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Vitamin d binding protein

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https://www.readbyqxmd.com/read/28812264/oxytocin-and-steroid-actions
#1
Gustav F Jirikowski, Scott D Ochs, Jack D Caldwell
Biosynthesis and secretion of the hypothalamic nonapeptide oxytocin largely depends on steroid hormones. Estradiol, corticosterone, and vitamin D seem to be the most prominent actors. Due to their lipophilic nature, systemic steroids are thought to be capable of crossing the blood-brain barrier, thus mediating central functions including neuroendocrine and behavioral control. The actual mode of action of steroids in hypothalamic circuitry is still unknown: Most of the oxytocinergic perikarya lack nuclear steroid receptors but express proteins suspected to be membrane receptors for steroids...
August 16, 2017: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/28807113/circulating-vitamin-d-binding-protein-and-free-25-hydroxyvitamin-d-concentrations-in-patients-with-melanoma-a-case-control-study
#2
Cristián Navarrete-Dechent, Constanza Del Puerto, Montserrat Molgó, Sergio González, Guillermo Pérez-Mateluna, Pablo Uribe, Carlos A Camargo, Arturo Borzutzky
No abstract text is available yet for this article.
September 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28798036/why-don-t-serum-vitamin-d-concentrations-associate-with-bmd-by-dxa-a-case-of-being-bound-to-the-wrong-assay-implications-for-vitamin-d-screening
#3
Richard J Allison, Abdulaziz Farooq, Anissa Cherif, Bruce Hamilton, Graeme L Close, Mathew G Wilson
BACKGROUND: The association between bone mineral density (BMD) and serum25-hydroxyvitamin D (25(OH)D) concentration is weak, particularly in certain races (eg, BlackAfrican vs Caucasian) and in athletic populations. We aimed to examine if bioavailable vitamin D rather than serum 25(OH)D was related to markers of bone health within a racially diverse athletic population. METHODS: In 604 male athletes (Arab (n=327), Asian (n=48), Black(n=108), Caucasian (n=53)and Hispanic (n=68)), we measured total 25(OH)D, vitamin D-binding protein and BMD by DXA...
August 10, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28795044/n-glycoproteomic-analysis-of-human-follicular-fluid-during-natural-and-stimulated-cycles-in-patients-undergoing-in-vitro-fertilization
#4
Hee-Joung Lim, Ae Eun Seok, Jiyou Han, Jiyeong Lee, Sungeun Lee, Hee-Gyoo Kang, Byung Heun Cha, Yunseok Yang
OBJECTIVE: Hyperstimulation methods are broadly used for in vitro fertilization (IVF) in patients with infertility; however, the side effects associated with these therapies, such as ovarian hyperstimulation syndrome (OHSS), have not been well studied. N-glycoproteomes are subproteomes used for the remote sensing of ovarian stimulation in follicular growth. Glycoproteomic variation in human follicular fluid (hFF) has not been evaluated. In this study, we aimed to identify and quantify the glycoproteomes and N-glycoproteins (N-GPs) in natural and stimulated hFF using label-free nano-liquid chromatography/electrospray ionization-quad time-of-flight mass spectrometry...
June 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28779988/impact-of-polymorphism-rs7041-and-rs4588-of-vitamin-d-binding-protein-on-the-extent-of-coronary-artery-disease
#5
V Daffara, M Verdoia, R Rolla, M Nardin, P Marino, G Bellomo, A Carriero, G De Luca
BACKGROUND AND AIM: 25-hydroxyvitamin D deficiency represents a widespread social problem but also an emerging risk factor for cardiovascular disease. Genetic variants of the Vitamin D Binding Protein (VDBP), the main transporter of vitamin D in the bloodstream, have been shown to account for a significant variability in the levels and systemic effects of vitamin D. We investigated whether the single nucleotide polymorphisms, rs7041 and rs4588, of VDBP are associated to the prevalence and extent of coronary artery disease...
June 24, 2017: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/28765896/1-25-oh-2d3-treatment-attenuates-high-glucose%C3%A2-induced-peritoneal-epithelial-to-mesenchymal-transition-in-mice
#6
Lina Yang, Yi Fan, Xiuli Zhang, Wenyu Huang, Jianfei Ma
It has been previously demonstrated that 1,25(OH)2D3 prevents the progression of epithelial to mesenchymal transition (EMT). However, it remains unclear whether 1,25(OH)2D3 has a role in peritoneal EMT stimulated by high glucose (HG) peritoneal dialysis fluid (PDF). The present study was performed to investigate the role of 1,25(OH)2D3 in the progression of EMT in the peritoneal mesothelium. A total of 35 male Kunming mice were randomly assigned into seven groups. In the control group, no diasylate or saline was infused...
