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Vitamine D3

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https://www.readbyqxmd.com/read/28742409/the-effects-of-vitamin-d-and-evening-primrose-oil-co-supplementation-on-lipid-profiles-and-biomarkers-of-oxidative-stress-in-vitamin-d-deficient-women-with-polycystic-ovary-syndrome-a-randomized-double-blind-placebo-controlled-trial
#1
Khadijeh Nasri, Sedighe Akrami, Maryam Rahimi, Mohsen Taghizadeh, Masoud Behfar, Mohammad Reza Mazandaranian, Abbas Kheiry, Mohammad Reza Memarzadeh, Zatollah Asemi
PURPOSE OF THE STUDY: There was inconsistent evidence about the benefit of vitamin D plus evening primrose oil (EPO) supplement intake on lipid profiles and reduced oxidative stress among women with polycystic ovary syndrome (PCOS). The current study was performed to evaluate the effects of vitamin D plus EPO supplementation on lipid profiles and biomarkers of oxidative stress in vitamin D-deficient women with PCOS. MATERIALS AND METHODS: This randomized, double-blind, placebo-controlled trial was performed among 60 vitamin D-deficient women with PCOS...
July 25, 2017: Endocrine Research
https://www.readbyqxmd.com/read/28742387/vitamin-d-loaded-nanostructured-lipid-carrier-nlc-a-new-strategy-for-enhancing-efficacy-of-doxorubicin-in-breast-cancer-treatment
#2
Mehdi Sabzichi, Jamal Mohammadian, Maryam Mohammadi, Farhad Jahanfar, Ali Akbar Movassagh Pour, Hamed Hamishehkar, Alireza Ostad-Rahimi
The dangerous dose-dependent side effects of anticancer agents triggered the finding of new approaches for elevated chemotherapy efficacy. This study investigated the potential application of nanostructured lipid careers (NLCs) in increasing vitamin D3 (VitD) effectiveness in breast cancer cell (MCF-7) in concurrent administration with doxorubicin (Dox). VitD-loaded NLCs were characterized by particle size, zeta potential, Fourier transform infrared spectroscopy, and scanning electron microscope. Cytotoxicity and molecular effects of formulation were evaluated by MTT, DAPI staining, flow cytometry, and real-time quantitative PCR assays...
July 25, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28740392/cholecalciferol-improves-glycemic-control-in-type-2-diabetic-patients-a-6-month-prospective-interventional-study
#3
Aml Mohamed Nada, Dalia A Shaheen
BACKGROUND AND PURPOSE: To investigate the effects of vitamin D supplementation on glucose homeostasis and lipid profile in type 2 diabetic patients who have vitamin D deficiency. PATIENTS AND METHODS: One hundred twenty-five type 2 diabetic patients taking oral hypoglycemic agents as mono- or combination therapy were recruited from the diabetes and endocrinology clinic. Subject demographics, duration of diabetes, antidiabetic medication, body mass index (BMI), pulse, and blood pressure (BP) were assessed...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/28737765/adrenocorticotropic-hormone-and-1-25-dihydroxyvitamin-d3-enhance-human-osteogenesis-in-vitro-by-synergistically-accelerating-the-expression-of-bone-specific-genes
#4
Irina L Tourkova, Li Liu, Nareerat Sutjarit, Quitterie C Larrouture, Jianhua Luo, Lisa J Robinson, Harry C Blair
To improve definition of the physical and hormonal support of bone formation, we studied differentiation of human osteoblasts in vitro at varying combinations of ACTH, 1α,25-dihydroxyvitamin D3 (1,25(OH)2D), and extracellular calcium, with and without added cortisol. Bone mineralization, alkaline phosphatase activity, and osteoblast-specific markers RunX2, osterix, and collagen I increased with 10 pM ACTH, 10 nM 1,25(OH)2D, or at 2 mM calcium with important synergistic activity of combinations of any of these stimuli...
July 24, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28736560/nonparallel-progression-of-left-ventricular-structure-and-function-in-long-term-peritoneal-dialysis-patients
#5
Qiuhong Shi, Jing Zhu, Sheng Feng, Huaying Shen, Jianchang Chen, Kai Song
BACKGROUND/AIMS: Left ventricular hypertrophy and dysfunction are key cardiovascular risk factors of patients on peritoneal dialysis (PD). The purpose of this study was to investigate the dynamic changes of left ventricular (LV) structure and function in patients on long-term PD. METHODS: Patients who underwent PD catheter insertions from January 2010 to December 2012 in our PD center were enrolled into this study. Cardiac structure and function of those patients were determined by echocardiography (4 times) at 12-month intervals...
