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https://www.readbyqxmd.com/read/29050663/vitamin-d-deficiency-induces-eosinophil-spontaneous-activation
#1
Huiying Lu, Rui-Di Xie, Ritian Lin, Cuicui Zhang, Xiao-Jun Xiao, Lin-Jing Li, Zhi-Qiang Liu, Li-Tao Yang, Bai-Sui Feng, Zhan-Ju Liu, Ping-Chang Yang
Eosinophils (Eo) play a critical role in immunity and immune inflammation. The maintenance of Eo homeostasis is not fully understood yet. Vitamin D (VitD) is involved in the regulation of a large number of biochemical reactions. This study tests a hypothesis that VitD receptor (VDR) contributes to the homeostasis of Eos. In this study, EoL-1 cells (an Eo cell line) were cultured in the presence or absence of calcitriol. The Eo-mediators, including major basic protein (MBP), Eo peroxidase (EPX), Eo cationic protein (ECP) and Eo-derived neurotoxin (EDN), were assessed in the culture supernatant and in EoL-1 cells...
October 12, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/29050147/-association-of-vitamin-d-receptor-gene-polymorphisms-with-idiopathic-hypoparathyroidism-phenotypes
#2
T T Quan, M Nie, Y P Li, Y Jiang, M Li, W B Xia, X W Meng, X P Xing, O Wang
Objective: To explore the association of vitamin D receptor (VDR) gene polymorphisms with idiopathic hypoparathyroidism (IHP). Methods: Two hundred and three patients with IHP and 209 healthy age- and sex-matched subjects were recruited at Peking Union Medical College Hospital between December 1987 and December 2015 as case group and control group, respectively. The VDR gene polymorphisms including rs739837, rs3847987 and rs2228570 were analyzed by Sequenom Mass Array. The frequency of different genotypes and alleles was detected, then their association with pathogenesis of IHP was analyzed...
September 26, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29039779/seco-b-ring-steroidal-dienynes-with-aromatic-d-ring-design-synthesis-and-biological-evaluation
#3
Marcin Szybinski, Pawel Brzeminski, Adrian Fabisiak, Klaudia Berkowska, Ewa Marcinkowska, Rafal R Sicinski
Continuing our structure-activity studies on the vitamin D analogs with the altered intercyclic seco-B-ring fragment, we designed compounds possessing dienyne system conjugated with the benzene D ring. Analysis of the literature data and the docking experiments seemed to indicate that the target compounds could mimic the ligands with a good affinity to the vitamin D receptor (VDR). Multi-step synthesis of the C/D-ring building block of the tetralone structure was achieved and its enol triflate was coupled with the known A-ring fragments, possessing conjugated enyne moiety, using Sonogashira protocol...
October 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29033051/genetics-of-restless-legs-syndrome-an-update
#4
REVIEW
Félix J Jiménez-Jiménez, Hortensia Alonso-Navarro, Elena García-Martín, José A G Agúndez
A major role of genetic factors in the risk of developing restless legs syndrome (RLS) is supported by the high frequency of positive family history of RLS in patients affected with this disease, and the higher concordance rates in monozygotic twins compared with dizygotic ones in twin studies. In this review we have focused on those reports describing inheritance patterns of RLS, genetic anticipation, the results of studies performed on positivity of family history of RLS, twin studies, linkage studies in familial RLS, genome-wide association studies (GWAS), exome sequencing studies, and case-control association studies on candidate genes in RLS...
August 31, 2017: Sleep Medicine Reviews
https://www.readbyqxmd.com/read/29032145/genetic-association-analysis-of-vitamin-d-receptor-gene-polymorphisms-and-obesity-related-phenotypes
#5
Correa-Rodríguez María, Carrillo-Ávila Jose Antonio, Schmidt-RioValle Jacqueline, González-Jiménez Emilio, Vargas Sofia, Martin Javier, Rueda-Medina Blanca
Vitamin D has been established as a key factor in the development of obesity through the vitamin D receptor (VDR). The aim of this study was to investigate the contribution of the VDR gene to obesity-related phenotypes in a population of Caucasian young adults. The study population consisted of 701 healthy Spanish young adults (mean age 20.41±2.48). Three single-nucleotide polymorphisms (SNPs) of VDR (TaqI, BsmI and FokI) were selected as genetic markers. Body composition measurements including weight, body mass index (BMI), fat mass (FM), percentage of fat mass (PFM), fat-free mass (FFM) and visceral fat level (VFL) were analysed...