July 27, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28751284/search-for-biomarkers-of-neurosarcoidosis-by-proteomic-analysis-of-cerebrospinal-fluid
#7
Ludmia Taibi, Céline Boursier, Gilles Clodic, Gérard Bolbach, Bénédicte Bénéteau-Burnat, Michel Vaubourdolle, Bruno Baudin
Sarcoidosis is a systemic granulomatous disease, which mostly affects lung. Central nervous system can be affected causing a neurosarcoidosis in 5 to 15% of all sarcoidosis patients. The definitive diagnosis is established on histological examination of brain granulomas. Angiotensin converting enzyme is currently the most relevant biomarker to confirm a probable diagnosis; however, it lacks sensitivity and specificity. We aim to find novel biomarkers of neurosarcoidosis in cerebrospinal fluid (CSF) by proteomic analysis, combining two-dimension electrophoresis (2-DE) and mass spectrometry...
August 1, 2017: Annales de Biologie Clinique
https://www.readbyqxmd.com/read/28748874/variables-affecting-darbepoetin-resistance-index-in-hemodialysis-patients
#8
Fayez Hejaili, Ehtsham Hafeez, Burhan Bhutto, Lulwa Al Turki, Abdul Kareem Alsuwida, Hammad Raza, Abdulla Al-Sayyari
Erythropoietin resistance index calculation has been used as a tool to evaluate anemia response to erythropoietin therapy. Very little has been reported in its use when using darbepoetin and factors influencing in Arab patients. Darbepoetin resistance index (DRI) was calculated in all our patients using darbepoetin. This was correlated to demographic, clinical, and laboratory parameters. Of the 250 patients, 40.4% were diabetic, 71.1% on hemodialysis, and 28.6% on hemodiafiltration), 23.9% with PermCaths (PC), and 76...
July 2017: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/28738681/optimizing-high-resolution-mass-spectrometry-for-the-identification-of-low-abundance-post-translational-modifications-of-intact-proteins
#9
Lisa E Kilpatrick, Eric L Kilpatrick
Intact protein analysis by liquid chromatography-mass spectrometry (LC-MS) is now possible due to the improved capabilities of mass spectrometers yielding greater resolution, mass accuracy, and extended mass ranges. Concurrent measurement of post-translational modifications (PTMs) during LC-MS of intact proteins is advantageous while monitoring critical proteoform status, such as for clinical samples or during production of reference materials. However, difficulties exist for PTM identification when the protein is large or contains multiple modification sites...
August 8, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28734987/bioavailable-and-free-25-hydroxyvitamin-d-and-vitamin-d-binding-protein-in-polycystic-ovary-syndrome-relationships-with-obesity-and-insulin-resistance
#10
Negar Naderpoor, Soulmaz Shorakae, Sally K Abell, Aya Mousa, Anju E Joham, Lisa J Moran, Nigel K Stepto, Poli Mara Spritzer, Helena J Teede, Barbora de Courten
Polycystic ovary syndrome (PCOS) is a common condition characterised by both reproductive and metabolic features (obesity, insulin resistance, diabetes risk). Some evidence suggests that women with PCOS have lower vitamin D levels compared to healthy controls. Vitamin D binding protein (DBP) is the main carrier of vitamin D in circulation and plays an important role in regulating vitamin D concentration and bioavailability for target tissues. To our knowledge, no previous studies have examined DBP, bioavailable and free 25-hydroxyvitamin D (25(OH)D) in women with PCOS...
July 19, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28732681/diurnal-rhythms-of-vitamin-d-binding-protein-and-total-and-free-vitamin-d-metabolites
#11
Kerry S Jones, Jean Redmond, Anthony J Fulford, Landing Jarjou, Bo Zhou, Ann Prentice, Inez Schoenmakers
Vitamin D binding protein (DBP) concentration is known to influence the availability and bioactivity of vitamin D metabolites but its diurnal rhythm (DR), its inter-relationships with the DRs of vitamin D metabolites and its influence on free vitamin D metabolite concentrations are not well described. The DRs of plasma total 25(OH)D, total 1,25(OH)2D, DBP, albumin and calculated free 25(OH)D and free 1,25(OH)2D were measured in men and women aged 60-75 years and resident in the UK (n 30), Gambia (n 31) and China (n 30) with differences in lifestyle, dietary intake and vitamin D status...
