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https://www.readbyqxmd.com/read/28622535/vitamin-d-mediates-the-relationship-between-placental-cathelicidin-and-group-b-streptococcus-colonization-during-pregnancy
#1
Christine C Akoh, Eva K Pressman, Corrie M Whisner, Carrie Thomas, Chang Cao, Tera Kent, Elizabeth Cooper, Kimberly O O'Brien
Vitamin D is thought to modulate innate immune responses, and recent studies have highlighted the autocrine and paracrine functions of vitamin D in the placenta. Our objective was to determine the relationship between maternal vitamin D status and placental antimicrobial peptide (AMP) expression in a group of racially and ethnically diverse pregnant adolescents. In this study, 158 pregnant adolescents were recruited from the Rochester Adolescent Maternity Program (RAMP) in Rochester, NY. Maternal serum concentrations of the vitamin D biomarkers, 25-hydroxyvitamin D (25(OH)D) and 1,25-dihydroxyvitamin D (1,25(OH)2D), were measured at mid-gestation (∼26 weeks) and at delivery...
June 6, 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/28619151/effects-of-vitamin-d-and-its-metabolites-on-cell-viability-and-staphylococcus-aureus-invasion-into-bovine-mammary-epithelial-cells
#2
Yuan Yue, Lone Hymøller, Søren K Jensen, Charlotte Lauridsen, Stig Purup
Vitamin D has been found have various biological effects that may be potent in preventing bovine mastitis. Two forms of vitamin D, vitamin D2 (D2) and vitamin D3 (D3), can be hydroxylated to functional metabolites in cattle. The objectives of the present study were to investigate the potential of vitamin D compounds for controlling bovine mastitis using in vitro cell models, and to compare the differences between D2 and D3 compounds. Results showed that D2 compounds have comparable effects to their D3 analogues on inhibiting MAC-T cell viability in vitro...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28594304/role-of-vitamin-d-pathway-gene-polymorphisms-on-rifampicin-plasma-and-intracellular-pharmacokinetics
#3
Sarah Allegra, Giovanna Fatiguso, Andrea Calcagno, Lorena Baietto, Ilaria Motta, Fabio Favata, Jessica Cusato, Stefano Bonora, Giovanni Di Perri, Antonio D'Avolio
AIM: We retrospectively evaluate the pharmacogenetic role of single nucleotide polymorphisms involved in rifampicin transport (SLCO1B1, MDR1 and PXR genes) and vitamin D (VDR, CYP24A1 and CYP27B1 genes) metabolism and activity on drug plasma and intracellular concentrations. PATIENTS & METHODS: Rifampicin Cmax and Ctrough were measured at weeks 2 and 4 using Ultra-Performance Liquid Chromatography-tandem mass spectroscopy methods. Allelic discrimination was performed by real-time polymerase chain reaction...
June 8, 2017: Pharmacogenomics
https://www.readbyqxmd.com/read/28592202/pharmacogenetics-and-aromatase-inhibitor-induced-side-effects-in-breast-cancer-patients
#4
Valentina Sini, Andrea Botticelli, Gianluigi Lunardi, Stefania Gori, Paolo Marchetti
This paper reviews genetic variations mainly related to the onset of adverse events during aromatase inhibitors in early breast cancer. Genetic variability could occur at different steps. The analysis included studies that involved breast cancer patients, treated with an aromatase inhibitor, genotyped for CYP19A1 and/or CYP17A1 and/or CYP27B1 and/or TCLA1, and/or RANK/RANKL/OPG and/or ESR1/ESR2, and assessed for toxicity profile. Twenty-two articles were included for the analysis. Three studies evaluated outcomes and adverse events; 19 studies assessed only side effects...
June 8, 2017: Pharmacogenomics
https://www.readbyqxmd.com/read/28590769/associations-of-genetic-polymorphisms-relevant-to-metabolic-pathway-of-vitamin-d3-with-development-and-prognosis-of-childhood-bronchial-asthma
#5
Ying Zhang, Zhansheng Wang, Tongshuai Ma
This study was aimed at investigating the correlation between genetic polymorphisms relevant to metabolic pathway of vitamin D3 (VD3) and susceptibility to childhood bronchial asthma. Altogether 143 childhood patients with bronchial asthma and 143 healthy children of Chinese Han ethnicity were enrolled in this study. The key single-nucleotide polymorphisms (SNPs) were identified by HaploView 4.2 software and selected from previous investigations. Genomic DNAs were isolated from peripheral blood samples by using TaqMan Blood DNA kits...
