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https://www.readbyqxmd.com/read/28327211/reduced-fetal-vitamin-d-status-by-maternal-undernutrition-during-discrete-gestational-windows-in-sheep
#1
J K Cleal, M R Hargreaves, K R Poore, J C Y Tang, W D Fraser, M A Hanson, L R Green
Placental transport of vitamin D and other nutrients (e.g. amino acids, fats and glucose) to the fetus is sensitive to maternal and fetal nutritional cues. We studied the effect of maternal calorific restriction on fetal vitamin D status and the placental expression of genes for nutrient transport [aromatic T-type amino acid transporter-1 (TAT-1); triglyceride hydrolase/lipoprotein uptake facilitator lipoprotein lipase (LPL)] and vitamin D homeostasis [CYP27B1; vitamin D receptor (VDR)], and their association with markers of fetal cardiovascular function and skeletal muscle growth...
March 22, 2017: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/28296915/genetic-variation-in-the-vitamin-d-pathway-cyp2r1-gene-predicts-sustained-hbeag-seroconversion-in-chronic-hepatitis-b-patients-treated-with-pegylated-interferon-a-multicenter-study
#2
Kessarin Thanapirom, Sirinporn Suksawatamnuay, Wattana Sukeepaisarnjareon, Tawesak Tanwandee, Phunchai Charatcharoenwitthaya, Satawat Thongsawat, Apinya Leerapun, Teerha Piratvisuth, Rattana Boonsirichan, Chalermrat Bunchorntavakul, Chaowalit Pattanasirigool, Bubpha Pornthisarn, Supot Tantipanichtheerakul, Ekawee Sripariwuth, Woramon Jeamsripong, Teeranan Sanpajit, Yong Poovorawan, Piyawat Komolmit
Evidence of a role of vitamin D in the immune system is increasing. Low serum vitamin D is associated with increased hepatitis B virus replication. Genome-wide association study (GWAS) data has revealed a number of the single nucleotide polymorphisms (SNPs) within the vitamin D synthetic pathway that affect vitamin D functions. We aimed to determine the association between SNPs in the vitamin D gene cascade and response to pegylated interferon (PegIFN) therapy in hepatitis B e-antigen (HBeAg)-positive patients...
2017: PloS One
https://www.readbyqxmd.com/read/28291736/association-of-vitamin-d-related-genetic-variations-and-treatment-response-to-pegylated-interferon-in-patients-with-chronic-hepatitis-b
#3
Umaporn Limothai, Natthaya Chuaypen, Apichaya Khlaiphuengsin, Salyavit Chittmittraprap, Yong Poovorawan, Pisit Tangkijvanich
BACKGROUND: Vitamin D, a potent immune-modulator, has been linked to the pathogenesis of chronic hepatitis B (CHB). This study was aimed at investigating the association between single nucleotide polymorphisms (SNPs) in vitamin D-related genes and treatment response to pegylated interferon (PEG-IFN) in patients with CHB. METHODS: A total 275 Thai patients (122 HBeAg-positive and 153 HBeAg-negative CHB) treated with 48-week PEG-IFN were recruited. Virological response (VR) at 48 weeks post treatment was defined as HBeAg seroconversion plus HBV DNA <2,000 IU/mL for HBeAg-positive CHB and HBV DNA <2,000 IU/mL for HBeAg-negative CHB...
