keyword
MENU ▼
Read by QxMD icon Read
search

calcitriol

keyword
https://www.readbyqxmd.com/read/29160302/role-of-cyp24a1-vdr-and-gc-gene-polymorphisms-on-deferasirox-pharmacokinetics-and-clinical-outcomes
#1
S Allegra, J Cusato, S De Francia, A Arduino, F Longo, E Pirro, D Massano, A De Nicolò, A Piga, A D'Avolio
β-Thalassemia patients develop deficiency in vitamin D absorption and liver hydroxylation, resulting in extremely low calcitriol levels. We explored the role of single-nucleotide polymorphisms (SNPs) involved in vitamin D metabolism, transport and activity on deferasirox pharmacokinetics and outcomes (effectiveness trough levels (Ctrough) and the area under the curve (AUC) cutoffs of 20 μg ml(-1) and 360 μg ml(-1) h(-1), respectively; nonresponse AUC limit of 250 μg ml(-1) h(-1)). Ninety-nine β-thalassemic patients were enrolled...
November 21, 2017: Pharmacogenomics Journal
https://www.readbyqxmd.com/read/29156056/high-doses-of-cholecalciferol-alleviate-the-progression-of-hyperparathyroidism-in-patients-with-ckd-stages-3-4-results-of-a-12-week-double-blind-randomized-controlled-study
#2
Per-Anton Westerberg, Gunnar Sterner, Östen Ljunggren, Elin Isaksson, Fjölnir Elvarson, Hamid Dezfoolian, Torbjörn Linde
Background: Calcidiol insufficiency may accelerate the development of secondary hyperparathyroidism (SHPT). We tested the effect of a substantial increase in calcidiol on mineral metabolism in patients with chronic kidney disease (CKD). Methods: Ninety-five patients with CKD Stages 3-4, parathyroid hormone (PTH) above 6.8 pmol/L and calcidiol below 75 nmol/L were randomized to receive either cholecalciferol 8000 IU/day or placebo for 12 weeks. The primary endpoint was difference in the mean change in iPTH after 12 weeks...
May 30, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29149966/seasonal-variation-of-vitamin-d-status-in-long-term-kidney-transplant-recipients
#3
J Wilimborek, M Nowicki, I Kurnatowska
BACKGROUND: There is little information about circannual rhythm of vitamin D level in kidney transplantation (KTx) patients. MATERIAL AND METHODS: In 71 patients (27 females; 44 males) in the long term after KTx (5.5 ± 2.6 years) during the winter and summer months plasma concentration of 25-hydroxyvitamin D (25(OH)D), 1,25-hydroxyvitamin D, parathormone (PTH), fibroblast growth factor 23 (FGF-23), calcium, and phosphorus were assessed. Vitamin D status was classified according to 25(OH)D level (ie, insufficiency, ≤30 ng/mL; deficiency, <15 ng/mL)...
November 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/29145536/the-effects-of-vitamin-d-supplementation-in-newly-diagnosed-type-1-diabetes-patients-systematic-review-of-randomized-controlled-trials
#4
Elina Gregoriou, Ioannis Mamais, Irene Tzanetakou, Giagkos Lavranos, Stavri Chrysostomou
AIM: The aim of this study was to examine the effects of vitamin D supplementation in patients newly diagnosed with type 1 diabetes (T1D) assessed by insulin needs and changes in glycemic indices, as evidenced by randomized controlled trials (RCTs). METHODS: A total of 7 RCTs were retrieved from PubMed/Medline and EBSCO databases by MeSH term search, and were reviewed systematically. The RCTs included examined the effects of alphacalcidole (n = 2), cholecalciferol (n = 2), and calcitriol (n = 3) supplementation on changes in daily insulin dose (DID), fasting Cpeptide (FCP), stimulated C-peptide (SCP), and HbA1c...
July 2017: Review of Diabetic Studies: RDS
https://www.readbyqxmd.com/read/29138801/vitamin-d-receptor-activation-influences-the-erk-pathway-and-protects-against-neurological-deficits-and-neuronal-death
#5
Jie Yuan, Xin Guo, Zhengang Liu, Xiuqin Zhao, Yan Feng, Sixin Song, Changmeng Cui, Pei Jiang
Previous studies have demonstrated that global cerebral ischemia (GCI) causes neurological deficits and neuronal cell apoptosis. Calcitriol, a biologically active metabolite of vitamin D, exerts its endocrinological influence via nuclear vitamin D receptor. It is being assessed as an emerging therapeutic strategy in models of various medical conditions, including acute brain injury. The purpose of the present study was to investigate the neuroprotective effects of calcitriol on GCI and further refine the potential underlying mechanisms...