June 7, 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/28589382/vitamin-d-receptor-and-progesterone-receptor-protein-and-gene-expression-in-papillary-thyroid-carcinomas-associations-with-histological-features
#6
M P Yavropoulou, G Panagiotou, K Topouridou, G Karayannopoulou, T Koletsa, T Zarampoukas, A Goropoulos, E Chatzaki, J G Yovos, K Pazaitou-Panayiotou
PURPOSE: Vitamin D receptor (VDR) and progesterone receptor (PR) expression has been described in papillary thyroid carcinoma (PTC) but data regarding association with tumor histological characteristics and localization of the protein expression are scarce. MATERIALS AND METHODS: Formalin-fixed, paraffin-embedded specimens from 45 patients with PTC (cases) were retrieved and tumor histological data were recorded. We analyzed gene and protein expression of VDR and PR and gene expression of vitamin D-inactivating 24-hyroxylase (CYP24A1) and the activating 1-alpha-hydroxylase (CYP27B1) enzymes in follicular cancer cells and the adjacent non-neoplastic thyroid tissue (NNTT)...
June 6, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28587998/clinical-and-genetic-analysis-of-two-chinese-families-with-vitamin-d-dependent-rickets-type-ia-and-follow-up
#7
Chen Ruimin, Li Yunfei, Yuan Xin, Lin Xiangquan, Yang Xiaohong, Zhang Ying
OBJECTIVE: Vitamin D-dependent rickets type IA (VDDR-IA) is a rare autosomal recessive disorder characterized by the early onset of severe rickets. The objectives of this study were twofold: 1) to analyze the clinical characteristics and therapy of two patients with VDDR-IA from two separate Chinese family, and 2) investigate the CYP27B1 gene in two large pedigrees. METHODS: Medical history, clinical manifestations, physical examination, radiological findings and laboratory data were analyzed from two patients with VDDR-IA...
June 7, 2017: Journal of Clinical Research in Pediatric Endocrinology
https://www.readbyqxmd.com/read/28579119/function-of-the-vitamin-d-endocrine-system-in-mammary-gland-and-breast-cancer
#8
REVIEW
JoEllen Welsh
The nuclear receptor for 1α,25-dihydroxycholecalciferol (1,25D), the active form of vitamin D, has anti-tumor actions in many tissues. The vitamin D receptor (VDR) is expressed in normal mammary gland and in many human breast cancers suggesting it may represent an important tumor suppressor gene in this tissue. When activated by 1,25D, VDR modulates multiple cellular pathways including those related to energy metabolism, terminal differentiation and inflammation. There is compelling pre-clinical evidence that alterations in vitamin D status affect breast cancer development and progression, while clinical and epidemiological data are suggestive but not entirely consistent...
June 1, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28548312/vitamin-d-dependent-rickets-type-1b-25-hydroxylase-deficiency-a-rare-condition-or-a-misdiagnosed-condition
#9
Molin A, Wiedemann A, Demers N, Kaufmann M, Do Cao J, Mainard L, Dousset B, Journeau P, Abeguile G, Coudray N, Mittre H, Richard N, Weryha G, Sorlin A, Jones G, Kottler Ml, Feillet F
Vitamin D requires a two-step activation by hydroxylation: the first step is catalyzed by hepatic 25-hydroxylase (CYP2R1, 11p15.2), and the second one is catalyzed by renal 1α-hydroxylase (CYP27B1, 12q13.1), which produces the active hormonal form of 1,25-(OH)2 D. Mutations of CYP2R1 have been associated with Vitamin D-dependent rickets type 1B (VDDR1B), a very rare condition that has only been reported to affect 4 families to date. We describe 7 patients from two unrelated families who presented with homozygous loss-of-function mutations of CYP2R1...
May 26, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28526240/endocrine-actions-of-vitamin-d-in-skin-relevance-for-photocarcinogenesis-of-non-melanoma-skin-cancer-and-beyond
#10
REVIEW
Jörg Reichrath, Roman Saternus, Thomas Vogt
The skin represents a pivotal organ for the human body's vitamin D endocrine system, being both the site of ultraviolet (UV)-B-induced vitamin D synthesis and a target tissue for the pluripotent effects of 1,25(OH)2D3 and other biologically active vitamin D metabolites. As many other steroid hormones, 1,25(OH)2D3 exerts its effects via two independent signal transduction pathways: the classical genomic and the non-genomic pathway. While non-genomic effects of 1,25(OH)2D3 are in part exerted via effects on intracellular calcium, genomic effects are mediated by the vitamin D receptor (VDR)...
May 16, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28453395/association-of-vitamin-d-pathway-snps-and-clinical-response-to-interferon-in-a-cohort-of-hbeag-negative-patients
#11
Jessica Cusato, Lucio Boglione, Amedeo De Nicolò, Rosaria Imbornone, Chiara Simona Cardellino, Valeria Ghisetti, Chiara Carcieri, Giuseppe Cariti, Giovanni Di Perri, Antonio D'Avolio
AIM: Vitamin D modulates biological processes; an influence of vitamin D levels and genetic variants was identified concerning hepatitis B virus infection. We evaluated the role of some SNPs of vitamin D pathway genes in some clinical features of hepatitis B affected patients treated with pegylated interferon. METHODS: We investigated SNPs in IL-28B, CYP27B1, CYP27A1, CYP24A1, VDBP and VDR genes, through real-time PCR. RESULTS:  VDRApaI SNP was associated to viral load and HBsAg presence at different timings...