March 14, 2017: Antiviral Therapy
https://www.readbyqxmd.com/read/28243241/high-expression-of-antiviral-and-vitamin-d-pathway-genes-are-a-natural-characteristic-of-a-small-cohort-of-hiv-1-exposed-seronegative-individuals
#4
Wbeimar Aguilar-Jimenez, Irma Saulle, Daria Trabattoni, Francesca Vichi, Sergio Lo Caputo, Francesco Mazzotta, Maria T Rugeles, Mario Clerici, Mara Biasin
Natural resistance to HIV-1 infection is influenced by genetics, viral-exposure, and endogenous immunomodulators such as vitamin D (VitD), being a multifactorial phenomenon that characterizes HIV-1-exposed seronegative individuals (HESNs). We compared mRNA expression of 10 antivirals, 5 immunoregulators, and 3 VitD pathway genes by qRT-PCR in cells of a small cohort of 11 HESNs, 16 healthy-controls (HCs), and 11 seropositives (SPs) at baseline, in response to calcidiol (VitD precursor) and/or aldithriol-2-(AT2)-inactivated HIV-1...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28231019/pro-inflammatory-cytokines-impair-vitamin-d-induced-host-defense-in-cultured-airway-epithelial-cells
#5
Jasmijn A Schrumpf, Gimano D Amatngalim, Joris B Veldkamp, Renate M Verhoosel, Dennis K Ninaber, Soledad R Ordonez, Anne M van der Does, Henk P Haagsman, Pieter S Hiemstra
Vitamin D is a regulator of host defense against infections and induces expression of the antimicrobial peptide hCAP18/LL-37. Vitamin D deficiency is associated with chronic inflammatory lung diseases and respiratory infections. However, it is incompletely understood if and how (chronic) airway inflammation affects vitamin D metabolism and action. We hypothesized that long-term exposure of primary bronchial epithelial cells (PBEC) to pro-inflammatory cytokines alters their vitamin D metabolism, antibacterial activity and expression of hCAP18/LL-37...
February 23, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28218743/vitamin-d-signaling-and-melanoma-role-of-vitamin-d-and-its-receptors-in-melanoma-progression-and-management
#6
REVIEW
Andrzej T Slominski, Anna A Brożyna, Michal A Zmijewski, Wojciech Jóźwicki, Anton M Jetten, Rebecca S Mason, Robert C Tuckey, Craig A Elmets
Ultraviolet B (UVB), in addition to having carcinogenic activity, is required for the production of vitamin D3 (D3) in the skin which supplies >90% of the body's requirement. Vitamin D is activated through hydroxylation by 25-hydroxylases (CYP2R1 or CYP27A1) and 1α-hydroxylase (CYP27B1) to produce 1,25(OH)2D3, or through the action of CYP11A1 to produce mono-di- and trihydroxy-D3 products that can be further modified by CYP27B1, CYP27A1, and CYP24A1. The active forms of D3, in addition to regulating calcium metabolism, exert pleiotropic activities, which include anticarcinogenic and anti-melanoma effects in experimental models, with photoprotection against UVB-induced damage...
February 20, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28178628/25-hydroxyvitamin-d-1-%C3%AE-hydroxylase-in-apoliporotein-e-knockout-mice-the-role-of-protecting-vascular-smooth-muscle-cell-from-calcification
#7
Wei Xiang, Wang Liao, Zhuwen Yi, Xiaojie He, Yan Ding
Previous publications widely reported that 25-hydroxyvitamin D-1-α-hydroxylase (CYP27B1) regulated the metabolism of 25-hydroxyvitamin D3, which has a close association between altered activity of vitamin D and vascular calcification has been reported in various human diseases, including chronic kidney disease, osteoporosis and atherosclerosis. Vascular calcification is a clinically significant component of atherosclerosis and may be promoted by ROS associated inflammatory. In this study, we evaluated the effect of 25-hydroxyvitamin D-1-α-hydroxylase on the atherosclerosis disease both in apolipoprotein (apo) E-/- mice and wild-type mice...
April 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28161533/prevalence-determinants-and-clinical-correlates-of-vitamin-d-deficiency-in-patients-with-chronic-obstructive-pulmonary-disease-in-london-uk
#8
David A Jolliffe, Wai Yee James, Richard L Hooper, Neil C Barnes, Claire L Greiller, Kamrul Islam, Angshu Bhowmik, Peter M Timms, Raj K Rajakulasingam, Aklak B Choudhury, David E Simcock, Elina Hyppönen, Robert T Walton, Christopher J Corrigan, Christopher J Griffiths, Adrian R Martineau
Vitamin D deficiency is common in patients with chronic obstructive pulmonary disease (COPD), yet a comprehensive analysis of environmental and genetic determinants of serum 25-hydroxyvitamin D (25[OH]D) concentration in patients with this condition is lacking. We conducted a multi-centre cross-sectional study in 278 COPD patients aged 41-92 years in London, UK. Details of potential environmental determinants of vitamin D status and COPD symptom control and severity were collected by questionnaire, and blood samples were taken for analysis of serum 25(OH)D concentration and DNA extraction...