November 9, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29136400/changes-in-bone-turnover-and-calcium-homeostasis-during-pregnancy-and-lactation-in-mammals-a-meta-analysis
#6
Diego A Torres, Mariella B Freitas, Reggiani V Gonçalves
Large amounts of calcium are required during pregnancy and lactation to support fetal and neonatal bone growth and calcification. An inadequate supply of calcium during these stages can lead to unsuccessful reproduction or impaired offspring fitness. During reproduction, female mammals undergo numerous physiological changes, including adaptations to allow an adequate supply of calcium. The lack of quantitative studies analysing these physiological changes from a comparative perspective limits our ability to explain and understand these adaptations...
November 15, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/29128315/parathyroid-hormone-calcidiol-calcitriol-and-adverse-events-in-the-acute-coronary-syndrome
#7
P Ramos Ruiz, L Jaulent Huertas, M Castañeda Sancirilo, J J Martínez Díaz, G Clavel Ruipérez, L García de Guadiana Romualdo, S Wasniewski, M Merelo Nicolás, I García Escribano, F Soria Arcos, J A Castillo Moreno, L Consuegra Sánchez
OBJECTIVE: To know the clinical profile as well as the prognostic significance of elevated levels of parathyroid hormone (PTH) in patients admitted for acute coronary syndrome (ACS). DESIGN AND SETTING: Observational and prospective study of patients admitted for ACS in a single Spanish center during a period of six months. INTERVENTION AND VARIABLES OF INTEREST: The circulating concentrations of PTH, calcidiol, calcitriol, NT-proBNP, C-reactive protein, cystatinC and fibrinogen were determined within the first 48h at admission...
November 8, 2017: Medicina Intensiva
https://www.readbyqxmd.com/read/29115640/off%C3%A2-target-effect-of-imatinib-and-nilotinib-on-human-vitamin-d3-metabolism
#8
Lysann Kroschwald, Meinolf Suttorp, Josephine Tabea Tauer, Nick Zimmermann, Claudia Günther, Andrea Bauer
Prolonged treatment with tyrosine kinase inhibitors (TKI) including imatinib (IMA) or nilotinib (NIL), induces severe disturbances of bone metabolism in patients with chronic myeloid leukaemia. As vitamin D3 (VD3) is involved in the complex cycle of bone remodelling, the present study investigated in vitro, the influence of IMA and NIL on VD3 metabolism i) in HaCaT cells and ii) in cultured outer root sheath keratinocytes (ORS‑KC) from hair follicles of IMA treated children. Cells were incubated in the presence of IMA or NIL...
November 3, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29115583/unfavorable-effect-of-calcitriol-and-its-low-calcemic-analogs-on-metastasis-of-4t1-mouse-mammary-gland-cancer
#9
Artur Anisiewicz, Agata Pawlik, Beata Filip-Psurska, Eliza Turlej, Stanisław Dzimira, Magdalena Milczarek, Katarzyna Gdesz, Diana Papiernik, Joanna Jarosz, Dagmara Kłopotowska, Andrzej Kutner, Andrzej Mazur, Joanna Wietrzyk
Low vitamin D status is considered as a risk factor for breast cancer and has prognostic significance. Furthermore, vitamin D deficiency increases after adjuvant cancer therapy, which alters bone metabolism increasing the risk of osteoporosis. It is now postulated that vitamin D supplementation in breast cancer treatment delays the recurrence of cancer thereby extending survival. We evaluated the impact of calcitriol and its low-calcemic analogs, PRI‑2191 and PRI‑2205, on the tumor growth, angiogenesis, and metastasis of 4T1 mouse mammary gland cancer...
November 2, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/29115514/polygonum-multiflorm-alleviates-glucocorticoid%C3%A2-induced-osteoporosis-and-wnt-signaling-pathway
#10
Manru Zhou, Jingkai Wu, Yongjie Yu, Yajun Yang, Jin Li, Liao Cui, Weimin Yao, Yuyu Liu
It is known that long‑term excessive administration of glucocorticoid (GC) results in osteoporosis. The present study aimed to evaluate the protective effects of Polygonum multiflorm (PM) on the bone tissue of rats with GC‑induced osteoporosis (GIO). A total of 90 6‑month‑old female Sprague Dawley rats (weight range, 190‑210 g) were randomly divided into nine groups: Control (normal saline); prednisone (GC; 6 mg·kg‑1·d‑1; Model); GC plus PMR30 (the 30% ethanol eluent fraction of PM) (H) (400 mg·kg‑1·d‑1); GC plus PMR30 (M) (200 mg·kg‑1·d‑1); GC plus PMR30 (L) (100 mg·kg‑1·d‑1); GC plus PMRF (fat‑soluble fraction of PM) (H) (400 mg·kg‑1·d‑1); GC plus PMRF (M) (200 mg·kg‑1·d‑1); GC plus PMRF (L) (100 mg·kg‑1·d‑1); GC plus calcitriol (CAL; 0...