June 2017: Cardiorenal Medicine
https://www.readbyqxmd.com/read/28736298/calcitriol-mediated-reduction-in-ifn-%C3%AE-output-in-t-cell-large-granular-lymphocytic-leukemia-requires-vitamin-d-receptor-upregulation
#6
M Paige Kulling, C Kristine Olson, L Thomas Olson, E Cait Hamele, N Kathryn Carter, J David Feith, P Thomas Loughran
Constitutively activated STAT1 and elevated IFN-γ are both characteristic of T cell large granular lymphocytic leukemia (T-LGLL), a rare incurable leukemia with clonal expansion of cytotoxic T cells due to defective apoptosis. Interferon gamma (IFN-γ) is an inflammatory cytokine that correlates with worse progression and symptomology in multiple autoimmune diseases and cancers. In canonical IFN-γ-STAT1 signaling, IFN-γ activates STAT1, a transcription factor, via phosphorylation of tyrosine residue 701 (p-STAT1)...
July 20, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28732680/stereoselective-synthesis-of-25s-26-dihydroxyvitamin-d3
#7
Rita Sigüeiro, Patricia González-Berdullas, Julian Loureiro, Antonio Mouriño, Miguel A Maestro
A convergent approach to 25S,26-dihydroxyvitamin D3 (1) has been developed in our laboratories. The A-ring and the CD-fragment are constructed from ergocalciferol and Inhoffen-Lythgoe diol, respectively. The triene system is assembled by a Wittig-Horner coupling. With this convergent synthesis, a novel hydroxylated vitamin D metabolite in our laboratory is available for biological testing.
July 18, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28731372/exploring-the-effect-of-vitamin-d3-supplementation-on-the-anti-ebv-antibody-response-in-relapsing-remitting-multiple-sclerosis
#8
Linda Rolf, Anne-Hilde Muris, Amandine Mathias, Renaud Du Pasquier, Inga Koneczny, Giulio Disanto, Jens Kuhle, Sreeram Ramagopalan, Jan Damoiseaux, Joost Smolders, Raymond Hupperts
BACKGROUND: Epstein-Barr virus (EBV) infection and vitamin D insufficiency are potentially interacting risk factors for multiple sclerosis (MS). OBJECTIVES: To investigate the effect of high-dose vitamin D3 supplements on antibody levels against the EBV nuclear antigen-1 (EBNA-1) in patients with relapsing-remitting multiple sclerosis (RRMS) and to explore any underlying mechanism affecting anti-EBNA-1 antibody levels. METHODS: This study utilized blood samples from a randomized controlled trial in RRMS patients receiving either vitamin D3 (14,000 IU/day; n = 30) or placebo ( n = 23) over 48 weeks...
July 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28729308/the-effect-of-combined-resistance-exercise-training-and-vitamin-d3-supplementation-on-musculoskeletal-health-and-function-in-older-adults-a-systematic-review-and-meta-analysis
#9
Anneka Elizabeth Antoniak, Carolyn A Greig
OBJECTIVES: In older adults, there is a blunted responsiveness to resistance training and reduced muscle hypertrophy compared with younger adults. There is evidence that both exercise training and vitamin D supplementation may benefit musculoskeletal health in older adults, and it is plausible that in combination their effects may be additive. The aim of this systematic review was to evaluate the effectiveness of combined resistance exercise training and vitamin D3 supplementation on musculoskeletal health in older adults...
July 20, 2017: BMJ Open
https://www.readbyqxmd.com/read/28729125/comparative-effects-of-vitamin-d-and-methylprednisolone-against-ischemia-reperfusion-injury-of-rabbit-spinal-cords
#10
Bora Gürer, Abdullah Karakoç, Pınar Kuru Bektaşoğlu, Hayri Kertmen, Mehmet Ali Kanat, Ata Türker Arıkök, Berrin İmge Ergüder, Mustafa Fevzi Sargon, Özden Çağlar Öztürk, Erhan Çelikoğlu
INTRODUCTION: Recent studies have demonstrated the neuroprotective and immunomodulatory effects of 1,25-dihydroxyvitamin D3 (calcitriol), but no previous study has examined these effects on spinal cord ischemia/reperfusion (I/R) injury. Therefore, the present study aimed to evaluate whether calcitriol protects the spinal cord from I/R injury. METHODS: Rabbits were randomized into four groups of eight animals: group 1 (laparotomy control), group 2 (ischemia control), group 3 (30mg/kg intraperitoneal methylprednisolone at surgery), and group 4 (0...