February 1, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28107527/effects-of-the-administration-of-25-oh-vitamin-d3-in-an-experimental-model-of-chronic-kidney-disease-in-animals-null-for-1-alpha-hydroxylase
#9
Noelia Torremadé, Milica Bozic, David Goltzman, Elvira Fernandez, José M Valdivielso
The final step in vitamin D activation is catalyzed by 1-alpha-hydroxylase (CYP27B1). Chronic kidney disease (CKD) is characterized by low levels of both 25(OH)D3 and 1,25(OH)2D3 provoking secondary hyperparathyroidism (2HPT). Therefore, treatments with active or native vitamin D compounds are common in CKD to restore 25(OH)D3 levels and also to decrease PTH. This study evaluates the dose of 25(OH)D3 that restores parathyroid hormone (PTH) and calcium levels in a model of CKD in CYP27B1-/- mice. Furthermore, we compare the safety and efficacy of the same dose in CYP27B1+/+ animals...
2017: PloS One
https://www.readbyqxmd.com/read/28093352/cyp24a1-loss-of-function-clinical-phenotype-of-monoallelic-and-biallelic-mutations
#10
REVIEW
Thomas O Carpenter
CYP24A1, encoding the vitamin D-24-hydroxylase, is of major clinical and physiologic importance, serving to regulate the catabolism of 1,25-(OH)2D, the physiologically active vitamin D metabolite. In addition to facilitating catabolism of 1,25-(OH)2D, CYP24A1 also enhances the turnover and elimination of 25-OHD, the abundant precursor metabolite and storage form of the vitamin. CYP24A1 can be stimulated hormonally by 1,25-(OH)2D and by FGF23, whereas CYP27B1, encoding the vitamin D-1α-hydroxylase, is stimulated hormonally by parathyroid hormone (PTH) and downregulated by FGF23...
January 13, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28070798/does-vitamin-d-play-a-role-in-autoimmune-endocrine-disorders-a-proof-of-concept
#11
REVIEW
Barbara Altieri, Giovanna Muscogiuri, Luigi Barrea, Chantal Mathieu, Carla V Vallone, Luca Mascitelli, Giorgia Bizzaro, Vincenzo M Altieri, Giacomo Tirabassi, Giancarlo Balercia, Silvia Savastano, Nicola Bizzaro, Cristina L Ronchi, Annamaria Colao, Alfredo Pontecorvi, Silvia Della Casa
In the last few years, more attention has been given to the "non-calcemic" effect of vitamin D. Several observational studies and meta-analyses demonstrated an association between circulating levels of vitamin D and outcome of many common diseases, including endocrine diseases, chronic diseases, cancer progression, and autoimmune diseases. In particular, cells of the immune system (B cells, T cells, and antigen presenting cells), due to the expression of 1α-hydroxylase (CYP27B1), are able to synthesize the active metabolite of vitamin D, which shows immunomodulatory properties...
January 9, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28054069/challenge-and-perspective-the-relevance-of-ultraviolet-uv-radiation-and-the-vitamin-d-endocrine-system-vdes-for-psoriasis-and-other-inflammatory-skin-diseases
#12
Jörg Reichrath, Roman Saternus, Thomas Vogt
During evolution, the ability of many organisms to synthesize vitamin D photochemically represented, and still represents, a major driving factor for the development of life on earth. In humans because not more than 10-20% of the requirement of vitamin D can be satisfied by the diet (under most living conditions in the US and Europe), the remaining 80-90% need to be photochemically synthesized in the skin through the action of solar or artificial ultraviolet-B (UV-B) radiation. The skin is a key organ of the human body's vitamin D endocrine system (VDES), representing both the site of vitamin D synthesis and a target tissue for biologically active vitamin D metabolites...