November 7, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29113124/role-of-placental-vdr-expression-and-function-in-common-late-pregnancy-disorders
#11
REVIEW
Julia Knabl, Aurelia Vattai, Yao Ye, Julia Jueckstock, Stefan Hutter, Franz Kainer, Sven Mahner, Udo Jeschke
Vitamin D, besides its classical role in bone metabolism, plays a distinct role in multiple pathways of the feto-maternal unit. Calcitriol is the major active ligand of the nuclear vitamin D receptor (VDR). The vitamin D receptor (VDR) is expressed in different uteroplacental parts and exerts a variety of functions in physiologic pregnancy. It regulates decidualisation and implantation, influences hormone secretion and placental immune modulations. This review highlights the role of the vitamin D receptor in physiologic and disturbed pregnancy, as preeclampsia, fetal growth restriction, gestational diabetes and preterm birth...
November 6, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29109124/endogenous-calcitriol-synthesis-controls-the-humoral-ige-response-in-mice
#12
Juliane Lindner, Sebastian Rausch, Sandra Treptow, Kerstin Geldmeyer-Hilt, Tina Krause, René St-Arnaud, Alice Arabian, Andreas Radbruch, Susanne Hartmann, Margitta Worm, Guido Heine
The vitamin D receptor participates in the control of IgE class-switch recombination in B cells. The physiologic vitamin D receptor agonist, 1,25(OH)2D3 (calcitriol), is synthesized by the essential enzyme 25-hydroxyvitamin D3-1α-hydroxylase (CYP27B1), which can be expressed by activated immune cells. The role of endogenous calcitriol synthesis for the regulation of IgE has not been proven. In this study, we investigated IgE-responses in Cyp27b1-knockout (KO) mice following sensitization to OVA or intestinal infection with Heligmosomoides polygyrus Specific Igs and plasmablasts were determined by ELISA and ELISpot, Cyp27b1 expression was measured by quantitative PCR...
November 6, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29108038/prepartum-daylight-exposure-increases-serum-calcium-concentrations-in-dairy-cows-at-the-onset-of-lactation
#13
R Özçelik, R M Bruckmaier, L E Hernández-Castellano
In dairy cows, hypocalcemia is caused by the sudden calcium demand by the mammary gland at the onset of lactation. Calcitriol (1,25-dihydroxy vitamin D; 1,25-VitD) increases the intestinal calcium absorption and the renal calcium reabsorption. Daylight contributes to the formation of 1,25-VitD, as it transforms 7-dehydrocholesterol into cholecalciferol, a 1,25-VitD precursor. Calving pens are usually set in quiet places where cows can stay calm and relaxed before parturition. However, those pens often have poor lighting conditions and therefore cows may become vitamin D deficient because of inadequate daylight exposure...
October 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/29107178/1-25-dihydroxycholecalciferol-calcitriol-modifies-uptake-and-release-of-25-hydroxycholecalciferol-in-skeletal-muscle-cells-in-culture
#14
M Abboud, M S Rybchyn, Y J Ning, T C Brennan-Speranza, C M Girgis, J E Gunton, D R Fraser, R S Mason
The major circulating metabolite of vitamin D3, 25-hydroxycholecalciferol [25(OH)D], has a remarkably long half-life in blood for a (seco)steroid. Data from our studies and others are consistent with the hypothesis that there is a role for skeletal muscle in the maintenance of vitamin D status. Muscle cells internalise vitamin D-binding protein (DBP) from the circulation by means of a megalin/cubilin plasma membrane transport mechanism. The internalised DBP molecules then bind to actin and thus provide an intracellular array of high affinity binding sites for its specific ligand, 25(OH)D...