April 28, 2017: Pharmacogenomics
https://www.readbyqxmd.com/read/28430709/vitamin-d3-repressed-astrocyte-activation-following-lipopolysaccharide-stimulation-in-vitro-and-in-neonatal-rats
#12
Ke-Ping Jiao, Shao-Min Li, Wen-Yan Lv, Ming-Liang Jv, Hai-Yan He
Vitamin D3 has been reported to be an immunity modulator and high levels of vitamin D3 are correlated with a decreased risk for developing diseases in the central nervous system. Astrocytes are important immune cells and contribute toward inflammation during neurological diseases. The vitamin D receptor has been reported to be expressed in astrocytes; however, the effect of vitamin D3 on astrocyte activation has not been studied. Here, we found that lipopolysaccharide stimulation in astrocytes could enhance the expression of vitamin D receptor and Cyp27B1, which encodes the enzyme for converting vitamin D3 into its active form...
April 20, 2017: Neuroreport
https://www.readbyqxmd.com/read/28425954/inherited-variation-in-vitamin-d-genes-and-type-1-diabetes-predisposition
#13
REVIEW
Marissa Penna-Martinez, Klaus Badenhoop
The etiology and pathophysiology of type 1 diabetes remain largely elusive with no established concepts for a causal therapy. Efforts to clarify genetic susceptibility and screening for environmental factors have identified the vitamin D system as a contributory pathway that is potentially correctable. This review aims at compiling all genetic studies addressing the vitamin D system in type 1 diabetes. Herein, association studies with case control cohorts are presented as well as family investigations with transmission tests, meta-analyses and intervention trials...
April 20, 2017: Genes
https://www.readbyqxmd.com/read/28415985/vitamin-d-related-gene-polymorphism-predict-treatment-response-to-pegylated-interferon-based-therapy-in-thai-chronic-hepatitis-c-patients
#14
Kessarin Thanapirom, Sirinporn Suksawatamnuay, Wattana Sukeepaisarnjaroen, Pisit Tangkijvanich, Sombat Treeprasertsuk, Panarat Thaimai, Rujipat Wasitthankasem, Yong Poovorawan, Piyawat Komolmit
BACKGROUND: Patients with chronic hepatitis C (HCV) infection have high prevalence of vitamin D deficiency. Genome-wide association study data has showed that several genetic variants within vitamin D cascade affect vitamin D function. This study aimed to determine whether genetic polymorphisms of genes in the vitamin D pathway are associated with treatment responses to pegylated interferon (PEG-IFN)-based therapy in patients with chronic HCV infection. METHODS: The study included 623 Thai patients from 2 university hospitals diagnosed with chronic HCV infection who were treated with a PEG-IFN and ribavirin...
April 17, 2017: BMC Gastroenterology
https://www.readbyqxmd.com/read/28403520/study-of-gene-expression-alteration-in-male-androgenetic-alopecia-evidence-of-predominant-molecular-signaling-pathways
#15
L Michel, P Reygagne, P Benech, F Jean-Louis, S Scalvino, S Ly Ka So, Z Hamidou, S Bianovici, J Pouch, B Ducos, M Bonnet, A Bensussan, A Patatian, E Lati, J Wdzieczak-Bakala, J-C Choulot, E Loing, M Hocquaux
BACKGROUND: Male androgenetic alopecia (AGA) is the most common form of hair loss in men and is characterized by a distinct pattern of progressive hair loss starting from the frontal area and the vertex of the scalp. Although several genetic risk loci have been identified, relevant genes for AGA remain to be defined. OBJECTIVES: Herein, molecular biomarkers associated with premature AGA were identified through gene expression analysis using cDNA generated from scalp vertex biopsies of hairless/bald men with premature AGA and healthy volunteers...
April 12, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28362172/vitamin-d-signaling-pathways-confer-the-susceptibility-of-esophageal-squamous-cell-carcinoma-in-a-northern-chinese-population
#16
Jianzhou Yang, Haili Wang, Aifang Ji, Liang Ma, Jinsheng Wang, Changhong Lian, Zibai Wei, Lidong Wang
Experimental studies have determined the chemopreventive effects of vitamin D against the esophageal squamous cell carcinoma (ESCC); however, results from the epidemiological studies are not yet well established. The current study aimed to evaluate the associations between plasma vitamin D levels and variants on vitamin D metabolic-related genes with the risks for ESCC. A hospital-based case-control study was performed. Five hundred eighty-two ESCC patients and 569 controls were recruited in a Northern Chinese population...
March 31, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28327211/reduced-fetal-vitamin-d-status-by-maternal-undernutrition-during-discrete-gestational-windows-in-sheep
#17
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...
June 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
#18
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
#19
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
#20
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
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