July 17, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28725977/the-effect-of-vitamin-d-and-calcium-supplementation-in-pediatric-steroid-sensitive-nephrotic-syndrome
#11
Sushmita Banerjee, Surupa Basu, Ananda Sen, Jayati Sengupta
BACKGROUND: Low serum levels of total 25-hydroxycholecalciferol (25(OH)D) occur in nephrotic syndrome (NS). We aimed to assess the effects of vitamin D3 and calcium supplementation on 25(OH)D levels, bone mineralization, and NS relapse rate in children with steroid-sensitive NS. METHODS: A randomized controlled trial (RCT) was performed in children with steroid-sensitive NS. The treatment group received vitamin D3 (60,000 IU orally, weekly for 4 weeks) and calcium supplements (500 to 1,000 mg/day for 3 months) after achieving NS remission...
July 19, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28718008/the-effect-of-vitamin%C3%A2-d-and-calcium-supplementation-on-falls-in-older-adults-a%C3%A2-systematic-review-and-meta-analysis
#12
Haiting Wu, Qingjiang Pang
OBJECTIVES: A number of studies have hypothesized that vitamin D is a potential factor in the prevention of falls in the elderly; however, the effect of vitamin D is still inconsistent and not quantitative. We conducted this meta-analysis to assess the effect of vitamin D on falls among elderly individuals. METHODS: The PubMed and Cochrane Library databases were searched from the earliest possible year up to December 2016. Two authors working independently reviewed the trials, and odds ratios (ORs) were calculated using a fixed-effect or random-effect model by Review Manager 5...
July 17, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28718005/sunscreens-block-cutaneous-vitamin-d-production-with-only-a-minimal-effect-on-circulating-25-hydroxyvitamin-d
#13
Florence Libon, Justine Courtois, Caroline Le Goff, Pierre Lukas, Neus Fabregat-Cabello, Laurence Seidel, Etienne Cavalier, Arjen F Nikkels
A 50+ SPF sunscreen decreased significantly cutaneous vitamin D production following a single narrow-band (nb)UVB exposure, independently from the body surface area exposed. In contrast, the circulating 25(OH)D3 levels were only minimally affected. It is probable that another endogenous source of precursors is selected when skin-originated precursors are lacking. PURPOSE: Sunscreen use, highly advocated for preventing cutaneous carcinogenesis, is potentially leading to an aggravation of vitamin D deficiency with its consequences on bone health...
December 2017: Archives of Osteoporosis
https://www.readbyqxmd.com/read/28716761/recent-developments-for-introducing-a-hexafluoroisopropanol-unit-into-the-vitamin-d-side-chain
#14
REVIEW
Fumihiro Kawagoe, Toru Sugiyama, Motonari Uesugi, Atsushi Kittaka
Among numerous studies on synthetic approaches to and the biological activities of vitamin D analogues, we herein focused on falecalcitriol, an analogue of calcitriol (1α,25-dihydroxyvitamin D3), in which a 26,26,26,27,27,27-hexafluoroisopropanol unit has been introduced into the side chain. Falecalcitriol was designed to escape from the metabolism of CYP24A1 and has been used as a drug to treat secondary hypoparathyroidism since 2001. Its metabolite, the 23-hydroxy form, retains biological activity and resistants to further metabolism...
July 14, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28716760/properties-of-purified-cyp2r1-in-a-reconstituted-membrane-environment-and-its-25-hydroxylation-of-20-hydroxyvitamin-d3
#15
Chloe Y S Cheng, Tae-Kang Kim, Saowanee Jeayeng, Andrzej T Slominski, Robert C Tuckey
Recent studies indicate that CYP2R1 is the major 25-hydroxylase catalyzing the first step in vitamin D activation. Since the catalytic properties of CYP2R1 have been poorly studied to date and it is a membrane protein, we examined the purified enzyme in a membrane environment. CYP2R1 was expressed in E. coli and purified by nickel affinity- and hydrophobic interaction-chromatography and assayed in a reconstituted membrane system comprising phospholipid vesicles plus purified human NADPH-P450 oxidoreductase...