October 12, 2017: Gene
https://www.readbyqxmd.com/read/29030554/hdx-reveals-the-conformational-dynamics-of-dna-sequence-specific-vdr-co-activator-interactions
#6
Jie Zheng, Mi Ra Chang, Ryan E Stites, Yong Wang, John B Bruning, Bruce D Pascal, Scott J Novick, Ruben D Garcia-Ordonez, Keith R Stayrook, Michael J Chalmers, Jeffrey A Dodge, Patrick R Griffin
The vitamin D receptor/retinoid X receptor-α heterodimer (VDRRXRα) regulates bone mineralization via transcriptional control of osteocalcin (BGLAP) gene and is the receptor for 1α,25-dihydroxyvitamin D3 (1,25D3). However, supra-physiological levels of 1,25D3 activates the calcium-regulating gene TRPV6 leading to hypercalcemia. An approach to attenuate this adverse effect is to develop selective VDR modulators (VDRMs) that differentially activate BGLAP but not TRPV6. Here we present structural insight for the action of a VDRM compared with agonists by employing hydrogen/deuterium exchange...
October 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/29018141/vitamin-d-regulation-of-gdnf-ret-signaling-in-dopaminergic-neurons
#7
Renata A N Pertile, Xiaoying Cui, Luke Hammond, Darryl W Eyles
1,25(OH)2D3 (vitamin D) appears essential for the normal development of dopaminergic neurons. Vitamin D affects dopamine synthesis and metabolism as well as expression of glial cell line-derived neurotrophic factor (GDNF), which is crucial for the survival of dopaminergic neurons. We investigated the role of vitamin D on GDNF and its receptors protooncogene tyrosine-protein kinase receptor Ret (C-Ret) and GDNF family receptor alpha 1 (GFRα1) signaling. To this end, we used a developmental vitamin D-deficient rat model and SH-SY5Y cells transfected with vitamin D receptor (VDR)...
October 10, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28990310/the-interaction-between-vitamin-d-receptor-polymorphisms-and-sun-exposure-around-time-of-diagnosis-influences-melanoma-survival
#8
Irene Orlow, Yang Shi, Peter A Kanetsky, Nancy E Thomas, Li Luo, Sergio Corrales Guerrero, Anne E Cust, Lidia Sacchetto, Roberto Zanetti, Stefano Rosso, Bruce K Armstrong, Terence Dwyer, Alison Venn, Richard P Gallagher, Stephen B Gruber, Loraine D Marrett, Hoda Anton-Culver, Klaus Busam, Colin B Begg, Marianne Berwick
Evidence on the relationship between the vitamin D pathway and outcomes in melanoma is growing, although it is not always clear. We investigated the impact of measured levels of sun exposure at diagnosis on associations of vitamin D receptor gene (VDR) polymorphisms and melanoma-death in 3336 incident primary melanoma cases. Interactions between six SNPs and a common 3' end haplotype were significant (p<0.05). These SNPs, and a haplotype, had a statistically significant association with survival among subjects exposed to high UVB in multivariable regression models, and exerted their effect in the opposite direction among those with low UVB...
October 9, 2017: Pigment Cell & Melanoma Research
https://www.readbyqxmd.com/read/28986304/molecular-profiles-of-oxyphilic-and-chief-cell-parathyroid-adenoma
#9
Ming Lu, Hanna Kjellin, Omid Fotouhi, Linkiat Lee, Inga-Lena Nilsson, Felix Haglund, Anders Höög, Janne Lehtiö, Catharina Larsson
CONTEXT: Parathyroid adenomas may be composed of chief cells (conventional or water-clear), oxyphilic cells or a mixture of both cells. The molecular background is rarely studied. OBJECTIVE: To molecularly characterize parathyroid adenomas of different cell type composition. DESIGN: Chief and oxyphilic cell adenomas were compared in a cohort of 664 sporadic cases. Extensive analyses of parathyroid tissues were performed in subgroup. Gene expressions of known parathyroid-related genes were quantified by qRT-PCR...
October 3, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28978869/vitamin-d-receptor-gene-variation-dietary-intake-and-bone-mineral-density-in-obese-women-a-cross-sectional-study
#10
Sajjad Moradi, Leila Khorrami-Nezhad, Zhila Maghbooli, Banafshe Hosseini, Seyed Ali Keshavarz, Khadijeh Mirzaei
Osteoporosis and fragility fractures have been regarded as important public health concerns. We investigated their possible association with vitamin D receptor (VDR) FOK1 polymorphisms (rs10735810) and dietary parameters such as calcium and vitamin D intake. A total of 264 Iranian obese women (BMI>30 kg/m(2)) were categorized based on the FOK1 genotype and divided into two groups: group one with the FF genotype (n=184) and the f allele carrier group with the Ff or ff genotype (n=80). The body composition, dietary intake and bone mineral density were assessed for all cases...