October 26, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29102624/antitumoral-effects-of-the-alkynylphosphonate-analogue-of-calcitriol-em1-on-glioblastoma-multiforme-cells
#15
María Julia Ferronato, Eliana Noelia Alonso, Débora Gisele Salomón, María Eugenia Fermento, Norberto Ariel Gandini, Mario Alfredo Quevedo, Evangelina Mascaró, Cristian Vitale, Yagamare Fall, María Marta Facchinetti, Alejandro Carlos Curino
Glioblastoma multiforme (GBM) is the worst and most common brain tumor, characterized by high proliferation and invasion rates. The current standard treatment is mainly based on chemoradiotherapy and this approach has slightly improved patient survival. Thus, novel strategies aimed at prolonging the survival and ensuring a better quality of life are necessary. In the present work, we investigated the antitumoral effect of the novel analogue of calcitriol EM1 on GBM cells employing in vitro, in silico, and in vivo assays...
November 1, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29101653/stomach-and-bone
#16
Alice M Kitay, John P Geibel
The relation between gastrointestinal organs and bone metabolism has become clearer during the last decades. Of paramount importance is the tight and intertwined regulation of gastric acid secretion and bone metabolism in regard of diseases caused by dysfunction of any of these or intermediary organs or mediators. The importance of the functions of the endocrine modulators 1,25(OH)2 vitamin D (calcitriol), PTH, and calcitonin becomes clear when seeing misbalances and its impact on the skeleton. Another important player in the gut-bone signaling axis is calcium, which is operating through the calcium-sensing receptor (CaSR)...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29099939/pth-1-34-for-surgical-hypoparathyroidism-a-2-year-prospective-open-label-investigation-of-efficacy-and-quality-of-life
#17
Andrea Palermo, Assunta Santonati, Gaia Tabacco, Daniela Bosco, Antonio Spada, Claudio Pedone, Bruno Raggiunti, Tina Doris, Daria Maggi, Franco Grimaldi, Sivlia Manfrini, Fabio Vescini
Context: Daily PTH(1-34) administrations can reduce the required total daily dose of calcium/calcitriol and restore normocalcemia in refractory hypoparathyroidism. However, most of the PTH(1-34) trials were conducted on small cohorts including subjects with hypoparathyroidism of various etiologies and quality of life(QOL) was not investigated. Objective: To investigate the effects of 24 month PTH(1-34) treatment in a homogeneous cohort of adult subjects with postoperative hypoparathyroidism and to evaluate quality of life(QOL) changes...
November 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29099779/self-emulsifying-granules-and-pellets-composition-and-formation-mechanisms-for-instant-or-controlled-release
#18
REVIEW
Ioannis Nikolakakis, Ioannis Partheniadis
Many articles have been published in the last two decades demonstrating improvement in the dissolution and absorption of low solubility drugs when formulated into self-emulsifying drug delivery systems (SEDDS). Several such pharmaceutical products have appeared in the market for medium dose (Neoral(®) for Cyclsoprin A, Kaletra(®) for Lopinavir and Ritonavir), or low dose medications (Rocaltrol(®) for Calcitriol and Avodart(®) for Dutasteride). However, these are in the form of viscous liquids or semisolid presentations, characterized by the disadvantages of high production cost, stability problems and the requirement of large quantities of surfactants...
November 3, 2017: Pharmaceutics
https://www.readbyqxmd.com/read/29099543/vitamin-d-supplementation-for-chronic-liver-diseases-in-adults
#19
REVIEW
Goran Bjelakovic, Dimitrinka Nikolova, Marko Bjelakovic, Christian Gluud
BACKGROUND: Vitamin D deficiency is often reported in people with chronic liver diseases. Therefore, improving vitamin D status could have a beneficial effect on people with chronic liver diseases. OBJECTIVES: To assess the beneficial and harmful effects of vitamin D supplementation in people with chronic liver diseases. SEARCH METHODS: We searched The Cochrane Hepato-Biliary Group Controlled Trials Register, Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, Embase, Science Citation Index Expanded, and Conference Proceedings Citation Index - Science...
November 3, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29093248/-effect-of-cinacalcet-combined-with-low-dose-calcitriol-on-clinical-outcome-and-bone-metabolism-in-patients-with-severe-secondary-hyperparathyroidism
#20
Fang Yuan, Xing Chen, Chang Wang, An Zhou, Hong Liu
To observe the clinical outcome and the effect of the combination of cinacalcet hydrochloride with low-dose calcitriol on bone metabolism in maintenance hemodialysis (MHD) patients with severe secondary hyperparathyroidism (SHPT).
 Methods: Thirty SHPT patients were enrolled to receive treatment of cinacalcet combined with low-dose calcitriol, with inclusion criteria as follows: maintenance on MHD>6 months; serum intact parathyroid hormone (iPTH)>600 pg/mL; parathyroid glands with more than 1 nodules by ultrasonography; traditional therapy with no effects...
October 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
keyword
keyword
60842
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"