July 14, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28710602/eldecalcitol-ed-71-an-analog-of-1%C3%AE-25-oh-2d3-inhibits-the-growth-of-squamous-cell-carcinoma-scc-cells-in-vitro-and-in-vivo-by-down-regulating-expression-of-heparin-binding-protein-17-fibroblast-growth-factor-binding-protein-1-hbp17-fgfbp-1-and-fgf-2
#16
T Shintani, F Takatsu, S N Z Rosli, E Usui, A Hamada, K Sumi, Y Hayashido, S Toratani, Tetsuji Okamoto
Heparin-binding protein 17 (HBp17)/fibroblast growth factor-binding protein-1 (FGFBP-1) was first purified from medium conditioned by A431 cells for its capacity to bind to fibroblast growth factors 1 and 2 (FGF-1 and -2). Among FGF family members, FGF-2 is a potent mitogen for various cell types, including vascular endothelial cells, fibroblasts, and cancer cells such as oral squamous cell carcinoma (OSCC) cells. Besides being well known in bone metabolism, the active form of vitamin D3, i.e., 1α,25(OH)2D3 (1,25D3), was reported to have protective effects for heart disease and cancer...
July 14, 2017: In Vitro Cellular & Developmental Biology. Animal
https://www.readbyqxmd.com/read/28707894/vitamin-d-receptor-regulates-amyloid-beta-1-42-production-with-protein-disulfide-isomerase-a3
#17
Duygu Gezen-Ak, Irem L Atasoy, Esin Candas, Merve Alaylioglu, Selma Yilmazer, Erdinc Dursun
The challenge of understanding the biology of neuronal amyloid processing could provide a basis for understanding the amyloid pathology in Alzheimer's disease (AD). Based on our previous studies we have suggested that AD might be the consequence of a hormonal imbalance in which the critical hormone is vitamin D. The present study primarily focused on the creation of a condition that prevents the genomic or non-genomic action of vitamin D by disrupting vitamin D receptors (VDR or PDIA3/1,25MARRS); the effects of these disruptions on the series of proteins involved in secretases that play a crucial role in amyloid pathology and on amyloid beta (Aβ) production in primary cortical neurons were observed...
July 14, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28702935/vitamin-d3-attenuates-cognitive-deficits-and-neuroinflammatory-responses-in-icv-stz-induced-sporadic-alzheimer-s-disease
#18
P Yamini, R S Ray, Kanwaljit Chopra
Alzheimer's disease (AD) is a progressive neurodegenerative disorder characterized by intracellular neurofibrillary tangles and extracellular Aβ deposition. Growing experimental evidence indicate diverse biological effects of vitamin D3 including antioxidant, neuroprotective, anti-inflammatory and cardiovascular benefits. However, the underlying neuroprotective mechanism of vitamin D3 is still largely elusive. Therefore, the present study was aimed to investigate the neuroprotective effects of vitamin D3 on ICV-STZ induced sporadic AD...
July 12, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28698476/acute-supplementation-with-high-dose-vitamin-d3-increases-serum-anti-m%C3%A3-llerian-hormone-in-young-women
#19
Nicola A Dennis, Lisa A Houghton, Michael W Pankhurst, Michelle J Harper, Ian S McLennan
Anti-Müllerian hormone (AMH) is a paracrine regulator of ovarian follicles. Vitamin D (Vit D) regulates AMH production in vitro, but its role as a regulator of ovarian AMH production is contentious. If Vit D influences ovarian AMH production, then an acute rise in Vit D level should lead to an acute rise in circulating AMH levels. This hypothesis was tested with a randomized double-blind design, with 18-25-year-old women recruited from the community. The study was conducted in early spring, when the marker of Vit D level (25-hydroxyvitamin D, 25(OH)D) tends to be at its nadir...
July 8, 2017: Nutrients
https://www.readbyqxmd.com/read/28697996/s-25-hydroxyvitamin-d-and-c3-epimers-in-pregnancy-and-infancy-an-odense-child-cohort-study
#20
Nanne Dreier Mydtskov, Sine Lykkedegn, Palle Back Nielsen Fruekilde, Jan Nielsen, Torben Barington, Henrik Thybo Christesen
BACKGROUND: Analysis of serum 25-hydroxyvitamin D (s-25(OH)D) may be complicated by the less active or in-active vitamin D metabolite C3-epi-25(OH)D3 (C3-epimer). We aimed to explore the relationship between s-C3-epimer and s-25(OH)D and other determinants and describe the longitudinal course of the C3-epimer fraction in paired mother-child samples. METHOD: S-25(OH)D and s-C3-epimer were estimated by liquid chromatography mass spectrometry in 290 mother-infant pairs from the population-based Odense Child Cohort...
July 8, 2017: Clinical Biochemistry
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