2017: Journal of Nutritional Science and Vitaminology
https://www.readbyqxmd.com/read/28976992/genetic-determinants-of-serum-25-hydroxyvitamin-d-concentration-during-pregnancy-and-type-1-diabetes-in-the-child
#11
Maija E Miettinen, Melissa C Smart, Leena Kinnunen, Valma Harjutsalo, Linnea Reinert-Hartwall, Irene Ylivinkka, Heljä-Marja Surcel, Christel Lamberg-Allardt, Graham A Hitman, Jaakko Tuomilehto
OBJECTIVE: The in utero environment plays an important role in shaping development and later life health of the fetus. It has been shown that maternal genetic factors in the metabolic pathway of vitamin D associate with type 1 diabetes in the child. In this study we analyzed the genetic determinants of serum 25-hydroxyvitamin D (25OHD) concentration during pregnancy in mothers whose children later developed type 1 diabetes and in control mothers. STUDY DESIGN: 474 mothers of type 1 diabetic children and 348 mothers of non-diabetic children were included in the study...
2017: PloS One
https://www.readbyqxmd.com/read/28970544/pharmacological-use-of-a-novel-scaffold-anomeric-n-n-diarylamino-tetrahydropyran-molecular-similarity-search-chemocentric-target-profiling-and-experimental-evidence
#12
Arramshetti Venkanna, Oh Wook Kwon, Sualiha Afzal, Cheongyun Jang, Kyo Hee Cho, Dharmendra K Yadav, Kang Kim, Hyeung-Geun Park, Kwang-Hoon Chun, Sun Yeou Kim, Mi-Hyun Kim
Rational drug design against a determined target (disease, pathway, or protein) is the main strategy in drug discovery. However, regardless of the main strategy, chemists really wonder how to maximize the utility of their new compounds by drug repositioning them as clinical drug candidates in drug discovery. In this study, we started our drug discovery "from curiosity in the chemical structure of a drug scaffold itself" rather than "for a specific target". As a new drug scaffold, anomeric diarylamino cyclic aminal scaffold 1, was designed by combining two known drug scaffolds (diphenylamine and the most popular cyclic ether, tetrahydropyran/tetrahydrofuran) and synthesized through conventional Brønsted acid catalysis and metal-free α-C(sp(3))-H functionalized oxidative cyclization...
October 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28963676/genetic-variants-of-tumor-necrosis-factor-%C3%AE-308g-a-rs1800629-but-not-toll-interacting-proteins-or-vitamin-d-receptor-genes-enhances-susceptibility-and-severity-of-malaria-infection
#13
Olusola Ojurongbe, Roland I Funwei, Tara J Snyder, Iman Farid, Najihah Aziz, Yi Li, Catherine O Falade, Bolaji N Thomas
Susceptibility to malaria infection has been associated with host genetic polymorphisms that differs between groups. We hypothesize that Toll-interacting proteins (TOLLIP), vitamin D receptor (VDR) and tumor necrosis factor-α (TNF) genes are significant contributors to susceptibility and disease severity in Plasmodium falciparum (Pf) infection. Our aim is to explore the genomic diversity and haplotype frequency of these genes, as well as extrapolate possible association with markers of severity, between malaria-infected and healthy controls...
September 30, 2017: Immunogenetics
https://www.readbyqxmd.com/read/28963501/1-25-oh-2-d3-induces-reactivation-and-death-of-kaposi-s-sarcoma-associated-herpesvirus-of-primary-effusion-lymphoma-cells
#14
Amit Kumar, Suchitra Mohanty, Piyanki Das, Sushil Kumar Sahu, Shanmugam Rajasubramaniam, Tathagata Choudhuri
Kaposi's sarcoma associated herpesvirus (KSHV) a gammaherpesvirus establishes perennial latency in the host with periodic reactivation. Occasionally change in the physiological condition like hypoxia, host cell differentiation can trigger the lytic switch and reactivation of the virus. The biologically active form of 1, 25(OH)2 D3 plays a critical role in the regulation of various physiological processes (e.g. regulation of mineral homeostasis and control of bone metabolism). Apart from its role in host physiology, 1, 25(OH)2 D3 has been implicated as a potential agent for the prevention and/or treatment of many a tumors...