September 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28732679/serum-25-hydroxyvitamin-d-concentrations-are-associated-with-nuclear-factor-kappa-b-activity-but-not-with-inflammatory-markers-in-healthy-normoglycemic-adults
#12
Aya Mousa, Maximilian P J de Courten, Josephine Forbes, Barbora de Courten
Vitamin D has been reported to have anti-inflammatory properties in in vitro and animal studies, which are thought to occur via inhibition of the nuclear factor kappa-B (NFκB) pathway. However, the association between vitamin D and in vivo NFκB activity in humans has not previously been reported. The aim of the present study was to examine the associations between circulating 25-hydroxyvitamin D (25(OH)D) concentrations and NFκB activity in peripheral blood mononuclear cells (PBMCs) as well as plasma inflammatory markers in healthy individuals...
July 18, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28721141/impact-of-25-hydroxyvitamin-d-free-and-bioavailable-fractions-of-vitamin-d-and-vitamin-d-binding-protein-levels-on-metabolic-syndrome-components
#13
Marta Pelczyńska, Teresa Grzelak, Marcelina Sperling, Paweł Bogdański, Danuta Pupek-Musialik, Krystyna Czyżewska
INTRODUCTION: Various forms of vitamin D and factors involved in their metabolism can play a role in the etiopathogenesis of metabolic disorders. This paper aims to define the relationship between concentration of the hydroxylated form of vitamin D (25(OH)D), the fraction of free and bioavailable vitamin D, and of vitamin D binding protein (VDBP) levels on the one hand and the prevalence of metabolic syndrome components on the other. MATERIAL AND METHODS: The studies were conducted on 79 people, including 52 with metabolic syndrome (MetS+) and 27 without it (MetS-)...
June 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28700733/non-invasive-prediction-of-preterm-birth-in-women-with-cervical-insufficiency-or-an-asymptomatic-short-cervix-%C3%A2-25-mm-by-measurement-of-biomarkers-in-the-cervicovaginal-fluid
#14
Ha-Na Yoo, Kyo Hoon Park, Eun Young Jung, Yu Mi Kim, Song Yi Kook, Se Jeong Jeon
OBJECTIVE: To determine whether various proteins in the cervicovaginal fluid (CVF) known to be involved in immune regulation, alone or in combination with clinical risk factors, can predict spontaneous preterm delivery (SPTD) in women with cervical insufficiency or a short cervix (≤25 mm). METHODS: This retrospective cohort study included 62 asymptomatic women with cervical insufficiency (n = 27) or an asymptomatic short cervix (n = 35) at 18-27 weeks. CVF swab samples were taken for assays of vitamin D binding protein (VDBP), interleukin (IL)-8, matrix metalloproteinases (MMP)-9, tissue inhibitor of metalloproteinases (TIMP)-1, and Dickkopf-related protein 3 (DKK3) before cervical examination, and maternal blood was collected for the determination of the C-reactive protein (CRP) level...
2017: PloS One
https://www.readbyqxmd.com/read/28698609/functional-analyses-of-a-novel-missense-and-other-mutations-of-the-vitamin-d-receptor-in-association-with-alopecia
#15
Mayuko Tamura, Michiyasu Ishizawa, Tsuyoshi Isojima, Samim Özen, Akira Oka, Makoto Makishima, Sachiko Kitanaka
Hereditary 1,25-dihydroxyvitamin D-resistant rickets (HVDRR) is a rare disorder, caused by bialellic mutations of the vitamin D receptor (VDR) gene, sometimes associated with alopecia. The aim of this study is to elucidate the mechanism of functional disruption of a novel mutation, detected in a patient with HVDRR, comparing to other mutations with or without alopecia. The patient was a 2-year-old girl with alopecia, who was clinically diagnosed as HVDRR. Genetic analysis revealed a novel homozygous mutation, S360P, located in ligand binding domain (LBD)...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28689994/rbp4-stra6-pathway-drives-cancer-stem-cell-maintenance-and-mediates-high-fat-diet-induced-colon-carcinogenesis
#16
Sheelarani Karunanithi, Liraz Levi, Jennifer DeVecchio, George Karagkounis, Ofer Reizes, Justin D Lathia, Matthew F Kalady, Noa Noy
The transmembrane protein, STRA6, functions as a vitamin A transporter and a cytokine receptor when activated by vitamin A-bound serum retinol binding protein 4 (RBP4). STRA6 activation transduces a JAK2-STAT3 signaling cascade and promotes tumorigenesis in a xenograft mouse model of colon cancer. We show here that RBP4 and STRA6 expression is associated with poor oncologic prognosis. Downregulating STRA6 or RBP4 in colon cancer cells decreased the fraction of cancer stem cells and their sphere and tumor initiation frequency...