January 5, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28029444/associations-between-serum-vitamin-d-and-genetic-variants-in-vitamin-d-pathways-and-age-related-macular-degeneration-in-the-european-eye-study
#13
Gareth J McKay, Ian S Young, Ann McGinty, Graham C G Bentham, Usha Chakravarthy, Mati Rahu, Johan Seland, Gisele Soubrane, Laura Tomazzoli, Fotis Topouzis, Jesus Vioque, Paulus T V M de Jong, Astrid E Fletcher
PURPOSE: To study associations between early and late age-related macular degeneration (AMD) and neovascular AMD (nvAMD) with serum 25-hydroxy vitamin D (25(OH)D) and genetic variants in vitamin D pathway genes. DESIGN: Population-based, cross-sectional study in a random sample aged 65 years or older from 7 European countries. PARTICIPANTS: Of 4753 participants, 4496 (2028 men and 2468 women), with a mean age of 73 years, provided a blood sample; 2137 had no signs of AMD, 2209 had early AMD, and 150 had late AMD, of whom 104 had nvAMD...
January 2017: Ophthalmology
https://www.readbyqxmd.com/read/28025137/nongenomic-effects-of-1%C3%AE-25-dihydroxyvitamin-d3-on-cartilage-formation-deduced-from-comparisons-between-cyp27b1-and-vdr-knockout-mice
#14
Yoshihisa Hirota, Kimie Nakagawa, Shino Mimatsu, Natsumi Sawada, Toshiyuki Sakaki, Noboru Kubodera, Maya Kamao, Naoko Tsugawa, Yoshitomo Suhara, Toshio Okano
The active form of vitamin D, 1α,25-dihydroxyvitamin D3 (1α,25D3), plays an important role in the maintenance of calcium (Ca) homeostasis, bone formation, and cell proliferation and differentiation via nuclear vitamin D receptor (VDR). It is formed by the hydroxylation of vitamin D at the 1α position by 25-hydroxyvitamin D 1α-hydroxylase (CYP27B1) in the kidney. However, Cyp27b1(-/-) mice, deficient in CYP27B1, and VDR-deficient mice (Vdr(-/-)) have not been extensively examined, particularly in a comparative framework...
January 29, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28009432/genetic-polymorphisms-of-vitamin-d-receptor-vdr-cyp27b1-and-cyp24a1-genes-and-the-risk-of-colorectal-cancer
#15
Verônica Marques Vidigal, Tiago Donizetti Silva, Juliana de Oliveira, Célia Aparecida Marques Pimenta, Aledson Vitor Felipe, Nora Manoukian Forones
INTRODUCTION: Vitamin D receptor (VDR) and proteins encoded by the genes CYP27B2 and CYP24A1 involved in the production and inactivation of vitamin D can influence vitamin D and the susceptibility to colorectal cancer (CRC). The objective of this study was to investigate the relationship between the risk of CRC and polymorphisms in VDR, CYP27B1 and CYP24A1, lifestyle and dietary habits. METHODS: The study included 152 patients with CRC and 321 controls. All participants answered a questionnaire on their dietary habits, alcohol consumption and smoking habits...
December 22, 2016: International Journal of Biological Markers
https://www.readbyqxmd.com/read/28001444/vitamin-d-receptor-expression-in-plasmablastic-lymphoma-and-myeloma-cells-confers-susceptibility-to-vitamin-d
#16
Duncan M Gascoyne, Linden Lyne, Hayley Spearman, Francesca M Buffa, Elizabeth J Soilleux, Alison H Banham
Plasmablastic B-cell malignancies include plasmablastic lymphoma and subsets of multiple myeloma and diffuse large B-cell lymphoma (DLBCL). These diseases can be difficult to diagnose and treat, and lack well-characterised cell line models. Here, immunophenotyping and FOXP1 expression profiling identified plasmablastic characteristics in DLBCL cell lines HLY-1 and SU-DHL-9, associated with CTNNAL1, HPGD, RORα, IGF1 and/or vitamin D receptor (VDR) transcription. We demonstrated VDR protein expression in primary plasmablastic tumour cells, and confirmed in cell lines expression of both VDR and the metabolic enzyme CYP27B1, which catalyses active vitamin D3 production...