September 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28962851/steroidal-pheromones-and-their-potential-target-sites-in-the-vomeronasal-organ
#15
Rodewald Andrea, Mills Daniel, M Veronika Gebhart, Gustav F Jirikowski
Steroids are important olfactory signals in most mammalian species. The vomeronasal organ has been suspected to be the primary target of pheromones. In rat vomeronasal sensory neurons express steroid binding proteins and nuclear receptors. Some binding globulins were found also in single ciliated cells of the non-sensory vomeronasal epithelium. Immunoelectron microscopy revealed VDR in olfactory microvilli and DPB in apical membrane protrusions of supporting sells within the sensory epithelium. Pilot behavioral studies with dogs showed increased sniffing duration upon exposure to low concentrations of vitamin D while higher concentrations were less effective...
September 26, 2017: Steroids
https://www.readbyqxmd.com/read/28961166/high-levels-of-circulating-type-ii-collagen-degradation-marker-ctx-ii-are-associated-with-specific-vdr-polymorphisms-in-patients-with-adult-vertebral-osteochondrosis
#16
Sabina Cauci, Marco Viganò, Laura de Girolamo, Paola De Luca, Carlotta Perucca Orfei, Giuseppe Banfi, Giovanni Lombardi, Marco Brayda-Bruno, Alessandra Colombini
Both vitamin D and collagen have roles in osteocartilaginous homeostasis. We evaluated the association between the circulating 25-hydroxyvitamin D (25(OH)D) type I and II collagen degradation products (CTx-I, and CTx-II), and four vitamin D receptor gene (VDR) polymorphisms, in Italian males affected by low back pain (LBP) due to herniation/discopathy and/or vertebral osteochondrosis. FokI, BsmI, ApaI, and TaqI VDR-polymorphisms were detected through PCR-restriction fragment length polymorphism (RFLP), and circulating 25(OH)D, CTx-I and CTx-II were measured by immunoassays in 79 patients (of which 26 had osteochondrosis) and 79 age-, sex- and body mass index (BMI)-matched healthy controls...
September 29, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28959253/methylation-of-the-vitamin-d-receptor-vdr-gene-together-with-genetic-variation-race-and-environment-influence-the-signaling-efficacy-of-the-toll-like-receptor-2-1-vdr-pathway
#17
Vanessa Meyer, Donovan Sean Saccone, Fidele Tugizimana, Furaha Florence Asani, Tamsyn Jacki Jeffery, Liza Bornman
BACKGROUND: The disparity in prevalence of infectious diseases across the globe is common knowledge. Vitamin D receptor (VDR)-mediated toll-like receptor (TLR) 2/1 signaling produces antimicrobial peptides, which is critical as a first line of defense in innate immunity. Numerous studies disclosed the independent role of genetic polymorphisms in this pathway, vitamin D status or season and more recently epigenetics, as factors contributing to infectious disease predisposition. Few studies address the interaction between environment, genetics, and epigenetics...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28958711/glycosylation-status-of-bone-sialoprotein-and-its-role-in-mineralization
#18
Lan Xu, Zhenqing Zhang, Xue Sun, Jingjing Wang, Wei Xu, Lv Shi, Jiaojiao Lu, Juan Tang, Jingjing Liu, Xiong Su
The highly glycosylated bone sialoprotein (BSP) is an abundant non-collagenous phosphoprotein in bone which enhances osteoblast differentiation and new bone deposition in vitro and in vivo. However, the structural details of its different glycosylation linkages have not been well studied and their functions in bone homeostasis are not clear. Previous studies suggested that the O-glycans, but not the N-glycans on BSP, are highly sialylated. Herein, we employed tandem mass spectrometry (MS/MS) to demonstrate that the N-glycanson the recombinant human integrin binding sialoprotein (rhiBSP) are also enriched in sialic acids (SAs) at their termini...
September 25, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28955691/gestational-diabetes-mellitus-fetal-growth-and-vitamin-d
#19
REVIEW
Hyun Koo Yoon
Vitamin D is an important secosteroid hormone in skeletal and non-skeletal systems. Vitamin D has relevance to muscle and immune function, hypertension, diabetes mellitus, cancer, and pregnancy because vitamin D receptors (VDR) are present in many non-skeletal tissues. Vitamin D acts on target tissues via the binding of its active form to VDR. As vitamin D affects not only bone metabolism but also glucose metabolism, vitamin D deficiency may affect the development of gestational diabetes mellitus and fetal growth...
August 2017: Journal of Bone Metabolism
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
#20
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
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