 0.41%) from Perigord Truffle (Tuber huidongense) was purified and identified on structural characteristics for the first time. The characterizations of PST-W were studied on physicochemical properties, main components of monosaccharide(s), and molecular structure...
2016: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/27436815/genetic-epidemiology-of-melanoma
#19
Simone Ribero, Dan Glass, Veronique Bataille
The field of melanoma genetics is moving at great pace with new platforms to investigate single nucleotide polymorphism, genome sequencing, gene expression, and methylation. Melanoma incidence is still rising mainly because of screening campaigns, which has increased the number of reported melanomas. However, mortality due to melanoma is not decreasing. Many cutaneous phenotypic risk factors have been linked to melanoma, but the association with UV radiation is very complex. The level of vitamin D affects both the risk of melanoma and prognosis, but more studies are needed...
August 1, 2016: European Journal of Dermatology: EJD
https://www.readbyqxmd.com/read/27435264/methyl-donor-deficiency-impairs-bone-development-via-peroxisome-proliferator-activated-receptor-%C3%AE-coactivator-1%C3%AE-dependent-vitamin-d-receptor-pathway
#20
Eva Feigerlova, Lea Demarquet, Hassan Melhem, Rose Ghemrawi, Shyue-Fang Battaglia-Hsu, Essi Ewu, Jean-Marc Alberto, Deborah Helle, Georges Weryha, Jean-Louis Guéant
Deficiency in methyl donor (folate and vitamin B12) and in vitamin D is independently associated with altered bone development. Previously, methyl donor deficiency (MDD) was shown to weaken the activity of nuclear receptor coactivator, peroxisome proliferator-activated receptor-γ coactivator-1α (PGC1α), for nuclear signaling in rat pups, including estrogen receptor-α and estrogen-related receptor-α; its effect on vitamin D receptor (VDR) signaling, however, is unknown. We studied bone development under MDD in rat pups and used human MG-63 preosteoblast cells to better understand the associated molecular mechanism...
October 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
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