December 21, 2016: Endocrinology
https://www.readbyqxmd.com/read/27978548/vitamin-d-receptor-genotype-vitamin-d3-supplementation-and-risk-of-colorectal-adenomas-a-randomized-clinical-trial
#17
Elizabeth L Barry, Janet L Peacock, Judy R Rees, Roberd M Bostick, Douglas J Robertson, Robert S Bresalier, John A Baron
Importance: Despite epidemiological and preclinical evidence suggesting that vitamin D and calcium inhibit colorectal carcinogenesis, daily supplementation with these nutrients for 3 to 5 years was not found to significantly reduce the risk of recurrent colorectal adenomas in a recent randomized clinical trial. Objective: To investigate whether common variants in 7 vitamin D and calcium pathway genes (VDR, GC, DHCR7, CYP2R1, CYP27B1, CYP24A1, and CASR) modify the effects of vitamin D3 or calcium supplementation on colorectal adenoma recurrence...
December 15, 2016: JAMA Oncology
https://www.readbyqxmd.com/read/27977320/selection-of-high-quality-spermatozoa-may-be-promoted-by-activated-vitamin-d-in-the-woman
#18
Lasse Bøllehuus Hansen, Anders Rehfeld, Rosanna de Neergaard, John Erik Nielsen, Lea Hedegaard Iversen, Ida Marie Boisen, Li Juel Mortensen, Beate Lanske, Kristian Almstrup, Elisabeth Carlsen, Anders Hayden Berg, Niels Jørgensen, Anders Nyboe Andersen, Anders Juul, Martin Blomberg Jensen
CONTEXT: The vitamin D receptor (VDR) and enzymes involved in activation (CYP2R1, CYP27B1) and inactivation (CYP24A1) of vitamin D are expressed in ovary, testes, and spermatozoa. OBJECTIVE: Determine responsiveness to 1,25-dihydroxyvitamin D (1,25(OH)2D3) in spermatozoa from normal and infertile men, identify site of exposure and how 1,25(OH)2D3 influences sperm function. DESIGN: Spermatozoa expressing VDR, CYP2R1, CYP27B1, and CYP24A1 were analyzed in normal and infertile men...
December 15, 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27973470/nutritional-rickets-vitamin-d-calcium-and-the-genetic-make-up
#19
Mohamed El Kholy, Heba Elsedfy, Monica Fernández-Cancio, Rasha Tarif Hamza, Nermine Hussein Amr, Alaa Youssef Ahmed, Nadin Nabil Toaima, Laura Audí
BACKGROUND: The prevalence of vitamin D (vitD) deficiency presenting as rickets is increasing worldwide. Insufficient sun exposure, vitD administration, and/or calcium intake are the main causes. However, vitD system-related genes may also have a role. METHODS: Prospective study: 109 rachitic children completed a 6-mo study period or until rachitic manifestations disappeared. Thirty children were selected as controls. Clinical and biochemical data were evaluated at baseline in patients and controls and biochemistry re-evaluated at radiological healing...
December 14, 2016: Pediatric Research
https://www.readbyqxmd.com/read/27966076/the-level-of-testosterone-vitamin-d-and-irregular-menstruation-more-important-than-omega-3-in-non-symptomatic-women-will-define-the-fate-of-multiple-scleroses-in-future
#20
Shima Tavakol, Sahar Shakibapour, Sepideh Arbabi Bidgoli
Multiple sclerosis is one of the most salient degenerative disorders of CNS with dysregulated immune process that resulted in axonal damage and demyelination. In the present investigation, the serum level of testosterone was assessed in women who were struggling with multiple sclerosis (MS). Also, the level of omega-3, vitamin D, and the irregular menstruation in women 5 years before the onset MS symptoms were surveyed. Although the levels of omega-3 and vitamin D in women MS patients were non-significant and significantly less than the healthy ones, they were significantly less in the whole population of MS patients...
December 13, 2016: Molecular Neurobiology
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