August 8, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28680266/genome-wide-identification-and-comparative-analysis-of-albumin-family-in-vertebrates
#17
Shugang Li, Yiping Cao, Fang Geng
Albumins are the most well-known globular proteins, and the most typical representatives are the serum albumins. However, less attention was paid to the albumin family, except for the human and bovine serum albumin. To characterize the features of albumin family, we have mined all the putative albumin proteins from the available genome sequences. The results showed that albumin is widely distributed in vertebrates, but not present in the bacteria and archaea. The phylogenetic analysis of vertebrate albumin family implied an evolutionary relationship between members of serum albumin, α-fetoprotein, vitamin D-binding protein, and afamin...
2017: Evolutionary Bioinformatics Online
https://www.readbyqxmd.com/read/28676457/on-the-role-of-classical-and-novel-forms-of-vitamin-d-in-melanoma-progression-and-management
#18
REVIEW
Andrzej T Slominski, Anna A Brozyna, Cezary Skobowiat, Michal A Zmijewski, Tae-Kang Kim, Zorica Janjetovic, Allen S Oak, Wojciech Jozwicki, Anton M Jetten, Rebecca S Mason, Craig Elmets, We Li, Robert M Hoffman, Robert C Tuckey
Melanoma represents a significant clinical problem affecting a large segment of the population with a relatively high incidence and mortality rate. Ultraviolet radiation (UVR) is an important etiological factor in malignant transformation of melanocytes and melanoma development. UVB, while being a full carcinogen in melanomagenesis, is also necessary for the cutaneous production of vitamin D3 (D3). Calcitriol (1,25(OH)2D3) and novel CYP11A1-derived hydroxyderivatives of D3 show anti-melanoma activities and protective properties against damage induced by UVB...
July 1, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28673024/ancestry-adjusted-vitamin-d-metabolite-concentrations-in-association-with-cytochrome-3a-cyp3a-polymorphisms
#19
Robin Taylor Wilson, Loren D Masters, Jill S Barnholtz-Sloan, Anna C Salzberg, Terryl J Hartman
This study investigates the association between genetic polymorphisms in CYP2R1, CYP24A1 and the CYP3A family with non-summer plasma concentrations of 25(OH)D3 and proportion 24,25(OH)2D3 among healthy individuals of Sub-Saharan African and European ancestry matched on age (±5 years; n = 188 in each ancestral group) in central suburban Pennsylvania (2006-09). Vitamin D metabolites were measured using high-performance liquid chromatography/tandem mass spectrometry. Paired multiple regression and adjusted least square means analyses were used to test for associations between genotype and log-transformed metabolite concentrations, adjusted for age, sex, West African genetic ancestry proportion, body mass index, oral contraceptive (OC) use, tanning bed use, vitamin D intake, days from summer solstice, time of day, and isoforms of the vitamin D receptor (VDR) and vitamin D binding protein...
June 30, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28668468/standardization-of-automated-25-hydroxyvitamin-d-assays-how-successful-is-it
#20
E H A M Elsenberg, E Ten Boekel, H Huijgen, A C Heijboer
OBJECTIVES: Multiple 25(OH)D assays have recently been aligned to improve comparibility. In this study we investigated the performance of these assays using both native single-donor sera with target values certified by a reference method as well as single donor sera from a heterogeneous patient population. DESIGN & METHODS: 25(OH)D levels were measured in twenty reference samples (Ref!25OHD; Labquality, Finland) using five automated methods (Lumipulse, Liaison, Cobas, iSYS and Access) and one aligned ID-XLC-MS/MS method (slope: 1,00; intercept: 0,00; R=0,996)...
June 28, 2017: Clinical Biochemistry
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